CN113596829B - Real-time online key transmission device and method for networking scene of power terminal - Google Patents
Real-time online key transmission device and method for networking scene of power terminal Download PDFInfo
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- CN113596829B CN113596829B CN202110767977.6A CN202110767977A CN113596829B CN 113596829 B CN113596829 B CN 113596829B CN 202110767977 A CN202110767977 A CN 202110767977A CN 113596829 B CN113596829 B CN 113596829B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
- H04W12/043—Key management, e.g. using generic bootstrapping architecture [GBA] using a trusted network node as an anchor
- H04W12/0431—Key distribution or pre-distribution; Key agreement
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/009—Security arrangements; Authentication; Protecting privacy or anonymity specially adapted for networks, e.g. wireless sensor networks, ad-hoc networks, RFID networks or cloud networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/80—Wireless
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a real-time online key transmission device and a method for a networking scene of an electric power terminal, wherein the device comprises a transmitting end, and the transmitting end comprises a digital edge pulse generator, a frequency integrated circuit, a pulse control switch circuit and a transmitting antenna; the digital edge pulse generator processes the input key signal into a bipolar pulse signal; the frequency synthesis circuit provides a first sine wave signal and a second sine wave signal with different frequencies; the pulse control switch circuit is respectively connected with the digital edge pulse generator and the frequency integrated circuit and selectively outputs a first sine wave signal or a second sine wave signal according to the polarity of the pulse output by the digital edge pulse generator; the pulse control switch circuit also transmits the first sine wave signal or the second sine wave signal to the receiving end through the transmitting antenna. The key is converted into the polarized differential pulse waveform, and the rapid low-power consumption transmission of the electric power communication key is realized by means of the pulse control switch circuit, the frequency synthesis circuit and the frequency discriminator.
Description
Technical Field
The invention belongs to the technical field of secret communication, and particularly relates to a real-time online key transmission device and method for a networking scene of an electric power terminal.
Background
In recent years, as the 5G technology is mature, mobile communication has a very large application prospect in the fields of industrial internet and the like. The power system has higher requirements for the wireless communication characteristics of large bandwidth, low time delay and high capacity, and the 5G has higher application value in the power system. In the application of the electric power 5G, dense networking such as distributed new energy of a power generation end, in particular unmanned aerial vehicle networking detection of a solar power generation end, a power transmission and distribution end, multi-terminal networking of a power utilization end and the like, have higher requirements on the safety of an electric power 5G communication system. In the prior art, although the conventional cryptography technology can enhance the authentication and confidentiality of the power system, the secure transmission and the fast demodulation analysis of the power communication key are the problems which are not solved in the present year.
In chinese patent application publication No. CN101202556a, a Wimax broadband wireless communication radio frequency system is disclosed, and broadband wireless communication is realized through a conventional radio frequency transceiver. The main idea is that the signals from the baseband are divided into an I path and a Q path through an intermediate frequency chip and a radio frequency chip, respectively up-converted to 380MHz, and after being filtered by a filter, the signals are synthesized into IF and RF functions, and the IF and the RF functions are connected with the radio frequency chip to send out radio frequency signals. The technology aims at a mobile communication system model of a baseband and a radio frequency, is a main technology of transmission of a communication key, and has larger transmission delay due to baseband compression coding and an up-conversion device of a radio frequency chip.
In the chinese patent application with publication number CN101383888A, an FSK modulation method based on fax demodulation suggestion v2.1 is disclosed, and an FSK modulation method for a fax system is provided, which is mainly characterized in that two carriers with different frequencies are used to represent digital signals 0 and 1, that is, 1850Hz is used to represent that signal 1 is transmitted at this time, and 1650 transmits signal 0. Meanwhile, during the frequency modulation process, the waveform of the next frequency keeps unchanged with the phase of the waveform of the last frequency. In this way it is ensured that there is no phase jump. FSK is commonly used in the modulation and demodulation process of digital communication, and is characterized in that two carriers with different frequencies are used for representing 0 and 1, so that the circuit has long working time and large power consumption, and a wireless communication key cannot be transmitted in an FSK mode at present.
