CN109143212A - Tunnel personnel location system and method based on the reverse modulation technique of visible light - Google Patents
Tunnel personnel location system and method based on the reverse modulation technique of visible light Download PDFInfo
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- CN109143212A CN109143212A CN201810574736.8A CN201810574736A CN109143212A CN 109143212 A CN109143212 A CN 109143212A CN 201810574736 A CN201810574736 A CN 201810574736A CN 109143212 A CN109143212 A CN 109143212A
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- 238000006243 chemical reaction Methods 0.000 claims description 23
- 230000005693 optoelectronics Effects 0.000 claims description 20
- 238000004891 communication Methods 0.000 claims description 17
- 239000000284 extract Substances 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves
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Abstract
Tunnel personnel location system disclosed by the invention based on the reverse modulation technique of visible light, including active light source module, active light source module is evenly distributed on tunnel top, active light source module sends downlink optical signal to reverse light source module, reverse light source module is arranged on the safety cap of construction personnel, reverse light source module sends uplink optical signal to the active light source module, and active light source module is also connected with Data processing core module.The invention also discloses the localization methods for using positioning system localized tunnel personnel, solve the problems, such as the prior art can not the position to tunnel personnel positioned in real time, localization method of the invention is simple directly and very efficient, this is of great importance to first aid after staff attendance, tracking and positioning, calamity in the engineer operation of underground.
Description
Technical field
The invention belongs to optical communication techniques to be used for tunnel safety technical field, be related to based on the reverse modulation technique of visible light
Tunnel personnel location system and method.
Background technique
With the fast development of China in Recent Years economy, the overall national strength and science and technology in China constantly enhance, and tunnel is made
The underground engineerings such as industry also start to rapidly develop.Present China has been the country that underground engineering is largest, quantity is most in the world.
In recent years, because the demand of each big city facilities over the ground, the quantity of China's underground engineering are also consequently increased rapidly.Therefore, tunnel
The safety problem of road operation also more can not be ignored.The construction environment of tunneling operation is very arduous, and work danger coefficient is higher, and
Personnel amount is more, therefore realizes that the real-time positioning to construction personnel can be to anxious after staff attendance, tracking and positioning, calamity in engineer operation
It rescues and is of great importance.Tunnel personnel positioning apparatus common at present mainly uses Zigbee signal flying time technology, the second generation
Less radio-frequency (RFID) identification technology, such methods accuracy also need to improve.
Summary of the invention
The object of the present invention is to provide a kind of tunnel personnel location systems based on the reverse modulation technique of visible light, solve
The problem of prior art can not position in real time the position of tunnel personnel.
It is a further object of the present invention to provide the localization methods of tunnel personnel a kind of.
The technical scheme adopted by the invention is that the tunnel personnel location system based on the reverse modulation technique of visible light, packet
Active light source module is included, active light source module is evenly distributed on tunnel top, and active light source module sends downlink optical signal to inverse
To light source module, reverse light source module is arranged on the safety cap of construction personnel, reverse light source module send uplink optical signal to
Active light source module, active light source module are also connected with Data processing core module.
Other features of the invention also reside in,
Active light source module includes communication interface, and the input terminal of communication interface connects the Data processing core module, leads to
Believe that the output end of interface connects MCU module, MCU module sends the digital signal that downlink signal processing forms fixed frequency to number
Analog conversion circuit DAC, D/A converting circuit DAC output end connect LED drive circuit, and LED drive circuit connection LED light simultaneously drives
LED light work, LED light are internally provided with specific frequency optical transmitting set, output end of the MCU module also with analog to digital conversion circuit ADC
Connection, the input terminal of analog to digital conversion circuit ADC are connect with the output end of opto-electronic receiver and signal processing module, opto-electronic receiver and letter
The input terminal of number processing module is used to receive the uplink optical signal that reverse light source module is sent.
