TWI763291B - Test fixture and test assembly line - Google Patents

Abstract

The application provides a test fixture and a test assembly line. The test fixture includes: a UPS power supply including an input terminal and an output terminal; a first interface coupled to the input terminal of the UPS power supply, for coupling with an external power source; a second interface for connecting to an electronic product; and a first switch module including a first end and a second end, the first end of the first switch module is coupled to the output end of the UPS power supply. The second end of the first switch module is connected in parallel with a lead-out line of the first interface to form a combined output coupled to the second interface. The power supply of the product is controlled through the automatic power-on and power-off function, which solves the power-off demand of shutdown and restart between different stations of the test assembly line, and can save repeated power-on time and solve the problem of inability to communicate under the automatic standby mode of the product.

Description

Test fixtures and test pipelines

The present invention relates to the technical field of testing, in particular, to a testing fixture and a testing assembly line.

During the flow of electronic products between different test procedures on the test line, different test stations often have different power supply requirements. In the manufacturing process of electronic products, it is often necessary to perform multiple tests on electronic products according to the product design function. In pipelined production, these multiple tests are scheduled to be executed at different test stations in the pipeline. However, in the production of assembly line automation, it is difficult to realize live current flow, and it is often necessary to unplug the connected power cord and possible data line when leaving a test station, and need to re-plug the power cord and the power cord when arriving at the next test station. There may be data lines, which greatly affects the test efficiency.

In the prior art, an uninterruptible power supply (UPS) power supply is used to solve the above problems, but the capacity of the UPS power supply is limited. After a certain power supply time, the operator needs to disassemble and replace the UPS power supply, and charge the replaced UPS power supply offline. inconvenient.

In addition, the on/off test is also a basic test content of electronic products. When the electronic products in the assembly line are faulty, a suitable restart method is also required to ensure the smooth flow of the entire test assembly line. Furthermore, some products have not been operated for a period of time Or when there is no signal source input, it will enter the standby mode; after entering the standby mode, the normal interactive mode (such as remote control signal, signal source access, etc.) cannot be woken up to enter the test.

In order to solve the above problems, the present application provides a test fixture, which can realize automatic production testing with uninterrupted power supply in the test line, and can also control the power supply of products by automatically powering on and off based on requirements.

According to an aspect of the present invention, a test fixture is provided, comprising: a UPS power supply, including an input end and an output end; a first interface, coupled to the input end of the UPS power supply, for coupling with an external power supply; Two interfaces for coupling with electronic products; and a first switch module, including a first end and a second end, the first end of the first switch module is coupled to the output end of the UPS power supply , the combined output formed by the parallel connection between the second end of the first switch module and the lead-out line of the first interface is coupled to the second interface.

According to an aspect of the present invention, a test assembly line is proposed, comprising: an assembly line; the above-mentioned test fixture connected to the assembly line; and a bearing module connected to the test fixture for supporting electronic products and all The test fixture moves in the assembly line.

In order to have a better understanding of the above-mentioned and other aspects of the present invention, the following specific examples are given and described in detail in conjunction with the accompanying drawings as follows:

1000: Test fixture

101: The first interface

102: Second interface

110:UPS power supply

111: Input terminal

112: output terminal

121: The first switch module

122: The second switch module

1211: First End

1212: Second end

130: timing conduction module

140: Transformer module

150: One-way conduction module

151: The first one-way conduction module

152: The second one-way conduction module

160: Combined output

201: The first switch control module

202: The second switch control module

Figure 1 shows a block diagram of a test fixture according to an exemplary embodiment of the present application; Figure 2 shows a circuit diagram of a test fixture according to an example embodiment of the present application.

The test fixture provided by the application controls the power supply of the product through the automatic power-on and power-off function, which solves the power-off requirement of shutdown and restart between different stations of the test pipeline, and can save the repeated boot time and the problem of inability to communicate in the automatic standby state of the product. . In addition, the structure of the test fixture is simple, and the existing test assembly line can be simply modified without modifying the power supply of the assembly line, which can save costs. The test fixture follows the product to flow on the assembly line, there is no problem of exposed high-voltage collectors, and the safety is high.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those with ordinary knowledge in the art without creative work shall fall within the protection scope of the present application.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical solutions of the present application may be practiced without one or more of the specific details, or other methods, components (components), devices, steps, etc. may be employed. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the present application.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Thus, a first element discussed below could be termed a second element without bias from the teachings of the concepts of the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Those skilled in the art will appreciate that the drawings are merely schematic representations of example embodiments and may not be to scale. The modules or processes in the drawings are not necessarily necessary to implement the present application, and therefore cannot be used to limit the protection scope of the present application.

