padscan hd 5 - us med equip hd5 service man… · product name：bladder scanner model：hd 5 ......
TRANSCRIPT
i
PadScan HD 5
Bladder Scanner
Service Manual
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Caresono Technology Co., Ltd. All rights reserved.
Product Information:
Product Name：Bladder Scanner Model：HD 5
Issued Date of this manual：2012-05
Version：1.1
iii
Intellectual Property Statement
Caresono Technology CO., LTD. (hereinafter called Caresono) owns the intellectual
property rights to this Caresono product and this manual. This manual may refer to
information protected by copyrights or patents and does not convey any license under
the patent rights of Caresono, nor the rights of others. Caresono does not assume any
liability arising out of any infringements of patents or other rights of third parties.
Caresono intends to maintain the contents of this manual as confidential information.
It is strictly prohibited to disclosure of the information in this manual in any manner
without the written permission of Caresono .
Release, amendment, reproduction, distribution, rent, adaptation and translation of
this manual in any manner whatsoever without the written permission of Caresono is
strictly prohibited.
is the registered trademarks or trademarks owned by Caresono in China
and other countries. All other trademarks that appear in this manual are used only for
editorial purposes without the intention of improperly using them. They are the
property of their respective owners.
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Responsibility on the Manufacturer Party
Contents of this manual are subject to changes without prior notice.
All information contained in this manual is believed to be correct. Caresono shall not
be liable for errors contained herein nor for incidental or consequential damages in
connection with the furnishing, performance, or use of this manual.
Caresono is responsible for safety, reliability and performance of this product only in
the condition that:
• all installation operations, expansions, changes, modifications and repairs of this
product are conducted by Caresono authorized personnel;
• the electrical installation of the relevant room complies with the applicable national
and local requirements;
• the product is used in accordance with the instructions for use.
WARNING: It is important for the hospital or organization that employs
this equipment to carry out a reasonable service/maintenance plan. Neglect of this
may result in machine breakdown or injury of human health.
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Warranty
THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.
Exemptions
Caresono's obligation or liability under this warranty does not include any
transportation or other charges or liability for direct, indirect or consequential
damages or delay resulting from the improper use or application of the product or the
use of parts or accessories not approved by Caresono or repairs by people other than
Caresono authorized personnel.
This warranty shall not extend to:
Any Caresono product which has been subjected to misuse, negligence or
accident;
Any Caresono product from which Caresono's original serial number tag or
product identification markings have been altered or removed;
Any product of any other manufacturer.
vi
Return Policy
Return Procedure
In the event that it becomes necessary to return this product or part of this product to
Caresono, the following procedure should be followed:
1. Obtain return authorization: Contact the Caresono Service Department and obtain a
Customer Service Authorization (Caresono) number. The Caresono number must
appear on the outside of the shipping container. Returned shipments will not be
accepted if the Caresono number is not clearly visible. Please provide the model
number, serial number, and a brief description of the reason for return.
2. Freight policy: The customer is responsible for freight charges when this product is
shipped to Caresono for service (this includes customs charges).
3. Return address: Please send the part(s) or equipment to the address offered by
Customer Service department.
Company Contact
Manufacturer：Caresono Technology Co., Ltd
Address: 4th Floor, No.11 Building, Initiating Zone, Instruments and Meters
Industry Base, Dandong, Liaoning 118009, China
Tel：0415－6279782 Fax：0415－3191279
Global Sales Center : Caresono Technology Co., Ltd
Address: BF13 Nanshan Medical Equipments Park, No.1019 Nanhai Rd.
Nanshan, Shenzhen, China
Tel：+86 755 86367662 Fax: +86 755 86365909
EC-Representative：Bernhardt Kern
Address：Johann Hoerbigerg.6 1230 Vienna
Phone：0043-650 735 2005
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Safety Precautions
1. Meaning of Signal Words
Please read operation manual and this service manual before maintenance. In this
operation manual, the signal word “warning” is used regarding safety and other
important instructions. The signal words and their meanings are defined as follows.
Please understand their meanings clearly before reading this manual.
Signal word Meaning
WARNING
Indicates a potentially hazardous situation which, if not avoided,
could result in death, serious injury, moderate injury or property
injury.
2. Meaning of Safety Symbols
Symbol Description
Type B equipment
“Attention” indicates the points requiring attention. Be sure
to read the operation manual concerning these points before
using the equipment.
