1. Application background
The Electric Power Metering Center is an electric energy metering and testing agency for the electric power industry. It undertakes the functions of safety life cycle management for electric energy measuring instruments within its jurisdiction, including procurement, warehousing, inspection, distribution, installation, and operation monitoring. With the in-depth transformation of the urban network and the work of households and households, the number of newly installed electric power tables has increased dramatically and it is difficult for conventional metering centers to meet the requirements. The new electricity metering center is constantly being built. The management of electric energy meters is “independent” and the logistics costs are very high, often causing customer complaints. The life cycle management of the metering device is implemented, including procurement, warehousing, verification, distribution, and quality monitoring. In order to achieve intensive management, the metering center attaches a unique "bar code ID card" to each meter, from delivery, verification, inspection, seal sealing to delivery, and use. Each link undergoes "scanning management". The status of any meter can be found at any time.
The use of bar code technology for meter data collection has improved the ability to manage electricity meters to a certain extent. However, this collection method requires the warehouse staff to perform a separate scan on each meter that needs to be exported and stored, and the barcode is scanned. The gun beam must be aligned with the bar code surface of the meter, and the bar code surface must be kept clean and tidy, with low efficiency and low accuracy. At the same time, because the electricity meter is placed on the electric turnover box on the fourth floor, when scanning the bar code of the electric meter, the staff needs to turn the bottom electric meter out for scanning operation, which brings great inconvenience to the staff and greatly reduces the warehouse manager. The work efficiency increases the workload. The non-stop turning of the meter during the scan will have wear on the appearance of the meter, affecting the quality of the meter. Sometimes accidentally dropping the meter to the ground will lead to the direct retirement of the meter, adding to the cost of warehouse management. Every time a warehouse manager scans a bar code data of a meter, he needs to upload it to the data center in real time and perform data verification. If the network is not in a good state, the work will not work normally or the work progress will be very slow.
Barcode technology has changed the management of assets in the power metering center. However, with the development of the metering center business and the urgent need for improvement in management efficiency, the bar code technology has become increasingly limited, and a more advanced data collection method has been constructed. It is of great significance to improve the efficiency of warehouse management.
2. System Introduction
RFID is another technology that has led to changes in the field of automatic identification after barcode technology. The use of wireless electromagnetic waves to achieve the identification of identification items, compared with the traditional bar code technology, RFID has a faster data communication speed, the recognition distance is farther, the surface cleanliness of the identification items is not strict, the reading accuracy is higher; At the same time, its unique tag anti-collision algorithm supports the simultaneous reading of large quantities of item information. It can read up to several dozen asset tags per second, and the radio frequency can penetrate the plastic case to read the data of the underlying asset tag. Information, greatly reduce the workload, improve management efficiency and reduce operating costs.
Electric Meter Metering Storage Management System Based on RFID Technology
Utilize RFID technology, learn from the whole life cycle and logistics management model to conduct business process reengineering, establish the dynamic and refined management of the whole process of the electricity meter, and establish and support information technology support systems to achieve electricity meters from storage, on-site to end-of-life. Accurate and efficient identification, the entire process of dynamic management of the meter logistics process and field work process to achieve the integration of production management and marketing management, to achieve the life cycle management of the meter's assets.
Established an e-meter asset management workflow based on RFID technology and modern logistics technology, improved and optimized existing operating methods, gradually replaced the existing way of bar code management equipment, introduced new management methods and means, and improved the standardization of measurement operations And efficiency, establish a new management model;
Through the introduction of radio frequency identification technology, the meter can be easily identified from storage, on-site to end-of-life, solve the problem of weak asset base of the meter, difficult to collect data on the spot account, and provide users with a full range of asset tracking management tools;
Strengthen the management and control of on-site operation and maintenance work, accurately identify field devices through RFID technology, and inquire relevant equipment and user information in the field at the same time, and input on-site operation and maintenance information, which improves on-site operation and maintenance work efficiency and strengthens the On-site operation and maintenance work supervision and management, while customer satisfaction has been improved;
Achieve the docking of the marketing system and warehouse management system, establish a more accurate data base and more efficient data exchange, and comprehensively improve the efficiency of logistics management of meter assets;
By affixing a composite electronic tag for each meter, a unique identification is established for each meter, which lays a solid data foundation for the improvement of the future marketing work and the application of relevant information management tools.
