Parallel test switching device and equipment to be tested

Abstract

The invention provides a parallel test switching device and equipment to be tested, and relates to the technical field of equipment testing. The output end of the transmission element is connected with the signal switching module and the power distribution module; the output end of the signal switching module is connected with the power distribution module and the plurality of transmission elements; the transmission module transmits the received control data and the test signal to the signal switching module, and transmits the received first power supply to the power distribution module; the signal switching module sends a switching signal to the power distribution module based on the control data and sends the test signal to a target transmission element indicated by the control data, and the target transmission element is one or more of the plurality of transmission elements; the power distribution module responds to the switching signal and gates the power supply module connected with the target transmission element so as to transmit the first power supply to the target transmission element through the power supply module, the power distribution module comprises a plurality of power supply modules, each power supply module is connected with one transmission element, the power distribution module can be connected with test equipment in parallel, and the test efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of equipment testing, and in particular to a parallel test switching device and a device under test. Background Art

[0002] Modern aircraft typically integrate a large number of onboard devices, which may come from different suppliers. Testing these devices requires consideration of their compatibility and interoperability. Furthermore, due to the large number of devices, traditional serial testing is inefficient. This is particularly true for weapons and equipment used in high-intensity, high-ammunition consumption, and harsh environments, where preparing ammunition in a short period of time is challenging. The most significant obstacle is the lengthy ammunition testing process, which limits testing to one DUT at a time, resulting in low overall testing efficiency. Summary of the Invention

[0003] In view of this, the present application provides a parallel test switching device and a device under test, aiming to increase the number of objects under test per unit time and solve the problem of low test efficiency.

[0004] In a first aspect, the present application provides a parallel test switching device, comprising: a transmission module, a signal switching module, a power distribution module, and a plurality of transmission elements; the output end of the transmission element is connected to the signal switching module and the power distribution module, the output end of the signal switching module is connected to the power distribution module and the plurality of transmission elements; the output end of the power distribution module is connected to the plurality of transmission elements;

[0005] The transmission module is configured to transmit the received control data and test signal to the signal switching module, and transmit the received first power supply to the power distribution module;

[0006] The signal switching module is configured to send a switching signal to the power distribution module based on the control data, and send the test signal to a target transmission element indicated by the control data, wherein the target transmission element is one or more of the plurality of transmission elements;

[0007] The power distribution module is used to respond to the switching signal and select the power supply module connected to the target transmission element to transmit the first power supply to the target transmission element through the power supply module. The power distribution module includes multiple power supply modules, each of which is connected to a transmission element.

[0008] Optionally, the signal switching module is connected to the control end of the switch unit in the power module;

[0009] The power module is configured to transmit the first power supply to the transmission element connected to the power module when the switch unit in the power module is closed;

[0010] The signal switching module is used to send a switching signal to the power module in the power distribution module, and the switching signal includes a switch closing signal sent to the switch unit in the power module connected to the target transmission element, and a switch opening signal sent to the switch unit in the power module not connected to the target transmission element.

[0011] Optionally, the power supply module includes a switching circuit and multiple power branches; the first power supply includes alternating current and direct current, and the multiple power branches include a power branch for transmitting the alternating current and a power branch for transmitting the direct current;

[0012] The power supply branch is provided with a switch unit for controlling the power supply branch to be turned on or off;

[0013] The switching circuit includes a driver chip, an input end of the driver chip is connected to the signal switching module to obtain the switching signal, and an output end of the driver chip is connected to a control end of a switch unit in the power module.

[0014] Optionally, the transmission module includes a first connector and a second connector;

[0015] The first connector is used to transmit the test signal and the first power supply;

[0016] The second connector is used to transmit the control data, which includes a programmable network signal and a second power supply. The programmable network signal is used to indicate the target transmission element, and the second power supply is used to provide electrical energy for the signal switching module.

[0017] Optionally, the test signal includes a PCM code stream, a 1553B signal, or a switch signal;

[0018] The device further includes a linear coupler, wherein an input end of the linear coupler is used to receive the 1553B signal, and an output end of the linear coupler is used to connect to the multiple transmission elements.