3. Safety Precautions
Please observe the following precautions to ensure patient and operator safety when
using this system.
Caution：1. When measuring volume, the better the techniques are taken and the better the
images are, the more accurate the results are.
2. Please refer to the operation manual when calibrating device.
3. Measurement must be taken after selecting the measurement object.
4. Refer to the Operation Manual (Fundamentals) for precautions regarding the
use of this system.
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Contents
CHAPTER1 GENERAL DESCRIPTION ..................................................................... 1
1.1 INTRODUCTION ........................................................................................... 1
1.2 PREPARATION FOR REPAIR ...................................................................... 3
1.3 SCHEMATIC DIAGRAM .............................................................................. 4
CHAPTER2 STRUCTURE OF THE COMPLETE MACHINE & DISASSEMBLY.5
2.1 STRUCTURE OF THE COMPLETE MACHINE ......................................... 5
2.1.1 The appearance view of the main unit .................................................. 5
2.1.2The exploded drawing of the complete machine……………………...6
2.1.3 The base assembly ................................................................................ 7
2.2 DISASSEMBLY .............................................................................................. 7
2.2.1 Disassembly of the main unit ................................................................ 7
2.2.2 Disassembly of the main board and the printer .................................... 8
2.2.3Disassembly of the front coever part .................................................... 9
2.2.4Disassembly of the base ...................................................................... 10
2.2.5 Disassembly of the power board ......................................................... 10
CHAPTER3 DESCRIPTION OF THE PRINCIPLE .................................................. 12
3.1 THE PRINCIPLE OF THE HARDWARE ................................................... 11
3.1.1 The connection diagram between the main board and boards ............ 12
3.1.2 The main board（HD-PG V-1.4） ....................................................... 13
3.1.3 U disk interface board (HD-PG-JK1.0)…………………………18
3.1.4 Display screen signal switching driver board（HD-LED POWER V1.2）
...................................................................................................................... 19
3.1.5 Power switch key board（HD-DG-FJ-01A) ...................................... 19
3.1.6 Power socket board（HD-DG-FJ-02) ................................................ 19
3.1.7 Battery interface board（HD-DG-FJ-04A） ..................................... 20
3.1.8 Touch screen driver interface board（SLT-TP05-RS232B）............. 20
3.1.9 Printer interface driver board（OEM SS205） .................................. 20
3.1.10 Display screen………………. ........................................................ 21
3.1.11 Touch screen ...................................................................................... 21
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3.1.12 Probe ................................................................................................. 21
3.1.13 Printer ................................................................................................ 21
3.1.14 Base ................................................................................................... 21
3.1.15 The description of the hardware ....................................................... 22
CHAPTER4 TROUBLESHOOTING ......................................................................... 28
4.1 Can not power on or power off…………………..…………………………28
4.2 No image display…………………………………………………………..29
4.3 No Response from the touch screen……………………………………….. 30
4.4 Can not measure the volume…. .................................................................... .30
4.5Printer can not print ........................................................................................ 31
4.6 U disk can not work or data can not be uploaded .......................................... 31
CHAPTER5 MAINTENANCE AND CLEANING .................................................... 33
5.1 MAINTENANCE TO BE PERFORMED BY USER ................................... 33
5.1.1 Cleaning the system ............................................................................ 33
5.2 MAINTENANCE TO BE PERFORMED BY SERVICE PERSONNEL .... 33
1
Chapter1 General Description
1.1 Introduction
The Pad Scan HD 5 is a device that applies ultrasonic imaging and measure theory
and provides non-invasive volume measurement of the bladder. Pad scan adopt 3D
Mechanical sector scanning probe to proceed with ultrasonic scan of the bladder,
and translate the scanned information of the bladder into many 2D type B
ultrasonic images, acquired many cross-sectional area of the bladder after
complicated image processing and projected to be 3D image, finally figured out the
volume of the bladder by complicated calculation.