The inventors found that electronic products have different demands on timing of power supply during testing between different sites of a testing pipeline. For example, electronic products at some sites need to be shut down and turned back on to be tested. Therefore, it is necessary to shut down and restart the product at the site. This operation often needs to be performed manually by the operator, which prolongs the test time of the site, and even affects the work rhythm of the entire test pipeline in severe cases. In addition, there are also electronic products that enter the standby state due to inactivity for a long time in the process of waiting for the test. The test equipment cannot be used to directly wake up the test, and the restart can only be realized by manually operating the switch button of the electronic product or even plugging and unplugging the power cord. Then test normally.

In view of the power-off and restart requirement of electronic products during the above-mentioned test process, the present application aims to provide a test fixture that can realize uninterrupted power supply and test in the test line, thereby saving the time-consuming of electronic products in the test station and improving the whole test The automation level and work efficiency of the assembly line.

The technical solutions of the present application will be described in detail below with reference to the accompanying drawings.

Figure 1 shows a block diagram of a test fixture according to an exemplary embodiment of the present application; Figure 2 shows a circuit diagram of a test fixture according to an example embodiment of the present application.

According to an exemplary embodiment of the present application, the present application provides a test fixture 1000 , as shown in FIG. 1 and FIG. 2 . The test fixture 1000 includes a UPS power supply 110, The first interface 101 , the second interface 102 and the first switch module 121 . The test fixture 1000 can flow in the test assembly line along with the electronic product. In an embodiment of the present application, the test fixture 1000 may further include a carrying module (not shown in the figure) for carrying electronic products. Carrier modules can flow in the test pipeline. In another embodiment of the present application, the test fixture 1000 and the electronic product can also be jointly carried by the same carrier module, so as to flow in the assembly line together, which is not limited in the present application.

The UPS power supply 110 includes an input terminal 111 and an output terminal 112 . The first interface 101 is coupled to the input end 111 of the UPS power source 110 for coupling with an external power source. The first interface 101, that is, a fixture power supply interface, is used to directly supply online power to electronic products and/or charge the UPS power supply 110 through an external power supply. The coupling timing of the first interface 101 and the external power source may be each test station in the test production line. When the electronic product flows to a test station, it stops and is tested. The first interface 101 of the test fixture 1000 is connected to the opposite interface at the test station, and the external power supply at the test station can be automatically connected to the test station by the automatic plug-in fixture. It is electrically coupled to the first interface 101 . In this way, the automatic power supply to the electronic product and the charging of the UPS power supply 110 can be realized without the operator's plugging and unplugging operation.

The second interface 102, that is, a product power supply interface, is used for coupling with an electronic product, and can implement power supply to the electronic product. When the electronic product is in the assembly line, the power supply interface of the electronic product can be continuously connected with the second interface 102 of the corresponding test fixture 1000 only by the cable. In a preferred embodiment, when the electronic product has a wired signal interface and needs to be tested, the signal source from the test station can also be accessed through the same automatic plugging fixture or different automatic plugging fixtures. And connected to the electronic product from an interface. signal source access The interface of the first interface 101 can be implemented by the same hardware interface, or it can be implemented by multiple hardware interfaces. The interface for connecting the signal source to the electronic product may be implemented by the same hardware interface as the second interface 102, or may be implemented by multiple hardware interfaces, and the present application is not limited to this.

The first switch module 121 is connected in series between the UPS power supply 110 and the second interface 102 , and is used for selectively providing the electrical energy of the UPS power supply 110 to the electronic product through the second interface 102 .

