CN214539891U - Intelligent automatic test system for printed circuit board - Google Patents
Intelligent automatic test system for printed circuit board Download PDFInfo
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- CN214539891U CN214539891U CN202120020101.0U CN202120020101U CN214539891U CN 214539891 U CN214539891 U CN 214539891U CN 202120020101 U CN202120020101 U CN 202120020101U CN 214539891 U CN214539891 U CN 214539891U
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Abstract
The utility model discloses an intelligent automatic test system of printed circuit board, include: the CPU core board is connected with the communication conversion board testing unit, the signal detection board testing unit and the control circuit board testing unit, and the communication conversion board testing unit, the signal detection board testing unit and the control circuit board testing unit are connected with the communication conversion board to be tested, the signal detection board and the control circuit board through the PDS interface board. The utility model is used for printed circuit board's test, with the categorised test of classifying for communication converter plate, signal detection board and circuit control board of printed circuit board, the portability is good, and degree of automation is high, has both avoided manpower resources's waste, has carried inconvenient scheduling problem during the use, has avoided manual measurement's error again, can improve production efficiency greatly.
Description
Technical Field
The utility model relates to a relevant technical field of intelligent test specifically is an automatic test system of printed circuit board intelligence.
Background
The intelligent automatic test equipment for the printed circuit board is equipment essential for production personnel to judge the performance and the function of the printed circuit board, and has the characteristics of automation, portability and the like. Because the printed circuit boards with different functions and types are tested by the unified test system, the adverse problems of signal deviation and the like in the test process of the circuit boards with different types are caused, and the test result is adversely affected.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an automatic test system of printed circuit board intelligence to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
an intelligent automatic test system for printed circuit boards, comprising: the CPU core board is connected with the communication conversion board testing unit, the signal detection board testing unit and the control circuit board testing unit, and the communication conversion board testing unit, the signal detection board testing unit and the control circuit board testing unit are connected with the communication conversion board to be tested, the signal detection board and the control circuit board through the PDS interface board.
As a further aspect of the present invention: the CPU core board adopts an LLDSP-28335-A3 core board.
As a further aspect of the present invention: the communication conversion board test unit, the signal detection board test unit and the control circuit board test unit respectively comprise a board card power supply input pin internal resistance measurement and power supply circuit to be tested, an AD conversion circuit, an AD conditioning circuit, a signal switching circuit and a power supply conversion circuit, wherein the board card power supply input pin internal resistance measurement and power supply circuit to be tested is used for measuring the internal resistance between the power supply input pins of the board card to be tested before being electrified; the AD conversion circuit is used for acquiring the positive level and the negative level of each point in the test requirement; the AD conditioning circuit is used for conditioning the positive level and the negative level of each pin in the test requirement, conditioning the positive level and the negative level by signals and sending the positive level and the negative level to the AD sampling circuit, and the signal switching circuit is used for switching test channels of each tested signal.
As a further aspect of the present invention: the AD conversion circuit adopts an AD7606 chip.
As a further aspect of the present invention: the signal switching circuit comprises an analog quantity switching circuit and a digital quantity switching circuit, wherein the analog quantity switching circuit is used for switching the positive level and the negative level of the board card to be tested, and switching the positive level and the negative level and the high level and the low level of the board card to be tested and then sending the switched positive level and the switched negative level to the AD conditioning circuit; the digital quantity switching circuit is used for switching 2V voltage and-2V voltage and inputting the switched voltage to each test pin.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model is used for printed circuit board's test, with the categorised test of classifying for communication converter plate, signal detection board and circuit control board of printed circuit board, the portability is good, and degree of automation is high, has both avoided manpower resources's waste, has carried inconvenient scheduling problem during the use, has avoided manual measurement's error again, can improve production efficiency greatly.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the core board of the CPU of the present invention.
Fig. 3 is the utility model discloses well integrated circuit board power input foot internal resistance that awaits measuring measures and supply circuit's circuit schematic diagram.
Fig. 4 is a schematic circuit diagram of the AD conversion circuit of the present invention.
Fig. 5 is a schematic circuit diagram of the AD conditioning circuit of the present invention.
Fig. 6 is a schematic circuit diagram of the analog quantity switching circuit of the present invention.
Fig. 7 is a schematic circuit diagram of the digital quantity switching circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, an intelligent automatic test system for a printed circuit board includes: the CPU core board is connected with the communication conversion board testing unit, the signal detection board testing unit and the control circuit board testing unit, and the communication conversion board testing unit, the signal detection board testing unit and the control circuit board testing unit are connected with the communication conversion board to be tested, the signal detection board and the control circuit board through the PDS interface board.
