Infrared thermal imaging technology is used in both military and civilian applications, originating in the military at the very beginning, and gradually transforming into civilian applications. In civilian use, it is generally called thermal imaging camera, which is mainly used in research and development or industrial testing and equipment maintenance, and is also widely used in fire prevention, night vision and security.
Thermal imaging camera is the use of infrared detectors and optical imaging objective lens to accept the target of the infrared radiation energy distribution pattern reflected in the infrared detector photosensitive elements, so as to obtain the infrared thermal image, this thermal image and the object surface heat distribution field corresponds to. In layman's terms, a thermal imaging camera transforms the invisible infrared energy emitted by an object into a visible thermal image. The different colors on the thermal image represent the different temperatures of the object being measured.
Basic introduction Chinese name: Infrared Thermal Camera Foreign name: Infrared Thermal Camera Main indicators: temperature range, spatial resolution, temperature measurement accuracy Operation mode: handheld, portable, online type Receive radiation mode: active reception, passive reception Development history, working principle, thermal imaging advantages, equipment composition, set the scope of application, selection advice, technical indicators, the development of the "infrared", the "infrared" is the "infrared" thermal imaging camera. The word "infrared" is derived from the word "infrared", which means beyond the red color, indicating the position of the wavelength in the spectrum of electromagnetic radiation. The word "thermography" is derived from the same root word meaning "temperature image". The origin of thermography is attributed to the German astronomer Sir William Herschel, who conducted some experiments with sunlight in the 1800's. Herschel discovered infrared radiation by passing sunlight through a prism and placing thermometers at various colors and measuring the temperature of each color with a sensitive mercury thermometer. Herschel found that the temperature increased when light beyond the red color entered a region he called "dark red heat. It wasn't until the 1960s that thermal imaging technology was used in non-military applications, and the first generation of thermal imaging cameras for civilian use began to appear - as sophisticated instruments that were gradually adopted by a wide range of industries. 1988 AGEMA revolutionized the condition monitoring market with the development of the portable, battery-operated ThermoVision 400 series. The market for condition monitoring was revolutionized. Although early thermal imaging systems were bulky, slow to collect data and had poor resolution, they were still used in industrial applications such as inspection of large transmission and distribution systems. in the late 1990's AGEMA put the first uncooled thermal imaging camera on the market, followed by FLUKE in the USA, and from then on the camera started to enter into a period of rapid growth. Due to the emergence of the first generation of thermal imaging camera to solve the problem of electric power on the connector charged temperature detection. With portable, non-contact advantages, and can visualize the temperature distribution. Soon to be widely used in electric power, equipment maintenance and other inspection and circuit research and development, materials research and development and other scientific research. In the early 21st century, with the development of thermal imaging technology, a number of thermal imaging camera manufacturers launched a second generation of thermal imaging cameras suitable for long-term online monitoring and network monitoring - thermal imaging technology began to sensor direction. The second generation of thermal imaging cameras allows 24-hour real-time monitoring of key equipment and high-risk areas. They can be linked with other equipment to form a monitoring system for large-scale networking. Subsequently, it began to be used in substation monitoring, fire prevention, security and driving assistance. After 2010, the third generation of thermal imaging cameras appeared on the market - thermal imaging technology began to be combined with the mobile Internet. The combination of thermal imaging cameras and cell phones takes advantage of the easy maneuverability of cell phones, their fast-growing processing power and mobile networking capabilities, making thermal imaging cameras easier to operate and more powerful. Moreover, the convenient and fast cloud storage and data sharing of the cell phone thermal imaging camera enables the camera to evolve from an isolated instrument and sensor to a big data thermal imaging acquisition terminal, significantly expanding the thermal imaging suite of space. With the popularization of thermal imaging technology, the civilian thermal imaging camera is also gradually from industrial, medical into the consumer field. How to make thermal imaging camera more popular application for the public has become a thermal imaging field of innovation companies need to pay attention to and solve the problem. 