[0019] Optionally, a mounting box is also included;

[0020] The signal switching module and the power distribution module are arranged in the installation box, and the first connector, the second connector and a plurality of transmission elements are arranged on the side wall of the installation box;

[0021] A plurality of channel indicator lights are provided on the first surface of the installation box, the plurality of channel indicator lights correspond one-to-one to the plurality of transmission elements, and the plurality of channel indicator lights are connected to the signal switching module;

[0022] The signal switching module is used to control the channel indicator light corresponding to the transmission element connected to the switch unit to light up when the switch unit is closed.

[0023] Optionally, the first surface is further provided with a self-test indicator light;

[0024] The signal switching module is used to control the self-test indicator light to light up when it is detected that the power supply and network of the device are normal.

[0025] Optionally, the first connector, the second connector and the transmission element are all aviation connectors.

[0026] Optionally, it also includes a power conversion circuit,

[0027] The input end of the power conversion circuit is connected to the second connector to obtain the second power supply;

[0028] The output end of the power conversion circuit is connected to the signal switching module, and is used to convert the voltage of the second power supply according to the driving voltage of the signal switching module.

[0029] In a second aspect, the present application also provides a testing device that adopts a parallel test switching device as described in any one of the above.

[0030] The present application provides a parallel test switching device and a device to be tested. The device includes a transmission module, a signal switching module, a power distribution module and a plurality of transmission elements; the output end of the transmission element is connected to the signal switching module and the power distribution module, the output end of the signal switching module is connected to the power distribution module and the plurality of transmission elements; the output end of the power distribution module is connected to the plurality of transmission elements; the transmission module is used to transmit the received control data and test signal to the signal switching module, and transmit the received first power supply to the power distribution module; the signal switching module is used to send a switching signal to the power distribution module based on the control data, and send the test signal to the target transmission element indicated by the control data, the target transmission element being one or more of the plurality of transmission elements; the power distribution module is used to select the power supply module connected to the target transmission element in response to the switching signal, so as to transmit the first power supply to the target transmission element through the power supply module, and the power distribution module includes a plurality of power supply modules, each of which is connected to a transmission element. Each of the above-mentioned multiple transmission elements can be externally connected to a device under test, and the signal switching module is used to control the sending of a test signal and a first power supply to the target transmission element in the multiple transmission elements, so as to test the device under test that is currently connected to the target test element. Among them, for the test signal, it can be directly switched through the signal switching module to send the test signal to the target transmission element, and for the first power supply, the present application configures a power distribution module, which includes a plurality of power modules connected to the transmission elements in a one-to-one correspondence. The signal switching module is used to control the selection of the power module connected to the target transmission element, and the first power supply is sent to the target transmission element through the selected power module. In this way, the device can be connected to multiple devices under test at the same time. Each time the target transmission element for transmitting the test signal and the first power supply is different, the corresponding device under test is also different. When testing different devices under test, there is no need to re-establish the connection of the physical cable, and the signal switching module can be used to switch directly, thereby improving the test efficiency. At the same time, the target transmission element can include multiple, and multiple devices under test can be tested in parallel, further improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the following briefly introduces the drawings required for use in the embodiment or the prior art description. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A schematic diagram of the structure of a parallel test switching device provided in an embodiment of the present application;

[0033] Figure 2 A schematic diagram of the specific structure of a parallel test switching device provided in an embodiment of the present application;

[0034] Figure 3 A schematic diagram of the external structure of an installation box provided in an embodiment of the present application.

[0035] Description of Reference Numerals

[0036] 1-Transmission element; 2-First connector; 3-Second connector; 4-Channel indicator light; 5-Self-test indicator light. DETAILED DESCRIPTION

[0037] Domestic missile ground testing equipment is set up according to the traditional "one missile, one station" testing equipment configuration mode. Multiple manufacturers produce various types of ammunition testing equipment. Every time a carrier aircraft adds a type of missile, corresponding testing equipment must be added. As a result, there are many types of test equipment for airborne missiles in service, which occupies a large area, requires a large number of maintenance personnel, and has a low utilization rate of testing equipment.

[0038] Currently, the parallel test switching host for the airborne 1188A standardization interface is primarily used when multiple rounds are unpacked from a box and remain in the box. Testing equipment connects to multiple airborne weapons through this parallel test switching host, enabling time-sharing testing. Currently, the interface circuits for this parallel test switching host are still designed using a combination of dedicated interface chips and peripheral components, making each interface independent and thus a key constraint on parallel testing.