Reverse light source module includes including photodetector, and photodetector inside includes opto-electronic receiver circuit, and photoelectricity connects
It receives circuit and receives the downlink optical signal that LED light generates, opto-electronic receiver circuit connection analog to digital conversion circuit ADC/ D/A converting circuit
DAC, analog to digital conversion circuit ADC/ D/A converting circuit DAC connection main control module MCU, D/A converting circuit DAC connection are inversely driven
Dynamic circuit, reverse driving circuit control reverse modulator, and downlink optical signal is debugged and is reflected to actively by reverse modulator
Light source module.
Active light source module has both illumination and communication function.
The setting of Data processing core module is wireless including connecting with active light source module by signal in tunnel outer monitoring room
Operating platform.
Another technical solution of the invention is the tunnel personnel positioning method based on the reverse modulation technique of visible light, is used
The above-mentioned tunnel personnel location system based on the reverse modulation technique of visible light, specific operation process include the following steps:
The safety cap that step 1. wears construction personnel carries out personally identifiable information record, it is ensured that each safety cap has uniqueness
Number with every to enter the construction personnel in tunnel corresponding, and by safety cap labeled as U1, U2... .., Un；
Step 2. successively uniformly installs active light source module at the top in tunnel since tunnel face, and is labeled as L1,
L2... .., Ln；
To MCU module, MCU module adds the downlink optical signal that specific frequency optical transmitting set inside step 3.LED lamp is sent
Signal is formed with fixed frequency f by upper oscillating circuit0Digital signal pass to D/A converting circuit DAC, D/A converting circuit
DAC will be sent to LED drive circuit after signal processing, LED drive circuit controls LED operation, and sends downlink optical signal to peace
Reverse light source module on construction personnel's safety cap；
It is f that the reverse module of step 4., which receives fixed frequency,0Signal when, activate reverse modulation circuit, will receive first
To optical signal switch to electric signal by opto-electronic receiver circuit, digital letter is then converted to by analog to digital conversion circuit ADC module
Number and be sent to main control module MCU, then main control module MCU, which demodulate to uplink source data, is sending D/A converting circuit to
After DAC is converted, it is sent to reverse modulation circuit, reverse modulation circuit controls reverse modulator and uplink optical signal is carried out two
Active light source module is sent to after secondary debugging；
Signal after the secondary debugging received is converted to telecommunications by the opto-electronic receiver module of step 5. active light source module
Number, signal processing module handles the signal after secondary modulation, extracts uplink signal；Then pass through analog-to-digital conversion
Electric signal is converted to digital signal by circuit ADC, is then forwarded to and is demodulated uplink data by MCU, and is connect by communication
Mouth is sent to Data processing core module, and Data processing core module receives correspondence markings U and active light source module on safety cap
Label L, to realize the real-time positioning to construction personnel.
It also needs to judge when Data processing core module positions the timing of construction personnel in step 5: working as data processing centre
Module first receives active light source module L1After receive L2Information when, then assert that construction personnel enters tunnel, then initialize wearing peace
The location information of the construction personnel of full cap, when data processing centre first receives active light source module L2After receive L1Information when, then
Assert that worker leaves tunnel.
The invention has the advantages that tunnel personnel location system and method based on the reverse modulation technique of visible light, solution
The problem of prior art of having determined can not position in real time the position of tunnel personnel.It can be clear by the full-duplex communication of the system
The checking-in state of every construction personnel and location information are fed back to data processing centre by Chu.Localization method letter provided by the invention
Single directly and very efficient, this is of great importance to first aid after staff attendance, tracking and positioning, calamity in the engineer operation of underground；Make LED
Additional auxiliary system is not needed while completing illuminating effect very well with regard to the achievable real-time positioning to construction personnel, it can be with
More resources are saved, operating cost is effectively reduced.
