0 introduction
Development of the electricity supply network is extremely rapidly and rationalizing the grid structure is, today, the State power system reliability of increasingly high demands.
Infrared temperature measurement technology to power industrial equipment status detection areas has been widely used. But infrared thermal image data in bulk and transmission limited between more and more prominent, and development to date, China Mobile powerful GPRS wireless communication network for this issue provides a good solution. A study on transmission lines, therefore, infrared temperature measurement online is an urgent and demanding task. Transmission line of infrared thermal image online measurement system using advanced infrared thermal imaging technology, the transmission line running temperature for online condition monitoring; and use the existing GPRS wireless communication network to achieve thermal image data transfer with coverage without increasing transmission equipment and line characteristics, especially suitable for remote cannot be mounted circuit transmission line on the local situation. System image acquisition and transmission terminal by infrared thermography acquisition module, image-data compression module, GPRS communication module, image data transfer modules and solar-powered devices and other components, including image data compression module using JPEG hardware compression technology, static image compression, minimizing the amount of data for network transmission, conserves network resources, improving the speed of transmission of the picture. In order to address the design of high-speed image capture and compression control and data transfer speed is relatively slow variable rate of sampling, the system hardware structure using micro-controller with programmable logic controller chip (MCU + CPLD) programme, all child features a standard generic modules completed, reduced system complexity and improve the overall performance of the system, users can take advantage of the PC via the Internet on thermography remote acquisition and site monitoring.1 infrared thermography to transmission line temperature monitoring model
1.1 infrared imaging technology
Infrared thermography is detecting transmission line of various electrical equipment surface radiation of non-human eyes can see infra-red technology.
It reflects the device surface of infrared radiation fields, i.e. the temperature field. And depending on the device surface temperature, measurement device a part of the average temperature. Is a kind of passive, non-contact detection means. Infrared camera is using the technology of production testing equipment, currently in power equipment diagnostics fields to be widely applied. Its simple work diagram shown in Figure 1.1.2 infrared thermography to transmission line temperature monitoring
Transmission line of temperature by infrared images are effectively reflected.
Infrared imaging is the only one can be hot information instant visualization and validation of diagnostic techniques. Thermal infrared imager can reveal thermal failure, and through non-contact temperature measurement a qualitative analysis of them, in the professional infrared analysis software with the help of a few seconds to automatically complete analysis report.All use or emission energy equipment before the failure occurs.
Ensure the operational reliability of the electrical equipment is critical to the effective management of energy resources, and infrared thermography is a preventive maintenance areas most effective testing tool that able to equipment failure, quickly, accurately and securely find fault. In electrical contacts fails before the timely detection and repair it, you can avoid transmission line for high-temperature heat failure power blackout caused by the high price.Thermal infrared imager can guide preventive maintenance experts on the operation of electrical equipment for accurate judgment.
You can measure the temperature value is compared with the historical temperature, or similar devices with the same time the temperature reading to accurately determine whether a significant temperature rise, will result in failure to bring production parts. Mainly used for power preventive maintenance and other purposes. Especially for transmission line preventative maintenance, testing, has great advantages.2 transmission line of infrared thermal image online measurement system implementations
2.1 system works
Installation in front of the field of power transmission line terminal using high-precision digital temperature sensor on the environmental temperature parameter value acquisition; the use of high-precision infrared alignment required temperature monitoring of electrical equipment.
Front-end system timing and acquisition to all kinds of electrical equipment for temperature distribution in thermal imaging, data transmitted to the circuit, circuit system after analysis processing after thermal image compression and packaging process, and then through GPRS wireless network to send to the monitoring center of computer data on the server. Data server to install the appropriate application software program for automatic processing of data, mainly through thermography of receive and extract the restore, then to the form of images and graphics will be all kinds of electrical equipment for temperature distribution in an intuitive display on the client side, the different temperature displayed in different colors. System combines data software system and various correction theory model of various electrical equipment of hot defects and a failed State, promptly gives diagnosis information, effective prevention of transmission lines and high temperature heat failure. The system integrates the environment temperature monitoring and transmission line temperature distribution online infrared monitoring and use strong existing China Mobile GPRS wireless communication network for real-time data transmission, the transmission line temperature status monitoring.[1] [2] [3] [4]
No comments:
Post a Comment