Device and method for detecting stress of USB (Universal Serial Bus) plug interface

Abstract

The invention relates to the technical field of USB detection, and discloses a USB interface stress detection device, which comprises a workbench, a to-be-detected computer and a to-be-detected USB plug used for being inserted at a USB interface of the to-be-detected computer, a placement table is arranged on the workbench, the placement table is used for fixing the to-be-detected computer, the workbench is also provided with a control slide rail, and the control slide rail is used for controlling the to-be-detected computer to be inserted into the to-be-detected computer. A walking table capable of moving is arranged above the control sliding rail; a rotating frame is rotationally arranged on the right side of the walking table, an X-axis sliding rail and a Y-axis sliding rail are arranged on the surface of the rotating frame, and an X-axis pressing arm capable of moving in the X-axis direction is arranged on the X-axis sliding rail. According to the invention, the to-be-measured USB plug is extruded through the X-axis pressure sensor and the Y-axis pressure sensor, the extruded force and angle of the to-be-measured USB plug can be measured, and the connection impedance of the to-be-measured USB plug under the force and angle can be measured, so that the connection impedance of the USB interface can be measured in all directions.

Description

Technical Field

[0001] The present invention relates to the field of USB detection technology, and in particular to a force detection device and method for a USB plug interface. Background Art

[0002] USB interface force detection equipment is used to test the force and on-resistance changes of USB interfaces (including USB Type-A, Type-C, etc.) during the plugging and unplugging process to ensure the durability, reliability and compliance with relevant quality standards of the interface. Such equipment is usually used in the R&D, production and quality control of electronic products.

[0003] The existing patent discloses an ARM-based keyboard resistance detection system and method (publication number CN101833040A) for detecting the contact resistance of a finished computer keyboard. The keyboard to be tested is connected to an array switch, and the array switch is respectively connected to a constant current source, a voltage comparator, an amplifier and an ARM chip. In the technology disclosed in the patent, due to the different angles and insertion forces between the USB plug and the female port, different connection resistances will be caused. If data compensation optimization is not performed in advance, data errors are often prone to occur during long-term data transmission. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a force detection device and method for a USB plug interface, which solves the problems in the above-mentioned background technology.

[0005] To solve the above technical problems, according to one aspect of the present invention, more specifically, a force detection device for a USB plug interface includes a workbench, a computer to be tested, and a USB plug to be tested that is inserted into the USB interface of the computer to be tested, wherein a placing table is provided on the workbench, the placing table is used to fix the computer to be tested, and a control slide rail is provided on the workbench, and a movable walking table is provided above the control slide rail;

[0006] A rotating frame is rotatably arranged on the right side of the walking platform, and an X-axis slide rail and a Y-axis slide rail are respectively arranged on the surface of the rotating frame, an X-axis pressure arm capable of moving along the X-axis direction is arranged on the X-axis slide rail, and a Y-axis pressure arm capable of moving along the Y-axis direction is arranged on the Y-axis slide rail;

[0007] An X-axis pressure sensor is disposed at the end of the X-axis pressure arm, and a Y-axis sensor is disposed at the end of the Y-axis pressure arm.

[0008] Furthermore, a servo motor is provided inside the walking platform, and an output shaft of the servo motor is fixedly connected to the rotating frame.

[0009] Furthermore, the control slide rail, the X-axis slide rail and the Y-axis slide rail are all provided with screw rods, and the control slide rail and the walking platform, the X-axis slide rail and the X-axis pressure arm, and the Y-axis slide rail and the Y-axis pressure arm are all connected through the screw rods.

[0010] A detection method for a USB plug interface force detection device, comprising the following steps:

[0011] S1. Open the workbench for initialization;

[0012] S2, by adjusting the force applied by the X-axis pressure sensor and the Y-axis pressure sensor to the USB plug to be tested, the USB plug to be tested is connected to the computer interface to be tested at different angles and tested;

[0013] S3, measure the current value and determine whether the current value is greater than 100mA. If it is greater than 100mA, close the measurement channel and output a fault prompt;

[0014] S4, continue to measure the current value and determine whether the current value is less than 1uA, if it is less than 1uA, continue to determine whether the current source is greater than 100mA;

[0015] S5. When the current value is greater than 1uA, determine whether the voltage sampling analog value is greater than 2.5V or the digital value is greater than 65535. If yes, reduce the magnification and repeat step S3;

[0016] S6, calculating the impedance value between the USB plug to be tested and the computer interface to be tested at the angle and force, storing the value and feeding it back to the display, and repeating step S2.

