Title: Apparatus for measuring distance with high accuracy
Application Number: 200310102312 Application Date: 2003.10.24
Publication Number: 1609553 Publication Date: 2005.04.27
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01C3/08,G01S17/10,G04F10/06
Applicant(s) Name: Asia Optical Co., Ltd. Address:
Inventor(s) Name: Jian Biyao, Huang Dong
Attorney & Agent: wan huatang
Abstract:
     The present invention is one high precision range finder comprising light source, light receiver, multifrequency signal generator module, the first measuring module, the second measuring module and CPU. The multifrequency signal generator module generates several frequencies for the light source, the light receiver, the first measuring module and the second measuring module separately; the light receiver with frequency mixing function mixes the frequency of pulse light beam the target reflects and that from the multifrequency signal generator module; the two measuring modules provide the flying time and phase difference of the pulse light beam between the range finder and the target; and the CPU calculates the range from the range finder to the target based on the time and the phase difference.
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