Test tool and test system
By designing a multi-voltage output test tooling, the high cost and low efficiency problems caused by the development of multiple test tooling in the prior art due to the need to develop different specifications of products, and efficient testing is achieved for a variety of working voltage equipment.
Patent Information
- Application Number
- CN202421574779.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-04
AI Technical Summary
When testing products of different specifications, the prior art requires the development of a variety of test tooling of different specifications, resulting in high testing costs and low efficiency.
A test tool is designed, which includes a test board and a power supply circuit. The power supply circuit can output a variety of voltages through at least two voltage conversion circuits and switches, which is suitable for the equipment under test of different working voltages.
It realizes that a power supply circuit can be suitable for the equipment under test with different working voltages, reduces the need to develop a variety of test tooling, reduces the testing cost, and improves the testing efficiency.
Smart Images
Figure CN222825631U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of testing, in particular to a testing tool and a testing system. Background Art
[0002] Before testing the product, it is necessary to develop test tools. Generally, different specifications of test tools need to be developed for products of different specifications for one-to-one testing. For example, for sensors with different working voltages, it is necessary to develop test tools with corresponding voltages, which increases the testing cost. Utility Model Content
[0003] The utility model provides a testing tool and a testing system, which can reduce the testing cost and improve the testing efficiency.
[0004] In a first aspect, the utility model provides a test tool, which includes: a test board, the test board includes a power supply circuit; the power supply circuit includes at least two voltage conversion circuits, a first switch and a first connector, the first ends of the at least two voltage conversion circuits are electrically connected to the voltage input interface of the test board, the second ends of the at least two voltage conversion circuits are respectively electrically connected to the first ends of at least two sub-switches in the first switch, the second ends of the at least two sub-switches in the first switch are electrically connected to each other and to the first connector, and the first connector outputs voltage.
[0005] In a possible implementation, the test board includes multiple power supply circuits.
[0006] In a possible implementation, there are multiple first connectors, the multiple first connectors are electrically connected to each other, and the numbers of pins included in the multiple first connectors are different.
[0007] In a possible implementation manner, the test board has multiple voltage input interfaces, and the multiple voltage input interfaces are electrically connected.
[0008] In a possible implementation, the test tool includes a plurality of test boards, and the plurality of test boards are electrically connected to a power supply via a plurality of voltage input interfaces.
[0009] In one possible embodiment, the voltage conversion circuit includes a first voltage-dividing resistor and a second voltage-dividing resistor, the first end of the first voltage-dividing resistor is the first end of the voltage conversion circuit, the first end of the second voltage-dividing resistor is electrically connected to the second end of the first voltage-dividing resistor and is electrically connected to the first end of one of the at least two sub-switches in the first switch, and the second end of the second voltage-dividing resistor is grounded.
[0010] In a possible embodiment, the test board also includes a switching circuit, and the first ends of at least two voltage conversion circuits are electrically connected to the voltage input interface of the test board, including: the first ends of at least two voltage conversion circuits are electrically connected to the first end of the switching circuit, and the second end of the switching circuit is electrically connected to the voltage input interface of the test board.
[0011] In a second aspect, the utility model provides a test system, which includes: a power supply, a device under test, and a test tool as any possible implementation method of the first aspect; wherein the power supply is electrically connected to the test tool, and the test board is electrically connected to the device under test.
[0012] The test fixture and test system provided by the utility model change the output voltage of the power supply circuit by electrically connecting at least two voltage conversion circuits in the power supply circuit to different switches of the first switch, so that one power supply circuit can supply power to the devices under test with different working voltages, and there is no need to develop a variety of different test fixtures for the devices under test with different specifications, which can reduce costs. In addition, when the working voltage of the device under test is different, it is only necessary to close the switch corresponding to the voltage, which is simple to operate and can improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 A schematic diagram of a test board provided by the utility model;
[0014] Figure 2 A schematic diagram of another test board provided by the utility model;
[0015] Figure 3 A schematic diagram of another test board provided by the utility model;
[0016] Figure 4 A schematic diagram of the connection between a test board and a power supply provided by the utility model;
[0017] Figure 5 A schematic diagram of another test board provided by the utility model;
[0018] Figure 6 A circuit diagram of another switch circuit provided by the utility model;
[0019] Figure 7 A circuit diagram of a voltage conversion circuit provided by the utility model;
[0020] Figure 8 A circuit diagram of another voltage conversion circuit provided by the utility model. DETAILED DESCRIPTION
[0021] The utility model will be described in detail below by way of embodiments, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be appreciated by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and simplicity, the description of known functions and structures is omitted in the following description. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.