3. Plan design
This system is an innovative project that integrates RFID automatic identification technology, computer software and control technology, and network technology. Through the physical binding of RFID tags and meters, and through the background data, the electronic tag information is associated with the identity information of the metering assets. At each subsequent node, RFID tag readers can access the electronic tag information to achieve the measurement of asset identities. Recognition. This is the core of the entire system
Rfid system architecture
Established an RFID-based metering asset management application system, optimized existing business processes, realized a dynamic logistics management model, and realized the implementation of electricity meters from delivery, storage, verification, and delivery to distribution, installation, operation, maintenance and retirement. Refined and dynamic management of the entire life cycle. The system flow is designed as follows:
Rfid system flow design
The competent authority assigns the designated meter serial number according to the sales demand. The meter serial number is assigned by the administration to the electronic label supplier. Vendors perform label printing and information writing according to codes. The printed electronic label is affixed by the meter manufacturer on the production line. Electronic meters with good electronic labels are distributed to the corresponding power supply bureau warehouses. This entered the grid company's RFID warehouse management information system. For electricity meters that need to go to and out of the warehouse, data can be collected and exported through RFID devices.
When an electronic meter attached with an electronic tag passes through a scanning device, the antenna performs two-way data exchange with the electronic tag in a microwave communication manner, reads related information from the electronic tag (reads the same information as the existing bar code content), and transmits data Information is transmitted to the data center in real time.
The coding of the electronic tag of the meter needs to be supervised by the higher authorities to perform on-demand distribution. The supervisory department at the higher level sends the coded electronic tag of the meter to the electronic label printing department. Started the first step in warehouse RFID management.
Electronic label printing, information writing
The electronic label printing and information writing work can be done by the RFID tag supplier to ensure that the tag information is correct. It is also possible to complete the print job by the meter production factory, which saves the circulation of electronic tags and reduces system operating costs. Electronic label printing needs to be completed by a professional RFID printer. At the same time, the electronic code is written into the electronic tag data storage area. The electronic label surface can select fonts and icons as needed. In addition to the electronic labels that need to be affixed to the meter, the grid company's meter turnover box also needs to be affixed with a box of electronic tags. This work needs to be performed by the grid company itself. The electronic tag of the box is mainly responsible for binding the data information of the meter, which facilitates the operation of the management system and provides operational efficiency.
Rfid electronic label printing
Electronic label paste
The electronic label paste work must be completed by the meter manufacturer. The electronic label supplier sends the printed label to the corresponding meter manufacturer. The meter manufacturer pastes the electronic label on the end of the meter production line. The electronic label sticking work must ensure the correct pairing of the codes so as to avoid confusion in the grid storage management. The electricity meter manufacturer transports the electric meter with the electronic tag glued to the grid company's warehouse for storage and calibration.
The asset management class unpacks the electronic meter affixed with the electronic label by the supplier and puts it into the turnover box. Through the RFID fixed reader installed on the conveyor belt of the supplier, the entire meter information is automatically obtained in batches, and the information is passed to the Warehousing management system, to achieve large-scale, rapid inventory operation of measurement assets.
Rfid warehouse management
Meter inventory is mainly to view the number of meters and the meter code in the warehouse. Meter inventory only needs to use an RFID handheld device to scan the meter box number to see if the meter is in the library and the quantity is complete.
According to the business acceptance and stock situation, through the same channel of RFID readout equipment, it can simultaneously carry out the batch operation of the pallet-level electricity meter assets, and collect the information of multiple working container labels and the energy meter asset labels in the turnover box at one time. The outbound task list is automatically checked. Provide outbound asset list display, and can print out the current inventory of assets; compare verification of outbound assets. If there is inconsistency between outbound device and outbound inventory information, the system will give an alarm and need warehouse management. The staff checked and checked; after the equipment was successfully delivered, the change status was changed to "pre-empted."
In other aspects of storage, according to the number of assets to be operated, RFID handheld devices and RFID fixed devices are used to perform other operations such as verification, distribution, and other operations on assets, including corrective operations of electronic tag data, verification operations, and so on.
This part is mainly the use of RFID handhelds for the meter out of the library, at the scene, the staff to install, operate and dispose of operation.
When installing on site, read the RFID tag on the device and confirm that the device information is consistent with the information on the service worksheet before allowing installation. This prevents human errors in the process of record and business process carry-over, and can also download the service worksheet. In the handheld device, the installed device information is directly filled into the service worksheet after the installation is completed to ensure the accuracy of the data. After the device is installed, you can change the asset status through the handheld. At the time of service change, the handset can record the change table and the index of the table through the handset, and can easily transmit the information back to the marketing system. In daily maintenance, staff read the past operation and maintenance information of metered assets by reading the RFID tags first and add and update the latest maintenance information. For equipment that has reached end-of-life disposal, the system will automatically remind staff to dispose of it to complete the management of the entire life cycle of the measurement asset.
4. System highlights
The system uses the latest international automatic identification technology—radio-frequency identification (RFID), combined with multiple cross-domain integrated technologies such as modern computers and automatic control. Utilizes the world-famous ThingMagic M6 brand of UHF RFID to utilize its powerful multi-tag anti-collision algorithm. , High-speed information reading and processing capabilities, stable and reliable industrial-grade design, automatic identification of electricity metering assets and information, intelligent management.