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1 Introduction
In order to further regulate the daily inspection, testing, scrapping and management of network manufacturers and purchases of electric safety tools and equipment, the whole process monitors daily inspections, periodic tests and other links to ensure the safe use of electric safety tools and equipment, and reduce the burden on staff. Whether to develop a feasible network-based power safety equipment management system, and adopt advanced RFID radio frequency identification technology, electronic tag automatic identification technology to manage safety equipment is particularly important. This article takes a real project as an example to introduce the application of RFID radio frequency identification technology in the management system of electric safety equipment and related technologies.
2. RFID related technology
RFID is the abbreviation of Radio Frequency Identification, that is, radio frequency identification. It is often called inductive electronic chip or proximity card, proximity card, non-contact card, electronic label, electronic barcode, etc. The principle is to use the transmission characteristics of radio frequency signal and spatial coupling (inductive or electromagnetic coupling) or radar reflection to realize automatic identification of the identified object. The identification work does not require manual intervention and can work in various harsh environments. RFID radio frequency identification technology can identify high-speed moving objects and can identify multiple electronic tags at the same time, and the operation is quick and convenient.
The most basic RFID system consists of three parts:
RFID electronic tags (Tag): Composed of coupling elements and chips, each tag has a unique electronic code, attached to the object to identify the target object, according to the different power supply methods of the electronic tag, electronic tags can be divided into active electronic tags tag), passive tag (Passive tag) and semi-passive tag (Semi-passive tag).
RFID Reader/Reader: Wirelessly communicate with RFID radio frequency identification technology electronic tags through antennas, which can read or write tag identification codes and memory data. A typical reader contains high frequency Module (transmitter and receiver), control unit and reader antenna.
Antenna: Transmit radio frequency signals between the tag and the reader.
Some characteristics of RFID:
(1) Data reading and writing (ReadW rite) function: As long as the RFID Reader can directly read the message without contact, and can process multiple tags at a time, and can write status information into the tag.
(2) Easy to miniaturize and diversified shapes: RFID is not limited by size and shape in reading, and does not need to match the fixed size and printing quality of the paper for reading accuracy. In addition, RFID radio frequency identification technology TAG can be further miniaturized and diversified to be applied to different products.
This system is composed of two parts, a handheld terminal system based on RFID and a database management system based on WEB. The handheld terminal system adopts a portable, flexible and easy-to-use handheld terminal terminal, on which embedded development is carried out, and RFID data collection is carried out; the WEB management system adopts .NET framework + ORACLE database development.
(3) Environmental resistance: Once the paper is soiled, it will be invisible, but RFID has strong resistance to water, oil, drugs and other substances. RFID radio frequency identification technology can also read data in a dark or dirty environment.
(4) Reusable: Since RFID is electronic data, it can be overwritten repeatedly, so the label can be recycled and reused. For example, passive RFID radio frequency identification technology can be used without batteries, and there is no need for maintenance.
(5) Penetration: If RFID is covered by non-metal or non-transparent materials such as paper, wood, plastic, etc., it can also communicate through penetration. However, if it is ferrous metal, communication is not possible.
(6) The memory capacity of data is large: the data capacity will expand with the development of memory specifications, and the amount of data that objects need to carry in the future will increase. The demand for the expansion of the capacity of the label is also increasing. For this RFID radio frequency Recognition technology will not be restricted.
Among them, the Web management system is a three-tier ASP. NET application: interface layer, logic layer and database layer. The interface layer is responsible for processing user input and output to the user. The logical layer is the link between the upper and lower layers. It establishes the actual database connection, generates SQL statements to retrieve or update the database according to the user’s request, and returns the results to the client. The database layer is responsible for the actual data storage and retrieval.
The handheld terminal has the characteristics of non-contact and high reading rate. The RFID radio frequency identification technology electronic tags used can read and write and have a large storage capacity.
