An integrated tooling for a test apparatus

Abstract

This application discloses an integrated tooling for a testing device, comprising: a resistor, which includes a first terminal and a second terminal, the first terminal being connected to a first tab of the testing device; and a relay, which includes a common contact, a normally open contact, and a normally closed contact, the common contact being connected to a second tab of the testing device, the normally open contact being connected to the first terminal, and the normally closed contact being connected to the second terminal. When the common contact and the normally closed contact are connected, the first tab is connected to the resistor and then to the second tab, generating a self-test signal; when the common contact and the normally open contact are connected, the first tab is connected to the second tab, generating a zeroing signal. This application integrates the zeroing and self-testing of the testing device into a single tooling by setting a relay to control whether the resistor is connected to the tab of the testing device, thus saving space and material costs.

Description

Technical Field

[0001] This application relates to the field of hardware testing technology, specifically to an integrated tooling for a testing device. Background Technology

[0002] In the existing technology, the AC internal resistance (ACIR) test equipment is used to detect the AC internal resistance of electrical components. By measuring the AC internal resistance, it is possible to verify whether the internal structure of the electrical components meets the process requirements. Therefore, the test results of the test equipment play an important role in product quality and performance evaluation.

[0003] In existing technologies, self-testing and zeroing of testing equipment require the use of tooling. Self-testing requires the actual operating environment of the testing equipment to measure the resistance parameters of the circuits to complete calibration and self-testing. Zeroing requires a separate set of zeroing tooling. Therefore, self-testing and zeroing require the construction of corresponding circuit structures, resulting in two different sets of tooling. This occupies a large amount of production space, increases the space cost of the equipment, and the material resources of the two sets of tooling largely overlap. They also need to be used, managed, and maintained separately, resulting in high labor and material costs. Utility Model Content

[0004] The purpose of this application is to provide an integrated tooling for testing equipment, so as to solve the technical problems of large space occupation and high material cost caused by the need to set up two sets of tooling for zeroing and self-testing in the prior art.

[0005] To address the aforementioned technical problems, embodiments of this application disclose the following technical solutions:

[0006] In a first aspect, embodiments of this application provide an integrated tooling for a testing device, comprising:

[0007] A resistor, the resistor including a first end and a second end, the first end being connected to the first tab of the test equipment;

[0008] A relay, comprising a common contact, a normally open contact, and a normally closed contact, wherein the common contact is connected to the second tab of the test equipment, the normally open contact is connected to the first terminal, and the normally closed contact is connected to the second terminal;

[0009] When the common contact is connected to the normally closed contact, the first tab is connected to the resistor and then to the second tab, generating a self-test signal; when the common contact is connected to the normally open contact, the first tab is connected to the second tab, generating a zeroing signal.

[0010] In one embodiment of this application, the first tab includes a first output tab and a first detection tab, and the second tab includes a second output tab and a second detection tab. When the common contact is connected to the normally closed contact, the first output tab is connected to the first terminal and the second output tab is connected to the second terminal. The testing device is used to transmit a first electrical signal to the resistor. The first detection tab is connected to the first terminal and the second detection tab is connected to the second terminal. The testing device is used to acquire a second electrical signal generated by the resistor based on the first electrical signal. The self-test signal includes the first electrical signal and the second electrical signal.

[0011] When the common contact is connected to the normally open contact, the first detection tab is connected to the second detection tab, and the first output tab is connected to the second output tab, generating the reset signal.

[0012] In one embodiment of this application, the common contact includes a first common contact and a second common contact. The first common contact is connected to the second output tab, and the second common contact is connected to the second detection tab. The normally open contact includes a first normally open contact and a second normally open contact. The normally closed contact includes a first normally closed contact and a second normally closed contact. The first normally open contact and the first normally closed contact are switchably connected to the first common contact. The first normally open contact is also connected to the first output tab. The second normally open contact and the second normally closed contact are switchably connected to the second common contact. The second normally open contact is also connected to the first detection tab.

[0013] In one embodiment of this application, the first end includes a first node and a second node, the first node being connected to the first normally closed contact and the second node being connected to the second normally closed contact. The second end includes a third node and a fourth node, the third node being connected to the first normally open contact and the fourth node being connected to the second normally open contact.

