Low-voltage terminal tin connection detection device and heavy-load FCT test tool
By designing a low-voltage terminal solder bridging detection device, which uses a relay board and a resistance detection unit to detect the resistance of low-voltage terminals, the problem of not being able to detect solder bridging during heavy-load testing is solved, thus improving the reliability and stability of the equipment.
Patent Information
- Application Number
- CN202423136330.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-18
AI Technical Summary
In existing technologies, heavy-load testing cannot detect whether there is solder bridging at the low-voltage terminals of the controller, which leads to accelerated aging or damage of components and affects the stability and reliability of the equipment.
Design a low-voltage terminal solder bridging detection device, including a power module, an interface module and a test module. The device detects the resistance between low-voltage terminals through a relay board and a resistance detection unit to determine whether solder bridging exists.
Effective detection of solder bridging at low-voltage terminals avoids component aging or damage caused by prolonged short circuits, thus improving the reliability and stability of equipment shipments.
Smart Images
Figure CN223770371U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of tin connection detection, and relates to a low-voltage terminal tin connection detection device, in particular to a low-voltage terminal tin connection detection device and a heavy-load FCT test tool. BACKGROUND
[0002] In the industrial field, in order to ensure the stability of operation, the key operation is still widely used as a mainstream solution for electronic products, especially controllers. Before being shipped, the controllers need to be tested under heavy load to ensure the normal function of the controllers. For the controllers packaged with a shell, low-voltage terminals need to be welded to enable the customers to use the plug directly.
[0003] In actual application, if short circuit occurs between PIN pins, the plug can be directly inserted for use in normal operation, and the normal operation test may not be detected. For example, when LIN communication is used, CANH and CANL are short-circuited, which does not affect the test, and the short circuit between high-voltage interlocking pins also does not affect.
[0004] Although the tin connection between the low-voltage terminals of the controller does not affect the normal use for a short time, if the short circuit lasts for a long time, it will cause the components to age or be damaged, thereby causing the controller to function abnormally, resulting in the compressor being unable to operate, and if it flows to the customer application end, it will cause certain loss to the customer's property. Moreover, for the delivered equipment, rework is needed, and more losses such as re-delivery of cotton bolls are needed. CONTENT OF THE INVENTION
[0005] The application aims to provide a low-voltage terminal tin connection detection device and a heavy-load FCT test tool, which are used to solve the technical problem that the heavy-load test in the prior art cannot detect whether the low-voltage terminals of the controller have tin connection, which causes the components to age or be damaged.
[0006] To achieve the above-mentioned purpose and other related purposes, the first aspect of the application provides a low-voltage terminal tin connection detection device. The low-voltage terminal tin connection detection device comprises a power supply module, an interface module and a test module. The power supply module is connected to the test module. One end of the interface module is connected to the low-voltage terminals of the to-be-detected equipment, and the other end is connected to the test module. The test module judges whether there is tin connection based on the resistance between the low-voltage terminals of the to-be-detected equipment.
[0007] In some embodiments of the first aspect of the present application, the test module comprises a relay board, a resistance detection unit; the relay board comprises a first relay connection area and a second relay connection area; the low-voltage terminals are respectively connected to the normally open points of a relay output of the first relay connection area and a relay output of the second relay connection area; the common points of the relay outputs of the first relay connection area connected with the low-voltage terminals are all connected to the signal input end of the resistance detection unit, and the common points of the relay outputs of the second relay connection area connected with the low-voltage terminals are all connected to the common end of the resistance detection unit.
[0008] In some embodiments of the first aspect of the present application, the low-voltage terminals are at least two, and the at least two low-voltage terminals are connected to different relay outputs of the first relay connection area and different relay outputs of the second relay connection area.
[0009] In some embodiments of the first aspect of the present application, the relay board is a 32-way relay board.
[0010] In some embodiments of the first aspect of the present application, the resistance detection unit adopts a digital multimeter.
[0011] In some embodiments of the first aspect of the present application, the interface module adopts an aviation plug, and the low-voltage terminals of the device to be detected are connected to the test module through the aviation plug.
[0012] In some embodiments of the first aspect of the present application, the power module adopts a 24V switching power supply to provide power for the test module.
[0013] To achieve the above object and other related objects, the second aspect of the present application provides a heavy-load FCT test tool. The heavy-load FCT test tool comprises a direct-current power supply, a device to be detected, and the low-voltage terminal connection and tin detection device of any one of the first aspect of the present application; the direct-current power supply is connected with the power module of the low-voltage terminal connection and tin detection device and the device to be detected; the low-voltage terminal connection and tin detection device is also connected with the low-voltage terminals of the device to be detected.
