Multi-path portable transmitter dummy load and working method thereof

Abstract

The invention discloses a multipath portable transmitter dummy load and a working method thereof, the multipath portable transmitter dummy load comprises a resistor module, a heat dissipation module, a test module, a connector and a cabinet module, the resistor module, the heat dissipation module and the test module are installed in the cabinet module, and the resistor module, a capacitor module and the test module are connected in parallel with a conversion module; the resistance module is used for absorbing electric energy output by the transmitter and simulating the real use environment of the transducer; the conversion module is connected with the transmitter through the case module, so that multi-channel power amplifier output of the transmitter can be switched to the resistor module; the test module is used for checking the integrity of the dummy load and monitoring the output parameters of the multi-channel power amplifier of the transmitter; and the heat dissipation module is used for dissipating heat of the resistor module. The device has the advantages of being small in size, light in weight, convenient to carry, capable of being used in a boat and the like, the convenience and working efficiency of a debugging test are improved, the device has the advantage of continuous emission, the troubleshooting time of an emitter can be shortened, the damage risk of the emitter is reduced, and the equipment reliability is improved.

Description

Technical Field

[0001] The invention relates to a transmitter testing device, in particular to a multi-channel portable transmitter dummy load and a working method thereof. Background Art

[0002] Transmitters are widely used in the marine sector, primarily in sonar transmission systems. They receive transmission commands, generate signals and perform beamforming based on these commands, and amplify the generated signals. The amplified electrical signals excite the corresponding transducers in the transmitting array, radiating sound waves into the water. Receivers then receive echo signals from underwater targets for information collection and target detection and identification.

[0003] According to technical requirements, transmitters are strictly prohibited from transmitting without a load to avoid damage to the equipment due to empty transmissions. Except for lake tests and navigation tests where the transmitter is connected to the transmitting array (meeting the required water depth), all other tests require a dummy load to enable active transmission.

[0004] In the no-load state, the transmitter cannot be fully tested, and high-power idle transmission may easily cause damage to the equipment.

[0005] A project involved a transmitter dummy load and its connection to the transmitter. This dummy load provided 24 load channels, measuring 760mm*650mm*810mm and weighing 120kg. This dummy load was expensive and inconvenient to carry, resulting in high transportation costs for field tests. Due to the approximately 600mm diameter of the boat's port, the dummy load could not be carried aboard the boat, making it unsuitable for mooring tests and transmitter troubleshooting. Therefore, designing a portable 24-channel dummy load for this transmitter was both urgent and necessary.

[0006] A project involved a transmitter dummy load and its connection to the transmitter. This dummy load provided 36 load channels, measuring 760mm*650mm*810mm and weighing 120kg. This dummy load was expensive and inconvenient to carry, resulting in high transportation costs for field tests. Due to the approximately 600mm diameter of the boat's port, the dummy load could not be carried aboard the boat, making it unsuitable for mooring tests and transmitter troubleshooting. Therefore, designing a portable 36-channel dummy load for this transmitter was both urgent and necessary.

[0007] A project involved a transmitter dummy load and its connection to the transmitter. This dummy load provided 48 load channels, measuring 760mm*650mm*850mm and weighing 120kg. This dummy load was expensive and inconvenient to carry, resulting in high transportation costs for field use. Due to the 600mm-wide hatch, the dummy load could not be brought inside the cabin, making it unsuitable for transmitter testing and maintenance. Therefore, a portable 48-channel dummy load was necessary for this transmitter. Summary of the Invention

[0008] In order to solve the defects and shortcomings of the above-mentioned prior art, the present invention provides a multi-channel portable transmitter dummy load and a working method thereof, which can achieve the purpose of checking the multi-channel transmission channels of the transmitter by connecting only one dummy load. The dummy load has the characteristics of small size, light weight, easy to carry and can be used in a boat, thereby improving the convenience and work efficiency of the debugging test, and enabling the transmitter to have the advantage of continuous transmission, which can shorten the transmitter troubleshooting time, reduce the risk of transmitter damage, improve equipment reliability, and is easy to carry and operate.