2017 in the United States CES released the cloud thermal image of the fourth generation of thermal imaging camera on behalf of the thermal imaging technology has begun the wisdom of the development of wisdom and the depth of fusion of inter-network development road. Cloud Thermal Image is an intelligent thermal imaging camera based on Internet service. Users only need to power up the cloud thermal imaging camera and connect it to an internet connection or a 4G internet card to view real-time thermal imaging video and receive alarms on their cell phones. Without the need for complex network setup or thermal expertise, the intelligent cloud thermal imaging camera automatically identifies fire risks and security intrusion risks. The development of the fourth generation of thermal imaging cameras brings thermal imaging technology to the mass market and opens up a new era of thermal imaging. How it works In layman's terms a thermal imaging camera converts the invisible infrared energy emitted by an object into a visible thermal image. The different colors on the top of the thermal image represent the different temperatures of the object being measured. By looking at the thermal image, the overall temperature distribution of the target can be observed, and the heat generation of the target can be studied to determine the next step in the process. Modern thermal imaging cameras work by using optoelectronic devices to detect and measure radiation and establish a correlation between the radiation and the surface temperature. All objects above absolute zero (-273°C) emit infrared radiation. A thermal imaging camera utilizes an infrared detector and an optical imaging objective to accept a graphical representation of the energy distribution of the infrared radiation of the target under test, which is reflected on the photosensitive element of the infrared detector, thus obtaining an infrared thermogram, which corresponds to the heat distribution field on the surface of the object. The optical path of an infrared camera Advantages of thermal imaging No need to touch the target to be measured Keeps the user away from danger and does not intrude on or affect the target Quickly generates an image of the thermal distribution Allows comparison of temperatures in different areas of an object Using the image, the whole target can be viewed making the thermal distribution visual and allowing later analysis. Visualize and analyze the thermal distribution Real-time echo Capture high-speed moving objects Capture images of high-frequency temperature changes Composition of the equipment The composition of the infrared camera consists of five main parts: 1, infrared lens: receiving and convergence of infrared radiation emitted by the object under test; 2, infrared detector components: the thermal radiation signal into an electrical signal; 3, the electronic components: the electrical signal processing; 4, the display components: the thermal signal processing; 4, the display components: the thermal signal processing; 4, the display components: the thermal signal processing; 4, the display components: the thermal signal processing. 4. Display assembly: converts the electrical signal into a visible image; 5. Software: processes the collected temperature data and converts it into temperature readings and images. The range of applications for thermal imaging cameras is extremely wide, and as infrared technology continues to develop and become more popular, new applications are being developed. There are several main categories of applications. PCB board heat, heat dissipation test; chip heat, heat dissipation test; chip internal temperature test; component limit test and other electronic circuit research and development or testing. Product R&D and quality testing for cell phones, air conditioners, servers, freezers, etc. Material research on composite materials, heat dissipation materials, heat insulation materials, material stress testing, etc. New energy research and testing such as solar panels, new energy batteries, charging piles, etc. Mechanical power research such as brake system, hydraulic system, traction system, transmission system, heating system, precision machining, etc. Building inspection such as leakage, hollow drum, gap, underfloor heating, etc. Production quality control for blow molding, brewing, and intracavity ulcer treatment probes. Automotive R&D and overhaul of rear windshield heating wire, tires, heated tables and chairs, engines, brake pads, LED headlights, etc. Medical research on targeted tumor therapy, breast cancer detection, burns, etc. Modern agriculture such as dairy cattle inflammation detection, hatching detection, drought and cold resistance research of plants. Circuit monitoring of transformers, disconnect switches, circuit breakers, capacitors, rectifiers, through-wall bushings, etc. Equipment testing such as distribution cabinets, motors, and servos. Key equipment testing such as distillation towers, storage tanks, reactors, heat exchangers, etc. Warehouse fire protection such as coal warehouse, oil warehouse, chemical warehouse, hazardous material warehouse, flour warehouse, biomass warehouse. Fire prevention in plants such as fermentation pools, paper mills, oil refineries, etc. Fire prevention in large spaces such as tunnels, highway bridges, forest fire prevention, etc. Port, bank, factory, prison, airport and other security monitoring. Suggestions for selection Including electronics, circuits, wafers, materials, machinery, medical