Testing instrument
The integrated testing instruments solve the problem of cumbersome multi-device testing for flow meter product harnesses, enabling fast, accurate, and multifunctional testing, thereby improving testing efficiency and product quality.
Patent Information
- Application Number
- CN202422384701.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-09-29
AI Technical Summary
When testing the continuity, insulation, and coil resistance of existing flow meter products, multiple devices are required to test each one individually, resulting in long testing times, a high risk of errors, and susceptibility to operator experience.
An integrated testing instrument was designed, comprising a first terminal module, a second terminal module, a main selection module, an insulation testing module, a continuity testing module, and a resistance testing module. Multifunctional testing is achieved by switching through the main selection module, reducing operational complexity.
It enables fast and accurate multi-functional testing, reduces testing equipment connection errors, and improves testing efficiency and product quality.
Smart Images
Figure CN223513246U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flow meter production and manufacturing, and more specifically, to a testing instrument. Background Technology
[0002] Flow meters require electrodes and coils to measure fluid velocity. The wiring harness connected to the electrodes needs to be tested for continuity and insulation characteristics. Some flow meter products may also have coils within the wiring harness, thus requiring resistance testing of those coils as well. Any deviation in these aspects will affect the flow meter's test results.
[0003] Currently, testing these functions typically requires multiple devices for inspection, with each function requiring individual testing connections to different devices. This process is time-consuming, prone to connection errors, and the test results are easily influenced by the operator's experience. Utility Model Content
[0004] In view of this, the present invention proposes a testing instrument to solve all or some of the above problems.
[0005] A testing instrument according to an embodiment of the present invention includes a first terminal module, a second terminal module, a main selection module, an insulation testing module, a continuity testing module, and a resistance testing module. The first terminal module is used for terminal connections to a first end of the product under test (PUT), and the second terminal module is used for terminal connections to a second end of the PUT. The insulation testing module, the continuity testing module, and the resistance testing module are respectively connected to the main selection module and are configured to be switchably activated via the main selection module. The insulation testing module is adapted to perform insulation testing between different terminals of the first end of the PUT. The continuity testing module is adapted to test the connectivity between corresponding terminals of the first end and the second end of the PUT. The resistance testing module is adapted to test the resistance of the coil connected between the first end and the second end of the PUT.
[0006] Furthermore, the main selection module includes a main selection switch and a continuity test connection circuit and an insulation / resistance test connection circuit that can be switched on by the main selection switch. The continuity test connection circuit is connected to the continuity test module, and the insulation / resistance test connection circuit is connected to the insulation test module and the resistance test module, respectively.
[0007] Furthermore, the insulation test module includes an insulation test target selection circuit, an insulation test circuit, and an insulation value display module. The insulation test target selection circuit includes an insulation selection switch for selecting the insulation test target terminal. The insulation test circuit is connected to the insulation test target selection circuit to test the insulation of the insulation test target terminal. The insulation value display module is connected to the insulation test circuit to display the insulation value obtained from the test.
[0008] Furthermore, the insulation test circuit and the insulation value display module are integrated into the first multimeter.
[0009] Furthermore, the resistance testing module includes a product type selection circuit, a resistance testing circuit, and a resistance display module. The product type selection circuit includes a switch for toggling whether a product has a coil. The resistance testing circuit is connected to the product type selection circuit to test the resistance of the coil. The resistance display module is connected to the resistance testing circuit to display the tested resistance value.
[0010] Furthermore, the resistance testing circuit and the resistance display module are integrated into the second multimeter.
[0011] Furthermore, the continuity test module includes a continuity circuit, a diode, and an indicator light, wherein the continuity circuit is connected between corresponding terminals of the first end and the second end of the product under test, the diode is connected to the continuity circuit to turn on when the continuity circuit is conducting, and the indicator light is connected to the diode to light up when the diode is turned on.
[0012] Furthermore, the first end of the product under test has a first terminal, a second terminal, and a third terminal, and the second end of the product under test has a fourth terminal, a fifth terminal, and a sixth terminal. The testing instrument is adapted to test the insulation between the first terminal and the second terminal, and the insulation between the second terminal and the third terminal; and to test the continuity between the first terminal and the fourth terminal, the continuity between the second terminal and the fifth terminal, and the continuity between the third terminal and the sixth terminal.
