Programmable PCBA board with online test points

Abstract

This utility model discloses a programmable PCBA board with online test points, including a PCBA board, on which test points are provided, each corresponding to a power line, signal line, GPIO of FPGA / MCU, reset signal line, and clock line. Test blocks are provided on the sides of the test points, and resistors are connected in series between the test blocks and the test points. The test blocks have inwardly recessed grooves on their tops, and elastic blocks within the grooves contact the pins on the test probe bed. A dust cover is also installed on the top of the test blocks, and the top of the dust cover has through holes corresponding to the grooves for the pins to pass through. The dust cover also has a cover for automatically closing the through holes. The PCBA board has a programmable interface connected to the JTAG and SWD pins of a control chip. This utility model facilitates future testing and maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field of PCBA boards, specifically a programmable PCBA board with online test points. Background Technology

[0002] A PCB, or printed circuit board, is an important electronic component. It serves as the support for electronic components and provides electrical connections for them.

[0003] In mass production of circuit boards, it's impossible to mount every single board onto a complete machine for testing. Therefore, in actual production, the process department designs and manufactures a test fixture to simulate the entire machine. The design principle of the test fixture is to use a bed of test probes to simulate the connection between the entire machine and the circuit board. The power, ground, input, and output lines from the circuit board are connected to the test probes on the bed of probes. Switches control the input signals and power supply on the fixture, and indicator lights or motors simulate the corresponding output loads on the entire machine. However, existing circuit boards do not have pre-reserved test points. When using probes to contact the test leads, reflections occur, leading to inaccurate testing. Furthermore, the test probes may rub against the test points, potentially causing breakage of the test line. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a programmable PCBA board with online test points.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a programmable PCBA board with online test points, comprising a PCBA board, wherein the PCBA board has test points that are connected one-to-one with power lines, signal lines, GPIO of FPGA / MCU, reset signal lines and clock lines, and test blocks are provided on the sides of the test points, and a resistor is connected in series between the test blocks and the test points. The test blocks have an inwardly recessed groove on the top, and an elastic block in the groove contacts the pins on the test probe bed. A dust cover is also installed on the top of the test block, and the top of the dust cover has a through hole corresponding to the groove for the pins to pass through. The dust cover also has a cover for automatically closing the through hole. The PCBA board has a programmable interface that connects to the JTAG and SWD pins of the control chip.

[0007] As a preferred embodiment of the present invention, the elastic block includes a conductive block disposed in the groove and moving along the groove, and a spring is provided between the conductive block and the bottom side of the groove.

[0008] As a preferred embodiment of this invention, the dust cover is threadedly connected to the test block.

[0009] As a preferred technical solution of this utility model, the cover includes a flip cover, one side of which is hinged to a dust cover via a hinge shaft, and the end of the flip cover is provided with a counterweight plate that is perpendicular to the flip cover. The dust cover is provided with a storage cavity for storing the flip cover, and the storage cavity is provided with a limiting step for limiting the flip cover to flip upward.

[0010] As a preferred embodiment of this utility model, the counterweight plate is provided with a counterweight block.

[0011] As a preferred embodiment of this invention, the resistance value of the resistor is 20 ohms to 100 ohms.

[0012] The beneficial effects of this utility model are:

[0013] 1. This type of programmable PCBA board with online test points has test points on the PCBA board that correspond one-to-one with power lines, signal lines, GPIO of FPGA / MCU, reset signal lines, and clock lines. Test blocks are provided on the sides of the test points. By setting the test blocks and adding elastic blocks on the test blocks that contact the pins on the test probe bed, rigid collisions with the pins are avoided, preventing damage. A resistor is connected in series between the test block and the test point, which acts as an anti-reflection device, thus making the test results more accurate. A dust cover is installed on the top of the test block, and the dust cover has a cover door for automatic closure of the through-holes, thus preventing dust accumulation on the surface of the test block during future maintenance. In addition, this invention also provides a programmable interface that connects to the JTAG and SWD pins of the control chip, facilitating program burning.

[0014] 2. This type of programmable PCBA board with online test points has a cover that automatically closes by setting specific through holes. Under normal circumstances, the through holes are blocked by the limiting action of the flip cover under the action of the configuration board, thus achieving the function of automatic closure of the through holes. When using pins for testing, the flip cover is automatically opened by pressing the pins down. After the test is completed, the flip cover is flipped up to automatically close the through holes, thus achieving the function of dust prevention. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1This is a schematic diagram of the structure of a programmable PCBA board with online test points according to this utility model;

[0017] Figure 2 This is a schematic diagram of the resistor installation on a programmable PCBA board with online test points according to this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of a test block for a programmable PCBA board with online test points according to this utility model;

[0019] Figure 4 This is a diagram showing the open state of the cover of a programmable PCBA board with online test points according to this utility model.