1. Front view
Power indicator
Power key
Figure1-1 Front view
2
2. Rear view
Figure 1-2 Rear view
3. Right view
power interface USB interface probe interface
Figure 1-3 right view
3
4. Bottom view
Charging interface air inlet
Figure 1-4 bottom view
1.2 Preparation for Repair
The needed tools and measurement devices are shown as followed:
Table 1-1 Tools and Devices for Repair
Tool Model Manufacturer Spec./Standard
Screwdriver (various sizes and
types)
Unspecified
Welding iron and stand Unspecified
Welding tool Unspecified
Tweezers Unspecified
Table 1-2 Consumable Material
Consumable Material Model Manufacturer Spec./Standard
Insulation tape Unspecified
Hishilite tube, Isolated tube
(various types)
Unspecified
Wires (various types) Unspecified
Screws, nuts, washers
(various types)
Unspecified
Solder
Paper file (various types)
Ethanol for cleaning and
4
disinfection
1.3Schematic Diagram
Figure 1-5 Schematic Diagrams
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Chapter2 Structure of the Complete Machine &
Disassembly
2.1 Structure of the Complete Machine
2.1.1 The appearance view of the main unit
Figure 2-1 the appearance view of the main unit
2.1.2 The exploded drawing of the complete machine
2.1.2.1 The exploded drawing of the complete machine
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Figure 2-2 the exploded drawing of the complete machine
2.1.2.2 Parts of each assembly
1. Front cover
2. Touch screen
3. LCD SCREEN
4. LCD screen fixing board
5. Print driver board
6. touch screen driver board
7. the main board
8. printer fixing frame
9.printer
10.interface board
11. rear cover
12. probe cup
13.battery
14.battery buckle
15. LCD driver board
16.power key
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2.1.3 The base assembly
2.1.3.1 Assembly and outline drawing of the base
Figure 2-3 assembly drawing of base（1）
2.2 Disassembly
2.2.1 Disassembly of the main unit
1. Power on the mainframe
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Figure 2-4 the disassembling drawing of the mainframe
A. Remove the six M3*15 fixing screws of the rear cover
B. Apart the front cover and rear cover, remove the associated lines，as figure 2-5
Figure 2-5 the disassembling drawing of the mainframe
2.2.2. Disassembly of the main board and printer
Figure 2-6 the disassembling drawing of the main board and printer
1．Two m3x5 self-tapping screws
1
2
3
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2．Four m3x8 self-tapping screws
3．Two m3x8 self-tapping screws，two m2.5x8 self-tapping screws，two m3x8
mechanical screws
A. Before disassembling the main board, first remove the nuts outside the probe
connector, and then remove six screws as shown in the figure.
B. Remove the four m3x8 fixing screws, and then take out the printer and the printer
driver board.
2.2.3 Disassembly of the front cover
Figure 2-7 Disassembly of the front cover
A. Remove the four M3x8 fixing screws
B. Unplug the connection line between the touch screen driver board and touch screen,
unplug the connection line between the display conversion board and the LCD screen,
and then you can remove the display screen and the touch screen.
C. remove the two M3x8 screws, then remove the key board and the keys.
1
2
10
2.2.4 Disassembly of the base
Figure 2-8 the bottom of the base
A.Remove the four cushions, and then remove four m3x28 locking screws
2.2.5 Disassembly of the power board
Figure 2- Disassembly drawing of the power board
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A. take out the power supply board by uplifting the PCB board from the side of power
input connector.
B. then weld the line of power supply board
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Chapter3 Description of the Principle
3.1 The Principle of the Hardware
3.1.1 The connection diagram between the main board and boards
Figure 3-1 HD 5 the connection diagram of main frame
This device includes ： 1.main board(HD-DGV-1.4) ， 2.USB interface
board(HD-PG-JK1.0)、3. display screen signal switching driver board（HD-LED
POWER V1.2）、4.power switch key board（HD-DG-FJ-01A)、5.power socket board
（HD-DG-FJ-02)、6.battery interface board（HD-DG-FJ-04A)、7.touch screen driver
interface board（SLT-TP05-RS232B）,8.printer interface driver board（OEM SS205）,
refer to the links among them as figure 3-1
In addition, the device also includes: display screen, touch screen, Li-ion battery, fan,
printer, base(in power adapter), probe, power plug board（HD-DG-FJ-03), probe
scanning switch board（HD-DG-FJ-05A), probe connector（HD-DG-FJ-06).
Probe interface, frame memory、chart memory、probes driver circuit, transmission
circuit, signal preamplifier circuit, A/D conversion circuit, FPGA programmable logic
control circuit and voltage producing circuit needed by the circuit are all installed on
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the main board (HD-DGV-1.4) of the mainframe. USB interface, uploading computer
interface circuit, and external power spare interface are installed on the USB interface
board (HD-PG-JK1.0). The printer and fan are fixed on the rear cover. Display screen
and touch screen are fixed on the rear cover. Power scanning socket board
（HD-DG-FJ-03) is fixed in the base(in the power adapter). The probe scanning
switch board（HD-DG-FJ-05A）and probe connector HD-DG-FJ-06) are installed in
the probe.
