CN105847207B - Unmanned aerial vehicle identity recognition device based on light wave information and information modulation and demodulation method - Google Patents
Unmanned aerial vehicle identity recognition device based on light wave information and information modulation and demodulation method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2096—Arrangements for directly or externally modulating an optical carrier
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
- G08G5/0043—Traffic management of multiple aircrafts from the ground
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
- G08G5/0047—Navigation or guidance aids for a single aircraft
- G08G5/0069—Navigation or guidance aids for a single aircraft specially adapted for an unmanned aircraft
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/502—LED transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
- H04B10/676—Optical arrangements in the receiver for all-optical demodulation of the input optical signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
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Abstract
The utility model provides an unmanned aerial vehicle identification device based on light wave information, there is the display screen casing one side, casing one end has objective and opening, the opening is in the objective below, the casing other end has the eyepiece, objective and eyepiece correspond each other, there is laser receiver head on the circuit board in the casing, the laser emission head, light signal receiver and control chip, there is the partial reflector in the casing, light is reflected to light signal receiver behind through objective to partial reflector, the tip of laser receiver head and laser emission head is in the opening. The unmanned aerial vehicle identity recognition device can modulate the unique identification code of the unmanned aerial vehicle into the LED optical signal by utilizing the existing LED equipment of the unmanned aerial vehicle, transmits information by utilizing light, and a ground supervisor locks the LED light source through the portable identity detection equipment, collects the light information emitted by the LED light source, demodulates and decrypts the unique identification code of the unmanned aerial vehicle to determine, thereby effectively matching with an air traffic control and related departments to realize the supervision of the unmanned aerial vehicle in a low airspace.
Description
Technical Field
The invention relates to the field of unmanned aerial vehicle corollary equipment, in particular to an unmanned aerial vehicle identity recognition device based on light wave information and an information modulation and demodulation method.
Background
Along with civil small-size unmanned aerial vehicle's development and popularization, more and more can see unmanned aerial vehicle's shadow in public occasion. The small unmanned aerial vehicle has small volume and good maneuverability, and can carry certain load to carry out low-altitude or ultra-low-altitude flight under the control of a human remote controller or an autopilot. The assembly cost and the entrance threshold are low, and particularly the microminiature aircraft with a simple structure causes the sales volume and the market share to be rapidly increased year by year. But one major problem that comes with it is how to supervise such a large number of civilian drones.
At present, the low-altitude field of China is not opened to private people, related regulatory regulations are not issued, and once the low-altitude field is opened, how to realize the identity recognition of an aircraft becomes a critical affair. Micro and small unmanned aerial vehicles are small in size, low in flying height and poor in radar detection effect. The unmanned aerial vehicle is restricted by the flight control technology, and the aircraft has potential safety hazards in the flight process. In addition, the unmanned aerial vehicle with the carrying capacity of more than 3KG has the capability of carrying destructive weapons (such as small-sized pistols and explosives), and is easy to be utilized by criminals. Unmanned aerial vehicles mostly pass through remote control, and once a safety accident or terrorist attack occurs, people in charge are difficult to search. Unmanned aerial vehicles sold by regular manufacturers can trace sources because commercial complete machines have self numbers and are associated with the identities of purchasers, but the identities of the unmanned aerial vehicles assembled by private persons cannot be identified at all. Even with registered drones, there is still a lack of a method of informing the regulatory authorities or law enforcement officers of their identity in real time during their flight. In order to reasonably manage and control the market of the unmanned aerial vehicle and provide convenience for traffic control in the low-altitude field in future, a convenient and effective method is needed to enable mobile supervision personnel to identify the identity of the unmanned aerial vehicle in the current visual airspace. Unmanned aerial vehicle is in self flight safety and considers the LED lamp of can all carry by most, and some are for distinguishing aircraft nose tail direction, and some then are the safety indicator as flying at night, and the state of these LED lamps of during operation is all more single, usually for often bright or regular scintillation. Because LED response time is short, but high-speed modulation, low-power consumption, longe-lived, size are little, can send the high-speed light and shade scintillation signal that the naked eye can not feel and be used for the transmission information, consequently can design corresponding unmanned aerial vehicle identity recognition device, come to discern the control to unmanned aerial vehicle.