[0020] In the diagram: 1. PCBA board; 2. Test point; 3. Test block; 4. Resistor; 5. Groove; 6. Elastic block; 7. Dust cover; 8. Through hole; 9. Cover; 10. Programmable interface; 11. Conductive block; 12. Spring; 13. Hinge shaft; 14. Counterweight plate; 15. Storage cavity; 16. Limiting step; 17. Counterweight block; 18. Flip cover. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example: Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this utility model discloses a programmable PCBA board with online test points, including a PCBA board 1. The PCBA board 1 has test points 2 connected to power lines, signal lines, GPIO of FPGA / MCU, reset signal lines, and clock lines, one-to-one. Test blocks 3 are provided on the sides of the test points 2, and a resistor 4 is connected in series between the test blocks 3 and the test points 2. The test blocks 3 have an inwardly recessed groove 5 on their top, and an elastic block 6 within the groove 5 contacts the pins on the test probe bed. A dust cover 7 is also installed on the top of the test blocks 3, and the top of the dust cover 7 has a through hole 8 corresponding to the groove 5 for the pins to pass through. The dust cover 7 also has a cover 9 for automatically closing the through hole 8. The PCBA board 1 has a programmable interface 10 connected to the JTAG and SWD pins of a control chip. When the impedance of the signal source does not match the characteristic impedance of the transmission line, signal reflection will occur, leading to waveform distortion or data errors. Impedance matching using resistors prevents signal reflection. The PCBA board 1 has test points 2 that correspond one-to-one with the power lines, signal lines, GPIO of the FPGA / MCU, reset signal lines, and clock lines. Test blocks 3 are provided on the sides of the test points 2. By setting the test blocks 3 and providing elastic blocks 6 on the test blocks 3 to contact the pins on the test probe bed, rigid collisions with the pins that could cause damage are avoided. A resistor 4 is connected in series between the test blocks 3 and the test points 2. The resistor 4 serves as an anti-reflection device, making the test results more accurate. A dust cover 7 is installed on the top of the test blocks 3. The dust cover 7 also has a cover door 9 for automatically closing the through holes 8, which can prevent dust from accumulating on the surface of the test blocks 3 during future maintenance. In addition, this invention also provides a programmable interface 10 that connects to the JTAG and SWD pins of the control chip, which facilitates program burning.

[0023] The elastic block 6 includes a conductive block 11 disposed in the groove 5 and moving along the groove 5. A spring 12 is provided between the conductive block 11 and the bottom side of the groove 5, so as to avoid rigid collision with the pin and cause damage. The spring plays a buffering role.

[0024] The dust cover 7 is threadedly connected to the test block 3, which facilitates disassembly.

[0025] The cover 9 includes a flip cover 18, one side of which is hinged to a dust cover 7 via a hinge shaft 13. A counterweight plate 14, perpendicular to the flip cover 18, is located at the end of the flip cover 18. The dust cover 7 has a storage cavity 15 for storing the flip cover 18, and a limiting step 16 within the storage cavity 15 to limit the upward flipping of the flip cover 18. The cover 9 automatically closes via a specific through-hole 8. Under normal conditions, the through-hole 8 is blocked by the limiting action of the flip cover 18, thus automatically closing the through-hole 8. When using a probe for testing, pressing the flip cover 18 downwards with the probe automatically opens the flip cover 18. After testing, the flip cover 18 flips upwards to automatically close the through-hole 8, thus providing dust protection.

[0026] The counterweight plate 14 is equipped with a counterweight block 17 to facilitate automatic closing of the flip cover 18. The resistor 4 has a resistance of 20 ohms to 100 ohms.

[0027] During operation, this type of programmable PCBA board with online test points has test points 2 on the PCBA board 1, which are connected one-to-one with power lines, signal lines, GPIO of FPGA / MCU, reset signal lines, and clock lines. Test blocks 3 are provided on the sides of test points 2. By setting test blocks 3 and providing elastic blocks 6 on test blocks 3 to contact the pins on the test probe bed, rigid collisions with the pins that could cause damage are avoided. A resistor 4 is connected in series between test blocks 3 and test points 2, which acts as an anti-reflection device, thus making the test results more accurate. A dust cover 7 is installed on the top of test blocks 3, and the dust cover 7 is provided with a cover door 9 for automatically closing the through holes 8, which can prevent dust from accumulating on the surface of test blocks 3 during future maintenance. In addition, this utility model also provides a programmable interface 10 that connects to the JTAG and SWD pins of the control chip, which facilitates program burning.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A programmable PCBA board with online test points, characterized by, The system includes a PCBA board (1), and the PCBA board (1) is provided with test points (2) that correspond one-to-one with power lines, signal lines, GPIO of FPGA / MCU, reset signal lines and clock lines. The test points (2) are provided with test blocks (3) on their sides. A resistor (4) is connected in series between the test blocks (3) and the test points (2). The test blocks (3) are provided with an inwardly recessed groove (5) on their top. The groove (5) contains an elastic block (6) that contacts the pins on the test needle bed. The top of the test blocks (3) is also provided with a dust cover (7). The top of the dust cover (7) is provided with a through hole (8) corresponding to the groove (5) and allowing the pins to pass through. The dust cover (7) is also provided with a cover door (9) for automatically closing the through hole (8). The PCBA board (1) is provided with a programmable interface (10) that is connected to the JTAG and SWD pins of the control chip.

2. The programmable PCBA board with online test points according to claim 1, characterized in that, The elastic block (6) includes a conductive block (11) disposed in the groove (5) and moving along the groove (5), and a spring (12) is provided between the conductive block (11) and the bottom side of the groove (5).

3. The programmable PCBA board with online test points of claim 1, wherein, The dust cover (7) is threadedly connected to the test block (3).

4. The programmable PCBA board with online test points of claim 2, wherein, The cover (9) includes a flip cover (18), one side of which is hinged to the dust cover (7) via a hinge shaft (13), and the end of the flip cover (18) is provided with a counterweight plate (14) arranged perpendicular to the flip cover (18). The dust cover (7) is provided with a storage cavity (15) for storing the flip cover (18), and the storage cavity (15) is provided with a limiting step (16) for limiting the flip cover (18) to flip upward.

5. The programmable PCBA board with online test points of claim 4, wherein, The counterweight plate (14) is provided with a counterweight block (17).

6. The programmable PCBA board with online test points of claim 1, wherein, The resistance of the resistor (4) is 20 ohms to 100 ohms.

Images