[0022] The test fixture and test system provided in this application can be applied to various test scenarios, such as but not limited to aging test. The device under test can be various electronic devices, such as but not limited to sensors, such as water quality sensors, etc.
[0023] Combination Figure 1 The test fixture provided by the utility model includes a test board 01, and the test board 01 includes a power supply circuit 100. The power supply circuit 100 includes at least two voltage conversion circuits 1, a first switch 2 and a first connector 3. Figure 1 In the figure, a power supply circuit 100 including four voltage conversion circuits 1 is used as an example for illustration. The first switch 2 includes at least two sub-switches, and the sub-switches of different paths are used to control voltages of different magnitudes. The first ends of at least two voltage conversion circuits 1 are electrically connected to the voltage input interface 2 of the test board, and the second ends of at least two voltage conversion circuits 1 are respectively electrically connected to the first ends of at least two sub-switches in the first switch 2, and the second ends of at least two sub-switches in the first switch 2 are electrically connected to each other and to the first connector 3, and the first connector 3 outputs voltage.
[0024] Exemplary, combined Figure 1 The output voltages of the four voltage conversion circuits 1 can be 3.7V, 5V, 12V, and 16.8V respectively. The first connector 3 is electrically connected to the device under test. In this way, when powering the device under test with an operating voltage of 3.7V, the switch corresponding to the voltage conversion circuit 1 that outputs 3.7V can be closed, so that the voltage at the first connector 3 is 3.7V, and the device under test is powered.
[0025] In this way, at least two voltage conversion circuits 1 output different voltages respectively, and at least two voltage conversion circuits 1 are electrically connected to different path switches of the first switch 2 respectively. By closing different path switches of the first switch 2, the output voltage of the power supply circuit 100 can be changed, so that one power supply circuit 100 can supply power to the devices under test with different working voltages, and there is no need to develop a variety of different test tools for devices under test of different specifications, which can reduce costs. In addition, when the working voltage of the device under test is different, only the path switch corresponding to the voltage needs to be closed, which is simple to operate and can improve test efficiency.
[0026] Optionally, the first switch 2 may be a dip switch. The dip switch is composed of a plurality of switch units, and the at least two sub-switches of the first switch 2 refer to at least two switch units in the dip switch. Figure 1 , the first switch 2 can be a four-position dip switch.
[0027] In some embodiments, there may be multiple first connectors 3 , the multiple first connectors 3 are electrically connected to each other, and the number of pins included in the multiple first connectors 3 may be different. Figure 1 In the example, the number of the first connectors is 2. The power supply circuit 100 is electrically connected to the connector of the device under test through the first connector 3 to supply power. The power supply circuit 100 includes different types of connectors, which can make the power supply circuit 100 applicable to more types of devices under test, facilitate testing, and avoid increasing testing difficulty due to connector mismatch.
[0028] Combination Figure 1 For example, one first connector 3 may be a 4-position connector, and another first connector 3 may be a 2-position connector. The present application does not limit the type of the first connector, for example, the first connector may be, but is not limited to, a plug-in connector.
[0029] In some embodiments, the test board 01 may include multiple power supply circuits 100. The multiple power supply circuits 100 may work independently, output the same voltage or different voltages, and meet various test requirements.
[0030] Figure 2 Taking two power supply circuits 100 as an example, the first ends of the power conversion circuits 1 of the two power supply circuits 100 are electrically connected to the voltage input interface 4 of the test board, and the first connectors 3 of the two power supply circuits 100 are respectively connected to different test devices 5. In this way, the test board 01 can supply power to multiple test devices at the same time, perform batch testing, and improve test efficiency. It can also supply power to test devices with multiple working voltages at the same time. For example, one power supply circuit 100 outputs 5V and the other power supply circuit 100 outputs 12V, which can meet multiple test requirements and further improve test efficiency.