The li-ion battery or adapter charges the mainframe. The adapter charges the
mainframe through power socket board （HD-DG-FJ-02）. The li-ion battery charges
the mainframe through battery interface board（HD-DG-FJ-04A). That the main board
charges the battery is also through this interface.
3.1.2 The main board（HD-PG V-1.4）
3.1.2.1 Principle description
The main board can realize the functions such as transmission and reception, beam
forming, signal processing, B ultrasound imaging, three-dimensional probe motor
driver, internal information storage, USB storage and information uploaded computer
control, displaying driver control, voltage generating, etc.
The CPU and FPGA of the control processor on the main board connect with the
probe interface; probes driver circuit, probe transmission circuit, receiving
amplification circuit, A/D conversion circuit, frame memory circuit, icon memory and
image processing circuit. The control processor connects with the USB interface
board (HD-PG-JK1.0). The control processor connects with the USB interface board,
which stores the information into the U disk or to the computer workstation through
the interface.
Control processor connects with the USB interface board, and the information will be
stored into the U disk or the computer workstation through this interface.
3.1.2.1.1 Control processor
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The control processor accepts different key commands of the screen, issuing different
series of commands and signal, which coordinate with the whole unit based on
different key requests. The specific implementation: adopting FPGA and its kernel,
programming control realizes this function. Issuing directive controls the whole unit
working orderly(Producing corresponding control signal). Issuing directive produces
driver signals of the probe to make the probe scan.
Issuing directives indicates the imaging processor to accept the ultrasound digital
signal and do digital scanning conversion, image signal processing, image storage.
The digital image will be sent to TFT-screen to display. USB conversion signal will be
sent to USB output interface. The information can be uploaded to the computer
through this interface.
Issuing directives indicates to transmit, receive and amplify the ultrasound signal.
After amplifying, the signal will be A/D converted and sent to the imaging processor.
Issuing directives prints the patient’s information, B-ultrasound image and bladder
volume. After the control processor receives the printing directive and bladder
scanning directive, scanning and measuring will be done automatically. Then the
results will be displayed on the screen.
Issuing directives indicates imaging processor to store the image information to
internal or external SD memory. According to different key requests, the control
processor generates varieties of chart information and control inputting the
information to the chart memory and reading out the information from the chart
memory.
3.1.2.1.2 Imaging processor
Imaging processor converts the digital ultrasonic signal into digital scanning. During
the design, as the way of transmission scanning imaging is different from that of the
TFT scanning imaging, and the speed of imaging is also different, DSC is designed to
realize ultrasound transmission scanning changed into TFT scanning mode. DSC can
also deal with digital images, compensation processing, coordinate transformation, etc.
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Average, enhancement, gamma correction, digital zoom, logarithmic compression,
smoothing interpolation and band pass of images, harmonic imaging and other series
of are all finished in DSC. The final image displayed on the screen. The deposited
information will be stored into memory by the imaging processor. The information
will be sent to the screen when the information is read out from the memory. The
specific implementation: adopting FPGA and its kernel, programming control realizes
this function.
3.1.2.1.3 Internal memory
According to the command of the control processor, the information needed to be
stored is stored into the internal memory, or transferred to playback display. Internal
memory can be divided into frame memory and graphics memory. The frame memory
stores images information, while graphics memory stores all information except
images.
3.1.2.1.4 The probe driver
The probe scanning driver, general sector scan of B-type ultrasonic diagnostic device
adopting mechanical sector scan probe, relies on mechanical transmission to drive the
sensors to realize sector scanning. The mainframe adopts swinging (with rotation)
three-dimensional ultrasound probes, which is a three-phase stepper motor driving
directly. Probe scanning control: there are two stepper motors in the probe: down
located stepper motor do rotate motion of 1800 along the longitudinal axis, while up
located stepper motor do oscillating motion of 1200. When down located stepping
motor reached the edge site, fixed; up located motor do 1200 oscillating motion, and
now we acquired an ultrasonic image. Then let the down located stepping motor turn
150, fixed, up located stepping motor turn 1200, acquired the second image. And
continue let the down located stepping motor turn 150, up located stepping motor
scanning, reduplicate in such way, until the down located stepping motor turned 1800,
ceased, 13 images were acquired, take 12 of them, process and calculation by the
inner core of FPGA, finally figured out the volume of the bladder. The specific
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implantation: adopting FPGA and its kernel, programming control realizes this
function.
