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Ultrasonic wave flow sensor capable of adjusting acoustic reflection device

A flow sensor and reflection device technology, which is applied in the direction of measuring device, measuring flow/mass flow, liquid/fluid solid measurement, etc., can solve the problems of not taking into account reflected waves, flow detection accuracy drop, etc.

Inactive Publication Date: 2016-07-20
XIAN TRIONES DIGITAL INFORMATION
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Problems solved by technology

[0004] The purpose of the present invention is to provide an ultrasonic flow sensor capable of adjusting the acoustic reflection device, to solve the problem that due to manufacturing errors, the energy emitted by the emitted wave cannot be fully accepted by the ultrasonic transducer, and the lower interface of the emitting device is not considered in the prior art The reflected wave caused the technical problem that the detection accuracy of the flow rate decreased

Method used

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  • Ultrasonic wave flow sensor capable of adjusting acoustic reflection device
  • Ultrasonic wave flow sensor capable of adjusting acoustic reflection device
  • Ultrasonic wave flow sensor capable of adjusting acoustic reflection device

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Embodiment 1

[0019] Such as figure 1 , 2 As shown in and 3, an ultrasonic flow sensor capable of adjusting the acoustic reflection device includes:

[0020] A pipe 2 with a rectangular cavity 3 is opened at the bottom;

[0021] The reflecting device 4 arranged in the cavity 3, the bottom of the reflecting device 4 is provided with a rotating shaft 6, the rotating shaft 6 extends out of the pipe, and the rotating rotating shaft 6 can make the reflecting device 4 horizontally move left and right inside the cavity 3;

[0022] The thickness of the reflecting device 4 satisfies 8n+3*λ / 16≤d / cosα≤8n+5*λ / 16, where d is the thickness, α is the ultrasonic incident angle, and λ is the longitudinal wave wavelength of the ultrasonic wave in the tube wall medium, n is a natural number 0, 1, 2······;

[0023] Two symmetrically arranged pipe arms 1, the pipe arms 1 communicate with the horizontally arranged pipe 2, and the intersection of the central axis of the pipe wall 1 is located on the upper surface of the ...

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Abstract

The invention discloses an ultrasonic wave flow sensor capable of adjusting an acoustic reflection device.The ultrasonic wave flow sensor comprises a pipe, the reflection device, two pipe arms and two ultrasonic wave transducers, wherein the bottom of the pipe is provided with a rectangular cavity; the reflection device is arranged in the cavity, the bottom of the reflection device is provided with a rotating shaft, the rotating shaft stretches out of the pipe, and the rotating shaft is rotated so that the reflection device can conduct horizontal movement leftwards and rightwards in the cavity; the two pipe arms are symmetrically arranged; the two ultrasonic wave transducers are arranged at the tops of the pipe arms respectively.By means of the ultrasonic wave flow sensor, the technical problems that due to a manufacturing error, energy emitted by transmitted waves usually cannot be totally absorbed by the ultrasonic wave transducers, and in the prior art, reflected waves on a lower interface of a transmitting device are not considered, so that flow detection precision is lowered are solved.

Description

Technical field [0001] The present invention relates to the field of flow detection, in particular to an ultrasonic flow sensor capable of adjusting an acoustic reflection device. Background technique [0002] Existing ultrasonic flow sensors generally use metal flakes or sensor tube walls as the acoustic reflection device, and the design of the acoustic reflection device is only considered in terms of appearance structure, supporting structure, and connection structure. Since the size of the interface between the fluid and the acoustic reflector device is not much smaller than the wavelength in the acoustic reflector device, but the same order of magnitude as the wavelength or even smaller than the wavelength, the actual reflection effect is very similar to the reflection effect (total reflection) analyzed by the infinite interface. Because of the large difference, the acoustic reflection device without a special design has low reflection efficiency and small echo amplitude. In ...

Claims

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Application Information

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IPC IPC(8): G01F1/66
Inventor 吴新潮
Owner XIAN TRIONES DIGITAL INFORMATION
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