CN109639316B - Network communication system for non-polar energy and information transfer multiplexing - Google Patents
Network communication system for non-polar energy and information transfer multiplexing Download PDFInfo
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- CN109639316B CN109639316B CN201811598686.3A CN201811598686A CN109639316B CN 109639316 B CN109639316 B CN 109639316B CN 201811598686 A CN201811598686 A CN 201811598686A CN 109639316 B CN109639316 B CN 109639316B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/544—Setting up communications; Call and signalling arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
Abstract
The invention relates to a network communication system for nonpolar energy and information transfer multiplexing, which consists of a cable, a bus control device and a terminal communication device, wherein the bus control device comprises a first sending unit, a first receiving unit, a first signal modulation unit, a first signal demodulation unit, a first spread spectrum unit, a first de-spread unit, a first encryption unit, a first decryption unit, a feedback error detection unit, a first control unit and a power supply; the terminal communication device comprises a second sending unit, a second receiving unit, a second signal modulation unit, a second signal demodulation unit, a second spread spectrum unit and a second de-spread unit, a second encryption unit, a second decryption unit, a second control unit, an impedance matching unit, a feedback unit and an energy receiving unit; the reliability, the communication rate and the information transmission safety of the large-scale networking of the initiating explosive devices are achieved. The method is suitable for large-scale networking communication of deep hole blasting in the field of digital electronic detonators and electric initiating explosive device network communication needing high-speed response.
Description
Technical Field
The invention relates to an initiating explosive device and the technical field of safety protection using the initiating explosive device, such as a digital electronic detonator, an air bag and an aircraft attitude and orbit control system, in particular to a network communication system for nonpolar energy and information transmission multiplexing.
Background
The initiating explosive device is an excitation source of various explosive and explosive systems, the control of the initiating explosive device directly determines the performance and success or failure of the system, and the performance and safety of electronic and networked initiating explosive devices are greatly improved, so that the initiating explosive device is the mainstream of novel initiating explosive devices.
At present, programmable digital electronic detonators electrically connected have the advantages of being safe in nature, convenient for network detection and field editing of blasting parameters, and can achieve accurate blasting. However, the existing network system adopts single-ended signal communication, which has serious signal distortion, is easily interfered, is not suitable for large-scale networking or high-speed data transmission, and is particularly represented in the following aspects:
1. some researches also adopt differential receiving and current loop transmitting on the electronic detonator, but the problems of complex differential receiving circuit, poor signal consistency of a simple current loop in a network and the like are solved, and further improvement is needed.
2. Networking of the digital electronic detonator needs high efficiency, and impedance matching of the network is expected to be solved in a self-adaptive mode.
3. Many information of the digital electronic detonator cannot be repeatedly sent in transmission, for example, because the initiation information has a synchronization requirement, the information is in a broadcast form, the number of corresponding nodes is huge, hundreds of nodes or even tens of thousands of nodes are not allowed to generate a receiving error, and a single cyclic code error control mechanism cannot meet the requirement.
4. The digital electronic detonator requires that a user has use legality when using the digital electronic detonator, detonation is not allowed when the digital electronic detonator is used illegally, and a single password mechanism has security holes in transmission.
5. Various safety airbags using initiating explosive devices can effectively absorb impact energy of collision parts, and with the improvement of protection requirements, an airbag array formed by a plurality of airbags is required to realize all-round protection. However, each airbag requires a pair of control wires, and when tens of airbag modules are required, the numerous control wires can cause problems for system control. Therefore, such systems need to be connected in a bus manner to facilitate wiring. Meanwhile, high-speed bidirectional information transmission is required to meet the requirement of real-time response. Similar problems occur with other pyrotechnic array devices that require control, such as aircraft attitude and orbit control systems, various array protection airbags, and the like.
6. Such systems also require high-speed and reliable downlink command transmission, and in particular require the terminal to have self-healing capability for received information when it is disturbed.
7. In many occasions requiring intrinsic safety and explosion prevention, many occasions with limited space of terminals and many occasions inconvenient to use batteries for power supply, efficient energy transfer and information transfer multiplexing are needed.
8. In particular, the input of the terminal is not allowed to have polarity requirements in many occasions, such as the intrinsic safety requirements of a digital electronic detonator and some use environments, and a remote plug-in device is required.