3.1.2.1.5 Transmission circuit
According to the command of the control processor, the transmission circuit generates
transition pulse with natural frequency of the probe to the probe chip.
3.1.2.1.6 Receiving amplification circuit
According to the command of the control processor, the receiving amplification
circuit receives the signal of the probe and amplifies the signal.
3.1.2.1.7 A/D conversion
According to the command of the control processor, the A/D conversion changes the
amplified analog ultrasonic signal into digital signal and sends it to the image
processor.
3.1.2.1.8 Probe interface
The probe interface is the port through which the probe connects with the mainframe.
Transmission and receiving signal of the probe, the driver probe of the probe scanning
are all through this port.
3.1.2.1.9 probe interface（XS6）
Probe interface: this interface on the board is the connection port of the mainframe
and probe. The main board of the mainframe connects with the probe through this
interface. The main board control processor send motor driver signal to the motor of
the probe and transmission signal to ultrasonic transducer through this interface. At
the same time, accept the ultrasound reflected signal from the ultrasonic transducer.
3.1.2.1.10 the principle of power
The power system is designed to supply power for device, and it can supply eight
static DC outputs, including the +5 V、-5V、+14V、+5.6 V、+3.3 V、+1.2 V、+2.5
V、+70V. +14V is the adapter output. The performance specifications for each output
are shown in Table 3-1.
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Table 3-1 the specifications for the power board outputs
item Rated
Voltage
Voltage
Precision
Rated
Load
Voltage
Adjustment
Rate
Load
Adjust
ment
Rate
Use
1 A＋70V
±5%
80MA
<2% <5%
Analog circuit
(Transmission)
2 D+14V 3A System powers
supply
3 +5V 3A Digital and
analog circuit
4 －5V 0.2A Analog circuit
5 +3.3V 2A Digital circuits
FPGA
6 +2.5V 0.2A Digital circuits
FPGA
7 +1.2V 0.2A Digital circuits
FPGA
8 +DJV+5.6V 3A Motor driver
Power principle diagram as figure 3-2：
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Figure3-2 Power principle diagram
3.1.3 U disk interface board (HD-PG-JK1.0)
U disk interface board：Contains the USB signal conversion circuit, and the circuit
will convert the signal of the mainframe into digital signal of USB2.0 interface
protocol. It also includes the USB2.0 interface. U disk interface board is the signal
conversion board connected to the mainframe computer, and the board is connected
through the socket JP1of the board and the socket JP1 of the motherboard. According
to the instruction from main control processor, USB interface board and the
motherboard control could communicate, which can realize two functions:
(1) USB Flash disk storage: inserting USB Flash disk in the XS2 interface a USB disk
interface board can expand memory capacity, and save the needed information into
the USB disk. USB disk can be easily pulled out and inserted. When USB disk
information is full, we can pull the USB disk out and insert it into the mainframe
computer, then USB disk information is permanently stored in the computer.
(2) External PC (external computer) function: will process the mainframe
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information through switching the XS3 interface of USB interface board to the
external computer workstation.
Note: XS1 interface of interface board is the input interface of spare mainframe power
Interface XS5 of the interface board connects with the fan. (the supplying power of
the fan is +5V).
3.1.4 Display screen signal switching driver board（HD-LED POWER V1.2）
Display screen signal switching driver board: The signal outputted from the
mainframe to the display screen must be rearranged through this board to adapt to the
pin arrangement of the display screen. The socket J4 of this board connects with
socket XS4 of the main board. The information outputted from the main board to the
screen is received to this board through this socket. Then the information received
will be rearranged. The control information of the screen and the display information
will be sent to the screen through socket J5 of this board. And the driver power of the
screen is sent to the screen through J2 of this board.
3.1.5 Power switch key board（HD-DG-FJ-01A)
Power switch key board: socket XS1 of this board connects with socket XS1 of the
main board. This board communicates with the main board. After the main board
receives the request of the power switch key, it controls the switch indicator status.
Both the power switch and power indicator are on this board. When the mainframe
connects with the power (the mainframe power is not on), the right side of the power
switch key indicator is on. When the power switch is on, both the right and left side
indicators are on. When the mainframe disconnects with the power, both sides
indicators are off.