[0013] Furthermore, the product under test has a coil, which is connected to the first end of the product under test through a first end and a second end, and to the second end of the product under test through a third end and a fourth end. The testing instrument is also adapted to test the continuity between the first end and the third end of the coil, and the continuity between the second end and the fourth end of the coil.
[0014] Furthermore, a foolproof device is provided below the first terminal module.
[0015] According to one embodiment of the present invention, a testing instrument integrates a first terminal module for connecting to the first end of the product under test, a second terminal module for connecting to the second end of the product under test, a main selection module, an insulation testing module, a continuity testing module, and a resistance testing module. By controlling the main selection module, the insulation testing module, the continuity testing module, or the resistance testing module can be activated to test the insulation and continuity of the wire harness of the product under test, or to test the resistance of the coil of the product under test. This achieves multi-functional testing after plugging in, reducing the inefficiency, complexity, and error-proneness caused by constantly connecting and disconnecting wires to connect to different testing devices for separate testing during operation. This avoids performance problems in the tested product and ensures the quality of the tested product. Attached Figure Description
[0016] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the above and other features and advantages of the present invention, in which:
[0017] Figure 1 This is a schematic diagram of the circuit connection structure of a testing instrument according to an embodiment of the present invention;
[0018] Figure 2 This is a schematic diagram of the overall structure of a testing instrument according to an embodiment of the present invention;
[0019] Figure 3 This is a schematic diagram of the terminal connections of the product under test for use with a testing instrument according to an embodiment of the present invention;
[0020] Figure 4 This is a schematic diagram of the terminal connections of the product under test for use with the testing instrument according to another embodiment of the present invention;
[0021] The reference numerals in the attached figures are as follows:
[0022] 1. First terminal module; 2. Second terminal module; 3. Insulation test module; 5. Continuity test module;
[0023] 7. Resistance test module; 10. Main selector switch; 11. Continuity test connection circuit; 12. Insulation / resistance test connection circuit;
[0024] 31 Insulation test target selection circuit; 33 Insulation test circuit; 35 Insulation value display module; 51 Conduction circuit;
[0025] 53 Diode; 55 Indicator Light; 71 Product Type Selection Circuit; 73 Resistance Test Circuit;
[0026] 75Ω resistance display module; a1 first terminal; b1 second terminal; c1 third terminal;
[0027] a2 fourth terminal; b2 fifth terminal; c2 sixth terminal; d1 first terminal of coil;
[0028] The second terminal of coil e1; the third terminal of coil d2; the fourth terminal of coil e2; independent terminals b21 and b22.
[0029] 90. Fooling protection; 100. Power supply; 102. Coil;
[0030] 311 Insulation Selector Switch; 330 Insulation Test Start Switch; 711 Product Selector Switch Detailed Implementation
[0031] To make the objectives, technical solutions and advantages of this utility model clearer, the following embodiments will be used to further describe this utility model in detail.
[0032] Figure 1 This is a schematic diagram of the circuit connection structure of a testing instrument according to an embodiment of the present invention;
[0033] like Figure 1 As shown, the testing instrument includes a first terminal module 1, a second terminal module 2, a main selection module, an insulation testing module 3, a continuity testing module 5, and a resistance testing module 7. The first terminal module 1 is used for terminal connections to the first end of the product under test (DUT), and the second terminal module 2 is used for terminal connections to the second end of the DUT. The insulation testing module 3, the continuity testing module 5, and the resistance testing module 7 are respectively connected to the main selection module and are configured to be switchably connected via the main selection module. The insulation testing module 3 is adapted to perform insulation testing between different terminals of the first end of the DUT. The continuity testing module 5 is adapted to test the connectivity between the terminals of the first end of the DUT and corresponding terminals of the second end of the DUT. The resistance testing module 7 is adapted to test the resistance of the coil connected between the first end and the second end of the DUT.