[0014] In some embodiments of the second aspect of the present application, the heavy-load FCT test tool further comprises a control end; the control end is in communication connection with the low-voltage terminal connection and tin detection device, so that the low-voltage terminal connection and tin detection device performs low-voltage terminal connection and tin detection based on the control signal output by the control end.
[0015] In some embodiments of the second aspect of the present application, the communication mode between the control end and the low-voltage terminal connection and tin detection device is LAN communication.
[0016] As described above, the low-voltage terminal solder bridging detection device and heavy-duty FCT test fixture described in this application have the following beneficial effects:
[0017] The low-voltage terminal solder bridging detection device of this application connects the low-voltage terminals of the device under test to the test module through a set interface module, and judges solder bridging by detecting the resistance between each low-voltage terminal and other low-voltage terminals. This avoids the accelerated aging or damage of components caused by long-term short circuits during the use of the device under test due to the presence of low-voltage terminal solder bridging, and avoids the malfunction of the control board caused by low-voltage terminal solder bridging, which may lead to the compressor failing to operate. This improves the reliability and stability of the equipment shipment. Attached Figure Description
[0018] Figure 1 The diagram shown is a structural schematic of the low-voltage terminal solder bridging detection device described in an embodiment of this application.
[0019] Figure 2 The diagram shown is a structural schematic of the test module described in an embodiment of this application.
[0020] Figure 3 The diagram shown is a structural schematic of the relay board described in an embodiment of this application.
[0021] Figure 4 The diagram shown is a connection schematic of the low-voltage terminal solder bridging detection device described in an embodiment of this application.
[0022] Figure 5 The diagram shown is a structural schematic of the heavy-duty FCT test fixture described in an embodiment of this application.
[0023] Component designation explanation
[0024] 1000 Heavy-Duty FCT Test Fixture
[0025] 100 Low-voltage terminal solder bridging detection device
[0026] 110 Power Module
[0027] 120 Interface Module
[0028] 130 Test Module
[0029] 131 Relay board
[0030] 1311 First Relay Connection Area
[0031] 1312 Second Relay Connection Area
[0032] 132 Resistance Detection Unit
[0033] 310 Low-voltage terminal
[0034] 200 DC power supply
[0035] 300 devices to be tested
[0036] 400 control terminal Detailed Implementation
[0037] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.
[0038] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0039] In the embodiments of this application, terms such as "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. For example, the first relay connection area and the second relay connection area are merely used to distinguish different relay outputs located on the same relay board, and do not limit their order. Those skilled in the art will understand that terms such as "first" and "second" do not limit the quantity or execution order, and that terms such as "first" and "second" do not necessarily imply that they are different.
[0040] The following embodiments of this application provide a low-voltage terminal solder bridging detection device and a heavy-duty FCT test fixture. Before performing phase sequence testing on the device under test, the low-voltage terminals of the device under test are connected to an interface device and then connected to a test device. By detecting the resistance between each low-voltage terminal and other low-voltage terminals one by one, it is determined whether there is solder bridging between the low-voltage terminals. This solves the technical problem in the prior art that heavy-duty testing cannot detect whether there is solder bridging on the low-voltage terminals of the controller, which leads to accelerated aging or damage of components.
[0041] The following will describe in detail, with reference to the accompanying drawings, the principle and implementation method of a low-voltage terminal solder bridging detection device and a heavy-duty FCT test fixture according to this embodiment, so that those skilled in the art can understand the low-voltage terminal solder bridging detection device and the heavy-duty FCT test fixture according to this embodiment without creative effort.
[0042] Please see Figure 1 The image shown is a schematic diagram of the low-voltage terminal solder bridging detection device described in an embodiment of this application. Figure 1 As shown, the low-voltage terminal solder bridging detection device 100 includes: a power module 110, an interface module 120, and a test module 130.
[0043] Specifically, the power module 110 is connected to the test module 130 to provide power to the test module 130. One end of the interface module 120 is connected to the low-voltage terminal 310 of the device under test 300, and the other end is connected to the test module 130. The test module 130 determines whether there is solder bridging based on the resistance between the low-voltage terminals 310 of the device under test 300.
[0044] For example, the low-voltage terminal 310 is connected to the test module 130 via the interface module 120. The test module 130 sequentially measures the resistance between each low-voltage terminal 310 and all other low-voltage terminals 310. If the resistance between each low-voltage terminal 310 and all other low-voltage terminals 310 is ≥99999Ω, then there is no solder bridging between the low-voltage terminals 310. Conversely, based on the resistance between each low-voltage terminal 310 and other low-voltage terminals 310, the low-voltage terminals 310 exhibiting solder bridging can be identified. The low-voltage terminal solder bridging detection device 100 of this application can perform solder bridging detection on the low-voltage terminals of equipment to be tested before shipment, improving the reliability and stability of equipment shipment.