[0009] The technical solution of the present invention is as follows: a multi-channel portable transmitter dummy load, comprising a resistor module, a heat dissipation module, a test module, a connector, and a chassis module, wherein the resistor module, the heat dissipation module, and the test module are installed in the chassis module, and the resistor module, the capacitor module, and the test module are connected in parallel to a conversion module;

[0010] The resistance module is used to absorb the electrical energy output by the transmitter and simulate the actual use environment of the transducer;

[0011] The conversion module is connected to the transmitter via the chassis module, so that the multi-channel power amplifier output of the transmitter can be transferred 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 multi-channel power amplifier;

[0013] The heat dissipation module is used to dissipate heat for the resistance module.

[0014] Preferably, the chassis module consists of an input connector, a frame, an upper cover, a base, a left side panel, a right side panel, a handle, a silent foot pad, and a support block. The handle is installed on the upper cover, the support block and the silent wheel are installed on the base, and the input connector is installed on the upper cover.

[0015] Preferably, the resistance module is composed of a plurality of resistors, which are UXP250 planar 200Ω resistors with a rated power of 250W, a rated temperature less than 85 degrees, and a size of 70*60mm; and is installed inside the chassis module.

[0016] Preferably, the input connector is composed of a plurality of connectors, which are evenly arranged on both ends of the upper cover of the chassis module.

[0017] Preferably, the conversion module is composed of cables and connectors, which are 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 outputs of the transmitter can be transferred to the resistance module.

[0018] Preferably, the test module is composed of a plurality of test terminals, which are installed on the left and right panels. The test terminals are composed of 4mm pure copper banana head sockets, which can withstand 20A current impact. The socket length is 28*10.5mm, and the protruding part is only 5mm, which can prevent human impact or mechanical impact; the resistors and test terminals of the terminal blocks are connected in parallel to the conversion module, and the integrity of the dummy load is checked through the test module, and the output parameters of the multi-channel power amplifier of the transmitter are monitored.

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

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

[0021] Preferably, the heat dissipation module of the 24-channel portable transmitter dummy load is composed of a 230*70*25mm aluminum alloy radiator, which is installed on the front and back of the chassis, and each side is composed of 4 radiators; the heat dissipation module of the 36-channel portable transmitter dummy load is composed of a 460*70*25mm aluminum alloy radiator, which is installed on the front and back of the chassis, and each side is composed of 3 radiators; the heat dissipation module of the 48-channel portable transmitter dummy load is composed of a 460*70*25mm aluminum alloy radiator, which is installed on the front and back of the chassis, and each side is composed of 4 radiators; when the dummy load works continuously, the heat is dissipated to the resistor through the radiator, thereby protecting the resistor.

[0022] A method for operating a multi-channel portable transmitter dummy load, wherein the steps for setting up a 24-channel portable transmitter dummy load are as follows: before using the dummy load, connect the test terminals on the front panel of the dummy load with a multimeter and an insulation meter to check whether the resistor value and insulation are within the acceptable range; after ensuring that the dummy load is functioning properly, first select different angle beams of the transmitter via a cable to check the output frequency, power, and pulse parameters of the transmitter's 24 transducers, thereby locating transmitter faults; while the transmitter can only transmit once when connected to a transmitting array, it can transmit continuously when connected to a dummy load, thereby better completing transmitter testing and maintenance;

[0023] The steps for installing a 36-channel portable transmitter dummy load are as follows: Before using the dummy load, use a multimeter and an insulation meter to connect the test terminals on the front panel of the dummy load to check that the resistor value and insulation are within the qualified range; after ensuring that the dummy load is normal, first connect X7 and X8 of the transmitter T-C2 to X1 and X2 of the dummy load respectively through cables, and use an oscilloscope to connect the test terminals on the front panel in sequence; the PC controls the operation of the transmitter, and different angle beams are selected through operations on the PC application software to check the output frequency, power, and pulse parameters of the 36 channels and 180 transducers of the transmitter, thereby locating the transmitter fault; the transmitter can only transmit once when connected to the transmitting array, but it can transmit continuously when connected to the dummy load, which better completes the testing and maintenance of the transmitter;