[0014] In one embodiment of this application, a plurality of resistors are included, wherein the first node of each resistor is connected to the first normally closed contact, the second node is connected to the second normally closed contact, the third node is connected to the first normally open contact, and the fourth node is connected to the second normally open contact.

[0015] In one embodiment of this application, the relay and the resistor are both disposed on a circuit board, and the circuit board is provided with pads corresponding to the first terminal and the second terminal.

[0016] In one embodiment of this application, the circuit board has a recessed opening, the resistor is disposed within the opening, and the side of the resistor is exposed outside the circuit board from the opening.

[0017] In one embodiment of this application, the first electrode and the second electrode are rectangular metal sheet structures arranged in an array on a tooling body.

[0018] In one embodiment of this application, the tooling body is provided with a power outlet for connecting to an external voltage source, which provides an input voltage controllably according to a control signal.

[0019] In one embodiment of this application, the tooling body is further provided with a switching power supply, which is connected to the power input port and is used to convert the input voltage.

[0020] In one embodiment of this application, the relay further includes an energized contact for receiving the input voltage. When the energized contact is energized, the common contact is connected to the normally open contact; when the energized contact is de-energized, the common contact is connected to the normally closed contact.

[0021] The beneficial effects of this application are: by setting a relay to control whether the resistor is connected to the tab of the test equipment, this application provides a self-testing environment when the resistor is connected to the test equipment, and when the resistor is disconnected from the test equipment, the tab of the test equipment is short-circuited to clear the zero, thereby integrating the zeroing and self-testing of the test equipment into a set of tooling, saving equipment space and material costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an integrated tooling circuit diagram of the test equipment according to an embodiment of this application;

[0024] Figure 2 This is an integrated tooling circuit diagram of the ACIR testing equipment according to an embodiment of this application;

[0025] Figure 3 This is a diagram of the integrated tooling connection architecture of the ACIR test equipment according to an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of resistors connected in parallel according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of a circuit board according to an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of a circuit board according to an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the tooling body according to an embodiment of this application;

[0030] Figure 8 This is a schematic diagram of the switching power supply connection according to an embodiment of this application.

[0031] Explanation of reference numerals in the attached diagram: 1. Resistor; 11. First terminal; 111. First node; 112. Second node; 12. Second terminal; 121. Third node; 122. Fourth node; 2. Relay; 21. Common contact; 211. First common contact; 212. Second common contact; 22. Normally open contact; 221. First normally open contact; 222. Second normally open contact; 23. Normally closed contact; 231. First normally closed contact; 2 32. Second normally closed contact; 24. Power contact; 31. First tab; 311. First output tab; 312. First detection tab; 32. Second tab; 321. Second output tab; 322. Second detection tab; 4. Fixture body; 41. Power input port; 42. Switching power supply; 43. Indicator light; 44. Voltage divider resistor; 5. Circuit board; 51. Solder pad; 52. Opening; R1. First resistor; R2. Second resistor. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0033] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "stacked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Those skilled in the art who applied for this application noted that in the existing technical solutions, the self-testing and zeroing of the testing equipment require the separate construction of corresponding circuit structures, resulting in two different sets of tooling, occupying a large amount of production space, increasing the space cost of the equipment, and incurring high labor and material costs.

[0035] The application proposes to control whether a resistor is connected to the test equipment's tab by setting a relay. When the resistor is connected to the test equipment, a self-test environment is provided for self-testing. When the resistor is disconnected from the test equipment, the test equipment's tab is short-circuited to zero the circuit. This integrates the zeroing and self-testing of the test equipment into a single tooling, saving space and material costs.

[0036] The specific implementation methods of this application are illustrated below through examples:

[0037] like Figure 1 As shown, this application embodiment provides an integrated tooling for a testing device, including:

[0038] Resistor 1 includes a first end 11 and a second end 12. The first end 11 is connected to the first tab 31 of the test equipment.

[0039] Relay 2 includes a common contact 21, a normally open contact 22 and a normally closed contact 23. The common contact 21 is connected to the second electrode 32 of the test equipment, the normally open contact 22 is connected to the first terminal 11, and the normally closed contact 23 is connected to the second terminal 12.

[0040] When the common contact 21 is connected to the normally closed contact 23, the first tab 31 is connected to the resistor 1 and then to the second tab 32, generating a self-test signal; when the common contact 21 is connected to the normally open contact 22, the first tab 31 is connected to the second tab 32, generating a zeroing signal.