Therefore, it is very important to research a simple, reliable and non-polar energy information multiplexing full duplex communication system.
Disclosure of Invention
The invention aims to provide a network communication system for transmitting and multiplexing nonpolar energy and information, which only uses two connecting wires to connect terminals in a nonpolar way to form the network communication system, and can realize high-reliability full-duplex communication and energy transmission.
In order to realize the task, the invention adopts the following technical solution:
a network communication system for non-polar energy and information transfer multiplexing is characterized by comprising a cable, a bus control device and a terminal communication device, wherein:
the bus control device comprises a first sending unit, a first receiving unit, a first signal modulation unit, a first signal demodulation unit, a first spread spectrum unit, a first de-spread unit, a first encryption unit, a first decryption unit, a feedback error detection unit, a first control unit and a power supply; wherein:
the first control unit is connected with a power supply, is sequentially connected with the first spread spectrum unit, the first signal modulation unit and the first sending unit through the first encryption unit and is connected with the cable through the first sending unit;
the first sending unit is also connected with the first signal demodulation unit, the first despreading unit and the first decryption unit in sequence through the first receiving unit and connected with the first control unit through the first decryption unit;
the first signal modulation unit is connected with the feedback error detection unit, the first signal demodulation unit is also connected with the feedback error detection unit, the feedback error detection unit is connected with the first control unit, and the first control unit is also connected with the first signal modulation unit;
the terminal communication device comprises a second sending unit, a second receiving unit, a second signal modulation unit, a second signal demodulation unit, a second spread spectrum unit, a second de-spread spectrum unit, a second encryption unit, a second decryption unit, a second control unit, an impedance matching unit, a feedback unit and an energy receiving unit, wherein:
the cable is connected with a second receiving unit, and the second receiving unit is sequentially connected with a second signal demodulation unit, a second despreading unit and a second decryption unit and is connected with a second control unit through the second decryption unit; the second control unit is also sequentially connected with the second spread spectrum unit, the second signal modulation unit, the second sending unit and the energy receiving unit through a second encryption unit and is connected with the cable through the energy receiving unit;
the second control unit is also connected with the energy receiving unit through the impedance matching unit;
the second signal demodulation unit is also connected with the second sending unit through a feedback unit, and the feedback unit is also connected with a second control unit.
According to the invention, the cable is two wires of either type in parallel.
Further, in the bus control device, the first transmitting unit is an H-bridge or a differential driver, and the first receiving unit is any one of current sensing circuits.
Preferably, in the terminal communication device, the second transmitting unit is a constant current pulse generator, and the second receiving unit may be a balanced receiving circuit such as a polarity identification circuit or a differential circuit.
Preferably, the impedance matching unit in the terminal communication device is adaptively adjustable according to a network size.
Preferably, in the terminal communication device, the energy receiving unit is a bridge switching circuit, and a signal with a changing polarity during the energy transfer process can be converted into direct current electric energy in the energy receiving unit.
Preferably, the first spreading unit and the second spreading unit both adopt a forward error correction code mode or an information redundancy mode for spreading, and the first despreading unit and the second despreading unit both adopt a decoding or voting mode for recovering information.
Preferably, the first encryption unit and the second encryption unit encrypt information by using any one of keys; the first decryption unit and the second decryption unit decrypt information using any one of keys.
Preferably, the first signal modulation unit adopts a pulse width modulation mode to send codes of '0' and '1', and the second signal demodulation unit demodulates the codes of '0' and '1' through the identification of pulse width; the second signal modulation unit sends codes of '0' and '1' in a current loop mode, and the first signal demodulation unit identifies and demodulates the codes of '0' and '1' through the current signal.
And in the process of sending information by the first sending unit, the second sending unit sends back signals at the same time, and different current loop pulse widths in each period represent codes of '0' and '1'.
The invention relates to a network communication system for the transmission and multiplexing of nonpolar energy and information, which brings technical innovation that:
(1) the downlink signals are transmitted in a full-balance mode through a polarity identification circuit or a differential circuit of the terminal communication device and other balanced receiving circuits and an H-bridge driving circuit or a differential driver of the bus control device, the uplink signals are transmitted in a constant current pulse mode, and the circuit structure is simpler than that of a general full-balance mode and has better transmission characteristics than that of a general current loop.
