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Firmware development for the fibre-optic seismometer based on FOG

Kamiński Marek, Tylman Wojciech, Jabłoński Grzegorz, Kotas Rafał, Amrozik Piotr, Sakowicz Bartosz, Jaroszewicz Leszek R.

Opto-Electronics Review

2024

Vol. 32, No. 2

art. no. e150179

The main goal of the article is to present the concept of using a simulation environment when designing an advanced fibre-optic seismometer (FOS) using a field-programmable gate array (FPGA) computing system. The first part of the article presents the advanced requirements regarding the FOS principle of operation, as well as the measurement method using a closed-loop operation. The closed-loop control algorithm is developed using the high-level language C++ and then it is synthesised into an FPGA. The following part of the article describes the simulation environment developed to test the operation of the control algorithm. The environment includes a model of components of the measurement system, delays, and distortions in the signal processing path, and some of the measurement system surroundings. The article ends with a comparison of simulation data with measurements. The obtained results are consistent and prove correctness of the methodology adopted by the authors.

Capacitive MEMS accelerometer with apen-loop switched-capacitor readout circuit

Szermer Michał, Amrozik Piotr, Zając Piotr, Maj Cezary, Napieralski Andrzej

International Journal of Microelectronics and Computer Science

2018

Vol. 9, nr 4

142--148

MEMS are one of the fastest developing branch in microelectronics. Many integrated sensors are widely used in smart devices i.e. smartphones, and specialized systems like medical equipment. In the paper we present the main parts of a system for measuring human movement which can be used in human balance disorder diagnosis. We describe our design of capacitive accelerometers and dedicated switched capacitor readout circuit. Both will be manufactured as separate chips in different technological processes. The principle of operation, schematics and layouts of all parts of the system are presented. Preliminary simulations show that the proposed designs are applicable for the considered medical device.