Title:
POSTURE ANGLE DETECTOR
Document Type and Number:
Japanese Patent JPH0231108
Kind Code:
A
Abstract:
PURPOSE:To provide a small-sized inexpensive long life posture angle detector enhanced in reliability by providing an integration circuit, a differentiation circuit and a subtractor. CONSTITUTION:An average value circuit 3 integrates a posture angle signal thetato calculate an average value and also performs operational processing to output an angle error signal C. This signal C gradually approaches the center of vibration of the signal theta with the elapse of time T and almost coincides with an offset error DELTAtheta after the elapse of a time TM sufficiently longer than a shaking cycle T0. Next, the signal C is converted to the angular velocity error signal D corresponding to an angle detection signal B by a differentiation circuit 4 to be inputted to a subtractor 5. Further, the subtractor 5 subtracts the signal D from the signal B to input an angular velocity detection signal wherein the error DELTAtheta is corrected to an integration circuit 2. Therefore, the error DELTAtheta is gradually corrected in the signal theta outputted from the circuit 2 and a waveform corrected almost perfectly is obtained after the elapse of the time TM. Even when a drift error is generated in an angular velocity sensor 1 and the circuit 2, since the circuits 3, 4 feed back the signal D, the signal thetais automatically corrected and a waveform containing no error DELTAtheta is obtained.
Inventors:
WATABE HIROSHI
SHIOZAWA YOSHIAKI
SHIOZAWA YOSHIAKI
Application Number:
JP17913788A
Publication Date:
February 01, 1990
Filing Date:
July 20, 1988
Export Citation:
Assignee:
TAMAGAWA SEIKI CO LTD
International Classes:
G01C19/00; B64D43/00; G01C21/16; (IPC1-7): B64D43/00; G01C19/00; G01C21/16
Attorney, Agent or Firm:
Mitsuteru Soga (4 outside)
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