[Meter's Latest Patent] Adaptive Low-Power Sampling Method for Ultrasonic Water Meters

Content Description

The invention relates to the technical field of fluid metering equipment, in particular to an adaptive low-power sampling method of an ultrasonic meter.

Background of the invention

As we all know, the existing ultrasonic water meter sampling cycle includes four stages, specifically the downstream water sampling phase T1, reverse water sampling phase T2, data processing and calculation phase T3 and system dormancy phase T4, this traditional sampling method is performed every T milliseconds. A water flow and backwater measurement, from the perspective of power consumption, consumes a very low power consumption in the sleep stage T4, and the power consumption in the downstream water sampling stage T1 and the reverse water sampling stage T2 is the largest, and the power consumption in the T3 stage consumes two Between. In general, in a T millisecond period, the values ​​of T1, T2, and T3 of the system are usually fixed values, and T4 varies depending on the sampling period T. In order to reduce power consumption, this conventional system can only be achieved by dynamically adjusting the period T, and it can be seen that this method of reducing power consumption does not achieve a significant effect.

Summary of the Invention

The purpose of the present invention is to solve the above-mentioned deficiencies of the prior art and provide an adaptive low-power sampling method of an ultrasonic water meter with a simple, significant energy saving and power consumption reduction method.

The technical solution adopted by the present invention to solve the technical problems is: an adaptive low-power sampling method of an ultrasonic water meter, which is characterized in that the number of sampling data of the downstream water sampling phase T1 or the reverse water sampling phase T2 is reduced in the microprocessor. To achieve the purpose of reducing power consumption, the specific method steps are as follows: 1) sampling the T1 water sampling stage during the K sampling period, and storing the sampling data S(K) in the queue Q1; 2) judging the sampling data S (K Whether the distance between S(K-1) exceeds the threshold L, if it does not exceed the threshold L, skip to step 5, otherwise continue to the next step; 3) sample the reverse water sampling phase T2 in the K sampling period, and sample The data N(K) is stored in the queue Q2; 4) The data processing and calculation stage T3 and the system dormancy phase T4 are performed within the K sampling period so that K=K+1, and then skip to step 1; 5) The K sampling Perform data processing in the cycle and data sampling in calculation phase T3 and system sleep phase T4 so that K=K+1; 6) In the K sampling cycle, the data sampling of the reversed water sampling phase T2 is performed, and the sampling data N(K) is stored In queue Q2; 7) determine if the distance between N(K) and N(K-1) exceeds Threshold L, if it does not exceed the threshold L, skip to step 10), otherwise continue; 8) In the K sampling period for sampling in the downstream water sampling phase T1, and store the sampling data S(K) in the queue Q1; 9 The data processing and calculation stage T3 and the system dormancy phase T4 are performed within the K sampling period so that K=K+1, and then jumps to step 6); 10) The data processing and calculation stage T3 and the system are performed within the K sampling period Sleep stage T4, so that K = K + 1, and then jump to step 1).

The threshold L of the present invention may be greater than the absolute values ​​of S(K) and S(K-1) or the absolute values ​​of N(K) and N(K-1), and the threshold range is preferably between 300ps-500ps. To ensure that the program responds quickly to changes in water flow.

Due to the adoption of the above sampling method, the present invention has the advantages of reducing power consumption, saving energy and reducing cost.

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