3.1.6 power socket board（HD-DG-FJ-02)
Power socket board: the function of this board is to connect the mainframe supplying
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power DC+14V outputted by the base to the socket XS1 of this board. Then through
the socket XS2 of this board the power is outputted the socket JP3 of the main board
to supply power to the main frame.
3.1.7 Battery interface board（HD-DG-FJ-04A）
Both battery power supplying the mainframe and mainframe charging the battery are
through connecting this board. The socket JP7 of the main board connects with the
socket XS2 of this board, the socket XS2 connects with socket XS1 of this board, the
socket XS1 of this board connects with battery, completing the function of battery
power supplying the mainframe and mainframe charging the battery. In addition, a
clock chip power supplying battery (DC 3V output) is also on this board, which
supply power to the clock chip of the main board through the socket XS3 of this
board.
3.1.8 touch screen driver interface board（SLT-TP05-RS232B）
Touch screen driver interface board ： serial port chip RS232 of this board
communicates with the serial port chip RS232 of the main board. The socket J1 of the
touch screen driver interface board connects with socket JP6 of the main board. The
touch screen driver interface board sends request signal from the touch screen to the
control processor of the main board. Then the control processor issues the appropriate
instructions according to the request.
3.1.9printer interface driver board（OEM SS205）
Printer interface driver board: the main board communicates through serial port chip
RS232 and printer interface driver board. The socket JP5 of the main board connects
with the socket JCOM of printer interface for data communication and control the
printer. The socket JP4 of main board connects with the socket POWER of the printer
interface driver board, providing working voltage (CD+5V) from mainframe to the
printer.
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3.1.10 display screen
According to the command of the control processor，the screen displays some of the
following information pictures: ultrasound scanning image, play backing original
information of database, selecting menu information.
3.1.11 touch screen
The touch screen accepts operator’s key request, and send the request signal to the
control processor and give instructions according to control processor’s request.
3.1.12 probe
The probe is the device that energy can be converted and scanning can be formed,
which converts the electrical power into mechanical power and converts the
mechanical power into ultrasound power.
3.1.13 printer
According to the command of the control processor， print the patients’ information,
patients’ bladder scanning image and the result of the bladder volume.
3.1.14 base
Base: the base is actually the power supply of the mainframe, this is: the power
adapter. The input voltage of the adapter is AC 110V-240V, and the output voltage is
DC +14 V. The output voltage is sent to the power socket board（HD-DG-FJ-02)
through connecting the XS1 socket of the power socket board （HD-DG-FJ-02), and
socket XS2 of the power socket board （HD-DG-FJ-02) connects with the JP3 of the
main board, providing working voltage for the whole unit.
22
3.1.15 Description of the principle of the hardware
The mainframe adopts swinging (with rotation) three-dimensional ultrasound probes
which is a three-phase stepper motor driving directly. Probe scanning control: there
are two stepper motors in the probe: down located stepper motor do rotate motion of
1800 along the longitudinal axis, while up located stepper motor do oscillating motion
of 1200. When down located stepping motor reached the edge site, fixed; up located
motor do 1200 oscillating motion, and now we acquired an ultrasonic image. Then let
the down located stepping motor turn 150, fixed, up located stepping motor turn 1200,
acquired the second image. And continue let the down located stepping motor turn
150, up located stepping motor scanning, reduplicate in such way, until the down
located stepping motor turned 1800, ceased, 13 images were acquired, take 12 of them,
process and calculation by the inner core of FPGA, finally figured out the volume of
the bladder. Up located three-phase stepper motor driver the crystal oscillator to do
oscillating motion of 1200, and at the same time, crystal oscillator transmits ultrasonic
wave to form scanning. This ultrasonic produced reflects or scattered when get
through the human organization. Do location on the tissue organ based on its return
time, and check the characteristics of the tissue based on its intensity. But send such
pulse can only acquire one signal of one plane. To acquire a two-dimensional tissue
image, at least ultrasonic wave need to be sent 128 times. Then the transmitted and
received images displayed on the screen. Finally one image agreeing with the actual
section is formed on the screen.
