Multi-source data acquisition circuit of underwater signal acquisition equipment

Abstract

The utility model discloses a multi-source data acquisition circuit of underwater signal acquisition equipment, which comprises a main module MCU, a non-acoustic data sensor end, an acoustic signal acquisition end, a Bluetooth module and an auxiliary control circuit, and is characterized in that the non-acoustic data sensor end, the acoustic signal acquisition end, the Bluetooth module and the auxiliary control circuit are electrically connected with the main module MCU; the auxiliary control circuit is internally provided with a voltage detection circuit, a magnetic control switch circuit and a recovery positioning module, and the preamplifier is internally provided with a preamplifier circuit and a bias circuit. The multi-source data acquisition circuit of the underwater signal acquisition equipment integrates a plurality of sensors and is used for acquiring behavior and environment information; according to the system and the method, whale and guinea animal diving depth, real-time motion attitude, seawater temperature and the like can be detected, a multifunctional digital filter arranged in the chip can optimize acquisition work of whale and guinea animal sound signals, hardware circuit design is simplified, acquired data are comprehensive and reliable, and persuasion is high.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater signal acquisition equipment, in particular to a multi-source data acquisition circuit of underwater signal acquisition equipment. Background Art

[0002] As a self-contained underwater signal acquisition device, HEU-TAG cannot collect signals in real time. After recovery, the data needs to be transmitted back to the corresponding host device for human-computer interactive visualization operation. HEU-TAG is manually deployed and attached to the surface of the cetacean using a suction cup. It collects acoustic signals and sensor information while floating and sinking with the cetacean and records and stores them. After a period of acquisition, the nickel-chromium alloy is energized through the switch control circuit, causing electrochemical corrosion and causing the suction cup to fall off. The HEU-TAG body floats to the sea surface due to the built-in buoyancy material. At the same time, the switch circuit turns on the GPS positioning and VHF transmission module for equipment recovery. Finally, after the equipment is recovered, the manual switch turns on the Bluetooth transmission module to interconnect with the PC and realize data transmission.

[0003] However, traditional underwater signal acquisition equipment has the following disadvantages:

[0004] Traditional underwater signal acquisition equipment can only collect and sense underwater information from a single direction, and the collected data is not convincing. Utility Model Content

[0005] The purpose of the present invention is to provide a multi-source data acquisition circuit for underwater signal acquisition equipment to solve the problem proposed in the above background technology that traditional underwater signal acquisition equipment can only collect and sense underwater information from a single direction and the collected data is not convincing.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multi-source data acquisition circuit of an underwater signal acquisition device, comprising a main module MCU, a non-acoustic data sensor end, an acoustic signal acquisition end, a Bluetooth module and an auxiliary control circuit, wherein the non-acoustic data sensor end, the acoustic signal acquisition end, the Bluetooth module and the auxiliary control circuit are all electrically connected to the main module MCU, the auxiliary control circuit is provided with a voltage detection circuit, a magnetically controlled switch circuit and a recovery and positioning module, the acoustic signal acquisition end is provided with a hydrophone, a preamplifier and an AD analog-to-digital conversion module, and the preamplifier is provided with a preamplifier circuit and a bias circuit.

[0007] Preferably, the preamplifier circuit includes capacitor C46, ​​resistor R64, resistor R10, integrated circuit U19, resistor R6, resistor R12, resistor R13, capacitor C45, resistor R11 and amplifier U6.1, the 7-pin of the amplifier U6.1 is respectively connected to one end of the resistor R10 and one end of the capacitor C45, the other end of the capacitor C45 is connected to one end of the resistor R11, the 6-pin of the amplifier U6.1 is respectively connected to the other end of the resistor R10 and one end of the resistor R64, the other end of the resistor R64 is connected to one end of the capacitor C46, ​​the other end of the capacitor C46 is connected to the 2-pin of the integrated circuit U19, the 5-pin of the amplifier U6.1 is connected to one end of the resistor R6, one end of the resistor R12 and one end of the resistor R13 are both connected to SIGNAL AD, and the other end of the resistor R11 and the 1-pin of the integrated circuit U19 are both grounded.