[0024] The steps for setting up a 48-channel portable transmitter dummy load are as follows: Before using the dummy load, use a multimeter and an insulation meter to connect the test terminals on the front panel of the dummy load to check that the resistor value and insulation are within the qualified range; after ensuring that the dummy load is normal, first connect the transmitter outputs 1, 2, 3, and 4 to the load 1, 2, 3, and 4 respectively through cables, and use an oscilloscope to connect the test terminals on the front panel in sequence; control the transmitter to operate at different angles and transmit beams to check the output frequency, power, and pulse parameters of the transmitter's 48-channel transducers, thereby assisting in locating and troubleshooting; in some cases, the transmitter cannot transmit at full power when connected to the transmitting array, and the problem cannot be fully exposed, but connecting a dummy load allows full-power transmission, which better completes transmitter testing and maintenance.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention fills the gap in certain projects where dummy loads are not available. At any stage, the transmitter only needs to be connected to a single dummy load to check the transmitter's multiple (24-channel, 36-channel, 48-channel) transmission channels. The transmitter has multiple transmission power amplifiers, and each transmission participates in the transmission to form a transmission beam, driving the multi-channel transmission array transducer or load. The dummy load is small, light, easy to carry, and can be used on a boat, improving the convenience and efficiency of commissioning tests. The portable dummy load gives the transmitter the advantage of continuous transmission, shortening transmitter troubleshooting time, reducing the risk of transmitter damage, and improving equipment reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention after the side panels are removed;

[0028] Figure 2 Schematic diagram of the structure of the radiator in Example 1 of the present invention;

[0029] Figure 3 This is a schematic structural diagram of the top cover in Example 1 of the present invention;

[0030] Figure 4 This is a schematic structural diagram of Example 1 of the present invention;

[0031] Figure 5 This is a front schematic diagram of Example 1 of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of Example 2 of the present invention after the side panels are removed;

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

[0034] Figure 8 This is a front schematic diagram of Example 2 of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure of Example 3 of the present invention after the side panels are removed;

[0036] Figure 10 This is a schematic structural diagram of Example 3 of the present invention;

[0037] Figure 11 This is a schematic diagram of a side panel according to embodiment 3 of the present invention;

[0038] In the figure, 1. T-profile, 2. resistor module, 3. U-profile, 4. resistor, 5. heat dissipation module, 6. L-profile, 7. base U-profile, 8. cushioning foot pad, 9. left side panel, 10. connector, 11. right side panel, 12. handle. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] Example 1

[0041] Reference Figure 1-5 This embodiment takes a 24-channel portable transmitter dummy load as an example (with dimensions of 230mm*300mm*145mm and a weight of 6Kg), which mainly includes a resistor module 1, a heat dissipation module 2, a switching 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. Each heat sink has three resistors fixed to it using M3 hexagonal bolts, spaced 20 mm apart. The resistors and test terminals are connected in parallel to the conversion module. The resistors primarily absorb the power output by the transmitter.

[0043] The heat dissipation module 2 is mainly composed of 8 radiators, each of which is 230*70*25mm in size. A heat dissipation module is formed by a 300mm long support frame (T-profiles and L-profiles are distributed at equal intervals). It is mainly used to absorb the heat energy generated by the resistor and quickly conduct the heat energy away by utilizing the characteristics of the large tooth pitch of the heat dissipation block. Therefore, the main function of the heat dissipation module is to quickly dissipate heat and cool down.

[0044] Conversion module 3 mainly consists of connectors and cables. The cabinet-end connector matches the cabinet, and the load-end connector connects to the load. 9 loads are connected through the X1 socket, 9 loads are connected through the X2 socket, and 15 loads are connected through the X3 and X4 sockets respectively, realizing fast connection of all channels.

[0045] Test module 4 primarily consists of 48 test terminals, grouped in two groups (red and green), for a total of 24. 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 allows for checking the integrity of dummy loads and monitoring the output parameters of the transmitter's 24 power amplifiers.

[0046] The chassis module 5 primarily consists of four input connectors 17 (X1, X2, X3, and X4), six panels (top cover 15, front panel 16, left panel 17, right panel 18, bottom panel 19, and rear panel 20), a handle 10, a support block 6, and a 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, making it a truly portable dummy load.

[0047] Before using a dummy load, connect a multimeter and capacitance meter to the test terminals on the front panel of the dummy load to verify that the resistor and capacitor values ​​are within acceptable limits. After ensuring the dummy load is functioning properly, connect the transmitter's T-T1 cabinet's X7 and X8 terminals to the dummy loads X1 and X2, respectively, and the T-T2 cabinet's X6 and X7 terminals to the dummy loads X3 and X4, respectively. Then, connect the transmitter to a PC via an Ethernet cable and use an oscilloscope to connect the test terminals on the front panel in sequence. Use the PC to control the transmitter and check parameters such as the transmitter's 24 output channels, including frequency, power, and pulses, to locate any transmitter faults. Connecting the transmitter to the transmit array allows for single-shot operation, while connecting it to a dummy load allows for continuous transmission, facilitating transmitter testing and maintenance.