Detailed description of the invention
Fig. 1 is the tunnel personnel location system structural schematic diagram of the invention based on the reverse modulation technique of visible light；
Fig. 2 is that the structure of drive end in the tunnel personnel location system of the invention based on the reverse modulation technique of visible light is shown
It is intended to；
Fig. 3 is the structure that end is inversely held in the tunnel personnel location system of the invention based on the reverse modulation technique of visible light
Schematic diagram；
Fig. 4 is tunnel full-duplex communication in the tunnel personnel location system of the invention based on the reverse modulation technique of visible light
Link schematic diagram；
Fig. 5 is that construction personnel enters and leaves tunnel schematic diagram.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
Tunnel personnel location system based on the reverse modulation technique of visible light of the invention, as shown in Figure 1, including active light
Source module, active light source module are evenly distributed on tunnel top, and active light source module sends downlink optical signal to reverse light source die
Block, reverse light source module are arranged on the safety cap of construction personnel, and reverse light source module sends uplink optical signal to the active
Light source module, active light source module are also connected with Data processing core module.
As shown in Fig. 2, active light source module includes communication interface, the input terminal of communication interface connects the Data processing
Core module, the output end of communication interface connect MCU module, and MCU module believes the number that downlink signal processing forms fixed frequency
Number send D/A converting circuit DAC to, D/A converting circuit DAC output end connects LED drive circuit, LED drive circuit connection
LED light simultaneously drives LED light to work, and LED light is internally provided with specific frequency optical transmitting set, MCU module also with analog to digital conversion circuit
The output end of ADC connects, and the input terminal of analog to digital conversion circuit ADC is connect with the output end of opto-electronic receiver and signal processing module,
The input terminal of opto-electronic receiver and signal processing module is used to receive the uplink optical signal that reverse light source module is sent, and the photoelectricity connects
It receives and signal processing module is photodetector.
As shown in Figure 3 and Figure 4, reverse light source module includes photodetector, includes opto-electronic receiver inside photodetector
Circuit, opto-electronic receiver circuit receive the downlink optical signal that LED light generates, opto-electronic receiver circuit connection analog to digital conversion circuit ADC, mould
Number conversion circuit ADC connection main control module MCU, MCU then connect D/A converting circuit DAC, and DAC reconnects reverse driving electricity
Road, reverse driving circuit control reverse modulator, and downlink optical signal is debugged and is reflected to active light source by reverse modulator
Module.
Active light source module has both illumination and communication function.
Data processing core module is arranged in tunnel outer monitoring room, including what is connect with the active light source module by signal
Radio operation platform, major function are the record and statistics to construction personnel's real time positioning data.
Tunnel personnel positioning method based on the reverse modulation technique of visible light of the invention, using such as above-mentioned based on can
The tunnel personnel location system of light-exposed reverse modulation technique, specific operation process include the following steps:
The safety cap that step 1. wears construction personnel carries out personally identifiable information record, it is ensured that each safety cap has only
Number is corresponding into the construction personnel in tunnel with every, and safety cap is labeled as U1, U2... .., Un；
Step 2. successively uniformly installs active light source module at the top in tunnel since tunnel face, and is labeled as L1,
L2... .., Ln；
Specific frequency optical transmitting set inside step 3.LED lamp sends downlink optical signal to MCU module, and MCU module adds
Signal is formed with fixed frequency f by oscillating circuit0Digital signal pass to D/A converting circuit DAC, D/A converting circuit DAC
LED drive circuit will be sent to after signal processing, LED drive circuit controls LED operation, and sends downlink optical signal to being mounted on
Reverse light source module on construction personnel's safety cap；
It is f that the reverse module of step 4., which receives fixed frequency,0Signal when, activate reverse modulation circuit, will receive first
To optical signal switch to electric signal by opto-electronic receiver circuit, digital letter is then converted to by analog to digital conversion circuit ADC module
Number and be sent to main control module MCU, then main control module MCU, which demodulate to uplink source data, is sending D/A converting circuit to
After DAC is converted, it is sent to reverse modulation circuit, reverse modulation circuit controls reverse modulator and uplink optical signal is carried out two
Active light source module is sent to after secondary debugging；
Signal after the secondary debugging received is converted to telecommunications by the opto-electronic receiver module of step 5. active light source module
Number, signal processing module handles the signal after secondary modulation, extracts uplink signal；Then pass through analog-to-digital conversion
Electric signal is converted to digital signal by circuit ADC, is then forwarded to and is demodulated uplink data by MCU, and is connect by communication
Mouth is sent to Data processing core module, and Data processing core module receives correspondence markings U and active light source module on safety cap
Label L, to realize the real-time positioning to construction personnel.