[0008] Preferably, the bias circuit includes resistor R9, capacitor C48, capacitor C49, resistor R7, resistor R8, amplifier U6.2 and capacitor C47, the 2-end pin of the amplifier U6.2 and the 1-end pin of the amplifier U6.2 are both connected to one end of the capacitor C47, the 3-end pin of the amplifier U6.2 are respectively connected to one end of the resistor R7 and one end of the resistor R8, the other end of the resistor R7 is respectively connected to the 8-end pin of the amplifier U6.2 and one end of the capacitor C49, the connection between the capacitor C49 and the resistor R7 is respectively connected to one end of the resistor R9 and one end of the capacitor C48, the other end of the capacitor C47, the other end of the resistor R8, the 4-end pin of the amplifier U6.2, the other end of the capacitor C49 and the other end of the capacitor C48 are all grounded.

[0009] Preferably, the voltage detection circuit includes a resistor R21, a resistor R24, a resistor R67, a resistor R66, a resistor R65, a capacitor C12 and an amplifier U20, the 6-terminal pins of the amplifier U20 are respectively connected to one end of the resistor R66 and one end of the resistor R65, the other end of the resistor R65 is connected to one end of the capacitor C12, the other end of the resistor R66 is connected to the 2-terminal pins of the amplifier U20, the 3-terminal pins of the amplifier U20 are connected to one end of the resistor R67, the other end of the resistor R67 is respectively connected to one end of the resistor R21 and one end of the resistor R24, and the other end of the capacitor C12 and the other end of the resistor R24 ​​are both grounded.

[0010] Preferably, the recovery positioning module includes an integrated circuit U1, a resistor R3 and a resistor R2, the 20 pin of the integrated circuit U1 is connected to one end of the resistor R3, the 44 pin of the integrated circuit U1 is connected to one end of the resistor R2, the other end of the resistor R3, the other end of the resistor R2, and the 47 pin of the integrated circuit U1; the 35 pin of the integrated circuit U1 and the 8 pin of the integrated circuit U1 are both grounded.

[0011] Preferably, the main module MCU includes an integrated circuit U6, a resistor R52, a capacitor C34, a resistor R57, a resistor R58, a capacitor C29, a capacitor CAP, a capacitor C35, BT1, a resistor R32 and a capacitor C33, the 20-pin of the integrated circuit U6 is connected to one end of the resistor R52, the 6-pin of the integrated circuit U6 is connected to one end of BT1, the 94-pin of the integrated circuit U6 is connected to one end of the resistor R32, one end of the capacitor C34 and one end of the capacitor C35 are both connected to 3V3, one end of the resistor R57 and one end of the resistor R58 are both connected to SIGNAL-AD2, one end of the capacitor C29, one end of the capacitor CAP, the other end of the resistor R52, the 19-pin of the integrated circuit U6, the other end of BT1, the 99-pin of the integrated circuit U6, the other end of the resistor R32, the 74-pin of the integrated circuit U6 and the 49-pin of the integrated circuit U6 are all grounded.

[0012] Preferably, the non-acoustic data sensor end is provided with a magnetometer, a gyroscope, an accelerometer, a water temperature sensor and a pressure sensor.

[0013] Compared with the existing technology, the beneficial effects of the utility model are: the circuit integrates multiple sensors for collecting behavioral and environmental information, such as the diving depth of cetaceans, real-time movement posture and seawater temperature. A multifunctional digital filter built into the chip can optimize the collection of cetacean call signals, simplify the hardware circuit design, and the collected data is comprehensive, reliable and highly convincing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a circuit diagram of the preamplifier circuit of the utility model;

[0016] Figure 3 A circuit diagram of the bias circuit of the utility model;

[0017] Figure 4 This is a circuit diagram of the voltage detection circuit of the utility model;

[0018] Figure 5 This is a circuit diagram of the recovery and positioning module of the utility model;

[0019] Figure 6 This is the circuit diagram of the main module MCU of the utility model.

