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Non-immersive liquid-level measurement sensor and installation and application method thereof

A liquid level measurement and sensor technology, which is used in measurement devices, liquid/fluid solid measurement, liquid level indicators, etc. Simple, easy to re-use, quick and easy to install effects

Inactive Publication Date: 2017-02-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the installation and operation of current sensors of this type are relatively complicated, the reusability rate is very low, and the measurement accuracy needs to be improved.

Method used

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  • Non-immersive liquid-level measurement sensor and installation and application method thereof
  • Non-immersive liquid-level measurement sensor and installation and application method thereof
  • Non-immersive liquid-level measurement sensor and installation and application method thereof

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Embodiment 1

[0049] The present invention provides a non-immersed liquid level measurement sensor based on ultrasonic guided waves - thin active piezoelectric sensors (piezoelectric wafer active sensors, referred to as PWAS), such as figure 1 shown. PWAS sensors are small in size and light in weight, and are easy to integrate with the structure to be measured (pasted on the surface of the structure or embedded inside the structure). The working principle of PWAS is based on piezoelectric effect and inverse piezoelectric effect. PWAS in plane x 1 x 2 direction dimension is much larger than its plane x 1 x 3 Dimensions in direction, using piezoelectric coupling d 31 The coupling of mechanical parameters and electrical parameters is realized to realize the effective excitation and reception of ultrasonic guided waves. The coupling between the PWAS and the plate is in-plane coupling at the edge of the PWAS. When the PWAS is adhered to the surface of a thin-walled plate, the thickness of ...

Embodiment 2

[0067] The present invention provides a non-immersive liquid level measurement sensor based on ultrasonic guided waves - a thin active piezoelectric sensor (PWAS), such as figure 1 shown. The present invention will be further described with experimental cases below in conjunction with the accompanying drawings and specific implementation methods.

[0068] The PWAS described in the present invention utilizes piezoelectric coupling d 31 Realize the coupling of mechanical parameters and electrical parameters, in the plane x 1 x 2 direction dimension is much larger than its plane x 1 x 3 Dimensions in the direction to achieve effective excitation and reception of guided waves, such as figure 1 shown.

[0069] After the PWAS of the present invention sticks to the thin-walled plate surface, as figure 2 Shown, through the coupling of in-plane motion.

[0070] When the PWAS described in the present invention is pasted on the surface of the structure, the thickness of the adhe...

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Abstract

The invention belongs to the technical field of non-destructive detection technology and measurement, and particularly relates to a non-immersive liquid-level measurement sensor based on ultrasonic guided wave and its installation and application method. The working principle of PWAS (a thin piezoelectric wafer active sensors) is based on the piezoelectric effect and the inverse piezoelectric effect. The size of PWAS in the plane x1x2 direction is much larger than its size in the plane x1x3 direction, by means of piezoelectric coupling d31, coupling of mechanical parameters and electrical parameters can be achieved in order to achieve the effective excitation and reception of ultrasonic guided waves. The coupling of PWAS and the plate is the in-plane coupling at the edge of the PWAS. When the PWAS sticks to the surface of the thin-walled plate, the adhesive layer is extremely thin. Through the coupling of the in-plane motion, the PWAS edge can be effectively stimulated or receive the Lamb waves.

Description

technical field [0001] The invention belongs to the field of non-destructive detection technology and measurement technology, and in particular relates to a non-immersed liquid level measurement sensor based on ultrasonic guided waves and an installation and application method thereof. Background technique [0002] Ultrasonic guided wave is an elastic wave propagating along a waveguide (slab or pipe), which has low energy consumption, high sensitivity, and the ability to propagate over long distances. Ultrasonic guided waves have multimodal and dispersive properties. Dispersion curves can be used to determine guided-wave propagation velocity, identify guided-wave modes, and develop appropriate detection data analysis algorithms. The dispersion curve can be obtained by solving the characteristic equation of the guided wave. When the free plate is immersed in water or the pipe is filled with liquid, the propagation of the ultrasonic guided wave in the free plate or pipe is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/296
CPCG01F23/296
Inventor 郭鹏徐鸿李鸿源张凯利田振华
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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