A contact resistance detection device and control method thereof

Abstract

The present invention provides a contact resistance detection device, including: a test fixture, the test fixture includes a turntable and a radial force sensor, the radial force sensor is installed on the turntable; a control system, the control system includes a controller, a driver and a resistance measurement module, the controller is connected to the radial force sensor, the driver and the resistance measurement module, the controller obtains the radial force value monitored by the radial force sensor, the controller controls the driver to drive the turntable and the radial force sensor to rotate, and changes the angle of application of the radial force, the resistance measurement module is connected to the connector cavity and the test needle through a wire and measures the contact resistance value and sends it to the controller. The present invention also provides a control method for the automatic mode and the manual mode of the device. The present invention can realize a specified angle or a 360-degree full-angle test and automatically record monitoring data, with high work efficiency and accuracy, and has good use and promotion value.

Description

Technical Field

[0001] The invention relates to the field of contact resistance detection devices, and in particular to a contact resistance detection device and a control method thereof. Background Art

[0002] At present, the existing medical industry standard "Dimensions and Test Requirements for Four-Pole Connector Systems for Active Implantable Medical Devices Implantable Cardiac Rhythm Regulation Devices" (YY / T 0972-2016) stipulates the requirements for contact resistance stability testing. This standard requires that the test needle in the contact resistance test device can complete a 360° rotation test under applied load. In the field of implantable medical devices, contact resistance test devices generally use a simple method of applying load, such as simulating the required load by hanging weights on the test needle. Its disadvantages are: 1. The load direction is single and can only simulate the load in one direction; 2. When changing the load direction, human intervention is required for manual rotation, which is labor-intensive and has poor accuracy. It is difficult to perform a 360° full-angle test and cannot meet the 360° stability test requirements of the industry standard. Therefore, a device and a control method thereof that can effectively provide a specified angle or 360-degree full-angle automatic detection of contact resistance can be provided, which can improve work efficiency and test accuracy. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a contact resistance detection device and a control method thereof.

[0004] In order to achieve the above purpose and other purposes, the present invention is implemented by including the following technical solutions: The present invention provides a contact resistance detection device, including: a test fixture, the test fixture includes a base, a fixture, a bearing seat, a turntable and a radial force sensor, the fixture is fixed on the base, the bearing seat is fixed on the base, the turntable is rotatably set on the bearing seat and is located between the fixture and the bearing seat, and the radial force sensor is installed on the turntable; a control system, the control system includes a controller, a driver and a resistance measurement module, the controller is connected to the radial force sensor, the driver and the resistance measurement module, the controller obtains the radial force value monitored by the radial force sensor, the controller controls the driver to drive the turntable and the radial force sensor to rotate, and changes the application angle of the radial force, the resistance measurement module is connected to the connector cavity and the test needle through a wire, measures the contact resistance value of the connector cavity and the test needle and sends it to the controller.

[0005] In one embodiment, the control system further includes an angle sensor, which is connected to the turntable and the controller and is used to monitor the rotation angle value of the turntable and send it to the controller.

[0006] In one embodiment, the controller generates a measurement record of radial force values, angle values, and resistance values.

[0007] In one embodiment, the control system further comprises a display which displays measurement records and alarms generated by the controller.

[0008] In one embodiment, the controller is a CPU, an MCU, an FPGA, or an application specific integrated circuit.

[0009] The present invention also provides an automatic mode control method for a contact resistance detection device, which controls the detection device, including the steps of: starting the controller; setting the driver to drive the turntable to rotate a specific angle or a full angle of 360 degrees; monitoring the angle: controlling the angle sensor to monitor the rotation angle of the turntable and feedback the monitoring data, and receiving the rotation data fed back by the driver; applying and monitoring radial force: controlling the radial force sensor to apply radial force, and obtaining the radial force data monitored by the radial force sensor; monitoring resistance: controlling the resistance measurement module to monitor the contact resistance value of the connector inner cavity and the test needle and feedback the monitoring data; generating a measurement record of the association between the angle value, the resistance value and the radial force value and displaying the record on the display; when it is monitored that at least one measurement value in the measurement record exceeds the set parameter value, an alarm is generated and displayed on the display, and if none of them exceeds, it is determined whether the turntable has completed the rotation of the specified angle; when the turntable completes the rotation of the specified angle, the program ends, otherwise the above steps are repeated.