As shown in fig. 2, the CPU core board adopts an LLDSP-28335-a3 core board, the board DSP adopts TMS320F28335, the chip master frequency CAN reach 150MHz, a 256K × 16 Flash memory, a 34K × 16 SARAM, 12-bit 2 8-channel ADCs, 88 independent programmable multiplexing general purpose input/output (GPIO) pins, a 2-channel CAN module, 1 SPI module, 3 SCI modules, 1I 2C, and the system clock operating frequency is 24 MHz.
The communication conversion board test unit, the signal detection board test unit and the control circuit board test unit respectively comprise a board power supply input pin internal resistance measurement and power supply circuit to be tested, an AD conversion circuit, an AD conditioning circuit, a signal switching circuit and a power supply conversion circuit, wherein the board power supply input pin internal resistance measurement and power supply circuit to be tested is mainly used for measuring the internal resistance between power supply input pins of the board to be tested before the board to be tested is electrified, so that the board to be tested is ensured not to have short circuit before the power supply is electrified, after the internal resistance test of the power supply pins meets the requirement, the electrification is controlled by software, and the circuit principle is as shown in figure 3; the AD conversion circuit is used for acquiring the positive level and the negative level of each point in the test requirement through an analog quantity conversion circuit expanded by the DSP, as shown in figure 4, the AD conversion circuit is realized through AD7606, the AD7606 is a 16-bit synchronous sampling AD chip, the sampling rate is up to 200K, 6 paths of voltage sampling are provided, and the AD conversion circuit and the DSP end adopt ADuM7442CRQZ for digital isolation; the AD conditioning circuit is used for conditioning the positive level and the negative level of each pin in the test requirement, and sending the positive level and the negative level to the AD sampling circuit after signal conditioning, as shown in FIG. 5; the signal switching circuit switches test channels of the tested signals and comprises an analog quantity switching circuit and a digital quantity switching circuit, wherein the analog quantity switching circuit is used for switching a positive level and a negative level of a communication conversion board and switching a high level and a low level and sending the switched signals to an AD conditioning circuit, and the requirement of multi-channel signal sampling is met as shown in FIG. 6; the digital quantity switching circuit is used for switching 2V voltage and-2V voltage, and inputting each test pin after switching to meet the requirements of multiple paths of test signals, as shown in fig. 7.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The utility model provides a printed circuit board intelligence automatic test system which characterized in that: the method comprises the following steps: the CPU core board is connected with the communication conversion board testing unit, the signal detection board testing unit and the control circuit board testing unit, and the communication conversion board testing unit, the signal detection board testing unit and the control circuit board testing unit are connected with the communication conversion board to be tested, the signal detection board and the control circuit board through the PDS interface board.
2. The intelligent automatic printed circuit board testing system of claim 1, wherein: the CPU core board adopts an LLDSP-28335-A3 core board.
3. The intelligent automatic printed circuit board testing system of claim 1, wherein: the communication conversion board test unit, the signal detection board test unit and the control circuit board test unit respectively comprise a board card power supply input pin internal resistance measurement and power supply circuit to be tested, an AD conversion circuit, an AD conditioning circuit, a signal switching circuit and a power supply conversion circuit, wherein the board card power supply input pin internal resistance measurement and power supply circuit to be tested is used for measuring the internal resistance between the power supply input pins of the board card to be tested before being electrified; the AD conversion circuit is used for acquiring the positive level and the negative level of each point in the test requirement; the AD conditioning circuit is used for conditioning the positive level and the negative level of each pin in the test requirement, conditioning the positive level and the negative level by signals and sending the positive level and the negative level to the AD sampling circuit, and the signal switching circuit is used for switching test channels of each tested signal.
4. The intelligent automatic printed circuit board testing system of claim 3, wherein: the AD conversion circuit adopts an AD7606 chip.
5. The intelligent automatic printed circuit board testing system of claim 3, wherein: the signal switching circuit comprises an analog quantity switching circuit and a digital quantity switching circuit, wherein the analog quantity switching circuit is used for switching the positive level and the negative level of the board card to be tested, and switching the positive level and the negative level and the high level and the low level of the board card to be tested and then sending the switched positive level and the switched negative level to the AD conditioning circuit; the digital quantity switching circuit is used for switching 2V voltage and-2V voltage and inputting the switched voltage to each test pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120020101.0U CN214539891U (en) | 2021-01-06 | 2021-01-06 | Intelligent automatic test system for printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120020101.0U CN214539891U (en) | 2021-01-06 | 2021-01-06 | Intelligent automatic test system for printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214539891U true CN214539891U (en) | 2021-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120020101.0U Active CN214539891U (en) | 2021-01-06 | 2021-01-06 | Intelligent automatic test system for printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214539891U (en) |
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2021
- 2021-01-06 CN CN202120020101.0U patent/CN214539891U/en active Active
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