It also needs to judge when Data processing core module positions the timing of construction personnel in step 5: as shown in figure 5, when number
Active light source module L is first received according to processing center module1After receive L2Information when, then assert that construction personnel enters tunnel, then just
The location information of the construction personnel of beginningization safe wearing cap, when data processing centre first receives active light source module L2After receive L1
Information when, then assert that worker leaves tunnel.
The working principle of tunnel personnel location system based on the reverse modulation technique of visible light of the invention is as follows: LED light
The downlink optical signal that internal specific frequency optical transmitting set is sent adds oscillating circuit by MCU module, is formed with fixed frequency
f0Digital signal pass to D/A converting circuit ADC, which can be by the signal modulation received at analog signal, then by the mould
Quasi- signal is sent to LED drive circuit, so that it may realize and generate downlink using LED drive circuit while illuminating to tunnel
To improve anti-interference fixed frequency f is arranged in the signal by optical signal0, this frequency human eye nonrecognition will not influence normal photograph
Bright function.Reverse end equipment is installed on the safety cap of construction personnel, is f when receiving frequency0Signal when, activate reverse adjust
Circuit processed.The transmission process of reverse modulation module is that signal is switched to electric signal via opto-electronic receiver circuit first, is then passed through
Signal sampling is quantized into digital signal by analog-to-digital conversion, then is demodulated by main control module MCU, then MCU pairs of main control module
Upstream data carries out PPM modulation and switchs to modulated-analog signal by D/A converting circuit DAC and be input in reverse modulation circuit,
Then reverse modulator is secondary to downlink optical signal debugs and is reflected back drive end.
MCU micro-control unit, also known as single-chip microcontroller are exactly small-sized computer, have arithmetic unit, controller, memory, defeated
Enter output equipment；D/A converter module: being the module for converting digital signals into analog signal, generally first to digital signal solution
Code forms ladder-like signal, then can revert to sampled signal, sampled signal through making spectral characteristic compensation with the inverse of Sa function
Frequency spectrum just obtain the frequency spectrum of original analog signal by low-pass filtering；Analog-to-digital conversion module: being to convert analog signals into number
The module of word signal is a filtering, sampling is kept and the process of coding；Analog signal is through bandlimiting filtering, sampling hold circuit,
Become stairstepping signal, then each level in ladder-like signal is become binary code by encoded device.Photodetector:
Working principle is based on photoelectric effect, is that illuminated material electric conductivity is caused to change by radiation.
Claims (7)
1. the tunnel personnel location system based on the reverse modulation technique of visible light, which is characterized in that including active light source module, institute
It states active light source module and is evenly distributed on tunnel top, the active light source module sends downlink optical signal to reverse light source die
Block, the reverse light source module are arranged on the safety cap of construction personnel, the reverse light source module send uplink optical signal to
The active light source module, the active light source module are also connected with Data processing core module.
2. the tunnel personnel location system as described in claim 1 based on the reverse modulation technique of visible light, which is characterized in that institute
Stating active light source module includes communication interface, and the input terminal of the communication interface connects the Data processing core module, described
The output end of communication interface connects MCU module, and the MCU module passes the digital signal that downlink signal processing forms fixed frequency
D/A converting circuit DAC is given, the D/A converting circuit DAC output end connects LED drive circuit, the LED drive circuit
Connection LED light simultaneously drives LED light to work, and LED light is internally provided with specific frequency optical transmitting set, the MCU module also with modulus
The output end of conversion circuit ADC connects, the input terminal and opto-electronic receiver of analog-digital conversion circuit as described ADC and signal processing module
The input terminal of output end connection, the opto-electronic receiver and signal processing module is used to receive what the reverse light source module was sent
Traveling optical signal.
