Title: Linear position sensor with equalizing means
Application Number: 93118882 Application Date: 1993.10.23
Publication Number: 1102253 Publication Date: 1995.05.03
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: F15B15/28,G01B7/02
Applicant(s) Name: Caterpillar Inc. Address:
Inventor(s) Name:
Attorney & Agent: ZHANG MINHUA
Abstract:
     The present invention relates to a linear position sensor with equilizing device. Said device can detect the linear extension length, speed and acceleration of hydraulic cylinder. Said hydraulic cylinder forms a variable-length coaxial resonant cavity. Under the condition of control of a controller, a radio emission portion and a radio receiving portion are used for determining resonance frequency of said cavity. Said receiving portion includes a comparator circuit used for raising sensitivity of said sensor and removing false detection of resonance frequency of hydraulic cylinder, and the linear extension length of the hydraulic cylinder is determined as the function of resonance frequency.
Time: 6