(2) The network scale, the communication distance, the transmission rate and the signal anti-interference capability are improved by 1 to 2 orders of magnitude compared with a single-ended signal mode.
(3) The mechanism of simultaneous transmission of uplink and downlink signals improves the full duplex communication rate of the system by nearly 1 time.
(4) The transmission error composite control mechanism improves the signal-to-noise ratio of signal transmission and the robustness of a data link, and improves the communication error control capability by tens of times compared with a single cyclic code error detection mechanism.
(5) And the network EMI electromagnetic compatibility is improved through the adaptive network impedance matching.
(6) And the data encryption mechanism ensures the information security of network transmission.
(7) The full-period energy transmission mechanism improves the power supply capacity of the terminal.
(8) The simplified OSI reference model construction information architecture has good compatibility.
The network communication system for the nonpolar energy and information transmission multiplexing improves the network scale, the communication rate, the communication reliability and the information transmission safety of the electric initiating explosive device network. The method is suitable for deep-hole large-scale blasting network communication and high-speed initiating explosive device array control in the field of digital detonators.
Drawings
FIG. 1 is a block diagram of a schematic architecture of a non-polar energy and information transfer multiplexing network communication system of the present invention;
FIG. 2 is a signal diagram of a network communication system with nonpolarity energy and information transfer multiplexing according to the present invention;
FIG. 3 is a diagram illustrating an information structure according to the present invention;
FIG. 4 is a block diagram of an example of an application of the present invention;
FIG. 5 is a flowchart of the bus control device program of the present invention;
fig. 6 is a flowchart of the terminal communication device procedure of the present invention.
Wherein the symbols respectively represent: 0. bus control device, 1, cable, 2, terminal communication device;
01. the device comprises a first sending unit, a first receiving unit, a first signal modulating unit, a first signal demodulating unit, a first spreading unit, a first despreading unit, a first encrypting unit, a first decrypting unit, a first feedback error detecting unit, a first control unit, a second;
21. second transmitting section 22, second receiving section 23, second signal modulating section 24, second signal demodulating section 25, second spreading section 26, second despreading section 27, second encrypting section 28, second decrypting section 29, second controlling section 210, impedance matching section 211, feedback section 212, and energy receiving section.
X in fig. 2 represents no data.
The symbols in fig. 4 represent: 3. the system comprises a blasting controller (or an automobile safety air bag control unit ACU), a 31, an encoder (a sensing control unit), 4, an intelligent electronic detonator (or an air bag module), 41, an intelligent electric ignition head interface, 42 and a detonator (or an air bag).
In order to make the technical means, characteristics, objectives and functions of the present invention easily understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Detailed Description
As shown in fig. 1, the present embodiment provides a network communication system for multiplexing nonpolar energy and information transfer, which is composed of a cable 1, a bus control device 0 and a terminal communication device 2, wherein:
the bus control device 0 comprises a first sending unit 01, a first receiving unit 02, a first signal modulating unit 03, a first signal demodulating unit 04, a first spreading unit 05, a first despreading unit 06, a first encrypting unit 07, a first decrypting unit 08, a feedback error detecting unit 09, a first control unit 010 and a power supply 011; wherein:
the first control unit 010 is connected with the power supply 011, and the first control unit 010 is connected with the first spread spectrum unit 05, the first signal modulation unit 03 and the first transmission unit 01 in sequence through the first encryption unit 07 and is connected with the cable 1 through the first transmission unit 01;
the first sending unit 01 is further connected with a first signal demodulating unit 04, a first despreading unit 06 and a first decrypting unit 08 in sequence through a first receiving unit 02, and is connected with a first control unit 010 through the first decrypting unit 08;
the first signal modulation unit 03 is connected with the feedback error detection unit 09, the first signal demodulation unit 04 is also connected with the feedback error detection unit 09, the feedback error detection unit 09 is connected with the first control unit 010, and the first control unit 010 is also connected with the first signal modulation unit 03;
the cable 1 can be any one of two parallel wires, such as a twisted pair and a dual-core parallel wire; the cable 1 connects the bus control device 0 and a plurality of terminal units 2.
