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Knock type tunnel lining defect detector
* The operation interface is simple and convenient, and all operations can be completed with just a thumb;
* Real-time data analysis, real-time detection results, and display with different color screens;
* Using statistical algorithm, the accuracy of test accuracy is good, and the objectivity is high;
* Multiple noise reduction modes, which can detect operations under ambient noise;
* Can modify the impact of percussion strength, small personal difference;
* Support contour plot;
* Easy to record, trace back, and reproduce the percussion sound;
* The test depth range is within 10 ~ 15cm.
Detection object: railway tunnel lining
Test content: Defects in the concrete surface
Knock type tunnel lining
Easy testing and
Provide traceability guarantee for inspection data
Test result graph
When hammering the surface of a concrete structure, vibrations are induced on the surface, which also compresses / tensifies the air to form sound waves. Therefore, the acoustic characteristics of the sound wave are closely related to the induced structural vibration characteristics. In general, the following changes occur in the vibration characteristics at the place where the void occurs:
(1) The bending stiffness is significantly reduced, and the excellent period is increased;
(2) The dissipation of elastic wave energy becomes slower, and the duration of vibration becomes longer.
Detection principle and method
Product platform: mobile terminal platform
Operating system: Android
Test Category: Surface defects of tunnel lining
Test method: sound method
Test indicators: excellent period of vibration, duration, etc.
Excitation device: handheld vibration hammer, adjustable vibration rod
Data analysis: Combined with PC system, draw test plan