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Interface Design, Communications, Data Acquisition

communications design uk

We have extensive experience in communications design for UK companies, digital processing, interface design, remote data acquisition and related applications. We have developed low cost, low power PSTN remote modem (V22) telemetry systems, powerline communications systems, 3G remote data loggers, multidrop LAN networks, RS232 / RS485 interfaces, fieldbus, CAN BUS, PROFIBUS, serial / parallel computer port interface applications, USB and low cost Profibus DP slave field bus node.

Remote data acquisition
Design of complete public utility remote data acquisition system using RF packet network and V22 PSTN network. Unit also utilises 1/4 VGA display and database user technology. This allows dial up acquisition in a matter of seconds. The modem is designed using state of the art low power technology.

Profibus / fieldbus
We have developed 'profibus' slave instrumentation systems for high speed industrial monitoring and control. This low cost equipment can be added to almost any industrial system.

Interface designinterface design
Design experience includes RS232, 485, 422, USB, fieldbus, CAN OPEN & IEEE GPIB. We have also developed multidrop LAN networks and have designed protocols using checksums, CRC's and GPRS.

Global positioning systems & data logging
We have designed GPS systems, data logging and related applications.

GSM
Here at MLE, we have been involved in test equipment development for the monitoring of voice quality in GSM transmissions using multiple receivers & multiplexed SIM arrays, voice clips & digital tones being measured for clarity & noise.

Pseudo random generator and receiver
We designed the software for generating and receiving pseudo random bitstreams operating at 64khz. One PIC16C55 running at 20 MHz generates one of five different pseudo random sequences under the control of an 8751 processor. A second PIC16C55 also under the control of the same 8751 is used to detect the presence of the selected incoming signal, to lock to it if below a certain error count and then to count errors during the transmission. Compact code and the fast execution of the PIC allow this to all take place within the 64KHz period of 15uS (only 75 instructions). All five sequences can be placed into the 512 bytes of ROM contained in the PIC16C55. These units are in use today testing the integrity of digital transmission links.

Remote instrument node for offshore strain gauge and measurement
Embedded FPGA logic and an 8051 micro-controller are used to provide a control interface between specialist strain gauges, analogue sensing circuitry and a DSP host monitoring system. Designed to be used in intrinsically safe environments.

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