The terminal communication apparatus 2 includes a second transmitting unit 21, a second receiving unit 22, a second signal modulating unit 23, a second signal demodulating unit 24, a second spreading unit 25, a second despreading unit 26, a second encrypting unit 27, a second decrypting unit 28, a second controlling unit 29, an impedance matching unit 210, a feedback unit 211, and an energy receiving unit 212, wherein:
the cable 1 is connected to a second receiving unit 22, and the second receiving unit 22 is connected to a second signal demodulating unit 24, a second despreading unit 26, and a second decrypting unit 28 in this order, and is connected to a second control unit 29 through the second decrypting unit 28; the second control unit 29 is further connected to the second spreading unit 25, the second signal modulation unit 23, the second transmitting unit 21 and the energy receiving unit 212 in sequence through a second encryption unit 27, and connected to the cable 1 through the energy receiving unit 212;
the second control unit 29 is also connected with the energy receiving unit 212 through the impedance matching unit 210;
the second signal demodulation unit 24 is further connected to the second transmission unit 21 via a feedback unit 211, the feedback unit 211 being further connected to the second control unit 29.
In this embodiment, the cable 1 is two parallel conductors of any kind, such as twisted pairs. The connection mode of the cable 1 may be a daisy chain type or a bus type in which the connection lines of the bus controller 0 and the terminal communication device 2 are connected in parallel to two lines of the cable 1.
In the bus control device 0, the first transmitting unit 01 is an H-bridge or a differential driver, and the first receiving unit 02 is any one of current sensing circuits.
In the terminal communication device 2, the second transmitting unit 21 is a constant current pulse generator, and the second receiving unit 22 is a balanced receiving circuit of either a polarity identification circuit or a differential circuit.
The impedance matching unit 210 described in the terminal communication device 2 can be adaptively adjusted according to the network size.
In the terminal communication device 2, the energy receiving unit 212 is a bridge switching circuit, and a signal with a changing polarity during the energy transfer process can be converted into direct current electric energy in the energy receiving unit 212.
The first spreading unit 05 and the second spreading unit 25 both adopt a forward error correction code mode or an information redundancy mode for spreading, and the first despreading unit 06 and the second despreading unit 26 both adopt a decoding or voting mode for recovering information.
The first encryption unit 07 and the second encryption unit 27 encrypt information with any one of keys; the first decryption unit 08 and the second decryption unit 28 decrypt information using either key.
The first signal modulation unit 03 adopts a pulse width modulation mode to send codes of '0' and '1', and the second signal demodulation unit 24 demodulates the codes of '0' and '1' by identifying pulse widths; the second signal modulation unit 23 transmits codes of "0" and "1" in a current loop manner, and the first signal demodulation unit 04 recognizes and demodulates the codes of "0" and "1" by a current signal.
In this embodiment, in the bus control device 0, the first transmitting unit 01 is an H-bridge or a differential driver, and the first receiving unit 02 is preferably any current sensing circuit.
The second sending unit 21 can be any constant current pulse generator, and has better transmission characteristics than a common current loop;
the second receiving unit 22 is a polarity identification circuit, receives the downlink signal by sensing the polarity change of the bus, and can omit a complex differential amplifier;
the feedback unit 211 is a unit that can feedback the downlink bit signal to the uplink after feedback processing;
the impedance matching unit 210 is a controllable impedance unit that can dynamically adjust the loop impedance.
Inside the first and second control units (010, 29), there are provided information control of full duplex communication and information and energy transmission programs, which are a full-cycle energy transmission mechanism, and the bipolar alternate output mode has no energy interruption in the pulse cycle. Wherein:
the program flow of the bus control device 0 is shown in fig. 5:
for the downlink signal, firstly processing data, arranging the data into a data frame, then encrypting the processed data, adding a spread spectrum code, adding a CRC check code, adding a frame header and a mark, modulating the signal, then sending a bit and sending the bit.
The feedback mode is optional, and is used in some special occasions, firstly, through the judgment of selecting the feedback mode, if yes, the transmitted bit in the period is stored, in the next bit transmission period, the received response bit is used to judge whether the bit is equal, if the bit is not equal, the error record is stored, after the frame data is transmitted, whether the receiving error exists is judged, if yes, the modulation signal stage is returned, the bit is retransmitted, if not, the transmission program is ended without error.
And for the uplink signal, entering a receiving program, receiving bits, demodulating the signal, removing a frame header and a mark, performing CRC (cyclic redundancy check), despreading, decrypting, processing data and ending the receiving program.
