CN114176280A - Underground personnel positioning and emergency communication device and method based on visible light - Google Patents
Underground personnel positioning and emergency communication device and method based on visible light Download PDFInfo
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- CN114176280A CN114176280A CN202111509250.4A CN202111509250A CN114176280A CN 114176280 A CN114176280 A CN 114176280A CN 202111509250 A CN202111509250 A CN 202111509250A CN 114176280 A CN114176280 A CN 114176280A
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- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/0406—Accessories for helmets
- A42B3/0433—Detecting, signalling or lighting devices
- A42B3/0453—Signalling devices, e.g. auxiliary brake or indicator lights
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- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/0406—Accessories for helmets
- A42B3/0433—Detecting, signalling or lighting devices
- A42B3/044—Lighting devices, e.g. helmets with lamps
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- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/30—Mounting radio sets or communication systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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Abstract
The invention discloses a device and a method for positioning underground personnel and emergency communication based on visible light, wherein the device comprises an intelligent mining safety helmet, a photodiode positioning module and a laser transmitter; the intelligent mining safety helmet is provided with an LED miner lamp and a power supply, and a transparent polarizing film is attached to the surface of the LED miner lamp; the photodiode positioning module comprises a photoelectric detector, a signal amplifier, an MCU controller, a color sensor and a polarizing film pasted with a transparent adhesive tape. The method collects the light of the LED miner lamp through a photoelectric detector and converts the light into a voltage value, so that light frequency information is obtained, and the identity of a miner is identified; white light emitted by the LED miner lamp is converted into colored light through the transparent polarizing film, the transparent adhesive tape and the polarizing film, the colored light is converted into RGB values through the color sensor, the position information of the LED miner lamp is obtained through the RGB values, and then the position of a miner is obtained, and the positioning of the miner is achieved. The invention has the advantages of accurate positioning and low cost.
Description
Technical Field
The invention relates to an emergency communication device and method, in particular to a visible light-based underground personnel positioning and emergency communication device and method, and belongs to the technical field of underground positioning and emergency.
Background
At present, sudden mine accidents all over the world frequently occur. In the process of dealing with sudden mine accidents, the specific location of the trapped personnel in the well cannot be confirmed to perform rescue due to the damage of hardware facilities and the absence of communication equipment. In addition, the rescuer must contact the trapped person as quickly as possible, acquire specific locations of the trapped person and casualties, and need to give food, water, and medical assistance to the trapped person downhole within 48 hours. Under the condition, the reliable emergency communication equipment carried by underground trapped people can effectively transmit the information of the trapped people, provide great support for smooth rescue of the underground people and bring great help to rescue work.
With the advancement of technology, although the downhole positioning and emergency communication technologies based on the existing communication devices have been widely studied, such as: the mine emergency communication method and system combining daily life and emergency with the Chinese patent No. CN201910751933.7 carry out emergency power supply and real-time communication for the whole communication system through an emergency power supply module, and realize the real-time communication with disaster sites and the support for rescue scheduling. The all-mine emergency communication system with the Chinese patent number of CN201721344681.9 comprises an aboveground through-the-earth communication device, a wireless communication base station, an anti-disaster antenna, a mobile communication terminal and the like, and realizes the two-way communication between the aboveground communication device and the underground mobile terminal device through two communication modes, namely a through-the-earth two-way communication mode and an underground wireless communication mode. The following disadvantages still remain: firstly, the workload of underground deployment of the special emergency communication module is large, the deployment in a large range and the coverage in the full range underground are difficult, and the equipment maintenance cost is large, which causes the waste of resources and the redundancy of equipment. Secondly, when a disaster occurs, it is difficult to ensure that the underground trapped people carry a special communication equipment module, so that the trapped people are not contacted with the communication equipment module with ease, and further rescue delay is caused. In addition, most underground emergency communication systems have single functions and do not have accurate personnel position positioning functions, and when a disaster occurs, even if an emergency communication line is normally established, trapped personnel can hardly describe the specific position of the disaster, so that the delay and delay of the rescue process are caused. More importantly, the communication device based on the radio frequency signal has large power consumption, and the communication is easily interrupted due to the exhaustion of the power during the repeated communication.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a visible light-based underground personnel positioning and emergency communication device and method, which can accurately position underground trapped personnel, and have the advantages of low power consumption, small size, portability and low cost.
