Non-contact collecting probe

A concentrated, non-contact technology, used in the generation of ultrasonic/sonic/infrasonic waves, measurement devices, instruments, etc., to solve the problems that the signal cannot reach the deep layer of the model, affect the excitation effect, and damage.

Active Publication Date: 2012-12-12
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

[0011] Existing ultrasonic detection methods have certain shortcomings and limitations when used for geological model detection
[0012] ① Piezoelectric ultrasonic probes are relatively simple and low in price, but when performing geological model testing, there will be some problems when using piezoelectric probes for transmission and reception
The damage of this point will affect the next excitation effect at this point
When performing physical model detection, it is required to emit ultrasonic signa

Method used

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Embodiment Construction

[0032] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0033] A non-contact focusing probe is designed as shown in Figure 2. Figure 2 shows the overall view of the non-contact focusing probe in a non-working state. It has a concave front and a convex back. The arc-shaped base 2- 3 is flexible, on the back side of the substrate 2-3 (such as Figure 2-1 As shown) a plurality of piezoelectric ceramics (high-performance PZT) 2-1 are pasted, and the polarization direction of each piezoelectric ceramic 2-1 is along the thickness direction, that is, the normal direction of the arc-shaped substrate 2-3. When an electric field along the polarization direction is applied to the piezoelectric ceramic 2-1, the d31 effect of the piezoelectric ceramic 2-1 can first generate a displacement response along the tangential direction in the piezoelectric ceramic 2-1, so that the electric energy can be effectively converted into mechanical e...

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Abstract

The invention provides a non-contact collecting probe and belongs to the field of ultrasonic vibration detection. The non-contact collecting probe comprises a base and piezoelectric ceramic. The base is in an elastic arc structure with concave front and convex back. The piezoelectric ceramic is adhered to the back of the arc base, and a polarization direction of the piezoelectric ceramic is along through-thickness direction of the base, namely normal direction of the base. By the aid of the non-contact collecting probe, an emitting point medium is never damaged, and nondestructive testing is achieved. The non-contact collecting probe is a non-contact emission source, an emitter is not lifted or lowered at the moving position, and accordingly production efficiency of the non-contact collecting probe is high. A focus of the non-contact collecting probe on a model can be diminished to 0.2mm by focusing, the requirement for scaling down of a field focus is met, and simulation is more vivid.

Description

technical field [0001] The invention belongs to the field of ultrasonic vibration detection, in particular to a non-contact aggregation probe. Background technique [0002] Earthquake physical simulation research refers to the use of physical models to study earthquakes and related phenomena (especially fluctuation phenomena). It is an important part of experimental geology, also known as model geology. The most commonly used method in model geology studies is the ultrasonic method, and is therefore often referred to as ultrasonic seismic modeling. Ultrasonic seismic physical model experiments conduct indoor simulation observations of the propagation of seismic waves in various complex geological bodies through the observation of ultrasonic propagation in geological models, and conduct seismological research based on the observation results. It explains and solves many practical problems in geophysical exploration, thus greatly promoting the development of seismological the...

Claims

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Application Information

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IPC IPC(8): G01H9/00G01N29/34
Inventor 宗遐龄陈超王辉明王跃郝守玲
Owner CHINA PETROLEUM & CHEM CORP
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