A multi-channel portable transmitter dummy load

Abstract

The utility model discloses a kind of multi-channel portable transmitter dummy load, including resistance module, heat dissipation module, test module, connector, case module, the resistance module, heat dissipation module, test module are installed in case module, resistance module, capacitor module and test module parallelly connected conversion module;Resistance module is used to absorb the electric energy of transmitter output, simulates transducer real use environment;Conversion module is connected transmitter by case module, realizes that transmitter multi-channel power amplifier output can all be switched to resistance module;Test module is used to check dummy load soundness, and monitor transmitter multi-channel power amplifier output parameter;The heat dissipation module is used to heat dissipation for resistance module.The utility model has the characteristics such as small size, light weight, convenient to carry and can be used in boat etc., improve the convenience and work efficiency of debugging test, with the advantage of continuous emission, can shorten transmitter troubleshooting time, reduce transmitter damage risk, improve equipment reliability.

Description

Technical Field

[0001] This utility model relates to a test device for a transmitter, specifically a multi-channel portable transmitter dummy load. Background Technology

[0002] Transmitters are widely used in the marine field, primarily in sonar transmission systems. The transmitter receives transmission commands, generates signals and forms beams according to the requirements, and amplifies the generated signals. The amplified electrical signals then excite corresponding transducers in the transmission array to radiate sound waves into the water. The receiver receives the echo signals from underwater targets for information acquisition and target detection and identification.

[0003] According to technical requirements, the transmitter must not be launched without a load to avoid dry firing and equipment damage. Except for lake tests and sea tests where the transmitter is connected to the launch array (to meet the water depth requirements), all other tests require the connection of a dummy load for active launch.

[0004] Without load, it is impossible to perform a comprehensive test on the transmitter, and high-power no-load transmission can easily damage the equipment.

[0005] A transmitter dummy payload and its connection to the transmitter are required for a certain project. This dummy payload provides 24 load channels, with each unit measuring 760mm*650mm*810mm and weighing 120kg. This dummy payload is expensive to manufacture, inconvenient to carry, and incurs high transportation costs during field testing. Because the boat's inlet diameter is approximately 600mm, the dummy payload cannot be carried inside the boat, failing to meet the requirements for mooring tests and transmitter fault diagnosis. Therefore, designing a 24-channel portable dummy payload for this type of transmitter is urgent and necessary.

[0006] A transmitter dummy payload and its connection to the transmitter are required for a certain project. This dummy payload provides 36 channels of load, with each unit measuring 760mm*650mm*810mm and weighing 120kg. This dummy payload is expensive to manufacture, inconvenient to carry, and incurs high transportation costs during field testing. Because the boat's inlet diameter is approximately 600mm, the dummy payload cannot be carried inside the boat for use, failing to meet the requirements for mooring tests and transmitter fault diagnosis. Therefore, designing a 36-channel portable dummy payload for this type of transmitter is urgent and necessary.

[0007] A transmitter dummy payload and its connection to the transmitter are required for a certain project. This dummy payload provides 48 load channels, with each unit measuring 760mm*650mm*850mm and weighing 120kg. This dummy payload is expensive to manufacture, inconvenient to carry, and incurs high transportation costs when used in the field. Due to its 600mm wide hatch, the dummy payload cannot be carried inside the transmitter compartment, failing to meet the needs of transmitter testing and maintenance. Therefore, designing a 48-channel portable dummy payload for this type of transmitter is necessary. Utility Model Content

[0008] To address the deficiencies and shortcomings of the existing technology, this invention provides a multi-channel portable transmitter dummy load that can be used to check multiple transmission channels of a transmitter by connecting only one dummy load. It features small size, light weight, portability, and can be used inside a submarine, improving the convenience and efficiency of debugging and testing. It enables the transmitter to launch continuously, shortens the troubleshooting time, reduces the risk of transmitter damage, improves equipment reliability, and is easy to carry and operate.

[0009] The technical solution of this utility model is as follows: A multi-channel portable transmitter dummy load includes a resistor module, a heat dissipation module, a test module, a connector, and a chassis module. The resistor module, heat dissipation module, and test module are installed in the chassis module. The resistor module, capacitor module, and test module are connected in parallel to the conversion module.