and other scientific research customers are recommended to choose the third generation of thermal imaging cameras, such as three-in-one thermal imaging camera. Because of the simple operation, and has a full radiation video streaming function, with PC software temperature / time trend analysis, can monitor the dynamic changes in temperature, and even long-term detection of the aging process. If you need to see tiny objects such as wafers, you can choose to use a macro lens. Users of equipment maintenance or building inspection such as switchboards, pipelines, etc. can use the first generation of thermal imaging cameras for simple inspection. If you need to do professional preventive maintenance, it is recommended to use the third generation of thermal imaging cameras, choose with QR code scanning named thermal image function, can be used for a long time external power supply and has the function of on-line or video recording can monitor the working conditions of the equipment, the PC software has a temperature / time trend analysis function. If a group of customers need to use the camera in multiple locations and want to improve their management capabilities, the third generation camera is preferred, utilizing its cloud storage capabilities to facilitate the management and mining of the group's equipment inspection data. Transformer equipment, key equipment monitoring or production line product quality monitoring can consider the second generation of thermal imaging cameras or the fourth generation of thermal imaging cameras, with the characteristics of network transmission can be networked, it is recommended to use the products with automatic reconnection of disconnected products, such as the need to connect the line PTZ, please select the products with the PELCO-D agreement. It is also recommended to use PC software with alarm, preset position, automatic cruise and trend analysis functions. Such as coal fields, oil depots, plants, forests and other fire sets of users can use the second generation of thermal imaging cameras or the fourth generation of thermal imaging cameras, but to choose products with front-end data processing, front-end alarms and other functions, because the fire needs to be the system architecture of the temperature, the back-end computer alarms, such as network problems or server failures will lead to the paralysis of the entire system. It is recommended that on the basis of the previous selection of software with the first fire alarm point function of the product to facilitate the later analysis of the cause of the fire and the spread of the fire. If you also need to view the remote monitoring can also be selected with disconnect reconnect, PELCO-D agreement, ONVIF agreement products. The cost of the fourth generation of thermal imaging cameras is much lower and easier to deploy quickly. If used in ports, airports and other security uses it is recommended to use the second generation of cameras or the fourth generation of cameras, but also need to have disconnect reconnect, PELCO-D agreement and ONVIF agreement and other features, easy to use and maintain. The fourth generation of thermal imaging cameras sets the trend for thermal imaging technology in the future. Technical indicators 1, thermal sensitivity / NETD thermal imaging camera can distinguish between small temperature differences in the ability, which to a certain extent affects the imaging of the degree of subtlety. The higher the sensitivity, the better the imaging effect, the more able to distinguish between the failure point of the specific *** placement. 2, infrared resolution Infrared resolution refers to the detector pixels of the camera, similar to visible light, the higher the pixel, the clearer and more detailed the picture, the higher the pixel at the same time to obtain more temperature data. 3. Field of View (FOV) The horizontal and vertical angle of the image on the detector. The larger the angle, the wider the view, such as wide-angle lens. The smaller the angle to see the smaller, such as telephoto lens. So according to different occasions to choose the right lens is also quite important. 4, spatial resolution / IFOV IFOV refers to a single pixel can be imaged on the angle, because the angle is too small, so with milliradians mrad said. IFOV by the detector and the lens can be found in the lens is unchanged, the higher the pixel, the smaller the IFOV. The opposite is true for pixels, the smaller the field of view, the smaller the IFOV. At the same time, the smaller the IFOV, the clearer the imaging effect. 5, the temperature range The device can measure the minimum temperature to the highest temperature range, the range can have more than one temperature range, need to be set manually. Such as FOTRIC 226 temperature range is -20 ℃ ~ 650 ℃, the temperature range is divided into -20 ℃ ~ +150 ℃, 0 ℃ ~ 350 ℃ and 200 ℃ ~ 650 ℃. As far as possible, choose the small range that can meet the requirements of the test, if the test 60 ℃ target, select -20 ~ 150 ℃ range will be more than the choice of 0 ~ 350 ℃ range, the thermal image is more clear. 6, the full radiation thermal image video stream Save each frame of each pixel temperature data of the video stream, the full radiation video can be later temperature change analysis, but also for each frame of the picture for any temperature analysis.