Infrared detection technology is a key promotion project of national ninth five-year plan scientific and technological achievements. Temperature measuring gun is a high-tech detection technology for on-line monitoring (without power failure). It integrates photoelectric imaging technology, computer technology and image processing technology. It can accurately judge the temperature distribution on the surface of the object by receiving the infrared radiation from the object and displaying its thermal image on the fluorescent screen. It has the advantages of accuracy, real-time and rapidity. Any object constantly radiates infrared heat energy due to the movement of its own molecules, thus forming a certain temperature field on the surface of the object, commonly known as "thermal image." It is by absorbing this infrared radiation energy that infrared diagnostic technology measures the temperature and temperature field distribution on the surface of the equipment, thus judging the heating situation of the equipment. At present, there are many test equipments using infrared diagnostic technology, such as infrared thermometer, infrared thermal TV, infrared thermal imager and so on. Infrared thermal TV, infrared thermal imager and other equipment use thermal imaging technology to convert this invisible "thermal image" into a visible image, which makes the test effect intuitive, has high sensitivity, can detect the subtle thermal state changes of the equipment, accurately reflect the internal and external heating conditions of the equipment, has high reliability and is very effective in finding hidden dangers of the equipment.
What's the difference between infrared thermometer and temperature measuring gun?
Infrared diagnosis technology can reliably predict the early fault defects and insulation performance of electrical equipment, and improve the preventive test and maintenance of traditional electrical equipment (preventive test is the standard introduced into the former Soviet Union in the 1950s) to predictive state maintenance, which is also the development direction of modern power enterprises. Especially with the development of large units and ultra-high voltage, the reliable operation of power system is related to the stability of power grid, which puts forward higher and higher requirements. With the continuous development and improvement of modern science and technology, infrared condition monitoring and diagnosis technology has the characteristics of long distance, non-contact, non-sampling, non-disintegration, accuracy, rapidity and intuition, and can monitor and diagnose most faults of electrical equipment online in real time (almost all kinds of faults of electrical equipment can be detected). It has attracted the attention of power industry at home and abroad (an advanced condition-based maintenance system widely used abroad in the late 1970 s) and has developed rapidly. The application of temperature measuring gun infrared detection technology is of great significance to improve the reliability and effectiveness of electrical equipment, improve the economic benefit of operation and reduce the maintenance cost. It is a good method widely popularized in the field of predictive maintenance at present, and it can also make the maintenance level and health level of equipment go up a step.
Infrared imaging detection technology can be used for non-contact detection of running equipment, photographing the distribution of its temperature field and measuring the temperature value of any part, thus diagnosing various external and internal faults. It has the advantages of real-time, telemetry, intuitive and quantitative temperature measurement, and is very convenient and effective for the detection of operating equipment and live equipment in power plants, substations and transmission lines.
The method of online detection of electrical equipment by thermal imager is infrared temperature measurement. Infrared temperature recording method is a new technology used for nondestructive testing, testing equipment performance and mastering its running state in industry. Compared with the traditional temperature measurement methods (such as thermocouples and wax sheets with different melting points placed on the surface or body of the measured object), the thermal imager can detect the temperature of hot spots in real time, quantitatively and online within a certain distance, and can also draw a thermal image of the temperature gradient of the running equipment through scanning, which has high sensitivity, is not disturbed by electromagnetic fields and is convenient for field use. It can detect thermal-induced faults of electrical equipment in a wide range of -20℃ ~ 2000℃ with a high resolution of 0.05℃, and reveal things such as heating of wire joints or clamps and local hot spots in electrical equipment.
Infrared diagnosis technology of live equipment is a new subject. It is a comprehensive technology that uses the thermal effect of live equipment to obtain infrared radiation information from the surface of the equipment through special equipment, and then judges the condition and defect nature of the equipment.