A 32x32 visual motion sensor based on the time stamped pixel structure is proposed. The sensor pixel is formed by a time stamp component and a compact spatial based edge detector with a pixel size of 70x70μm2 in standard 0.35μm CMOS process. It measures up to 6000 degree/s with focal length f = 10mm. Less than 5% rms variation for middle range velocity measurement and less than 10% rms variation for high and low velocity measurement have been achieved. This structure is good for scaling down with new fabrication processes to implement large scale 2D arrays with low power consumption in the near future.
To improve the sensitivity of our laser radar system, we provided a set of control method for APDs (Avalanched Photodiodes) based on single-chip computer together with the circuits dealing with noise and temperature. It adjusts the voltages intelligently and maintains the APD's optimal working status.
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