[0048] The portable dummy load of this embodiment is convenient to carry and to connect to a transmitter.

[0049] The portable dummy load of this embodiment is primarily used for transmitter testing and maintenance. It is an effective and simple 24-channel test tool. The transmitter is strictly prohibited from transmitting without a load. The transmitter must be connected to a transmitting array (meeting the water depth requirements) or a dummy load to actively transmit. Except for lake tests and navigation tests where the transmitter is connected to a transmitting array, all other tests must be connected to a dummy load. The dummy load is an indispensable supporting equipment for both indoor and outdoor field tests. Using this dummy load, testers can perform tasks such as transmitter self-tests in any situation, greatly reducing their workload 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 (with dimensions of 500mm*223mm*145mm and a weight of 9Kg), which mainly includes a resistor module 1, a heat dissipation module 2, a transfer module 3, a test module 4, and a chassis module 5.

[0052] The 36 resistors in resistor module 1 are installed vertically in six layers. Each heat sink has six resistors fixed to it using M3 hexagonal bolts, spaced 20 mm apart. The resistors and test terminals are connected in parallel to the conversion module. The resistors primarily absorb the power output by the transmitter.

[0053] The heat dissipation module 2 is mainly composed of 6 radiators, each of which is 460*70*25mm in size. A heat dissipation module is formed by a 230mm long support frame (T-profiles and L-profiles are evenly spaced). It is mainly used to absorb the heat energy generated by the resistor and quickly conduct the heat energy away by utilizing the characteristics of the large tooth pitch of the heat dissipation block. Therefore, the main function of the heat dissipation module is to quickly dissipate heat and cool down.

[0054] Conversion module 3 mainly consists of connectors and cables. The cabinet-end connector matches the cabinet, and the load-end connector connects to the load. 9 loads are connected through the X1 socket, 9 loads are connected through the X2 socket, and 15 loads are connected through the X3 and X4 sockets respectively, realizing fast connection of all channels.

[0055] Test module 4 primarily consists of 72 test terminals, grouped in two groups (red and green), for a total of 36. 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 allows for checking the integrity of dummy loads and monitoring the output parameters of the transmitter's 36 power amplifiers.

[0056] The chassis module 5 primarily consists of four input connectors 17 (X1, X2, X3, and X4), six panels (top cover, front panel, left panel, right panel, bottom panel, and rear panel), a handle, a support block, and a 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 and lightweight, making it easy to carry, making the dummy load truly portable.

[0057] Before using a dummy load, connect a multimeter and capacitance meter to the test terminals on the front panel of the dummy load to verify that the resistor and capacitor values ​​are within acceptable limits. After ensuring the dummy load is functioning properly, connect cables from transmitter T-C2 cabinet X7 and X8 to dummy loads X1 and X2, respectively. Then, connect the transmitter to a PC and, using an oscilloscope, connect the test terminals on the front panel in sequence. The PC controls the transmitter and checks parameters such as the transmitter's 36 output frequencies, power, and pulses, to locate transmitter faults. While the transmitter only operates in a single transmission when connected to the transmit array, connecting it to a dummy load allows for continuous transmission, facilitating transmitter testing and maintenance.

[0058] The portable dummy load of the present invention is convenient to carry and convenient to connect to a transmitter.

[0059] The portable dummy load of this embodiment is primarily used for transmitter testing and maintenance, and is an effective and simple 36-channel test tool. The transmitter is strictly prohibited from transmitting without a load. It can only actively transmit when connected to a transmitting array (meeting the required water depth) or a dummy load. Except for lake tests and navigation tests where the transmitter is connected to a transmitting array, a dummy load must be connected for all other tests. The dummy load is an indispensable accessory for both indoor and outdoor field tests. Using this dummy load, testers can perform tasks such as transmitter self-tests in any environment, significantly reducing their workload 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 (with dimensions of 500mm*300mm*145mm and a weight of 12Kg), which mainly includes a resistor module 1, a heat dissipation module 2, a transfer module 3, a test module 4, and a chassis module 5.

