A dual-source mutual calibration and acquisition accuracy monitoring system and method based on redundant processing

Abstract

The present invention provides a dual-source mutual calibration and cross-acquisition accuracy monitoring system and method based on redundant processing, the monitoring system includes: a power module, a combined mutual inductor unit, a metering module and an MCU communication control unit, the power module supplies power to the monitoring system; the combined mutual inductor unit includes a mutual inductor and an MCU corresponding to a three-phase power supply, one analog signal of the three mutual inductors is output to the metering module, and another analog signal is output to the corresponding MCU, each MCU is connected to the MCU communication control unit; the signal output end of the metering module is connected to the corresponding signal input end of the MCU communication control unit. The dual-source mutual calibration and cross-acquisition accuracy monitoring system based on redundant processing of the present invention not only realizes high-precision metering of cross-acquisition data, but also can monitor the cross-acquisition accuracy in real time, thereby improving the reliability of the metering system.

Description

Technical Field

[0001] The present invention relates to the field of electronic technology and electric power collection, and in particular to a dual-source mutual calibration and cross-collection accuracy monitoring system and method based on redundant processing. Background Art

[0002] In the field of electric power collection, with the rapid development of intelligent measurement technology, metering equipment has achieved high-precision collection of exchange data. For users, the accuracy of measurement is an important indicator for evaluating the performance of a metering product. At present, most of the terminal products on the market mainly measure voltage and current data, and pay more attention to the accuracy of measurement, but ignore whether the source of the data is reliable. When errors occur in the exchange data, it is difficult to find the problem in a short time. In the long run, it will not only cause losses to operators or users, but also may cause safety problems such as equipment damage.

[0003] In summary, it is necessary to provide a system that can not only achieve high-precision measurement of exchange data, but also realize reliability judgment of exchange data. For key components in the terminal, it can detect potential failures of components or slight changes in performance in the early stage as early as possible. Summary of the invention

[0004] The present invention provides a dual-source mutual calibration cross-acquisition accuracy monitoring system and method based on redundant processing, which not only realizes high-precision measurement of cross-acquisition data, but also can monitor the cross-acquisition accuracy in real time, thereby improving the reliability of the measurement system.

[0005] The technical solution of the present invention is:

[0006] The present invention provides a dual-source mutual calibration and cross-collection accuracy monitoring system based on redundant processing, the monitoring system comprising: a power supply module, a combined mutual inductor unit, a metering module and an MCU communication control unit, wherein:

[0007] The power supply module includes AC-DC and DC-DC conversion circuits to supply power to the monitoring system;

[0008] The combined mutual inductor unit includes three mutual inductors correspondingly connected to the three-phase power supply and an MCU connected to the corresponding mutual inductors, wherein the three mutual inductors are respectively used to collect the AC signals of the corresponding phase power supply and convert them into analog signals for output; one analog signal of the three mutual inductors is output to the metering module, and the other analog signal is output to the corresponding MCU, and the ADC module of each MCU processes the aforementioned analog signal and sends it to the MCU communication control unit;

[0009] The signal input end of the metering module is connected to the analog signal output end of the mutual inductor in the combined mutual inductor unit, and the signal output end of the metering module is connected to the corresponding signal input end of the MCU communication control unit;

[0010] The MCU communication control unit is connected to corresponding signal output ends of the metering module and the combined transformer unit respectively.

[0011] Furthermore, the signal output terminal of the metering module is connected to the corresponding signal input terminal of the MCU communication control unit through the SPI1 bus.

[0012] Furthermore, the MCU of the combined transformer unit is connected to the MCU communication control unit via a SPI2 bus.

[0013] Furthermore, the MCU communication control unit communicates with the platform control center.

[0014] Furthermore, the metering module includes an external signal processing circuit and a metering chip, and the external signal processing circuit includes a protection circuit and an anti-aliasing filter circuit.

