16 August 2001 MEMS high-speed angular-position sensing system with rf wireless transmission
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A novel surface-micromachined non-contact high-speed angular-position sensor with total surface area under 4mm2 was developed using the Multi-User MEMS Processes (MUMPs) and integrated with a commercial RF transmitter at 433MHz carrier frequency for wireless signal detection. Currently, a 2.3 MHz internal clock of our data acquisition system and a sensor design with a 13mg seismic mass is sufficient to provide visual observation of a clear sinusoidal response wirelessly generated by the piezoresistive angular-position sensing system within speed range of 180 rpm to around 1000 rpm. Experimental results showed that the oscillation frequency and amplitude are related to the input angular frequency of the rotation disk and the tilt angle of the rotation axis, respectively. These important results could provide groundwork for MEMS researchers to estimate how gravity influences structural properties of MEMS devices under different circumstances.
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Winston Sun, Winston Sun, Wen Jung Li, Wen Jung Li, } "MEMS high-speed angular-position sensing system with rf wireless transmission", Proc. SPIE 4334, Smart Structures and Materials 2001: Smart Electronics and MEMS, (16 August 2001); doi: 10.1117/12.436607; https://doi.org/10.1117/12.436607

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