CN204964698U - A circuit board inspection system - Google Patents

Abstract

The utility model relates to a circuit board detecting system, including host computer and at least one detection module, every detection module all with the host computer connection, the circuit board that awaits measuring is connected with the detection module one-to-one. The detection module comprises a main control unit circuit, a conditioning circuit, an interface circuit and a power supply circuit, wherein the circuit board to be detected is connected with the interface circuit, the conditioning circuit and the main control unit circuit are sequentially connected, the main control unit circuit is connected with an upper computer, and the power supply circuit is respectively connected with the interface circuit, the conditioning circuit and the main control unit circuit. The utility model discloses a circuit board detecting system, detection method are quick, practical, both applicable quick detection on the production line of mill, have taken into account and have equipped because of different operating condition arouse that the circuit board fault diagnosis under the repair environmental change is quick, press close to formula guarantee to carry the support, behind the extension wireless network transmission module, can also realize under mill's assembly line and the field environment, carry out real-time detection to circuit board/equipment in the region.

Description

A circuit board inspection system

technical field

The utility model relates to the field of fault diagnosis of electronic technology, in particular to a circuit board detection system.

Background technique

At present, circuit board fault diagnosis and technologies mainly include functional test technology, online test technology, infrared thermal imaging test technology, simulation test technology and boundary scan test technology. Among them, the basic principle of the functional test technology is to send excitation signals or test patterns to the tested board through the edge connector of the circuit board to make the tested circuit board enter the working state, and at the same time receive and analyze the response data from the circuit board to verify whether meet the required functions. The advantage is that it will not affect the reliability of the devices on the board. The disadvantage is that the development cycle is long and it is difficult to deal with multiple faults. Both online testing technology and infrared thermal imaging testing technology require the system to be tested online when the system is working. It is necessary to develop a detection excitation source and a controlled source for each test object. The volume is large, and the test result data cannot accurately locate the fault. Boundary scan test technology is mainly aimed at circuit boards with multi-layer manufacturing technology and integrated circuit packaging, which is not suitable for circuit board diagnosis of faulty modules or faulty parts; while simulation test technology is mainly used for testing circuit boards with microprocessors , which has great requirements on the site and working environment, and is suitable for large-volume, assembly-line embedded hardware circuit board testing.

Using any one of the above-mentioned testing techniques alone cannot play a role in modularizing and efficiently performing functional modular fault diagnosis on equipment circuit boards, let alone realize rapid detection on the factory production line and repair of equipment in battlefield and field environments. The portability and applicability of rapid fault diagnosis of valuable equipment circuit boards cannot meet the requirements of the modern combat environment for equipment emergency repairs close to equipment.

Utility model content

The technical problem to be solved by the utility model is to provide a circuit board detection system for the deficiencies of the above-mentioned prior art, which can quickly, stably and accurately complete the fault diagnosis of different circuit boards in the factory, in the field, and in the battlefield environment. It can also expand the wireless networking function of multiple testing and identification systems to adapt to the fault diagnosis of multiple circuit boards in the area at the same time.

The technical scheme of the utility model for solving the above-mentioned technical problems is as follows: a circuit board detection system includes a host computer and at least one detection module, each of the detection modules is connected with the host computer, and the circuit board to be tested is connected to the detection module. The modules are connected in one-to-one correspondence.

Wherein, the detection module includes a main control unit circuit, a conditioning circuit, an interface circuit and a power supply circuit, the circuit board to be tested is connected to the interface circuit, the interface circuit, the conditioning circuit and the main control unit circuit are connected in sequence, and the The main control unit circuit is connected to the upper computer, and the power supply circuit is respectively connected to the interface circuit, the conditioning circuit and the main control unit circuit.

The beneficial effects of the utility model are: a circuit board detection system of the utility model has the advantages of simple design and development, low cost, fast and practical detection method, which can be applied to the rapid detection on the factory production line, and can also be applied to the battlefield and the field. Rapid fault diagnosis of equipment circuit boards with repair value in the environment, taking into account the rapid and close guarantee and transportation support of circuit board fault diagnosis under the change of repair environment caused by different operating conditions of equipment. After expanding the wireless network transmission module, it can also realize real-time detection of circuit boards/equipment in the area under the numerous assembly lines in the factory and the complicated field and battlefield environment.