In order to achieve the above purposes, the invention provides a visible light-based underground personnel positioning and emergency communication device, which comprises an intelligent mining safety helmet, a photodiode positioning module and a laser transmitter;
the intelligent mining safety helmet is provided with an LED miner lamp and a power supply, the power supply is connected with the LED miner lamp through a power switch, and a transparent polarizing film is pasted on the surface of the LED miner lamp;
the photodiode positioning module comprises a photoelectric detector, a signal amplifier, an MCU controller, a color sensor and a polarizing film pasted with a transparent adhesive tape; the photoelectric detector is connected with the input end of the MCU controller through the signal amplifier, the sensing probe of the color sensor is aligned to the polarization film, the output end of the color sensor is connected with the input end of the MCU controller, the output end of the MCU controller is connected with the input end of the laser emitter, and the output end of the laser emitter is connected with the ground control center through the optical fiber cable.
A visible light-based underground personnel positioning and emergency communication method comprises the following steps:
1) installing a photodiode positioning module underground, and storing the position information of the photodiode positioning module in a ground server;
2) when miners are trapped underground, the LED miner lamp on the intelligent miner lamp safety cap emits light with basic light frequency V1;
3) part of light of the LED miner lamp is absorbed into a photoelectric detector in a photoelectric diode positioning module, and the photoelectric detector converts a received light signal into a voltage value, and then the voltage value is amplified by a signal amplifier and transmitted to an MCU controller; the other part of light is absorbed into the polarizing film, the light shows different colors after passing through the polarizing film and is absorbed into the sensing probe of the color sensor, and the color sensor converts the different colors of light into RGB values and transmits the RGB values to the MCU controller;
4) the MCU controller continuously samples the voltage value output by the photoelectric detector in the sampling time to be used as an original signal, and transmits the sampling data to the MCU controller for storage;
5) the MCU controller inserts the received RGB value into the original signal packet header in the step 3) and transmits the RGB value to a laser transmitter as a processing signal containing position information;
6) the laser transmitter converts the received original signal containing the position information into a laser signal and transmits the laser signal to the ground server through an optical fiber cable;
7) the ground server processes the received laser signal to obtain optical frequency information and position information of the optical signal transmitting end, the identity of a miner is identified through the optical frequency information, the position information of the LED miner lamp, namely the position information of the miner, is obtained through the position information of the optical signal transmitting end, and the underground miner is positioned.
Compared with the prior art, the invention has the following advantages:
1) a diode positioning module is arranged underground, and a photoelectric detector in the diode positioning module collects the voltage value of light of the LED miner lamp as an original signal; in addition, the invention makes the light emitted by the LED mine lamp still white without affecting the illumination through the transparent polaroid on the LED mine lamp and the polarizing film stuck with the transparent adhesive tape in the diode positioning module, on the other hand, the white light emitted by the LED mine lamp is changed into colored light after passing through the transparent polaroid, the transparent adhesive tape and the polarizing film in sequence, the color sensor in the diode positioning module collects the colored light and converts the colored light into RGB value to be inserted into the head of the original signal packet as the original signal containing the position information and transmits the original signal to the laser transmitter, the laser transmitter transmits the processed signal to the ground server through the optical fiber cable, the ground server processes the received signal, the light frequency information of the LED mine lamp is obtained through the voltage value in the received original signal, and each light frequency corresponds to the identity of a miner, therefore, the identity of the miners can be obtained through the optical frequency information. The ground server obtains the position information of the LED miner lamp through the RGB value in the original signal, and further obtains the position information of the miner. A large number of emergency communication modules do not need to be deployed underground, and the underground original optical fiber cable is directly used for communicating with a ground server, so that a large amount of cost is saved, and the production cost of enterprises is reduced.
2) According to the invention, the underground accurate positioning can be realized through the diode positioning module without using GPRS navigation positioning; the invention has the advantages of low power consumption, long service life, small volume, portability and low cost.
3) The invention does not need to use a high-resolution camera, thereby avoiding the noise interference problem caused by high dust in the well.
Drawings
FIG. 1 is a schematic diagram of a smart safety helmet according to the present invention;
fig. 2 is an electrical schematic block diagram of the present invention.
