CN114374410A - Power supply carrier communication module applied to underwater flexible towing system - Google Patents
Power supply carrier communication module applied to underwater flexible towing system Download PDFInfo
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Abstract
The invention discloses a power supply carrier communication module applied to an underwater flexible towing system, which comprises a main control circuit, a modulation and demodulation circuit and a carrier signal transmitting and receiving circuit, wherein the main control circuit and the carrier signal transmitting and receiving circuit are connected with the modulation and demodulation circuit, and the main control circuit is a system taking an STM32F103RCT6 single chip microcomputer as a core; the modulation and demodulation circuit comprises a carrier chip and a low-pass filter by ST7540, and the low-pass filter is connected with the carrier chip; the carrier signal transmitting and receiving circuit comprises a coupling transformer, a series resonance circuit and a parallel resonance circuit, wherein the series resonance circuit and the parallel resonance circuit are connected with the coupling transformer. The invention can realize synchronous power supply and communication among underwater equipment, does not need special communication cables, and can realize reliable communication under the channel environment with wide noise frequency band.
Description
Technical Field
The invention relates to a power supply carrier communication module, in particular to a power supply carrier communication module applied to an underwater flexible towing system, which is mainly used for power supply carrier communication of the underwater flexible towing system and belongs to the technical field of digital communication.
Background
Generally, the power supply carrier communication is mainly performed by using a power distribution line as a carrier for communication, and a communication method of the power supply carrier communication is frequently applied to a power system. Compared with the traditional communication mode, the communication line used by the power supply carrier communication can directly use the existing power supply line without additionally designing the communication line, and the current power supply carrier communication technology is mainly applied to electric power meter reading, remote control and the like. However, in the common carrier communication, data transmission is unstable, the carrier communication is easily limited by frequency spectrum in the information transmission process, the anti-interference performance is slightly poor, and most power supply carrier modules in the market have large volumes and are difficult to apply to occasions with high size requirements.
At present, in underwater towing equipment or experiments, such as an underwater vehicle towing system, flexible connection is performed between an underwater vehicle and a towing body, and power transmission and real-time communication are required to be performed between the underwater vehicle and the towing body. The diameter of the flexible cable and the number of cable cores have a significant influence on the volume, the fluid dynamics, the power consumption, etc. of the towing system.
Therefore, a power supply carrier communication module applied to an underwater flexible towing system, which can realize synchronous power supply and communication among underwater devices, does not need a special communication cable, and can realize reliable communication in a channel environment with a wide noise band, is a key point for solving the technical problems.
Disclosure of Invention
The invention aims to provide a power supply carrier communication module applied to an underwater flexible towing system, which is miniaturized, enhances the reliability and anti-interference of carrier information transmission, can realize synchronous power supply and communication among underwater equipment, does not need special communication cables, and can realize reliable communication under the channel environment with wide noise frequency band.
In order to solve the above problems and achieve the above object, the power supply carrier communication module applied to the underwater flexible towing system of the present invention is implemented by adopting the following design structure and the following technical scheme:
a power supply carrier communication module applied to an underwater flexible towing system comprises a main control circuit, a modulation and demodulation circuit and a carrier signal transmitting and receiving circuit, wherein the main control circuit and the carrier signal transmitting and receiving circuit are connected with the modulation and demodulation circuit,
the main control circuit is a system taking an STM32F103RCT6 singlechip as a core;
the modulation and demodulation circuit comprises a low-voltage power supply carrier chip ST7540 and a low-pass filter, and the low-pass filter is connected with the carrier chip;
the carrier signal transmitting and receiving circuit comprises a coupling transformer, a series resonance circuit and a parallel resonance circuit, wherein the series resonance circuit and the parallel resonance circuit are connected with the coupling transformer.
Preferably, the main control circuit comprises a power supply filtering unit, a crystal oscillator unit, a chip reset unit and a main control chip unit; wherein,
the crystal oscillator unit comprises a crystal oscillator matching capacitor C1, a matching capacitor C9, a matching resistor R6 and an 8M passive crystal oscillator G1, the crystal oscillator unit is used for providing reference frequency for the main control chip, and the crystal oscillator unit is connected with the 5 th pin and the 6 th pin of the main control chip;
the power supply filtering unit comprises C2, C5, C10 and C11 with the capacitance value of 0.1uF, and C3, C4, C6 and C12 with the capacitance value of 10uF, and is used for filtering and storing energy for VCC supplied to the main control chip, so that abnormal work caused by fluctuation of power supply voltage of the chip is prevented, and the power supply filtering unit is connected with VDD and VSS of the main control chip.
