CN103426222A - Light-dependent control door guard device - Google Patents
Light-dependent control door guard device Download PDFInfo
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- CN103426222A CN103426222A CN201310406559XA CN201310406559A CN103426222A CN 103426222 A CN103426222 A CN 103426222A CN 201310406559X A CN201310406559X A CN 201310406559XA CN 201310406559 A CN201310406559 A CN 201310406559A CN 103426222 A CN103426222 A CN 103426222A
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Abstract
The invention discloses a light-dependent control door guard device. The light-dependent control door guard device comprises a light key and a light-dependent control lock. The light key comprises a light-emitting module, a light key control module and a three-phase switch. The light-dependent control lock comprises a light-receiving module, a judging module, a light lock control module and a lock controlled module. Light-dependent control door guard data are sent and received in a data frame mode. Data frames comprise an unlocking frame, a pass word changing frame and a reset frame. The light key adopts differential Manchester code modulation in an unlocking mode. The data frames are periodically sent and propagated in a high-speed and flashing information carrying beam mode. The light-dependent lock senses and receives information carrying beams with data and converts the information carrying beams into corresponding data frames according to an agreed rule, pass words are changed, reset and verified according to the data frames, and opening and closing of the light-dependent control lock are controlled. The light-dependent control lock conducts presampling on judged electrical output signals to adapt to different mobile phone light keys. The light-dependent control door guard device improves the universality and safety of door guard.
Description
Technical field
The present invention relates to the visible light communication technical field, particularly a kind of light-operated entrance guard device.
Background technology
Visible light communication technology (Visible Light Communication, VLC) is to utilize visible ray as information carrier, the communication mode of direct transmitting optical signal in air.LED communication is that the High Speed Modulation light wave signal sent with light emitting diode (Light Emitting Diode, LED) comes information modulation and transmission, then utilizes the device such as photodiode to receive optical carrier with acquired information.A visible LED communication system, be divided into light signal emission and light signal and receive two parts.At transmitting terminal, source signal is converted into the electric signal of being convenient to the optical channel transmission, then is modulated into the LED light signal of light carrier Strength Changes.At receiving end, can carry out reception technique to signal optical source, and light signal is reduced into to electric signal output.
At present, wireless access control system mainly adopts wireless radio-frequency, and this technology has good penetrability, yet this characteristic makes again radio frequency signal easily by electromagnetic interference (EMI), is copied by being intercepted and captured, and causes the leakage of information of unblanking and causes property loss.
Visible ray is not subject to electromagnetic interference (EMI), do not have a penetrability, thereby has a lot of securities.The visible ray technology is had great significance for designing and producing of gate inhibition.
Summary of the invention
The object of the present invention is to provide a kind of light-operated entrance guard device.
Light-operated entrance guard device comprises: optical key, light-operated lock.
Optical key comprises: light emission module, optical key control module and threephase switch.Optical key adopts special-purpose circuit design to make, and also can adopt mobile phone, panel computer or camera intelligent hand-held terminal with flashlamp.
Light emission module is used for converting the electric signal of unblanking to light signal, and sends with the information carrying beam form.Light emission module, adopt light emitting diode to carry out the electric light conversion.The optical key control module generates by data the electric signal of unblanking for coding rule according to a preconcerted arrangement, controls light emission module work.Threephase switch is for selecting three kinds of states of key: throw light on, unblank, close.
Optical key comprises two mode of operations: throw light on, unblank.
Light-operated lock comprises: Optical Receivers, judging module, light lock control module, lock controlled module.
Optical Receivers has carried the information carrying beam of data for responding to receive, and is converted into corresponding analog electrical signal.Optical Receivers, adopt photodiode to carry out opto-electronic conversion.The analog electrical signal of judging module for judging that Optical Receivers is exported, and convert corresponding digital electric signal to.Light lock control module is for the digital electric signal according to judging module output, and decoding rule according to a preconcerted arrangement is reduced into data by digital signal, and judge whether these data are effectively, and open and close light-operated lock according to data modification password, reseting cipher or control lock controlled module.
The data of light-operated gate control system, with the form transmitting-receiving of Frame.
