Safety obstacle avoidance mobile robot is one of the basic problem. http://www.siliconray.com/stc-8051-standard-kit.htmlThe obstacle and robots get is the distance between the safety of obstacle avoidance premise, ultrasonic sensor with its information processing simple, inexpensive and easy to implement hardware etc, and is widely used as range-finding sensors. The ultrasonic ranging system chooses the SensComp company produces the Polaroid 6500 series ultrasonic distance module and 600 series sensor, microprocessor using ATMEL company AT89C51. In this paper, this ultrasonic ranging system to carry on the detailed analysis and introduce.
1, ultrasonic sensors and metering distance principle
Ultrasonic frequency is higher than 20 KHz to wave of [1]. In order to use the ultrasonic as detection means, must produce super living wave and receive ultrasonic. Complete this function is the device
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