In-hole cavity monitoring device and method based on multi-frequency ultrasonic scanning

A multi-frequency ultrasonic and detection device technology, which is applied in measurement devices, processing response signals of detection, and material analysis using sonic/ultrasonic/infrasonic waves, which can solve problems such as poor detection accuracy and limited detection range.
CN106950288AActive Publication Date: 2017-07-14INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
Publication Date
2017-07-14

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Abstract

The invention discloses an in-hole cavity monitoring device and method based on multi-frequency ultrasonic scanning. The in-hole cavity monitoring device comprises a rotary driving component, an orientation component, a scanning component, a calibrating component and a reflection component. The invention further discloses an in-hole cavity monitoring method based on multi-frequency ultrasonic scanning, and aims to solve the problems of limit and low accuracy in a single-frequency ultrasonic detection range. Clear waveforms generated by selecting ultrasonic energy converters of two frequencies are comparatively analyzed in order to calculate the number of periods of ultrasonic pulse leak detection respectively, so that the transmission time detection accuracy is increased; meanwhile, the calibrating component and the reflection component are adopted in order to measure a sound speed in an environmental medium to realize high-accuracy measurement of a wave speed; lastly, distance values measured by the ultrasonic energy converters of two frequencies are averaged to obtain an accurate distance. The in-hole cavity monitoring device and method have the advantages of skillful design, strict concept, simple structural system, and easiness in implementation.
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Description

technical field

[0001] The present invention relates to the field of geotechnical measurement devices, in particular to a detection device for voids in holes based on multi-frequency ultrasonic scanning, and also relates to a detection method for voids in holes based on multi-frequency ultrasonic scanning, which is applicable to various engineering fields Carry out detailed survey and detection of voids in geological boreholes, obtain fine geological structure and contour information of voids, and realize accurate detection of voids of various sizes within the range without blind spots. Background technique

[0002] With the rapid development of my country's society and economy, the demand for mineral resources has increased sharply. my country has entered the stage of large-scale development of mineral resources and most of them are underground mining. Underground mining of mineral resources will inevitably form a large number of goafs, and the goafs may cause large-scale u...

Claims

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