A Novel Ultrasonic Ranging System Based on the Self-correlation of Pseudo-random Sequence
A novel ultrasonic ranging system based on the self-correlation of pseudo-random sequence is designed in this paper. Modular design is applied in this ultrasonic ranging system, which can measure the ultrasonic propagation velocity and transit time accurately, and then calculates the obstacles distance. Low power consumption and high performance TMS320VC5509A DSP is used as the ultrasonic ranging systems signal processor. In order to improve the correlation calculations real-time performance, correlation judgment algorithm based on FFT is adopted. The ultrasonic receiving circuit is improved by absolute-value circuit instead of the traditional detection circuit, which effectively demodulates the pseudo-random sequences from the received ultrasonic waves. An error correction algorithm for this ultrasonic ranging system is proposed. The ultrasonic ranging systems performance test was conducted under the interference existed environment. The experimental results demonstrate that the ultrasonic ranging system has good anti-interference performance and its ranging errors are within 1.8％.
ZHAO Xiaochuan LUO Qingsheng HAN Baoling LI Xiyu
School of Mechanical-electronic Engineering,Beijing Institute of Technology,Beijing,100081,China School of Mechanical and Vehicular Engineering,Beijing Institute of Technology,Beijing,100081,China
国际会议
2009 IEEE International Conference on Information and Automation(2009年 IEEE信息与自动化国际学术会议)
珠海、澳门
英文
1124-1128
2009-06-22（万方平台首次上网日期，不代表论文的发表时间）