[0010] The resistor module is used to absorb the electrical energy output by the transmitter, simulating the real operating environment of the transducer;

[0011] The conversion module is connected to the transmitter via a chassis module, enabling multiple power amplifier outputs from the transmitter to be converted to the resistor module.

[0012] The test module is used to check the integrity of the dummy load and monitor the output parameters of the transmitter's multi-channel power amplifier;

[0013] The heat dissipation module is used to dissipate heat from the resistor module.

[0014] Preferably, the chassis module consists of an input connector, a frame, a top cover, a base, a left side panel, a right side panel, a handle, silent feet, and a support block. The handle is mounted on the top cover, the support block and silent wheels are mounted on the base, and the input connector is mounted on the top cover.

[0015] Preferably, the resistor module consists of multiple resistors, which are UXP250 planar 200Ω resistors with a rated power of 250W, a rated temperature of less than 85 degrees Celsius, and dimensions of 70*60mm; they are installed inside the chassis module.

[0016] Preferably, the input connector consists of multiple connectors that are evenly arranged at both ends of the upper cover of the chassis module.

[0017] Preferably, the conversion module consists of cables and connectors and is formed separately. The conversion module is connected to the transmitter through the input connector on the chassis module, so that the multi-channel power amplifier output of the transmitter can be converted to the resistor module.

[0018] Preferably, the test module consists of multiple test terminals mounted on the left and right panels. The test terminals are composed of 4mm pure copper banana plug sockets, which can withstand a 20A current surge. The socket length is 28*10.5mm, and the protruding part is only 5mm to prevent human or mechanical impact. The resistors and test terminals are connected in parallel to the conversion module. The test module is used to check the integrity of the dummy load and monitor the output parameters of the transmitter's multi-channel power amplifier.

[0019] Preferably, the entire frame of the chassis module is made of aluminum alloy, the heat dissipation module is made of aluminum alloy profile, the upper part of the heat dissipation module is connected by two T-shaped profiles with dimensions of 30*20*1.5mm, the lower part of the heat dissipation module is connected by two L-shaped profiles with dimensions of 15*15*2mm, the upper cover is connected by a U-shaped profile with dimensions of 100*20*2mm and an inner diameter of 96mm, and the base is composed of a U-shaped profile with dimensions of 20*10*2mm and an inner diameter of 16mm, with rubber feet with dimensions of 19*16*15mm.

[0020] Preferably, the multi-channel portable transmitter dummy load includes 24-channel portable transmitter dummy load, 36-channel portable transmitter dummy load, and 48-channel portable transmitter dummy load.

[0021] Preferably, the heat dissipation module of the 24-channel portable transmitter dummy load consists of 230*70*25mm aluminum alloy heat sinks, which are installed on the front and back of the chassis, with 4 heat sinks on each side; the heat dissipation module of the 36-channel portable transmitter dummy load consists of 460*70*25mm aluminum alloy heat sinks, which are installed on the front and back of the chassis, with 3 heat sinks on each side; the heat dissipation module of the 48-channel portable transmitter dummy load consists of 460*70*25mm aluminum alloy heat sinks, which are installed on the front and back of the chassis, with 4 heat sinks on each side; when the dummy load is working continuously, the heat sinks dissipate heat to the resistors, thereby protecting the resistors.

[0022] A method for operating a multi-channel portable transmitter dummy load is described. The steps for using a 24-channel portable transmitter dummy load are as follows: Before using the dummy load, connect a multimeter and an insulation tester to the test terminals on the front panel of the dummy load to check that the resistance value and insulation are within acceptable ranges. After ensuring that the dummy load is normal, select different angle beams of the transmitter via cables to check the output frequency, power, and pulse parameters of the 24 transducers across multiple channels, thereby locating transmitter faults. While a transmitter connected to a transmitter array can only operate for single transmissions, connecting to a dummy load allows for continuous transmission, thus better enabling transmitter testing and maintenance.

[0023] The steps for using a 36-channel portable transmitter dummy load are as follows: Before using the dummy load, connect a multimeter and an insulation tester to the test terminals on the front panel of the dummy load to check that the resistance and insulation are within acceptable ranges. After ensuring the dummy load is normal, connect X7 and X8 of the transmitter T-C2 to X1 and X2 of the dummy load respectively using cables. Then, use an oscilloscope to connect to the test terminals on the front panel in sequence. Control the transmitter with a PC. On the PC's application software, select different beam angles to check the output frequency, power, and pulse parameters of the 180 transducers across the 36 channels of the transmitter, thereby locating transmitter faults. Connecting the transmitter to the transmitter array only allows for single-transmission operation, while connecting to the dummy load allows for continuous transmission, making it easier to test and maintain the transmitter.