[0020] In the figure: 1. Main module MCU; 2. Bluetooth module; 3. Auxiliary control circuit; 31. Voltage detection circuit; 32. Magnetic control switch circuit; 33. Recovery positioning module; 4. Non-acoustic data sensor end; 41. Magnetometer; 42. Gyroscope; 43. Accelerometer; 44. Water temperature sensor; 45. Pressure sensor; 5. Acoustic signal acquisition end; 51. Hydrophone; 52. Preamplifier; 521. Preamplifier circuit; 522. Bias circuit; 53. AD analog-to-digital conversion module. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] See also Figure 1-6 The utility model provides a multi-source data acquisition circuit of an underwater signal acquisition device, including a main module MCU1, a non-acoustic data sensor terminal 4, an acoustic signal acquisition terminal 5, a Bluetooth module 2 and an auxiliary control circuit 3. The non-acoustic data sensor terminal 4, the acoustic signal acquisition terminal 5, the Bluetooth module 2 and the auxiliary control circuit 3 are all electrically connected to the main module MCU1. The auxiliary control circuit 3 is provided with a voltage detection circuit 31, a magnetic control switch circuit 32 and a recovery and positioning module 33. The acoustic signal acquisition terminal 5 is provided with a hydrophone 51, a preamplifier 52 and an AD analog-to-digital conversion module 53. The preamplifier 52 is provided with a preamplifier circuit 521 and a bias circuit 522.

[0023] The preamplifier circuit 521 includes capacitor C46, ​​resistor R64, resistor R10, integrated circuit U19, resistor R6, resistor R12, resistor R13, capacitor C45, resistor R11 and amplifier U6.1. Pin 7 of amplifier U6.1 is respectively connected to one end of resistor R10 and one end of capacitor C45, and the other end of capacitor C45 is connected to one end of resistor R11. Pin 6 of amplifier U6.1 is respectively connected to the other end of resistor R10 and one end of resistor R64, the other end of resistor R64 is connected to one end of capacitor C46, ​​and the other end of capacitor C46 is connected to pin 2 of integrated circuit U19. Pin 5 of amplifier U6.1 is connected to one end of resistor R6, one end of resistor R12 and one end of resistor R13 are both connected to SIGNAL AD, and the other end of resistor R11 and pin 1 of integrated circuit U19 are both grounded.

[0024] The bias circuit 522 includes resistor R9, capacitor C48, capacitor C49, resistor R7, resistor R8, amplifier U6.2 and capacitor C47. Pin 2 of amplifier U6.2 and pin 1 of amplifier U6.2 are both connected to one end of capacitor C47, pin 3 of amplifier U6.2 are respectively connected to one end of resistor R7 and one end of resistor R8, the other end of resistor R7 is respectively connected to pin 8 of amplifier U6.2 and one end of capacitor C49, the connection between capacitor C49 and resistor R7 is respectively connected to one end of resistor R9 and one end of capacitor C48, the other end of capacitor C47, the other end of resistor R8, pin 4 of amplifier U6.2, the other end of capacitor C49 and the other end of capacitor C48 are all grounded.

[0025] The voltage detection circuit 31 includes a resistor R21, a resistor R24, a resistor R67, a resistor R66, a resistor R65, a capacitor C12 and an amplifier U20. The 6-terminal pins of the amplifier U20 are respectively connected to one end of the resistor R66 and one end of the resistor R65, the other end of the resistor R65 is connected to one end of the capacitor C12, the other end of the resistor R66 is connected to the 2-terminal pins of the amplifier U20, the 3-terminal pins of the amplifier U20 are connected to one end of the resistor R67, the other end of the resistor R67 is respectively connected to one end of the resistor R21 and one end of the resistor R24, and the other end of the capacitor C12 and the other end of the resistor R24 ​​are both grounded.

[0026] The recovery positioning module 33 includes an integrated circuit U1, a resistor R3 and a resistor R2. The 20-pin of the integrated circuit U1 is connected to one end of the resistor R3, the 44-pin of the integrated circuit U1 is connected to one end of the resistor R2, the other end of the resistor R3, the other end of the resistor R2, and the 47-pin of the integrated circuit U1; the 35-pin of the integrated circuit U1 and the 8-pin of the integrated circuit U1 are both grounded.