[0015] A monitoring method adopted by a dual-source mutual calibration and acquisition accuracy monitoring system based on redundant processing, the method comprising the following steps:

[0016] S1, the combined mutual inductor unit collects the three-phase cross-acquisition signals of A, B, and C, and after internal conversion, outputs two analog signals with appropriate amplitudes; one is output to the external metering module; the other is output to the ADC module of the internal MCU, and the corresponding cross-acquisition signal is obtained after processing, and an SPI interface is provided to output to the MCU communication control unit;

[0017] S2, the metering module receives the analog signal output by the combined mutual inductor, and the processed exchange data is transmitted to the MCU communication control unit through the SPI1 bus;

[0018] S3, MCU communication control unit communicates with the metering module through SPI1 to obtain the main exchange data, communicates with the combined transformer unit through SPI2 bus to obtain the auxiliary exchange data, and compares the two sets of data. When the data comparison matches, the data is considered reliable, and the main exchange data is further uploaded to the post-stage platform for storage and processing. Otherwise, an abnormal event is reported.

[0019] Furthermore, in step S2, the analog signal output by the combined mutual inductor is input into the metering chip after passing through the protection circuit and the anti-aliasing filter circuit.

[0020] Furthermore, in step S3, the MCU communication control unit selects the three sensors in the combined mutual inductor in turn through the three-way chip selection signal to complete the reading of the three-way cross-collection data.

[0021] Beneficial effects of the present invention:

[0022] The redundant processing-based dual-source mutual calibration cross-acquisition accuracy monitoring system of the present invention not only realizes high-precision measurement of cross-acquisition data, but also can monitor the cross-acquisition accuracy in real time, thereby improving the reliability of the measurement system.

[0023] The MCU communication control unit of the present invention has two SPI interfaces, which are respectively connected to the metering module and the combined mutual inductor unit. The metering module processes the sensor data and outputs it to the control unit as the main exchange data. The ADC module of each MCU in the combined mutual inductor unit performs redundant processing on the analog signal and sends it to the MCU communication control unit as the auxiliary exchange data. The MCU communication control unit reads the metering data in the metering module in real time, and periodically reads the internal data of the combined mutual inductor unit through the SPI interface. When the two groups of data within a period of time match, the MCU communication control unit uploads the data of the metering module to the next-level platform for data storage and processing. When the two groups of data are compared abnormally for multiple times within a period of time, the MCU communication control unit will report the abnormal event to the next-level platform. After receiving the abnormal event, the relevant maintenance personnel can promptly determine the device abnormality and replace the relevant faulty devices or equipment.

[0024] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0026] Figure 1 It is a structural diagram of the present invention. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0028] like Figure 1 As shown, the present invention includes a power module, a combined transformer unit, a metering module and an MCU communication control unit;

[0029] The power module includes AC-DC and DC-DC conversion circuits to provide stable and reliable power for the system.

[0030] Combined transformer unit: The system includes three combined transformers and corresponding MCUs. The transformers collect three-phase cross-sampled signals A, B, and C respectively, and output two analog signals with appropriate amplitudes after internal conversion; one signal is output to the external metering module; one signal is output to the ADC module of the internal MCU, and after internal processing, the corresponding cross-sampled signal is obtained; and an SPI interface is provided, which is output to the MCU communication control unit to realize communication with external devices.

[0031] The metering module consists of an external signal processing circuit and a metering circuit. The analog signal output by the combined mutual inductor is input into the metering chip after passing through the protection circuit and the anti-aliasing filter circuit. The metering chip transmits the converted exchange data to the MCU communication control unit through the SPI1 bus. This exchange data serves as the source of the main metering data of the system.

[0032] The MCU communication control unit communicates with the metering module through SPI1 and communicates with the combined transformer unit through SPI2 bus.

[0033] Specifically, the three combined mutual inductor units share one SPI_CLK, SPI_MISO, and SPI_MOSI. The main MCU selects the three combined mutual inductors in turn through three chip select signals CS1, CS2, and CS3 to complete the reading of the three-way cross-acquisition data. The combined mutual inductor unit completes the redundant processing of the cross-acquisition data by the MCU module connected to it. The MCU communication control unit obtains the main cross-acquisition data and the auxiliary cross-acquisition data, and compares the two sets of data. When the data comparison is normal, the data is considered reliable, and the main cross-acquisition data is further uploaded to the post-stage platform for storage and processing. Otherwise, an abnormal event is reported. The cross-acquisition data problems that occur in the terminal can be discovered in a timely manner, which greatly improves the reliability of the cross-acquisition data.

