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Sound concentrator for enhancing ultrasonic detection distance

A technology of detection distance and sound concentrator, which is applied in the field of ultrasonic detection, can solve problems such as increasing the emission time, increasing after-vibration, and detecting far, and achieves the effect of increasing the detection distance and reducing the volume

Pending Publication Date: 2021-01-12
成都英萨传感技术研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to detect a longer distance with ultrasonic waves, the general method is to increase the transmitting and receiving response of the transducer, and reduce the angle at the same time. It is necessary to increase the cross-sectional area of ​​the transducer. This effect is generally not ideal, and increasing the emission will increase After vibration, the blind area increases, so the ultrasonic range finder with small size, long detection, small angle and small blind area is in increasing demand, especially some intelligent and unmanned detection equipment in industry

Method used

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  • Sound concentrator for enhancing ultrasonic detection distance
  • Sound concentrator for enhancing ultrasonic detection distance
  • Sound concentrator for enhancing ultrasonic detection distance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] The front of the ultrasonic emission is selected as the detection range, image 3 Shown is the ultrasonic sound pressure-frequency diagram at 4cm in front of the piezoelectric transducer. image 3 It can be seen that the piezoelectric transducer emits strongly around 40 kHz, and this embodiment selects a piezoelectric transducer that emits 40 kHz ultrasonic waves.

[0049] This embodiment uses the comsol simulation software to simulate the present invention.

[0050] Step 1: Acoustic condenser and its optimization modeling:

[0051] Choose New from the File menu.

[0052] In the New window, click Model Wizard.

[0053] Model Wizard

[0054] In the Model Wizard window, click 2D Axisymmetric.

[0055] In the Select Physics tree select Acoustics > Acoustic-Structure Interaction > Acoustic-Piezoelectric Interaction, Frequency Domain.

[0056] Click Add.

[0057] Click Research.

[0058] Select General Studies > Frequency in Select Number of Studies.

[0059] Click ...

Embodiment 2

[0258] On the basis of the above example, a piezoelectric transducer that generates 200kHz ultrasonic waves is selected, and the first default plot in the simulation is sound pressure Figure 10 ,exist Figure 10 Between point F and point G is a convex deformation part, between point G and point H is a concave deformation part, between point H and point I is a convex deformation part. The vertical height of the condenser body is 2.1 cm, which is 12 times the wavelength at this time. The angle between FJ and the vertical line is 19 degrees.

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PUM

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Abstract

The invention discloses a sound concentrator for enhancing ultrasonic detection distance, and the sound concentrator is installed on a piezoelectric transducer for generating ultrasonic waves, and thesound concentrator comprises a sound concentrator body and a sound concentrator connecting part; the configuration of the sound concentrator body is from the side surface deformation of a circular truncated cone: the positions and sizes of two bottom surfaces of the circular truncated cone are not changed, a bus of the circular truncated cone is taken, the intersection point of the bus and the small-area bottom surface of the circular truncated cone is A, the intersection point of the bus and the large-area bottom surface of the circular truncated cone is B, wherein the positions of A and B are not changed; from A to B, the deformation of the line segments recessed towards the interior of the circular truncated cone and protruding towards the exterior of the circular truncated cone alternately occurs to form continuous curves AB, at least one concave function and one convex function exist between the curves AB after the line segments AB are deformed, and the deformed curves AB are generatrixes of the sound concentrator body; the bottom surface with a small area of the sound concentrator body is connected with a sound concentrator connecting part with the same inner diameter as thebottom surface, and the sound concentrator connecting part is connected with the piezoelectric transducer. The ultrasonic detection distance is effectively increased.

Description

technical field [0001] The invention relates to the field of ultrasonic detection, in particular to a sound concentrator for enhancing the ultrasonic detection distance. Background technique [0002] At present, the field of ultrasonic detection is more and more widely used. The ultrasonic penetrating ability is strong, and the detection depth can reach several meters; the sensitivity is high, and reflectors equivalent to the air gap with a diameter of about a few tenths of millimeters can be found; The orientation, size, shape and nature of the reflector are relatively accurate; only one side is required to approach the object to be inspected; defect inspection results can be provided immediately. [0003] Piezoelectric transducers can be used to convert electrical current into an acoustic pressure field and vice versa to generate electrical current through an acoustic field. Typically, such devices are used to generate ultrasonic waves in air and liquids. In order to det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/22G01N29/04
CPCG01N29/221G01N29/04
Inventor 刘柯江李东杰李浩李铭
Owner 成都英萨传感技术研究有限公司