[0062] The 48 resistors in resistor module 1 are installed vertically in six layers. Six resistors are fixed to each heat sink using M3 hexagonal bolts, spaced 10 mm apart. The resistors and test terminals are connected in parallel to the conversion module. The resistors primarily absorb the power output by the transmitter.

[0063] The heat dissipation module 2 is mainly composed of 8 radiators, each of which is 460*70*25mm in size. A heat dissipation module is formed by a 300mm long support frame (T-profiles and L-profiles are evenly spaced). It is mainly used to absorb the heat energy generated by the resistor and quickly conduct the heat energy away by utilizing the characteristics of the large tooth pitch of the radiator heat dissipation block. Therefore, the main function of the heat dissipation module is to quickly dissipate heat and cool down.

[0064] Conversion module 3 is mainly composed of connectors and cables. The cabinet-end connector matches the cabinet, and the load-end connector connects to the load. 9 loads are connected through the 1# socket, 9 loads are connected through the 2# socket, and 15 loads are connected through the 3# and 4# sockets respectively, realizing fast connection of all channels.

[0065] Test module 4 primarily consists of 96 test terminals, grouped in two groups (red and black), for a total of 48. Resistors and test terminals are connected in parallel to the conversion module. The test module allows for checking the integrity of dummy loads and monitoring the output parameters of the transmitter's 48 power amplifiers.

[0066] Chassis Module 5 primarily consists of four input connectors (1#, 2#, 3#, and 4#), six panels (top cover, front panel, left panel, right panel, bottom panel, and rear panel), a handle, a support block, and a support block. The handle is attached to the top cover, and the support blocks are attached to the front and rear panels. The chassis module is compact and lightweight, making it easy to carry, making it a truly portable dummy load.

[0067] Before using the dummy load, use a multimeter and an insulation meter to connect the test terminals on the front panel of the dummy load to check that the resistance and insulation of the resistor are within the qualified range; after ensuring that the dummy load is normal, first connect the transmitter outputs 1, 2, 3, and 4 to the load 1, 2, 3, and 4 respectively through cables, and use an oscilloscope to connect the test terminals on the front panel in sequence; control the transmitter to operate at different angle beam transmissions to check the output frequency, power, and pulse parameters of the transmitter's 48-channel transducer, thereby assisting in locating and troubleshooting; in some cases, the transmitter cannot transmit at full power when connected to the transmitting array, and the problem cannot be fully exposed, but connecting a dummy load can transmit at full power, which better completes the transmitter testing and maintenance.

[0068] The portable dummy load in this embodiment is primarily used for transmitter testing and maintenance, and is an effective and simple 48-channel test tool. The transmitter is strictly prohibited from transmitting without a load. It can only be actively transmitted when connected to a transmitting array (meeting the required water depth) or a dummy load. Except for lake and navigation tests where the transmitter is connected to a transmitting array, a dummy load must be connected for all other tests. The dummy load is an indispensable accessory for both indoor and outdoor field testing. Using this dummy load, testers can perform tasks such as transmitter self-tests in any environment, significantly reducing their workload 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 variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-channel portable transmitter dummy load, characterized by: It includes a resistance module, a heat dissipation module, a test module, a connector, and a chassis module. The resistance module, heat dissipation module, and test module are installed in the chassis module. The resistance module, capacitance module, and test module are connected in parallel to the conversion module. The resistance module is used to absorb the electrical energy output by the transmitter and simulate the actual use environment of the transducer; The conversion module is connected to the transmitter via the chassis module, so that the multi-channel power amplifier output of the transmitter can be transferred 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 multi-channel power amplifier; The heat dissipation module is used to dissipate heat for the resistance module.

2. The multi-channel portable transmitter dummy load according to claim 1, characterized in that: The chassis module consists of an input connector, a frame, an upper cover, a base, a left side panel, a right side panel, a handle, a silent foot pad, and a support block. The handle is installed on the upper cover, the support block and the silent wheel are installed on the base, and the input connector is installed on the upper cover.

3. The multi-channel portable transmitter dummy load according to claim 2, characterized in that: The resistor module is composed of a plurality of resistors, the resistors are UXP250 planar 200Ω resistors, with a rated power of 250W, a rated temperature of less than 85 degrees, and a size of 70*60mm; It is installed inside the chassis module.