[0041] Specifically, when the common contact 21 of relay 2 is connected to the normally closed contact 23, the circuit is in self-test mode. At this time, the test equipment applies an electrical signal to resistor 1 through the first tab 31 and the second tab 32. Resistor 1 generates a feedback signal based on its own resistance value. The test equipment collects this feedback signal and compares it with the preset standard resistance value parameter to complete the calibration and self-test of its own measurement accuracy.

[0042] When the common contact 21 of relay 2 is connected to the normally open contact 22, the circuit switches to zeroing mode. At this time, the first tab 31 and the second tab 32 are directly short-circuited through the normally open contact 22 of the relay, and resistor 1 is bypassed and no longer participates in the circuit operation. The testing equipment detects the zero-impedance state after the tabs are short-circuited and uses it as the zeroing reference point to establish an accurate zero-point reference.

[0043] In one alternative embodiment, such as Figure 2 , Figure 3 As shown, the testing equipment of this application is an Alternating Current Impedance Resistance (ACIR) testing equipment. The fixture of the ACIR testing equipment has several sets of tabs, each set of tabs including a first tab 31 and a second tab 32. The first tab 31 includes a first output tab 311 and a first detection tab 312, and the second tab 32 includes a second output tab 321 and a second detection tab 322. The first output tab 311 and the second output tab 321 are used as positive and negative terminals to output current to the resistor 1, respectively. The first detection tab 312 and the second detection tab 322 are used to detect the voltage generated by the resistor 1 according to the current.

[0044] With the common contact 21 connected to the normally closed contact 23, the first output tab 311 is connected to the first terminal 11 and the second output tab 321 is connected to the second terminal 12. The test equipment is used to transmit a first electrical signal to the resistor 1. The first detection tab 312 is connected to the first terminal 11 and the second detection tab 322 is connected to the second terminal 12. The test equipment is used to collect the second electrical signal generated by the resistor 1 according to the first electrical signal. The self-test signal includes the first electrical signal and the second electrical signal.

[0045] With the common contact 21 connected to the normally open contact 22, the first detection tab 312 is connected to the second detection tab 322, and the first output tab 311 is connected to the second output tab 321, generating a zeroing signal.

[0046] Correspondingly, the common contact 21 includes a first common contact 211 and a second common contact 212. The first common contact 211 is connected to the second output tab 321, and the second common contact 212 is connected to the second detection tab 322. The normally open contact 22 includes a first normally open contact 221 and a second normally open contact 222. The normally closed contact 23 includes a first normally closed contact 231 and a second normally closed contact 232. The first normally open contact 221 and the first normally closed contact 231 are switchably connected to the first common contact 211. The first normally open contact 221 is also connected to the first output tab 311. The second normally open contact 222 and the second normally closed contact 232 are switchably connected to the second common contact 212. The second normally open contact 222 is also connected to the first detection tab 312.

[0047] Correspondingly, the first end 11 of resistor 1 includes a first node 111 and a second node 112. The first node 111 is connected to the first normally closed contact 231, and the second node 112 is connected to the second normally closed contact 232. The second end 12 includes a third node 121 and a fourth node 122. The third node 121 is connected to the first normally open contact 221, and the fourth node 122 is connected to the second normally open contact 222.

[0048] Specifically, when the common contact 21 of relay 2 is connected to the normally closed contact 23, the ACIR test equipment enters self-test mode. At this time, the circuit forms a four-wire detection loop, and the specific working path is as follows:

[0049] The first output tab 311 is connected to the first node 111 of resistor 1, and the second output tab 321 is connected to the third node 121 of resistor 1. The test equipment injects a first electrical signal (AC current) into resistor 1 through the first output tab 311 and the second output tab 321 to simulate the load environment of real electrical devices.

[0050] The first detection tab 312 is connected to the second node 112 of the resistor 1, and the second detection tab is connected to the fourth node 122 of the resistor 1, for collecting the second electrical signal (voltage signal) generated by the current flowing through the two ends of the resistor 1.

[0051] The testing equipment calculates the actual resistance value of resistor 1 using Ohm's law based on the input first electrical signal (current) and the acquired second electrical signal (voltage), and compares it with the standard resistance value calibrated for resistor 1. If the measured value is consistent with the standard value or the error is within the allowable range, the equipment is deemed to have passed the self-test. If there is a deviation, the internal calibration parameters of the testing equipment are adjusted until the measured value matches the standard value, thus completing the calibration.