Disclosure of Invention
In order to solve the existing problems, the invention provides an unmanned aerial vehicle identity recognition device based on light wave information and an information modulation and demodulation method, the unmanned aerial vehicle identity recognition device utilizes the existing LED equipment of the unmanned aerial vehicle, the unique identification code of the unmanned aerial vehicle can be modulated into an LED optical signal, the information is transmitted by light, a ground supervisor locks an LED light source through portable identity detection equipment, the light information transmitted by the LED light source is collected, the unique identification code of the unmanned aerial vehicle is restored through demodulation and decryption to be determined, and the portable identity recognizer can also simultaneously output the linear distance between a target aircraft and a measuring point, so that the tracking is convenient. The invention provides an unmanned aerial vehicle identity recognition device based on light wave information, which can be effectively matched with an air tube and related departments to realize supervision of an unmanned aerial vehicle in a low airspace, and comprises a shell, a display screen, an objective lens, a laser receiving head, a laser emitting head, a semi-transparent reflector, an eyepiece, an optical signal receiver and a control chip, wherein the display screen is arranged on one side of the shell, the objective lens and an opening are arranged at one end of the shell, the opening is arranged below the objective lens, the eyepiece lens is arranged at the other end of the shell, the objective lens and the eyepiece correspond to each other, the laser receiving head, the laser emitting head, the optical signal receiver and the control chip are arranged on a circuit board in the shell, the semi-transparent reflector is arranged in the shell, light is reflected to the optical signal receiver after passing through the objective lens to the semi-transparent reflector, and the end parts of the laser receiving head and the laser emitting head are arranged in the opening.
According to the invention, the airplane controller of the unmanned aerial vehicle, which can be identified by the unmanned aerial vehicle identity identification device based on light wave information, is connected with a lamp belt or a single LED lamp.
According to the further improvement of the invention, the display screen is a foldable display screen, the end part of the foldable display screen is connected with the side surface of the shell through a hinge, and the foldable display screen can be arranged for convenient carrying.
In a further improvement of the present invention, the optical signal receiver is an LED receiving chip or a CDD chip, and the optical signal receiver of the present invention can be an LED receiving chip or a CDD chip.
According to the further improvement of the invention, the circuit board in the shell is also provided with a GPS chip, and the GPS chip is arranged to receive the linear distance from the portable identity recognizer to the measuring point, so that the portable identity recognizer can output the target aircraft, and the tracking is convenient.
An information modulation and demodulation method of an unmanned aerial vehicle identity recognition device based on light wave information comprises the following specific steps:
1) The unmanned aerial vehicle combines the identification number of the unmanned aerial vehicle and other related information into a data frame with a corresponding format, and then the data frame is compiled into a Manchester code, and the Manchester code of the data frame is modulated onto a carrier wave with corresponding frequency and is emitted by an LED;
firstly, the carrier frequency f is determined according to the type of the LED used for emitting light information by the unmanned aerial vehicle end L Wherein f is L Should be less than the communication bandwidth G allowed by the color LED c ;
Secondly, setting the identification number of the unmanned aerial vehicle as an n-bit hexadecimal number, converting the identification number data length n, the identification number and the check code into binary codes, and splicing the binary codes in sequence to form a group of complete data frames;
then, the binary data frame obtained in the above process is converted into a Manchester code format, wherein the jump from 1 to 0 represents the digit 1, the jump from 0 to 1 represents the digit 0, and a data synchronization bit is added at the front end of the Manchester code sequence, wherein the data synchronization bit is n 1 A binary 1, a data stop bit is added at the rear end, and the data stop bit is n 2 Binary 0, then modulating the combined Manchester code sequence onto a carrier wave by using a digital modulator;
finally, controlling the current flowing through the LED through a driving circuit according to the carrier signal, and emitting binary information by the on and off of the LED;
2) The LED light information is collected in the sight distance through a receiving end in the unmanned aerial vehicle identity recognition device, and the light intensity emitted by an LED is determined by the following formula:
I(φ)=I(0)cos m (φ);
wherein I (0) is the central luminous intensity of the LED, phi is the radiation angle, and m is the Lambert radiation order;
3) Collecting the light intensity emitted by an onboard LED by using a photosensitive device, converting the on and off of the LED into corresponding digital quantity 0 or 1, setting a timer of a receiving end according to a carrier frequency agreed in advance, enabling the photosensitive device to sample once every T/2 time, wherein T is the time occupied by each binary data bit, capturing the jump of each Manchester code by using the method, capturing an effective data frame by searching for a synchronization bit, and finally finishing the receiving process according to a data stop bit;
4) And according to the encoding protocol of the Manchester code, the effective data frame is decoded and restored to be in a common binary format, and finally the unmanned aerial vehicle identification number is obtained.