[0017] Furthermore, in step S1, the workbench initialization includes adjusting the resistance of the current limiter to a maximum of 600KΩ so that the current of the current source is ≤10uA; maximizing the amplifier, and adjusting the amplification factor of the amplifier to 500 times.

[0018] Furthermore, in step S4, it is necessary to determine whether the current source is greater than 100 mA;

[0019] When the current source current is greater than 100mA, the impedance output is 0 due to exceeding the limit, and the voltage across the two ends is measured to be 0.06V;

[0020] When the current source current is less than 100 mA, the current limiting multiple of the current limiter is reduced by 10 times, and step S3 is repeated.

[0021] Furthermore, in step S5, according to the response time after the USB interface is plugged in, the sampling frequency of the voltage data sampling, and the minimum voltage change value that the sampling system can distinguish, it is determined whether the voltage sampling analog value is greater than 65535, and:

[0022]

[0023] In the formula, m represents the analog value of voltage sampling, s represents the response time after the USB interface is plugged in, f represents the sampling frequency of voltage data sampling, and u represents the minimum voltage change value that the sampling system can distinguish.

[0024] Furthermore, in step S6, the impedance value between the USB plug to be tested and the computer interface to be tested at the angle and force is calculated as follows:

[0025]

[0026] Wherein, R represents the measured impedance value, u0 represents the sampling value of the voltage, i represents the measured current value, and a represents the current amplification factor.

[0027] Beneficial effects:

[0028] 1. The present invention squeezes the USB plug to be tested through an X-axis pressure sensor and a Y-axis pressure sensor, and can measure the squeezing force and angle of the USB plug to be tested, and also measures the connection impedance of the USB plug to be tested under the force and angle, so that the connection impedance of the USB interface can be measured in all directions.

[0029] 2. The present invention performs cyclic measurement of the impedance of the USB interface by automatically determining whether the measured current and voltage exceed a threshold value. This measurement method can greatly reduce the repeated adjustment steps for different devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention from a left perspective;

[0031] Figure 2 It is a structural schematic diagram of the present invention from a right perspective;

[0032] Figure 3 For the present invention Figure 2 A magnified image of area A;

[0033] Figure 4 Schematic diagram of the driving structure of the pressure sensor in the present invention;

[0034] Figure 5 The figure is a flow chart of force detection of the USB plug interface in the present invention.

[0035] In the figure: 1. workbench; 2. placement table; 3. computer to be tested; 4. display; 5. control slide rail; 6. walking table; 7. rotating frame; 8. Y-axis slide rail; 9. X-axis slide rail; 10. Y-axis pressure arm; 11. X-axis pressure arm; 12. Y-axis pressure sensor; 13. USB plug to be tested; 14. X-axis pressure sensor. DETAILED DESCRIPTION

[0036] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Example 1

[0038] like Figure 5 As shown, a detection method for a USB plug interface force detection device comprises the following steps:

[0039] Step 1: Turn on the workbench 1 for initialization. The workbench 1 initialization includes adjusting the current limiter resistance to a maximum of 600KΩ so that the current of the current source is ≤10uA; maximizing the amplifier, and adjusting the amplifier amplification factor to 500 times.

[0040] Step 2: By adjusting the force applied by the X-axis pressure sensor 14 and the Y-axis pressure sensor 12 to the USB plug 13 to be tested, the USB plug 13 to be tested is connected to the interface of the computer 3 to be tested at different angles and tested.

[0041] Step 3: Measure the current value and determine whether it is greater than 100mA. If it is greater than 100mA, close the measurement channel and output a fault prompt.