[0039] The present application proposes a parallel test switching device and a device under test. Among them, the signal switching module sends a switching signal to the power distribution module based on the control data received from the transmission module, and sends the test signal to the target transmission element indicated by the control data, and the target transmission element is one or more of the multiple transmission elements; the power distribution module responds to the switching signal and selects the power supply module connected to the target transmission element to transmit the first power supply to the target transmission element through the power supply module. The power distribution module includes multiple power supply modules, each of which is connected to a transmission element. Based on this, each of the above-mentioned transmission elements can be externally connected to a device under test, and the signal switching module controls the sending of the test signal and the first power supply to the target transmission element among the multiple transmission elements to test the device under test connected to the target test element. In this way, the above-mentioned device includes multiple transmission elements, which can be connected to multiple devices under test in a one-to-one correspondence. The test signal transmitted each time is different from the target transmission element of the first power supply. There is no need to adopt the above-mentioned "one bomb and one station" detection equipment configuration mode. Multiple devices under test can be directly connected at the same time through this device, and the signal switching module is used to switch the received test signal and the first powered device under test to achieve parallel testing of multiple devices under test, thereby improving test efficiency.

[0040] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0041] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0042] Unless otherwise specified, the term "plurality" means two or more. In the disclosed embodiments, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B. The term "and / or" describes an association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] See also Figure 1 , Figure 1 A structural schematic diagram of a parallel test switching device provided in an embodiment of the present application, a parallel test switching device, comprising: a transmission module, a signal switching module, a power distribution module and multiple transmission elements; the output end of the transmission element is connected to the signal switching module and the power distribution module, the output end of the signal switching module is connected to the power distribution module and the multiple transmission elements; the output end of the power distribution module is connected to the multiple transmission elements.

[0045] The transmission module is used to transmit the received control data and test signal to the signal switching module, and transmit the received first power supply to the power distribution module.

[0046] The output end of each transmission element is connected to a device under test.

[0047] The above-mentioned transmission module is used to obtain the test signal and the first power supply sent to the device under test, and to obtain control data, so that the subsequent signal switching module can determine the target transmission element to which the test signal and the first signal transmitted by the transmission module need to be sent according to the control data. The target transmission element is one or more of the multiple transmission elements.

[0048] The signal switching module is configured to send a switching signal to the power distribution module based on the control data, and send the test signal to a target transmission element indicated by the control data, wherein the target transmission element is one or more of the plurality of transmission elements;

[0049] The signal switching module may include a microprocessor MCU, which may switch the link for transmitting the test signal and the first power supply according to control data, and the link includes a link for transmitting the test signal and a link for transmitting the first power supply.

[0050] Among them, for the link that transmits the test signal, specifically, the transmission module obtains the test signal, the signal switching module receives the test signal, and sends the test signal to the target test element according to the target transmission element indicated by the control data, and outputs it to the corresponding device under test through the target test element.

[0051] For the link that transmits the first power supply, it means that the power distribution module responds to the switching signal sent by the signal switching module, selects the power supply module connected to the target transmission element, so as to transmit the first power supply to the target transmission element through the power supply module, and thus transmits the first power supply to the corresponding device under test through the target transmission element.

[0052] The power distribution module includes a plurality of power modules, each of which is connected to a transmission element.

[0053] The switching signal may instruct the power supply module connected to the target transmission element in the device to be turned on, and transmit the first power received by the power distribution module to the device under test connected to the target transmission element.

[0054] The gating may be performed by selecting, from the power distribution module, the power module connected to the target transmission element and placing it in an on state, and the power modules not connected to the target transmission element and placing them in an off state. Therefore, the gating of the power module connected to the target transmission element may be performed by only placing the power module connected to the target transmission element in an on state, so as to transmit the received first power supply to the connected target transmission element via the power module.

[0055] Based on the above-mentioned device, the present application switches the target transmission element to which the test signal is sent and the power supply module selected in the control distribution module through the control of the signal switching module, thereby sending the test signal and the first power supply to the target transmission element, and then sending them to the device under test that needs to be tested. In this way, the device can connect to multiple devices under test at the same time. The target transmission element for transmitting the test signal and the first power supply is different each time, and the corresponding device under test is also different. When testing different devices under test, there is no need to re-establish the connection of the physical cable. The corresponding control data can be directly sent through the signal switching module to switch, thereby improving the test efficiency. At the same time, the target transmission element can include multiple, and multiple devices under test can be tested in parallel, further improving the test efficiency.

