Load simulation cabinet based on sonar

Abstract

The utility model relates to a simulated load cabinet based on sonar, the load cabinet simulates the pure resistance state of a sonar acoustic array at a resonant frequency point, is convenient for debugging, maintenance and teaching, and comprises twelve groups of simulated load plug-in boxes, each simulated load plug-in box comprises four paths of simulated loads, the pure resistance value of each path of simulated load is about 127 ohms, and the pure resistance value of each path of simulated load is about 127 ohms. Meanwhile, a port on one side of the simulation load plug-in box is provided with a conversion interface board, and four current limiting circuits (to an indicating lamp) and four attenuation circuits to a BNC test port are integrated on the conversion interface board. According to the simulation load cabinet based on the sonar, under the condition that no acoustic array exists, each load in the simulation load cabinet is designed in a modularized mode, and debugging, maintenance and teaching of the sonar are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the debugging maintenance technology of sonar, especially point to a kind of based on sonar analog load machine cabinet. BACKGROUND

[0002] In the production process of certain sonar in present stage, an extremely simple analog load tool is used, ceramic tube resistance is used, and heat dissipation is slow;More than ten axial flow fans are installed on one side for ceramic tube resistance heat dissipation, and noise is large when working;Power amplifier output measuring point is installed on the other side, and oscilloscope needs to be connected with attenuator to measure power amplifier output voltage;Indicator light can only indicate whether power amplifier works;Its special installation process causes that the tool is basically unable to maintain.

[0003] Therefore, aiming at the shortcomings of original analog load tool, new device and new design are used, and analog load machine cabinet meeting debugging and maintenance requirements is redesigned. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the utility model provides an analog load machine cabinet based on sonar, the load machine cabinet simulates the pure resistance state of sonar sound base array at resonance frequency point, is convenient for debugging, maintenance and teaching, and includes twelve groups of analog load plug-in boxes, single analog load plug-in box contains four analog loads, the pure resistance value of each analog load is about 127Ω, the power acting on it is not greater than 500W, meanwhile, conversion interface board is arranged at the side port of analog load plug-in box, four current limiting circuits (to indicator light) and four attenuation circuits to BNC test port are integrated on the conversion interface board;

[0005] Aviation socket, the aviation socket is arranged at the power input end of multiple groups of analog load plug-in boxes, and is used for 48-way transmitting voltage input and AC220V power input;

[0006] BNC test port, the BNC test port is connected to the 100:1 attenuation circuit on the conversion interface board in the analog load plug-in box through the twisted shielded wire on the forty-eight-way transmitting voltage on the analog load;

[0007] Indicator light, the indicator light is provided with forty-eight, and is arranged on the side of load machine cabinet, and the number beside each indicator light corresponds to the analog load.

[0008] In an embodiment of the utility model, the analog load is 510Ω / 150W aluminum shell resistance, and two heat sinks are arranged on the heating end face of aluminum shell resistance, and the heat dissipation area of each heat sink meets two-way analog load.

[0009] In an embodiment of the utility model, the top and bottom of load cabinet are installed with two axial flow fans respectively, the heat sink and the heat dissipation fin of aluminum shell resistance are in the same direction, and the heat in the cabinet can be quickly dissipated under the action of axial flow fan.

[0010] In an embodiment of the utility model, the control port of the plurality of axial flow fans is provided with a temperature control circuit, and the power supply end of the temperature control circuit is connected with an aviation socket for power supply.

[0011] The above technical scheme of the utility model has the following advantages compared with the prior art: the sonar simulation load cabinet based on the utility model, without sound base array, utilizes the modular design of each load in the interior, meets the debugging, maintenance and teaching of sonar, wherein the high-power aluminum shell resistance simulates the pure resistance state of sound base array at the resonance frequency point; the double-ring layout of the indicator light can accurately and clearly indicate various working modes of sonar, and can clearly observe the specific number of power amplifier working in various working modes. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to make the content of the utility model more easily understood clearly, the utility model is further described in detail below according to the specific embodiments of the utility model and in combination with the drawings.

[0013] Figure 1 is the structure diagram of the utility based on sonar simulation load cabinet;

[0014] Figure 2 is the composition block diagram of the simulation load cabinet of the utility model;

[0015] Figure 3 is the schematic diagram of the simulation load in the plug-in box of the utility model;

[0016] Figure 4 is the position number arrangement schematic diagram of the indicator light of the utility model;

[0017] Figure 5 is the 100:1 attenuation circuit schematic diagram of the utility model;

[0018] Figure 6 is the layout diagram of the aviation socket of the utility model;

[0019] Figure 7 is the schematic diagram of the temperature control circuit of the utility model.