More preferably, the chip reset unit includes a resistor R8 with a resistance value of 10K Ω and a ceramic dielectric capacitor C21 with a capacitance value of 0.1uF, and the chip reset unit is used for providing a reset signal level for the main control chip during power-on initialization and is connected to the 7 th pin of the main control chip.
More preferably, the main control chip unit comprises an LED indicating lamp circuit consisting of H2 and R18 and an arm chip, and the model of the LED indicating lamp circuit is STM32F103RCT 6.
Preferably, the main control chip comprises the following tasks:
the SPI information receiving and analyzing device is used for receiving SPI information from the modulation and demodulation circuit, analyzing and sending the SPI information to the RS232 serial port communication circuit;
the system comprises a modulation and demodulation circuit, an SPI (serial peripheral interface) interface, a data processing module and a data processing module, wherein the modulation and demodulation circuit is used for receiving RS232 information from external communication equipment, analyzing and processing the information and then sending the information to the modulation and demodulation circuit through the SPI interface for modulation processing;
the pins 21, 22 and 23 of the main control chip unit are connected with the pins 4, 6 and 8 of the modulation and demodulation chip unit for SPI communication.
Preferably, the modulation and demodulation circuit comprises a low-pass power supply filtering unit and a modulation and demodulation chip unit; the low-pass filtering unit comprises resistors with the codes of R11, R13, R14, R15, R16 and R17 and capacitors with the codes of C26, C27, C28, C29 and C30, and is used for matching proper values; the low-pass filter unit is connected with a response pin of the modulation and demodulation chip.
More preferably, the modem chip unit includes a carrier chip ST7540 with code number U11, a pull-down resistor R29, R24, R27, R30, and C34, the pull-down resistor R29 is used to make the modem chip operate in SPI communication mode, ST7540 is an important device for modem, and is used to receive and demodulate information from a carrier power line, and send digital quantity information to the main control chip STM32F103 through an SPI communication line after processing; the SPI serial digital information from the STM32F103 is received, modulated and sent to a carrier communication line through a resonant circuit, and the modulation and demodulation unit is connected with the low-pass filter, the main control chip unit, the series resonant unit and the parallel resonant unit.
Preferably, the carrier signal transmitting and receiving circuit includes a coupling transformer voltage stabilizing unit, a series resonant unit, a parallel resonant unit and a clamp protection unit, wherein the coupling transformer voltage stabilizing unit includes a TVS transistor with a code V2 and a coupling transformer with a code L2, the TVS transistor is used for preventing a circuit module from being damaged due to static electricity or surge, and is used for protecting the circuit, the coupling transformer is used for isolating the received carrier signal, and the coupling transformer unit is connected with C22 and L1 of the series resonant circuit and L3 and C25 of the parallel resonant circuit.
