CN213367796U

CN213367796U - Low-cost underwater short-distance communication module

Info

Publication number: CN213367796U
Application number: CN202022790488.6U
Authority: CN
Inventors: 陶鋆耀
Original assignee: Hangzhou Sysjoint Information Technology Co ltd
Current assignee: Hangzhou Sysjoint Information Technology Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-06-04
Anticipated expiration: 2030-11-26

Abstract

The utility model provides a low-cost short distance communication module under water, the system includes central processing module, transmitting circuit, receiving and dispatching closed circuit, transducer and electrical unit, central processing module connects transmitting circuit and receiving circuit respectively, transmitting circuit and receiving circuit all close the circuit connection transducer through receiving and dispatching, electrical unit connects central processing module, transmitting circuit, receiving and dispatching closed circuit and transducer respectively. Compared with the prior art, the utility model discloses an underwater communication device based on ultrasonic transmission. The module connects the receiving and transmitting signals to the transducer through the same interface through the receiving and transmitting combined circuit, and is convenient and simple to use. This module has carried on the ultralow power consumption Arm Cortex-M4 MCU of taking FPU, and externally also accessible serial ports communication can directly use with other integrated circuit boards collocation, and the overall dimension is only 24mm 16mm, and is very small and exquisite, easily carries, does not produce the influence to the carrier at the operation activity under water basically.

Description

Low-cost underwater short-distance communication module

Technical Field

The utility model relates to an underwater communication technical field, in particular to low-cost short distance communication module under water.

Background

With the progress of science and technology, people explore the underwater world more and more frequently, so it is born to various communication equipment under water, and the ultrasonic communication module under water is frogman, underwater robot carries out the indispensable equipment of action and operation under water, receives more and more attention in fields such as military affairs and civilian, and more modulation and demodulation technique based on digital signal processing technique is applied to the voice communication field under water, can effectively reduce interference factors such as multipath effect and marine environment noise in the voice use under water, improves speech quality. However, the traditional underwater communication equipment adopts a split structure design, has large volume, high power consumption, single purpose and poor anti-interference capability, and cannot stably operate for a long time in a marine complex environment.

SUMMERY OF THE UTILITY MODEL

There is above defect to prior art, the utility model provides a low-cost short distance communication module under water as follows:

the technical scheme of the utility model is realized like this:

a low cost underwater short range communication module, the system comprising:

the central processing module is used for controlling each module circuit of the communication system and processing and analyzing data;

the central processing module sends a transmitting signal through the DAC circuit module, and the transmitting circuit amplifies the transmitting signal and outputs the amplified signal to a TX end of the receiving and transmitting combined circuit;

the receiving circuit adopts a double-T frequency-selecting network, performs frequency-selecting amplification on the received signal, and sends the signal to the central processing module for processing and analysis;

the receiving and transmitting combined circuit adopts a diode bridge circuit and comprises a TX end and an RX end, wherein the TX end and the RX end are arranged at two ends of the diode bridge circuit and are respectively connected with the diode bridge circuit through a capacitor C, and the TX end is connected with a transducer;

the transducer is used for converting the signals into different forms;

the power supply unit is used for supplying power to each circuit module in the system;

the central processing module is respectively connected with the transmitting circuit and the receiving circuit, the transmitting circuit and the receiving circuit are both connected with the transducer through the receiving and transmitting combined circuit, and the power supply unit is respectively connected with the central processing module, the transmitting circuit, the receiving and transmitting combined circuit and the transducer.

Preferably, the central processing module adopts an STM3L432KC single chip microcomputer MCU chip, the MCU chip is based on an Arm Cortex-M432 RISC core microcontroller, and the working frequency of the MCU chip is 80 MHz.

Preferably, the transmitting circuit comprises a front-end amplifying circuit unit and a rear-end frequency selecting unit, the front-end amplifying circuit unit is connected with the MCU chip through a DAC, the rear-end frequency selecting unit outputs to the transducer, and the front-end amplifying circuit unit adopts an OPA197 operational amplification chip.

Preferably, the dual-T frequency-selective network of the receiving circuit includes a low-pass filter and a high-pass filter, the low-pass filter is a T-type network including two resistors R and a capacitor 2C, and the high-pass filter is a T-type network including two capacitors C and a resistor R/2.

Preferably, the power supply unit includes a 3.3V-20V DC-DC boost circuit.

Compared with the prior art, the utility model discloses there is following beneficial effect:

the utility model discloses a low-cost short distance communication module under water is the underwater communication device based on ultrasonic transmission. The module consists of a receiving circuit, a transmitting circuit, an MCU control circuit and the like. The module connects the receiving and transmitting signals to the transducer through the same interface through the receiving and transmitting combined circuit, and is convenient and simple to use. The receiving circuit can perform frequency-selective amplification on specific frequency. This module has carried on the ultralow power consumption Arm Cortex-M4 MCU of taking FPU, and externally also accessible serial ports communication can directly use with other integrated circuit boards collocation, and the overall dimension is only 24mm 16mm, and is very small and exquisite, easily carries, does not produce the influence to the carrier at the operation activity under water basically.

Drawings

Fig. 1 is a system block diagram of the low-cost underwater short-range communication module of the present invention;

fig. 2 is a schematic circuit diagram of the transmitting circuit of the present invention;

fig. 3 is a schematic circuit diagram of the receiving circuit of the present invention;

fig. 4 is a schematic circuit diagram of the dual T frequency-selective network of the present invention;

fig. 5 is a schematic circuit diagram of the dual T frequency-selective network of the present invention;

fig. 6 is a schematic circuit diagram of the transceiver circuit of the present invention.