In the figure: 1. the intelligent mining safety helmet comprises an intelligent mining safety helmet body 11, an LED miner lamp body 12, transparent polarizing plates 12, a transparent polarizing plate 21, a photoelectric detector 22, a laser emitter 23, a color sensor and a polarizing film 24.
Detailed Description
The invention will be further explained with reference to the drawings.
The invention relates to a visible light-based underground personnel positioning and emergency communication device, which comprises an intelligent mining safety helmet 1, a photodiode positioning module and a laser transmitter 22;
as shown in fig. 1, a power supply and an LED mine lamp 11 are mounted on the intelligent mining safety helmet 1, the power supply is connected to the LED mine lamp 11 through a power switch, and a transparent polarizing film is attached to the surface of the LED mine lamp 11;
the LED miner lamp 11 is used for emitting light with light frequency to position the position of a miner and provide an illumination function;
as shown in fig. 2, the photodiode positioning module includes a photodetector 21, a signal amplifier, an MCU controller, a color sensor 23, and a polarizing film 24 to which a transparent adhesive tape is attached; the photoelectric detector 21 is connected with the input end of the MCU controller through a signal amplifier, the induction probe of the color sensor 23 is aligned with the polarizing film 24, and the output end of the color sensor is connected with the input end of the MCU controller; the output end of the MCU controller is connected with the input end of the laser transmitter 22, and the output end of the laser transmitter 22 is connected with the ground control center through an optical fiber cable.
The MCU controller is connected with the underground electric wire and is paired with the MCU controller through the underground electric wire.
The photodiode positioning module is used for collecting light rays emitted by the LED mine lamp 11 and determining the position of a light ray emitting end, namely the position of the LED mine lamp 11 emitting the light rays according to the collected light rays so as to determine the position of a miner; the photoelectric detector 21 is a photodiode and is used for collecting light emitted by the LED mine lamp 11 and converting a light signal emitted by the LED mine lamp 11 into an electrical signal; the laser emitter 22 is used for converting an electric signal into a laser signal, the polarizing film 24 is used for displaying light rays emitted by the LED miner's lamp 11 in different colors, and the color sensor 23 is used for converting color information of the light rays into RGB values.
The photodiode positioning module can further comprise a rechargeable battery pack, the rechargeable battery pack is connected with the MCU controller, under a normal condition, the MCU controller is powered through underground wires, under an emergency condition, the wires are damaged and cannot be normally powered on, the MCU controller starts the rechargeable battery pack to supply power to the MCU controller, and therefore the photodiode positioning module is guaranteed to be always in a power-on state.
As an improvement of the invention, the intelligent mining safety helmet 1 is also provided with an MCU control module and an information input module, the LED mine lamp 11 and the information input module are both connected with the MCU control module, and the LED mine lamp 11 is a frequency-adjustable LED mine lamp 11. The information input module is used for inputting information; the MCU control module is used for processing the information input by the information input module and transmitting the processed signal to the communication drive circuit, the communication drive circuit controls the light frequency of the LED mine lamp 11 according to the received signal, and the ground server identifies the information transmitted by the underground miner through the light frequency.
As a preferred mode of the present invention, the information input module is a numeric keypad or an alphabetical keypad, if the information input module is a numeric keypad, each numeric keypad has different frequencies, when a mineworker is trapped in a well, key information is input through numeric keys on the numeric keypad and transmitted to the MCU control module, the MCU control module matches the received information with an internally stored optical frequency data set thereof to match out an optical frequency V2 corresponding to the numeric key, then the optical frequency of the LED miner lamp 11 is controlled to be V1+ V2 by the driving communication circuit, the LED miner lamp 11 sets the optical frequency of the LED miner lamp 11 to be V1 by the driving communication circuit after flickering according to the optical frequency of V1+ V2 for a set time, the set time can be set according to actual requirements, such as 30s, 60s, and the like, the ground server processes the received signal to obtain information, and identifies the information input by the optical frequency information through the numeric keypad, such as: the information expressed by the frequency corresponding to the number 1 is "the trapped person is 2-5 persons", and the information expressed by the frequency corresponding to the number 2 is: the people are slightly injured, and the like, so that the condition of the underground trapped people can be known, and the underground rescue emergency measures can be made in time.