More preferably, the co-resonant unit and the series resonant unit are connected by a coupling transformer L2, wherein,
the series resonance unit comprises a filter capacitor with the code number of C22 and an inductor with the code number of L1;
the parallel resonance unit comprises a capacitor with the code number of C25, an inductor with the code number of L3 and an R10 resistor, and the inductor and the capacitor are connected in parallel;
still more preferably, the clamp protection unit comprises diodes with the code numbers V1 and V3 and capacitors C23 and C24, and clamps the voltage of the signals PA _ OUT and RX _ IN the range of 0V-12V for avoiding the circuit damage caused by voltage fluctuation.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the existing power line carrier equipment module, the power line carrier equipment module has the characteristics of small volume, reliable communication and strong anti-interference performance, can be applied to specific environments with limited volume and high communication quality requirements, and can stably and reliably transmit information after being tested in an underwater flexible towing system;
2. the invention can fully utilize the existing power supply line resources, namely, the power supply line is utilized for communication, the information transmission is realized, and the invention has stable performance, reliable communication and high response speed. The modularized and miniaturized design enables the invention to be more flexible and convenient in use, can be used in various occasions with high environmental requirements, does not depend on special software and hardware platforms, does not limit the voltage value of a low-voltage power supply line, can be directly used on the low-voltage alternating-current and direct-current power supply lines, does not distinguish the positive and negative electrodes of the power supply line or a zero line and a live line, and achieves the purpose of communication by supplying power;
3. in the design of the control algorithm, the process-oriented and object-oriented combined control algorithm is adopted, so that high-efficiency, clear and reliable data processing and flow control can be realized, and the reliability and robustness of software are greatly improved;
4. the chip and the components selected by the circuit module are all miniaturized devices, the miniaturization of the module is realized through compact layout, and the volume of the module is 60mm x 22mm x 10mm, as shown in figure 2. The module can be installed in narrow space and occasions with high size requirements, and electromagnetic compatibility is improved through reasonable arrangement of devices. In the software design process, the high-speed, reliable communication and low error rate of the module are realized by designing the annular cache queue and verifying data;
5. the power transmission and communication of the underwater flexible towing system are realized by adopting a power supply carrier communication technology, the number of cable cores and the diameter of the cable can be reduced, and the power transmission and communication system has positive effects on the aspects of fluid power, power consumption and the like of the towing system;
6. the power supply carrier communication module is miniaturized, enhances the reliability and anti-interference performance of carrier information transmission, can realize synchronous power supply and communication among underwater equipment, does not need a special communication cable, and can realize reliable communication under the channel environment with wide noise frequency band;
7. the carrier communication module is miniaturized by reasonably designing the carrier circuit architecture, selecting proper main control chips, carrier chips and peripheral circuit components and compactly arranging. The device can be applied to certain specific occasions with limited volume, such as an underwater dragging system;
8. the invention enhances the reliability and the anti-interference performance of the carrier communication module from two aspects of hardware design and software design. In the aspect of hardware design, the hardware anti-interference performance of the communication module is enhanced through reasonable circuit design, reasonable component layout and reasonable selection of modulation and demodulation circuit parameters. In the aspect of software design, the communication reliability is improved by reasonably designing a software framework, increasing verification modes and the like.
Drawings
Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic illustration of carrier communication of the present invention;
fig. 2 is a diagram of a carrier communication module printed board of the present invention;
FIG. 3 is a schematic diagram of the master control circuit of the present invention;
FIG. 4 is a schematic diagram of a modem circuit of the present invention;
FIG. 5 is a schematic diagram of a carrier signal transmitting and receiving circuit of the present invention;
FIG. 6 is a software flow schematic block diagram of the present invention;
FIG. 7 is a block schematic diagram of a power supply carrier communication module of the present invention;
1-a main control circuit (1), 11-a power supply filtering unit, 12-a crystal oscillator unit, 13-a chip reset unit and 14-a main control chip unit;
2-modulation and demodulation circuit, 21-modulation and demodulation chip unit, 22-low-pass power supply filtering unit;
3-carrier signal transmitting and receiving circuit (3), 31-series resonance unit, 32-coupling voltage transformation and stabilization unit, 33-parallel resonance unit, 34-clamping protection unit.
Detailed Description
In order to make the technical means, the inventive features, the achievement purposes and the effects of the present invention easy to understand, the technical solutions of the present invention are further described in detail with reference to the drawings and the detailed description below, and it is to be noted that the embodiments and the features in the embodiments in the present application can be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Power supply carrier communication is realized among underwater flexibly connected equipment, namely 2-core watertight cables are used, reliable software and hardware design and efficient control algorithm are adopted, and a modularized and miniaturized design idea is adopted to design a small carrier module with strong portability.
A power supply carrier communication module applied to an underwater flexible towing system comprises a main control circuit, a modulation and demodulation circuit and a carrier signal transmitting and receiving circuit, wherein the main control circuit and the carrier signal transmitting and receiving circuit are connected with the modulation and demodulation circuit,
the main control circuit is a system taking an STM32F103RCT6 singlechip as a core;
the modulation and demodulation circuit comprises a low-voltage power supply carrier chip ST7540 and a low-pass filter, and the low-pass filter is connected with the carrier chip;
the carrier signal transmitting and receiving circuit comprises a coupling transformer, a series resonance circuit and a parallel resonance circuit, wherein the series resonance circuit and the parallel resonance circuit are connected with the coupling transformer.