[0056] Based on the above embodiment, the specific structure of the present application for switching and controlling the power supply module in the power distribution module through the signal switching module can be:

[0057] The signal switching module is connected to the control end of the switch unit in the power module;

[0058] The power module is configured to transmit the first power supply to the transmission element connected to the power module when the switch unit in the power module is closed;

[0059] The signal switching module is used to send a switching signal to the power module in the power distribution module, and the switching signal includes a switch closing signal sent to the switch unit in the power module connected to the target transmission element, and a switch opening signal sent to the switch unit in the power module not connected to the target transmission element.

[0060] It can be understood that the above-mentioned switch closing signal indicates that the switch unit is closed to turn on the power module where the switch unit is located, thereby turning on the link for transmitting the first power supply connected to the switch module (the transmission module transmits the first power supply to the distribution module, the power module in the distribution module is turned on, and the first power supply is transmitted to the transmission element connected to the power module through the power module, and then output to the device under test through the transmission element). The above-mentioned switch disconnecting signal indicates that the switch unit is disconnected to disconnect the power module where the switch unit is located. In this way, the switch units of each power module in the distribution module are controlled by the signal switching module to realize the selection of the power modules in the distribution module.

[0061] Optional, see Figure 2 A schematic diagram of the specific structure of a parallel test switching device is shown in FIG. Figure 2The solid line represents power transmission, and the dashed line represents signal transmission. The power module includes a switching circuit and multiple power branches. The first power supply includes AC and DC power, and the multiple power branches include a power branch that transmits the AC power and a power branch that transmits the DC power. Each power branch is equipped with a switch unit that controls the on / off switching of the power branch. The switching circuit includes a driver chip. The input of the driver chip is connected to the signal switching module to obtain the switching signal, and the output of the driver chip is connected to the control terminal of the switch unit in the power module.

[0062] Optionally, the switch module can use a relay as the switch. The driver chip is a signal amplification chip, amplifying the received switching signal to control the power-on and closing of the relay coil. In this way, the switching circuit can receive the switching signal output by the MCU (which can be a GPIO signal) and enhance the driving capability through the driver chip, thereby reliably controlling the conduction and shutdown of the relay.

[0063] Optionally, the power supply module may include one or more power supply branches for transmitting direct current, and one or more power supply branches for transmitting alternating current. A relay may be provided for the power supply branch for transmitting direct current to control the conductivity of the power supply branch. For the power supply branch for transmitting alternating current, a relay may be configured for each phase of electricity to control the relays corresponding to all phases of the alternating current to be turned on, thereby achieving the conduction of the power supply branch. Similarly, the relays corresponding to all phases of the alternating current may be controlled to be turned off, thereby achieving the disconnection of the power supply branch. The driver chip may output multiple drive signals, each drive signal corresponding to controlling the conduction state of a relay in the power supply module.

[0064] For example, see Figure 2 The transmission unit transmits 28V DC and 115V AC, and each power module is equipped with two 28V DC power branches and one 115V AC power branch.

[0065] Based on the above embodiment, the transmission module includes a first connector and a second connector;

[0066] The first connector is used to transmit the test signal and the first power supply;

[0067] The second connector is used to transmit the control data, which includes a programmable network signal and a second power supply. The programmable network signal is used to indicate the target transmission element, and the second power supply is used to provide electrical energy for the signal switching module.

[0068] Optionally, the first connector and the second connector may be aviation connectors.

[0069] Aviation connectors have good electrical properties, mechanical properties and environmental adaptability, and can ensure reliable circuit connection and signal transmission under complex environmental conditions.

[0070] Optionally, the transmission element may also be an aviation connector.

[0071] Optionally, the second connector is provided with an Ethernet interface for transmitting the program-controlled network signal.

[0072] Optionally, the second power supply is a DC power supply to facilitate powering the device. Specifically, it can power the signal switching module and the relay coil. Because the voltages required by various components are different, the device can also be configured with a power conversion branch. The input end of the power conversion circuit is connected to the second connector to obtain the second power supply; the input end of the power conversion circuit is connected to the second connector to obtain the second power supply; and the output end of the power conversion circuit is connected to the signal switching module to convert the voltage of the second power supply according to the driving voltage of the signal switching module. Furthermore, when the switching unit uses a relay to control the conductivity of the power module, the output end of the power conversion circuit is also connected to the power supply end of the relay coil. The power conversion circuit also needs to convert the voltage of the second power supply according to the power supply required by the relay coil.