[0034] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A dual-source mutual calibration and cross-acquisition accuracy monitoring system based on redundant processing, characterized in that The monitoring system includes: a power module, a combined transformer unit, a metering module and an MCU communication control unit, wherein: The power supply module includes AC-DC and DC-DC conversion circuits to supply power to the monitoring system; The combined mutual inductor unit includes three mutual inductors correspondingly connected to the three-phase power supply and an MCU connected to the corresponding mutual inductors, wherein the three mutual inductors are respectively used to collect the AC signals of the corresponding phase power supply and convert them into analog signals for output; one analog signal of the three mutual inductors is output to the metering module, and the other analog signal is output to the corresponding MCU, and the ADC module of each MCU processes the aforementioned analog signal and sends it to the MCU communication control unit; The signal input end of the metering module is connected to the analog signal output end of the mutual inductor in the combined mutual inductor unit, and the signal output end of the metering module is connected to the corresponding signal input end of the MCU communication control unit; The MCU communication control unit is connected to the corresponding signal output ends of the metering module and the combined transformer unit respectively; The signal output terminal of the metering module is connected to the corresponding signal input terminal of the MCU communication control unit through the SPI1 bus; The MCU of the combined mutual inductor unit is connected to the MCU communication control unit via the SPI2 bus; The MCU communication control unit communicates with the metering module through SPI1 to obtain the main exchange data, and communicates with the combined transformer unit through the SPI2 bus to obtain the auxiliary exchange data, and compares the two sets of data. When the data comparison matches, the data is considered reliable, and the main exchange data is further uploaded to the post-stage platform for storage and processing. Otherwise, an abnormal event is reported.

2. The dual-source mutual calibration and cross-sampling accuracy monitoring system based on redundant processing according to claim 1 is characterized in that The MCU communication control unit communicates with the platform control center.

3. The dual-source mutual calibration and cross-sampling accuracy monitoring system based on redundant processing according to claim 1 is characterized in that The metering module includes an external signal processing circuit and a metering chip, and the external signal processing circuit includes a protection circuit and an anti-aliasing filter circuit.

4. A monitoring method adopted by the dual-source mutual calibration and cross-sampling accuracy monitoring system based on redundant processing according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: S1, the combined mutual inductor unit collects the three-phase cross-acquisition signals of A, B, and C, and after internal conversion, outputs two analog signals with appropriate amplitudes; one is output to the external metering module; the other is output to the ADC module of the internal MCU, and the corresponding cross-acquisition signal is obtained after processing, and an SPI interface is provided to output to the MCU communication control unit; S2, the metering module receives the analog signal output by the combined mutual inductor, and the processed exchange data is transmitted to the MCU communication control unit through the SPI1 bus; S3, MCU communication control unit communicates with the metering module through SPI1 to obtain the main exchange data, communicates with the combined transformer unit through SPI2 bus to obtain the auxiliary exchange data, and compares the two sets of data. When the data comparison matches, the data is considered reliable, and the main exchange data is further uploaded to the post-stage platform for storage and processing. Otherwise, an abnormal event is reported.

5. The method for monitoring the accuracy of dual-source mutual calibration and cross-sampling based on redundant processing according to claim 4 is characterized in that: In step S2, the analog signal output by the combined mutual inductor is input into the metering chip after passing through the protection circuit and the anti-aliasing filter circuit.

6. The method for monitoring the accuracy of dual-source mutual calibration and cross-sampling based on redundant processing according to claim 5 is characterized by: In step S3, the MCU communication control unit selects the three sensors in the combined mutual inductor in turn through the three-way chip selection signal to complete the reading of the three-way cross-collection data.

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