In the figure: the system comprises a central processing module 100, a transmitting circuit 200, a receiving circuit 300, a transceiving combination circuit 400, a transducer 500 and a power supply unit 600.

Detailed Description

The present invention will be described more fully and clearly with reference to the accompanying drawings, which are incorporated in and constitute a part of this specification.

As shown in fig. 1, a low cost underwater short range communication module, the system comprising:

a central processing module 100, wherein the central processing module 100 is used for controlling, processing and analyzing data of each module circuit of the communication system;

the transmitting circuit 200, the central processing module 100 sends out a transmitting signal through the DAC circuit module, and the transmitting circuit 200 amplifies the transmitting signal and outputs the amplified signal to the TX end of the transceiver circuit 400;

the receiving circuit 300 adopts a double-T frequency-selective network, performs frequency-selective amplification on the received signal, and sends the signal to the central processing module 100 for processing and analysis;

as shown in fig. 5, the transceiver circuit 400 adopts a diode bridge circuit, and includes a TX end and an RX end, where the TX end and the RX end are disposed at two ends of the diode bridge circuit and are respectively connected to the diode bridge circuit through a capacitor C, and the TX end is connected to a transducer 500;

a transducer 500 for converting signals into different forms;

the power supply unit 600 is used for supplying power to each circuit module in the system by the power supply unit 600;

the central processing module 100 is connected to the transmitting circuit 200 and the receiving circuit 300, the transmitting circuit 200 and the receiving circuit 300 are connected to the transducer 500 through the transceiving combining circuit 400, and the power supply unit 600 is connected to the central processing module 100, the transmitting circuit 200, the receiving circuit, the transceiving combining circuit 400 and the transducer 500.

Examples

The central processing module adopts an ultra-low power consumption STM3L432KC singlechip chip, the MCU is an ultra-low power consumption microcontroller based on a high-performance Arm Cortex-M432 bit RISC kernel, and the working frequency of the MCU is as high as 80 MHz. It also implements a full set of DSP instructions and a Memory Protection Unit (MPU), thereby enhancing the security of the application. The MCU chip has embedded high speed memory (up to 256KB flash, 64KB SRAM), a Quad SPI flash interface and connections to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix. The MCU chip embeds various protection mechanisms for the embedded flash memory and the SRAM: read protection, write protection, proprietary code read protection and firewall, providing a fast 12-bit ADC (5Msps), two comparators, an operational amplifier, two DAC channels, a low power RTC, a universal 32-bit timer, a 16-bit PWM timer dedicated to motor control, four universal 16-bit timers and two 16-bit low power timers.

As shown in fig. 2, the transmitting circuit includes a front-end amplifying circuit unit and a rear-end frequency selecting unit, the front-end amplifying circuit unit is connected to the MCU chip through the DAC, the rear-end frequency selecting unit outputs to the transducer, the front-end amplifying circuit unit adopts OPA197 operation amplification chip, the MCU chip outputs the transmitting signal through the on-chip DAC circuit module, the output signal is about 10Vrms after being amplified by the transmitting circuit, and the transmitting power is 100 mW.

As shown in fig. 3 and 4, the dual-T frequency-selective network of the receiving circuit includes a low-pass filter and a high-pass filter, the low-pass filter is a T-type network including two resistors R and a capacitor 2C, the high-pass filter is a T-type network including two capacitors C and a resistor R/2, both of the two filters use the characteristic that the capacitance reactance of the capacitor changes with the frequency to filter, and the values of R and C are properly selected, so that the required frequency signal can be effectively selected and the interference signal can be filtered.

As shown in fig. 6, the power supply unit includes a 3.3V-20V DC-DC boost circuit.

Synthesize the utility model discloses a can, the utility model discloses a low-cost short distance communication module under water is the underwater communication device based on ultrasonic transmission. The module consists of a receiving circuit, a transmitting circuit, an MCU control circuit and the like. The module connects the receiving and transmitting signals to the transducer through the same interface through the receiving and transmitting combined circuit, and is convenient and simple to use. The receiving circuit can perform frequency-selective amplification on specific frequency. This module has carried on the ultralow power consumption Arm Cortex-M4 MCU of taking FPU, and externally also accessible serial ports communication can directly use with other integrated circuit boards collocation, and the overall dimension is only 24mm 16mm, and is very small and exquisite, easily carries, does not produce the influence to the carrier at the operation activity under water basically.

Claims

1. A low cost underwater short range communication module, the system comprising:

the transducer is used for converting the signals into different forms;

2. The low-cost underwater short-distance communication module as claimed in claim 1, wherein said central processing module employs a model STM3L432KC single chip MCU chip, said MCU chip is based on a microcontroller with Arm Cortex-M432 bit RISC core, and its operating frequency is 80 MHz.

3. The low-cost underwater short-distance communication module according to claim 2, wherein the transmitting circuit includes a front-end amplifying circuit unit and a rear-end frequency selecting unit, the front-end amplifying circuit unit is connected with the MCU chip through the DAC, the rear-end frequency selecting unit outputs to the transducer, and the front-end amplifying circuit unit adopts an OPA197 operational amplifier chip.

4. The low cost underwater short distance communication module of claim 1 wherein the dual T frequency selective network of the receiving circuit includes a low pass filter which is a T-type network including two resistors R and a capacitor 2C, and a high pass filter which is a T-type network including two capacitors C and a resistor R/2.

5. The low cost underwater short range communication module of claim 1 in which the power supply unit includes a 3.3V-20V DC-DC boost circuit.