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Temperature-sensor-free ultrasonic flow meter

A technology of temperature sensor and flow measurement, which is applied in the measurement of flow/mass flow, liquid/fluid solid measurement, instruments, etc. It can solve the problems of inaccurate measurement and achieve the effect of low cost of electronic hardware, low cost and fast calculation

Active Publication Date: 2016-08-03
WEIHAI PLOUMETER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the development of technology and the demand for energy-saving and high-efficiency, more and more heat transfer pipelines use high-temperature and low-flow heat-carrying pipelines, and pipelines with temperatures higher than 100°C often need to use ultrasonic meters to measure flow, so the existing algorithms cannot be used Accurate metering without temperature sensor

Method used

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  • Temperature-sensor-free ultrasonic flow meter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: as attached figure 1 , 2 As shown, the ultrasonic instrument of DN150 is selected, the inner cavity of the measuring tube is cylindrical, the maximum flow rate in the measuring tube is 312m3 / h, the inner diameter of the tube is 150mm, and the sound channel of a group of transducers is 30 meters away from the axis of the measuring tube. °-45°, installed on the center channel, and the other two sets of transducers are 20°-70° to the axis of the measuring tube, respectively installed on the upper channel and the lower channel, the upper channel or the lower channel The height difference from the horizontal channel is 30mm, that is, the distance between the two is 60mm,

[0039]When measuring and calculating, the totalizer first measures the reciprocating time of the three sets of transducers B1, B2, and B3 instantaneously.

[0040] That is: 1. Measure the reciprocating time of the fluid entering the center of the measuring tube through a group of transducer...

Embodiment 2

[0050] Embodiment 2: as attached image 3 As shown, the ultrasonic instrument of DN150 is selected, the inner cavity of the measuring tube is cylindrical, four sets of transducers are arranged on the measuring tube, the maximum flow rate in the measuring tube is 312m3 / h, and the inner diameter of the tube is 150mm , the sound channel of a group of transducers B2 is 60° to the axis of the measuring tube, and the other group of transducers B4 and B2 are installed crosswise, 120° to the axis of the pipeline, all installed in the center acoustic On the channel, the other two sets of transducers are 60° to the axis of the measuring tube, installed on the upper channel and the lower channel respectively, and the other two sets of transducers B1 and B3 are respectively installed on the upper channel and the lower channel There is a 45mm height difference between the upper channel and the lower channel from the horizontal channel, that is, the distance between the two is 90mm.

[005...

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Abstract

The invention discloses a temperature-sensor-free ultrasonic flow meter. The temperature-sensor-free ultrasonic flow meter comprises a measuring pipe, at least three sets of transducers and an integrating instrument. The transducers include the reflecting transducers and the receiving transducers, transducer installation bases are arranged on the side wall of the measuring pipe, and the three sets of transducers are installed in the installation bases respectively. The temperature-sensor-free ultrasonic flow meter is characterized in that an included angle ranging from 10 degrees to 80 degrees is formed between signals generated by the sets of transducers and the axis of a pipeline; the extension line of one transducer penetrates through the diameter part of a meter body to form a central sound track, the other transducers are installed on the upper portion and the lower portion of the central horizontal plane of the meter body respectively to form an upper sound track and a lower sound track, and measurement intervals where the central sound track, the upper sound track and the lower sound track are located are parallel to one another; a chip for measuring time is arranged in the integrating instrument.

Description

technical field [0001] The invention relates to the technical field of flow metering instruments, in particular to an ultrasonic flow meter free from temperature measurement. Background technique [0002] As we all know, the ultrasonic time-of-flight method is widely used in the flow velocity measurement of ultrasonic instruments. The principle is that the paired ultrasonic transducers installed in the ultrasonic measuring tube body alternately transmit and receive ultrasonic signals, and the ultrasonic waves propagate according to a certain trajectory. The linear average velocity of the fluid on the ultrasonic trajectory is obtained by recording and processing the time difference of upstream and downstream ultrasonic waves through electronic devices, but this velocity is not the surface average velocity of the cross-section of the measurement tube; and the ratio coefficient between the two is related to temperature and time difference. Therefore, to display accurate flow, a...

Claims

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Application Information

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IPC IPC(8): G01F1/66
CPCG01F1/662G01F1/668
Inventor 付涛姜晓峰邢燕燕
Owner WEIHAI PLOUMETER
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