阅读说明：本技术 一种基于冗余处理的双源互校交采精度监控系统及方法 (Double-source mutual-correction alternate-mining precision monitoring system and method based on redundancy processing ) 是由 陆寒熹 马祥 马华超 王猛 于 2021-09-15 设计创作，主要内容包括：本发明提供一种基于冗余处理的双源互校交采精度监控系统及方法,该监控系统包括：电源模块、组合互感器单元、计量模块和MCU通信控制单元,所述电源模块为监控系统供电；所述组合互感器单元包括与三相电源对应连接的互感器以及MCU,三个互感器的一路模拟信号输出至计量模块,另一路模拟信号输出至对应的MCU,各MCU与MCU通信控制单元相连；所述计量模块的信号输出端育MCU通信控制单元的对应信号输入端相连。本发明的基于冗余处理的双源互校交采精度监控系统,不仅实现了对交采数据的高精度计量,还能够对交采精度实时监控,提高了计量系统的可靠性。(The invention provides a double-source mutual-correction alternate-acquisition precision monitoring system and method based on redundancy processing, wherein the monitoring system comprises: the system comprises a power supply module, a combined mutual inductor unit, a metering module and an MCU (microprogrammed control unit) communication control unit, wherein the power supply module supplies power to a monitoring system; the combined transformer unit comprises transformers and MCUs (microprogrammed control units) which are correspondingly connected with the three-phase power supply, one path of analog signals of the three transformers are output to the metering module, the other path of analog signals are output to the corresponding MCUs, and each MCU is connected with the MCU communication control unit; and the signal output end of the metering module is connected with the corresponding signal input end of the MCU communication control unit. The double-source mutual-correction alternate-acquisition precision monitoring system based on redundancy processing not only realizes high-precision measurement of alternate-acquisition data, but also can monitor alternate-acquisition precision in real time, and improves the reliability of the measurement system.)

1. A dual-source mutual-correction mutual-acquisition precision monitoring system based on redundancy processing is characterized by comprising: power module, combination mutual-inductor unit, metering module and MCU communication control unit, wherein:

the power supply module comprises an AC-DC and DC-DC conversion circuit and supplies power to the monitoring system;

the combined transformer unit comprises three transformers correspondingly connected with the three-phase power supply and an MCU connected with the corresponding transformers, and the three transformers are respectively used for collecting alternating current signals of the corresponding phase power supply and converting the alternating current signals into analog signals to be output; one path of analog signals of the three transformers are output to the metering module, the other path of analog signals are output to the corresponding MCU, and the ADC module of each MCU processes the analog signals and then sends the processed analog signals to the MCU communication control unit;

the signal input end of the metering module is connected with the analog signal output end of a mutual inductor in the combined mutual inductor unit, and the signal output end of the metering module is connected with the corresponding signal input end of the MCU communication control unit;

and the MCU communication control unit is respectively connected with the corresponding signal output ends of the metering module and the combined transformer unit.

2. The dual-source crossmining accuracy monitoring system based on redundant processing according to claim 1, wherein the signal output end of the metering module is connected to the corresponding signal input end of the MCU communication control unit through an SPI1 bus.

3. The dual-source crosschecking accuracy monitoring system based on redundant processing according to claim 1, wherein the MCU of the combined transformer unit is connected to the MCU communication control unit through the SPI2 bus.

4. The dual-source crosschecking acquisition accuracy monitoring system based on redundant processing according to claim 1, wherein said MCU communication control unit communicates with a platform control center.

5. The dual-source crossmining accuracy monitoring system based on redundant processing as claimed in claim 1, wherein said metering module comprises an external signal processing circuit and a metering chip, said external signal processing circuit comprising a protection circuit and an anti-aliasing filter circuit.