When conducting inspection and test management of insulating tools and instruments on the computer network system of power supply enterprises, RFID radio frequency identification technology is used to replace the traditional paper test certificate, and the structure also has the following characteristics:
(1) Informatization: Through the combination of modern computer network information technology and professional technology, professional software platform, the use of advanced technical means to realize the unified management of the grass-roots units, personnel, and insulation tools and appliances in all regions, and to provide the enterprise “insulation tools and appliances management” “Provide a simple, unified and operable method to understand the inspection and experiment results of tools and equipment in time, and provide a firm guarantee for the safety management of insulation tools and equipment in the enterprise.
(2) Efficient: Use the powerful calculation and statistics functions of the computer to change the situation of relying on manual methods to paste the test certificate every month and unable to analyze and manage the statistics. This greatly saves labor costs and improves work efficiency.
(3) Standardization: The system can help establish standardized management procedures for insulation tools and appliances, and load specific work procedures and requirements into the database through the system, and unify the management of insulation tools and appliances in each branch according to the specifications, which is conducive to further standardization of insulation The safety management of tools and equipment ensures the time and quality of inspection and testing; improves the work efficiency of employees and enhances the effect of safety management.
3. Features of the management system
The system adopts mainstream mature technology in its realization, which effectively guarantees the stability, robustness, flexibility and safety of the application system. The main features of the introduction are as follows:
(1) The WEB-based management system adopts the B/S architecture, which avoids the disadvantages of traditional C/S architecture software that needs to be installed and maintained on a large number of client computers. System administrators only need to maintain the server side. All clients are standard IE browsers, which are very convenient to implement, maintain and upgrade.
(2) The system digitizes the information of all safety tools and instruments and stores them in RFID radio frequency identification technology tags. Using this system, you can grasp the number, types, and status of safety tools and instruments at all levels in real time; you can also understand them in a timely manner The testing and inspection of tools and equipment at all levels can facilitate the effective implementation of supervision and management functions of safety supervision departments at all levels, so that the safety management of safety tools and equipment has reached a new level on the road of informatization.
(3) The data stream can be transmitted freely in the handheld terminal system, the WEB database system and the RFID radio frequency identification technology label, and can be mutually verified.
(4) The system digitizes the information of all safety tools and instruments and stores them in RFID radio frequency identification technology tags. Using this system, the number, types, and status of safety tools and appliances at all levels can be grasped in real time; it can also be understood in a timely manner The testing and inspection of tools and equipment at all levels can facilitate the effective implementation of supervision and management functions of safety supervision departments at all levels, so that the safety management of safety tools and equipment has reached a new level on the road of informatization.
(5) The system will automatically generate the next time according to the preset safety tool test cycle and inspection cycle, and will automatically remind the test and inspection according to the pre-set reminder strategy, thereby reducing the workload of the corresponding staff and Effectively avoid errors caused by human factors.
(6) Since all safety tools and equipment business data sources in this system must be personally used to scan the safety tools and appliances on site with a handheld terminal, enter the relevant data, and upload them to the WEB system, thus effectively avoiding the previous management system There are situations in which no relevant business operations are carried out in actual applications, but business data is directly entered in the management system, so as to effectively avoid the occurrence of cheating and make the use of tools and appliances safer.
(7) Because the system adopts the B/S architecture, the data in the RFID handheld terminal (data collector) cannot be directly transferred to the database through the background program on the WEB server side, so the system adopts the self-developed ActiveX component technology to achieve the Two-way data communication is carried out in the browser with the RFID radio frequency identification technology handheld terminal.
An ActiveX component is a file that exists on the WEB server. The file contains the code to perform a certain task or a group of tasks. The component can perform common tasks, so you don’t have to create the code to perform these tasks yourself. After installing the ASP.NET environment on the WEB server, you can directly use several common components that come with it, such as Database Access components. You can also obtain optional components from third-party developers, or you can write your own components.
4. Conclusion
The use of RFID electronic tags and handheld terminals and a WEB-based tool management system can better solve the problems of power supply companies that do not have corresponding network software support for the management of power safety tools and equipment, and the monitoring is not in place. It is compared with the previous traditional methods and manual paste tests Compared with the certificate, it greatly saves manpower, improves accuracy, saves time, and makes the entire use process of electrical safety tools and appliances checkable and controllable.
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