In a further development of the invention, in the first step, the LED type is determined by the color of the LED, and generally, the LED type is mainly determined by the color of the LED.
The invention is further improved, the data length n of the identification number, the identification number and the check code are converted into binary codes in the first step, the data content is encrypted through a secret key in the process of splicing the binary codes in sequence, and the effective data frame is decrypted in the process of decoding and restoring the effective data frame into a common binary format in the fourth step after the encryption, so that secret key encryption can be carried out in the identification process.
The invention relates to an unmanned aerial vehicle identity recognition device based on light wave information, which comprises the following working processes: and the airborne optical information transmitting module encrypts the unique identification number of the unmanned aerial vehicle to obtain a ciphertext, modulates the ciphertext into an LED high-frequency flickering optical signal and transmits the optical signal to the outside. Ground supervise personnel manual operation portable identification ware makes the LED light source of organism clear visible and the size is suitable in the eyepiece through adjusting the device that zooms, then manually presses the fuselage button in order to trigger range finding and identification function. The portable identity recognizer demodulates and decrypts the captured optical information to obtain effective identification number information, the identification number is transmitted back to the data center through the 3G network to be inquired, and then the relevant registration information of the owner and the aircraft can be obtained, the information and the ranging result are displayed on the display screen, and the portable identity recognizer can also output the linear distance between the target aircraft and the measuring point at the same time, so that the tracking is convenient. The method can be effectively matched with an air pipe and related departments to realize the supervision of the unmanned aerial vehicle in the low airspace.
Drawings
FIG. 1 is a schematic of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic diagram of the present invention;
in the figure:
1. a housing 2, a foldable display screen; 3. An objective lens; 4. An opening;
5. a laser receiving head; 6. A laser emitting head; 7. A semi-transparent mirror; 8. An eyepiece;
9. an optical signal receiver; 10. A control chip; 11. And a GPS chip.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
the invention provides an unmanned aerial vehicle identity recognition device based on light wave information and an information modulation and demodulation method, the unmanned aerial vehicle identity recognition device utilizes the existing LED equipment of an unmanned aerial vehicle to modulate a unique identification code of the unmanned aerial vehicle into an LED optical signal, information is spread out by utilizing light, a ground supervisor locks an LED light source through portable identity detection equipment, light information sent by the LED light source is collected, the unique identification code of the unmanned aerial vehicle is restored through demodulation and decryption to be determined, and the portable identity recognizer can also simultaneously output the linear distance between a target aircraft and a measuring point, so that the tracking is convenient. The method can be effectively matched with the air pipe and related departments to realize the supervision of the unmanned aerial vehicle in the low airspace.
The invention provides an unmanned aerial vehicle identity recognition device based on light wave information, which comprises a shell 1, a display screen, an objective lens 3, a laser receiving head 5, a laser emitting head 6, a semi-transparent reflector 7, an eyepiece 8, an optical signal receiver 9 and a control chip 10, wherein the display screen is arranged on one side of the shell 1, the objective lens 3 and an opening 4 are arranged at one end of the shell 1, the opening 4 is arranged below the objective lens 3, the eyepiece 8 is arranged at the other end of the shell 1, the objective lens 3 corresponds to the eyepiece 8, the laser receiving head 5, the laser emitting head 6, the optical signal receiver 9 and the control chip 10 are arranged on a circuit board in the shell 1, the semi-transparent reflector 7 is arranged in the shell 1, light is reflected to the optical signal receiver 9 after passing through the objective lens 3 and the semi-transparent reflector 7, and the end parts of the laser receiving head 5 and the laser emitting head 6 are arranged in the opening 4.
