CN104363049A - Identity recognition system and identity recognition method both based on white-light communication - Google Patents

Abstract

The invention discloses an identity recognition system based on white-light communication, and particularly relates to an identity recognition system and an identity recognition method both based on an LED miner's lamp in a mine. The identity recognition system comprises a lithium battery, an emission encoder, a driver, an LED lamp holder, a blue light filter, a photoelectric detector, an amplification filter, a decoder and a communication interface. Hardware equipment of the system includes an LED miner's lamp tag and a white-light card reader. The carry-on LED miner's lamp is utilized, a controller controls the LED lamp holder to transmit identity information according to certain codes by means of a Manchester pulse coding mode, and thus, automatic identity recognition of a miner can be realized. The system has the advantages that additional active or passive identity recognition cards are not needed, identity recognition is realized by existing LED miner's lamps, and the system is easy to upgrade and free from electromagnetic radiation, does not occupy existing communication channels, does not need an additional power source, is not easy to lose, long in service, convenient to carry, low in error rate, high in communication speed and low in power consumption and the like.

Description

An identification system and method based on white light communication

technical field

The invention relates to an identification system, in particular to an identification system and method for an LED miner's lamp based on white light communication, which are suitable for underground coal mines.

Background technique

At present, LED white light is developing rapidly, and the technology in various fields of lighting and communication tends to be mature. Compared with other heat-generating light sources or gas discharge light sources, LED lighting is a new type of solid-state light source with high energy utilization rate, good stability and consistency, fast response speed, energy saving, and no pollution.

In the attendance, tracking, positioning, and disaster relief of underground personnel in coal mines, the RFID (identification information) cards carried by miners are the most important information acquisition and management methods. At present, the identification and attendance of underground personnel mainly rely on RFID passive cards (radio frequency identification cards), 2.4G active cards, etc. to send identity information. The remote receiving probe receives the card information through electromagnetic waves, and restores it after signal processing. into ID information. This method is easy to solve problems such as punching or missing cards, and requires absentees to carry extra radio frequency cards with them. At the same time, since the radio frequency cards are always emitting electromagnetic waves, the damage to the human body is inevitable.

Contents of the invention

In order to solve the above technical problems, the present invention does not need to carry any additional equipment on the basis of the existing miner's lamp that must be carried by the miner, but only adds a certain coding and modulation circuit, and then realizes the identification of the LED miner's lamp.

An identity recognition system based on white light communication of the present invention includes a white light LED miner's lamp and a white light receiving detector;

The white LED miner's lamp includes a lithium battery, a driver, a transmitting encoder and an LED lamp holder, the transmitting encoder is connected to the driver through a line, the driver is connected to the LED lamp holder through a line, and the lithium battery supplies power to the driver, the transmitting encoder and the LED lamp holder;

The white light receiving detector includes a white light receiver, a power supply, an amplifying filter, a decoder and a communication interface, the white light receiver is connected to the amplifying filter through a line, and the amplifying filter is connected to a decoder through a line, and the decoder The communication interface is connected through a line; the power supply supplies power for the white light receiver, the amplification filter and the decoder.

In an identification method based on white light communication of the present invention, the emission encoder is responsible for reading out the ID number of the miner stored in the non-volatile memory, and the emission is decoded and output in a Manchester encoding manner Into the driver, the driver controls the light-emitting circuit of the white light LED through the high-speed MOS circuit through the ID code data, and emits the identity ID into the air medium through the modulated white light;

The white light receiver is responsible for receiving the coded light signal sent by the white light LED miner's lamp, and amplifies it through the amplification filter, and then completes the ID information reading through the decoder, and the decoder is connected with the external controller through the communication interface to complete the management of underground personnel Work.

The transmitting encoder is an ultra-low-power single-chip microcomputer, and its working mode is to wake up 5 times per second, and the working time after each wake-up is 1ms. After waking up, it starts broadcasting and sending the unique identity stored in the non-volatile memory. ID information, transmit encoding encodes the binary stream of the identity ID into a pulse sequence according to the Manchester mode, which is used to control the high-frequency flashing of the LED.

The LED lamp head mainly includes a main lamp, an array of auxiliary lamps and a reflector. The pulse signal after passing through the driver mainly drives the main lamp to flash in a certain way, and the auxiliary lamp is constant.

The white light receiver includes a narrow-band light-transmitting film, a focusing lens, and a photoelectric receiving tube; the modulated optical signal first passes through the narrow-band light-transmitting film, and its transmission wavelength is 400-450nm, and is focused onto the photoelectric receiving tube through a lens. converted to a current signal.

The decoder is an ultra-low-power single-chip microcomputer, after recovering the clock of the electrical signal after passing through the amplification filter, according to the Manchester decoding method, the modulated signal is restored to the original binary sequence, and converted into ID card number.

Compared with prior art, the beneficial effects of the present invention are:

1. The present invention does not require additional equipment, and only needs to add a transmitting encoder and a driver circuit on the basis of the existing LED miner's lamp. This circuit module has the characteristics of miniaturization and low power consumption, and basically does not affect the original LED Lighting function;

2. LED lighting has the advantages of green energy, low power consumption, no pollution, and long life. Compared with existing RFID passive or active cards, it does not require additional power supply, is not easy to lose, has a long life, is easy to carry, and has no code errors Low rate, high communication rate and other obvious advantages.

Description of drawings

FIG. 1 is a schematic structural diagram of an identification system for white light LED communication in the present invention.