The program flow of the terminal communication device 2 is shown in fig. 6:
for the downlink signal, firstly, receiving bit, demodulating signal, removing frame head and mark, making CRC check, despreading, deciphering, processing data and finishing. And if so, modulating the received bit, and sending the responded bit in the next bit receiving period.
For the uplink signal, firstly processing data, arranging the data into a data frame, then encrypting the data, adding a spread spectrum code, adding a CRC check code, adding a frame header and a mark, modulating the signal, then sending a bit and sending.
In the information control and information and energy transmission program of the full duplex communication, the transmission of the downlink signal is realized by a signal of a full balance mode, and the transmission of the uplink signal is realized by a current loop signal.
Compared with the conventional single-ended voltage mode, the downlink signal transmission mode improves the communication distance and the communication speed by dozens of to hundreds of times. Compared with the conventional full-balanced circuit, the uplink signal transmission mode is simple and reliable.
The transmission of the uplink and downlink signals is carried out simultaneously, and each downlink bit signal in the connected cable is simultaneously accompanied by an uplink bit signal. Therefore, the communication speed of the network communication system multiplexing the non-polar energy and the information transfer is improved by nearly one time.
The information control and information and energy transmission program of the full-duplex communication also comprises a composite transmission error control mechanism adopting spread spectrum, forward error correction and feedback error detection, and the error control capability is tens of times of that of a common pure cyclic code mechanism.
The information control of the full-duplex communication and the information and energy transmission program are also provided with control for ensuring information safety, and an encryption mechanism is adopted for the transmitted information, so that the information is safer than the information which is only controlled by a password.
The information control and information and energy transmission program of the full-duplex communication is also provided with a network impedance matching method, so that the self-adaptive impedance matching of the network is realized, the reflected wave of the network is absorbed, and the EMI electromagnetic compatibility of the network is improved.
The signal diagram of the network communication system of the present embodiment with multiplexing of non-polar energy and information transfer is shown in fig. 2.
As shown in fig. 3, the information control and information and energy transmission procedure of the full duplex communication adopts a simplified OSI reference model, and its architecture is three layers: an application layer, a data link layer, and a physical layer, wherein:
an application layer: the application layer encrypts or decrypts the transmitted information, so that the safety of the information is ensured;
data link layer: the method comprises a frame head, a spread spectrum, an error correction, an encryption, data and a frame tail, adopts a spread spectrum mode and a Forward Error Correction (FEC) method to improve the error control capability of a channel, increases some redundant information in a transmission data sequence, and corrects error code elements injected in a data transmission process in time at a receiving end, thereby improving the robustness of a data link and meeting the requirement of reliable transmission of important information in a one-to-many broadcast mode.
The spreading mode may be any, such as direct spreading.
The code system used for the forward error correction code (FEC) can be any one, such as hamming code, BCH code, convolutional code, Turbo code, RS code, and triple modular redundancy code.
The data link layer solves the conflict problem of data uploading of a plurality of terminals by using a bitwise arbitration method, each terminal has a network ID, the smaller the network ID, the higher the priority, the terminal needing to upload data sends an application, a bus control device sends out a network ID query, the bitwise query and the bitwise confirmation are carried out, the terminal sending out the application checks the bitwise and responds, the bus control device sends out an allowable instruction for receiving the terminal application according to the result, and the terminal receiving the instruction uploads information.
The header of the data link layer can adopt HDLC bit-oriented synchronous protocol, and the tail of the frame adopts (CRC) cyclic code plus mark.
Physical layer: an MPSK signal transmission mechanism with adaptively adjusted transmission frequency is adopted to meet the requirements of different network scales. The transmission of logic "0", "1" and "null" is realized by different pulse widths, such as: "0" is represented by 30% duty cycle, "1" is represented by 70% duty cycle, and "empty" is represented by 90% duty cycle.
Different pulse widths may use different signal level varying edges, such as: the rising edge represents the frequency and the falling edge represents the pulse width, and can also be the edge of the same signal level change, such as: the frequency or pulse width is represented by either a rising edge or a falling edge.
The MPSK signal transmission mechanism with the transmission frequency adjusted in a self-adaptive mode is a pulse width modulation mode with the transmission frequency capable of being set, the long-distance transmission frequency of a large-scale network can be reduced, the short-distance transmission frequency of a small scale can be improved, and the maximum communication speed under high reliability can be obtained.