As an embodiment of the present invention, the present invention provides an unmanned aerial vehicle identification device based on light wave information as shown in fig. 1 and fig. 2, which includes a housing 1, a display screen, an objective lens 3, a laser receiving head 5, a laser emitting head 6, a semi-transparent reflector 7, an eyepiece 8, an optical signal receiver 9 and a control chip 10, wherein one side of the housing 1 is provided with the display screen, the display screen is a foldable display screen 2, the end of the foldable display screen 2 is connected to the side of the housing 1 through a hinge, so as to facilitate carrying and setting of the foldable display screen, one end of the housing 1 is provided with the objective lens 3 and the opening 4, the opening 4 is below the objective lens 3, the other end of the housing 1 is provided with the eyepiece 8, the objective lens 3 and the eyepiece 8 correspond to each other, a circuit board in the housing 1 is provided with the laser receiving head 5, the laser emitting head 6, the optical signal receiver 9 and the control chip 10, the semi-transparent reflector 7 is arranged in the housing 1, light is reflected to the optical signal receiver 9 after passing through the objective lens 3 to the semi-transparent reflector 7, the optical signal receiver is an LED receiving chip or a CDD chip, and a GPS receiver chip is arranged on the housing, so as to facilitate the GPS receiver chip, and the GPS receiver chip is arranged on the end of the GPS chip, and the GPS receiver chip.
The unmanned aerial vehicle controller capable of being identified by the unmanned aerial vehicle identity identification device based on the light wave information is connected with a lamp belt or a single LED lamp.
The invention discloses an information modulation and demodulation method of an unmanned aerial vehicle identity recognition device based on light wave information, which is shown in figure 3 and comprises the following specific steps:
1) The unmanned aerial vehicle combines the identification number of the unmanned aerial vehicle and other related information into a data frame with a corresponding format, and then the data frame is compiled into a Manchester code, and the Manchester code of the data frame is modulated onto a carrier wave with corresponding frequency and is transmitted by an LED;
firstly, the carrier frequency f is determined according to the type of the LED used for emitting light information by the unmanned aerial vehicle end L The LED type is determined by the color of the LED, and generally the LED type is mainly determined by the color of the LED, wherein f L Should be less than the communication bandwidth G allowed by the color LED c ;
Secondly, setting the identification number of the unmanned aerial vehicle as an n-bit hexadecimal number, converting the data length n of the identification number, the identification number and the check code into binary codes, and splicing the binary codes in sequence to form a group of complete data frames;
then, the binary data frame obtained in the above process is converted into a Manchester code format, wherein the jump from 1 to 0 represents the digit 1, the jump from 0 to 1 represents the digit 0, and a data synchronization bit is added at the front end of the Manchester code sequence, wherein the data synchronization bit is n 1 A binary 1, a data stop bit is added at the rear end, and the data stop bit is n 2 Binary 0, then modulating the combined Manchester code sequence onto a carrier wave by using a digital modulator;
finally, controlling the current flowing through the LED through a driving circuit according to the carrier signal, and emitting binary information by the on and off of the LED;
2) The LED light information is collected in the sight distance through a receiving end in the unmanned aerial vehicle identity recognition device, and the light intensity emitted by an LED is determined by the following formula:
I(φ)=I(0)cos m (φ);
wherein I (0) is the central luminous intensity of the LED, phi is the radiation angle, and m is the Lambert radiation order;
3) Collecting the light intensity emitted by an onboard LED by using a photosensitive device, converting the on and off of the LED into corresponding digital quantity 0 or 1, setting a timer of a receiving end according to a carrier frequency agreed in advance, enabling the photosensitive device to sample once every T/2 time, wherein T is the time occupied by each binary data bit, capturing the jump of each Manchester code by using the method, capturing an effective data frame by searching for a synchronization bit, and finally finishing the receiving process according to a data stop bit;
4) And according to the encoding protocol of the Manchester code, decoding the effective data frame to restore the effective data frame to a common binary format, and finally obtaining the unmanned aerial vehicle identification number.
The invention is further improved, the data length n of the identification number, the identification number and the check code are converted into binary codes in the first step, the data content is encrypted through a secret key in the process of splicing the binary codes in sequence, and the effective data frame is decrypted in the process of decoding and restoring the effective data frame into a common binary format in the fourth step after the encryption, so that secret key encryption can be carried out in the identification process.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any modifications or equivalent variations made in accordance with the technical spirit of the present invention are within the scope of the present invention as claimed.