[0052] When the common contact 21 of relay 2 is connected to the normally open contact 22, the circuit switches to the reset mode. At this time, the electrode connection relationship is as follows:

[0053] The first output tab 311 and the second output tab 321 are directly shorted to form a low-impedance path, and the test equipment detects that the loop resistance is close to 0Ω.

[0054] The first detection tab 312 and the second detection tab 322 are also directly shorted, and the voltage signal collected by the test equipment is 0V.

[0055] The testing equipment can use the current and voltage signals (0Ω, 0V) at this time as the reference zero point to eliminate the initial error inside the equipment.

[0056] In one alternative embodiment, such as Figure 4 , Figure 5As shown, the device includes multiple resistors 1, each resistor 1 including a first resistor R1 and a second resistor R2. The first node 111 of each resistor 1 is connected to the first normally closed contact 231, the second node 112 is connected to the second normally closed contact 232, the third node 121 is connected to the first normally open contact 221, and the fourth node 122 is connected to the second normally open contact 222.

[0057] Specifically, since the resistance value of a single resistor 1 may not meet the resistance requirements of the test, this application allows multiple resistors 1 to be connected in parallel to obtain the required resistance value. Furthermore, by connecting resistors with different resistance values ​​in parallel, a wide range of impedance simulations can be achieved. For example, if the resistance value of a single first resistor R1 or second resistor R2 is 100mΩ, and the target resistance value is 50mΩ, then the first resistor R1 and the second resistor R2 can be connected in parallel to obtain the equivalent target resistance value of 50mΩ. Similarly, the number of resistors 1 can be increased or decreased to cover a larger detection range and meet the calibration requirements of different electrical components.

[0058] In one alternative embodiment, such as Figure 5 , Figure 6 As shown, relay 2 and resistor 1 are both mounted on a circuit board 5, and the circuit board 5 has pads 51 corresponding to the first terminal 11 and the second terminal 12.

[0059] In one alternative embodiment, such as Figure 6 As shown, the circuit board 5 has a recessed opening 52, the resistor 1 is disposed in the opening 52, and the side of the resistor 1 is exposed outside the circuit board 5 from the opening 52.

[0060] Specifically, in this embodiment, resistor 1 is a high-precision four-legged alloy resistor, which is fixed in the opening 52 by solder pad 51. The long leg side of the alloy resistor is exposed on the outer edge of the circuit board 5. When there is a difference between the initial resistance value and the target value of resistor 1, the long leg side of the resistor exposed outside the opening 52 can be cut to change the resistance value. The cutting method can be laser cutting or manual cutting with a precision tool. After cutting, the resistance is tested and observed, and repeated adjustments are made until the target value requirement is met, thereby realizing flexible adjustment of the resistance value.

[0061] In one alternative embodiment, such as Figure 7 As shown, the first tab 31 and the second tab 32 are rectangular metal sheet structures, arranged in an array on a tooling body 4.

[0062] Specifically, in this application, the tabs of the test equipment are copper strips, fixed on the fixture 4, which is an insulating plate. The tabs, relay 2, and resistor 1 are connected by wires.

[0063] In one alternative embodiment, such as Figure 8 As shown, the tooling body 4 is provided with a power port 41 for connecting an external voltage source, which can controllably provide input voltage according to the control signal.

[0064] Specifically, this application controls the contact switching of relay 2 by outputting control signals from the controller. When the energized contact 24 is energized, it enters the reset mode; when the energized contact 24 is de-energized, it enters the self-test mode, thereby integrating the reset and self-test functions into a set of tooling, saving space and reducing material usage. The controller can be a PLC.

[0065] In one optional embodiment, the tooling body 4 is further provided with a switching power supply 42, which is connected to the power input port 41 and is used to convert the input voltage.

[0066] Specifically, in this application, the conversion voltage of the switching power supply 42 needs to be compatible with the voltage specifications of the relay 2. For example, if the relay 2 is powered by 24V, and the input voltage of the external voltage source is exactly 24V, then the power can be directly supplied to the relay 2 after the power is taken from the power port 41. If the external voltage source is powered by 220V, then an additional switching power supply 42 is needed to perform voltage conversion. After conversion to 24V, the input voltage is supplied to the relay 2. The external voltage source is controlled by a control signal to provide the input voltage.

