CN113593394A - Laser communication experiment teaching system - Google Patents
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- CN113593394A CN113593394A CN202110887482.7A CN202110887482A CN113593394A CN 113593394 A CN113593394 A CN 113593394A CN 202110887482 A CN202110887482 A CN 202110887482A CN 113593394 A CN113593394 A CN 113593394A
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- 238000002474 experimental method Methods 0.000 title claims abstract description 20
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
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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
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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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
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/85—Protection from unauthorised access, e.g. eavesdrop protection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
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Abstract
The invention discloses a laser communication experiment teaching system, which comprises a laser communication fixing unit arranged on a demonstration table and a laser communication moving unit arranged on a demonstration frame and capable of performing information interaction with the laser communication fixing unit; the laser communication fixing unit comprises a laser communication transmitting module, an aiming capturing and tracking module and a control module; the laser communication transmitting module comprises a laser transmitting module and a signal processing subsystem, the laser transmitting module is connected with the signal processing subsystem, and the signal processing subsystem is connected with a rear-end server of the fixed unit through a gateway. Has the advantages that: the laser communication fixing unit is fixed on the demonstration table, the laser communication mobile unit can move randomly, and the laser communication mobile unit can receive signals sent by the laser communication fixing unit in real time in the moving process and display the signals on the display screen to be displayed to the learner, so that the learner can understand the signals.
Description
Technical Field
The invention relates to the technical field of optical communication equipment, in particular to a laser communication experiment teaching system.
Background
The laboratory of higher school is responsible for cultivating high-grade special talents, improving the practical ability and the innovation ability of students and implementing the important task of quality education, is an important component of the teaching and scientific research work of school and is an important base for knowledge innovation and technical development.
Optical wireless communication is a novel communication technology, has optical fiber communication and mobile communication's advantage simultaneously, can realize broadband transmission, and the network deployment is flexible, need not the frequency application to anti-electromagnetic interference, the security is good, has consequently received extensive attention to wireless optical communication's research now. In addition, the light source for the medium-short distance optical wireless communication also has the advantages of low power consumption, long service life, low cost and the like; with the rapid development of optical communication specialties, laboratory construction work is very important. The state of the laboratory configuration will play an important role in developing the expertise of the student. Due to the high cost required for configuring the experimental facilities, only some key universities establish optical communication key laboratories and are equipped with some experimental facilities, and most colleges have not established laboratories and experimental facilities capable of providing optical communication specialties.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a laser communication experiment teaching system.
In order to achieve the purpose, the invention adopts the following technical scheme: the laser communication experiment teaching system comprises a laser communication fixing unit arranged on a demonstration table and a laser communication moving unit which is arranged on a demonstration frame and can perform information interaction with the laser communication fixing unit;
the laser communication fixing unit comprises a laser communication transmitting module, an aiming capturing and tracking module and a control module;
the laser communication transmitting module comprises a laser transmitting module and a signal processing subsystem, the laser transmitting module is connected with the signal processing subsystem, and the signal processing subsystem is connected with a rear-end server of the fixed unit through a gateway;
the laser communication mobile unit comprises at least one display module, a laser communication receiving module and a control module, wherein the display module and the laser communication receiving module are respectively connected with the control module, and the control module is connected with a demonstration network; the display module comprises a display screen and a signal processing subsystem, the display screen is connected with the signal processing subsystem, and the signal processing subsystem is connected with the control module.
In the above-mentioned laser communication experiment teaching system, the laser emission module includes a digital signal receiving unit and an optical modulation unit, the digital signal receiving unit receives the digital signal sent from the signal processing subsystem, filters and amplifies the digital signal, and sends the filtered and amplified digital signal to the optical modulation unit;
the light modulation unit superposes the received signal on a driving current signal of the laser LED to drive the LED lamp to emit light, so that the signal is modulated onto light to be transmitted; the aiming, capturing and tracking module comprises a camera module and a signal processing subsystem, wherein the camera module is connected with the signal processing subsystem and is used for transmitting the acquired image data to the signal processing subsystem;
the signal processing subsystem receives information transmitted from the digital signal wire, modulates and moves the signal to a proper frequency band, and transmits the signal to the laser emission module; meanwhile, receiving a signal from a camera, extracting information from an image, and transmitting the information to a control module or even a gateway through a digital signal line; the control module is used for executing an aiming, capturing and tracking algorithm and adjusting the angle of the mechanical holder subsystem.