The invention designs and manufactures a novel data transmission system based on a low-voltage power supply carrier communication chip. And the hardware is reasonably selected and designed, the module miniaturization is realized, the software is reasonably designed into a framework and a coding algorithm, and the communication reliability is improved. The method adopts an intentional semiconductor low-voltage power supply carrier chip ST7540, and takes an STMF103RCT6 type single chip microcomputer as a main control chip to realize the forwarding of communication data and the control of the carrier chip.
Specifically, as shown in fig. 3, the main control circuit includes four parts, namely a power filter unit, a crystal oscillator unit, a chip reset unit and a main control chip unit; the modulation and demodulation circuit comprises a low-pass filtering unit and a modulation and demodulation chip unit; the carrier signal transmitting and receiving circuit consists of a coupling voltage transformation and stabilization unit, a series resonance unit, a parallel resonance unit and a clamping protection unit.
The main control circuit, as shown in fig. 3, is a minimum system with an STM32F103RCT6 single chip microcomputer as a core, and includes a modulation and demodulation circuit, as shown in fig. 4, including an ST7540 carrier chip and a low-pass filter, and a carrier signal transmitting and receiving circuit, as shown in fig. 5, including a coupling transformer, a series resonant circuit, and a parallel resonant circuit.
As shown in fig. 7, the main control circuit, the modulation and demodulation circuit, and the carrier signal transmitting and receiving circuit. The key point for realizing high-quality and high-efficiency power supply carrier communication is that the modulation and demodulation circuit and the carrier signal transmitting and receiving circuit are used for filtering signals during data transmission, filtering certain noise such as second harmonic, and enabling the signals to have enough power to be coupled to a power supply line through a power amplifier; in data reception, noise mixed in a signal is filtered, the signal is amplified, and then the signal is transmitted to a modulation and demodulation circuit to be demodulated.
Modulation can be divided into analog modulation and digital modulation according to the form of the modulation signal, and digital modulation is used in the present invention. The digital modulation is to control the amplitude, frequency or phase of a carrier wave by using a digital signal so as to obtain amplitude keying (ASK), frequency keying (FSK) or phase keying (PSK), and the invention applies a frequency keying (FSK) modulation mode.
The crystal oscillator unit comprises a crystal oscillator matching capacitor C1, a matching capacitor C9, a matching resistor R6 and an 8M passive crystal oscillator G1, the crystal oscillator unit is responsible for providing reference frequency for the main control chip, and the crystal oscillator unit is connected with pins 5 and 6 of the main control chip.
The power supply filtering unit comprises C2, C5, C10 and C11 with the capacitance value of 0.1uF, and C3, C4, C6 and C12 with the capacitance value of 10uF, and is responsible for filtering and storing energy of VCC supplied to the main control chip, so that abnormal work caused by power supply voltage fluctuation of the chip is prevented. The power supply filtering unit is connected with VDD and VSS of the main control chip.
The chip reset unit comprises a resistor R8 with the resistance value of 10K omega and a ceramic dielectric capacitor C21 with the capacitance value of 0.1uF, and the chip reset unit is used for providing reset signal level for the main control chip during power-on initialization. The chip reset unit is connected with the 7 th pin of the main control chip.
The main control chip unit comprises an LED indicating lamp circuit consisting of H2 and R18 and an arm chip of Italian semiconductor corporation, and the model number of the main control chip unit is STM32F103RCT 6. The main control chip comprises the following tasks: the SPI information from the modulation and demodulation circuit is received, analyzed and sent to the RS232 serial port communication circuit; RS232 information from external communication equipment is received, analyzed and processed, and then sent to a modulation and demodulation circuit through an SPI for modulation processing; and an LED indicating lamp circuit is used for prompting necessary information. The 21 st, 22 nd and 23 th pins of the main control chip unit are connected with the 4 th, 6 th and 8 th pins of the modulation and demodulation chip unit for SPI communication.
The low-pass filter unit comprises resistors with the code numbers of R11, R13, R14, R15, R16 and R17 and capacitors with the code numbers of C26, C27, C28, C29 and C30 and is used for matching proper values, the low-pass filter unit forms a low-pass filter with good interference resistance, and as shown in FIG. 4, the low-pass filter unit is connected with a response pin of a modulation and demodulation chip.