[0067] More specifically, the switching power supply 42 is also connected to an indicator light 43, which is connected in series with a voltage divider resistor 44. The indicator light 43 serves as a prompt and is used to light up when the relay 2 is energized.

[0068] In an optional embodiment, the relay 2 further includes an energized contact 24 for receiving an input voltage. When the energized contact 24 is energized, the common contact 21 is connected to the normally open contact 22; when the energized contact 24 is de-energized, the common contact 21 is connected to the normally closed contact 23.

[0069] The above provides a detailed description of an integrated tooling for a testing device provided by this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An integrated tooling for a testing device, characterized in that, include: A resistor, the resistor including a first end and a second end, the first end being connected to the first tab of the test equipment; A relay, comprising a common contact, a normally open contact, and a normally closed contact, wherein the common contact is connected to the second tab of the test equipment, the normally open contact is connected to the first terminal, and the normally closed contact is connected to the second terminal; When the common contact is connected to the normally closed contact, the first tab is connected to the resistor and then to the second tab to generate a self-test signal. When the common contact is connected to the normally open contact, the first tab is connected to the second tab, generating a zeroing signal.

2. The integrated tooling for the testing equipment according to claim 1, characterized in that, The first electrode includes a first output electrode and a first detection electrode, and the second electrode includes a second output electrode and a second detection electrode. When the common contact is connected to the normally closed contact, the first output electrode is connected to the first terminal and the second output electrode is connected to the second terminal. The test device is used to transmit a first electrical signal to the resistor. The first detection electrode is connected to the first terminal and the second detection electrode is connected to the second terminal. The test device is used to acquire a second electrical signal generated by the resistor based on the first electrical signal. The self-test signal includes the first electrical signal and the second electrical signal. When the common contact is connected to the normally open contact, the first detection tab is connected to the second detection tab, and the first output tab is connected to the second output tab, generating the reset signal.

3. The integrated tooling for the testing equipment according to claim 2, characterized in that, The common contact includes a first common contact and a second common contact. The first common contact is connected to the second output tab, and the second common contact is connected to the second detection tab. The normally open contact includes a first normally open contact and a second normally open contact. The normally closed contact includes a first normally closed contact and a second normally closed contact. The first normally open contact and the first normally closed contact are switchably connected to the first common contact. The first normally open contact is also connected to the first output tab. The second normally open contact and the second normally closed contact are switchably connected to the second common contact. The second normally open contact is also connected to the first detection tab.

4. The integrated tooling for the testing equipment according to claim 3, characterized in that, The first end includes a first node and a second node. The first node is connected to the first normally closed contact, and the second node is connected to the second normally closed contact. The second end includes a third node and a fourth node. The third node is connected to the first normally open contact, and the fourth node is connected to the second normally open contact.

5. The integrated tooling for the testing equipment according to claim 4, characterized in that, It includes multiple resistors, wherein the first node of each resistor is connected to the first normally closed contact, the second node is connected to the second normally closed contact, the third node is connected to the first normally open contact, and the fourth node is connected to the second normally open contact.

6. The integrated tooling for the testing equipment according to claim 1, characterized in that, Both the relay and the resistor are mounted on a circuit board, which has pads corresponding to the first and second terminals.

7. The integrated tooling for the testing equipment according to claim 6, characterized in that, The circuit board has a recessed opening, the resistor is disposed within the opening, and the side of the resistor is exposed outside the circuit board from the opening.

8. The integrated tooling for the testing equipment according to claim 1, characterized in that, The first electrode and the second electrode are rectangular metal sheet structures arranged in an array on a tooling body.

9. The integrated tooling for the testing equipment according to claim 8, characterized in that, The tooling body is provided with a power input port for connecting to an external voltage source, which provides input voltage controllably according to a control signal.

10. The integrated tooling for the testing equipment according to claim 9, characterized in that, The tooling body is also equipped with a switching power supply, which is connected to the power input port and is used to convert the input voltage.

11. The integrated tooling for the testing equipment according to claim 9, characterized in that, The relay also includes an energized contact for receiving the input voltage. When the energized contact is energized, the common contact is connected to the normally open contact; when the energized contact is de-energized, the common contact is connected to the normally closed contact.

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