6. A monitoring method adopted by the redundancy processing-based dual-source mutual-correction mining-accuracy monitoring system according to one of claims 1 to 4, characterized in that: the method comprises the following steps:

s1, collecting A, B, C three-phase alternate collection signals by the combined transformer unit, and outputting two paths of analog signals with proper amplitude values after internal conversion; one path of output is output to an external metering module; one path of signals is output to an ADC module of the internal MCU, corresponding alternate acquisition signals are obtained after processing, and one path of SPI interface is provided and output to the MCU communication control unit;

s2, the metering module receives the analog signals output by the combined transformer, and the processed data for collection are transmitted to the MCU through the SPI1 bus;

and S3, the MCU communication control unit communicates with the metering module through the SPI1 to obtain main alternate acquisition data, communicates with the combined mutual inductor unit through the SPI2 bus to obtain auxiliary alternate acquisition data, compares the two sets of data, and when the data are compared and matched, considers that the data are reliable, further uploads the main alternate acquisition data to a rear-stage platform for storage and processing, otherwise, reports an abnormal event.

7. The dual-source crossmining accuracy monitoring method based on redundant processing according to claim 6, characterized in that: in step S2, the analog signal output by the combined transformer is input to the metering chip through the protection circuit and the anti-aliasing filter circuit.

8. The dual-source crossmining accuracy monitoring method based on redundant processing according to claim 6, characterized in that: in step S3, the MCU communication control unit gates the three sensors in the combined transformer in turn through the three chip selection signals to complete reading of the three alternate acquisition data.

Technical Field

The invention relates to the field of electronic technology and electric power centralized meter reading, in particular to a dual-source mutual-correction alternate-collection precision monitoring system and method based on redundancy processing.

Background

In the field of electric power centralized meter reading, with the rapid development of an intelligent measurement technology, the metering equipment realizes high-precision acquisition of alternative acquisition data. For users, the precision of measurement is an important index for evaluating the performance of a measured product. Most of the current terminal products on the market mainly realize the measurement of voltage and current data, more the measurement precision is considered, and whether the data source is reliable or not is ignored. When errors occur in the data of the alternative collection, the problems are difficult to find in a short time, and in the past, not only is the loss caused to operators or users, but also safety problems such as equipment damage are possibly caused.

In view of the foregoing, it is desirable to provide a system that can not only achieve high-precision measurement of the inter-collected data, but also achieve reliable determination of the inter-collected data, and that can find a device failure or a potential failure with a small change in performance early for a key device in a terminal.

Disclosure of Invention

The invention provides a double-source mutual-correction alternate-acquisition precision monitoring system and method based on redundancy processing, which not only realize high-precision measurement of alternate-acquisition data, but also can monitor the alternate-acquisition precision in real time, and improve the reliability of a measurement system.

The technical scheme of the invention is as follows:

the invention provides a double-source mutual-correction alternate-acquisition precision monitoring system based on redundancy processing, which comprises: power module, combination mutual-inductor unit, metering module and MCU communication control unit, wherein:

the power supply module comprises an AC-DC and DC-DC conversion circuit and supplies power to the monitoring system;

the combined transformer unit comprises three transformers correspondingly connected with the three-phase power supply and an MCU connected with the corresponding transformers, and the three transformers are respectively used for collecting alternating current signals of the corresponding phase power supply and converting the alternating current signals into analog signals to be output; one path of analog signals of the three transformers are output to the metering module, the other path of analog signals are output to the corresponding MCU, and the ADC module of each MCU processes the analog signals and then sends the processed analog signals to the MCU communication control unit;

the signal input end of the metering module is connected with the analog signal output end of a mutual inductor in the combined mutual inductor unit, and the signal output end of the metering module is connected with the corresponding signal input end of the MCU communication control unit;

and the MCU communication control unit is respectively connected with the corresponding signal output ends of the metering module and the combined transformer unit.

Further, the signal output end of the metering module is connected to the corresponding signal input end of the MCU communication control unit through the SPI1 bus.

Further, the MCU of the combined transformer unit is connected to the MCU communication control unit through the SPI2 bus.

Further, the MCU communication control unit is communicated with the platform control center.

Furthermore, the metering module comprises an external signal processing circuit and a metering chip, and the external signal processing circuit comprises a protection circuit and an anti-aliasing filter circuit.