In the patent application with publication number of CN106161307A, a low-cost carrier communication module for realizing OOK modulation and demodulation technology by adopting a singlechip is disclosed, and the problem that the power communication is realized by modulating a digital signal onto a power line in an OOK mode is solved. OOK means that there is a carrier at the time of the number 1, and no carrier is carried at the time of the number zero. This modulation scheme also has a problem of large power consumption when a large number of signals 1 are transmitted. Such modulation techniques are also widely used in wireless communication techniques, but currently cannot be used in wireless communication key transmission procedures.
In summary, the existing key transmission technology faces the problems of high power consumption, high transmission delay and the like.
Disclosure of Invention
Aiming at the problems, the invention provides a real-time online key transmission device and a real-time online key transmission method for a networking scene of an electric power terminal, which realize the rapid low-power consumption transmission of an electric power communication key.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
in a first aspect, the invention provides a real-time online key transmission device for a networking scene of an electric power terminal, which comprises a transmitting end, wherein the transmitting end comprises a digital edge pulse generator, a frequency integrated circuit, a pulse control switch circuit and a transmitting antenna;
the digital edge pulse generator processes an input key signal into a bipolar pulse signal;
the frequency synthesis circuit provides a first sine wave signal and a second sine wave signal with different frequencies;
the pulse control switch circuit is respectively connected with the digital edge pulse generator and the frequency integrated circuit and selectively outputs a first sine wave signal or a second sine wave signal according to the polarity of the pulse output by the digital edge pulse generator;
the pulse control switch circuit is also used for transmitting the first sine wave signal or the second sine wave signal to a receiving end through a transmitting antenna, and the receiving end is used for generating a key stream which is actually transmitted based on the received first sine wave signal or the second sine wave signal.
Optionally, the digital edge pulse generator is an LC differential network, and differentiates edges of a key signal input in series into bipolar pulses, wherein rising edges of the key signal correspond to positive pulses, and falling edges of the key signal correspond to negative pulses.
Optionally, the frequency synthesis circuit includes a first frequency synthesizer and a second frequency synthesizer separately disposed, where the first frequency synthesizer and the second frequency synthesizer have different operating frequencies and share a fixed frequency reference signal.
Optionally, the pulse control switch circuit comprises a first transmission gate and a second transmission gate which are separately arranged;
the input end of the first transmission gate is connected with the first frequency synthesizer, the control end of the first transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the first transmission gate is connected with the transmitting antenna;
the input end of the second transmission gate is connected with a second frequency synthesizer, the control end of the second transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the second transmission gate is connected with a transmitting antenna;
when the digital edge pulse generator outputs positive pulses, the first transmission gate is conducted;
the second transmission gate is turned on when the digital edge pulse generator outputs a negative pulse.
The invention provides a real-time online key transmission device for a networking scene of an electric power terminal, which is characterized by comprising the transmitting end of any one of the first aspects, and further comprising a receiving end, wherein the receiving end comprises a receiving antenna and a frequency discriminator;
the receiving antenna is respectively connected with the transmitting antenna in a communication way and the frequency discriminator, the frequency discriminator detects the frequency of the received first sine wave signal or second sine wave signal, and generates corresponding positive pulses or negative pulses according to the frequency detection result, so as to generate a key square wave, and finally, the key stream which is actually transmitted is obtained according to the preset key square wave period.
Optionally, a signal period and a signal width of the first sine wave signal are defined as t 1 And T_width1, the signal period and the signal width of the second sine wave signal are respectively T 2 And T_width2;
the threshold value of the frequency discriminator isWherein (1)>
When the frequency discriminator detects the frequency based on the received first sine wave signal or second sine wave signal, the cycle number val-min or val-max is calculated, val-min or val-max is compared with val-th, corresponding positive pulse or negative pulse is generated according to the comparison result, so that a key square wave is generated, and finally the key stream which is actually transmitted is obtained according to the preset key square wave cycle.
Optionally, when val-min < val-th, generating a corresponding positive pulse; when val-max > val-th, a corresponding negative pulse is generated.
