Low cost ultrasonic sensors for tele-operated vehicles.
Source: Sensor Review 20(3):227-34.
Abstract: A low-cost ultrasonic ranging system, which can be relied upon to assist in navigating a powered wheelchair, is presented. Algorithms have been developed for detection and implemented on a microcontroller based unique system appropriate for a tele-operated vehicle. The gradient of the echo envelope used for detection. The noise and inconsistencies in the detection circuitry are reduced in this system. Several sensors work independently in the sensor array to allow the system to gather separate sets of range information at a fast pace. The new system, with these sets overlaid on to a 2D grid array, is inexpensive and easy to use in comparison with the other systems. (CIRRIE Abstract)
Institution: Dept. of Mech. & Manuf. Eng., Portsmouth Univ., UK