Simple motion detection circuits and system for mobile robot based on biological vision system

Abstract

We proposed in this study simple motion detection circuit and system based on the biological vision system. The system is constructed with the hardware (circuits) and software (microcomputer). The array of the analog-digital circuits based on the retina was utilized as the pre-processor. The system can detect the movement direction by using the microcomputer. The test circuit was fabricated by discrete metal oxide semiconductor (MOS) transistors on the breadboard. The measured results of the fabricated circuit showed that the circuit can output the pulsed voltage (motion signal) when an object moves on the circuit. The test circuit was connected with the microcomputer introduced in the mobile robot. It was clarified that the proposed system can detect the movement direction of the object. In the future, we can be expected to achieve new compact motion detection sensor by using the proposed circuit and system.

Real-Time Analog Pixel-to-Pixel Dynamic Frame Differencing with Memristive Sensing Circuits

“…The proposed analog domain signal processing near sensor system uses fewer number of circuit components in comparing to similar digital and mixed signal solutions for motion detection [10], [11], [12]; the number of transistors and complexity of the circuits in the proposed analog design is significantly reduced. One of the main application of the proposed system is the background subtraction in analog domain near to the sensor, reducing the need to have complex designs for ADC, digital memory array and control circuits.…”