3. the tunnel personnel location system as claimed in claim 2 based on the reverse modulation technique of visible light, which is characterized in that institute
Stating reverse light source module to include includes photodetector, includes opto-electronic receiver circuit, the photoelectricity inside the photodetector
It receives circuit and receives the downlink optical signal that the LED light generates, the opto-electronic receiver circuit connection analog to digital conversion circuit ADC/ number
Analog conversion circuit DAC, analog-digital conversion circuit as described ADC/ D/A converting circuit DAC connection main control module MCU, the digital-to-analogue conversion
The reverse driving circuit of circuit DAC connection, the reverse driving circuit control reverse modulator, and the reverse modulator is by downlink light
Signal is debugged and is reflected to active light source module.
4. the tunnel personnel location system as claimed in claim 3 based on the reverse modulation technique of visible light, which is characterized in that institute
It states active light source module and has both illumination and communication function.
5. the tunnel personnel location system as described in claim 1 based on the reverse modulation technique of visible light, which is characterized in that institute
Data processing core module is stated to be arranged in tunnel outer monitoring room, including the wireless behaviour connecting with the active light source module by signal
Make platform.
6. the tunnel personnel positioning method based on the reverse modulation technique of visible light, which is characterized in that use such as claim 3 institute
The tunnel personnel location system based on the reverse modulation technique of visible light stated, specific operation process include the following steps:
The safety cap that step 1. wears construction personnel carries out personally identifiable information record, it is ensured that each safety cap has unique volume
It is corresponding number to enter the construction personnel in tunnel with every, and by safety cap labeled as U1, U2... .., Un；
Step 2. successively uniformly installs active light source module at the top in tunnel since tunnel face, and is labeled as L1,
L2... .., Ln；
The downlink optical signal that specific frequency optical transmitting set inside step 3.LED lamp is sent is to MCU module, and MCU module is plus vibration
It swings circuit and signal is formed with fixed frequency f0Digital signal pass to D/A converting circuit DAC, D/A converting circuit DAC will
It is sent to LED drive circuit after signal processing, LED drive circuit controls LED operation, and sends downlink optical signal and apply to being mounted on
Reverse light source module on worker person's safety cap；
It is f that reverse module described in step 4., which receives fixed frequency,0Signal when, activate reverse modulation circuit, will receive first
Optical signal switch to electric signal by opto-electronic receiver circuit, digital signal is then converted to by analog to digital conversion circuit ADC module
And it is sent to main control module MCU, then main control module MCU, which demodulate to uplink source data, is sending D/A converting circuit to
After DAC is converted, it is sent to reverse modulation circuit, reverse modulation circuit controls reverse modulator and uplink optical signal is carried out two
Active light source module is sent to after secondary debugging；
Signal after the secondary debugging received is converted to electric signal by the opto-electronic receiver module of step 5. active light source module, letter
Number processing module handles the signal after secondary modulation, extracts uplink signal；Then pass through analog to digital conversion circuit
Electric signal is converted to digital signal by ADC, is then forwarded to and is demodulated uplink data by MCU, and is sent out by communication interface
Data processing core module is given, Data processing core module receives correspondence markings U and active light source module marks on safety cap
L, to realize the real-time positioning to construction personnel.
7. as claimed in claim 6 based on the tunnel personnel positioning method of the reverse modulation technique of visible light, which is characterized in that institute
State also needs to judge when Data processing core module positions the timing of construction personnel in step 5: when Data processing core module is first
Receive active light source module L1After receive L2Information when, then assert that construction personnel enters tunnel, then initialize safe wearing cap
The location information of construction personnel, when data processing centre first receives active light source module L2After receive L1Information when, then assert work
People leaves tunnel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810574736.8A CN109143212A (en) | 2018-06-06 | 2018-06-06 | Tunnel personnel location system and method based on the reverse modulation technique of visible light |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810574736.8A CN109143212A (en) | 2018-06-06 | 2018-06-06 | Tunnel personnel location system and method based on the reverse modulation technique of visible light |
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Application publication date: 20190104 |