In a third aspect, the present invention provides a real-time online key transmission method for a networking scenario of an electric power terminal, including:
processing the input key signal into a bipolar pulse signal by using a digital edge pulse generator;
providing a first sine wave signal and a second sine wave signal with different frequencies by utilizing a frequency synthesis circuit;
the pulse control switching circuit is utilized to selectively output a first sine wave signal or a second sine wave signal according to the polarity of the pulse output by the digital edge pulse generator;
and transmitting the first sine wave signal or the second sine wave signal to a receiving end by using a transmitting antenna, so that the receiving end generates a key stream which is actually transmitted according to the first sine wave signal or the second sine wave signal.
Optionally, the digital edge pulse generator is an LC differential network, and differentiates edges of a key signal input in series into bipolar pulses, wherein rising edges of the key signal correspond to positive pulses, and falling edges of the key signal correspond to negative pulses.
Optionally, the frequency synthesis circuit includes a first frequency synthesizer and a second frequency synthesizer separately disposed, where the first frequency synthesizer and the second frequency synthesizer have different operating frequencies and share a fixed frequency reference signal.
Optionally, the pulse control switch circuit comprises a first transmission gate and a second transmission gate which are separately arranged;
the input end of the first transmission gate is connected with the first frequency synthesizer, the control end of the first transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the first transmission gate is connected with the transmitting antenna;
the input end of the second transmission gate is connected with a second frequency synthesizer, the control end of the second transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the second transmission gate is connected with a transmitting antenna;
when the digital edge pulse generator outputs positive pulses, the first transmission gate is conducted;
the second transmission gate is turned on when the digital edge pulse generator outputs a negative pulse.
In a fourth aspect, the present invention provides a real-time online key transmission method for a networking scenario of an electric power terminal, including:
processing the input key signal into a bipolar pulse signal by using a digital edge pulse generator;
providing a first sine wave signal and a second sine wave signal with different frequencies by utilizing a frequency synthesis circuit;
the pulse control switching circuit is utilized to selectively output a first sine wave signal or a second sine wave signal according to the polarity of the pulse output by the digital edge pulse generator;
transmitting the first sine wave signal or the second sine wave signal to a frequency discriminator by using a transmitting antenna and a receiving antenna;
and carrying out frequency detection on the received first sine wave signal or second sine wave signal by using a frequency discriminator, generating corresponding positive pulse or negative pulse according to a frequency detection result, generating a key square wave, and finally obtaining an actually transmitted key stream according to a preset key square wave period.
Optionally, a signal period and a signal width of the first sine wave signal are defined as t 1 And T_width1, the signal period and the signal width of the second sine wave signal are respectively T 2 And T_width2;
the threshold value of the frequency discriminator isWherein (1)>
When the frequency discriminator detects the frequency based on the received first sine wave signal or second sine wave signal, the cycle number val-min or val-max is calculated, val-min or val-max is compared with val-th, corresponding positive pulse or negative pulse is generated according to the comparison result, so that a key square wave is generated, and finally the key stream which is actually transmitted is obtained according to the preset key square wave cycle.
Optionally, when val-min < val-th, generating a corresponding positive pulse; when val-max > val-th, a corresponding negative pulse is generated.
Compared with the prior art, the invention has the beneficial effects that:
the real-time on-line key transmission device for the networking scene of the power terminal converts a key signal which is input in series into a polarized differential pulse waveform, realizes the rapid low-power consumption transmission of the power communication key by means of the pulse control switch circuit, the frequency integrated circuit, the transmitting antenna, the receiving antenna and the frequency discriminator, and effectively solves the problems of high energy consumption, long time consumption and the like of the key transmission in a wireless channel.
The real-time online key transmission device for the networking scene of the power terminal has the advantages of novel structure and universality, can be applied to the power 5G module, and realizes low-power consumption and real-time safe transmission of the power communication key.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings, in which:
fig. 1 is a schematic circuit diagram of a real-time online key transmission device facing a networking scenario of a power terminal according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The principle of application of the invention is described in detail below with reference to the accompanying drawings.