A monitoring method adopted by a double-source mutual-correction alternate-mining precision monitoring system based on redundancy processing comprises the following steps:

s1, collecting A, B, C three-phase alternate collection signals by the combined transformer unit, and outputting two paths of analog signals with proper amplitude values after internal conversion; one path of output is output to an external metering module; one path of signals is output to an ADC module of the internal MCU, corresponding alternate acquisition signals are obtained after processing, and one path of SPI interface is provided and output to the MCU communication control unit;

s2, the metering module receives the analog signals output by the combined transformer, and the processed data for collection are transmitted to the MCU through the SPI1 bus;

and S3, the MCU communication control unit communicates with the metering module through the SPI1 to obtain main alternate acquisition data, communicates with the combined mutual inductor unit through the SPI2 bus to obtain auxiliary alternate acquisition data, compares the two sets of data, and when the data are compared and matched, considers that the data are reliable, further uploads the main alternate acquisition data to a rear-stage platform for storage and processing, otherwise, reports an abnormal event.

Further, in step S2, the analog signal output by the combined transformer is input to the metering chip through the protection circuit and the anti-aliasing filter circuit.

Further, in step S3, the MCU communication control unit gates the three sensors of the combined transformer in turn through the three chip selection signals to complete reading of the three alternate acquisition data.

The invention has the beneficial effects that:

the double-source mutual-correction alternate-acquisition precision monitoring system based on redundancy processing not only realizes high-precision measurement of alternate-acquisition data, but also can monitor alternate-acquisition precision in real time, and improves the reliability of the measurement system.

The MCU communication control unit is provided with two SPI interfaces which are respectively connected with the metering module and the combined mutual inductor unit, the metering module processes sensor data and outputs the processed sensor data to the control unit to be used as main mutual acquisition data, and ADC modules of all MCUs in the combined mutual inductor unit perform redundancy processing on analog signals and then send the processed analog signals to the MCU communication control unit to be used as auxiliary mutual acquisition 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 transformer unit through the SPI, and when two groups of data in a period of time are matched, the MCU communication control unit uploads the data of the metering module to a next-stage platform for data storage and processing; when two groups of data are compared and abnormal for many times within a period of time, the MCU communication control unit reports the abnormal event to the rear-stage platform, and related maintenance personnel can judge the device abnormality in time after receiving the abnormal event and replace related fault devices or equipment.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.

FIG. 1 is a block diagram of the present invention.

Detailed Description

Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein.

As shown in fig. 1, the invention comprises a power supply module, a combined transformer unit, a metering module and an MCU communication control unit;

the power supply module comprises an AC-DC and DC-DC conversion circuit and provides stable and reliable power supply for the system.

Combining the transformer units: the system comprises three combined transformers and corresponding MCU, wherein the transformers respectively collect A, B, C three-phase alternate collection signals, and after internal conversion, the transformers output two paths of analog signals with proper amplitude; one path of output is output to an external metering module; one path of the signal is output to an ADC module of the internal MCU, and a corresponding alternate acquisition signal is obtained after internal processing; and providing a path of SPI interface, outputting to the MCU communication control unit, and realizing communication with external equipment.

The metering module is composed of an external signal processing circuit and a metering circuit, analog signals output by the combined mutual inductor are input to the metering chip after passing through the protection circuit and the anti-aliasing filter circuit, the metering chip transmits converted alternate acquisition data to the MCU communication control unit through the SPI1 bus, and the alternate acquisition data serves as a source of main metering data of the system.

The MCU communication control unit is communicated with the metering module through the SPI1 and communicated with the combined transformer unit through an SPI2 bus.

Specifically, the three combined transformer units share one path of SPI _ CLK, SPI _ MISO, SPI _ MOSI, and the main MCU sequentially gates the three combined transformers in turn through the three chip selection signals CS1, CS2, and CS3, thereby completing reading of the three-path interleaved data. The combined mutual inductor unit completes redundancy processing of the alternate acquisition data through the MCU module connected with the combined mutual inductor unit, the MCU communication control unit acquires main alternate acquisition data and auxiliary alternate acquisition data, compares the two sets of data, considers that the data are reliable when the data are in correct comparison, further uploads the main alternate acquisition data to a rear-stage platform for storage and processing, and otherwise reports an abnormal event. The problem of the alternate acquisition data of the terminal can be found in time, and the reliability of the alternate acquisition data is greatly improved.

Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.