[0034] In one embodiment, the main selection module includes a main selection switch 10 and a continuity test connection circuit 11 and an insulation / resistance test connection circuit 12 that can be switched on by the main selection switch 10. The continuity test connection circuit 11 is connected to the continuity test module 5, and the insulation / resistance test connection circuit 12 is connected to the insulation test module 3 and the resistance test module 7, respectively.
[0035] In this embodiment, the main selection switch 10 can be switched to either the continuity test connection circuit 11 or the insulation / resistance test connection circuit 12. When a continuity test is required, the main selection switch 10 is switched to the continuity test connection circuit 11 to connect with the continuity test module 5, thereby performing the continuity test. When an insulation / resistance test is required, the main selection switch 10 is switched to the insulation / resistance test connection circuit 12 to connect with the insulation test module 3 and the resistance test module 7, thereby performing the insulation test and the resistance test respectively. Specifically, the continuity test connection circuit 11 and the insulation / resistance test connection circuit 12 can be circuits connected by multiple relays, as long as they meet the on / off requirements; no strict limitations are imposed here.
[0036] Figure 2 This is a schematic diagram of the overall structure of a testing instrument according to an embodiment of the present invention; as shown below. Figure 2 As shown, the testing instrument is configured as an integrated unit. The main selection switch 10 allows selection between continuity testing and insulation / resistance testing. When the main selection switch 10 is switched to continuity testing, a continuity test is performed directly on the product under test. When the main selection switch 10 is switched to insulation / resistance testing, insulation and / or resistance tests can be performed on the product under test.
[0037] like Figure 1 and Figure 2 As shown, the insulation test module 3 includes an insulation test circuit 33, an insulation test target selection circuit 31, and an insulation value display module 35. The insulation test target selection circuit 31 includes an insulation selection switch 311 for selecting the insulation test target terminal. The insulation test circuit 33 is connected to the insulation test target selection circuit 31 to test the insulation of the insulation test target terminal. The insulation value display module 35 is connected to the insulation test circuit 33 to display the insulation value obtained from the test.
[0038] Specifically, when the main selector switch 10 is switched to insulation / resistance test, insulation testing can be performed on the product under test. The insulation test target selection circuit 31 includes an insulation selector switch 311. When the insulation selector switch 311 is switched to the first target position, the insulation test circuit 33 performs insulation testing on the corresponding first insulation test target terminal on the first terminal module 1; when the insulation selector switch 311 is switched to the second target position, the insulation test circuit 33 performs insulation testing on the corresponding second insulation test target terminal on the first terminal module.
[0039] In one embodiment, the insulation test circuit 33 includes an insulation test start switch 330. After selecting a first insulation test target range or a second insulation test target range, operating the insulation test start switch 330 outputs a voltage, for example, 1000V, to the first insulation test target terminal or the second insulation test target terminal of the product under test. How the insulation test circuit 33 is configured to achieve the purpose of insulation testing is a technique well-known to those skilled in the art and will not be described further. After the insulation test is completed, the insulation test display module can display the obtained insulation value.
[0040] In one embodiment, the insulation test circuit 33 and the insulation value display module 35 are integrated into a first multimeter.
[0041] like Figure 1 and Figure 2 As shown, the resistance testing module 7 includes a resistance testing circuit 73, a product type selection circuit 71, and a resistance display module 75. The product type selection circuit 71 includes a product selection switch 711 for switching between whether a product has a coil. The resistance testing circuit 73 is connected to the product type selection circuit 71 to test the resistance of the coil. The resistance display module 75 is connected to the resistance testing circuit 73 to display the tested resistance value.
[0042] In one embodiment, the resistance testing circuit 73 and the resistance display module 75 are integrated into a second multimeter.
[0043] The setup of the resistance testing circuit 73 to achieve the purpose of resistance testing is a technique well-known to those skilled in the art and will not be elaborated here. After the resistance test is completed, the resistance test display module can display the obtained resistance value.
[0044] In one embodiment, the continuity test module 5 includes a continuity circuit 51, a diode 53, and an indicator light 55, wherein the continuity circuit 51 is connected between corresponding terminals of the first end and the second end of the product under test, the diode 53 is connected to the continuity circuit 51 to turn on when the continuity circuit 51 is on, and the indicator light 55 is connected to the diode 53 to light up when the diode 53 is on.