Example 1
The embodiment of the invention provides a real-time online key transmission device for a networking scene of an electric power terminal, which is shown in figure 1 and comprises a transmitting end, wherein the transmitting end comprises a digital edge pulse generator, a frequency synthesis circuit, a pulse control switch circuit and a transmitting antenna;
the digital edge pulse generator processes an input key signal into a bipolar pulse signal;
the frequency synthesis circuit provides a first sine wave signal and a second sine wave signal with different frequencies;
the pulse control switch circuit is respectively connected with the digital edge pulse generator and the frequency integrated circuit and selectively outputs a first sine wave signal or a second sine wave signal according to the polarity of the pulse output by the digital edge pulse generator;
the pulse control switch circuit is also used for transmitting the first sine wave signal or the second sine wave signal to a receiving end through a transmitting antenna, and the receiving end is used for generating a key stream which is actually transmitted based on the received first sine wave signal or the second sine wave signal.
In a specific implementation manner of the embodiment of the present invention, the digital edge pulse generator is an LC differential network, and differentiates edges of a key signal input in series into bipolar pulses, where rising edges of the key signal correspond to positive pulses and falling edges of the key signal correspond to negative pulses. In a specific implementation process, the Key signal key_in is a serial signal, and has a width of T, that is, each T time represents a binary 0 (low level) or 1 (high level), after the Key signal passes through the digital edge pulse generator, the digital edge pulse generator differentiates the Key signal, the rising edge (from low level to high level) differentiates the Key signal into positive pulses, the falling edge (from high level to low level) differentiates the Key signal into negative pulses, and then a polar pulse sequence is obtained and output to the pulse control switch circuit, the pulse control switch circuit selects the output of the frequency synthesis circuit according to the polarity of the received pulses, that is, each unit with a time of T, the pulse control switch circuit selects one output of the frequency synthesis circuit, outputs a section of sine wave to the antenna in the pulse time, and sends the sine wave to a wireless channel formed by the transmitting antenna and the receiving antenna, and the frequency characteristics of the transmitting antenna and the receiving antenna cover the frequencies of the two carriers. The calculation formula of the polar pulse sequence is as follows:
wherein u is R (t) is the output voltage across the resistor in the differential network, satisfying the product of the resistance value and the current value through the resistor, and is the capacitor charge-discharge current, satisfying the capacitor charge-discharge current formulaCan be approximated as +.>From the above equation, it can be seen that the output voltage is proportional to the inverse of the input voltage, and meets the requirement of processing the square wave signal into pulses.
In a specific implementation manner of the embodiment of the present invention, the frequency synthesis circuit includes a first frequency synthesizer and a second frequency synthesizer (i.e. formed by a dual-frequency analog phase-locked loop) separately disposed, where the first frequency synthesizer and the second frequency synthesizer have different operating frequencies, and share a fixed frequency reference signal. In the implementation process, the frequency synthesis circuit outputs two stable first sine wave signals FOUT0 and second sine wave signals FOUT1 with different frequencies through inputting sine wave FREE with stable frequency and using FCW0 and FCW1 as two paths of control signals (i.e. control words) with output frequency; the pulse control switching circuit gates the corresponding first frequency synthesizer or second frequency synthesizer according to the positive pulse or negative pulse output by the digital edge pulse generator, and sends the first sine wave signal FOUT0 or the second sine wave signal FOUT1 to the frequency discriminator, so that fout0=fref FCW0 and fout1=fref FCW1 are met.
In a specific implementation manner of the embodiment of the present invention, as shown in fig. 1, the pulse control switch circuit includes a first transmission gate and a second transmission gate that are separately disposed;
the input end of the first transmission gate is connected with the first frequency synthesizer, the control end of the first transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the first transmission gate is connected with the transmitting antenna;
the input end of the second transmission gate is connected with a second frequency synthesizer, the control end of the second transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the second transmission gate is connected with a transmitting antenna;
when the digital edge pulse generator outputs positive pulses, the first transmission gate is conducted;
the second transmission gate is turned on when the digital edge pulse generator outputs a negative pulse.
