Device for ultrasonic measuring liquid level and method thereof

An ultrasonic measurement and ultrasonic technology, applied in the field of liquid level gauges, can solve problems such as inaccurate measurement, large errors, and measurement errors, and achieve the effect of improving accuracy

Inactive Publication Date: 2008-01-02
北京锐致聪科技有限公司
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Problems solved by technology

[0007] However, in the actual use environment, the temperature and pressure of the medium may change, resulting in the value of the sound velocity is not necessarily a constant value of 340m/s, and the above method assumes that the sound velocity is a constant value, which is not true in the actual use environment Changes in the situation will obviously cause a large measurement error
In addition, the above-mentioned conventional threshold value judgment method for determining time in the prior art itself has a large error
[0008] Another existing technology for measuring liquid level, such as the technology disclosed in

Method used

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  • Device for ultrasonic measuring liquid level and method thereof
  • Device for ultrasonic measuring liquid level and method thereof
  • Device for ultrasonic measuring liquid level and method thereof

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0039] In the present invention, a plurality of probes are placed on the same plane above the liquid surface, one emits ultrasonic waves, and the rest receive the emitted ultrasonic waves. Due to the different positions of the receiving probes, the propagation paths of the received sound waves are different, that is, the propagation times are different. The data acquisition device is used to determine the propagation time of the signals received by each receiving probe, so as to determine the angular relationship between the propagating sound rays. Connect the connection lines between the probes and the propagation trajectory of the sound rays, etc., and the calculation of the height of the liquid level is equivalent to the calculation of the height of the triangle. The distance between the probes is a preset fixed value, that is, the base of t...

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Abstract

The invention discloses a device and method of measuring liquid using ultrasonic. The device includes: a signal generator; a data collecting device; a data process device; it is characterized in that it also includes an ultrasonic sending probe and at least two ultrasonic receiving probes which are fixed to a probe fixation device. The method includes following steps: 1)an ultrasonic sending probe sends ultrasonic to surface of liquid; 2)at least two ultrasonic receiving probes receive ultrasonic reflected from surface of liquid detected; 3)time of ultrasonic from sending to receiving is recorded; 4)radial distance and lognitudinal distance between said ultrasonic receiving probes and said ultrasonic sending probe are ensured; 5)altitude of liquid can be obtained by said time of ultrasonic and said radial distance and lognitudinal distance. The invention does not need to consider speed of sound, and precision of measuring liquid is increased.

Description

technical field [0001] The invention relates to a liquid level gauge, in particular to an ultrasonic liquid level measuring device and method, which can accurately measure the height of various liquids. Background technique [0002] Ultrasonic technology has irreplaceable advantages of other types of instruments in measuring liquid level, such as convenient installation and commissioning, simple maintenance and repair, high precision, and good performance. Therefore, it has been widely used in liquid level measurement in industrial enterprises. [0003] Existing ultrasonic liquid level measurement technology often needs to consider the sound velocity of ultrasonic waves, such as the technology disclosed in Document 1: "Principles and Applications of Ultrasonic Liquid Level Meters, Zhang Xiaoyan, Heilongjiang Paper, No. 3, 2004", as shown in Fig. As shown in 1, this technology installs an ultrasonic probe with a combined transmitter and receiver directly above the liquid to ...

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Application Information

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IPC IPC(8): G01F23/296G01S15/08
Inventor 王君琳王晓东孙德兴肖灵
Owner 北京锐致聪科技有限公司
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