On the basis of the above technical solution, the utility model can also be improved as follows:

Further: the conditioning circuit includes a signal excitation unit, a sampling unit and a signal processing unit, the input end of the signal excitation unit is connected to the output end of the main control unit circuit, and the output end of the signal excitation unit is connected to the interface The input end of the circuit is connected, the input end of the sampling unit is connected to the output end of the interface circuit, the output end of the sampling unit is connected to the input end of the signal processing unit, the output end of the signal processing circuit is connected to the The input end of the main control unit circuit is connected.

The beneficial effect of the above further solution is: the excitation signal matching the circuit board to be tested can be generated by the excitation unit, and the sampling unit and the signal processing unit are both used to preprocess the response signal of the circuit board to be tested, so that Subsequent testing results are more accurate.

Further: the signal excitation unit includes a digital excitation circuit and an analog excitation circuit, and the digital excitation circuit and the analog excitation circuit are connected in parallel between the main control unit circuit and the interface circuit.

The beneficial effect of the above further scheme is: the digital excitation circuit generates a digital excitation signal matching the circuit board under test according to the setting instruction, and the analog excitation circuit is used to generate a digital excitation signal matching the circuit board under test according to the setting instruction. board to match the analog excitation signal. In this way, the Zhengege circuit board detection system has strong versatility, and can not only detect analog electrical parameters of multiple circuit boards to be tested, but also detect digital electrical parameters.

Further: the interface circuit includes an I/O expansion circuit and an interface selection circuit, the I/O expansion circuit is used to connect with the circuit board to be tested, and the interface selection circuit is used for the electrical input of each channel, Output properties are set.

The beneficial effect of the above further scheme is that different channel parameters are set according to different circuit boards to be tested, which facilitates the interface circuit to match different circuit boards to be tested.

Further: the main control unit circuit is connected with the host computer through a data bus.

Further: it also includes a wireless transmission module, and the data information transmission is realized between the main control unit circuit and the host computer through the wireless transmission module.

The beneficial effect of the above further solution is that: through the wireless transmission module, troubles caused by wiring can be reduced during outdoor detection.

Further: it also includes a packaging box with the same number as the detection modules, the detection modules are arranged in the packaging box, and a portable handle is provided on one side of the packaging box.

The beneficial effect of the above further solution is: the waterproof and shockproof function can be realized through the packing box, and the portable movement can be realized through the portable handle at the upper end of the packing box.

Further: the packing box is made of insulating material.

Further: the upper computer is a PC.

Description of drawings

FIG. 1 is a schematic structural diagram of a circuit board detection system of the present invention.

detailed description

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

As shown in Figure 1, a schematic structural diagram of a circuit board detection system, including a host computer and at least one detection module, each of the detection modules is connected to the host computer, and the circuit board to be tested corresponds to the detection modules one by one connect.

Wherein, the detection module includes a main control unit circuit, a conditioning circuit, an interface circuit and a power supply circuit, the circuit board to be tested is connected to the interface circuit, the interface circuit, the conditioning circuit and the main control unit circuit are connected in sequence, and the The main control unit circuit is connected to the upper computer, and the power supply circuit is respectively connected to the interface circuit, the conditioning circuit and the main control unit circuit.

In this embodiment, the conditioning circuit includes a signal excitation unit, a sampling unit and a signal processing unit, the input end of the signal excitation unit is connected to the output end of the main control unit circuit, and the output end of the signal excitation unit is connected to the The input end of the interface circuit is connected, the input end of the sampling unit is connected to the output end of the interface circuit, the output end of the sampling unit is connected to the input end of the signal processing unit, and the signal processing circuit The output end is connected with the input end of the main control unit circuit. An excitation signal matching the circuit board to be tested can be generated by the excitation unit, and both the sampling unit and the signal processing unit are used to preprocess the response signal of the circuit board to be tested, so that subsequent detection results are more accurate.

In this embodiment, the signal excitation unit includes a digital excitation circuit and an analog excitation circuit, and the digital excitation circuit and the analog excitation circuit are connected in parallel between the main control unit circuit and the interface circuit. The digital excitation circuit generates a digital excitation signal matching the circuit board to be tested according to the setting instruction, and the analog excitation circuit is used to generate an analog excitation signal matching the circuit board to be tested according to the setting instruction. In this way, the whole circuit board detection system can be highly versatile, and can not only detect analog electrical parameters of multiple circuit boards to be tested, but also detect digital electrical parameters.