Example 2
The embodiment of the invention provides a real-time online key transmission device for a networking scene of an electric power terminal, which is shown in figure 1 and comprises a digital edge pulse generator, a frequency integrated circuit, a pulse control switch circuit, a transmitting antenna, a receiving antenna and a frequency discriminator;
the digital edge pulse generator processes an input key signal into a bipolar pulse signal;
the frequency synthesis circuit provides a first sine wave signal and a second sine wave signal with different frequencies;
the pulse control switch circuit is respectively connected with the digital edge pulse generator and the frequency integrated circuit and selectively outputs a first sine wave signal or a second sine wave signal according to the polarity of the pulse output by the digital edge pulse generator;
the pulse control switch circuit is also in communication connection with the frequency discriminator through the transmitting antenna and the receiving antenna, the frequency discriminator detects the frequency of the received first sine wave signal or the second sine wave signal, and generates corresponding positive pulse or negative pulse according to the frequency detection result, so as to generate a key square wave, and finally, according to the preset key square wave period, the key stream which is actually transmitted is obtained, namely, the key square wave time domain signal is converted into a digital key signal;
defining the signal period and the signal width of the first sine wave signal as t respectively 1 And T_width1, the signal period and the signal width of the second sine wave signal are respectively T 2 And T_width2;
the threshold value of the frequency discriminator isWherein (1)>
When the frequency discriminator detects the frequency based on the received first sine wave signal or second sine wave signal, the cycle number val-min or val-max is calculated, val-min or val-max is compared with val-th, corresponding positive pulse or negative pulse is generated according to the comparison result, so that a key square wave is generated, and finally the key stream which is actually transmitted is obtained according to the preset key square wave cycle.
When val-min is less than val-th, generating a corresponding positive pulse; when val-max > val-th, a corresponding negative pulse is generated.
In a specific implementation manner of the embodiment of the present invention, the digital edge pulse generator is an LC differential network, and differentiates edges of a key signal input in series into bipolar pulses, where rising edges of the key signal correspond to positive pulses and falling edges of the key signal correspond to negative pulses. In a specific implementation process, the Key signal key_in is a serial signal, and has a width of T, that is, each T time represents a binary 0 (low level) or 1 (high level), after the Key signal passes through the digital edge pulse generator, the digital edge pulse generator differentiates the Key signal, the rising edge (from low level to high level) differentiates the Key signal into positive pulses, the falling edge (from high level to low level) differentiates the Key signal into negative pulses, and then a polar pulse sequence is obtained and output to the pulse control switch circuit, the pulse control switch circuit selects the output of the frequency synthesis circuit according to the polarity of the received pulses, that is, each unit with a time of T, the pulse control switch circuit selects one output of the frequency synthesis circuit, outputs a section of sine wave to the antenna in the pulse time, and sends the sine wave to a wireless channel formed by the transmitting antenna and the receiving antenna, and the frequency characteristics of the transmitting antenna and the receiving antenna cover the frequencies of the two carriers. The calculation formula of the polar pulse sequence is as follows:
wherein u is R (t) is the output voltage across the resistor in the differential network, satisfying the product of the resistance value and the current value through the resistor, and is the capacitor charge-discharge current, satisfying the capacitor charge-discharge current formulaCan be approximated as +.>From the above equation, it can be seen that the output voltage is proportional to the inverse of the input voltage, and meets the requirement of processing the square wave signal into pulses.
In a specific implementation manner of the embodiment of the present invention, the frequency synthesis circuit includes a first frequency synthesizer and a second frequency synthesizer (i.e. formed by a dual-frequency analog phase-locked loop) separately disposed, where the first frequency synthesizer and the second frequency synthesizer have different operating frequencies, and share a fixed frequency reference signal. In the implementation process, the frequency synthesis circuit outputs two stable first sine wave signals FOUT0 and second sine wave signals FOUT1 with different frequencies through inputting sine wave FREE with stable frequency and using FCW0 and FCW1 as two paths of control signals (i.e. control words) with output frequency; the pulse control switching circuit gates the corresponding first frequency synthesizer or second frequency synthesizer according to the positive pulse or negative pulse output by the digital edge pulse generator, and sends the first sine wave signal FOUT0 or the second sine wave signal FOUT1 to the frequency discriminator, so that fout0=fref FCW0 and fout1=fref FCW1 are met.