The driving pulse wave diagram of the 12 images taken by the up located stepper
motor and down located stepper motor as the following:
23
Up located stepper motor positive rotation wave diagram as following:
Up located stepper motor negative rotation wave diagram as following:
The specific implementation: adopting FPGA and its kernel, programming control
realizes this function.Ultrasonic signal transmitting and receiving control: the
transmission of the probe is based on the natural frequency of the probe. The control
processor outputs transmission pulse corresponding with the pulse width to the
24
transmission circuit. The transmission circuit amplifies the pulse and sends it to the
probe chip. The probe chip is actually an energy conversion device. Transmission is
the energy conversion that changes the transmission pulse (electrical energy) to
mechanical energy and then into ultrasonic energy. Receiving is the conversion that
changes ultrasonic energy into mechanical energy and then into electrical energy.
The signal receiving is the process of the ultrasound amplifier amplifies the
ultrasound signal and then the signal is sent to the A/D conversion circuit and
converted to digital signal. The specific implementation: FPGA outputs transmission
signal. The transmission circuit is consisted of apparatus like field effect, etc. The
receiving circuit is consist of amplifier and A/D conversion circuit. FPGA outputs
control pulse.
Bladder volume measuring function: bladder volume measuring adopts the
technology that dual-motor three-dimensional ultrasound probe scan the sector
rotating successively along the axis to acquire ultrasound information of the bladder’s
different sections. After acquiring several different computing values “S” of the
cross-section of the entire bladder, we can get the bladder volume through complex
measuring. As the computing is complex, and to meet the requirement of speed, we
adopt the kernel of FPGA as controller to control and operate. Without using the
traditional CPU as the system controller and calculator improves the control ability
and operation reliability. Also, the speed of system computing is improved.
Information storage control can store the patient’s name, ID, age, gender, scan time,
bladder volume value, 12 B- ultrasound images into the internal memory or external
U disk permanently according to the control command sent from the controller. At the
same time, all this information can be read out from both memories and be sent to the
screen or printer. During the design, we adopt the combination of hardware and
software, and FPGA, making the device small size, light weight, easy carry and
providing convenience for the nursing staff to measure the bladder volume and
diagnose further urologic diseases.
25
3.2 principle of the software
3.2.1 Functions and features of the operation system
is a priority scheduling-based preemptive real-time kernel, and basic
system services such as semaphores, mailboxes, message queues, memory
management and interrupt management are provided in this kernel.
possesses the following features:：1. real-time 2. response to
asynchronous events 3. Response to synchronization event 4. Interrupt management 5.
certain conversion time and interrupt latency 6. advanced sequencing
Operating system can realize the functions such as task conversion,
the arrangement of task order, the communication between task, synchronization,
mutual exclusion and interrupt management.
3.2.2 Description of the system software
3.2.2.1 The structure of the system software
26
Figure 3-8 the structure of the system software
3.2.2.2 Description of object functions
1. Case management
Case management is the management of patients’ information, scanned images and
volume value. The management content includes, patients' gender, age, ID, name,
volume value, the scanned image, the name of the operator and operating time.
2. Printing management
The printer adopts serial printing mode and the printing command adopts the common
ESC control command. Printing content includes: 1. gender, age, ID, name, volume
value, the scanned image and operating time. 2. Flash capacity, EPCS capacity,
SDRAM capacity, SRAM capacity, battery capacity, patients’ information and
checking date included.
3. System setting
Including：power management, operation mode, scanning mode, printing options,
projection selection, registry setting, and clock management.
The main interface
Case
man
agemen
t
Prin
ting
man
agemen
t
System
man
agemen
t
Pro
be scan
nin
g
Info
rmatio
n
storage
Nam
e in
pu
t
ID in
pu
t
Age in
pu
t
Gen
der in
pu
t
Pow
er
man
agemen
t
Op
eration
mo
det
Scann
ing m
od
e
Prin
ting settin
g
Pro
jectio
n s
ele
ctio
n
Lo
gg
ing
se
tting
Clo
ck m
an
age
men
t
Pre
-sca
nn
ing
scan
ing
Co
mp
ressio
n s
tora
ge
Decom
pre
ssio
n d
isp
lay
27
The power management includes automatic shutdown and automatic screen saver
time settings. Operation mode includes 6 images and 12 images scanning mode.
Scanning mode includes easy mode and expert mode. Printing option is to select the
printing images sequence. Projection selection is to guide the user to find the
bladder’s right position. Clock management is to set the system time.
4. Probe scanning
Probe scanning can be divided into pre-scanning and scanning. When pre-scanning,
users can aim at the bladder according to the ultrasound image and the center line.