[0031] In some embodiments, the number of the voltage input interfaces 4 of the test board 01 may be multiple, and the multiple voltage input interfaces 4 are electrically connected.
[0032] Exemplarily, the voltage input interface 4 may be a connector, for example, may be but not limited to a 4-position connector. The present application does not limit the type of the voltage input interface 4, for example, the voltage input interface 4 may be but not limited to a plug-in connector.
[0033] Figure 3For example, the number of the voltage input interfaces 4 is two and the number of the power supply circuits 100 is two, and the two voltage input interfaces 4 are electrically connected.
[0034] It should be noted that when the number of the voltage input interfaces 4 is multiple, the number of the power supply circuits 100 may be one or more. Figure 3 This is only an example and does not constitute a limitation of this application.
[0035] In some embodiments, the test tool may include multiple test boards 01 , and the multiple test boards 01 are electrically connected to a power supply 6 through multiple voltage input interfaces 4 .
[0036] like Figure 4 As shown, taking the test tooling including three test boards 01 as an example, the voltage input interface 4 of one of the three test boards 01 is electrically connected to the power supply 6, and the test board 01 is cascaded with the other two test boards 01 through the voltage input interface 4 to achieve expansion. If the power supply power permits, as many test boards 01 as possible can be cascaded to perform batch power supply and improve test efficiency. It is also possible to complete batch testing by using as little power supply as possible and reduce test costs.
[0037] This application does not limit the way in which multiple test boards 01 are electrically connected to a power supply 6 through multiple voltage input interfaces 4. Figure 4 This is just an example.
[0038] In some embodiments, the test board 01 may further include a switch circuit 200, and the first ends of the at least two voltage conversion circuits 1 are electrically connected to the voltage input interface 4 of the test board 01, which may include: the first ends of the at least two voltage conversion circuits 1 are electrically connected to the first ends of the switch circuit 200, and the second end of the switch circuit 200 is electrically connected to the voltage input interface 4 of the test board 01, such as Figure 5 shown.
[0039] Each power supply circuit 100 controls whether to supply power through a separate switch circuit 200. In this way, after the test of a device under test is completed, the power supply of the device under test can be disconnected separately through the switch circuit 200, which will not affect the normal testing of other devices under test and can improve the test diversity.
[0040] Optionally, the switch circuit 200 may be a switch, such as a touch switch. Alternatively, the switch circuit 200 may include a switch, such as a touch switch. Alternatively, the switch circuit 200 may include a switch, such as a touch switch. Figure 6 The circuit shown.
[0041] For example, Figure 6As shown, the switch circuit 200 may include a chip U32, pins 6 and 9 of the chip U32 are grounded, and pin 4 of the chip U32 may be electrically connected to the second end of the first switch 2 to monitor the output voltage of the power supply circuit. Pin 5 of the chip U32 is connected to one end of the resistor R129 and the resistor R130, and the other end of the resistor R129 is connected to pins 4 and 5 of the switch K11, and pin 7 of the chip U32 is connected to pin 6 of the switch K11, one end of the capacitor C51, one end of the capacitor C52, the positive electrode of the electrolytic capacitor E42, and the negative electrode of the inductor L21, and the other end of the resistor R130 and the other end of the capacitor C51, the other end of the capacitor C52, the negative electrode of the electrolytic capacitor E42, and the negative electrode of the electrolytic capacitor E41 are all grounded, and the positive electrode of the electrolytic capacitor E41 is connected to the positive electrode of the inductor L21 and the negative electrode of the Schottky diode D31, and the positive electrode of the Schottky diode D31 can be electrically connected to the positive electrode of the power supply, for example, it can be connected to the power supply inlet 4 of the test board 01.