[0024] The steps for using a dummy load on a 48-channel portable transmitter are as follows: Before using the dummy load, connect a multimeter and an insulation tester to the test terminals on the front panel of the dummy load to check that the resistance and insulation are within acceptable ranges. After ensuring that the dummy load is normal, connect the transmitter outputs 1, 2, 3, and 4 to the load terminals 1, 2, 3, and 4 respectively using cables. Then, connect an oscilloscope to the test terminals on the front panel in sequence. Control the transmitter to operate at different beam angles to check the output frequency, power, and pulse parameters of the 48-channel transducers, thereby assisting in troubleshooting. In some cases, connecting the transmitter to a transmitter array may not allow it to transmit at full power, thus failing to fully expose problems. However, connecting it to a dummy load allows for full-power transmission, making it easier to test and maintain the transmitter.

[0025] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0026] This invention fills a gap in certain projects where dummy loads are unavailable. At any stage, the transmitter only needs to be connected to one dummy load to check multiple (24, 36, or 48) transmission channels. The transmitter's power amplifier is multi-channel, and all channels participate in the transmission to form a transmission beam during each transmission, driving the multi-channel transmission array transducers or loads. This dummy load is small in size, lightweight, portable, and can be used inside the submarine, improving the convenience and efficiency of debugging and testing. The portable dummy load allows the transmitter to transmit continuously, shortening troubleshooting time, reducing the risk of transmitter damage, and improving equipment reliability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model after the side panels have been removed;

[0028] Figure 2 This is a schematic diagram of the radiator structure in Embodiment 1 of this utility model;

[0029] Figure 3 This is a schematic diagram of the top cover structure in Embodiment 1 of this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0031] Figure 5 This is a front view of Embodiment 1 of the present utility model;

[0032] Figure 6 This is a schematic diagram of the structure after removing the side panel in Embodiment 2 of this utility model;

[0033] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0034] Figure 8 This is a front view of Embodiment 2 of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure after removing the side panel in Embodiment 3 of this utility model;

[0036] Figure 10 This is a schematic diagram of the structure of Embodiment 3 of this utility model;

[0037] Figure 11 This is a schematic diagram of the side plate of Embodiment 3 of this utility model;

[0038] In the diagram: 1. T-profile, 2. Resistor module, 3. U-profile, 4. Resistor, 5. Heat dissipation module, 6. L-profile, 7. Base U-profile, 8. Buffer pad, 9. Left side plate, 10. Connector, 11. Right side plate, 12. Handle. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Example 1

[0041] Reference Figure 1-5 This embodiment takes a 24-channel portable transmitter dummy load as an example (the external dimensions are 230mm*300mm*145mm and the weight is 6Kg), and mainly includes a resistor module 1, a heat dissipation module 2, an adapter module 3, a test module 4, and a chassis module 5.

[0042] The 24 resistors in resistor module 1 are installed vertically in three layers. Three resistors are fixed to each heatsink using M3 hex bolts, spaced 20mm apart. The resistors and test terminals are connected in parallel to the conversion module. The resistors primarily absorb the electrical energy output from the transmitter.

[0043] The heat dissipation module 2 mainly consists of 8 heat sinks, each measuring 230*70*25mm. The heat dissipation module is formed by a 300mm long support frame (T-shaped and L-shaped profiles are evenly distributed). It is mainly used to absorb the heat generated by the resistor. By utilizing the large tooth pitch of the heat sink, the heat is quickly conducted away. Therefore, the main function of the heat dissipation module is to quickly dissipate heat and cool down.

[0044] The conversion module 3 mainly consists of connectors and cables. The cabinet-side connector matches the cabinet, and the load-side connector connects to the load. Nine loads are connected through the X1 socket, nine loads through the X2 socket, and 15 loads each through the X3 and X4 sockets, enabling rapid connection of all channels.

[0045] Test module 4 mainly consists of 48 test terminals, with 2 test terminals (red and green) forming a group, for a total of 24 groups. These groups are installed on the left panel (12 channels) and the right panel (12 channels). Resistors and test terminals are connected in parallel to the conversion module. The test module can be used to check the integrity of the dummy load and monitor the output parameters of the transmitter's 24 power amplifier channels.