[0010] In one embodiment, when the driver rotates a unit angle, the driver drives the turntable to synchronously rotate a unit angle.

[0011] In one embodiment, the steps of monitoring the angle, applying and monitoring the radial force, and monitoring the resistance may be performed sequentially or simultaneously.

[0012] The present invention also provides a manual mode control method for a contact resistance detection device, which controls the detection device, including the steps of: starting the controller; manually rotating the turntable, the turntable driving the driver to passively rotate; controlling the angle sensor to monitor the rotation angle of the turntable and feedback monitoring data, while receiving the rotation data fed back by the driver, controlling the radial force sensor to apply radial force, obtaining the radial force data monitored by the radial force sensor, controlling the resistance measurement module to monitor the contact resistance value of the connector inner cavity and the test needle and feedback monitoring data; generating a measurement record of the association between the angle value, the resistance value and the radial force value and displaying the record on the display; when at least one measurement value in the monitored measurement record exceeds the set parameter value, an alarm is generated and displayed on the display, and if none of them exceeds, repeating the above steps; after the alarm is generated and displayed on the display, repeating the above steps until the turntable is manually rotated to complete the specified angle or a full 360-degree rotation.

[0013] In one embodiment, the program logic of the monitoring angle in the steps may be configured to continue the current step when the monitoring angle does not change.

[0014] The present invention is ingenious in conception and easy to use. It can complete the contact resistance value after different radial forces are applied at a specific angle or 360 degrees through automatic or manual rotation, and can fully automate the monitoring data recording work, and issue an alarm when the contact resistance parameters are unqualified, or point it out in the test report. In addition, it supports contact resistance test control in manual mode and automatic mode at the same time. When problems occur in the test in automatic mode, the problem can be verified by the test in manual mode, which is convenient for defect analysis of the tested product. Therefore, the present invention can provide effective tests at specified angles or 360 degrees for contact resistance tests, and has high work efficiency and high accuracy, and has good use and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a three-dimensional schematic diagram of the test fixture of the present invention.

[0016] Figure 2 Shown is a structural schematic diagram of a contact resistance detection device of the present invention.

[0017] Figure 3 Shown is a schematic diagram of the structure of the control system in the present invention.

[0018] Figure 4a and Figure 4b Shown is a schematic diagram of a measurement record table generated by the controller in the present invention.

[0019] Figure 5 Shown is a flow chart of the control method of the controller in the automatic mode of the present invention.

[0020] Figure 6 Shown is a flow chart of the control method of the controller in the manual mode of the present invention.

[0021] Figure 7 A schematic diagram showing an alarm generated by the controller in the present invention. DETAILED DESCRIPTION

[0022] See also Figures 1 to 7 The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0023] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for the technical personnel in this field to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportion relationship or adjustment of the size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0024] like Figure 1 As shown, the detection device of the present invention includes a test fixture 20, and the test fixture 20 includes a base 21, a fixture 22, a bearing seat 23, a turntable 24, and a radial force sensor 25. The fixture 22 is fixed on the base 21, the bearing seat 23 is fixed on the base 21, the turntable 24 is located between the fixture 22 and the bearing seat 23, and is connected to the bearing seat 23. The radial force sensor 25 is installed on the turntable 24, and the radial force sensor 25 can be a tensile gauge. Please refer to Figure 2 The connector 10 to be tested is pre-fixed in the fixture 22. The test fixture 20 also includes a test needle 26. One end of the test needle 26 is inserted into the inner cavity of the connector 10, and the other end of the test needle 26 is connected to the radial force sensor 25 (the radial force sensor 25 is a tension gauge, and the hook of the tension gauge is hung on the test needle 26). The radial force sensor 25 sets a specific tension to generate a radial force on the connector 10. When the turntable 24 rotates, it drives the radial force sensor 25 to rotate, changing the angle of application of the radial force.

