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Reed pipe pulse type fluid flow meter metering method

A metering method and metering technology, which is applied in the direction of volume/mass flow generated by electromagnetic effects, can solve the problems of fluid metering accuracy reduction, flow leakage, and over-metering, so as to remove jitter pulses, avoid missing meters, The effect of improving accuracy

Active Publication Date: 2015-04-08
CHONGQING SHANCHENG GAS EQUIP
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  • Claims
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AI Technical Summary

Benefits of technology

This patented technology helps reduce noise from measuring fluids accurately without generating too many errors or causing damage when trying to measure high speeds over long distances. It also compensates for any variations between different parts of the device's movement due to manufacture differences during production processes.

Problems solved by technology

This patented technical problem addressed in the patents relates to improving the performance of a reed valve pulser used for measuring fluids accurately without over counting any unwanted events caused by variations in ambient conditions such as temperature changes during operation.

Method used

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  • Reed pipe pulse type fluid flow meter metering method

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Embodiment Construction

[0018] attached figure 1 It is a schematic diagram of the steps of the metering method of the reed switch pulse type fluid meter of the present invention. As can be seen from the figure, the metering method of the reed switch pulse type fluid meter of the present invention, the controller MCU corresponds to the pulse interval according to the rated maximum flow rate of the fluid meter 1 / 2 of the time is set as the minimum pulse time threshold Tmin, and 1 / 2 of the pulse interval time corresponding to the rated minimum flow of the fluid meter is set as the maximum pulse time threshold Tmax; at the same time, set up the main and auxiliary counters and The total counter, in which the main and auxiliary counters correspond to two reed switches respectively; when the first pulse is received, the main or auxiliary counter is incremented by 1, and when the next pulse is received, the interval time between it and the previous pulse is judged Whether it is less than Tmin; if yes, discar...

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Abstract

The invention provides a reed pipe pulse type fluid flow meter metering method. A controller MCU (Micro-programmed Control Unit) is used for setting 1/2 of pulse interval time corresponding to a rated maximum flow of a fluid flow meter to a minimum phase time threshold value Tmin, and setting 1/2 of pulse interval time corresponding to a rated minimum flow of the fluid flow meter to a maximum phase time threshold value Tmax; meanwhile, a main counter, an auxiliary counter and a general counter are arranged; each of the main counter and the auxiliary counter corresponds to two reed pipes; whether the main counter and the auxiliary counter are effective or not is judged and counting is performed according to the comparison of the pulse interval time, the Tmin and the Tmax. The reed pipe pulse type fluid flow meter metering method provided by the invention has the beneficial effects that shake pulses can be effectively removed, and excessive metering of the flow is avoided; meanwhile, the condition that the pulse is not triggered caused by the fact that the rotary speed of a word wheel at the end is too fast can be made up and the missed counting of the flow is avoided, so that the fluid metering accuracy of the flow meter is effectively improved.

Description

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Claims

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Application Information

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Owner CHONGQING SHANCHENG GAS EQUIP
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