Title:
ULTRASONIC AXIAL TENSION MEASURING METHOD AND DEVICE
Document Type and Number:
Japanese Patent JP3125491
Kind Code:
B2
Abstract:
PURPOSE: To accurately measure the axial tension of a bolt and to dispense with the precise processing accuracy of the bolt by using the scattered wave from the crystal grain boundary of the bolt.
CONSTITUTION: An ultrasonic axial tension measuring device is equipped with a pulser circuit 8 generating pulses for driving an ultrasonic sensor, the ultrasonic sensor 1 converting the pulses to ultrasonic waves to propagate them through an object to be measured and converting the ultrasonic waves reflected by the end surface of a bolt 6 to an electric signal to output the same and a microcomputer 13 measuring the axial tension acting on the bolt 6 on the basis of an output waveform. The microcomputer 13 calculates the shift of the scattered waveform from the crystal grain boundary of the bolt 6 when no axial tension acts on the bolt 6 and the scattered waveform from the crystal grain boundary of the bolt 6 when axial tension acts on the bolt 6 and measures the axial tension acting on the bolt 6 on the basis of the calculated shift.
Inventors:
Naomi Sawada
Application Number:
JP34344592A
Publication Date:
January 15, 2001
Filing Date:
November 30, 1992
Export Citation:
Assignee:
Suzuki Motor Corporation
International Classes:
G01L5/00; G01L1/00; G01N29/00; (IPC1-7): G01L5/00; G01L1/00; G01N29/00
Domestic Patent References:
| JP4166733A | ||||
| JP3209139A | ||||
| JP6373937A | ||||
| JP60181649A | ||||
| JP5788333A | ||||
| JP450650A |
Attorney, Agent or Firm:
Isamu Takahashi