In a specific implementation manner of the embodiment of the present invention, as shown in fig. 1, the pulse control switch circuit includes a first transmission gate and a second transmission gate that are separately disposed;
the input end of the first transmission gate is connected with the first frequency synthesizer, the control end of the first transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the first transmission gate is connected with the transmitting antenna;
the input end of the second transmission gate is connected with a second frequency synthesizer, the control end of the second transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the second transmission gate is connected with a transmitting antenna;
when the digital edge pulse generator outputs positive pulses, the first transmission gate is conducted;
the second transmission gate is turned on when the digital edge pulse generator outputs a negative pulse.
In a specific implementation of the embodiment of the present invention, the width T of the key signal is set to 1 microsecond, the reference frequency of the frequency synthesis circuit is 500MHz, the two frequency control words of the frequency synthesis circuit are 37 and 33 respectively, the pulse width is about 10ns, and the frequency output is selected according to the pulse polarity in this time range and sent to the wireless channel. Through the receiving antenna, the frequency discriminator counts 100 times, the time isThe carrier frequency is 1850MHz, corresponding to a positive pulse, high level for the next 1 microsecond period; if 100 times pass, the time is +.>Then the carrier frequency is 1650MHz, negative and the serial output end result is the key value.
Example 3
The embodiment of the invention provides a real-time online key transmission method for a networking scene of an electric power terminal, which comprises the following steps:
processing the input key signal into a bipolar pulse signal by using a digital edge pulse generator;
providing a first sine wave signal and a second sine wave signal with different frequencies by utilizing a frequency synthesis circuit;
the pulse control switching circuit is utilized to selectively output a first sine wave signal or a second sine wave signal according to the polarity of the pulse output by the digital edge pulse generator;
and transmitting the first sine wave signal or the second sine wave signal to a receiving end by using a transmitting antenna, so that the receiving end generates a key stream which is actually transmitted according to the first sine wave signal or the second sine wave signal.
In a specific implementation manner of the embodiment of the present invention, the digital edge pulse generator is an LC differential network, and differentiates edges of a key signal input in series into bipolar pulses, where rising edges of the key signal correspond to positive pulses and falling edges of the key signal correspond to negative pulses.
In a specific implementation manner of the embodiment of the present invention, the frequency synthesis circuit includes a first frequency synthesizer and a second frequency synthesizer that are separately disposed, where the working frequencies of the first frequency synthesizer and the second frequency synthesizer are different, and the first frequency synthesizer and the second frequency synthesizer share a reference signal with a fixed frequency.
In a specific implementation manner of the embodiment of the present invention, the pulse control switch circuit includes a first transmission gate and a second transmission gate that are separately disposed;
the input end of the first transmission gate is connected with the first frequency synthesizer, the control end of the first transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the first transmission gate is connected with the transmitting antenna;
the input end of the second transmission gate is connected with a second frequency synthesizer, the control end of the second transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the second transmission gate is connected with a transmitting antenna;
when the digital edge pulse generator outputs positive pulses, the first transmission gate is conducted;
the second transmission gate is turned on when the digital edge pulse generator outputs a negative pulse.
Example 4
The embodiment of the invention provides a real-time online key transmission method for a networking scene of an electric power terminal, which comprises the following steps:
processing the input key signal into a bipolar pulse signal by using a digital edge pulse generator;
providing a first sine wave signal and a second sine wave signal with different frequencies by utilizing a frequency synthesis circuit;
the pulse control switching circuit is utilized to selectively output a first sine wave signal or a second sine wave signal according to the polarity of the pulse output by the digital edge pulse generator;
transmitting the first sine wave signal or the second sine wave signal to a frequency discriminator by using a transmitting antenna and a receiving antenna;
and carrying out frequency detection on the received first sine wave signal or second sine wave signal by using a frequency discriminator, generating corresponding positive pulse or negative pulse according to a frequency detection result, generating a key square wave, and finally obtaining an actually transmitted key stream according to a preset key square wave period.
In a specific implementation manner of the embodiment of the present invention, the digital edge pulse generator is an LC differential network, and differentiates edges of a key signal input in series into bipolar pulses, where rising edges of the key signal correspond to positive pulses and falling edges of the key signal correspond to negative pulses.
In a specific implementation manner of the embodiment of the present invention, the frequency synthesis circuit includes a first frequency synthesizer and a second frequency synthesizer that are separately disposed, where the working frequencies of the first frequency synthesizer and the second frequency synthesizer are different, and the first frequency synthesizer and the second frequency synthesizer share a reference signal with a fixed frequency.
