A thermal imager converts invisible infrared energy emitted by an object into a visible thermal image.
Different colors on the thermal image represent different temperatures of the measured object. By looking at the thermal image, we can observe the overall temperature distribution of the measured target, study the heat of the target and judge the next work.
The working principle of modern thermal imager is to use photoelectric equipment to detect and measure radiation and establish the correlation between radiation and surface temperature. All objects above absolute zero (-273℃) emit infrared radiation.
The thermal imager uses an infrared detector and an optical imaging objective to receive the infrared radiation energy distribution of the measured object and reflect it on the photosensitive element of the infrared detector, thus obtaining an infrared thermal image corresponding to the thermal distribution field on the surface of the object.
Extended data:
The white light emitted by the sun is decomposed into seven kinds of light after passing through the prism: red, orange, yellow, green, cyan, blue and purple. 1800, the British astronomer Herschel published a paper, announcing that there was a "hotline" in addition to the red light. This is what we often say now.
Line.
Infrared ray is an electromagnetic wave, and its wavelength is generally between 0.75 micron and1mm. Scientists have divided infrared rays into near infrared rays, middle infrared rays, far infrared rays and far infrared rays according to their wavelengths.
Anything in nature that is higher than MINUS 273 degrees Celsius (that is, absolute zero) will radiate infrared rays to the outside world. Infrared is invisible to the naked eye, but no matter at night or in dense fog, instruments made of infrared technology can detect heat sources such as human body and flame.
The application of infrared thermal imaging technology originated in the middle of the 20th century. It was originally a night vision device used by Nazi German army. After World War II, Texas Instruments developed the infrared aiming system (FLIR), which is also an infrared imaging device used in the military.
In 1960s, AGA company in Sweden developed an infrared thermal imager, which can not only find the heat source, but also measure its temperature. Since then, the research of infrared thermal imaging technology has made another leap.
China's infrared thermal imaging technology has also developed. Guangzhou Saite Electric Power Infrared Technology Co., Ltd. is the first high-tech enterprise in China that specializes in R&D and production of infrared thermal imaging technology. Infrared thermal imager is sometimes like a small camera, which is installed on the top of the car. You can patrol along the high-voltage line and measure the line temperature remotely to prevent fire.
As for the grain, cotton and coal piled up in the warehouse, it is more difficult for the naked eye to find hidden dangers, and the infrared thermal imager can determine how high the temperature of the target part is. If there is a fire, firefighters wear gas masks to enter the scene, and the scene is blocked by thick smoke, so it is often difficult to find the fire source and trapped people.
Infrared thermal imager can help solve this problem. Now, the application of infrared thermal imaging technology has been extended to the medical field. Because inflammation, tumor or blood vessel blockage occurs somewhere in the human body, it will affect the heat balance. The instrument can detect abnormal parts, which doctors use as a scientific basis for judging diseases.
276 women of childbearing age were tested in a hospital, and it was found that the breast temperature of 4 women was 65438 0 degrees Celsius higher than the surrounding area, and they were suspected to have breast cancer. The accuracy of clinical and pathological diagnosis reached 100%.
People's Network-Modern Fire Eye-On Infrared Thermal Imaging Technology