In the above-mentioned laser communication experiment teaching system, the laser communication receiving module includes a photoelectric detection module and a signal processing subsystem, the photoelectric detection module is connected with the signal processing subsystem, and the signal processing subsystem is connected with the control module;
the photoelectric detection module comprises a light detector, a receiving circuit and a digital signal sending unit, wherein the light detector receives the laser signal sent by the fixing unit, converts the laser signal into an electric signal, transmits the electric signal to the receiving circuit for filtering and amplifying, and transmits the electric signal to the signal processing subsystem through the digital signal sending unit; the signal processing subsystem of the laser communication mobile unit receives the information transmitted from the control module through the digital signal wire, converts the signal into a corresponding image and transmits the image to the display screen; meanwhile, signals transmitted from the laser communication receiving module are received, demodulated and moved to a baseband, and then information is transmitted to the control module and even the demonstration network through the digital signal wire; the control module is used for coordinating information transmission between the display module and the demonstration network and between the laser communication receiving module and the demonstration network.
In the above-mentioned laser communication experiment teaching system, the system further comprises a movable bypass end, the bypass end comprises a bypass communication receiving module and a display module, the bypass communication receiving module comprises a photoelectric detection module and a signal processing subsystem, the photoelectric detection module is connected with the signal processing subsystem, and the signal processing subsystem is connected with the control module;
the photoelectric detection module comprises a light detector, a receiving circuit and a digital signal sending unit, wherein the light detector receives the laser signal sent by the fixing unit, converts the laser signal into an electric signal, transmits the electric signal to the receiving circuit for filtering and amplifying, and transmits the electric signal to the signal processing subsystem through the digital signal sending unit; the signal processing subsystem of the laser communication mobile unit receives the information transmitted from the control module through the digital signal wire, converts the signal into a corresponding image and transmits the image to the display screen; meanwhile, signals transmitted from the laser communication receiving module are received, demodulated and moved to a baseband, and then information is transmitted to the control module and even the demonstration network through the digital signal wire; the control module is used for coordinating information transmission between the display module and the demonstration network and between the laser communication receiving module and the demonstration network.
In the above-mentioned laser communication experiment teaching system, the laser communication fixing unit further includes an encryption module, the encryption module encrypts the source data using a quantum key or encrypts the source data using a classical password, the encryption module receives and encrypts the data transmitted by the digital signal receiving unit, and the encrypted data is input to the optical modulation unit.
In the above-mentioned laser communication experiment teaching system, the signal processing subsystem includes a decryption module, and the decryption module decrypts a signal input by the digital signal transmission unit using a classical password shared with the laser communication fixing unit, and then converts the decrypted signal into a corresponding image, and transmits the image to the display screen.
In the above-mentioned laser communication experimental teaching system, the laser communication fixed unit and the laser communication mobile unit are respectively configured with a quantum key distribution terminal Alice and a quantum key distribution terminal Bob, and the quantum key distribution terminal Alice and the quantum key distribution terminal Bob distribute the same quantum key for both the transmitting end and the receiving end based on the BB84 protocol; the quantum key distribution terminal Alice is connected with the encryption module, and the generated quantum key is used for the laser communication fixing unit to encrypt data; and the quantum key distribution terminal Bob is connected with the decryption module, and the generated quantum key is used for the laser communication mobile unit to decrypt data.
Compared with the prior art, the invention has the advantages that:
in the system, the laser communication fixing unit is fixed on the demonstration table, the laser communication mobile unit can move randomly, the laser communication mobile unit can receive signals sent by the laser communication fixing unit in real time in the moving process and display the signals on the display screen to be displayed to a learner, so that the learner can understand the signals.