4. The multi-channel portable transmitter dummy load according to claim 3, characterized in that: The input connector is composed of a plurality of connectors, which are evenly arranged on both ends of the upper cover of the chassis module.

5. The multi-channel portable transmitter dummy load according to claim 4, characterized in that: The conversion module is composed of cables and connectors, which are 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 transferred to the resistance module.

6. The multi-channel portable transmitter dummy load according to claim 5, characterized in that: The test module consists of multiple test terminals, which are installed on the left and right panels. The test terminals are composed of 4mm pure copper banana head sockets, which can withstand 20A current shocks. The socket length is 28*10.5mm, and the protruding part is only 5mm, which can prevent human impact or mechanical impact; the resistors and test terminals on the terminal blocks are connected in parallel to the conversion module, and 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 an aluminum alloy profile, the upper part of the heat dissipation module is connected by two T-profiles, the size of the T-profile is 30*20*1.5mm, the lower part of the heat dissipation module is connected by two L-profiles, the size of the L-profile is 15*15*2mm, the upper cover is connected by a U-profile with a size of 100*20*2mm and an inner diameter of 96mm, the base is made of a U-profile with a size of 20*10*2mm and an inner diameter of 16mm, with a rubber foot pad with a size 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 a 24-channel portable transmitter dummy load, a 36-channel portable transmitter dummy load, and a 48-channel portable transmitter dummy load.

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 is composed of a 230*70*25mm aluminum alloy radiator, which is installed on the front and back of the chassis, and each side is composed of four radiators; the heat dissipation module of the 36-channel portable transmitter dummy load is composed of a 460*70*25mm aluminum alloy radiator, which is installed on the front and back of the chassis, and each side is composed of three radiators; the heat dissipation module of the 48-channel portable transmitter dummy load is composed of a 460*70*25mm aluminum alloy radiator, which is installed on the front and back of the chassis, and each side is composed of four radiators; when the dummy load is working continuously, the heat is dissipated to the resistor through the radiator, thereby protecting the resistor.

10. A method for operating a multi-channel portable transmitter dummy load as claimed in claim 8, characterized in that: The steps for installing a 24-channel portable transmitter dummy load are as follows: Before using the dummy load, use a multimeter and an insulation meter to connect the test terminals on the front panel of the dummy load to check that the resistor value and insulation are within the qualified range; after ensuring that the dummy load is normal, first select different angle beams of the transmitter through the cable to check the output frequency, power, and pulse parameters of the transmitter's multiple transducers, totaling 24 channels, to locate the transmitter fault; the transmitter can only transmit once when connected to the transmitting array, but it can transmit continuously when connected to the dummy load, which better completes the transmitter testing and maintenance; The steps for installing a 36-channel portable transmitter dummy load are as follows: Before using the dummy load, use a multimeter and an insulation meter to connect the test terminals on the front panel of the dummy load to check that the resistor value and insulation are within the qualified range; after ensuring that the dummy load is normal, first connect X7 and X8 of the transmitter T-C2 to X1 and X2 of the dummy load respectively through cables, and use an oscilloscope to connect the test terminals on the front panel in sequence; the PC controls the operation of the transmitter, and different angle beams are selected through operations on the PC application software to check the output frequency, power, and pulse parameters of the 36 channels and 180 transducers of the transmitter, thereby locating the transmitter fault; the transmitter can only transmit once when connected to the transmitting array, but it can transmit continuously when connected to the dummy load, which better completes the testing and maintenance of the transmitter; The steps for setting up a 48-channel portable transmitter dummy load are as follows: Before using the dummy load, use a multimeter and an insulation meter to connect the test terminals on the front panel of the dummy load to check that the resistor value and insulation are within the qualified range. After ensuring that the dummy load is functioning properly, connect the transmitter outputs 1, 2, 3, and 4 to the load terminals 1, 2, 3, and 4 respectively via cables, and use an oscilloscope to connect the test terminals on the front panel in sequence. Control the transmitter to transmit at different beam angles to check the output frequency, power, and pulse parameters of the transmitter's 48-channel transducers, thereby assisting in troubleshooting. In some cases, the transmitter connected to the transmitting array cannot transmit at full power and cannot fully expose the problem. However, connecting a dummy load can transmit at full power, which can better complete the testing and maintenance of the transmitter.

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