In a specific implementation manner of the embodiment of the present invention, the pulse control switch circuit includes a first transmission gate and a second transmission gate that are separately disposed;
the input end of the first transmission gate is connected with the first frequency synthesizer, the control end of the first transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the first transmission gate is connected with the transmitting antenna;
the input end of the second transmission gate is connected with a second frequency synthesizer, the control end of the second transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the second transmission gate is connected with a transmitting antenna;
when the digital edge pulse generator outputs positive pulses, the first transmission gate is conducted;
the second transmission gate is turned on when the digital edge pulse generator outputs a negative pulse.
Defining the signal period and the signal width of the first sine wave signal as t respectively 1 And T_width1, the signal period and the signal width of the second sine wave signal are respectively T 2 And T_width2;
the threshold value of the frequency discriminator isWherein the method comprises the steps of，/>
When the frequency discriminator detects the frequency based on the received first sine wave signal or second sine wave signal, the cycle number val-min or val-max is calculated, val-min or val-max is compared with val-th, corresponding positive pulse or negative pulse is generated according to the comparison result, so that a key square wave is generated, and finally the key stream which is actually transmitted is obtained according to the preset key square wave cycle.
When val-min is less than val-th, generating a corresponding positive pulse; when val-max > val-th, a corresponding negative pulse is generated.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (12)
1. The real-time online key transmission device for the networking scene of the power terminal is characterized by comprising a transmitting end, wherein the transmitting end comprises a digital edge pulse generator, a frequency integrated circuit, a pulse control switch circuit and a transmitting antenna;
the digital edge pulse generator processes an input key signal into a bipolar pulse signal;
the frequency synthesis circuit provides a first sine wave signal and a second sine wave signal with different frequencies;
the pulse control switch circuit is respectively connected with the digital edge pulse generator and the frequency integrated circuit and selectively outputs a first sine wave signal or a second sine wave signal according to the polarity of the pulse output by the digital edge pulse generator;
the pulse control switch circuit is also used for transmitting the first sine wave signal or the second sine wave signal to a receiving end through a transmitting antenna, and is used for enabling the receiving end to generate an actually transmitted key stream based on the received first sine wave signal or second sine wave signal, and the pulse control switch circuit also comprises a receiving end, wherein the receiving end comprises a receiving antenna and a frequency discriminator;
the receiving antenna is respectively connected with the transmitting antenna in a communication way and the frequency discriminator, the frequency discriminator detects the frequency of the received first sine wave signal or second sine wave signal, and generates corresponding positive pulses or negative pulses according to the frequency detection result, so as to generate a key square wave, and finally, the key stream which is actually transmitted is obtained according to the preset key square wave period.
2. The real-time online key transmission device for a networking scene of a power terminal according to claim 1, wherein the device comprises: defining the signal period and the signal width of the first sine wave signal as t respectively 1 And T_width1, the signal period and the signal width of the second sine wave signal are respectively T 2 And T_width2;
the threshold value of the frequency discriminator isWherein (1)>
When the frequency discriminator detects the frequency based on the received first sine wave signal or second sine wave signal, the cycle number val_min or val_max is calculated, val_min or val_max is compared with val_th, corresponding positive pulse or negative pulse is generated according to the comparison result, so that a key square wave is generated, and finally the key stream which is actually transmitted is obtained according to the preset key square wave cycle.
3. The real-time online key transmission device for the networking scene of the power terminal according to claim 2, wherein the device is characterized in that: when val_min is smaller than val_th, generating a corresponding positive pulse; when val_max > val_th, a corresponding negative pulse is generated.
4. The real-time online key transmission device for a networking scene of a power terminal according to claim 1, wherein the device comprises: the digital edge pulse generator is an LC differential network and is used for differentiating the edges of the key signals input in series into bipolar pulses, wherein the rising edges of the key signals correspond to positive pulses, and the falling edges of the key signals correspond to negative pulses.
5. The real-time online key transmission device for a networking scene of a power terminal according to claim 1, wherein the device comprises: the frequency synthesis circuit comprises a first frequency synthesizer and a second frequency synthesizer which are arranged separately, the working frequencies of the first frequency synthesizer and the second frequency synthesizer are different, and the first frequency synthesizer and the second frequency synthesizer share a reference signal with fixed frequency.