In the exemplary embodiment of the present application, the first switch module 121 includes a first end 1211 and a second end 1212 . The first end 1211 of the first switch module 121 is coupled to the output end of the UPS power supply 110 . The second end 1212 of the first switch module 121 is connected in parallel with the lead-out line of the first interface 101 to form a combined output 160 , which is then coupled to the second interface 102 . The manner of coupling includes direct connection and/or indirect connection. For example, some functional modules may be connected in series between two indirectly connected modules, so as to filter, transform, stabilize, and delay the passing current and voltage, which is not limited in this application. In the exemplary embodiment of the present application, whether to supply power to the electronic product connected to the second interface 102 through the UPS power supply 110 can be selected by controlling the opening or closing of the first switch module 121 .

In the exemplary embodiment of the present application, the test fixture 1000 further includes a first switch control module 201 , which is coupled to the first switch module 121 and used to control the on and off of the first switch module 121 . The first switch control module 201 can generate a trigger signal to the first switch module 121 based on the change of the internal signal of the test fixture 1000 or the change of the signal of the external test station. The first switch control module 201 can be a mechanical switch, such as a micro switch, or can be coupled to an external controller through a control interface. The signal sent by the external controller controls the opening or closing of the first switch module 121 through the first switch control module 201 . combine. The external controller can be a PLC controller, a microcontroller, a PC, and the like. The ways of coupling include, but are not limited to, mechanical interference, electromagnetic force, wired communication, wireless communication, and the like. In the exemplary embodiment of the present application, the first switch control module 201 can be disposed at the first interface 101 for automatic plugging and unplugging, and triggers when the first interface 101 has not been completely electrically separated from the external power supply at the test station. The first switch module 121 is activated, and the UPS power supply 110 continues to supply power when the external power supply has not stopped supplying power, so as to ensure that when the electronic product leaves the current testing station together with the test fixture 1000, the electronic product still maintains a continuous power supply and startup working state. In another embodiment, when the test station (such as a computer) completes the test on the current product, a signal is sent through the first switch control module 201 to trigger the first switch module 121 in the test fixture 1000 to act, and the external power supply has not stopped When supplying power, the UPS power supply 110 continues to supply power, so as to ensure that when the electronic product leaves the current test station together with the test fixture 1000, the electronic product still maintains a continuous power supply and working state.

According to some embodiments of the present application, as shown in FIG. 1 , the test fixture 1000 may further include a timing conduction module 130 . The timing conduction module 130 is connected in series between the second end 1212 of the first switch module 121 and the combined output 160 . The timing-on module 130 remains off when the power is normally turned on. When the first switch module 121 is turned off (power off) and then turned on (on) again, the timing conduction module 130 turns on the power supply connected before it and the circuit connected after it within a preset time, and after the preset time is exceeded disconnect. In this way, before disconnecting the electrical connection between the first interface 101 and the external power supply, after triggering the disconnection and re-conduction of the first switch module 121, the UPS power supply 110 supplies power to the product in time, which can ensure that the external power supply is disconnected and the current When the test station is installed, the electronic product remains powered on.

When the electronic product follows the test fixture 1000 to the next test station, the first interface 101 is automatically connected to the external power supply of the test station. If the timing conduction module 130 has not completed timing and is powered off at this time, the electronic product realizes uninterrupted power supply, and new test items can be directly performed. That is to say, after the electronic product is reconnected to the external power supply, there is no need for the operator to disconnect the UPS power supply 110 , and the timing conduction module 130 completes the timing and then powers off. In this way, an interlock mode is formed between the test fixture 1000 and the test station, and the test fixture 1000 and the test station realize uninterrupted continuous power supply to the electronic product.

In the exemplary embodiment of the present application, the preset time of the timing conduction module 130 may be based on the product testing time interval between the current test station to be tested and the adjacent tested test stations, or may be based on two adjacent test stations. It can be set by the product testing time interval between the test stations, or according to the length of time that the product enters the standby mode without operation. The product testing time interval may be an average time interval or a maximum time interval. By timing the preset time of the turn-on module 130 , the operation of automatically stopping the power supply of the UPS power supply 110 can be realized, and the average energy consumption and the total energy consumption of the UPS power supply 110 during the test flow can be reduced.

