Title:
【発明の名称】同軸共振空洞を使用した線形位置センサー
Document Type and Number:
Japanese Patent JPH07502338
Kind Code:
A
Abstract:
An apparatus (102) is adapted to detect the linear extension (position), velocity and acceleration of a hydraulic cylinder (108). The hydraulic cylinder (108) defines a variable lenght coaxial resonant cavity (112). Under the control of a controller (228), an RF transmitting section (114) and an RF receiving section (116) are used to determine the resonant frequency of the cavity. The resonant frequency of the cavity (112) is determined by comparing a received signal with a threshold and detecting slope intercept conditions.
Inventors:
Bitter Ali Ay
Bowman Charles Wayne
Morgan Denny Edward
Bowman Charles Wayne
Morgan Denny Edward
Application Number:
JP50274892A
Publication Date:
March 09, 1995
Filing Date:
December 23, 1991
Export Citation:
Assignee:
CATERPILLAR INCORPORATED
International Classes:
F15B15/28; G01B15/00; G01D5/48; G01P3/48; (IPC1-7): G01B15/00; F15B15/28; G01D5/48; G01P3/48
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)