wall embedding type high safe micro control system research

Wall Embedding Type High Safe Micro Control System Research

Haiying Zhang1 a, Xiangyan Yu2 b * and Zhenjun Chen1 c

1Qingdao Binhai University, Qingdao, China, 266555

2Qingdao Qian wan Container Terminal Co., Ltd., Qingdao, China, 266550

[email protected], [email protected], [email protected]

Keywords: Wall safes safe embedded advanced; Micro-control-system; LC246 alarm module; PIC16F877 Amicrocontroller

Abstract. This paper mainly studies the wall mounted high safe micro control system. The use of a

new control system make the safe is safer, more reliable. The safe has built-in microcomputer

control chipPIC16F877A, realizes the password control, automatic lock, an indoor alarming and

monitoring network and a series of functions, the thief cannot start. The apparatus is convenient for

household use, and is convenient for residential property and Public Security Bureau network

monitoring, has great social benefit and development foreground.

Introduction

The sixties and seventies of the 20th century because of the ever-changing semiconductor

technology, the industry developed electronic locks, electronic locks are widely used in various types

of safe products. After the turn LED, LCD digital display for safe, user demand for fire protection

has also spawned a variety of fire protection products, fingerprint scan recognition technology

development to promote the use of the fingerprint lock in the safe, and safe product categories when

the most simple functions to develop to theft, fire, burglar / fire, certain types of magnetically

shielded, home, commercial, hotel, etc.. A number of safe is not suitable for embedded walls, large, bulky weight, the safe system of internal controls in this study a wall embedded, the space-saving,

safe

Wall Embedded Micro-control System Safe

Micro-control Circuit. The circuit consists of a central control unit, the keyboard input unit, liquid

crystal display unit, alarm unit, motor drive unit, the signal detection unit, modulation and

demodulation unit, power supply circuit of several parts of the circuit components

Setting the external interface with the motherboard 12v AC power input interface Jac12v, indoor Burglary, Fire interfaces Jhm, for help button interface Jhp, network line interface Jline, online

programming and debugging interfaces Jtext.

Set the board's internal interface has four 1.2v rechargeable battery backup power interface Jdc,

16 key keyboard interface Jkey, LCD liquid crystal display interface Jmonitor, speaker interface, Jsp,

LED indicator Interface Jled, motor control interface Jmd, lock body position sensor Interface Jcg.

Refer to Figure 1 control circuit diagram

Central Control Unit. Master chip IC1, the Microchip's PIC16F877A microcontroller as the

basic module 8Kx14 MCU-bit Flash program memory, 512 bytes of special and common unit of

data storage, 256x8-bit non-volatile E2PROM data memory, arithmetic logic unit ALU, 5 input 33

output ports of I/O pins, configured three multifunction timer modules, embedded in a more

powerful watchdog timer, with a strong low-pressure line debugging and programming; the dedicated single-chip synchronous serial port module with SSP, universal Synchronous /

asynchronous Receiver Transmitter USART, parallel Slave port PSP, configure two distinctive

capture/Compare/PWM module CPP1 and CPP2, embedded in a 10-bit resolution A/D converter

ADC [1].

PIC16F877A total of five input and output ports A, B, C, D, E. Which has six port A pins RA0 ~

RA5; Port B has eight pins RB0 ~ RB7; eight port C pins RC0 ~ RC7; eight port D pins RD0 ~ RD7;

6th International Conference on Management, Education, Information and Control (MEICI 2016)

© 2016. The authors – Published by Atlantis Press


© 2016. The authors – Published by Atlantis Press 1260

port E has three arguments pin RE0 ~ RE2. These pins have different functions

This design uses Flash memory storage control program, through the debug interface JTEXT line

input and debugger, the use of E2PROM memory storage safe passwords, telephone numbers and

Internet address of the alarm by a large number of I/O interface to control an external circuit through

the USART module automatic multi-machine network alarm.

1

1

2

2

3

3

4

4

5

5

6

6

D D

C C

B B

A A

Title

Number RevisionSize

B

Date: 2010-8-9 Sheet of File: E:\项目\PIC原理图6.SCHDOC Drawn By:

RA0/AN02

RA1/AN13

RA2/AN24

RA3/AN3/VREF5

RA4/T0CKI6

RA5/SS/AN47

RB0/INT33

RB134

RB235

RB336

RB437

RB538

RB639

RB740

RC0/T1OSI/T1CKI15

RC1/T1OSI/CCP216

RC2/CCP117

RC3/SCK/SCL18

RC4/SDI/SDA23

RC5/SDO24

RC6/TX/CK25

RC7/RX/DT26

RD0/PSP019

RD1/PSP120

RD2/PSP221

RD3/PSP322

RD4/PSP427

RD5/PSP528

RD6/PSP629

RD7/PSP730

RE0/RD/AN58

RE1/WR/AN69

RE2/CS/AN710

VSS12

VSS31

MCLR/VPP1

OSC1/CLKI13

OSC2/CLKO14

VDD11

VDD32

IC1

100R4

100R5

100R6

100R7

100R8

100R9

100R10

1

2

3

4

5

6

7

8

9

10

11

12

Jkey

4.7

KR

1

4.7

KR

2

VDD

2

3

4

5

9

10

11

12

1

13

IC2

4.7kR3

4.7kR11

4.7kR13

4.7kR12

4.7kR19

4.7kR20

4.7kR28

4.7kR29

1

2

3

Jcg

DG2b

DG1b

U3

DU

U2

U1

JK

1K

R27

1K

R26

1K

R25

VDD

1

2

Jhp

1

2

3

Jhm

1 2 3

4 5 6

7 8 9

0 #*

F1

F2

F3

F4

1

2

3

4

5

6

7

8

9

10

Jmonitor

10K

RW

1KR32

1KR31

1KR30

1

2

3

4

Header 4

Jled

1 2 3 4 5 6 7 8 9 10

11

12

13

14

LCD

1 2

DS1

1 2

DS2

1 2

DS3

3CG21Q1

10K

R15

1K

R14

R17*

5.1K

R18

3DG6

Q2

1 2

1MHz

Y

20pFC1

2/20pFC2

820

R21

3.9k

R16

0.1uF

C3

200pF

C4

100pF

C5

0.1uFC6

Vss

33K

R24

3DG6

Q3

5K

R23

50K

R22

200pF

C8

Vss

Vss

0.1uFC7

1

2

3

Jline

VDD VDD

A -

+

ZD

OSC11

OSC22

SEL23

VSS4

OUT5

NC6

VDD7

SEL18

IC3

240KR35

5.6KR33

9013

Q5

9013Q4

12

DG1a

12

DG2a

VssLS

500

R37

500

R38

1N4007D

VDD

1KR34

1

2

Jmd

1

2

Jsp

DbrVin Vout

GND

IC4

470uF

C11

100pF

C12

100pF

C9

100uF

C10

1 2 3 4 5 6

Jtext1

2

3

Jac12v

1

2

Jdc6v

4x1.2V

VDD

VDDVDD

C13 0.1uF

Figure 1. Schematic control

Keyboard Input Unit. 16-key membrane keyboard connected to PIC16F877A via interfaces

Jkey the RB1 ~ RB7, RA0 ~ RA1, RD6 ~ RD7 pins. Which RB1 ~ RB7 matrix composed of four

lines of three connected 1,2,3,4,5,6,7,8,9,0, *, # twelve keys, RB4 ~ RB7-change interrupt function,

when the press any key to interrupt when notified by the CPU processing; RD7, RD6 and VDD

connected to the function keys F1 and F2, when press F1 or F2 key, RD7 RD6 to generate a high

level or through the gate by the IC2 or IC1's external interrupt request input terminal INT send a

request to the CPU; RA0, RA1 and VDD connected to the function keys F3 and F4 on the two key functions without interruption request, with the principal and other key operations.

LCD Display Unit. LCD Module LCD, you can display a letters, numbers, symbols and other

data point formation module HD44780. A total of 14 pins, pin No. 1 is the power to VSS, No. 2 pin

is the power supply VDD, No. 3 pin power the LCD display driver, No. 4 pin is the register select

signal RS, No. 5 pin to read and write select signal R/W, No. 6 pin enable signal E, 7 to 14 pins for

the three-state data bus DB0 ~ DB7 [2].

The design of RC0 ~ RC3 PIC16F877 and HD44780 data bus connected to the high four DB4 ~

DB7, a two-input eight-bit data; RC4 and HD44780 connected to the enable signal E; RC5 and

HD44780 connected to the RS, is used to select data register and the instruction register. Related

lead is connected through an interface J monitor.

Alarm Output Unit. Simulated using four-LC246 IC IC3 as an alarm sound alarm sound source, LC246 Manifold 8-pin plastic dual in-line hardware package, the pin functions: 1 oscillator input pin

OSC1, 2 feet oscillator output end OSC2, 1,2-pin external oscillator resistor; 3 feet for the second

election the sound side SEL2; 4 pin negative power supply VSS; 5 feet as an alarm signal output





terminal oUT; the first 6 feet of empty legs NC ; 7 pin positive power supply VDD; 8 feet is the first

election the sound side SEL1. When SEL2 then high, output short alarm sound; when SEL2 vacant,

SEL1 fire engine access high output sound, SEL1 low-level output when the ambulance sound,

SEL1 output is also vacant police car sound [3] (P21).