The modulation and demodulation chip unit comprises a carrier chip ST7540 with the code number of U11, a pull-down resistor R29, R24, R27, R30 and C34, the pull-down resistor R29 enables the modulation and demodulation chip to work in an SPI communication mode, ST7540 is an important device for modulation and demodulation and is responsible for receiving and demodulating information from a carrier power line, and after processing, digital quantity information is sent to a main control chip STM32F103 through an SPI communication line; SPI serial digital information from the STM32F103 is received, modulated and sent to a carrier communication line through a resonant circuit. The modulation and demodulation unit is connected with the low-pass filter, the main control chip unit, the series resonance unit and the parallel resonance unit.
The modulation and demodulation circuit comprises a low-pass filtering unit and a modulation and demodulation chip unit; the carrier signal transmitting and receiving circuit comprises a coupling voltage transformation and stabilization unit, a series resonance unit, a parallel resonance unit and a clamping protection unit.
The coupling transformation voltage-stabilizing unit comprises a TVS (transient voltage suppressor) with the code number of V2 and a coupling transformer with the code number of L2, wherein the TVS is used for preventing a circuit module from being damaged due to static electricity or surge, the TVS plays a role in protecting a circuit, and the coupling transformer plays an isolation role in receiving carrier signals. The coupling transforming unit is connected with C22 and L1 of the series resonant circuit and L3 and C25 of the parallel resonant circuit.
The series resonance unit comprises a filter capacitor with the code number of C22 and an inductor with the code number of L1, and the series resonance frequency is the working frequency of the modulation and demodulation chip through proper selection, so that other clutter interference is filtered.
The parallel resonant unit comprises a capacitor with the code number of C25, an inductor with the code number of L3 and an R10 resistor. The inductor and the capacitor are connected in parallel, and the parallel resonance frequency is close to the working frequency of the modulation and demodulation chip through proper value selection. The impedance of the signal of the working frequency is maximum when the signal passes through the parallel resonant circuit, so that the aim of selecting the signal of the working frequency is fulfilled. The parallel resonance unit and the series resonance unit are connected by a coupling transformer L2.
The clamping protection unit comprises diodes with the code numbers of V1 and V3 and capacitors C23 and C24, clamps the voltage of signals PA _ OUT and RX _ IN IN the range of 0V-12V, and avoids the damage of a circuit caused by voltage fluctuation.
In the information receiving mode of the module, a carrier chip receives signals coupled from a power supply line in real time, signals of corresponding carrier frequencies are selected through a series resonant circuit and a parallel resonant circuit, the received signals are amplified and filtered, then the signals are sent to an STM32F103RCT6 single chip microcomputer through demodulation of the carrier chip ST7540, the single chip microcomputer verifies the received data in real time, the received data are analyzed and judged, the analyzed data are stored in an annular cache array, and the data are sent out through a serial port.
In the information sending mode of the module: the single chip microcomputer stores information data to be sent into the annular cache array, when communication on the power supply line is idle, the data are sent to the carrier chip in an SPI mode to be modulated, and the modulated signals are amplified and sent to the power supply line through the series resonance circuit.
The invention has compact structure, convenient wiring and transparent information transmission, can be applied to the field of underwater dragging information transmission, can also be widely applied to the fields of intelligent home and security protection, can be applied to a low-voltage direct-current power supply system, can also be applied to a 220V alternating-current commercial power supply network, and has wider application prospect.
In software design, efficient, clear and reliable data processing and process control are realized by adopting a control algorithm combining process orientation and object orientation. Specifically, serial data to be received and transmitted are put into a ring buffer queue, and the data are analyzed and classified in a background processing function, so that the resource overhead of interruption is reduced; in the timer interruption, the control register and the status register are assigned and refreshed according to the analyzed data processing result, and the process control and the status monitoring are carried out in real time; in the data analysis process, data is packed, classified and processed by an object-oriented method, so that clear data management is realized.
Specifically, the software design is as shown in fig. 6:
after the carrier module is electrified and initialized, the system automatically enters a state of receiving data from the power supply line and starts to detect whether a carrier signal exists or not, if carrier data on the power supply line is detected, the main control chip controls the carrier chip to enter a data receiving state of the power supply line, the processed and demodulated carrier data is sent to the main control chip, and the main control chip enters a carrier receiving interrupt program; if no carrier data is detected on the power supply line, the main control chip detects whether serial port communication data which needs to be sent to the power supply line exists or not, and if not, the main control chip circularly waits for receiving the carrier data; if the serial port data exists, the main control chip enters a serial port to receive and interrupt, after the serial port byte data is received, the sending judgment frame head and the calculated check code are added, and the data are sent to the power supply line together, and a software design flow chart is shown in fig. 6.