When the device is used specifically, the plurality of photodiode positioning modules are arranged and are all arranged on the top wall or the side wall of an underground roadway, the installation positions of the photodiode positioning modules need to ensure that the photoelectric detector 21 can collect light rays emitted by the LED mine lamp 11 on the intelligent safety helmet, and the light rays emitted by the LED mine lamp 11 can be absorbed into the probe of the color sensor 23 through the polarizing film 24. The staff can install a photodiode positioning module at intervals according to actual needs, and the position of the photodiode positioning module is known and stored in a ground server. The number of the photodiode positioning modules is determined according to actual needs.
The method for positioning underground personnel and carrying out emergency communication based on the device comprises the following steps:
1) installing a photodiode positioning module at intervals underground, and storing the position information of the photodiode positioning module in a ground server;
the photodiode positioning module can be installed on the top wall or the side wall of the underground roadway, and the installation position of the photodiode positioning module needs to ensure that the photodetector 21 can collect light emitted by the LED mine lamp 11 on the intelligent safety helmet, and the light emitted by the LED mine lamp 11 can be absorbed into the probe of the color sensor 23 through the polarizing film 24. The staff can install a photodiode positioning module at intervals according to actual needs, for example, install a photodiode positioning module at intervals of 3 meters.
2) When a miner is trapped underground, the LED miner lamp 11 on the intelligent miner lamp safety cap emits light with basic light frequency V1;
presetting fundamental frequency V1 of each LED mine lamp 11, wherein the fundamental light frequency V1 of each LED mine lamp 11 is different;
3) part of light emitted by the LED mine lamp 11 is absorbed into a photoelectric detector 21 in a photoelectric diode positioning module, and the photoelectric detector 21 converts a received optical signal into a voltage value, and then the voltage value is amplified by a signal amplifier and transmitted to an MCU controller; the other part of the light is absorbed into the polarizing film 24, the light shows different colors after passing through the polarizing film 24 and is absorbed into the sensing probe of the color sensor 23, and the color sensor 23 converts the light (light signal) with different colors into RGB values to be transmitted to the MCU controller;
4) the MCU controller continuously samples the voltage value output by the photoelectric detector 21 in sampling time to be used as an original signal, and the sampling data is stored in the MCU controller;
5) the MCU controller inserts the received RGB value into the original signal packet header in the step 3) as an original signal containing position information, and transmits the original signal to the laser transmitter 22;
6) the laser transmitter 22 converts the received original signal containing the position information into a laser signal, and transmits the laser signal to a ground server through a downhole optical fiber cable;
7) the ground server processes the received laser signal to obtain optical frequency information and position information of the optical signal transmitting end, the identity of a miner is identified through the optical frequency information, and the position information of the LED miner lamp 11, namely the position information of the miner, is obtained through the position information of the optical signal transmitting end, so that the underground miner is positioned.
The optical frequency information is obtained by the following method:
7.1) the ground server filters the voltage value in the received laser signal through a band-pass filter to obtain a laser signal containing the voltage value in a preset optical frequency range, wherein the preset optical frequency range is 1000Hz to 7000Hz, and the optical frequency of the LED mine lamp 11 is set in the preset optical frequency range;
because other light sources may exist in the underground besides the light source emitted by the LED mine lamp 11, the ground server filters the voltage value in the laser signal through the band-pass filter, filters out other light sources, retains the laser signal containing the voltage value in the preset optical frequency range, and improves the positioning accuracy;
7.2) the ground server performs Fourier change processing on the voltage value in the laser signal obtained in the step 7.1) to obtain spectrum information, wherein the spectrum information comprises optical frequency information and a corresponding power value thereof;
7.3) the ground server carries out matching identification on the optical frequency information obtained in the step 7.2) and a preset optical frequency data set stored in the ground server to obtain miner information corresponding to the optical frequency information, so that identity of a miner is identified.
The preset optical frequency data set comprises miner identity information and corresponding basic optical frequency V1, each miner identity information corresponds to one basic optical frequency V1, and the basic optical frequency V1 of each LED miner lamp 11 is different, so that the identity of the miner can be obtained by matching the received optical frequency with the optical frequency in the preset optical frequency data set, and the identity of the miner can be identified.