[0042] Step 4: Continue to measure the current value and determine whether the current value is less than 1uA. If it is less than 1uA, continue to determine whether the current source is greater than 100mA. In this step, you need to determine whether the current source is greater than 100mA:

[0043] 1) When the current source current is greater than 100mA, the impedance output is 0 due to exceeding the limit, and the voltage across the two ends is measured to be 0.06V.

[0044] 2) When the current source current is less than 100mA, the current limiting multiple of the current limiter is reduced by 10 times, and step 3 is repeated.

[0045] Step 5: When the current value is greater than 1uA, determine whether the voltage sampling analog value is greater than 2.5V or the digital value is greater than 65535. If so, reduce the amplification factor and repeat step 3.

[0046] Step 6: Calculate the impedance value between the USB plug 13 to be tested and the interface of the computer 3 to be tested at the angle and force, store the value and feed it back to the display 4, and repeat step 2.

[0047] According to the response time after the USB interface is plugged in, the sampling frequency of the voltage data sampling, and the minimum voltage change value that the sampling system can distinguish, it is determined whether the voltage sampling analog value is greater than 65535.

[0048]

[0049] In the formula, m represents the analog value of voltage sampling, s represents the response time after the USB interface is plugged in, f represents the sampling frequency of voltage data sampling, and u represents the minimum voltage change value that the sampling system can distinguish.

[0050] The impedance value between the USB plug 13 to be tested and the interface of the computer 3 to be tested under this angle and force is calculated as follows:

[0051]

[0052] Wherein, R represents the measured impedance value, u0 represents the sampling value of the voltage, i represents the measured current value, and a represents the current amplification factor.

[0053] Example 2

[0054] like Figure 1 -4, according to one aspect of the present invention, there is provided a force detection device for a USB plug interface, comprising a workbench 1, a computer to be tested 3, and a USB plug to be tested 13 for being inserted into the USB interface of the computer to be tested 3, a placing table 2 is provided on the workbench 1, the placing table 2 is used to fix the computer to be tested 3, a control slide rail 5 is also provided on the workbench 1, and a movable walking platform 6 is provided above the control slide rail 5; a rotating frame 7 is rotatably provided on the right side of the walking platform 6, and an X-axis slide rail 9 and a Y-axis slide rail 8 are respectively provided on the surface of the rotating frame 7, an X-axis pressure arm 11 that can move along the X-axis direction is provided on the X-axis slide rail 9, and a Y-axis pressure arm 10 that can move along the Y-axis direction is provided on the Y-axis slide rail 8. The USB plug to be tested 13 is squeezed by the X-axis pressure sensor 14 and the Y-axis pressure sensor 12, and the squeezing force and angle of the USB plug to be tested 13 can be measured, and the connection impedance of the USB plug to be tested 13 under the force and angle is also measured.

[0055] The end of the X-axis pressure arm 11 is provided with an X-axis pressure sensor 14, and the end of the Y-axis pressure arm 10 is provided with a Y-axis sensor 12. Figure 4 As shown in the figure, the X-axis pressure arm 11 is used to change the squeezing force of the USB plug 13 to be tested by the X-axis pressure sensor 14, the Y-axis pressure arm 10 is used to change the squeezing force of the USB plug 13 to be tested by the Y-axis pressure sensor 12, and the servo motor inside the walking platform 6 is used to change the squeezing direction of the USB plug 13 to be tested by the Y-axis pressure sensor 12.

[0056] Example 3

[0057] A servo motor is provided inside the walking platform 6, and the output shaft of the servo motor is fixedly connected to the rotating frame 7. Screws are provided inside the control rail 5, the X-axis rail 9, and the Y-axis rail 8, and the control rail 5 and the walking platform 6, the X-axis rail 9 and the X-axis pressure arm 11, and the Y-axis rail 8 and the Y-axis pressure arm 10 are all connected through screws. The squeezing force of the X-axis pressure sensor 14 and the Y-axis pressure sensor 12 can be accurately controlled through the screw connection.