In the above implementation, when receiving data: the signal transmitting and receiving circuit receives the carrier signal on the power line, and the carrier signal is sent to the modulation and demodulation circuit to be demodulated and converted into a digital signal, and then the digital signal is transmitted to the main control circuit to complete the data receiving.
When data is transmitted: the main control circuit sends digital signals to the modulation and demodulation circuit for modulation, and then the digital signals are sent to the signal transmitting and receiving circuit and sent to an external power line.
The power supply carrier frequency of the module can be selected from 60K-132.5 KHZ, the serial port communication speed can be selected from 1200-460800 BPS, the power supply line communication speed can be selected from 600-4800 BPS, and the module can be used on a power supply line under 220VAC or 350VDC, so that the module is suitable for various working environments.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms, and any person skilled in the art may change or modify the technical content disclosed above into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a be applied to power supply carrier communication module of flexible system of dragging under water, includes master control circuit and modem circuit and carrier signal transmission receiving circuit, its characterized in that: the main control circuit and the carrier signal transmitting and receiving circuit are connected with a modulation and demodulation circuit, wherein,
the main control circuit is a system taking an STM32F103RCT6 singlechip as a core;
the modulation and demodulation circuit comprises a low-voltage power supply carrier chip ST7540 and a low-pass filter, and the low-pass filter is connected with the carrier chip;
the carrier signal transmitting and receiving circuit comprises a coupling transformer, a series resonance circuit and a parallel resonance circuit, wherein the series resonance circuit and the parallel resonance circuit are connected with the coupling transformer.
2. A power supply carrier communication module applied to an underwater flexible towing system, according to claim 1, characterized in that: the main control circuit comprises a power supply filtering unit, a crystal oscillator unit, a chip reset unit and a main control chip unit; wherein,
the crystal oscillator unit comprises a crystal oscillator matching capacitor C1, a matching capacitor C9, a matching resistor R6 and an 8M passive crystal oscillator G1, the crystal oscillator unit is used for providing reference frequency for the main control chip, and the crystal oscillator unit is connected with the 5 th pin and the 6 th pin of the main control chip;
the power supply filtering unit comprises C2, C5, C10 and C11 with the capacitance value of 0.1uF, and C3, C4, C6 and C12 with the capacitance value of 10uF, and is used for filtering and storing energy for VCC supplied to the main control chip, so that abnormal work caused by fluctuation of power supply voltage of the chip is prevented, and the power supply filtering unit is connected with VDD and VSS of the main control chip.
3. The power supply carrier communication module applied to the underwater flexible towing system according to claim 2, wherein: the chip reset unit comprises a resistor R8 with the resistance value of 10K omega and a ceramic dielectric capacitor C21 with the capacitance value of 0.1uF, the chip reset unit is used for providing reset signal level for the main control chip during power-on initialization, and the chip reset unit is connected with the 7 th pin of the main control chip.
4. The power supply carrier communication module applied to the underwater flexible towing system according to claim 2, wherein: the main control chip unit comprises an LED indicating lamp circuit consisting of H2 and R18 and an arm chip, and the model number of the LED indicating lamp circuit is STM32F103RCT 6.
5. The power supply carrier communication module applied to the underwater flexible towing system according to claim 2, wherein: the main control chip comprises the following tasks:
the SPI information receiving and analyzing device is used for receiving SPI information from the modulation and demodulation circuit, analyzing and sending the SPI information to the RS232 serial port communication circuit;
the system comprises a modulation and demodulation circuit, an SPI (serial peripheral interface) interface, a data processing module and a data processing module, wherein the modulation and demodulation circuit is used for receiving RS232 information from external communication equipment, analyzing and processing the information and then sending the information to the modulation and demodulation circuit through the SPI interface for modulation processing;
the pins 21, 22 and 23 of the main control chip unit are connected with the pins 4, 6 and 8 of the modulation and demodulation chip unit for SPI communication.
