With the rapid development of circuit board manufacturing technology, the integration of electronic components is getting higher and higher, and the circuit is becoming more and more complex. Traditional contact diagnosis requires a lot of time and energy after failure, so the non-contact fault detection method is becoming more and more important.

Infrared thermal imager uses optical imaging lens and infrared detector to receive infrared radiation energy of the measured target, and convert infrared radiation energy into standard video signal, and display infrared thermal image through video screen. The thermal image is corresponding to the thermal distribution field on the surface of the object. It is the thermal image distribution of infrared radiation of each part of the object under test. Infrared thermal imager can accurately identify and analyze the fault area of heating. Therefore, the characteristics of non-contact accurate temperature measurement and real-time temperature distribution of infrared thermal camera make it the best tool for nondestructive flaw detection of circuit boards.

Common circuit board faults are generally divided into short circuit, open circuit or poor contact. In the short circuit, the circuit board current is larger than normal, the circuit element temperature rises, and the infrared thermal image is obviously abnormal compared with normal; When the circuit is broken or in bad contact, the current passing through the element is almost zero. At this time, the temperature is lower than normal, and the infrared thermal image is obviously abnormal compared with normal conditions. Therefore, according to the above principle can be very simple to determine the fault of the circuit board.

Yoseen Infrared developed the infrared thermal imager for the circuit board detection in the electronic industry. The thermal imager can be used for the temperature analysis of circuit elements and the temperature distribution analysis of the whole circuit field.

The circuit board detection infrared thermal imager has the following characteristics:

1) Imported uncooled focal plane detector is adopted, with resolutions of 640×480, 384×288 and 160×120. There are a variety of choices, which can be combined with the company's unique image processing algorithm to achieve clear imaging and high temperature sensitivity;

2) Supporting system software, with powerful functions, can see the temperature distribution curve of the tested object directly and in real time, and can save the image and video stream with temperature.

3) Various types of temperature measurement can be used to track the highest temperature and lowest temperature, and can be used for point temperature measurement, line temperature measurement, rectangular temperature measurement and elliptical temperature measurement, etc., and threshold alarm can be set.