Ultrasonic gas meter measurement data adjustment method

Abstract

The invention provides an ultrasonic gas meter measurement data adjustment method, which belongs to the measurement field. The method comprises steps: the temperature value of the environment in whichthe ultrasonic gas meter is located currently is acquired, and the theoretical flight time under the current temperature value is determined; the flight time of ultrasonic signals in a runner is acquired; in combination of the theoretical flight time and a preset flight time threshold, whether an error wave anomaly exists in the ultrasonic gas meter is judged; and if an error wave anomaly exists,automatic gain adjustment is carried out on the ultrasonic gas meter, and based on the adjusted ultrasonic gas meter, gas quantity measurement is carried out. During the process of using the ultrasonic gas meter to measure the gas consumption, a technical characteristic of acquiring a sound standard transmission speed under the temperature value based on the temperature value is introduced, whether an error wave phenomenon exists currently is judged according to the determined sound standard transmission speed, and the defect of possible measurement errors caused by ultrasonic flow measurement can be effectively remedied.

Description

technical field [0001] The application belongs to the field of metering, in particular to an adjustment method for metering data of an ultrasonic gas meter. Background technique [0002] With the advancement of science and technology, the gasification project has developed rapidly, and the measurement of gas is currently mainly carried out by gas meters (industrial flow meters). Ultrasonic gas meter (flow meter), as a new type of electronic gas meter, is widely recognized by the market for its characteristics of less transmission parts and long service life. At present, the ultrasonic gas meter mainly uses the time difference method to detect the flow rate, that is, the instantaneous flow rate is calculated by measuring the uplink and downlink propagation time of the ultrasonic wave, and the gas consumption of the user is obtained by the cumulative calculation of the instantaneous flow rate. [0003] In the application of ultrasonic gas meters, accurate measurement of the f...

AI Technical Summary

Problems solved by technology

However, during the actual use of the ultrasonic meter, the ultrasonic signal will change in intensity and waveform due to factors such as temperature, humidity, large flow in the flow field, and aging of the transducer. At this time, it is easy to detect wrong waves.

The current method of automatic gain adjustment can ensure that the position of the detected initial wave is consistent with the target initial wave, but this operation is generally performed during the power-on initialization process

There is no good solution to the wave error problem during the use of ultrasonic gas meters

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