Suspended hydrophone array system

Abstract

The utility model belongs to the field of hydrophones, and particularly relates to a suspension hydrophone array system, which comprises a plurality of hydrophone detection devices, each hydrophone detection device comprises a suspension ball, two straight rods are arranged on two sides of the bottom of each suspension ball, and the end part of each straight rod is connected with a counterweight ball; a heavy block is arranged in the suspension ball and is connected with the top end in the suspension ball through a thin steel rope; the two sides of the suspension ball are each provided with a buckle connector, and the suspension ball is connected with a long rod through the buckle connectors and used for being connected with other suspension balls. A circuit board is arranged in the suspension ball, a circuit system is arranged on the circuit board, and a power supply in the circuit system is connected with a circuit charging interface formed in the suspension ball through a wire; the suspension ball is also provided with a sensitive element interface, and the hydrophone sensor is connected with a circuit system in the suspension ball through the sensitive element interface. The suspension balls suspend on the water surface, array type connection of the multiple suspension balls can be achieved, and installation and arrangement are convenient.

Description

Technical Field

[0001] The utility model belongs to the field of hydrophones, and more specifically, it is a suspended hydrophone array system. Background Art

[0002] A hydrophone is a transducer that utilizes the conductive properties of water and the principle of sound propagation to detect underwater sound and convert underwater sound signals into electrical signals. The acoustic principle is the basis of hydrophone technology. Sound is a mechanical wave, and the speed and propagation path of sound waves in water are affected by factors such as the density, temperature, and pressure of water. By utilizing the characteristics of sound wave propagation in water, a hydrophone can obtain information about underwater sound by detecting the propagation path and speed of sound waves. In underwater acoustic engineering, hydrophones, as acoustic sensors, have always occupied a very important position. Traditional hydrophones are only used as sensors, and usually, the analog signals output by the sensors (or after amplification) are directly transmitted and processed. However, the signals are vulnerable to interference from the length of the wires and external environmental noise during transmission. In addition, existing hydrophones are fixed by equipment, which is not conducive to installation and layout. Summary of the Utility Model

[0003] In view of the above technical problems, the utility model provides a suspended hydrophone array system.

[0004] The utility model is implemented as follows:

[0005] A suspended hydrophone array system includes a plurality of hydrophone detection devices. Each hydrophone detection device includes a floating ball. Two straight rods are arranged on both sides of the bottom of the floating ball, and a counterweight ball is connected to the end of each straight rod. A heavy block is arranged inside the floating ball, and the heavy block is connected to the top end inside the floating ball through a thin steel cable. A snap-in interface is arranged on each side of the floating ball, and a long rod is connected through the snap-in interface to be connected to other floating balls. A circuit board is arranged inside the floating ball, and a circuit system is arranged on the circuit board. The power supply in the circuit system is connected to a circuit charging interface arranged on the floating ball through a wire. A sensitive element interface is also arranged on the floating ball, and a hydrophone sensor is connected to the circuit system inside the floating ball through the sensitive element interface.

[0006] Further, the inside of the floating ball is hollow to provide buoyancy for the entire device.

[0007] Further, the heavy block is a solid metal ball.

[0008] Further, an antenna bracket is installed on the top of the floating ball, and a zigbee module is arranged on the antenna bracket.

[0009] Further, the system further includes: a host system disposed remotely and a slave system disposed within the floating ball; the host system includes a CH340 driver circuit and a zigbee module of the host system; the slave system includes: a hydrophone sensor, an operational amplifier circuit, a fourth-order low-pass filter circuit, and an AD conversion circuit connected in sequence for input and output. The output end of the AD conversion circuit is connected to the first SPI interface of the microcontroller STM32 single-chip microcomputer, and the microcontroller STM32 single-chip microcomputer is connected to the zigbee module of the slave system through a serial port;

[0010] The input end of the CH340 driver circuit is connected to the zigbee module of the host system, and the output end of the CH340 driver circuit is connected to a computer through a usb interface.

[0011] Further, the microcontroller STM32 single-chip microcomputer further includes a second SPI interface, and the second SPI interface is connected to an oled screen.

[0012] Further, the hydrophone sensor is a piezoelectric ceramic type sensor.