According to other embodiments of the present application, the first switch module 121 can also be triggered to be turned on and off based on the change of the internal signal of the test fixture 1000 or the change of the external signal of the test fixture 1000 . For example, it is detected whether there is a non-zero voltage or current in the second interface 102 . When the voltage or current at the second interface 102 is zero, the electronic product is in a power-off state, and the first switch module 121 is triggered to be turned off and turned on again. The electronic product coupled to the second interface 102 is powered off and shut down due to the disconnection of the first switch module 121, and then automatically restarted due to re-powering, or cooperates with triggering an external controller to realize automatic switching of the electronic product. to start the operation. Alternatively, it can also be detected whether there is a non-zero voltage or current in the first interface 101 . When the voltage or current at the first interface 101 is zero, the external power supply is not connected, and when the UPS power supply 110 and the second interface 102 are disconnected, the electronic product is in a power-off state, triggering the first switch mode The group 121 is disconnected and turned on again, the electronic product coupled to the second interface 102 is powered off and shut down due to the disconnection of the first switch module 121, and then automatically restarted due to re-powering, or cooperates with the external controller. Trigger to realize automatic start-up operation of electronic products.

In the exemplary embodiment of the present application, after the first switch module 121 is triggered to be turned off and turned on again, the timing conduction module 130 is triggered to re-time and power on for a preset time. The electronic product coupled to the second interface 102 is When the switch module 121 is disconnected, the power is turned off, and then it is restarted due to regaining the power supply, or the electronic product can be automatically started and started by triggering an external controller. The final electronic product is always in a working state, and can be used at any time. Perform a test operation. In the exemplary embodiment of the present application, the preset time of the timing conduction module 130 can be set according to the length of time during which the electronic product enters the standby mode without operation, so as to keep the product in a working state after restarting. The first switch module 121 can also be triggered multiple times based on the completion of the timing of the timing conduction module 130 and the connection of the external power supply, so as to ensure that when there is no external power supply, the power is turned off and restarted after the timing is completed, and the product is always restarted. keep working.

In the exemplary embodiment of the present application, the test fixture 1000 further includes a transformer module 140 , and the transformer module 140 is connected in series between the combined output 160 and the second interface 102 . The power supply voltage of the external power supply or the UPS power supply 110 can be converted into the input voltage required by the electronic product through the transformer module 140 . As a result, the test fixture 1000 can be applied to more models and In-line test power supply for products of the category. In other embodiments, the transformer module 140 may also have a function of voltage regulation at the same time, so as to filter the impact generated during switching or switching of the coupled external power supply and the UPS power supply.

In the exemplary embodiment of the present application, the test fixture 1000 may further include a one-way conduction module 150 , which includes a first one-way conduction module 151 and a second one-way conduction module 152 . The first one-way conduction module 151 is connected in series between the first interface 101 and the combined output 160 , and the second one-way conduction module 152 is connected in series between the output end of the UPS power supply 110 and the combined output 160 . In some embodiments of the present application, when the test fixture 1000 includes the transformer module 140, the first one-way conduction module 151 is connected in series between the combined output 160 and the transformer module 140, and the second one-way conduction module 151 The conducting module 152 is connected in series between the combined output 160 and the transformer module 140 . In some embodiments of the present application, when the test fixture 1000 includes the timing conduction module 130 and the transformer module 140, the second one-way conduction module 152 is connected in series with the timing conduction module 130 and the transformer module between 140. That is, the output end of the first one-way conduction module 151 and the output end of the second one-way conduction module 152 are coupled in parallel before the transformer module 140 . The unidirectional conduction module 150 can ensure that there is no reverse current flow. Specifically, the current output from the output end of the UPS power supply 110 will not flow reversely to the input end of the UPS power supply 110 and the first interface 101 due to the action of the first one-way conduction module 151 , resulting in abnormal current leakage. The power supply current of the external power source connected to the first interface 101 is before the first switch module 121, and due to the action of the second one-way conduction module 152, it will not flow reversely to the output end of the UPS power supply, resulting in the UPS power supply. Abnormal and affect the power supply efficiency of electronic products. According to some embodiments of the present application, the first one-way conduction module 151 and the second one-way conduction module 152 may be a diode, but the present application is not limited thereto. The first one-way conduction module 151 and the second one-way conduction module 152 may be integrated into the same electronic component, or may be set up separately.