[0046] The chassis module 5 mainly consists of 4 input connectors 17 (X1, X2, X3, X4), 6 panels (top cover 15, front panel 16, left side panel 17, right side panel 18, bottom panel 19, rear panel 20), 1 handle 10, 1 support block 6, and 1 support block 8. The handle is mounted on the top cover, and the support blocks are mounted on the front and rear panels 16 and 20. The chassis module is compact, lightweight, and easy to carry, truly achieving portable dummy load operation.

[0047] Before using the dummy load, connect a multimeter and a capacitance meter to the test terminals on the front panel of the dummy load to check that the resistance and capacitance values ​​are within acceptable ranges. After ensuring the dummy load is functioning correctly, connect transmitter X7 and X8 in T-T1 cabinet to dummy loads X1 and X2 respectively, and connect transmitter X6 and X7 in T-T2 cabinet to dummy loads X3 and X4 respectively. Then connect the transmitter to the PC via a network cable and use an oscilloscope to connect to the test terminals on the front panel sequentially. The PC controls the transmitter to check the 24-channel output frequency, power, pulse, and other parameters to pinpoint transmitter faults. Connecting the transmitter to the transmitter array only allows for single-transmission operation, while connecting to the dummy load allows for continuous transmission, making transmitter testing and maintenance easier.

[0048] The portable dummy payload of this embodiment is easy to carry and easy to connect to the transmitter.

[0049] The portable dummy load in this embodiment is mainly used for transmitter testing and maintenance, and is a simple and effective testing tool with 24 channels. The transmitter must not fire without a load; it must be connected to a launch array (meeting the water depth requirements) or a dummy load to actively launch. Except for lake tests and sea tests where the transmitter is connected to a launch array, all other tests require a dummy load. The dummy load is an indispensable accessory for both indoor and outdoor field tests. With this dummy load, test personnel can perform transmitter self-tests and other tasks in any situation, greatly reducing the workload of test personnel and shortening maintenance time.

[0050] Example 2

[0051] Reference Figure 6-8 This embodiment takes a 36-channel portable transmitter dummy load as an example (the external dimensions are 500mm*223mm*145mm and the weight is 9Kg), which mainly includes a resistor module 1, a heat dissipation module 2, an adapter module 3, a test module 4, and a chassis module 5.

[0052] The 36 resistors in resistor module 1 are installed vertically in 6 layers. Six resistors are fixed to each heatsink using M3 hex bolts, with a spacing of 20mm. The resistors and test terminals are connected in parallel to the conversion module. The resistors primarily absorb the electrical energy output from the transmitter.

[0053] The heat dissipation module 2 mainly consists of 6 heat sinks, each measuring 460*70*25mm. The heat dissipation module is formed by a 230mm long support frame (T-shaped and L-shaped profiles are evenly distributed). It is mainly used to absorb the heat generated by the resistor. By utilizing the large tooth pitch of the heat sink, the heat is quickly conducted away. Therefore, the main function of the heat dissipation module is to quickly dissipate heat and cool down.

[0054] The conversion module 3 mainly consists of connectors and cables. The cabinet-side connector matches the cabinet, and the load-side connector connects to the load. Nine loads are connected through the X1 socket, nine loads through the X2 socket, and 15 loads each through the X3 and X4 sockets, enabling rapid connection of all channels.

[0055] Test module 4 mainly consists of 72 test terminals, with 2 test terminals (red and green) forming a group, for a total of 36 groups. These groups are installed on the left panel (18 channels) and the right panel (18 channels). Resistors and test terminals are connected in parallel to the conversion module. The test module can be used to check the integrity of the dummy load and monitor the output parameters of the transmitter's 36 power amplifier channels.

[0056] The chassis module 5 mainly consists of 4 input connectors 17 (X1, X2, X3, X4), 6 panels (top cover, front panel, left side panel, right side panel, bottom panel, and rear panel), 1 handle, 1 support block, and 1 support block. The handle is mounted on the top cover, and the support blocks are mounted on the front and rear panels. The chassis module is compact, lightweight, and easy to carry, truly achieving portable dummy load operation.