[0013] Further, the operational amplifier circuit uses a dual-channel operational amplifier of model LM358;

[0014] The fourth-order low-pass filter circuit includes a Butterworth type low-pass filter circuit based on the operational chip AE5532;

[0015] The AD conversion circuit uses a 16-bit ADC module based on AD7606;

[0016] The oled screen is a 12864 screen with a seven-pin SPI communication method;

[0017] The model of the zigbee communication module is DL-22, and the transmission power is 20dbm;

[0018] The CH340 driver circuit is a transfer chip for the USB bus.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] This new type floats on the water surface through a floating ball, and multiple floating balls can be connected in an array. The set floating ball structure places the ZigBee module at a certain height above the water surface through an antenna, and the circuit system is set inside the floating ball, which can protect the circuit from damage. This structure is convenient for layout and forming an array structure. The adopted circuit system can enable the host system to collect data collected by the hydrophone sensor wirelessly, making it more convenient for the host system to receive the underwater acoustic signal, reducing the attenuation and interference of the underwater acoustic signal collected by the hydrophone sensor, improving the data accuracy of the hydrophone, and thus enabling the computer to better receive accurate underwater acoustic signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is a schematic structural diagram of the floating ball provided by an embodiment of the present invention;

[0022] Figure 2 FIG. is a principle block diagram of the slave system provided by an embodiment of the present invention;

[0023] Figure 3 FIG. is a circuit schematic diagram of the fourth-order low-pass filter circuit conversion circuit provided by an embodiment of the present invention;

[0024] Figure 4 FIG. is a circuit schematic diagram of the microcontroller STM32 single-chip microcomputer provided by an embodiment of the present invention;

[0025] Figure 5 FIG. is a circuit schematic diagram of the operational amplifier circuit provided by an embodiment of the present invention;

[0026] Figure 6 FIG. is a circuit schematic diagram of the CH340 drive circuit provided by an embodiment of the present invention;

[0027] Figure 7 FIG. is a circuit schematic diagram of the OLED screen provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] See Figure 1As shown in the figure, a suspended hydrophone array system includes multiple hydrophone detection devices. Each hydrophone detection device includes a suspended ball 1. On both sides of the bottom of the suspended ball, there are two straight rods, and a counterweight ball 8 is connected to the end of each straight rod. Inside the suspended ball 1, there is a heavy block 5, and the heavy block is connected to the top end inside the suspended ball through a thin steel cable 4. On both sides of the suspended ball, there is a snap interface 6 each, and a long rod is connected through the snap interface 6 for connecting to other suspended balls. Inside the suspended ball, there is a circuit board 7, and a circuit system is arranged on the circuit board. The power supply in the circuit system is connected to a circuit charging interface 3 arranged on the suspended ball through a wire. A sensitive element interface is also arranged on the suspended ball, and a hydrophone sensor 9 is connected to the circuit system inside the suspended ball through the sensitive element interface.

[0030] Among them, the inside of the suspended ball is hollow, and devices such as a circuit board are placed inside, mainly providing buoyancy for the entire device so that it can float on the water surface.

[0031] There is a counterweight ball on each side, providing a downward gravity. When the suspended ball tilts, the gravity of the counterweight ball will correct its posture and always keep its antenna perpendicular to the water surface.

[0032] The heavy block is a solid metal ball, connected to the top of the suspended ball through a metal thin iron chain, playing a physical damping role. When there are waves on the water surface, the inertia of the heavy block will prevent the suspended ball from following the water waves, making the suspended ball float more stably on the water surface.

[0033] An antenna bracket is installed on the top of the suspended ball, and a zigbee module 2 is arranged on the antenna bracket, which can reduce the shielding of electromagnetic wireless signals by water waves.

[0034] See Figure 2 As shown in the figure, the system further includes: a host system arranged at the remote end and a slave system arranged inside the suspended ball; the host system includes a CH340 drive circuit and a zigbee module of the host system; the slave system includes: a hydrophone sensor, an operational amplifier circuit, a fourth-order low-pass filter circuit, and an AD conversion circuit connected in sequence for input and output. The output end of the AD conversion circuit is connected to the first SPI interface of the microcontroller STM32 single-chip microcomputer, and the microcontroller STM32 single-chip microcomputer is connected to the zigbee module of the slave system through a serial port; the circuit of the microcontroller STM32 single-chip microcomputer is shown in Figure 4 shown in the figure.

[0035] The input end of the CH340 drive circuit is connected to the zigbee module of the host system, and the output end of the CH340 drive circuit is connected to a computer through a usb interface.

[0036] Multiple slave systems transmit signals to the host system through the ZigBee modules of the slave systems via a wireless network, and transfer the data of each slave to the host in real time.

[0037] The microcontroller STM32 single-chip microcomputer also includes a second SPI interface, and the second SPI interface is connected to the OLED screen.

[0038] The hydrophone sensor is a piezoelectric ceramic type sensor. The piezoelectric ceramic scalar hydrophone sensor is used to convert the mechanical physical signal of underwater acoustic vibration into an electrical signal that can be recognized by the circuit.

