Ultrasonic gas meter metering data sampling method and device
A technology for measuring data and gas meters, which is applied in the field of measuring data sampling methods and devices for ultrasonic gas meters, and can solve the problems of high power consumption and the like
Active Publication Date: 2021-07-23
郑州安然测控技术股份有限公司
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[0006]
The present invention provides a method and device for sampling measurement data of an ultrasonic gas meter to solve the problem of large power consumption caused by the prior art
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[0026] The design of the inventive method comes from following analysis:
[0027] 1. Analysis of pulsating flow interference technology.
[0028] The main way of pulsating flow interference counting is to change the frequency of switching valves, so that the ultrasonic meter cannot accurately measure when sampling, so as to achieve the purpose of interference counting and less counting. According to the analysis, when the valve is open, the air flow can pass through the gas meter normally, but when the valve is closed, no air flow passes through the inside of the gas meter. At this time, the air flow rate detected by the ultrasonic metering module is zero. However, due to the short closing time of the valve, the normal use of the gas appliance will not be affected in this case, thus affecting the normal measurement of the ultrasonic meter.
[0029] 2. Analysis of the degree of influence of pulsating flow frequency range on counting.
[0030] According to the analysis in Part...
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The invention belongs to the technical field of gas meters, and particularly relates to an ultrasonic gas meter metering data sampling method and device. The method comprises the following steps: firstly, in a set detection period, according to sampled metering data of a gas meter, judging whether the sampled metering data is influenced by pulsating flow or not; if the metering data sampled in the detection period is influenced by the pulsating flow, delaying a sampling time starting point of the metering data, and re-sampling the metering data in the detection period, wherein the delay time is smaller than the sampling period, and the sampling period is smaller than the detection period; and then re-judging whether the metering data resampled in the detection period is influenced by the pulsating flow or not, and if the metering data resampled in the detection period is still influenced by the pulsating flow, repeating the steps until the metering data resampled at last is not influenced by the pulsating flow any more. According to the invention, the problems of inaccurate metering, missed recording, less recording and the like caused by pulsating flow can be effectively eliminated and avoided, the metering accuracy is ensured, and the power consumption of the gas meter is not increased.
Description
technical field [0001] The invention belongs to the technical field of gas meters, and in particular relates to a method and device for sampling measurement data of an ultrasonic gas meter. Background technique [0002] With the development of ultrasonic technology, it has been able to be applied to the field of gas metering. Ultrasonic metering technology can not only accurately detect gas flow, but also has a wider range ratio than membrane gas meters, and can realize temperature and pressure compensation. , so the current ultrasonic gas metering technology has been accepted and recognized by the gas company. [0003] The detection principle of the ultrasonic metering module is to detect the instantaneous flow rate of the gas, through the integral of the instantaneous flow rate to the sampling interval time, and then obtain the passing volume of the gas within the interval time, so as to realize the measurement of gas. Generally, the sampling interval is 2 seconds. This ...
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IPC IPC(8): G01F1/66G01F15/00G01F25/00
CPCG01F1/66G01F15/007G01F15/00G01F25/15
Inventor 谢伟周文辉马伟力陈晶晶曹登高陈璇李友能王丹丹李娟张青松张静伍勇丽李小磊刘小涛谭峰敏马云梁会珍胥凯强宋丹曾楚文唐宏伟王智渊乔磊左孝堂徐宗云冯德军陈媛媛王霞王晓丽王帅杨志豪
Owner 郑州安然测控技术股份有限公司