Further, in order to understand the requirements of trapped miners, the preset optical frequency data set further includes the requirement information of the miners and the corresponding optical frequencies, and the requirement information of the miners can be set according to the requirements, for example: the information corresponding to the optical frequency of the number 1 is: the 'trapped person is 2-5 persons', and the information corresponding to the optical frequency of the number 2 is as follows: "there is a slight injury to the person", and the information corresponding to the optical frequency of the number 3 is: the information corresponding to the light frequency of the number 4, which indicates that the person is severely injured, is: the information corresponding to the light frequency of the number 5 "lack of food and drinking water" is: "power-needed equipment", etc. If the information input module is a numeric keyboard: when miners are trapped underground, key information is input through the number keys on the number keyboard and is transmitted to the MCU control module, the MCU control module matches the received key information with the optical frequency data set stored in the MCU control module to match out the optical frequency V2 corresponding to the key information, then the optical frequency of the LED mine lamp 11 is controlled to be V1+ V2 through the driving communication circuit, the optical frequency of the LED mine lamp 11 is controlled to be V1 through the driving communication circuit after the set time, and the set time can be set according to actual requirements, such as 30s, 60s and the like. The ground server processes the received signals to obtain optical frequency information, and the optical frequency information is matched with the optical frequency information in the preset optical frequency data set stored inside to obtain the requirement corresponding to the optical frequency, so that the requirement of trapped people is known, and the emergency rescue work can be better performed.
The optical frequency data set comprises key information and corresponding optical frequencies. If the information input module is a numeric keyboard, the key information is numbers, and each number corresponds to an optical frequency; of course, the information input module may also be a keyboard with letters, each key information is a letter, and each letter corresponds to one light frequency.
The optical signal transmitting end position information is obtained by the following method:
the ground server compares the RGB value in the laser signal with the positioning fingerprint information stored in the ground server, screens out a point corresponding to the RGB value with the minimum difference with the RGB value in the positioning fingerprint information, and uses the point as a calibration point, and calculates the position of the light signal transmitting end, namely the position of the LED mine lamp 11 by using the position information of the calibration point, thereby obtaining the position of a miner;
the positioning fingerprint information is obtained by the following method:
and turning off other underground light sources, reserving an LED white light source as an original point, and sequentially sticking a transparent polaroid, a transparent adhesive tape and the transparent polaroid on the LED light source. In the range of LED light source irradiation, 3X 3 ranges are selected, sampling is carried out by using a color sensor 23 at intervals of 10cm in the vertical (Y), horizontal (X) and depth (Z) directions, and RGB information and corresponding position information of each point are recorded as positioning fingerprint information. Because the three-layer structure is that the light takes place the color development polarization effect, consequently, different position colour value can not be repeated. If positioning is more accurate, the acquisition can be carried out at intervals of 1 cm. Since the RGB information of one point and the corresponding location information thereof are collected every 10cm, which has satisfied the requirement of accurate positioning, the present embodiment selects to collect the RGB information of one point and the corresponding location information thereof every 10 cm.
The positioning method is only suitable for accurately positioning one LED mine lamp 11, when a plurality of miners gather together, one LED mine lamp 11 is controlled to emit light, and the power supplies of other LED mine lamps 11 are switched on and off through the power supply on the intelligent mining safety helmet 1, so that other LED mine lamps 11 are switched off.
Claims (10)
1. A visible light-based underground personnel positioning and emergency communication device is characterized by comprising an intelligent mining safety helmet, a photodiode positioning module and a laser transmitter;
the intelligent mining safety helmet is provided with an LED miner lamp and a power supply, the power supply is connected with the LED miner lamp through a power switch, and a transparent polarizing film is pasted on the surface of the LED miner lamp;
the photodiode positioning module comprises a photoelectric detector, a signal amplifier, an MCU controller, a color sensor and a polarizing film pasted with a transparent adhesive tape; the photoelectric detector is connected with the input end of the MCU controller through the signal amplifier, the sensing probe of the color sensor is aligned to the polarization film, the output end of the color sensor is connected with the input end of the MCU controller, the output end of the MCU controller is connected with the input end of the laser emitter, and the output end of the laser emitter is connected with the ground control center through the optical fiber cable.
2. The visible light-based underground personnel positioning and emergency communication device of claim 1, wherein an MCU control module and an information input module are further installed on the intelligent mining safety helmet, the LED mine lamp and the information input module are both connected with the MCU control module, and the LED mine lamp is a frequency-adjustable LED mine lamp.