Claims (3)
1. Unmanned aerial vehicle identification device based on light wave information, including casing (1), display screen, objective (3), laser receiving head (5), laser emission head (6), half-transparent mirror (7), eyepiece (8), light signal receiver (9) and control chip (10), its characterized in that: there is the display screen casing (1) one side, casing (1) one end has objective (3) and opening (4), opening (4) are in objective (3) below, there is eyepiece (8) casing (1) other end, objective (3) and eyepiece (8) correspond each other, there are laser receiver head (5), laser emitter head (6), light signal receiver (9) and control chip (10) on the circuit board in casing (1), there is semi-transparent reflector (7) in casing (1), and light passes through objective (3) and reflects to light signal receiver (9) behind semi-transparent reflector (7), the tip of laser receiver head (5) and laser emitter head (6) is in opening (4);
an airplane controller of the unmanned aerial vehicle, which can be identified by the unmanned aerial vehicle identity identification device based on the light wave information, is connected with a lamp strip or a single LED lamp;
the display screen is a foldable display screen (2), and the end part of the foldable display screen (2) is connected with the side surface of the shell (1) through a hinge;
the optical signal receiver (9) is an LED receiving chip or a CDD chip;
and a GPS chip (11) is also arranged on the circuit board in the shell (1).
2. The information modulation and demodulation method of the unmanned aerial vehicle identification device based on the light wave information as claimed in claim 1 comprises the following specific steps:
1) The unmanned aerial vehicle combines the identification number of the unmanned aerial vehicle and other related information into a data frame with a corresponding format, and then the data frame is compiled into a Manchester code, and the Manchester code of the data frame is modulated onto a carrier wave with corresponding frequency and is transmitted by an LED; firstly, the carrier frequency f is determined according to the type of the LED used for emitting light information by the unmanned aerial vehicle end L The LED type is determined by the color of the LED, wherein f L Should be less than the communication bandwidth G allowed by the color LED c (ii) a Secondly, setting the identification number of the unmanned aerial vehicle as an n-bit hexadecimal number, converting the identification number data length n, the identification number and the check code into binary codes, and splicing the binary codes in sequence to form a group of complete data frames; then, the binary data frame obtained in the above process is converted into a Manchester code format, wherein the jump from 1 to 0 represents the digit 1, the jump from 0 to 1 represents the digit 0, and a data synchronization bit is added at the front end of the Manchester code sequence, wherein the data synchronization bit is n 1 A binary 1, a data stop bit is added at the rear end, and the data stop bit is n 2 Binary 0, then modulating the combined Manchester code sequence onto a carrier wave by using a digital modulator; finally, controlling the current flowing through the LED through a driving circuit according to the carrier signal, and emitting binary information by the on and off of the LED;
2) The LED light information is collected in the sight distance through a receiving end in the unmanned aerial vehicle identity recognition device, and the light intensity emitted by an LED is determined by the following formula:;
wherein I (0) is the central luminous intensity of the LED,the radiation angle is defined, and m is a Lambert radiation series;
3) Collecting the light intensity emitted by an onboard LED by using a photosensitive device, converting the on and off of the LED into corresponding digital quantity 0 or 1, setting a timer of a receiving end according to a carrier frequency appointed in advance, enabling the photosensitive device to sample once at intervals of T/2, wherein T is the time occupied by each binary data bit, capturing the jump of each Manchester code by using the method, capturing an effective data frame by searching for a synchronization bit, and ending the receiving process according to a data stop bit;
4) And according to the encoding protocol of the Manchester code, decoding the effective data frame to restore the effective data frame to a common binary format, and finally obtaining the unmanned aerial vehicle identification number.
3. The information modulation and demodulation method of the unmanned aerial vehicle identification device based on the light wave information as claimed in claim 2, wherein: step 1) the data length n of the identification number, the identification number and the check code are converted into binary codes, the data content is encrypted through a secret key in the process of splicing in sequence, and after the encryption is set, the effective data frame is decrypted in the process of reducing the effective data frame into the common binary format in step four.
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