An Internet of Things (IoT) system for diagnosing accuracy of a smart gas ultrasonic meter, wherein the system comprises a smart gas user platform, a smart gas service platform, a smart gas device management platform, a smart gas sensing network platform, and a smart gas object platform;
- the smart gas user platform includes a plurality of smart gas user sub-platforms;
- the smart gas service platform includes a plurality of smart gas service sub-platforms;
- the smart gas device management platform includes a plurality of smart gas device management sub-platforms and a smart gas data center;
- the smart gas sensing network platform is configured to interact with the smart gas data center and the smart gas object platform;
- the smart gas object platform is configured to acquire gas attribute data of gas passing through a metering device based on a distributed sensor deployed in a gas pipeline network, wherein the gas attribute data includes gas density, composition and mass, fluid pulsation, and flow rate profile;
- the smart gas device management platform is configured to:
- determine a first accuracy risk of the metering device through performing pre-diagnosis on the metering device based on the gas attribute data and metering device information, wherein the metering device information includes a type, a service life and a location, and the first accuracy risk refers to a pre-diagnosed possible abnormal metering device and an abnormal possibility thereof;
- the smart gas device management platform is further configured to:
- predict a predicted gas flow of at least one point in a gas pipeline in a future period based on historical gas monitoring data;
- determine a suspect metering device based on the predicted gas flow and gas monitoring data of the metering device;
- and
- evaluate the first accuracy risk of the suspect metering device based on the gas attribute data and the metering device information:
- determine a second accuracy risk of the metering device through performing precision diagnosis on the metering device based on a pre-diagnosis result, wherein the second accuracy risk refers to a possibility of accuracy abnormality of the possible abnormal metering device;
- the smart gas device management platform is further configured to:
- in response to the first accuracy risk of at least one metering device satisfying a preset risk condition, evaluate the second accuracy risk of the at least one metering device in a gas area based on the first accuracy risk and the gas monitoring data, wherein the preset risk condition refers to a count of metering devices with the first accuracy risk exceeding a first risk threshold reaching a quantity alert value, and the first risk threshold is related to a data monitoring frequency of the metering device:
- the smart gas device management platform is further configured to:
- construct an accuracy diagnosis map based on the metering device in the gas area, wherein nodes of the accuracy diagnosis map include the metering device, edges of the accuracy diagnosis map include gas pipelines between the nodes, attributes of the nodes include types of the metering devices, locations of the nodes in the gas pipeline network, the gas monitoring data, gas theoretical data, the first accuracy risk, flow rate monitoring data, pressure monitoring data, and historical calibration records corresponding to the metering devices;
- and
- determine, based on the accuracy diagnosis map, the second accuracy risk of the at least one metering device in the gas area through a pipeline network diagnosis model, the pipeline network diagnosis model being a machine learning model;
- display detection indication information to the smart gas device management platform based on a precision diagnosis result;
- and
- transmit the detection indication information to the smart gas service platform through the smart gas data center;
- and
- the smart gas service platform is configured to upload the detection indication information to the smart gas user platform.