6. The power supply carrier communication module applied to the underwater flexible towing system according to claim 1, wherein: the modulation and demodulation circuit comprises a low-pass power supply filtering unit and a modulation and demodulation chip unit; the low-pass filtering unit comprises resistors with the codes of R11, R13, R14, R15, R16 and R17 and capacitors with the codes of C26, C27, C28, C29 and C30, and is used for matching proper values; the low-pass filter unit is connected with a response pin of the modulation and demodulation chip.
7. The power supply carrier communication module applied to the underwater flexible towing system according to claim 6, wherein: the modulation and demodulation chip unit comprises a carrier chip ST7540 with the code number of U11, a pull-down resistor R29, R24, R27, R30 and C34, wherein the pull-down resistor R29 is used for enabling the modulation and demodulation chip to work in an SPI communication mode, and ST7540 is an important device for modulation and demodulation and is used for receiving and demodulating information from a carrier power line and sending digital quantity information to a main control chip STM32F103 through an SPI communication line after processing; the SPI serial digital information from the STM32F103 is received, modulated and sent to a carrier communication line through a resonant circuit, and the modulation and demodulation unit is connected with the low-pass filter, the main control chip unit, the series resonant unit and the parallel resonant unit.
8. The power supply carrier communication module applied to the underwater flexible towing system according to claim 1, wherein: the carrier signal transmitting and receiving circuit comprises a coupling voltage transformation and stabilization unit, a series resonance unit, a parallel resonance unit and a clamping protection unit, wherein the coupling voltage transformation and stabilization unit comprises a TVS (transient voltage suppressor) with the code of V2 and a coupling transformer with the code of L2, the TVS is used for preventing a circuit module from being damaged due to static electricity or surge, the TVS is used for protecting the circuit, the coupling transformer is used for isolating received carrier signals, and the coupling voltage transformation unit is connected with C22 and L1 of the series resonance circuit and L3 and C25 of the parallel resonance circuit.
9. The power supply carrier communication module applied to the underwater flexible towing system according to claim 8, wherein: the co-resonant cell and the series resonant cell are connected by a coupling transformer L2, wherein,
the series resonance unit comprises a filter capacitor with the code number of C22 and an inductor with the code number of L1;
the parallel resonance unit comprises a capacitor with the code number of C25, an inductor with the code number of L3 and an R10 resistor, and the inductor and the capacitor are connected in parallel.
10. The power supply carrier communication module applied to the underwater flexible towing system according to claim 8, wherein: the clamping protection unit comprises diodes with the code numbers of V1 and V3 and capacitors C23 and C24, clamps the voltage of signals PA _ OUT and RX _ IN IN the range of 0V-12V, and is used for avoiding the damage of a circuit caused by voltage fluctuation.
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|---|---|---|---|---|
| US4319224A (en) * | 1978-06-08 | 1982-03-09 | Siemens Aktiengesellschaft | Powerline carrier control system with powerline current compensation |
| WO1997011394A2 (en) * | 1995-09-22 | 1997-03-27 | The Laitram Corporation | Electrical power distribution and communication system for an underwater cable |
| CN204906422U (en) * | 2015-07-10 | 2015-12-23 | 哈尔滨理工大学 | Gateway circuit of intelligence house based on STM32 |
| CN105406899A (en) * | 2015-10-23 | 2016-03-16 | 中国海洋大学 | Power line carrier communication apparatus used for overocean communication |
| CN211741864U (en) * | 2019-11-28 | 2020-10-23 | 哈尔滨理工大学 | Monitoring system of infectious disease room based on power line communication technology |
-
2021
- 2021-12-24 CN CN202111596236.2A patent/CN114374410A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4319224A (en) * | 1978-06-08 | 1982-03-09 | Siemens Aktiengesellschaft | Powerline carrier control system with powerline current compensation |
| WO1997011394A2 (en) * | 1995-09-22 | 1997-03-27 | The Laitram Corporation | Electrical power distribution and communication system for an underwater cable |
| CN204906422U (en) * | 2015-07-10 | 2015-12-23 | 哈尔滨理工大学 | Gateway circuit of intelligence house based on STM32 |
| CN105406899A (en) * | 2015-10-23 | 2016-03-16 | 中国海洋大学 | Power line carrier communication apparatus used for overocean communication |
| CN211741864U (en) * | 2019-11-28 | 2020-10-23 | 哈尔滨理工大学 | Monitoring system of infectious disease room based on power line communication technology |
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