[Chinese instrument network meter patent] creative limit, instrumentation invention. Today, we introduced a national invention-issued patent—an on-line integrated error calibration method for smart water meters. The patent was applied for by Tianjin Electric Power Technology Development Co., Ltd. and was authorized to be announced on February 2, 2018.
Content Description
The invention belongs to the field of flow measurement, in particular to an on-line integrated error calibration method of a smart water meter.
Background of the invention
The overall error of the metering device is not the basic error required by the metrological verification procedure. It is actually the error eigenvalue, which is a function of the error with respect to flow and power factor. Assuming that the function of the error is quantifiable and descriptive, online integrated error calibration can be achieved. At present, it is generally considered that metrological data needs to be verified under the same standard conditions before it can be calculated and compared. However, in real life, especially under the online verification environment, the verification conditions cannot be strictly specified.
The so-called comprehensive error of the meter refers to the relative error value of the meter under the specified test conditions (including the scope of influence, environmental conditions, test wiring, etc.), which reflects the basic accuracy of the water meter measurement. However, it is not a true error in the use of water meters. Because the conditions of use prescribed by water meters are wider than the conditions for measuring basic errors.
The accuracy of metering devices in operation is always a hot issue that residents and suppliers are most concerned about. At present, methods such as using statistical analysis methods or adding on-line testing equipment are commonly used, which can be used to monitor and evaluate the operation errors of smart water meters. Although the statistical analysis method has changed the past rotation of residential smart meters into spot inspections, it still controls the overall batch; adding online monitoring equipment will inevitably bring about an increase in procurement and maintenance costs for the company. This method has high maintenance costs. There are limitations.
After searching, no published patent documents of similar technologies were found.
Summary of the Invention
The purpose of the present invention is to overcome the deficiencies of the prior art and provide an on-line integrated error calibration method for a smart water meter.
The figure is a remote verification flowchart of the present invention
The invention solves the technical problem by adopting the following technical scheme: an on-line integrated error calibration method of a smart water meter is characterized in that: the specific steps of the method are: (1) The intelligent water meter cluster is installed to form a tree topology, and the method is obtained Flow conservation basic model of intelligent water meter cluster; can remotely obtain the total flow chart and the flow data of the sub-meters in the smart water meter cluster, and simultaneously obtain the total table and the running conditions of the sub-tables in the cluster; (2) According to the smart water meter cluster formation The tree topology, the introduction of virtual branch dynamic correction smart meter cluster topology model, to obtain a flux conservation algorithm model; virtual branch replaces the sum of the loss of the loss of the line, the virtual branch includes the virtual intelligent water meter and virtual load; (3 ) Record the flow data of the smart meter cluster in operation for many times, and record the operating conditions of the smart water meter cluster; (4) According to the total table of the cluster and the operating conditions of the sub-tables, the equivalent amount of traffic is converted; (5) Substitute the equivalent data after conversion into the flux conservation algorithm model to calculate the current period error; (6) Calculation of the previous step If the correction and the uncertainty evaluation; (7) integrated error obtained by calculation.
The advantages and positive effects of the present invention are as follows: 1. The method utilizes the principle of conservation of flow and big data analysis technology to realize massive on-line operation intelligence without adding standard equipment, changing the meter structure, or changing the topology of the smart meter cluster. Water meter error remote detection. 2. This method establishes a modified topology model based on virtual branches to achieve 100% reliability of on-line operational smart meter error measurement, and guides smart meter replacement work leanly. 3. This method incorporates the big data prediction technology of error trends in smart water meters. Before the outlier problem occurs, users can complete the task without changing their operations, eliminate hidden dangers, and avoid unnecessary measurement accuracy disputes. 4. The present invention can effectively reduce the cost of marketing operations, significantly reduce the consumption of personnel, vehicles, equipment, and other resources in the verification process, save the cost of marketing, maintenance, and maintenance; and, by implementing remote verification, the accuracy of faulty intelligent water meters can be realized. Replacement will reduce the number of trouble-free smart water meters that can be removed and green, save procurement funds, significantly reduce the cost of operation and maintenance of the enterprise, achieve quality improvement, and have significant economic and social benefits. 5. The purpose of the present invention is that in actual operation, under the operating conditions that exceed the amount of influence of the laboratory conditions, after the preliminary quantification, the data of the online operation of the meter under different conditions can be used as the calculation value to realize the non-performance. Accurate calibration under experimental conditions, the use of the whole data sample thinking, mining power user information acquisition system massive computer data, without the use of external standard equipment, reduce costs and improve efficiency.
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