[0073] Exemplarily, the power conversion circuit is used to convert the second power supply input externally (which can be a 24V DC power supply) into 5V and 3.3V voltages available to the MCU core circuit in the signal switching module, and at the same time convert 24V into a 12V relay coil power supply voltage.

[0074] Based on the above embodiment, see Figure 2 , the test signal transmitted by the first connector of the present application may include a PCM code stream, a 1553B signal and a switch signal. The signal switching module of the present application can be configured with 1 PCM code stream, 2 1553B signals, and 7 switch signals. Of course, it can also be configured with 1 low-bandwidth, 4 high-bandwidth, etc. The signal switching module switches each signal and sends it to the corresponding transmission element, and then sends it to the device under test. In addition, the above-mentioned signal switching module can be connected to the power distribution module through the RS232 interface to output the switching signal, and at the same time, it also provides a second power supply for the power distribution module.

[0075] Optionally, the 1553B signal can be switched and transmitted to the target transmission element through the signal switching module, so as to be sent to the device under test connected to the target transmission element. Figure 2The above-mentioned device may further include a linear coupler, wherein the input end of the linear coupler is used to receive the 1553B signal, and the output end of the linear coupler is used to connect to the multiple transmission elements. The 1553B signal is sent to the multiple transmission elements in parallel. Furthermore, in combination with the coupler, the device under test can be tested in a truth table short-circuiting manner during testing. In this way, the use of a linear coupler can achieve electrical isolation and provide effective shielding against electromagnetic interference, ensuring the accuracy and integrity of signal transmission.

[0076] See also Figure 2 , the signal switching module and the power distribution module can be configured with connectors for sending and receiving signals.

[0077] Based on the above embodiment, see Figure 3 The figure shows the external structure of an installation box. The device described above can also be configured with an installation box, in which the signal switching module and the power distribution module can be installed to shield electromagnetic interference and improve the device's anti-interference capabilities. The first connector, second connector, and multiple transmission elements are disposed on the side walls of the installation box to facilitate connection between components inside the installation box and external devices.

[0078] Optionally, a plurality of transmission elements 1 are arranged on a first side wall of the installation box, and a first connector 2 and a second connector 3 are arranged on a second side wall of the installation box.

[0079] Optionally, a plurality of channel indicator lights 4 are provided on the first surface of the installation box, and the plurality of channel indicator lights correspond to the plurality of transmission elements 1 one by one, and the plurality of channel indicator lights are connected to the signal switching module; the signal switching module is used to control the channel indicator lights 4 corresponding to the transmission elements connected to the switch unit to light up when the switch unit is closed. For example, the GPIO pin of the MCU in the signal switching module can be used to indicate the selection state. When the selection is as follows: Figure 2 When the power module 1 is turned on, the channel indicator light corresponding to the transmission element connected to the power module 1 is on, and the other power modules (such as Figure 2 The channel indicators of the power modules 2-6) in the UPS are off.

[0080] The switch unit uses a relay to control the on and off of the power module. In this way, after the signal switching module collects the operating voltage of all relays in the power module, it controls the channel indicator light corresponding to the transmission element connected to the switch unit to light up, making it convenient for the user to determine the current output test signal and the first power supply transmission element, and then to facilitate the determination of the test equipment currently connected to the transmission element for testing.

[0081] Optionally, the first surface is further provided with a self-test indicator light 5; the signal switching module is used to control the self-test indicator light 5 to light up when the power supply and network of the device are detected to be normal, so that the user can intuitively determine whether there is any power supply or network abnormality in the device.

[0082] The above-mentioned device can connect to multiple devices under test (DUTs) via multiple transmission elements. Through the control and signal transmission of the signal switching module, the interface functions or parameters of multiple test devices can be tested simultaneously. This allows for parallel testing of multiple DUTs, shortening test time. Compared to traditional serial testing, there is no need to wait for the test device in one channel to complete before testing the test device in the next channel, reducing overall test time and speeding up the entire testing process. Furthermore, due to the shortened test time, the test device's occupancy time is also reduced, effectively improving test device utilization.

[0083] The embodiments of the present application also provide corresponding testing equipment for implementing the solutions provided in the embodiments of the present application.

[0084] Wherein, the test equipment adopts a parallel test switching device described in any one of the above embodiments.