In some embodiments of the present application, the test fixture 1000 may further include a second switch module 122 . The second switch module 122 is connected in series between the output end of the UPS and the combined output 160 of the first interface 101 and the second interface 102 . That is, the first end of the second switch module 122 is coupled to the output end of the UPS power supply 110 and the first interface 101 . The second end of the second switch module 122 is coupled to the second interface 102 . The second switch module 122 can control the entire test fixture 1000 to be the power supply path of the second interface 102 , that is, the electronic product. When the second switch module 122 is open, the electronic product cannot obtain any power supply from the test fixture 1000 . The manner of series coupling includes direct connection and/or indirect connection, which will not be repeated here. In the embodiment of the present application, by controlling the disconnection and reconnection of the second switch module 122, the power-off and re-power supply of the electronic product can be realized, so as to restart the electronic product and enter the working mode, and realize the re-use of the interactive test. can. Avoid some electronic products from entering the standby state or other abnormal state when the test station continues to supply power, and cannot be controlled by an external control signal, nor can the first switch module 121 switch on and off the UPS power supply 110 to realize the electronic products. power off and restart.

According to an example embodiment of the present application, the test fixture 1000 may further include a second switch control module 202 . The second switch control module 202 is coupled to the second switch module 122, and the second switch control module 202 is coupled to an external controller through a second control interface (not shown in the figure), and the signal sent by the external controller The on and off of the second switch module 122 is controlled, and the automatic restart of the electronic product is realized through the external controller. The external controller can be a PLC controller, a microcontroller, a PC, and the like. For example, a test PC at a test station The control sends out a test command (such as an infrared remote control signal), and when the detection camera of the test PC senses that the screen of the electronic product has not changed, it sends a restart signal to the second switch control module 202 . The second switch control module 202 performs the operation of disconnecting and then re-connecting the second switch module 122, the electronic product is forced to shut down due to the power supply being cut off, and automatically restarts when the power supply is re-supplied. At this time, the test PC sends a test command (such as an infrared remote control signal) again, and the detection camera of the test PC senses that the display screen of the electronic product (such as a monitor and a projector) has changed, and continues the subsequent test. The coupling method between the second switch module 122 , the second switch control module 202 and the external controller, and the coupling method between the first switch module 121 , the first switch control module 201 and the external controller similar, and will not be repeated here.

According to some embodiments of the present application, the test fixture 1000 may further include a carrying module (not shown in the figure), which is connected to the electronic product and used for carrying the electronic product to move in the assembly line.

According to the test fixture 1000 provided by the exemplary embodiment of the present application, the present application can further provide a test pipeline and a test method. The test assembly line includes: a test fixture 1000, an assembly line and a bearing module. The test fixture 1000 is connected to the assembly line. The carrying module is connected to the test fixture 1000, and is used for carrying electronic products and the test fixture moving in the test assembly line. The implementation process of the test method is as follows: during the normal test process of the product, the product is placed in a test station and is coupled with an external power supply through the first interface 101 (for example, the coupling can be realized by automatic plugging and unplugging fixtures), The product is powered by an external power supply, and the switch module does not change at this time. The external power supply passes through the first interface 101, the first switch module 121, the second switch module 122, The passage formed by the second interface 102 and other modules (eg, the transformer module 140 , etc.) supplies power to the product.

After the test of the current test station is completed, the UPS power supply 110 is activated via the first switch module 121, and the product leaves the current test station and flows to the next test station. When the product flows to the next test station and is connected to the external power supply provided by the next test station, and the timing of the timing conduction module 130 has not ended, the product is directly powered by the external power source, and the power supply of the UPS power supply 110 is Disconnects automatically after the timer expires.

When the product has not flowed to the next test station and is connected to the external power supply of the station, the timing of the timing on module 130 ends, the UPS power supply 110 will be disconnected, and the coupled product will be powered off. At this time, the second switch module 122 is triggered to turn off and on, and the timing conduction module 130 re-times and turns on the UPS power supply and the subsequent circuit, so that the product regains power and restarts (the restart can also be achieved with other control signals), This way the product can be put back into working condition. At this time, if the product reaches the next test station and is connected to the external power supply of the next test station, the product is still in working state, and the interactive test can be carried out at any time, so as to avoid the situation that the interactive test cannot be carried out after entering the standby mode. In addition, the first switch module 121 can be triggered multiple times based on the completion of the timing of the timing conduction module 130 and the connection of the external power supply, so as to ensure that when there is no external power supply, the power is turned off and restarted under the condition of completion of the timing. Keep the product in working mode, which can be interactively controlled.

