Digital telemetries

Giacintec / T.C.E.

What is digital ?

Digital means encoding,

There are several types of encoding,

Most evident is RS 232 or RS 422 but

Who is familiar to PCM encoding ?

At least, telemetry specialists

Here is our understanding of digital

Digital ?

The analogic signal is converted in digital signal.For a single channel it is a simple message that can be recognized at the end of the process.Nothing is simple in telemetry and encoding is the most complicated part of telemetry.

Why encoding is a hard time ?

Transfering a measurement into digital or ‘ word ‘ message is complicated, measurement has to be accurate and free of noise and spurious signals before being translated into a ‘ word ‘ or binary signal.

Most common translation is from analogic into RS 232 message.

This is the better and the worst : RS 232 is convenient for computers but will not offer, unless slow messages are concerned, a good measurement solution.

Our Microtrad / Profiltemp

A transmitter !

The transmitter as 6 inputs, 5 are usualy dedicated to measurements and one is left for battery voltage.

Conditionners are shaping each measurement in acceptable voltage, then these are switched in digital to fit on a kind of RS message

Rx Receivers

At reception, Receiver is built to receive one or two transmitters, one or two RS signals will be at the output of the receiver for a processing on a computer.

Receiver is a stand alone unit, as on the picture, the black unit and is connected one to the antenna and the other to the computer

Programming

Sequence, time and so on are to be programmed in factory ( in some cases at user’s place ).

The sequence will include two to four lines and will tell the channel for each on the 5 data for each of the 4 lines.

A sequence will then be of 20 data all together.

Sequence is transmitted from 1 to 12.5 ms up to 86 ms

Softwares

Data are transmitted in ASCII format and can be used any way from there.

A software has been developped for users.

Mutrad

Mutrad is quite basic to offer adjustments, reading, motions display in engineering units.

Mutrad will make the connection, easily with the computer and help users to get data right away.

We suggest to develop on proprietary softwares the adaptated processing for each specific applications, knowing any one can start up from Mutrad.

Applications

From glass to freezing tunnels

Measurement for glass processing, steel processing, cooking, baking, cooling in several industries …

Freezing process for food, chemicals, pharmaceutical and others

Flex products needs flex transmitters

The flex transmitter was designed for flat metal sheets processing.

The digital RS telemetry concept has been transposed to follow parameters on flat sheets of steel during processing. Telemetry transmitter is bending as well as the metal plate.

Most of the RS applications

Are dedicated to temperatures

But hygrometers, pressures sensors, gaz detections belong to the experience gained during implementations of systems.

Our efforts, today, are dedicated to new applications.

PCM Telemetry

EncodingPAM : Pulse Amplitude Modulation

PDM : Pulse Duration Modulation

PPM : Pulse Position Modulation

PFM : Pulse Frequency Modulation

PCM is a lot more tricky

PCM codes

The frame

Includes a Biø-L a NRZ-L and a clock messages.

With a 1 MBp/s, the complete message, synchronized and dated with a PDM clock, is transmitted.

Number of channels is from 6 to 48.

PCM signal goes from 15 to 1000 Kbit/s

Our PCM Encoder

Simple but efficient

The encoder is in full package with space left for conditionners and transmitter

Demodulation

From receiver, with a simple plug in card for computer and a strong software.

User will process data

PCM message is demodulated after its reception, then is feeding a specific card inserted into a computer to process data and supply results as tables, motions, bargraphs and others.

Issued from Military, aeronautics and space business, this type of telemetry remain expensive but really efficient.

Power supply

The real challenge !

Types of aboard power supplies differs depending upon application, We are using Lithium, Lithium Chloride, Lythium Polymer and others depending upon duration, temperature and so on

Applications

Industrials but also :

R.P.V, Gimballs, Helicopter rotors, large nuclear fans, stell process and much more

Our target

Success of measurements.

All our designs come from technologies aged to perfection and improved because of applications.

Customer’s satisfaction is our satisfation.

Giacintec / T.C.E.

Your partner !

The end