PCB News - What needs to be paid attention to for PCBA board intelligent detection

What needs to be paid attention to for PCBA board intelligent detectionEstablish relevant application software on the PCB board and adopt the idea of virtual instrument, that is, realize various functions of traditional instruments through software, including oscilloscope, signal generator, and various mathematical processing of collected data. During the test, a digital signal is given through the test software.

The PCB board test system will have a new design idea. The design idea of an automatic test system based on the USB bus and a virtual instrument will be adopted to give full play to the role of the computer. The idea of replacing the traditional instrument with a computer as much as possible, thereby reducing the size of the instrument The volume of itself reduces the development cost, thereby improving the efficiency of development.

After D/A conversion, the analog excitation signal required for the test is applied to the test system, and then sent from the test circuit to the switch matrix through the test bus. The switch matrix is connected to the switch matrix and is controlled by the microprocessor to turn on and off. The test PCB board is fixed on the needle bed, the excitation signal is applied to the corresponding position of the printed circuit board, the response is measured by the test circuit, and the collected analog quantity is sent to the core control. After A/D conversion, the corresponding The digital quantity is fed back by the software on the PCB machine and processed by the PCB machine to determine whether the PCB board is qualified.

The online test technology has broken through the previous method of using the human eye to detect the circuit board. The online test technology has high efficiency and low missed detection rate, and realizes the automation of the detection field. This detection system adopts the idea of combining with virtual instruments, which reduces the design of hardware and reduces the cost of the entire system.

The basic method of on-line testing of PCB board analog components and the testing method of diodes and transistors. This testing system is suitable for the application of small and medium-sized enterprises. It reduces the number of unqualified products entering the next process, thereby reducing the amount of product rework, improving production efficiency, reducing the total cost of manufacturing, and increasing the profit of the enterprise. It is currently a widely used testing technology and is an efficient, High-speed, high-precision detection method.

At present, PCB boards are used in the field of automatic testing of printed circuit boards with a wide range of tests, including testing without components and testing with components. Currently, the more commonly used test methods are: continuity testing, in-circuit testing, and functional testing, Edge testing, optical testing and X-ray inspection, etc. On-line testing is based on the specific characteristics of the PCB board, selecting appropriate testing methods to combine one or more processes, complementing each other's strengths, and comprehensively using them. At present, the country has higher and higher requirements for environmental protection and greater efforts in link governance. This is a challenge but also an opportunity for PCB factories. If PCB factories are determined to solve the problem of environmental pollution, then FPC flexible circuit board products can be at the forefront of the market, and PCB factories can get opportunities for further development.
The Internet era has broken the traditional marketing model, and a large number of resources have been gathered together to the greatest extent through the Internet, which has also accelerated the development speed of FPC flexible circuit boards, and then as the development speed accelerates, environmental problems will continue to appear in PCB factories. In front of him. However, with the development of the Internet, environmental protection and environmental informatization have also been developed by leaps and bounds. Environmental information data centers and green electronic procurement are gradually being applied to the actual production and operation fields.