[0020] As shown in the figure, 1, simulation load plug-in box;11, simulation load;2, aviation socket;3, indicator light. DETAILED DESCRIPTION

[0021] As Figure 1 and Figure 2As shown, the embodiment provides a sonar simulation load cabinet, which simulates the pure resistance state of the sonar sound array at the resonance frequency point, facilitating debugging, maintenance and teaching, and comprising twelve groups of simulation load plug-in boxes, each of which contains four simulation loads;

[0022] Each simulation load plug-in box contains four simulation loads, each of which has a pure resistance of about 127Ω and a power of no more than 500W, which can be met by connecting four 510Ω / 150W aluminum shell resistors in parallel. The aluminum shell resistors are installed on two heat sinks, and two simulation loads are installed on each heat sink. Each simulation load plug-in box is installed with a conversion interface board, which integrates four current limiting circuits (to indicator lights) and four attenuation circuits to BNC test ports. The external view of the simulation load plug-in box is shown in Figure 3 .

[0023] The function of the aviation socket on the top of the cabinet is 48-way transmitting voltage input and AC220V power input. The aviation socket model and definition are shown in the following table, and the layout is shown in Figure 6 .

[0024] Aviation socket model and definition table

[0025]

[0026]

[0027] BNC test port: the 48-way transmitting voltage acting on the simulation load is attenuated by a 100:1 attenuation circuit (attenuation circuit schematic diagram as shown in Figure 5 ) on the conversion interface board in the simulation load plug-in box, and then connected to 48 BNC test ports through twisted shielded wires.

[0028] Indicator light: 48 indicator lights are arranged in a double ring (indicator light position arrangement schematic diagram as shown in Figure 4 ), which visually indicates the corresponding position of the 48-way power amplifier on the sound array. In different working modes, the corresponding indicator lights of the participating power amplifiers are lit.

[0029] Axial flow fan and temperature control circuit: when the simulation load cabinet is working, a large amount of heat will be generated, and two axial flow fans are installed on the top and bottom of the simulation load cabinet. The heat sinks and the heat dissipation fins of the aluminum shell resistors are in the same direction, and the heat in the cabinet can be quickly dissipated under the action of the axial flow fan. The temperature control circuit (schematic diagram as shown in Figure 7 ) is used to control the working of the axial flow fan. When the internal temperature of the cabinet rises to the set value (the temperature controller is set to 60℃), the AC220V axial flow fan is turned on to quickly dissipate the heat in the cabinet. When the internal temperature of the cabinet is lower than the set value, the AC220V axial flow fan is turned off to stop working, thereby achieving the effect of energy saving.

[0030] The load cabinet described in the embodiment is modularized for each load path inside, facilitating maintenance; high-power aluminum shell resistance is used to simulate the pure resistance state of the acoustic array at the resonance frequency point; the double-ring layout of the indicator light can accurately and clearly indicate various working modes of the sonar and clearly observe the specific path of the power amplifier working in various working modes; a 100:1 attenuation circuit is integrated in the simulation load plug-in box, and an oscilloscope can be directly used to measure the output voltage of each power amplifier on the simulation load cabinet; a temperature control circuit is installed inside the cabinet, when the internal temperature of the cabinet rises to the set value, the AC220V axial flow fan is turned on to work to quickly dissipate heat inside the cabinet, when the internal temperature of the cabinet is lower than the set value, the AC220V axial flow fan is turned off to stop working, so as to achieve the effect of energy saving.

[0031] Obviously, the above embodiments are only examples for clearly illustrating, and are not limitation to the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A sonar simulation load cabinet, which simulates the pure resistance state of the sonar array at the resonant frequency point, is convenient for debugging, maintenance and teaching, and is characterized by: The invention comprises twelve groups of simulated load plug-ins (1), wherein each of the simulated load plug-ins (1) comprises four simulated loads (11), and the pure resistance of each simulated load (11) is about 127Ω, and the power acting on the simulated load (11) is not greater than 500W. At the same time, a conversion interface board is provided at a port on one side of the simulated load plug-in box (1), on which a four-way current limiting circuit and a four-way attenuation circuit are integrated to a BNC test port; An aviation socket (2), wherein the aviation socket (2) is provided at a power input end of a plurality of groups of simulated load plug-in boxes (1); A BNC test port, the BNC test port is connected to a 100:1 attenuation circuit on a conversion interface board in a simulated load plug-in box (1) for forty-eight transmission voltages on a simulated load (11) through a twisted shielded pair cable; Indicator lights (3), there are 48 indicator lights (3), which are arranged on the side of the load cabinet, and the numbers arranged next to each indicator light (3) correspond to the simulated load (11).

2. The load cabinet of claim 1, wherein: The simulated load (11) is a 510Ω / 150W aluminum shell resistor, and two heat sinks are provided on the heating end surface of the aluminum shell resistor, and the heat dissipation area of ​​each heat sink meets the requirements of the two-way simulated load (11).

3. The load cabinet of claim 1, wherein: Two axial flow fans are installed on the top and bottom of the load cabinet, and the heat dissipation fins of the radiator and aluminum shell resistor are in the same direction as the air duct.

4. The load cabinet of claim 3, wherein: The control ports of the plurality of axial flow fans are provided with a temperature control circuit, and the power supply end of the temperature control circuit is connected to an aviation socket (2) for power supply.

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