Infrared temperature measurement technology plays an important role in the production process, product quality control and monitoring, equipment online fault diagnosis and safety protection, and energy conservation. In the past 20 years, non-contact infrared thermometers have developed rapidly in technology, performance has been continuously improved, functions have been continuously enhanced, varieties have been increasing, the scope of application has also been continuously expanding, and market share has increased year by year. Compared with contact temperature measurement methods, infrared temperature measurement has the advantages of fast response time, non-contact, safe use, and long service life. Non-contact infrared thermometers include portable, on-line and scanning three series, and with a variety of options and computer software, each series in a variety of models and specifications. In various specifications of various types of thermometers, the correct choice of infrared thermometer model is very important for the user.
Infrared detection technology is a key promotion project of the National Science and Technology Achievements of the “Ninth Five-Year Plan”. Infrared detection is an on-line monitoring (non-blackout) type high-tech detection technology. It integrates optoelectronic imaging technology, computer technology, and image processing technology into one, through receiving objects. The emitted infrared rays (infrared radiation) show its thermal image on the fluorescent screen to accurately determine the temperature distribution on the surface of the object, which is accurate, real-time, and fast. Because of the movement of its own molecules, any object constantly emits infrared heat energy to form a certain temperature field on the surface of the object, commonly known as “thermal image”. Infrared diagnostic technology precisely absorbs this infrared radiation energy, measures the temperature and temperature field distribution of the surface of the device, and judges the heating condition of the device. At present, there are many test equipments that use infrared diagnostic technology, such as infrared thermometers, infrared heat televisions, infrared thermal imagers, and so on. Infrared thermal television, infrared thermal imagers and other devices use thermal imaging technology to convert this invisible “thermal image” into a visible light image, so that the test effect is intuitive, high sensitivity, can detect the subtle thermal state changes of the device, accurately reflect The internal and external heat generation of the equipment is highly reliable, and it is very effective in detecting potential equipment hazards.
Infrared diagnostic technology makes reliable predictions of early faults and insulation performance of electrical equipment, and improves the preventive maintenance of traditional electrical equipment (prevention testing is the introduction of former Soviet Union standards in the 1950s) to the maintenance of predictable conditions. The direction of the development of modern power companies. In particular, the current development of large-scale generating units and ultra-high voltages imposes increasingly high requirements on the reliable operation of the power system due to its relation to the stability of the power grid. With the continuous development and maturity of modern science and technology, the use of infrared state monitoring and diagnostic technology has long-distance, no contact, no sampling, no disintegration, but also has the characteristics of accuracy, speed, and intuitive, real-time online monitoring and diagnosis of electrical equipment Most failures (detection of almost all failures of all electrical equipment). It is highly valued by the domestic and foreign power industries (an advanced state-of-service maintenance system commonly used abroad in the late 1970s) and has developed rapidly. The application of infrared detection technology is of great significance to improving the reliability and effectiveness of electrical equipment, improving operational economic benefits, and reducing maintenance costs. It is a very good means to popularize in the field of predicting maintenance, and it can also make the level of maintenance and the health level of equipment up one step.
The use of infrared imaging detection technology enables non-contact detection of a running device, captures the distribution of its temperature field, measures the temperature of any part, and diagnoses a variety of external and internal faults with real-time, telemetry, intuition, and quantification. The temperature measurement and other advantages are very convenient and effective for detecting the operation equipment and live equipment of power plants, substations and transmission lines. The method of detecting on-line electrical equipment using a thermal imager is infrared temperature recording. Infrared temperature recording is a new technology that is used in industry to non-destructively detect, detect equipment performance and master its operating status. Compared with traditional temperature measurement methods (such as thermocouples, wax chips with different melting points, etc. placed on the surface of the measured object or in vivo), the thermal imager can detect the temperature of the hot spot at a certain distance in real time, quantitatively, and online. It can also draw the temperature gradient thermal image of the equipment during operation, and it has high sensitivity and is not affected by the electromagnetic field, which is convenient for on-site use. It can detect thermal failures of electrical equipment with a high resolution of 0.05°C over a wide range from -50°C to 3300°C, revealing heat such as wire joints or clamps, and localized hot spots in electrical equipment.
The infrared diagnostic technology of charged devices is a new discipline. It is a comprehensive technology that utilizes the heating effect of live equipment, uses special equipment to obtain infrared radiation information from the surface of the equipment, and then judges the condition of equipment and the nature of defects.
The application of infrared thermometers in the microwave machinery, fixing machine, induction heating and other industries is the product of recent technological innovations. Before the general equipment is used thermocouple temperature measurement or temperature control, but the thermocouple time delay, contact, vulnerable to interference, can not be in the use of disadvantages, so that its use in modern high-precision equipment More and more limited. Infrared thermometers can make up for the innate deficiencies of thermocouples, so that the market for infrared thermometers is getting wider and wider.

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