[0042] Pin 8 of chip U32 is connected to one end of capacitor C54, the cathode of diode D32, and the anode of inductor L22. Pin 1 of chip U32 is connected to the other end of capacitor C54. The cathode of inductor L22 is connected to the anode of electrolytic capacitor E43, the anode of electrolytic capacitor E44 and one end of capacitor C53 to form a first node. Optionally, the first node is electrically connected to the first end of voltage conversion circuit 1 of power supply circuit 100. The anode of diode D32 and the cathode of electrolytic capacitor E43, the cathode of electrolytic capacitor E44 and the other end of capacitor C53 are all grounded. The models of various components included in switch circuit 200 can be as follows: Figure 6 The one shown is just an example.
[0043] In some embodiments, the voltage conversion circuit 1 may include a first voltage dividing resistor R1 and a second voltage dividing resistor R2. Figure 7 , the first end of the first voltage-dividing resistor R1 is the first end of the voltage conversion circuit 1, the first end of the second voltage-dividing resistor R2 is electrically connected to the second end of the first voltage-dividing resistor R1 and is electrically connected to the first end of one of the at least two sub-switches in the first switch 2, Figure 7 In the example, the first switch 2 includes a 4-way switch, and the second end of the second voltage-dividing resistor R2 is grounded.
[0044] For example, Figure 8 As shown, the four voltage conversion circuits 1 are electrically connected to the first ends of the four sub-switches of the first switch 2 (U31), respectively. The four voltage conversion circuits 1 output 5V, 16.8V, 3.7V, and 12V voltages respectively. The specific models of the voltage divider resistors can be as follows: Figure 8 The one shown is just an example.
[0045] The utility model also provides a test system, which includes: a power supply, a device under test, and any possible test fixture described in the above embodiments. The power supply is electrically connected to the test fixture, and the test board is electrically connected to the device under test. For example, the power supply is electrically connected to the voltage input interface of the test board of the test fixture, and the first connector of the test board is electrically connected to the device under test.
[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.
Claims
1. A test tool, characterized in that: include: A test board, the test board comprising a power supply circuit; The power supply circuit includes at least two voltage conversion circuits, a first switch and a first connector. The first ends of the at least two voltage conversion circuits are electrically connected to the voltage input interface of the test board, the second ends of the at least two voltage conversion circuits are respectively electrically connected to the first ends of at least two sub-switches in the first switch, the second ends of at least two sub-switches in the first switch are electrically connected to each other and to the first connector, and the first connector outputs voltage.
2. The test tool according to claim 1, characterized in that: The test board includes a plurality of the power supply circuits.
3. The test tool according to claim 1, characterized in that: There are multiple first connectors, the multiple first connectors are electrically connected to each other, and the numbers of pins included in the multiple first connectors are different.
4. The test tool according to any one of claims 1 to 3, characterized in that: The test board has multiple voltage input interfaces, and the multiple voltage input interfaces are electrically connected.
5. The test tool according to claim 4, characterized in that: The testing tool comprises a plurality of testing boards, and the plurality of testing boards are electrically connected to a power supply via the plurality of voltage input interfaces.
6. The test tool according to any one of claims 1 to 3, characterized in that: The voltage conversion circuit includes a first voltage-dividing resistor and a second voltage-dividing resistor, wherein the first end of the first voltage-dividing resistor is the first end of the voltage conversion circuit, the first end of the second voltage-dividing resistor is electrically connected to the second end of the first voltage-dividing resistor and to the first end of one of the at least two sub-switches, and the second end of the second voltage-dividing resistor is grounded.
7. The test tool according to any one of claims 1 to 3, characterized in that: The test board further includes a switch circuit, and the first ends of the at least two voltage conversion circuits are electrically connected to the voltage input interface of the test board, including: The first ends of the at least two voltage conversion circuits are electrically connected to the first end of the switch circuit, and the second end of the switch circuit is electrically connected to the voltage input interface of the test board.
8. A testing system, characterized in that: The test system comprises: a power supply, a device under test, and a test tool as claimed in any one of claims 1 to 7; Wherein, the power supply is electrically connected to the test fixture, and the test board is electrically connected to the device under test.