Drawings
Fig. 1 is a schematic block diagram of a laser communication fixing unit in a laser communication experiment teaching system provided by the present invention;
fig. 2 is a schematic block diagram of a laser communication mobile unit in the laser communication experimental teaching system provided by the present invention.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Examples
Referring to fig. 1-2, the laser communication experiment teaching system comprises a laser communication fixing unit arranged on a demonstration table and a laser communication moving unit arranged on a demonstration frame and capable of performing information interaction with the laser communication fixing unit;
the laser communication fixing unit comprises a laser communication transmitting module, an aiming capturing and tracking module and a control module;
the laser communication transmitting module comprises a laser transmitting module and a signal processing subsystem, the laser transmitting module is connected with the signal processing subsystem, and the signal processing subsystem is connected with a rear-end server of the fixed unit through a gateway;
the laser communication mobile unit comprises at least one display module, a laser communication receiving module and a control module, wherein the display module and the laser communication receiving module are respectively connected with the control module, and the control module is connected with a demonstration network; the display module comprises a display screen and a signal processing subsystem, the display screen is connected with the signal processing subsystem, and the signal processing subsystem is connected with the control module.
The laser emission module comprises a digital signal receiving unit and an optical modulation unit, wherein the digital signal receiving unit receives a digital signal sent from the signal processing subsystem, filters and amplifies the digital signal and sends the filtered and amplified digital signal to the optical modulation unit;
the light modulation unit superposes the received signal on a driving current signal of the laser LED to drive the LED lamp to emit light, so that the signal is modulated onto light to be transmitted; the aiming, capturing and tracking module comprises a camera module and a signal processing subsystem, wherein the camera module is connected with the signal processing subsystem and is used for transmitting the acquired image data to the signal processing subsystem;
the signal processing subsystem receives information transmitted from the digital signal wire, modulates and moves the signal to a proper frequency band, and transmits the signal to the laser emission module; meanwhile, receiving a signal from a camera, extracting information from an image, and transmitting the information to a control module or even a gateway through a digital signal line; the control module is used for executing an aiming, capturing and tracking algorithm and adjusting the angle of the mechanical holder subsystem.
The laser communication receiving module comprises a photoelectric detection module and a signal processing subsystem, the photoelectric detection module is connected with the signal processing subsystem, and the signal processing subsystem is connected with the control module;
the photoelectric detection module comprises a light detector, a receiving circuit and a digital signal sending unit, wherein the light detector receives the laser signal sent by the fixing unit, converts the laser signal into an electric signal, transmits the electric signal to the receiving circuit for filtering and amplifying, and transmits the electric signal to the signal processing subsystem through the digital signal sending unit; the signal processing subsystem of the laser communication mobile unit receives the information transmitted from the control module through the digital signal wire, converts the signal into a corresponding image and transmits the image to the display screen; meanwhile, signals transmitted from the laser communication receiving module are received, demodulated and moved to a baseband, and then information is transmitted to the control module and even the demonstration network through the digital signal wire; the control module is used for coordinating information transmission between the display module and the demonstration network and between the laser communication receiving module and the demonstration network.
The system also comprises a movable bypass end, wherein the bypass end comprises a bypass communication receiving module and a display module, the bypass communication receiving module comprises a photoelectric detection module and a signal processing subsystem, the photoelectric detection module is connected with the signal processing subsystem, and the signal processing subsystem is connected with the control module;
the photoelectric detection module comprises a light detector, a receiving circuit and a digital signal sending unit, wherein the light detector receives the laser signal sent by the fixing unit, converts the laser signal into an electric signal, transmits the electric signal to the receiving circuit for filtering and amplifying, and transmits the electric signal to the signal processing subsystem through the digital signal sending unit; the signal processing subsystem of the laser communication mobile unit receives the information transmitted from the control module through the digital signal wire, converts the signal into a corresponding image and transmits the image to the display screen; meanwhile, signals transmitted from the laser communication receiving module are received, demodulated and moved to a baseband, and then information is transmitted to the control module and even the demonstration network through the digital signal wire; the control module is used for coordinating information transmission between the display module and the demonstration network and between the laser communication receiving module and the demonstration network.
The laser communication fixing unit further comprises an encryption module, the encryption module encrypts the source data by using a quantum key or encrypts the source data by using a classical password, the encryption module receives and encrypts data transmitted by the digital signal receiving unit, and the encrypted data are input into the optical modulation unit.