6. The real-time online key transmission device for a networking scene of a power terminal according to claim 1, wherein the device comprises: the pulse control switch circuit comprises a first transmission gate and a second transmission gate which are arranged separately;
the input end of the first transmission gate is connected with the first frequency synthesizer, the control end of the first transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the first transmission gate is connected with the transmitting antenna;
the input end of the second transmission gate is connected with a second frequency synthesizer, the control end of the second transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the second transmission gate is connected with a transmitting antenna;
when the digital edge pulse generator outputs positive pulses, the first transmission gate is conducted;
the second transmission gate is turned on when the digital edge pulse generator outputs a negative pulse.
7. The real-time online key transmission method for the networking scene of the power terminal is characterized by comprising the following steps of:
processing the input key signal into a bipolar pulse signal by using a digital edge pulse generator;
providing a first sine wave signal and a second sine wave signal with different frequencies by utilizing a frequency synthesis circuit;
the pulse control switching circuit is utilized to selectively output a first sine wave signal or a second sine wave signal according to the polarity of the pulse output by the digital edge pulse generator;
transmitting the first sine wave signal or the second sine wave signal to a receiving end by utilizing a transmitting antenna, so that the receiving end generates an actually transmitted key stream according to the first sine wave signal or the second sine wave signal; specifically: the receiving end comprises a receiving antenna and a frequency discriminator; the receiving antenna is respectively connected with the transmitting antenna and the frequency discriminator in a communication way, the frequency discriminator carries out frequency detection on the received first sine wave signal or second sine wave signal, and generates corresponding positive pulse or negative pulse according to the frequency detection result, thereby generating a key square wave, finally according to the preset key square wave period,
and obtaining the key stream actually transmitted.
8. The method for real-time online key transmission for power terminal networking scenarios of claim 7, wherein the digital edge pulse generator is an LC differential network, differentiating edges of a serially input key signal into bipolar pulses, wherein rising edges of the key signal correspond to positive pulses and falling edges of the key signal correspond to negative pulses.
9. The method for transmitting real-time online key in networking scenario of power terminal according to claim 7, wherein the frequency synthesis circuit comprises a first frequency synthesizer and a second frequency synthesizer which are separately arranged, the working frequencies of the first frequency synthesizer and the second frequency synthesizer are different, and the first frequency synthesizer and the second frequency synthesizer share a reference signal with fixed frequency.
10. The method for transmitting real-time online keys for a networking scenario of a power terminal according to claim 7, wherein the pulse-controlled switching circuit comprises a first transmission gate and a second transmission gate which are separately arranged;
the input end of the first transmission gate is connected with the first frequency synthesizer, the control end of the first transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the first transmission gate is connected with the transmitting antenna;
the input end of the second transmission gate is connected with a second frequency synthesizer, the control end of the second transmission gate is connected with the output end of the digital edge pulse generator, and the output end of the second transmission gate is connected with a transmitting antenna;
when the digital edge pulse generator outputs positive pulses, the first transmission gate is conducted;
the second transmission gate is turned on when the digital edge pulse generator outputs a negative pulse.
11. The method for real-time online key transmission in a networking scenario of a power terminal according to claim 7, wherein a signal period and a signal width of the first sine wave signal are defined as t respectively 1 And T_width1, the signal period and the signal width of the second sine wave signal are respectively T 2 And T_width2;
the threshold value of the frequency discriminator isWherein (1)>
When the frequency discriminator detects the frequency based on the received first sine wave signal or second sine wave signal, the cycle number val_min or val_max is calculated, val_min or val_max is compared with val_th, corresponding positive pulse or negative pulse is generated according to the comparison result, so that a key square wave is generated, and finally the key stream which is actually transmitted is obtained according to the preset key square wave cycle.
12. The method for transmitting the real-time online key for the networking scene of the power terminal according to claim 11, wherein the method comprises the following steps: when val_min is smaller than val_th, generating a corresponding positive pulse; when val_max > val_th, a corresponding negative pulse is generated.
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