Because of this design is the PIC16F877A's RA4 pin drain output pin RA4 direct control LC246 with the negative terminal VSS; RA2 control LC246 with the sound side of SEL1 election; RA3

control LC246 with the sound side of SEL2 election. LC246 output OUT through a resistor R33

control transistor Q5, the alarm sounds sent through the interface Jsp speaker LS

Motor Drive Unit. The RA5 pin by the PIC16F877A connected transistor Q4 through resistor

R34 to the base, collector received Jmd interface, the interface through Jmd ZD on the motor, which

play a protective role of the diode D, LED DG1a detection device to lock in place to provide light,

light tube DG2a detection devices in place for the lock off to provide light.

Signal Detection Unit. Using PIC16F877A eight port D pins RD0 ~ RD7 enter the amount of

various types of testing, or by the reverse gate IC2 output terminal to generate a falling edge through

RB0/INT interrupt request to the CPU. RD0 to receive information about the local police, when JK mercury switches are turned on or photodiode light irradiation DU will enter high; RD1 indoor theft

alarm used to receive information through the optical isolator U3 device through the interface Jhm

and indoor Pirates of the police unit to contact; RD2 indoor burglary to receive information on the

device through the optical isolator U2 Jhm through the interface unit and indoor fire contact; RD3

U1 through the optical isolator for help with the interface Jhp and external buttons connected, easy to

to seek help information to the network; RD4 directly through the interface Jcg and photodiode

DG1b connected transmission lock in place information; RD5 directly through the interface Jcg and

photodiode DG2b connected, the transmission locks in place the relevant information; RD6 and RD7

for keyboard input, not repeat them.

Modem Unit. In order to achieve automatic networking and more, this design uses a

PIC16F877A's internal USART module serial communication, data transfer from the RC6, RC7 of the data receiver. In order to achieve the use of ordinary telephone lines and reliable transmission of

information, design a modem, as shown.

Data transmission: PIC16F877A pin RC6 output from the digital signal into the PNP type switch

the base of Q1, thereby keying the transistor Q2, the crystal oscillator Y, resistors R16~ R18 R21

and capacitor C1 ~ C6 oscillation composed device. When RC6 output low, transistor Q1 turns on,

the oscillator work, the capacitor C6 to the interface, J line transmission frequency information;

when RC6 output low, the transistor Q1 off, the oscillator stops, J line is no high-frequency

information. Thus the transmission of binary information. Thus the signal modulation.

Data reception: from Interface J line came through the modulation signal coupling capacitor C7 to

the base of transistor Q3 through the detection transistor Q3, resistor R22, R23 and capacitor C8 filtering, modulation of the signal has been restored. Demodulated signal directly to the serial port of

the receiver RC7, when, after receiving a message sent to the CPU interrupt request

Power Circuit. Main Power: 220V mains transformer reduced by 12V, send interface, Jac, by the

heap Dbr bridge rectifier, filter capacitor C11, the LM7805 regulator IC4 into the 5V DC power

supply to the main circuit. Standby Power: 4 AA 1.2V rechargeable batteries provide backup via the

interface Jdc.

To Control Program Flow





Figure 2. The main program flow

The Structural Characteristics of the Wall Embedded Safe

a) interior 24cm reinforced concrete box embedded within the wall, the wall surface and in the same

plane, covered with ornaments, no space, strong and good.

b) use of automatic electronic locks, the number of passwords over 10 billion combinations,

thieves can not decipher.

c) the use of bold multi Fangqiao Men bolt, bolt diameter 24-30mm, controlled by the agency

automatic.

d) the use of advanced membrane keypad, a waterproof, moisture-proof, wear-resistant

properties. e) facade using 3-5mm thickness cold rolled steel, doors and door frames with more closely.

f) the wrong code three times, vibration, flood, fire alarm.

g) The machine can provide LCD or LED display and alarm sound, between residential

Main program:(entry address:0X0000)

Port initialization;LCD display module

initialiation; Set the interrupt

Check the status flag

Police state?

Local police: police car soound; Indoor Alarm:

alarm; Fire alarm: fire engine sound; LCD

display alarm information; Transmit alarm

information to the network

Type the state?

1.Set :Two sets of power-on password can be set;

Can be set two alarm call; Set machine address

information 2.Passwoed: Correct Uniock and

disarm the alarm; Three times the wrong code

alarm

5s time to?

Listen on the network situation;

Send safety information

Y

Y

Y

N

N

N





properties and residents can monitor networking with each other. With mobile phones, telephone

networking alarm matched.

Conclusions

In this paper, wall safe micro-embedded advanced control system carried out a detailed design, the

design control procedures using Flash memory storage, automatic multi-machine network alarm,

control system design is simple and sensitive, safe to overcome the shortcomings of the past. The

common market with a variety of components, convenient operation, safe for the future development

of similar micro-control system to provide a reference

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wall embedding type high safe micro control system research

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