The signal processing subsystem comprises a decryption module, the decryption module decrypts the signal input by the digital signal sending unit by using a classic password shared by the laser communication fixing unit, and then converts the decrypted signal into a corresponding image and transmits the image to the display screen.
The laser communication fixed unit and the laser communication mobile unit are respectively provided with a quantum key distribution terminal Alice and a quantum key distribution terminal Bob, and the quantum key distribution terminal Alice and the quantum key distribution terminal Bob distribute the same quantum key for the transmitting end and the receiving end based on a BB84 protocol; the quantum key distribution terminal Alice is connected with the encryption module, and the generated quantum key is used for the laser communication fixing unit to encrypt data; and the quantum key distribution terminal Bob is connected with the decryption module, and the generated quantum key is used for the laser communication mobile unit to decrypt data.
In the system, the laser communication fixing unit is fixed on the demonstration table, the laser communication mobile unit can move randomly, the laser communication mobile unit can receive signals sent by the laser communication fixing unit in real time in the moving process and display the signals on the display screen to be displayed to a learner, so that the learner can understand the signals.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (7)
1. The laser communication experiment teaching system is characterized by comprising a laser communication fixing unit arranged on a demonstration table and a laser communication moving unit which is arranged on a demonstration frame and can perform information interaction with the laser communication fixing unit;
the laser communication fixing unit comprises a laser communication transmitting module, an aiming capturing and tracking module and a control module;
the laser communication transmitting module comprises a laser transmitting module and a signal processing subsystem, the laser transmitting module is connected with the signal processing subsystem, and the signal processing subsystem is connected with a rear-end server of the fixed unit through a gateway;
the laser communication mobile unit comprises at least one display module, a laser communication receiving module and a control module, wherein the display module and the laser communication receiving module are respectively connected with the control module, and the control module is connected with a demonstration network; the display module comprises a display screen and a signal processing subsystem, the display screen is connected with the signal processing subsystem, and the signal processing subsystem is connected with the control module.
2. The laser communication experiment teaching system according to claim 1, wherein the laser emitting module comprises a digital signal receiving unit and an optical modulation unit, the digital signal receiving unit receives the digital signal sent from the signal processing subsystem, filters and amplifies the digital signal, and sends the filtered and amplified digital signal to the optical modulation unit;
the light modulation unit superposes the received signal on a driving current signal of the laser LED to drive the LED lamp to emit light, so that the signal is modulated onto light to be transmitted; the aiming, capturing and tracking module comprises a camera module and a signal processing subsystem, wherein the camera module is connected with the signal processing subsystem and is used for transmitting the acquired image data to the signal processing subsystem;
the signal processing subsystem receives information transmitted from the digital signal wire, modulates and moves the signal to a proper frequency band, and transmits the signal to the laser emission module; meanwhile, receiving a signal from a camera, extracting information from an image, and transmitting the information to a control module or even a gateway through a digital signal line; the control module is used for executing an aiming, capturing and tracking algorithm and adjusting the angle of the mechanical holder subsystem.
3. The laser communication experiment teaching system of claim 2, wherein the laser communication receiving module comprises a photoelectric detection module and a signal processing subsystem, the photoelectric detection module is connected with the signal processing subsystem, and the signal processing subsystem is connected with the control module;
the photoelectric detection module comprises a light detector, a receiving circuit and a digital signal sending unit, wherein the light detector receives the laser signal sent by the fixing unit, converts the laser signal into an electric signal, transmits the electric signal to the receiving circuit for filtering and amplifying, and transmits the electric signal to the signal processing subsystem through the digital signal sending unit; the signal processing subsystem of the laser communication mobile unit receives the information transmitted from the control module through the digital signal wire, converts the signal into a corresponding image and transmits the image to the display screen; meanwhile, signals transmitted from the laser communication receiving module are received, demodulated and moved to a baseband, and then information is transmitted to the control module and even the demonstration network through the digital signal wire; the control module is used for coordinating information transmission between the display module and the demonstration network and between the laser communication receiving module and the demonstration network.