[0057] Before using the dummy load, connect a multimeter and a capacitance meter to the test terminals on the front panel of the dummy load to check that the resistance and capacitance values ​​are within acceptable ranges. After ensuring the dummy load is functioning correctly, connect the transmitter's T-C2 cabinet X7 and X8 to the dummy loads X1 and X2 respectively via cables. Then connect the transmitter to the PC and use an oscilloscope to connect to the test terminals on the front panel in sequence. The PC controls the transmitter's operation, checking the transmitter's 36-channel output frequency, power, pulse, and other parameters to pinpoint transmitter faults. Connecting the transmitter to the transmitter array only allows for single-transmission operation, while connecting to the dummy load allows for continuous transmission, making transmitter testing and maintenance easier.

[0058] This utility model's portable dummy payload is easy to carry and convenient to connect to the transmitter.

[0059] The portable dummy load in this embodiment is mainly used for transmitter testing and maintenance, and is an effective and simple testing tool for 36 channels. The transmitter must not fire without a load; it can only actively fire when connected to a launch array (meeting the water depth requirements) or a dummy load. Except for lake tests and sea tests where the transmitter is connected to a launch array, all other tests require a dummy load. The dummy load is an indispensable supporting equipment for both indoor and outdoor field tests. With this dummy load, test personnel can perform transmitter self-tests and other tasks in any situation, greatly reducing the workload of test personnel and shortening maintenance time.

[0060] Example 3

[0061] Reference Figure 9-11 This embodiment takes a 48-channel portable transmitter dummy load as an example (the external dimensions are 500mm*300mm*145mm and the weight is 12Kg), and mainly includes a resistor module 1, a heat dissipation module 2, an adapter module 3, a test module 4, and a chassis module 5.

[0062] The 48 resistors in resistor module 1 are installed vertically in 6 layers. Six resistors are fixed to each heatsink using M3 hex bolts, spaced 10mm apart. The resistors and test terminals are connected in parallel to the conversion module. The resistors primarily absorb the electrical energy output from the transmitter.

[0063] The heat dissipation module 2 mainly consists of 8 heat sinks, each measuring 460*70*25mm. The heat dissipation module is formed by a 300mm long support frame (T-shaped and L-shaped profiles are evenly distributed). It is mainly used to absorb the heat generated by the resistor. By utilizing the large tooth pitch of the heat sink, the heat is quickly conducted away. Therefore, the main function of the heat dissipation module is to quickly dissipate heat and cool down.

[0064] The conversion module 3 mainly consists of connectors and cables. The cabinet-side connector matches the cabinet, and the load-side connector connects to the load. Nine loads are connected through socket #1, nine loads through socket #2, and 15 loads each through sockets #3 and #4, enabling rapid connection of all channels.

[0065] Test module 4 mainly consists of 96 test terminals, with 2 test terminals (red and black) forming a group, for a total of 48 groups. These groups are installed on the left panel (24 channels) and the right panel (24 channels). Resistors and test terminals are connected in parallel to the conversion module. The test module can be used to check the integrity of the dummy load and monitor the output parameters of the 48-channel power amplifier of the transmitter.

[0066] The chassis module 5 mainly consists of 4 input connectors (1#, 2#, 3#, 4#), 6 panels (top cover, front panel, left side panel, right side panel, bottom panel, and rear panel), 1 handle, 1 support block, and 1 support block. The handle is mounted on the top cover, and the support blocks are mounted on the front and rear panels. The chassis module is compact, lightweight, and easy to carry, truly achieving portable dummy load operation.

[0067] Before using the dummy load, connect a multimeter and an insulation tester to the test terminals on the front panel of the dummy load to check that the resistance and insulation are within acceptable ranges. After ensuring that the dummy load is normal, connect the transmitter outputs 1, 2, 3, and 4 to the load terminals 1, 2, 3, and 4 respectively via cables. Then, use an oscilloscope to connect the test terminals on the front panel in sequence. Control the transmitter to operate at different beam angles to check the output frequency, power, and pulse parameters of the transmitter's 48 transducers, thereby assisting in troubleshooting. In some cases, the transmitter cannot transmit at full power when connected to a transmitter array, which may not fully expose the problem. However, when connected to a dummy load, it can transmit at full power, which can better complete the testing and maintenance of the transmitter.