[0025] like Figure 2As shown, the detection device also includes a control system 30, which is used to control the rotation of the turntable 24, perform contact resistance test, and record test data. The control system 30 includes a controller 31, a driver 32 and a resistance measurement module 33, and the controller 31 is connected to the driver 32 and the resistance measurement module 33 respectively. The driver 32 is fixed in the bearing seat 23, and the driver 32 is a servo motor or a stepping motor. The controller 31 is used to control the driver 32 to drive the turntable 24 to rotate synchronously at a specific angle, and receive the rotation angle fed back by the driver 32. The resistance measurement module 33 is connected to the inner cavity of the connector 10 and the test needle 26 through a wire, and the terminal connecting the wire to the connector 10 and the test needle 26 is coated with a magnetic material, which is used to measure the contact resistance value of the inner cavity of the connector 10 and the test needle 26 and send it to the controller 31. The controller 31 is also connected to the radial force sensor 25, and the controller 31 obtains the radial force data monitored by the radial force sensor 25 and the resistance value monitored by the resistance measurement module 33, and generates a measurement record of the radial force value associated with the resistance value. The controller 31 can be a CPU, an MCU, an FPGA or a dedicated integrated circuit.

[0026] like Figure 2 As shown, the control system 30 further includes an angle sensor 34, which is connected to the turntable 24 and the controller 31, and is used to monitor the rotation angle of the turntable 24 and send it to the controller 31, and the controller 31 generates a measurement record of the angle value associated with the resistance value or the radial force value. The rotation angle value fed back by the driver 32 is consistent with the rotation angle value monitored by the angle sensor 34.

[0027] like Figure 3 As shown, the controller 31 includes automatic mode and manual mode control programs. The controller 31 controls the rotation of the driver 32 and receives the rotation data fed back by the driver 32. The radial force sensor 25, the resistance measurement module 33 and the angle sensor 34 respectively monitor the radial force value, the resistance value and the angle value and send the data to the controller 31. The controller 31 generates a measurement record of the radial force value, the angle value and the resistance value. The control system 30 also includes a display 35. The measurement record generated by the controller 31 is in the form of a table (such as Figure 4a ) or three tables (such as Figure 4b ) and other forms are displayed through the display 35.

[0028] like Figure 5 As shown, the present invention also provides a control method of the controller 31 in automatic mode, including:

[0029] Step S11: Start: start the controller 31 in automatic mode;

[0030] Step S12: driving the turntable to rotate: setting the driver 32 to drive the turntable 24 to rotate a specific angle or a full angle of 360 degrees;

[0031] Step S13: monitoring angle: controlling the angle sensor 34 to monitor the rotation angle of the turntable 24 and feeding back monitoring data, and receiving the rotation data fed back by the driver 32; applying and monitoring radial force: controlling the radial force sensor 25 to apply radial force, and obtaining radial force data monitored by the radial force sensor 25; monitoring resistance: controlling the resistance measurement module 33 to monitor the contact resistance value between the inner cavity of the connector 10 and the test pin 26 and feeding back monitoring data;

[0032] Step S14: Generate association records: Generate measurement records of associations among angle values, resistance values ​​and radial force values ​​and display the records on the display 35 (as shown in the table in FIG4 );

[0033] Step S15: Exceeding the threshold: When at least one measurement value in the monitored measurement record exceeds the set parameter value (such as the set value of the resistance), execute step S16; if none of them exceeds, execute step S17;

[0034] Step S16: Alarm: Generate an alarm and display it on the display 35, and execute step S17;

[0035] Step S17: Rotate to a specific angle: Determine whether the turntable 24 has completed the specified angle or 360° rotation. If completed, execute step S18, otherwise repeat the above steps S11 to S16;

[0036] Step S18: End: The turntable 24 completes the rotation of the specified angle and the program ends.

