Title:
LOAD DETECTOR
Document Type and Number:
Japanese Patent JPS63145931
Kind Code:
A
Abstract:
PURPOSE:To detect a correct load, by cancelling errors due to a difference in coefficient of linear expansion between elastic surface wave resonators. CONSTITUTION:One of two elastic surface wave resonators formed into a strain generating body is provided at an input side oscillation circuit B1 and the other thereof at a reference side oscillation circuit B2. Frequency signals of the circuits B1 and B2 are inputted into a computer (d) through frequency dividers S1 and S2 to cancel a deviation of resonance frequency due to a difference in coefficient of linear expansion between the two elastic surface wave resonators thereby enabling detection of a correct load.
Inventors:
NAITO KAZUFUMI
Application Number:
JP29303186A
Publication Date:
June 18, 1988
Filing Date:
December 09, 1986
Export Citation:
Assignee:
ISHIDA SCALE MFG CO LTD
International Classes:
G01L1/00; (IPC1-7): G01L1/00
Attorney, Agent or Firm:
Minoru Tsuji