The physical layer can adopt a downlink signal receiver to feed back an error detection mode in a real-time bit-by-bit manner, each bit receiver of the downlink signal responds in real time, the received signal is fed back in the next downlink signal period, the feedback signal is related to the received signal, and the bus controller judges a transmission result according to the feedback signal.
Specific application example 1:
referring to fig. 1, 4, 5 and 6, a network communication system for multiplexing nonpolar energy and information transmission is adopted to connect an intelligent electronic detonator system, and the intelligent electronic detonator system comprises a blasting controller 3 and an intelligent electronic detonator 4.
The blasting controller 3 and the intelligent electronic detonator 4 are connected with the cable 1 through a bus control device 0 of a network communication system for transmitting and multiplexing nonpolar energy and information, the blasting controller 3 comprises an encoder 31, and the encoder 31 is connected with a first control unit 010 of the bus control device 0; the intelligent electronic detonator 4 comprises an electric ignition head intelligent interface 41 and a detonator 42 which are described in Chinese patent ZL201410009486.5, and n intelligent electronic detonators 4 can be provided.
The intelligent interface 41 of the electric ignition head is connected with the second control unit 29 of the terminal communication device 2 of the network communication system for multiplexing the nonpolar energy and the information transmission, and the intelligent interface 41 of the electric ignition head is connected with the detonator 42.
Downlink signals: the encoder 31 edits the parameters of each detonator in the blasting network, sends the related parameters as source codes to the first control unit 010 to enter an application layer, the first control unit 010 encrypts the source codes through the first encryption unit 07, the encrypted codes enter a data link layer, error correction codes and spread codes are added through the first spread unit 05 to form information frames to enter the first modulation unit 03, the first modulation unit 03 adds a frame head and a frame tail to the information frames, the information frames enter a physical layer through the first sending unit 01 to be converted into voltage signals with different pulse widths, the voltage signals are transmitted to the second receiving unit 22 through the cable 1, the second receiving unit 22 identifies the signals to enter a data link layer and then are transmitted to the second signal demodulation unit 24, the frame head and the frame tail are removed through the second signal demodulation unit 24, the demodulated information frames are transmitted to the second signal de-spreading unit 26, the de-spreading codes are analyzed through the second signal de-spreading unit 26 to enter the application layer, the source code is sent to the second decryption unit 28, the second decryption unit 28 decrypts the source code and sends the source code to the second control unit 29, the second control unit 29 sends the source code to the intelligent electric ignition head interface 41, and the intelligent electric ignition head interface 41 controls the detonator 42.
Uplink signals: the intelligent interface 41 of the electric ignition head sends the source code into the second control unit 29 to enter the application layer, the second encryption unit 27 encrypts the source code, the encrypted code enters the data link layer, the second spread spectrum unit 25 adds the error correcting code and spread spectrum code to form the information frame to enter the second signal modulation unit 23, the second signal modulation unit 23 adds the frame head and frame tail to the information frame, the information frame enters the physical layer through the second sending unit 21 and the energy receiving unit 212 to send out the current signals with different pulse widths, the cable 1 sends the signal to the first receiving unit 02 through the first sending unit 01, the first receiving unit 02 identifies the signal and sends the signal to the first signal demodulation unit 04 of the data circuit layer, the information frame is demodulated by the first signal demodulation unit 04 after the frame tail is removed, the signal is sent to the first de-spread unit 06, the code is analyzed by the first de-spread unit 06 to enter the first decryption unit 08 of the application layer, the first decryption unit 08 decrypts the source code and sends it to the first control unit, which sends it to the encoder 31.
Uplink signals for feedback: after receiving the voltage signal, the second receiving unit 22 demodulates the bit through the second signal demodulating unit 24, the second signal modulating unit 23 converts the bit into a current signal, the current signal is transmitted through the second transmitting unit 21 through the energy receiving unit 212, the cable 1 transmits the signal to the first transmitting unit 01, the first receiving unit 02 identifies the signal and transmits the signal to the first signal demodulating unit 04, the demodulated signal is compared with the previously transmitted bit, the error information is transmitted to the first control unit 010, and the first control unit 010 retransmits the information.
Impedance matching: the bus control device 0 determines matching parameters according to network parameters, such as network scale and communication distance, and sends the parameters to the detonator through a downlink signal, and starts the impedance matching unit 210.
