Transverse and longitudinal ultrasonic sensor for detecting axial pre-stress of bolt

An ultrasonic sensor and axial pre-tightening technology, which can be used to measure torque/torsion force, instrument, measurement force and other directions during tightening, can solve problems such as large measurement error, single excitation waveform mode, and inconsistent thickness of coupling layer

Inactive Publication Date: 2013-01-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to provide a transverse and longitudinal wave ultrasonic sensor for bolt axial pre-tightening stress detection, which is mainly aimed at the single excitation wavef

Method used

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  • Transverse and longitudinal ultrasonic sensor for detecting axial pre-stress of bolt

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Embodiment Construction

[0011] The specific embodiment of the present invention is described in detail below:

[0012] figure 1 In the process, the sound-absorbing material 8 is wrapped around the periphery of the transverse wave crystal oscillator cylinder 6 and stuffed into the longitudinal wave crystal oscillator ring 7, and the wires 3 are respectively welded to one side of the transverse wave crystal oscillator cylinder 6 and the longitudinal wave crystal oscillator ring 7 and connected to the housing 1 respectively. On the L5 joint 2 on the top, wrap the shock-absorbing material 8 on the outside of the longitudinal wave crystal oscillator ring 7 and fill it with the backing material 4, and put the magnetic steel 10 on the periphery of the shock-absorbing material 8 to form the inner core of the sensor. Attach the protective film 11 to the bottom surface of the screw cap 9 and screw it tightly on the shell 1, and tightly compress the assembled inner core inside the shell 1 to make a transverse a...

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Abstract

The invention relates to a transverse and longitudinal ultrasonic sensor for detecting axial pre-stress of a bolt. The ultrasonic sensor which is designed into a concentric ring nested structure and can excite transverse and longitudinal wave signals synchronously or asynchronously is provided to mainly solve the problem that a traditional ultrasonic sensor cannot excite the transverse and longitudinal wave signals synchronously or asynchronously and can be easily limited and affected by operation or test conditions of testing staff so as to cause inconsistency of thickness of a coupling layer and a relatively large measurement error; a magnet steel is arranged inside the sensor, so that the sensor can be conveniently absorbed on any ferromagnetic part to be tested, operations can be simplified, the stability of the thickness of the coupling layer can be guaranteed, and the measurement error can be reduced, therefore, the transverse and longitudinal ultrasonic sensor can be widely applied to the application field of ultrasonic non-destructive detections.

Description

1. Technical field [0001] The invention relates to a transverse and longitudinal wave ultrasonic sensor for detecting the axial pretightening stress of bolts, which is mainly used in the field of ultrasonic non-destructive testing. The device is small in size, can excite ultrasonic transverse wave and longitudinal wave simultaneously or in time-sharing, and the probe is equipped with a magnetic adsorption device, which solves the problem of inconsistent thickness of the coupling layer caused by the hand shake of the sensor in ultrasonic nondestructive testing, and fills a sensor Simultaneous or time-sharing excitation of the two waveforms of transverse wave and longitudinal wave is blank, which can meet the application of ultrasonic nondestructive testing tasks under special conditions. 2. Background technology [0002] There are two main types of traditional ultrasonic excitation sensors, one is a transverse wave sensor that uses a transverse wave waveform as an excitation;...

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Application Information

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IPC IPC(8): G01L1/25G01L5/24
Inventor 徐春广李骁潘勤学任慧玲肖定国徐浪郭军宋文涛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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