[0085] The "first" and "second" in the names such as "first" and "second" (if any) mentioned in the embodiments of this application are only used as name identifiers and do not represent the first or second in order.

[0086] Through the description of the above embodiments, it can be known that those skilled in the art can clearly understand that all or part of the steps in the above embodiment methods can be implemented by means of software plus a general hardware platform. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a storage medium, such as a read-only memory (ROM) / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network communication device such as a router) to execute the methods described in each embodiment or certain parts of the embodiments of the present application.

[0087] Each embodiment in this specification is described in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple. For the relevant parts, refer to the partial description of the method embodiment. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment. Those of ordinary skill in the art can understand and implement it without paying any creative work.

[0088] The above description is merely an exemplary embodiment of the present application and is not intended to limit the scope of protection of the present application.

Claims

1. A parallel test switching device, characterized in that: include: Transmission module, signal switching module, power distribution module and multiple transmission elements; The output end of the transmission element is connected to the signal switching module and the power distribution module, and the output end of the signal switching module is connected to the power distribution module and the plurality of transmission elements; The output end of the power distribution module is connected to the multiple transmission elements; The transmission module is configured to transmit the received control data and test signal to the signal switching module, and transmit the received first power supply to the power distribution module; The signal switching module is configured to send a switching signal to the power distribution module based on the control data, and send the test signal to a target transmission element indicated by the control data, wherein the target transmission element is one or more of the plurality of transmission elements; The power distribution module is used to respond to the switching signal and select the power supply module connected to the target transmission element to transmit the first power supply to the target transmission element through the power supply module. The power distribution module includes multiple power supply modules, each of which is connected to a transmission element.

2. The device according to claim 1, characterized in that The signal switching module is connected to the control end of the switch unit in the power module; The power module is configured to transmit the first power supply to the transmission element connected to the power module when the switch unit in the power module is closed; The signal switching module is used to send a switching signal to the power module in the power distribution module, and the switching signal includes a switch closing signal sent to the switch unit in the power module connected to the target transmission element, and a switch opening signal sent to the switch unit in the power module not connected to the target transmission element.

3. The device according to claim 2, characterized in that The power supply module includes a switching circuit and a plurality of power supply branches; the first power supply includes alternating current and direct current, and the plurality of power supply branches include a power supply branch for transmitting the alternating current and a power supply branch for transmitting the direct current; The power supply branch is provided with a switch unit for controlling the power supply branch to be turned on or off; The switching circuit includes a driver chip, an input end of the driver chip is connected to the signal switching module to obtain the switching signal, and an output end of the driver chip is connected to a control end of a switch unit in the power module.

4. The device according to claim 2, characterized in that The transmission module includes a first connector and a second connector; The first connector is used to transmit the test signal and the first power supply; The second connector is used to transmit the control data, which includes a programmable network signal and a second power supply. The programmable network signal is used to indicate the target transmission element, and the second power supply is used to provide electrical energy for the signal switching module.

5. The device according to claim 2, characterized in that The test signal includes PCM code stream, 1553B signal, and switch signal; The device further includes a linear coupler, wherein an input end of the linear coupler is used to receive the 1553B signal, and an output end of the linear coupler is used to connect the multiple transmission elements.

6. The device according to claim 3, characterized in that Also includes a mounting box; The signal switching module and the power distribution module are arranged in the installation box, and the first connector, the second connector and a plurality of transmission elements are arranged on the side wall of the installation box; A plurality of channel indicator lights are provided on the first surface of the installation box, the plurality of channel indicator lights correspond one-to-one to the plurality of transmission elements, and the plurality of channel indicator lights are connected to the signal switching module; The signal switching module is used to control the channel indicator light corresponding to the transmission element connected to the switch unit to light up when the switch unit is closed.

7. The device according to claim 6, characterized in that The first surface is also provided with a self-test indicator light; The signal switching module is used to control the self-test indicator light to light up when it is detected that the power supply and network of the device are normal.

8. The device according to claim 1, characterized in that The first connector, the second connector, and the transmission element are all aviation connectors.

9. The device according to claim 3, characterized in that Also includes power conversion circuit, The input end of the power conversion circuit is connected to the second connector to obtain the second power supply; The output end of the power conversion circuit is connected to the signal switching module, and is used to convert the voltage of the second power supply according to the driving voltage of the signal switching module.

10. A device under test, characterized in that: A parallel test switching device according to any one of claims 1 to 9 is used.

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