And (3) transmission error control: when the transmitted detonation information is interfered, the information received by the detonator has errors, and the bus control device 0 enables the detonator to repair the errors by adding a forward error correction code technology, so that real-time execution is ensured.
Control of illegal use: the encrypted information transmitted on the bus control device 0 improves the cracking difficulty.
Specific application example 2:
with continued reference to fig. 1, 4, 5, and 6, a tailored application does not perform encryption or decryption. The method comprises the steps that a network communication system multiplexing nonpolar energy and information transmission is adopted to connect an automobile airbag control system, the automobile airbag control system comprises an automobile airbag control unit 3(ACU) and an airbag module 4, the automobile airbag control unit 3 is connected with a cable 1 through a bus control device 0 of the network communication system multiplexing nonpolar energy and information transmission, the automobile airbag control unit 3 comprises a sensing control unit 31, and the sensing control unit 31 is connected with a first control unit 010 of the bus control device 0; the airbag module 4 comprises an intelligent electric ignition head interface 41 and airbags 42 described in chinese patent (ZL201410009486.5), and there may be n airbag modules 4;
the intelligent interface 41 of the electric ignition head is connected with the second control unit 29 of the terminal communication device 2 of the network communication system for multiplexing the nonpolar energy and the information transmission, and the intelligent interface 41 of the electric ignition head is connected with the air bag 42.
The parameters of the deployment are sent to the airbag to be deployed and the airbag module 4 deploys the airbag 42 at the required force. The airbag module 4 transmits back the inspection diagnosis result of the airbag module 4 through the feedback signal.
Downlink signals: when the automobile has a collision accident, the sensor control unit 31 senses the collision event, judges the part to be protected through an algorithm, sends the source code to the first control unit 010, the source code directly enters a data link layer, an information frame is formed by adding an error correcting code and a spread spectrum code through a first spread spectrum unit 05, a frame head and a frame tail are added in a first modulation unit 03, the information frame is converted into a voltage signal of different pulse width by the first transmitting unit 01 into the physical layer, the cable 1 transmits the voltage signal to the second receiving unit 22, after the signals are identified, the signals are sent to a second signal demodulation unit 24 to enter a data link layer, a frame head and a frame tail are removed to demodulate an information frame, the information frame is sent to a second despreading unit 26 to analyze a source code and sent to a second control unit 29, the second control unit 29 judges whether the information sent to the module is available, and if the information is available, the information is sent to an electric ignition head intelligent interface 41 to control an air bag 42.
Similar application examples are also available, such as rocket attitude trajectory controller, various high-speed response electric initiating explosive devices and the like, which are not listed here.
It will be appreciated by those skilled in the art that the network communication system for multiplexing nonpolar energy and information transfer of the present invention can be implemented in other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the embodiments and application examples disclosed above are only illustrative in all aspects, and are not intended to limit the present invention, and all additions or modifications made on the basis of the technical solutions of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A network communication system for non-polar energy and information transfer multiplexing, comprising a cable (1), a bus control device (0) and a terminal communication device (2), wherein:
the bus control device (0) comprises a first sending unit (01), a first receiving unit (02), a first signal modulating unit (03), a first signal demodulating unit (04), a first spreading unit (05), a first despreading unit (06), a first encrypting unit (07), a first decrypting unit (08), a feedback error detecting unit (09), a first control unit (010) and a power supply (011); wherein:
the first control unit (010) is connected with a power supply (011), and the first control unit (010) is connected with the first spread spectrum unit (05), the first signal modulation unit (03) and the first sending unit (01) in sequence through the first encryption unit (07) and is connected with the cable (1) through the first sending unit (01);
the first sending unit (01) is also sequentially connected with a first signal demodulation unit (04), a first despreading unit (06) and a first decryption unit (08) through a first receiving unit (02), and is connected with a first control unit (010) through the first decryption unit (08);
the first signal modulation unit (03) is connected with the feedback error detection unit (09), the first signal demodulation unit (04) is also connected with the feedback error detection unit (09), the feedback error detection unit (09) is connected with the first control unit (010), and the first control unit (010) is also connected with the first signal modulation unit (03);
the terminal communication device (2) comprises a second transmitting unit (21), a second receiving unit (22), a second signal modulating unit (23), a second signal demodulating unit (24), a second spreading unit (25), a second despreading unit (26), a second encrypting unit (27), a second decrypting unit (28), a second control unit (29), an impedance matching unit (210), a feedback unit (211) and an energy receiving unit (212), wherein:
the cable (1) is connected with a second receiving unit (22), the second receiving unit (22) is sequentially connected with a second signal demodulating unit (24), a second despreading unit (26) and a second decrypting unit (28), and is connected with a second control unit (29) through the second decrypting unit (28); the second control unit (29) is also sequentially connected with the second spread spectrum unit (25), the second signal modulation unit (23), the second sending unit (21) and the energy receiving unit (212) through a second encryption unit (27), and is connected with the cable (1) through the energy receiving unit (212);
the second control unit (29) is also connected with the energy receiving unit (212) through the impedance matching unit (210);
the second signal demodulation unit (24) is also connected with the second sending unit (21) through a feedback unit (211), and the feedback unit (211) is also connected with a second control unit (29).