[0045] Please see Figure 2 The diagram shows a structural schematic of the test module described in an embodiment of this application. Figure 2 As shown, the test module 130 includes: a relay board 131 and a resistance detection unit 132.
[0046] Specifically, the relay board 131 includes: a first relay connection area 1311 and a second relay connection area 1312; the low-voltage terminal 310 is respectively connected to a normally open contact of a relay output of the first relay connection area 1311 and a normally open contact of a relay output of the second relay connection area 1312.
[0047] The common point of the relay output of the first relay connection area 1311 connected to the low-voltage terminal 310 is connected to the signal input terminal of the resistance detection unit 132, and the common point of the relay output of the second relay connection area 1312 connected to the low-voltage terminal 310 is connected to the common terminal of the resistance detection unit 132.
[0048] For example, there are at least two low-voltage terminals 310, and at least two of the low-voltage terminals 310 are connected to different relay outputs of the first relay connection area 1311 and different relay outputs of the second relay connection area 1312.
[0049] In one embodiment, the relay board 131 is a 32-channel relay board, and the device under test 300 has nine low-voltage terminals 310, including: pins 1 to 8 (low-voltage terminals) and pin 9 (outer casing point); as Figure 3 As shown, the 32-channel relay board includes 32 relay outputs and one power interface.
[0050] One power interface is connected to the power module to receive power from the power module. The first nine relay outputs, numbered 1-9, are designated as the first relay connection area 1311, and the nine relay outputs, numbered 10-18, are designated as the second relay connection area 1312. Each relay output includes a normally open contact, a normally closed contact, and a common contact.
[0051] It should be noted that the first relay connection area 1311 can also be any 9 relay outputs from the 32 relay outputs, and the second relay connection area 1312 can also be any 9 relay outputs from the 32 relay outputs excluding the 9 relay outputs from the first relay connection area 1311. The specific settings are not described here.
[0052] It should be noted that the number of low-voltage terminals 310 described in the above embodiments is not a fixed number, but is determined by the actual number of low-voltage terminals 310 included in the device under test 300 and required to be tested. Furthermore, the first relay connection area 1311 and the second relay connection area 1312 described in the above embodiments are divided according to the actual situation.
[0053] Please see Figure 4 The diagram shows a connection schematic of the low-voltage terminal solder bridging detection device described in this application embodiment. The device under test 300 has nine low-voltage terminals 310, including PIN1 to PIN8 (low-voltage terminals) and PIN9 (outer casing point).
[0054] like Figure 4As shown, the low-voltage terminal 310 of the device under test 300 is connected to the interface module 120. Through the interface module 120, the low-voltage terminal 310 (PIN1 to PIN9) is connected to the normally open contacts of the relay outputs (OUT1 to OUT9) of the first relay connection area 1311 and the normally open contacts of the relay outputs (OUT10 to OUT18) of the second relay connection area 1312 of the relay board 131. The common contact of the relay outputs (OUT1 to OUT9) of the first relay connection area 1311 is connected to the signal input terminal of the resistance detection unit 132. The common contact of the relay outputs (OUT10 to OUT18) of the second relay connection area 1312 is connected to the common terminal of the resistance detection unit 132. The power module 110 is connected to the power interface of the relay board 131.
[0055] In this embodiment, the resistance detection unit 132 is a digital multimeter. The common contact of the relay outputs (OUT1 to OUT9) of the first relay connection area 1311 is connected to the INPUT terminal of the digital multimeter, and the common contact of the relay outputs (OUT10 to OUT18) of the second relay connection area 1312 is connected to the COM terminal of the digital multimeter. The interface module 120 uses an aviation connector, and the low-voltage terminals 310 (PIN1 to PIN9) of the device under test 300 are connected to the connection terminals (1-9) of the aviation connector in sequence. The power module 110 uses a 24V switching power supply, which is connected to the power interface of the relay board 131.
[0056] It should be noted that an aviation plug is a specially designed electrical connector, mainly used to connect power or signals, and is widely used, especially in wire harnesses with a large number of cores. Aviation plugs are generally made of brass, but in cases where extremely high number of insertions and removals and a long lifespan are required, materials such as phosphor bronze and beryllium copper may also be used. The outer shell of an aviation plug is usually made of metal materials, such as zinc alloy, to ensure the strength and durability of the connection.
[0057] In this embodiment, when testing whether there is solder bridging between the low-voltage terminal 310 corresponding to PIN1 and other low-voltage terminals 310: turn on the resistance test mode of the digital multimeter, and turn on the relay output (OUT1) of the first relay connection area 1311 and the relay output (OUT11~OUT18) of the second relay connection area 1312. Test the resistance between PIN1 and PIN2~PIN9 using the digital multimeter. If the resistance is ≥99999Ω, it is determined that there is no solder bridging; otherwise, there is solder bridging.
