In this case, the infrared lamp related parts may be damaged, or the photoresistor may be faulty.

　　 Infrared surveillance cameras are divided into ordinary infrared cameras and dot matrix infrared cameras. Dot matrix thermal imaging cameras are better than ordinary thermal imaging cameras, with longer irradiation distance, fine and clear picture quality, and longer service life than ordinary thermal imaging cameras.

　　 The working principle of the infrared camera is that the infrared light emitted by the infrared lamp is refracted on the object, and the infrared light is diffusely reflected, which is received by the surveillance camera to form a video image.

The infrared thermal imager uses an infrared emitting tube, a receiving tube and an optical imaging objective lens to receive the infrared rays of the measured target and reflect them to the photosensitive element of the infrared detector. The infrared radiation energy is converted into an electrical signal by the detector, and the output signal of the imaging device can simulate the spatial distribution of the surface temperature on the scanning target in a one-to-one correspondence. After the standard video signal is amplified, converted or transmitted to the display screen, the output signal of the imaging device can be a corresponding thermal image of the heat distribution on the surface of the object.

　　 application

　　 Infrared thermal imaging camera can perform non-contact, high-resolution temperature imaging through infrared, can generate high-quality images, can provide a large amount of information about the measurement target, and make up for the shortcomings of the human eye. Therefore, both infrared tubes and photosensitive tubes have been used in power systems, civil engineering and automobiles. , Metallurgy, petrochemical, medical and many other industries have been widely used, and the future development prospects are even more unlimited.