Technical application of infrared thermometer in microwave and induction heating industry

Infrared temperature measurement technology has played 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, with continuous improvement in performance, continuous enhancement of functions, continuous increase in varieties, continuous expansion of the scope of application, and market share increasing year by year. Infrared temperature measurement technology has played 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, with continuous improvement in performance, continuous enhancement of functions, continuous increase in varieties, continuous expansion of the scope of application, and market share increasing 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 three series: portable, online and scanning, and are equipped with various options and computer software. In each series, there are various models and specifications. Among various types of thermometers with different specifications, it is very important for users to choose the correct infrared thermometer model. Infrared detection technology is a key promotion project of national scientific and technological achievements in the 'Ninth Five-Year Plan'. Infrared detection is an online monitoring (non-power-off) high-tech detection technology. It integrates photoelectric imaging technology, computer technology, and image processing technology. The emitted infrared (infrared radiation) displays its thermal image on the fluorescent screen to accurately determine the temperature distribution on the surface of the object, which has the advantages of accuracy, real-time, and speed. Any object constantly radiates infrared heat energy outside due to the movement of its own molecules, thereby forming a certain temperature field on the surface of the object, commonly known as 'thermal image'. Infrared diagnostic technology is precisely by absorbing this infrared radiation energy to measure the temperature of the surface of the device and the distribution of the temperature field, thereby judging the heating of the device. At present, there are many test equipments using infrared diagnostic technology, such as infrared thermometers, infrared thermal televisions, infrared thermal imaging cameras, and so on. Devices such as infrared thermal televisions and infrared thermal imaging cameras use thermal imaging technology to convert this invisible 'thermal image' into visible light images, which makes the test effect intuitive and highly sensitive, and can detect subtle changes in the thermal state of the device and accurately reflect it. The heating conditions inside and outside the equipment have high reliability and are very effective for detecting hidden dangers of the equipment. Infrared diagnosis technology makes reliable predictions of early fault defects and insulation performance of electrical equipment, and improves the preventive test and maintenance of traditional electrical equipment (preventive test is the standard introduced in the former Soviet Union in the 1950s) to the foreseeable state of maintenance. The development direction of modern power enterprises. In particular, the current development of large units and ultra-high voltage has put forward higher and higher requirements for the reliable operation of the power system, which is related to the stability of the power grid. With the continuous development of modern science and technology, the use of infrared condition monitoring and diagnosis technology has the characteristics of long-distance, non-contact, non-sampling, non-disintegration, and is accurate, fast, and intuitive, real-time online monitoring and diagnosis of electrical equipment Most failures (almost can cover the detection of various failures of all electrical equipment). It has attracted much attention from the power industry at home and abroad (an advanced state maintenance system commonly used abroad in the late 1970s) and has been rapidly developed. The application of infrared detection technology is of great significance for improving the reliability and effectiveness of electrical equipment, improving operating economic benefits, and reducing maintenance costs. It is a good method commonly promoted in the field of predictive maintenance at present, and it can raise the level of maintenance and the health of equipment to a higher level. Using infrared imaging detection technology can perform non-contact detection of the running equipment, photograph the temperature field distribution, measure the temperature value of any part, and diagnose various external and internal faults based on this, with real-time, remote measurement, intuitive and quantitative The advantages of temperature measurement are very convenient and effective for detecting the operating equipment and live equipment of power plants, substations and transmission lines.　 The method of using thermal imaging cameras to detect online electrical equipment is infrared temperature recording. Infrared temperature recording method is a new technology used in industry for non-destructive detection, testing equipment performance and mastering its operating status. Compared with traditional temperature measurement methods (such as thermocouples, wax pieces with different melting points, etc. placed on the surface or body of the object to be tested), thermal imaging cameras can detect the temperature of heating points in a certain distance in real time, quantitatively, and online. , It can also draw the thermal image of the temperature gradient of the equipment in operation, and the sensitivity is high, and it is not interfered by electromagnetic fields, which is convenient for field use. It can detect thermal faults of electrical equipment with a high resolution of 0.05°C in a wide range from -50°C to 3300°C, revealing heat generated by wire joints or clamps, and local hot spots in electrical equipment.　　 Infrared diagnosis technology of charged equipment is a new subject. It is a comprehensive technology that uses the heating effect of charged equipment and uses special equipment to obtain infrared radiation information from the surface of the equipment, and then judge the condition of the equipment and the nature of the defect. The application of infrared thermometers in industries such as microwave machinery, curing machines, induction heating, etc. is the product of recent technological innovations. Previously, thermocouples were used for temperature measurement or temperature control in general equipment. However, the delay, contact, susceptibility, and unavailability of thermocouples make it suitable for modern high-precision equipment. More and more restricted. Infrared thermometers can make up for the inherent shortcomings of thermocouples, so that the market for infrared thermometers is getting wider and wider.