When the test fixture follows the product into a test station and stands for testing, the UPS power supply in the test fixture can also be charged online through the first interface.

When the electronic product arrives at the test station to connect to the external power supply and needs to be restarted (for example, the electronic product is in a standby state or in failure, and cannot be automatically controlled by the test PC to wake up, In the prior art, the switch button on the electronic product can only be powered off and restarted) to trigger the second switch module 122 to be turned off and then on again. Therefore, the product is powered off and restarted to enter a working mode that can be tested interactively. A micro switch can be set as the second switch control module 202 to control the opening and closing of the second switch module 122 . After the test fixture is moved to the site, the second control interface (for example, PIN49 and PIN50 in the second figure) in the second switch control module 202 can automatically connect to the external controller of the site, such as controlling PC, through the second switch control module (eg MY4-24V in Figure 2) to perform power-off and restart according to the operation process of the site.

In this way, in the entire test pipeline, an interlock mode is formed between the test fixture and the test station, and the test fixture and the test station realize the continuous power supply of the electronic product without interruption. When the product needs to be restarted, the product can be easily powered off and re-powered by controlling the switch module on the test fixture, thereby realizing the restart. For products that enter the standby mode after a period of time, the test fixture of the present invention can also maintain the working mode when entering the next test station through the cooperation of the timing conduction module and the switch module, so that it is convenient to enter at any time. test.

In addition, in the test fixture and test assembly line provided by the present application, except for the wire of the wire package, other wiring adopts 1 square wire, and there is no problem of exposed high-voltage collectors, which can avoid unsafe factors. Moreover, the test fixture provided by the present application can be realized by simple modification on the existing test assembly line, and it does not need to spend a lot of cost to modify the power supply of the line body.

To sum up, although the present invention has been disclosed by the above embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains, without departing from the Various changes and modifications may be made within the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the appended patent application.

1000: Test fixture

101: The first interface

102: Second interface

110:UPS power supply

111: Input terminal

112: output terminal

121: The first switch module

122: The second switch module

1211: First End

1212: Second end

130: timing conduction module

140: Transformer module

150: One-way conduction module

151: The first one-way conduction module

152: The second one-way conduction module

160: Combined output

201: The first switch control module

202: The second switch control module

Claims (10)

A test fixture, comprising: a UPS power supply, including an input end and an output end; a first interface, coupled to the input end of the UPS power supply, for coupling with an external power supply; a second interface for connecting with electronic products are coupled; and a first switch module includes a first end and a second end, the first end of the first switch module is coupled to the output end of the UPS power supply, the first end A combined output formed after the second end of a switch module is connected in parallel with the lead lines of the first interface is coupled to the second interface. The test fixture according to claim 1, further comprising: a timing conduction module connected in series between the second end of the first switch module and the combined output. The test fixture according to claim 2, wherein when the first switch module is turned off and then turned on again, the timing conduction module is turned on within a preset time, and is turned off after the preset time is exceeded. The test fixture according to claim 3, wherein the setting basis of the preset time includes: the product testing time interval between the current test station to be tested and the adjacent tested test stations; The time interval between product testing between adjacent test stations; or the length of time that the product goes into standby mode with no operation. The test fixture according to claim 1, further comprising: a voltage transformer module connected in series between the combined output and the second interface. The test fixture according to claim 1, further comprising: a second switch module connected in series between the combined output and the second interface. The test fixture according to claim 1, further comprising: a first one-way conduction module, connected in series between the first interface and the combined output; a second one-way conduction module, connected in series between the output end of the UPS power supply and the combined output. The test fixture according to claim 6, further comprising: a first switch control module, coupled to the first switch module, for controlling the on-off of the first switch module; the first switch module A switch control module includes a micro switch, or the first switch control module is coupled to an external controller through a control interface; and/or a second switch control module is coupled to the second switch module, It is used to trigger the on-off of the second switch module; the second switch control module is coupled with an external controller through a control interface. The test fixture according to any one of claims 1 to 8, further comprising: a carrying module, connected to the electronic product, for carrying the electronic product to move in the assembly line. A test assembly line, comprising: an assembly line; the test fixture according to any one of claims 1-8, connected to the assembly line; and a bearing module, connected to the test fixture, for carrying electronic products and all The test fixture moves in the assembly line.

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