[0058] The method for testing whether there is solder bridging between the low-voltage terminals 310 corresponding to PIN2 to PIN9 and other low-voltage terminals 310 is the same as described above, so it will not be repeated here.
[0059] Please see Figure 5 The image shown is a structural schematic diagram of the heavy-duty FCT test fixture described in an embodiment of this application. Figure 5 As shown, the heavy-duty FCT test fixture 1000 includes: a DC power supply 200, a device under test 300, and a low-voltage terminal solder bridging detection device 100 as described in any of the above embodiments of this application.
[0060] Specifically, the DC power supply 200 is connected to the power module 110 of the device under test 200 and the low-voltage terminal solder bridging detection device 100, and the low-voltage terminal solder bridging detection device 100 is also connected to the low-voltage terminal of the device under test 300.
[0061] In one embodiment, such as Figure 5 As shown, the heavy-duty FCT test fixture 1000 also includes a control terminal 400, which is communicatively connected to the low-voltage terminal solder bridging detection device 100 so that the low-voltage terminal solder bridging detection device 100 performs low-voltage terminal solder bridging detection based on the control signal output by the control terminal.
[0062] In one embodiment, the communication method between the control terminal 400 and the low-voltage terminal solder joint detection device is LAN communication.
[0063] It should be noted that, in the embodiments of this application, the words "exemplary" or "for example" indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.
[0064] In summary, this application provides a low-voltage terminal solder bridging detection device and a heavy-duty FCT testing fixture. The low-voltage terminal solder bridging detection device of this application connects the low-voltage terminals of the device under test to the testing module through a set interface module, and determines solder bridging by detecting the resistance between each low-voltage terminal and other low-voltage terminals. This avoids the accelerated aging or damage of components caused by prolonged short circuits during the use of the device under test due to low-voltage terminal solder bridging, and also avoids the malfunction of the control board caused by low-voltage terminal solder bridging, which could lead to compressor failure. This improves the reliability and stability of the equipment upon shipment. Therefore, this application effectively overcomes the various shortcomings of the prior art and has high industrial application value.
[0065] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.
[0066] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.
Claims
1. A low-voltage terminal soldering detection device, characterized by, The device comprises a power module, an interface module and a test module; The power module is connected to the test module; One end of the interface module is connected to low-voltage terminals of a device to be detected, and the other end is connected to the test module; The test module determines whether there is tin connection based on the resistance between the low-voltage terminals of the device to be detected.
2. The low-voltage terminal connection detection apparatus according to claim 1, characterized by The test module comprises a relay board and a resistance detection unit; The relay board comprises a first relay connection area and a second relay connection area; the low-voltage terminals are respectively connected to the normally open point of a relay output of the first relay connection area and the normally open point of a relay output of the second relay connection area; The common points of the relay outputs of the first relay connection area connected to the low-voltage terminals are connected to the signal input end of the resistance detection unit, and the common points of the relay outputs of the second relay connection area connected to the low-voltage terminals are connected to the common end of the resistance detection unit.
3. The low-voltage terminal connection detection apparatus according to claim 2, characterized in that, The low-voltage terminals are at least two, and at least two low-voltage terminals are connected to different relay outputs of the first relay connection area and different relay outputs of the second relay connection area.
4. The low-voltage terminal connection detection apparatus according to claim 2, characterized by The relay board is a 32-way relay board.
5. The low-voltage terminal connection detection apparatus according to claim 2, characterized by The resistance detection unit adopts a digital multimeter.
6. The low voltage terminal connection detection apparatus of claim 1, wherein The interface module adopts an aviation plug, and the low-voltage terminals of the device to be detected are connected to the test module through the aviation plug.
7. The low-voltage terminal connection inspection apparatus according to claim 1, characterized by The power module adopts a 24V switching power supply to provide power for the test module.
8. A heavy load FCT test fixture characterized by, The heavy-load FCT test tool comprises a direct-current power supply, a device to be detected and the low-voltage terminal tin connection detection device according to any one of claims 1 to 7; The direct-current power supply is connected to the power module of the low-voltage terminal tin connection detection device and the device to be detected; The low-voltage terminal tin connection detection device is also connected to the low-voltage terminals of the device to be detected.
9. The heavy load FCT test fixture of claim 8, wherein, The heavy-load FCT test tool further comprises a control end; the control end is in communication connection with the low-voltage terminal tin connection detection device, so that the low-voltage terminal tin connection detection device performs low-voltage terminal tin connection detection based on the control signal output by the control end.
10. The heavy load FCT test fixture of claim 9, wherein, The communication mode between the control end and the low-voltage terminal tin connection detection device is LAN communication.