In the accompanying drawings, the list of parts represented by each label is as follows:

1. White light LED miner's lamp, 2. White light receiving probe, 101, lithium battery, 102, driver, 103, transmitting encoder, 104, reflector; 201, blue narrow-band light-transmitting film, 202, lens, 203, photoelectric receiving tube , 204, power supply, 205, amplification filter, 206, decoder, 207, communication interface.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

As shown in Fig. 1, a kind of identification system based on white light communication of the present invention comprises white light LED miner's lamp 1 and white light receiving detector 2, and white light LED miner's lamp 1 is explosion-proof LED miner's lamp, and the power supply adopts maintenance-free 3.7 volt lithium The battery 101 supplies power, and the luminous power is 3 watts.

White LED miner's lamp 1 includes a lithium battery 101, a driver 102, a transmitting encoder 103 and an LED lamp holder 104. The transmitting encoder 103 is connected to the driver 102 through a line, and the driver 102 is connected to the LED lamp holder 104 through a line. The lithium battery 1 is the driver 102, the transmitting encoder 103 and LED lamp holder 104 are powered;

White light receiving detector 2 comprises white light receiver, power supply 204, amplifying filter 205, decoder 206 and communication interface 207, and white light receiver connects amplifying filter 205 by line, and amplifying filter 205 connects decoder 206 by line, and decoder 206 is connected to the communication interface 207 through a line; the power supply 204 supplies power for the white light receiver, the amplification filter 205 and the decoder 206 .

In an identification method based on white light communication of the present invention, the transmitting encoder 103 is responsible for reading out the ID number of the miner stored in the non-volatile memory, and outputting it to the driver in Manchester encoding mode after transmitting and decoding , the driver 102 controls the light-emitting circuit of the white light LED through the ID code data through the high-speed MOS circuit, and emits the identity ID into the air medium through the modulated white light;

The white light receiver is responsible for receiving the coded light signal sent by the white LED miner's lamp, and amplifies it through the amplification filter 205, and then completes the ID information reading through the decoder 206, and the decoder 206 is connected with the external controller through the communication interface 207 to complete the underground personnel management work.

The transmitting encoder 103 is an ultra-low-power single-chip microcomputer. Its working mode is to wake up 5 times per second, and the working time after each wake-up is 1ms. After waking up, it starts to broadcast and send the unique ID stored in the non-volatile memory. Information, transmit encoding encodes the binary stream of the identity ID into a pulse sequence according to the Manchester mode, which is used to control the high-frequency blinking of the LED.

The LED lamp holder 104 mainly includes a main lamp, an array of auxiliary lamps and a reflector. The pulse signal after passing through the driver 102 mainly drives the main lamp to flash in a certain way, and the auxiliary lamp is constant.

The white light receiver includes a narrow-band light-transmitting film 201, a lens 202 and a photoelectric receiving tube 203; the modulated optical signal first passes through the narrow-band light-transmitting film 201, and its transmission wavelength is 400-450nm, and is focused to the photoelectric receiving tube through the lens 202 203 , converted into a current signal.

Decoder 206 is an ultra-low-power single-chip microcomputer. After the clock recovery of the electrical signal passed through the amplification filter 205, the modulated signal is restored to the original binary sequence according to the Manchester decoding method, and converted into an ID card number.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (6)

1. A kind of identification system based on white light communication, it is characterized in that: comprise white light LED miner's lamp and white light receiving detector; The white LED miner's lamp includes a lithium battery, a driver, a transmitting encoder and an LED lamp holder, the transmitting encoder is connected to the driver through a line, the driver is connected to the LED lamp holder through a line, and the lithium battery supplies power to the driver, the transmitting encoder and the LED lamp holder; The white light receiving detector includes a white light receiver, a power supply, an amplifying filter, a decoder and a communication interface, the white light receiver is connected to the amplifying filter through a line, and the amplifying filter is connected to a decoder through a line, and the decoder The communication interface is connected through a line; the power supply supplies power for the white light receiver, the amplification filter and the decoder. 2. A kind of identification method based on white light communication as claimed in claim 1, it is characterized in that: described emission coder is responsible for reading out the miner's identity ID number that is stored in the non-volatile memory, after described emission decoding Output to the driver by means of Manchester encoding, the driver controls the light-emitting circuit of the white light LED through the high-speed MOS circuit through the ID code data, and emits the identity ID into the air medium through the modulated white light; The white light receiver is responsible for receiving the coded light signal sent by the white light LED miner's lamp, and amplifies it through the amplification filter, and then completes the ID information reading through the decoder, and the decoder is connected with the external controller through the communication interface to complete the management of underground personnel Work. 3. A kind of identification method based on white light communication as claimed in claim 1, it is characterized in that: described transmitting coder is a single-chip microcomputer of ultra-low power consumption, and its working mode is to wake up 5 times per second, every time After waking up, the working time is 1ms. After waking up, it starts to broadcast and send the unique ID information stored in the non-volatile memory. The transmission code encodes the binary stream of the ID into a pulse sequence according to Manchester mode, which is used for control High-frequency flickering of LEDs. 4. An identification method based on white light communication as claimed in claim 1, characterized in that: said LED lamp head mainly includes a main lamp, an array of auxiliary lamps and a reflector, and the pulse signal after passing through said driver mainly drives the main The light flashes in a certain way, and the secondary light is constant. 5. A kind of identification method based on white light communication as claimed in claim 1, it is characterized in that: described white light receiver comprises narrow-band light-transmitting sheet, focusing lens, photoelectric receiving tube; After the optical signal after modulation first passes through narrow-band The light-transmitting sheet, whose transmission wavelength is 400-450nm, is focused on the photoelectric receiving tube through the lens, and converted into a current signal. 6. A kind of identification method based on white light communication as claimed in claim 1, it is characterized in that: described decoder is the single-chip microcomputer of ultra-low power consumption, after the electric signal after the described amplifying filter is clock recovered, According to the Manchester decoding method, the modulated signal is restored to the original binary sequence and converted into an ID card number.