4. The laser communication experiment teaching system according to claim 3, further comprising a movable bypass end, wherein the bypass end comprises a bypass communication receiving module and a display module, the bypass communication receiving module comprises a photoelectric detection module and a signal processing subsystem, the photoelectric detection module is connected with the signal processing subsystem, and the signal processing subsystem is connected with the control module;
the photoelectric detection module comprises a light detector, a receiving circuit and a digital signal sending unit, wherein the light detector receives the laser signal sent by the fixing unit, converts the laser signal into an electric signal, transmits the electric signal to the receiving circuit for filtering and amplifying, and transmits the electric signal to the signal processing subsystem through the digital signal sending unit; the signal processing subsystem of the laser communication mobile unit receives the information transmitted from the control module through the digital signal wire, converts the signal into a corresponding image and transmits the image to the display screen; meanwhile, signals transmitted from the laser communication receiving module are received, demodulated and moved to a baseband, and then information is transmitted to the control module and even the demonstration network through the digital signal wire; the control module is used for coordinating information transmission between the display module and the demonstration network and between the laser communication receiving module and the demonstration network.
5. The laser communication experiment teaching system of claim 4, wherein the laser communication fixing unit further comprises an encryption module, the encryption module encrypts the source data by using a quantum key or by using a classical password, the encryption module receives and encrypts the data transmitted by the digital signal receiving unit, and the encrypted data is input into the optical modulation unit.
6. The laser communication experiment teaching system of claim 5, wherein the signal processing subsystem comprises a decryption module, and the decryption module decrypts the signal input by the digital signal transmitting unit by using a classical password shared with the laser communication fixing unit, and then converts the decrypted signal into a corresponding image to be transmitted to the display screen.
7. The laser communication experiment teaching system of claim 6, wherein the laser communication fixed unit and the laser communication mobile unit are respectively configured with a quantum key distribution terminal Alice and a quantum key distribution terminal Bob, and the quantum key distribution terminal Alice and the quantum key distribution terminal Bob distribute the same quantum key for both the transmitting end and the receiving end based on BB84 protocol; the quantum key distribution terminal Alice is connected with the encryption module, and the generated quantum key is used for the laser communication fixing unit to encrypt data; and the quantum key distribution terminal Bob is connected with the decryption module, and the generated quantum key is used for the laser communication mobile unit to decrypt data.
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| CN202110887482.7A CN113593394A (en) | 2021-08-03 | 2021-08-03 | Laser communication experiment teaching system |
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| CN202110887482.7A CN113593394A (en) | 2021-08-03 | 2021-08-03 | Laser communication experiment teaching system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201417519Y (en) * | 2009-03-27 | 2010-03-03 | 湖北众友科技实业股份有限公司 | Free space optical communication theory teaching experiment instrument |
| CN109150303A (en) * | 2018-10-30 | 2019-01-04 | 东南大学 | A kind of urban road laser communication method and system |
| CN109523884A (en) * | 2018-12-28 | 2019-03-26 | 江苏亨通问天量子信息研究院有限公司 | Teaching demonstration system is eavesdropped in fiber optic communication |
| CN209765785U (en) * | 2018-12-19 | 2019-12-10 | 赵克峰 | Laser communication teaching demonstration device |
| CN111478746A (en) * | 2020-04-07 | 2020-07-31 | 中国信息通信研究院 | Quantum key distribution and optical communication system hybrid networking method and device |
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2021
- 2021-08-03 CN CN202110887482.7A patent/CN113593394A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201417519Y (en) * | 2009-03-27 | 2010-03-03 | 湖北众友科技实业股份有限公司 | Free space optical communication theory teaching experiment instrument |
| CN109150303A (en) * | 2018-10-30 | 2019-01-04 | 东南大学 | A kind of urban road laser communication method and system |
| CN209765785U (en) * | 2018-12-19 | 2019-12-10 | 赵克峰 | Laser communication teaching demonstration device |
| CN109523884A (en) * | 2018-12-28 | 2019-03-26 | 江苏亨通问天量子信息研究院有限公司 | Teaching demonstration system is eavesdropped in fiber optic communication |
| CN111478746A (en) * | 2020-04-07 | 2020-07-31 | 中国信息通信研究院 | Quantum key distribution and optical communication system hybrid networking method and device |
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