[0058] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A device for testing the force of a USB interface, comprising a workbench (1), a computer to be tested (3), and a USB plug to be tested (13) for being inserted into the USB interface of the computer to be tested (3), characterized in that: The workbench (1) is provided with a placement table (2), the placement table (2) is used to fix the computer to be tested (3), the workbench (1) is also provided with a control slide rail (5), and a movable walking table (6) is provided above the control slide rail (5); A rotating frame (7) is rotatably arranged on the right side of the walking platform (6); an X-axis slide rail (9) and a Y-axis slide rail (8) are respectively arranged on the surface of the rotating frame (7); an X-axis pressure arm (11) capable of moving along the X-axis direction is arranged on the X-axis slide rail (9); and a Y-axis pressure arm (10) capable of moving along the Y-axis direction is arranged on the Y-axis slide rail (8); An X-axis pressure sensor (14) is provided at the end of the X-axis pressure arm (11), and a Y-axis sensor (12) is provided at the end of the Y-axis pressure arm (10).

2. The force detection device for a USB interface according to claim 1, characterized in that: A servo motor is provided inside the walking platform (6), and an output shaft of the servo motor is fixedly connected to a rotating frame (7).

3. The force detection device for a USB interface according to claim 1, characterized in that: The control slide rail (5), the X-axis slide rail (9) and the Y-axis slide rail (8) are all provided with screw rods inside, and the control slide rail (5) and the walking platform (6), the X-axis slide rail (9) and the X-axis pressure arm (11), and the Y-axis slide rail (8) and the Y-axis pressure arm (10) are all connected through the screw rods.

4. A detection method for a USB plug port force detection device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Open the workbench (1) for initialization; S2, by adjusting the force applied by the X-axis pressure sensor (14) and the Y-axis pressure sensor (12) to the USB plug (13) to be tested, the USB plug (13) to be tested and the interface of the computer (3) to be tested are connected at different angles and tested; S3, measure the current value and determine whether the current value is greater than 100mA. If it is greater than 100mA, close the measurement channel and output a fault prompt; S4, continue to measure the current value and determine whether the current value is less than 1uA, if it is less than 1uA, continue to determine whether the current source is greater than 100mA; S5. When the current value is greater than 1uA, determine whether the voltage sampling analog value is greater than 2.5V or the digital value is greater than 65535. If yes, reduce the magnification and repeat step S3; S6, calculating the impedance value between the USB plug (13) to be tested and the interface of the computer (3) to be tested at the angle and force, storing the value and feeding it back to the display (4), and repeating step S2.

5. The detection method for a USB plug interface force detection device according to claim 4, characterized in that: In the step S1, the workbench (1) is initialized by adjusting the resistance of the current limiter to a maximum of 600KΩ so that the current of the current source is ≤10uA; maximizing the amplifier and adjusting the gain of the amplifier to 500 times.

6. The detection method for a USB interface force detection device according to claim 4, characterized in that: In step S4, it is necessary to determine whether the current source is greater than 100mA; When the current source current is greater than 100mA, the impedance output is 0 due to exceeding the limit, and the voltage across the two ends is measured to be 0.06V; When the current of the current source is less than 100 mA, the current limiting multiple of the current limiter is reduced by 10 times, and step S3 is repeated.

7. The detection method for a USB plug interface force detection device according to claim 4, characterized in that: In step S5, according to the response time after the USB interface is plugged in, the sampling frequency of the voltage data sampling, and the minimum voltage change value that the sampling system can distinguish, it is determined whether the voltage sampling analog value is greater than 65535, and: In the formula, m represents the analog value of voltage sampling, s represents the response time after the USB interface is plugged in, f represents the sampling frequency of voltage data sampling, and u represents the minimum voltage change value that the sampling system can distinguish.

8. The detection method for a USB plug interface force detection device according to claim 4, characterized in that: In step S6, the impedance value between the USB plug (13) to be tested and the interface of the computer (3) to be tested at the angle and force is calculated as follows: Wherein, R represents the measured impedance value, u0 represents the sampling value of the voltage, i represents the measured current value, and a represents the current amplification factor.

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