Joint calibration device and calibration method for visible light camera and infrared camera

The invention discloses a visible light camera and infrared camera combined calibration device and calibration method, and the device employs a heating calibration plate which is composed of a black hollow heating plate, an LED cylindrical lamp post, a housing, a power supply, and a switch. Wherein the hollowed-out heating plate is arranged in the shell and is connected with the power supply through the shell, a plurality of through holes are uniformly formed in the hollowed-out heating plate, adaptive LED cylindrical lamp posts are arranged in the through holes, the LED cylindrical lamp posts are connected with the power supply through the shell, and the switch is used for controlling the output of the power supply to enable the hollowed-out heating plate to heat or the LED cylindrical lamp posts to emit light; when the hollow heating plate is heated, a uniform temperature difference is formed between the hollow heating plate and the through hole, so that the infrared camera can capture a clear temperature i