Specifically, the main control unit circuit board is divided into functional modules, units or channels according to the standard performance parameters of the circuit board to be tested, and generates setting instructions; The digital excitation signal and the analog excitation signal are sent to the circuit board under test, the circuit board under test generates corresponding signals according to the digital excitation signal and the analog excitation signal, and the conditioning circuit performs level conversion, amplification, and Calibrate and filter to obtain the real-time performance parameters of the circuit board to be tested and send them to the main control unit circuit through the interface circuit; The tree analysis process locates the functional module, unit or channel where the fault of the circuit board under test is located, generates a test report and sends it to the host computer, and the host computer is used to read and display the test report.

Preferably, the interface circuit includes an I/O expansion circuit and an interface selection circuit, the I/O expansion circuit is used for connecting with the circuit board to be tested, and the interface selection circuit is used for electrical input and output of each channel properties are set. In the actual detection process, we can set different channel parameters according to different circuit boards to be tested, so as to facilitate the interface circuit to match different circuit boards to be tested.

The main control unit circuit is connected with the host computer through a data bus.

Preferably, the circuit board detection system of the present invention further includes a wireless transmission module, and data information transmission is realized between the main control unit circuit and the host computer through the wireless transmission module. Through the wireless transmission module, troubles caused by wiring can be reduced during outdoor detection. What needs to be pointed out here is that the wireless networking expansion function can be realized by connecting multiple circuit board detection systems to the host computer respectively through the wireless modules.

In this embodiment, in order to prevent external water vapor and vibration, we provide a packaging box for the detection module, the detection module is arranged in the packaging box, and a portable handle is provided on one side of the packaging box. The waterproof and shockproof function can be realized through the packing box, and the portable movement can be realized through the portable handle on the upper end of the packing box. The packaging box is made of insulating material to avoid damage to the detection module due to short circuit.

In this embodiment, the upper computer is a PC. Of course, other terminals with interactive functions can also be selected, which is not limited here.

The circuit board detection system of the utility model has the advantages of simple design and development, low cost, fast and practical detection method, and can be applied not only to the rapid detection on the factory production line, but also to the equipment with repair value in the battlefield and field environment. The rapid fault diagnosis of the circuit board takes into account the rapid fault diagnosis of the circuit board under the change of the repair environment caused by the different operating conditions of the equipment, and the close guarantee and transportation support. After expanding the wireless network transmission module, it can also realize real-time detection of circuit boards/equipment in the area under the numerous assembly lines in the factory and the complicated field and battlefield environment.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (9)

1. A circuit board detection system, characterized in that: comprise an upper computer and at least one detection module, each of the detection modules is connected with the upper computer, and the circuit board to be tested is connected in one-to-one correspondence with the detection module; The detection module includes a main control unit circuit, a conditioning circuit, an interface circuit and a power supply circuit, the circuit board to be tested is connected to the interface circuit, the interface circuit, the conditioning circuit and the main control unit circuit are connected in sequence, and the main control unit The unit circuit is connected with the upper computer, and the power supply circuit is respectively connected with the interface circuit, the conditioning circuit and the main control unit circuit. 2. A circuit board detection system according to claim 1, characterized in that: the conditioning circuit includes a signal excitation unit, a sampling unit and a signal processing unit, the input end of the signal excitation unit is connected to the main control unit circuit connected to the output end of the signal excitation unit, the output end of the signal excitation unit is connected to the input end of the interface circuit, the input end of the sampling unit is connected to the output end of the interface circuit, the output end of the sampling unit is connected to the The input end of the signal processing unit is connected, and the output end of the signal processing circuit is connected with the input end of the main control unit circuit. 3. A circuit board detection system according to claim 2, characterized in that: the signal excitation unit includes a digital excitation circuit and an analog excitation circuit, and the digital excitation circuit and the analog excitation circuit are connected in parallel to the main control unit circuit between the interface circuit. 4. A kind of circuit board detection system according to claim 1, is characterized in that: described interface circuit comprises I/O expansion circuit and interface selection circuit, and described I/O expansion circuit is used for being connected with circuit board to be tested, The interface selection circuit is used to set the electrical input and output properties of each channel. 5 . The circuit board testing system according to claim 1 , wherein the main control unit circuit is connected to the host computer through a data bus. 6 . 6 . The circuit board detection system according to claim 1 , further comprising a wireless transmission module, and the data information transmission is realized between the main control unit circuit and the host computer through the wireless transmission module. 7 . 7. A circuit board inspection system according to claim 1, characterized in that: it also includes a packing box with the same number as the detection modules, the detection modules are arranged in the packing box, and one side of the packing box Features a carrying handle. 8. A circuit board inspection system according to claim 7, wherein the packing box is made of insulating material. 9. A circuit board inspection system according to any one of claims 1 to 8, characterized in that: the upper computer is a PC.