[0037] In step 12, the driver 32 rotates a unit angle, and the driver 32 drives the turntable 24 to rotate a unit angle synchronously. There is no fixed order between monitoring the angle, applying and monitoring the radial force, and monitoring the resistance in step S13, and they can be performed sequentially or synchronously.

[0038] like Figure 6 As shown, the present invention also provides a control method of the controller 31 in manual mode, including:

[0039] Step S21: Start: start the manual mode of the controller 31;

[0040] The controller 31 executes the operations of monitoring the rotation angle, recording data, and issuing alarms in steps S22 to S26.

[0041] Step S22: rotating the turntable: manually rotating the turntable 24, the turntable 24 drives the driver 32 to passively rotate;

[0042] Step S23: monitoring angle: controlling the angle sensor 34 to monitor the rotation angle of the turntable 24 and feeding back monitoring data, and receiving the rotation data fed back by the driver 32; applying and monitoring radial force: controlling the radial force sensor 25 to apply radial force, and obtaining the radial force data monitored by the radial force sensor 25; monitoring resistance: controlling the resistance measurement module 33 to monitor the contact resistance value between the inner cavity of the connector 10 and the test pin 26 and feeding back monitoring data, the turntable rotates a set angle, and the resistance measurement module immediately feeds back detection data once, and the set angle is 1° or greater;

[0043] Step S24: Generate association records: Generate measurement records of associations among the angle value, the resistance value and the radial force value and display the records on the display 35 (as shown in the table in FIG4 );

[0044] Step S25: Exceeding the threshold: When at least one measurement value in the monitored measurement record exceeds the set parameter value (such as the set value of the resistance), step S26 is executed. If none of them exceeds, the above steps S22 to S24 are repeated;

[0045] Step S26: Alarm: an alarm is generated and displayed on the display 35, and the above steps S22 to S25 are repeatedly executed.

[0046] After the turntable 24 is manually rotated to complete the designated angle or the 360-degree full angle test, the above steps are completed.

[0047] In a preferred solution, the driver 32 is a servo motor including an encoder, and the driver 32 feeds back an angle signal in a manual mode or an automatic mode through the encoder. In this case, the angle sensor 34 can be omitted in the technical solution of the present invention.

[0048] like Figure 7 As shown, the alarm generated by the controller 31 can be displayed on the display 35 in the form of a dialog box, or can be marked in a corresponding record line.

[0049] In summary, the present invention supports contact resistance tests in both automatic and manual modes. When the controller 31 is set to automatic mode, the controller 31 can fully automatically control the rotation of the driver 32 to drive the turntable 24 to rotate, and control the angle sensor 34, the resistance measurement module 33 and the radial force sensor 25 to automatically monitor the angle value of the rotation of the turntable 24, the radial force value applied by the radial force sensor 25 and the contact resistance value between the connector 10 and the test needle 26, and produce measurement records to complete the contact resistance test at a specified angle or 360 degrees. When the controller 31 is set to manual mode, by manually rotating the turntable 24, the controller 31 can control the angle sensor 34, the resistance measurement module 33 and the radial force sensor 25 to automatically monitor the angle value of the rotation of the turntable 24, the radial force value applied by the radial force sensor 25 and the contact resistance value between the connector 10 and the test needle 26, and produce measurement records to complete the contact resistance test at a specified angle or 360 degrees. In addition, when the monitored contact resistance parameters are unqualified, the controller 31 can sound an alarm; when problems occur in the test in automatic mode, the problem can be verified through the test in manual mode, which facilitates defect analysis of the tested connector 10.