2. The system according to claim 1, wherein the cable (1) is two parallel wires of either type.
3. The network communication system for the non-polar energy and information transfer multiplexing of claim 1, characterized in that in the bus control device (0), the first transmitting unit (01) is an H-bridge or differential driver, and the first receiving unit (02) is any kind of current sensing circuit.
4. The system according to claim 1, wherein the second transmitter unit (21) is a constant current pulse generator and the second receiver unit (22) is a polarity identification circuit or a differential circuit receiver circuit in the terminal communication device (2).
5. The system according to claim 1, wherein the impedance matching unit (210) in the terminal communication device (2) is adaptively adjustable according to the network size.
6. The network communication system for the non-polar energy and information transfer multiplexing of claim 1, characterized in that in the terminal communication device (2), the energy receiving unit (212) is a bridge switching circuit, and the signal with the changing polarity during the energy transfer can be converted into the direct current power in the energy receiving unit (212).
7. The system according to claim 1, wherein the first spreading unit (05) and the second spreading unit (25) are spread by forward error correction code or information redundancy, and the first despreading unit (06) and the second despreading unit (26) are decoded or voted to recover information.
8. The system according to claim 1, wherein the first encryption unit (07) and the second encryption unit (27) encrypt the information using any one of keys; the first decryption unit (08) and the second decryption unit (28) decrypt information using either key.
9. The network communication system for the non-polar energy and information transfer multiplexing according to claim 1, wherein the first signal modulation unit (03) adopts a pulse width modulation mode to transmit codes of '0' and '1', and the second signal demodulation unit (24) demodulates the codes of '0' and '1' through the identification of the pulse width; the second signal modulation unit (23) sends codes of '0' and '1' in a current loop mode, and the first signal demodulation unit (04) identifies and demodulates the codes of '0' and '1' through a current signal.
10. The system according to claim 1, wherein during the transmission of the information by the first transmitting unit (01), the second transmitting unit (21) transmits the backtransmission signal at the same time, and different current loop pulse widths in each period represent codes of "0" and "1".
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| EP2482454A1 (en) * | 2011-01-28 | 2012-08-01 | Niko NV | Measuring device for detecting a modulation signal on a bus with unknown polarity and bus device |
| CN104572337A (en) * | 2015-01-26 | 2015-04-29 | 中国航天科技集团公司第九研究院第七七一研究所 | Inter-chip data transmission method |
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| CN207475583U (en) * | 2017-10-31 | 2018-06-08 | 佛山市赛扬电子科技有限公司 | A kind of direct current carrier communication interface circuit of achievable power delivery |
| CN208172935U (en) * | 2018-04-24 | 2018-11-30 | 深圳市中电数通智慧安全科技股份有限公司 | A kind of fire-fighting indicating equipment |
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|---|---|---|---|---|
| EP2482454A1 (en) * | 2011-01-28 | 2012-08-01 | Niko NV | Measuring device for detecting a modulation signal on a bus with unknown polarity and bus device |
| CN104572337A (en) * | 2015-01-26 | 2015-04-29 | 中国航天科技集团公司第九研究院第七七一研究所 | Inter-chip data transmission method |
| CN106528481A (en) * | 2016-12-29 | 2017-03-22 | 无锡华润矽科微电子有限公司 | Discharge circuit integrated behind bus rectifier bridge at interior of slave chip |
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