[0045] like Figure 2 As shown, it also includes a power switch 100 for power control.
[0046] Based on the above embodiments, the continuity function between corresponding terminals of the first and second ends of the product under test can be measured, and the indicator light 55 can be used to directly see which terminal connection circuit is in a conducting state and which terminal connection circuit is in a disconnected state, so as to facilitate maintenance.
[0047] According to another embodiment of the present invention, the first end of the product under test has a first terminal, a second terminal and a third terminal, and the second end of the product under test has a fourth terminal, a fifth terminal and a sixth terminal. The testing instrument is adapted to test the insulation between the first terminal and the second terminal, the insulation between the second terminal and the third terminal, and the continuity between the first terminal and the fourth terminal, the continuity between the second terminal and the fifth terminal, and the continuity between the third terminal and the sixth terminal.
[0048] Figure 3 This is a schematic diagram of the terminal connections of the test instrument according to an embodiment of the present invention, applicable to the product under test; as shown. Figure 3 As shown, for the product under test applicable to the testing instrument of one embodiment of this utility model, the first end of the wire harness has a first terminal, a second terminal, and a third terminal. The first terminal is connected to a fourth terminal of the second end of the wire harness via the wire harness, the second terminal is connected to a fifth terminal of the second end of the wire harness via the wire harness, and the third terminal is connected to a fifth terminal of the second end of the wire harness via the wire harness. During testing, the first terminal, the second terminal, and the third terminal (terminal number 83) are respectively inserted into the corresponding interfaces in the first terminal module 1 of the testing instrument, and the fourth terminal, the fifth terminal, and the sixth terminal are respectively inserted into the corresponding interfaces in the second terminal module 2 of the testing instrument. The insulation between the first terminal and the second terminal, the insulation between the second terminal and the third terminal, the continuity between the first terminal and the fourth terminal, the continuity between the second terminal and the fifth terminal, and the continuity between the third terminal and the sixth terminal are tested.
[0049] According to another embodiment of the present invention, the product under test has a coil, the coil is connected to a first end of the product under test through a first end d1 and a second end e1, and is connected to a second end of the product under test through a third end and a fourth end. The testing instrument is also adapted to test the continuity between the first end d1 and the third end of the coil, and the continuity between the second end e1 and the fourth end of the coil.
[0050] Figure 4 This is a schematic diagram of the terminal connections of the product under test for use with a testing instrument according to another embodiment of the present invention; as shown. Figure 4As shown, a coil is also provided between the two opposite ends of the wire harness of the product under test. The coil has a first coil terminal d1 and a second coil terminal e1 connected to the first end of the product under test, and a third coil terminal and a fourth coil terminal connected to the second end of the product under test. When the product under test has a coil, the resistance value of the coil also needs to be tested. During testing, the first coil terminal d1 and the second coil terminal e1 are connected to the interface of the first terminal module 1 of the testing instrument, and the third coil terminal and the fourth coil terminal are connected to the interface of the second terminal module 2 of the testing instrument, so that the resistance value of the coil can be tested using the testing instrument.
[0051] In another embodiment, the fifth terminal of the second end of the product under test is divided into two independent terminals b21 and b22. These two independent terminals are respectively connected to the second terminal b1 of the first end of the product under test. When testing the connectivity, the two independent terminals b21 and b22 of the fifth terminal need to be inserted into the second terminal module 2 respectively to test the connectivity between the two independent terminals and the second terminal b1.
[0052] According to another embodiment of this utility model, the product to be tested is a flow meter. The flow meter is provided with electrodes and a wire harness connected to the electrodes, and a coil is optionally provided between the two ends of the wire harness.
[0053] According to another embodiment of the present invention, the testing instrument further includes a power switch, which is connected to an external power supply device.
[0054] According to another embodiment of the present invention, a foolproof element 90 is provided below the first terminal module 1. The foolproof element 90, for example, has an upward protruding portion to prevent the terminal of the first end of the product to be tested from being inserted into the first terminal module 1 in the wrong direction.