When scanning, the motor rotating 1650 can acquire 12 images.
5. Information storage
Information storage includes compression storage and decompression display. For the
gray-scale images of B ultrasound, adopting RLE coding to compress images. When it
is necessary to display, then do decompressing operation.
28
Chapter4 Troubleshooting
4.1 can not power on or power off
Check the system according to the following chart:
YES
NO
YES
NO
Can not power on or power
off
Board HD-DC14’s fault Replace board
HD-DC14
Board HD-PG V-1.4’s fault Replace board
HD-PGV14
Replace board HD-PG-FJ-01A
29
4.2 No image display
Check the system according to the following chart:：
YES
NO YES
NO
No display
Board HD-PGV-1.4’s fault Replace board
HD-PGV-1.4
Board HD-LED POWERV1.2’s fault
Replace board
HD-LED
POWERV1.2
Replace the LCD screen
30
4.3 No Response from the touch screen
Check the system according to the following chart：
NO
YES
YES
NO
4.4 can not measure the volume
Check the system according to the following chart:
YES
NO
No response from the touch screen
Board SLT-TP05-RS232B’s fault
The touch screen’s fault
Replace board
SLT-TP05-R
S232B
Replace board HD-PG V-1.4
Replace the touch
sreeen
Can not measure the volume normally
Probe’s fault Replace the
probe
Replace board HD-PG V-1.4
31
4.5 printer can not print
Check the system according to the following chart:
YES
NO
4.6 U disk can not work or data can not be uploaded
Check the system according to the following chart:：
YES
NO
Can not print or prints abnormally
Printer’s fault Replace the
printer
Replace board HD-PG V-1.4
U disk can not work or data can not be uploaded
常
容积
HD-PG JK 1.0’s fault Replace board
HD-PG JK1.0
Replace board HD-PG V-1.4
32
Other Faults list
No. FAULT Cause Remark
1 The fan doesn’t
work.
+5V power is
abnormal
The fan’s fault
◆check the +5V voltage
◆replace the fan
2
battery can not
be charged or
uncharged
Battery’s fault
HD-PG V1.4’s fault
Replace the battery
Replace the HD-PG V1.4
3
time or date
display
abnormal
3V button batter has
no power
HD-PG V1.4’s fault
Replace the 3V button
battery
Replace the HD-PG V1.4
4
The device and
not be powered
on or powered
off.
Check the connection
line between the
HD-PG-FJ-01A and
the HD-PG V1.4
HD-PG-FJ-01’s fault
HD-PG V1.4’s fault
Replace the connection
line
Replace the
HD-PG-FJ-01A
Replace the HD-PG V1.4
33
Chapter5 Maintenance and Cleaning
5.1 Maintenance to Be Performed By User
5.1.1 Cleaning the system
1. Cleaning the transducer
Perform the cleaning, disinfection and sterilization for the transducer according to the
corresponding transducer’s manual.
2. Cleaning the transducer socket
Use dry rag to wipe off the dirt on the transducer socket. If it is hard to get rid of the
dirt, use the mild detergent-soaked rag to wipe it off, then make the transducer socket
air-dried.
3. Cleaning the LCD screen
Use the glass cleaner-soaked rag to wipe CRT, and then make it air-dried.
4. Clean the base, cover and bracket
Use dry rag to clean the surface of the machine. Or use the rag dipped in neutral
detergent to wipe off the dirt, and then dry the machine by dry rag or make it
air-dried.
5.2 Maintenance to Be Performed By Service Personnel
The following checks are required to ensure the performance and safety of the system.
Contact your company representative when carrying out these checks, because they
require special techniques
Warning:：Before cleaning the system, be sure to turn off the power and
disconnect the power cable from the outlet. Cleaning the machine when the power
is “On” may result in electric shock.
Note：Be careful not to allow water or liquid to enter the system
during cleaning, otherwise it may result in malfunction or electric
shock.
34
Cleaning and Maintenance Measures：
Check category Check item
Cleaning Interior of the system
Peripheral devices
Electric safety Protective conductor resistance
Ground line leakage current
Enclosure leakage current
Patient leakage current I
Patient leakage current II
Patient auxiliary currency
Mechanical
safety
The casters
The caster mounting sections
The monitor mounting mechanism
Operating panel
Mounting mechanism for the peripheral
devices
Other mechanical parts
External appearance of the transducer
Image recording Images in each mode