[0039] The operational amplifier circuit uses a dual-channel operational amplifier of model LM358, see Figure 5 as shown; the operational amplifier circuit has the advantages of being unaffected by DC bias and having strong common-mode interference resistance. It is used to amplify the input signal so that the output signal has a larger amplitude than the input signal.

[0040] The fourth-order low-pass filter circuit includes an operational chip which is a Butterworth low-pass filter circuit based on AE5532; it is used to filter out high-frequency irrelevant noise.

[0041] The AD conversion circuit uses a 16-bit ADC module based on AD7606, which is used to convert the voltage analog signal into a digital signal;

[0042] The OLED screen is a 12864 screen with a seven-pin SPI communication method, see Figure 6 as shown;

[0043] The ZigBee communication module is of model DL-22 and has a transmitting power of 20 dbm;

[0044] The CH340 drive circuit is a transfer chip for the USB bus, see Figure 7 as shown.

[0045] In this embodiment, see Figure 3 as shown, the low-pass filter is a second-order Butterworth low-pass filter. One end of the resistor R1 is connected to the ground, and the other end is connected to the negative input terminal of the operational amplifier chip. One end of the resistor R2 is connected to the negative input terminal of the operational amplifier chip, and the other end is connected to the output terminal. Its function is for inverting amplification, and the formula for the output voltage = - input voltage * (1 + R2 / R1), to achieve secondary voltage inverting amplification. One end of the resistor R3 is connected to the output terminal of the operational amplifier circuit, and the other end is connected to the resistor R4. The other end of the resistor R4 is connected to the positive input terminal of the operational amplifier chip. The capacitor C1 is connected to the resistor R3 and the resistor R4, and the other end is connected to the output terminal of the operational amplifier chip. The capacitor C2 is connected to the positive input terminal of the operational amplifier chip and the other end is connected to the ground, and the cut-off frequency f = 1 / (2π√R3R4C1C2).

[0046] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A suspended hydrophone array system, characterized in that, It includes multiple hydrophone detection devices. Each hydrophone detection device includes a floating ball. On both sides of the bottom of the floating ball, there are two straight rods, and a counterweight ball is connected to the end of each straight rod. Inside the floating ball, there is a heavy block, and the heavy block is connected to the top end inside the floating ball through a thin steel cable. On both sides of the floating ball, there is a snap interface each, and a long rod is connected through the snap interface for connection with other floating balls. Inside the floating ball, there is a circuit board, and a circuit system is arranged on the circuit board. The power supply in the circuit system is connected to a circuit charging interface arranged on the floating ball through a wire. On the floating ball, there is also a sensitive element interface, and a hydrophone sensor is connected to the circuit system inside the floating ball through the sensitive element interface.

2. The suspended hydrophone array system according to claim 1, wherein The inside of the floating ball is hollow, providing buoyancy for the whole device.

3. The suspended hydrophone array system according to claim 1, wherein The heavy block is a solid metal ball.

4. The suspended hydrophone array system according to claim 1, characterized in that, An antenna bracket is installed on the top of the floating ball, and a zigbee module is arranged on the antenna bracket.

5. The suspended hydrophone array system according to claim 1, characterized in that This system also includes: A host system arranged at the far end and a circuit system arranged inside the floating ball as a slave system; the host system includes a CH340 drive circuit and a zigbee module of the host system; the slave system includes: a hydrophone sensor, an operational amplifier circuit, a fourth-order low-pass filter circuit, and an AD conversion circuit that are connected in sequence for input and output. The output end of the AD conversion circuit is connected to the first SPI interface of the microcontroller STM32 single-chip microcomputer. The microcontroller STM32 single-chip microcomputer is connected to the zigbee module of the slave system through a serial port. The input end of the CH340 drive circuit is connected to the zigbee module of the host system, and the output end of the CH340 drive circuit is connected to a computer through a usb interface.

6. The suspended hydrophone array system according to claim 5, wherein The microcontroller STM32 single-chip microcomputer also includes a second SPI interface, and the second SPI interface is connected to an oled screen.

7. The suspended hydrophone array system according to claim 5, wherein The hydrophone sensor is a piezoelectric ceramic type sensor.

8. The floating hydrophone array system according to claim 6, wherein, The operational amplifier circuit uses a dual-channel operational amplifier of model LM358. The fourth-order low-pass filter circuit includes a Butterworth type low-pass filter circuit based on the operational chip AE5532. The AD conversion circuit uses a 16-bit ADC module based on AD7606. The oled screen is a 12864 screen with a seven-pin SPI communication method. The zigbee module model is DL-22, and the transmission power is 20dbm. The CH340 drive circuit is a USB bus transfer chip.

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