[0027] The main module MCU1 includes an integrated circuit U6, a resistor R52, a capacitor C34, a resistor R57, a resistor R58, a capacitor C29, a capacitor CAP, a capacitor C35, BT1, a resistor R32 and a capacitor C33. Pin 20 of the integrated circuit U6 is connected to one end of the resistor R52, pin 6 of the integrated circuit U6 is connected to one end of BT1, pin 94 of the integrated circuit U6 is connected to one end of the resistor R32, one end of the capacitor C34 and one end of the capacitor C35 are both connected to 3V3, one end of the resistor R57 and one end of the resistor R58 are both connected to SIGNAL-AD2, one end of the capacitor C29, one end of the capacitor CAP, the other end of the resistor R52, pin 19 of the integrated circuit U6, the other end of BT1, pin 99 of the integrated circuit U6, the other end of the resistor R32, pin 74 of the integrated circuit U6 and pin 49 of the integrated circuit U6 are all grounded.

[0028] The non-acoustic data sensor end 4 is provided with a magnetometer 41 , a gyroscope 42 , an accelerometer 43 , a water temperature sensor 44 and a pressure sensor 45 .

[0029] When the embodiment of the present application is in use: In terms of the device of the preamplifier circuit 521, this device uses RS8752 with low power consumption, low noise, low supply voltage, high bandwidth gain product and rail-to-rail output. In terms of amplification, this device uses negative feedback amplification, which offers advantages such as high op amp performance, a stable static operating point, and low nonlinear distortion. Bias circuit 522 uses a single power supply to simplify the power supply circuit due to the recorder's high battery requirements. The A / D sampling module cannot receive negative signals, so a DC bias is required. For this purpose, a 1.65V DC bias circuit is designed for this purpose. To minimize signal distortion, a resistor divider is used, inputting the DC bias voltage to the reference voltage pin of the same operational amplifier chip, RS5837. The nine-axis accelerometer module is primarily used to record nine-axis acceleration and magnetic field information for later data processing to map the movement trajectory of cetaceans. This device uses the JY901 nine-axis accelerometer, which integrates a high-precision geomagnetic field sensor, an accelerometer 43, and a gyroscope 42. The module operates from a 3.3V-5V voltage and is pin-compatible with 3.3V / 5V embedded systems, making it easy to connect. It supports both serial and IIC data interfaces, with a maximum data output rate of 200Hz, adjustable from 0.1 to 200Hz. A pressure sensor 45 is used to record underwater pressure. This pressure data can be used to measure water depth and determine whether cetaceans are in a resting state and floating on the water surface, facilitating the recording of GPS data when the device is exposed to the water. This device uses the MS5837-30BA pressure sensor 45, which is connected to the STM32U575 microcontroller via the I2C interface. The MS5837-30BA pressure sensor 45 provides high-precision 24-bit pressure and temperature digital outputs. The high-resolution temperature output can also function as a thermometer.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-source data acquisition circuit for underwater signal acquisition equipment, comprising a main module MCU (1), a non-acoustic data sensor terminal (4), an acoustic signal acquisition terminal (5), a Bluetooth module (2) and an auxiliary control circuit (3), characterized in that: The non-acoustic data sensor end (4), the acoustic signal acquisition end (5), the Bluetooth module (2) and the auxiliary control circuit (3) are all electrically connected to the main module MCU (1); the auxiliary control circuit (3) is provided with a voltage detection circuit (31), a magnetic control switch circuit (32) and a recovery positioning module (33); the acoustic signal acquisition end (5) is provided with a hydrophone (51), a preamplifier (52) and an AD analog-to-digital conversion module (53); the preamplifier (52) is provided with a preamplifier circuit (521) and a bias circuit (522).

2. The multi-source data acquisition circuit of the underwater signal acquisition device according to claim 1, characterized in that: The preamplifier circuit (521) includes a capacitor C46, ​​a resistor R64, a resistor R10, an integrated circuit U19, a resistor R6, a resistor R12, a resistor R13, a capacitor C45, a resistor R11 and an amplifier U6.1, wherein the 7-pin of the amplifier U6.1 is respectively connected to one end of the resistor R10 and one end of the capacitor C45, the other end of the capacitor C45 is connected to one end of the resistor R11, the 6-pin of the amplifier U6.1 is respectively connected to the other end of the resistor R10 and one end of the resistor R64, the other end of the resistor R64 is connected to one end of the capacitor C46, ​​the other end of the capacitor C46 is connected to the 2-pin of the integrated circuit U19, the 5-pin of the amplifier U6.1 is connected to one end of the resistor R6, one end of the resistor R12 and one end of the resistor R13 are both connected to SIGNAL AD, and the other end of the resistor R11 and the 1-pin of the integrated circuit U19 are both grounded.