3. The visible-light-based downhole personnel location and emergency communication device of claim 1, wherein said information input module is a numeric or alphanumeric keyboard.
4. A visible light-based underground personnel positioning and emergency communication method is characterized by comprising the following steps:
1) installing a photodiode positioning module underground, and storing the position information of the photodiode positioning module in a ground server;
2) when miners are trapped underground, the LED miner lamp on the intelligent miner lamp safety cap emits light with basic light frequency V1;
3) part of light of the LED miner lamp is absorbed into a photoelectric detector in a photoelectric diode positioning module, and the photoelectric detector converts a received light signal into a voltage value, and then the voltage value is amplified by a signal amplifier and transmitted to an MCU controller; the other part of light is absorbed into the polarizing film, the light shows different colors after passing through the polarizing film and is absorbed into the sensing probe of the color sensor, and the color sensor converts the different colors of light into RGB values and transmits the RGB values to the MCU controller;
4) the MCU controller continuously samples the voltage value output by the photoelectric detector in the sampling time to be used as an original signal, and transmits the sampling data to the MCU controller for storage;
5) the MCU controller inserts the received RGB value into the original signal packet header in the step 3) and transmits the RGB value to a laser transmitter as a processing signal containing position information;
6) the laser transmitter converts the received original signal containing the position information into a laser signal and transmits the laser signal to the ground server through an optical fiber cable;
7) the ground server processes the received laser signal to obtain optical frequency information and position information of the optical signal transmitting end, the identity of a miner is identified through the optical frequency information, the position information of the LED miner lamp, namely the position information of the miner, is obtained through the position information of the optical signal transmitting end, and the underground miner is positioned.
5. A visible light-based method for downhole personnel location and emergency communication according to claim 4, wherein said optical frequency information is obtained by:
7.1) the ground server filters the voltage value in the laser signal through a band-pass filter to obtain the laser signal containing the voltage value in a preset optical frequency range, wherein the preset optical frequency range is 1000Hz to 7000 Hz;
7.2) the ground server performs Fourier transform processing on the voltage value obtained in the step 7.1) to obtain spectrum information, wherein the spectrum information comprises optical frequency information and a corresponding power value thereof;
7.3) the ground server carries out matching identification on the optical frequency information obtained in the step 7.2) and a preset optical frequency data set stored in the ground server to obtain miner information corresponding to the optical frequency information, so that identity of a miner is identified.
6. The visible-light-based downhole personnel location and emergency communication method of claim 5, wherein the preset optical frequency data set comprises miner identity information and corresponding base optical frequency V1, and each miner identity information corresponds to one base optical frequency V1.
7. The method as claimed in claim 6, wherein the preset optical frequency data set further includes requirement information of miners and optical frequencies corresponding to the requirement information, when miners are trapped in the well, key information is input through keys on the information input module and transmitted to the MCU control module, the MCU control module matches the received information with the optical frequency data set stored inside the MCU control module to match out the optical frequency V2 corresponding to the key information, then the optical frequency of the LED mine lamp is controlled to be V1+ V2 through the driving communication circuit, and the optical frequency of the LED mine lamp is controlled to be V1 through the driving communication circuit after the set time.
8. The method of claim 7, wherein the optical frequency data set comprises key press information and its corresponding optical frequency.
9. A visible light-based method for downhole personnel location and emergency communication according to claim 4, wherein the optical signal transmitting end location information is obtained by:
the ground server compares the RGB value in the laser signal with the positioning fingerprint information stored in the ground server, screens out a point corresponding to the RGB value with the minimum difference with the RGB value in the positioning fingerprint information, and uses the point position information to calculate the position of the light signal transmitting end, namely the position of the LED mine lamp, thereby obtaining the position of the miner.
10. The visible light-based downhole personnel location and emergency communication method of claim 9, wherein the location fingerprint information is obtained by:
and closing other light sources, reserving an LED white light source as an original point, sequentially sticking a transparent polaroid, a transparent adhesive tape and the transparent polaroid on the LED light source, sampling by using a color sensor at intervals in three directions of vertical (Y), horizontal (X) and longitudinal depth (Z) within the irradiation range of the LED light source, and recording RGB information of each point and corresponding position information as positioning fingerprint information.
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