[0068] The portable dummy load in this embodiment is mainly used for transmitter testing and maintenance, and is an effective and simple testing tool for 48 channels. Transmitters must not fire without a load; they can only actively fire when connected to a transmitter array (meeting the water depth requirements) or a dummy load. Except for lake and sea trials where the transmitter is connected to a transmitter array, all other tests require a dummy load. The dummy load is an indispensable accessory for both indoor and outdoor field tests. With this dummy load, testers can perform transmitter self-tests and other tasks in any situation, greatly reducing the workload of testers and shortening maintenance time.

[0069] Although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these specific embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-path portable transmitter dummy load, characterized by: It includes a resistor module, a heat dissipation module, a test module, a connector, and a chassis module. The resistor module, heat dissipation module, and test module are installed in the chassis module. The resistor module, capacitor module, and test module are connected in parallel to the conversion module. The resistor module is used to absorb the electrical energy output by the transmitter, simulating the real operating environment of the transducer; The conversion module is connected to the transmitter via a chassis module, enabling multiple power amplifier outputs from the transmitter to be converted to the resistor module. The test module is used to check the integrity of the dummy load and monitor the output parameters of the transmitter's multi-channel power amplifier; The heat dissipation module is used to dissipate heat from the resistor module.

2. The multi-path portable transmitter dummy load of claim 1, wherein: The chassis module consists of an input connector, a frame, a top cover, a base, a left side panel, a right side panel, a handle, silent feet, and a support block. The handle is mounted on the top cover, the support block and silent wheels are mounted on the base, and the input connector is mounted on the top cover.

3. The multi-path portable transmitter dummy load of claim 2, wherein: The resistor module consists of multiple resistors, which are UXP250 planar 200Ω resistors with a rated power of 250W, a rated temperature of less than 85 degrees, and dimensions of 70*60mm. It is installed inside the chassis module.

4. The multi-path portable transmitter dummy load of claim 3, wherein: The input connector consists of multiple connectors, which are evenly arranged at both ends of the upper cover of the chassis module.

5. The multi-path portable transmitter dummy load of claim 4, wherein: The conversion module consists of cables and connectors and is formed separately. The conversion module is connected to the transmitter through the input connector on the chassis module, so that the multi-channel power amplifier output of the transmitter can be converted to the resistor module.

6. The multi-channel portable transmitter dummy load according to claim 5, characterized in that: The test module consists of multiple test terminals mounted on the left and right panels. The test terminals are composed of 4mm pure copper banana plug sockets, which can withstand a 20A current surge. The socket length is 28*10.5mm, and the protruding part is only 5mm to prevent human or mechanical impact. The resistors and test terminals are connected in parallel to the conversion module. The test module is used to check the integrity of the dummy load and monitor the output parameters of the transmitter's multi-channel power amplifier.

7. The multi-channel portable transmitter dummy load according to claim 6, characterized in that: The entire frame of the chassis module is made of aluminum alloy. The heat dissipation module is made of aluminum alloy profile. The upper part of the heat dissipation module is connected by two T-shaped profiles with dimensions of 30*20*1.5mm. The lower part of the heat dissipation module is connected by two L-shaped profiles with dimensions of 15*15*2mm. The top cover is connected by a U-shaped profile with dimensions of 100*20*2mm and an inner diameter of 96mm. The base is composed of a U-shaped profile with dimensions of 20*10*2mm and an inner diameter of 16mm, along with rubber feet with dimensions of 19*16*15mm.

8. The multi-channel portable transmitter dummy load according to claim 2, characterized in that: The multi-channel portable transmitter dummy load includes 24-channel, 36-channel, and 48-channel portable transmitter dummy loads.

9. The multi-channel portable transmitter dummy load according to claim 8, characterized in that: The heat dissipation module of the 24-channel portable transmitter dummy load consists of 230*70*25mm aluminum alloy heat sinks, which are installed on the front and back of the chassis, with 4 heat sinks on each side; the heat dissipation module of the 36-channel portable transmitter dummy load consists of 460*70*25mm aluminum alloy heat sinks, which are installed on the front and back of the chassis, with 3 heat sinks on each side; the heat dissipation module of the 48-channel portable transmitter dummy load consists of 460*70*25mm aluminum alloy heat sinks, which are installed on the front and back of the chassis, with 4 heat sinks on each side; when the dummy load is working continuously, the heat sinks dissipate heat to the resistors, thereby protecting the resistors.

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