[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A testing instrument suitable for testing the function of coils or wire harnesses of a product under test, characterized in that, The device includes a first terminal module (1), a second terminal module (2), a main selection module, an insulation test module (3), a continuity test module (5), and a resistance test module (7). The first terminal module (1) is used to connect the terminals of the first end of the product under test, and the second terminal module (2) is used to connect the terminals of the second end of the product under test. The insulation test module (3), the continuity test module (5), and the resistance test module (7) are respectively connected to the main selection module and are configured to be switchably connected via the main selection module. The insulation test module (3) is adapted to perform insulation tests between different terminals of the first end of the product under test. The continuity test module (5) is adapted to test the connectivity between the terminals of the first end of the product under test and the corresponding terminals of the second end of the product under test. The resistance test module (7) is adapted to test the resistance of the coil connected between the first end and the second end of the product under test.
2. The testing instrument according to claim 1, characterized in that, The main selection module includes a main selection switch (10) and a continuity test connection circuit (11) and an insulation / resistance test connection circuit (12) that can be switched on by the main selection switch (10). The continuity test connection circuit (11) is connected to the continuity test module (5), and the insulation / resistance test connection circuit (12) is connected to the insulation test module (3) and the resistance test module (7) respectively.
3. The testing instrument according to claim 1 or 2, characterized in that, The insulation test module (3) includes an insulation test target selection circuit (31), an insulation test circuit (33), and an insulation value display module (35). The insulation test target selection circuit (31) includes an insulation selection switch (311) for selecting the insulation test target terminal. The insulation test circuit (33) is connected to the insulation test target selection circuit (31) to test the insulation of the insulation test target terminal. The insulation value display module (35) is connected to the insulation test circuit (33) to display the insulation value obtained from the test.
4. The testing instrument according to claim 3, characterized in that, The insulation test circuit (33) and the insulation value display module (35) are integrated into the first multimeter.
5. The testing instrument according to claim 1 or 2, characterized in that, The resistance test module (7) includes a product type selection circuit (71), a resistance test circuit (73), and a resistance display module (75). The product type selection circuit (71) includes a product selection switch (711) for switching between selecting whether a product has a coil. The resistance test circuit (73) is connected to the product type selection circuit (71) to test the resistance of the coil. The resistance display module (75) is connected to the resistance test circuit (73) to display the resistance value obtained from the test.
6. The testing instrument according to claim 5, characterized in that, The resistance test circuit (73) and the resistance display module (75) are integrated into the second multimeter.
7. The testing instrument according to claim 1 or 2, characterized in that, The continuity test module (5) includes a continuity circuit (51), a diode (53), and an indicator light (55). The continuity circuit (51) is connected between corresponding terminals of the first end and the second end of the product under test. The diode (53) is connected to the continuity circuit (51) to turn on when the continuity circuit (51) is on. The indicator light (55) is connected to the diode (53) to light up when the diode (53) is on.
8. The testing instrument according to claim 1, characterized in that, The first end of the product under test has a first terminal (a1), a second terminal (b1), and a third terminal (c1), and the second end of the product under test has a fourth terminal (a2), a fifth terminal (b2), and a sixth terminal (c2). The testing instrument is adapted to test the insulation between the first terminal (a1) and the second terminal (b1), the insulation between the second terminal (b1) and the third terminal (c1), and the continuity between the first terminal (a1) and the fourth terminal (a2), the continuity between the second terminal (b1) and the fifth terminal (b2), and the continuity between the third terminal (c1) and the sixth terminal (c2).
9. The testing instrument according to claim 1 or 2, characterized in that, The product under test has a coil (102), which is connected to the first end of the product under test through a first end (d1) and a second end (e1), and to the second end of the product under test through a third end (d2) and a fourth end (e2). The testing instrument is also adapted to test the continuity between the first end (d1) and the third end (d2) of the coil, and the continuity between the second end (e1) and the fourth end (e2) of the coil.
10. The testing instrument according to claim 1 or 2, characterized in that, A foolproof component (90) is provided below the first terminal module (1).