3. The multi-source data acquisition circuit of the underwater signal acquisition device according to claim 1, characterized in that: The bias circuit (522) includes a resistor R9, a capacitor C48, a capacitor C49, a resistor R7, a resistor R8, an amplifier U6.2 and a capacitor C47, wherein the 2-terminal pin of the amplifier U6.2 and the 1-terminal pin of the amplifier U6.2 are both connected to one end of the capacitor C47, the 3-terminal pin of the amplifier U6.2 are respectively connected to one end of the resistor R7 and one end of the resistor R8, the other end of the resistor R7 is respectively connected to the 8-terminal pin of the amplifier U6.2 and one end of the capacitor C49, the connection point between the capacitor C49 and the resistor R7 is respectively connected to one end of the resistor R9 and one end of the capacitor C48, the other end of the capacitor C47, the other end of the resistor R8, the 4-terminal pin of the amplifier U6.2, the other end of the capacitor C49 and the other end of the capacitor C48 are all grounded.

4. The multi-source data acquisition circuit of the underwater signal acquisition device according to claim 1, characterized in that: The voltage detection circuit (31) includes a resistor R21, a resistor R24, a resistor R67, a resistor R66, a resistor R65, a capacitor C12 and an amplifier U20, wherein the 6-terminal pins of the amplifier U20 are respectively connected to one end of the resistor R66 and one end of the resistor R65, the other end of the resistor R65 is connected to one end of the capacitor C12, the other end of the resistor R66 is connected to the 2-terminal pins of the amplifier U20, the 3-terminal pins of the amplifier U20 are connected to one end of the resistor R67, the other end of the resistor R67 is respectively connected to one end of the resistor R21 and one end of the resistor R24, and the other end of the capacitor C12 and the other end of the resistor R24 ​​are both grounded.

5. The multi-source data acquisition circuit of the underwater signal acquisition device according to claim 1, characterized in that: The recovery positioning module (33) comprises an integrated circuit U1, a resistor R3 and a resistor R2, wherein the 20-pin of the integrated circuit U1 is connected to one end of the resistor R3, the 44-pin of the integrated circuit U1 is connected to one end of the resistor R2, the other end of the resistor R3, the other end of the resistor R2, and the 47-pin of the integrated circuit U1; the 35-pin of the integrated circuit U1 and the 8-pin of the integrated circuit U1 are both grounded.

6. The multi-source data acquisition circuit of the underwater signal acquisition device according to claim 1, characterized in that: The main module MCU (1) includes an integrated circuit U6, a resistor R52, a capacitor C34, a resistor R57, a resistor R58, a capacitor C29, a capacitor CAP, a capacitor C35, BT1, a resistor R32 and a capacitor C33, wherein the 20-pin of the integrated circuit U6 is connected to one end of the resistor R52, the 6-pin of the integrated circuit U6 is connected to one end of the BT1, the 94-pin of the integrated circuit U6 is connected to one end of the resistor R32, one end of the capacitor C34 and one end of the capacitor C35 are both connected to 3V3, one end of the resistor R57 and one end of the resistor R58 are both connected to SIGNAL-AD2, one end of the capacitor C29, one end of the capacitor CAP, the other end of the resistor R52, the 19-pin of the integrated circuit U6, the other end of the BT1, the 99-pin of the integrated circuit U6, the other end of the resistor R32, the 74-pin of the integrated circuit U6 and the 49-pin of the integrated circuit U6 are all grounded.

7. The multi-source data acquisition circuit of underwater signal acquisition equipment according to claim 1, characterized in that: The non-acoustic data sensor end (4) is provided with a magnetometer (41), a gyroscope (42), an accelerometer (43), a water temperature sensor (44), and a pressure sensor (45).

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