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Compared with contact temperature measurement method, infrared temperature measurement has the advantages of fast response time, non-contact, safe use and long service life. It can image the whole circuit. Compared with the detection of infrared point temperature instrument, the infrared thermal imager can detect the whole circuit parts comprehensively, and can visually see the heat distribution of the whole circuit board. In this way, we can have a comprehensive understanding in the design, so as to make appropriate improvements.
In maintenance occasions, the thermal imager often can quickly locate the short circuit / open circuit point in the board without circuit diagram for further processing. In electrothermal engineering, there is no need to touch or power off. Thermal images are captured by infrared thermal imager, and detailed thermal analysis is carried out by infrared analysis software.
Characteristics of infrared thermal imager in electronic industry：
■ It can be monitored at any time without contact, power failure, sampling and disassembly.
■ It can realize rapid scanning and imaging, with fast, sensitive, visual and intuitive image display, high monitoring efficiency and low labor intensity.
■ Passive detection is adopted, which does not affect the working state of the target circuit board, and is simple and convenient.
■ It is convenient for computer analysis and intelligent management.
■ Infrared diagnosis is widely used, with high benefit and investment ratio.
■ Infrared detection is conducive to the state management of electronic circuit integration.
■ Infrared on-line monitoring does not require detailed information drawings of components. The inspectors do not need to have strong professional skills, nor do they need to conduct in-depth analysis of the circuit. They can quickly and accurately judge the faulty components or circuit circuits, and can timely diagnose hidden troubles according to the formulated infrared fault standards, so they can effectively avoid sudden failures of electronic equipment.
■ The operation is simple, convenient and safe. In the case of live detection, infrared detection is not only safe and convenient, but also has low requirements for detection conditions and environment.
Electronic equipment usually focuses on the detection parts
Resistors, capacitors, diodes, triodes, etc. are thermal defect prone electronic devices.
Module circuit, such as power drive circuit, data acquisition circuit and other modules.
Heat distribution of thermal devices such as heat dissipation modules.
Examples of infrared thermal imaging technology in LED products
Research and development
1、 LED module drive circuit
In the research and development of LED products, engineers are required to design some driving circuits, such as rectifier circuit modules. Using the thermal imager, engineers can quickly and easily find the temperature difference on the circuit, which is convenient to improve the circuit design.
2、 LED light source semiconductor chip heating
利用热像仪，工程师可以根据得到的光源半导体芯片发热红外热图，分析出其芯片在工作时的温度，以及温度的分布情况，在此基础，达到提高LED产品寿命的目的。
Quality management
1、 Semiconductor lighting: uniformity of packaged LED
By capturing the LED packaging process of the production line with the thermal imager, modifying the parameters and improving the necking process, the product yield can be effectively improved and the cost can be reduced.
2、 Temperature management of LED detection chip before packaging
The detection of temperature before LED chip packaging can avoid the abnormal temperature of the chip after packaging and reduce the scrap rate.
Functions and characteristics of electronic detection software
The thermal imager transmits the thermal imaging video of the target circuit board to the computer through USB cable or network cable. The computer software compares the thermal image video with the standard thermal image video in the database through the specific analysis tool set by the user, so as to obtain the fault difference points. The software provides point, line and surface (rectangle, circle, etc.) analysis tools.
The software will divide the area or graphic area according to the user's settings, and compare the temperature difference value of the same area in the thermal image video of the circuit board to be tested with the standard thermal image video in the database. The user can select the maximum temperature or average temperature value of the area to calculate the temperature difference or temperature appreciation.
Features of software
1、 Custom report template
The report template is used to generate the alarm report. Users can design the layout and style of the report according to the actual requirements, and finally generate the PDF report.
2、 Optional detection mode
When testing electronic components, different methods can be selected according to different situations: real-time detection mode and video detection mode. After entering the real-time detection mode, the current screen is displayed as real-time video. When the user selects video detection and enters the video detection mode, the left side is the standard video and the right side is the video to be detected.
3、 Image fusion technology
By adjusting the fusion and comparison of visible light image and infrared image, the fault point can be identified and located quickly, and the work efficiency can be greatly improved (the fusion setting of the real-time window can be carried out only in real-time monitoring).
4、 Alarm setting function
The default alarm setting of the system is the alarm setting value of standard video recording, and the user can also manually change the corresponding temperature difference value.
Maximum temperature difference: the difference between the maximum temperatures of two identical areas / analysis tools
Average temperature difference: the difference between the average temperatures of two identical areas / analysis tools
Temperature rise difference value: the difference between the temperature rise of two same areas / analysis tools
5、 Automatically generate alarm reports
After an alarm occurs, when the detection stops in the difference screen, the system automatically generates a PDF alarm report in the folder directory specified by the user.