[0050] Therefore, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial utilization value. The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A contact resistance detection device, characterized in that: include: A test fixture, the test fixture comprising a base, a fixture, a bearing seat, a turntable and a radial force sensor, the fixture being fixed on the base, the bearing seat being fixed on the base, the turntable being rotatably disposed on the bearing seat and being located between the fixture and the bearing seat, the radial force sensor being mounted on the turntable, the turntable being rotated by a set angle, the set angle being greater than 1 degree; A control system, wherein the control system includes a controller, a driver and a resistance measurement module, wherein the controller is connected to the radial force sensor, the driver and the resistance measurement module, wherein the controller obtains the radial force value monitored by the radial force sensor, wherein the controller controls the driver to drive the turntable and the radial force sensor to rotate, thereby changing the angle at which the radial force is applied, and wherein the resistance measurement module is connected to the connector cavity and the test needle through a wire, and measures the contact resistance value of the connector cavity and the test needle and sends the result to the controller; The test fixture also includes a test needle, one end of which is inserted into the inner cavity of the connector to be tested, and the other end of the test needle is connected to the radial force sensor. The radial force sensor is set to a specific tensile force, that is, to generate a radial force on the connector. When the turntable rotates, the radial force sensor is driven to rotate, thereby changing the angle of application of the radial force.

2. The contact resistance detection device according to claim 1, characterized in that: The control system further comprises an angle sensor, which is connected to the turntable and the controller and is used for monitoring the rotation angle value of the turntable and sending the value to the controller.

3. The contact resistance detection device according to claim 2, characterized in that: The controller generates a measurement record of radial force values, angle values, and resistance values.

4. The contact resistance detection device according to claim 3, characterized in that: The control system also includes a display that displays measurement logs and alarms generated by the controller.

5. The contact resistance detection device according to claim 1, characterized in that: The controller is a CPU, an MCU, an FPGA, or an integrated circuit.

6. An automatic mode control method for a contact resistance detection device, for controlling the contact resistance detection device according to any one of claims 1 to 5, characterized in that: Includes steps: Starting the controller; Setting the driver to drive the turntable to rotate a set angle; Monitoring angle: controlling the angle sensor to monitor the rotation angle of the turntable and feed back monitoring data, while receiving the rotation data fed back by the driver; Apply and monitor radial force: control the radial force sensor to apply radial force and obtain radial force data monitored by the radial force sensor; monitor resistance: control the resistance measurement module to monitor the contact resistance value between the connector cavity and the test pin and feed back the monitoring data; generating a measurement record of the correlation between the angle value, the resistance value and the radial force value and displaying the record on a display; When it is detected that at least one measurement value in the measurement record exceeds the set parameter value, an alarm is generated and displayed on the display; if none of the values ​​exceed the set parameter value, it is determined whether the turntable has completed the rotation of the set angle; When the turntable completes the rotation of the set angle, the program ends, otherwise the above steps are repeated.

7. The automatic mode control method of the contact resistance detection device according to claim 6, characterized in that: When the driver rotates one unit angle, the driver drives the turntable to rotate one unit angle synchronously.

8. The automatic mode control method of the contact resistance detection device according to claim 6, characterized in that: The monitoring of angle, application and monitoring of radial force and monitoring of resistance in the steps may be performed sequentially or simultaneously.

9. A manual mode control method for a contact resistance detection device, for controlling the contact resistance detection device according to any one of claims 1 to 5, characterized in that: Includes steps: Starting the controller; Manually rotate the turntable, and the turntable drives the driver to passively rotate; Monitoring angle: controlling the angle sensor to monitor the rotation angle of the turntable and feed back monitoring data, while receiving the rotation data fed back by the driver; Apply and monitor radial force: control the radial force sensor to apply radial force and obtain radial force data monitored by the radial force sensor; monitor resistance: control the resistance measurement module to monitor the contact resistance value between the inner cavity of the connector and the test needle and feed back the monitoring data; generating a measurement record of the correlation between the angle value, the resistance value and the radial force value and displaying the record on a display; When at least one measurement value in the monitored measurement record exceeds the set parameter value, an alarm is generated and displayed on the display, and if none of them exceeds, the above steps are repeated; After the alarm is generated and displayed on the display, the above steps are repeated until the turntable is manually rotated to complete the set angle rotation.

10. The manual mode control method of the contact resistance detection device according to claim 9, characterized in that: The program logic of the monitoring angle in the steps may be set to continue the current step when the monitoring angle does not change.

Images