ET Project

Employer project, Technical solutions

The ET (external trigger) system was developed for DPA Cauberg-Huygen to work in conjunction with their Syscom MR2000 and MR3000 vibration monitoring systems. The ET system allows for the Syscom devices to be triggered wirelessly when a train passes by the ET sender. This project took about 4 months of development time.

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The ET system works based on an ATMEL chip detecting vibrations in the ground with an accelerometer. The sender unit then transmits a trigger signal via 868MHz radio signals. The receiver units can then trigger the Syscom devices. The devices can be powered via USB or on their build in power packs which last for about 32 days.

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In order to configure the sender unit of the ET system I made a piece of software that allows the user to set its trigger values and trigger time via Bluetooth. The software also shows real time data from the accelerometer and features a ruler to finetune the trigger settings. It also shows battery level and firmware currently running on the ET sender unit.