Data frame type comprises: the frame of unblanking, change close frame, reset frame.Frame comprises 6 fields: frame head, data type, data A length, data A, data B length, data B.
Frame header fields is used for meaning the beginning of frame data, and for clock synchronous.Data type is for meaning type and the effect of Frame.Data A length field is used to indicate the length of data A field.Data B length field is for meaning data B field length.
Each numeric data code of Frame adopts binary number, i.e. and " 0 " and " 1 ", and adopt Differential Manchester Encoding to be modulated.In the Differential Manchester Encoding rule, there is a saltus step centre of each numeric data code, and clock signal, date number had again both been made in the saltus step in the middle of position.When starting, data bit changes signal polarity, presentation logic " 0 "; When starting, data bit do not change signal polarity, presentation logic " 1 ".
In addition, for the ease of the self-adaptation identification of light-operated lock, optical key is processed while sending Frame, 1 " 0 " of rear benefit in 4 continuous " 1 " of every appearance.Delete when light-operated interlocking is received deal with data this " 0 " of filling.
Frame is propagated with the information carrying beam form of flicker at a high speed.
Light emitting diode " bright " means the high level of numeric data code, and " going out " means the low level of numeric data code.
Optical key is under light illumination mode, and the optical key control module is not worked, and only lights illumination light-emitting diode.
By optical key, under unlock mode, the optical key control module is according to Frame, adopts the Differential Manchester Encoding mode to generate the electric signal of unblanking, and sends this signal to the light emission module circulation, controls light emitting diode " bright, the go out " flicker of light emission module.
The present invention has improved gate inhibition's versatility, security.
The accompanying drawing explanation
The system architecture diagram that Fig. 1 is the embodiment of the present invention.
The pre-sampling process flow diagram that Fig. 2 is embodiment of the present invention light lock control module.
The main flow chart that Fig. 3 is embodiment of the present invention light lock control module.
The close process flow diagram that changes that Fig. 4 is embodiment of the present invention light lock control module.
The process flow diagram that resets that Fig. 5 is embodiment of the present invention light lock control module.
Mark in figure: 1-light emission module; 2-optical key control module; The 3-threephase switch; The 4-Optical Receivers; The 5-judging module; 6-light lock control module; 7-locks controlled module; The 8-information carrying beam; The 9-mobile phone; The 10-flashlamp.
Embodiment
Embodiment:
Light-operated entrance guard device comprises: optical key, light-operated lock.
Optical key comprises: light emission module 1, optical key control module 2 and threephase switch 3, the present embodiment will be used as optical key with the mobile phone 9 of flashlamp 10.The function of light emission module 1 realizes with the flashlamp of mobile phone 9.
Wherein, light emission module 1 converts light signal to for the electric signal by unblanking, and sends with information carrying beam.Light emission module 1, adopt light emitting diode to carry out the electric light conversion.Optical key control module 2, for the generation electric signal of unblanking, is controlled light emission module 1 work.Threephase switch 3 is for selecting three kinds of duties of key: throw light on, unblank, close.
Light-operated lock comprises: Optical Receivers 4, judging module 5, light lock control module 6, lock controlled module 7.
Data frame type comprises: the frame of unblanking, change close frame, reset frame.
Data frame format comprises 6 fields: frame head, data type, data A length, data A, data B length, data B.Data frame format is as following table:
Table 1: data frame format table
| ? | Frame head | Data type | Data A length | Data A | Data B length | Data B |
| The frame of unblanking | 10101100 | 001 | 00001000 | 8 passwords | Empty | Empty |
| Change close frame | 10101100 | 010 | 00001000 | Old 8 passwords | 00010010 | New 10 passwords |
| Reset frame | 10101100 | 100 | 00001000 | 8 reseting ciphers | 00001000 | 8 initial passwords |
| Invalid frame | 10101100 | Other | XXXXXXX | XXXXX | XXXXXX | XXXXXXX |
The numeric data code of Frame adopts binary number representation, i.e. and " 0 " and " 1 ", numeric data code adopts Differential Manchester Encoding to mean.In Differential Manchester Encoding, there is a saltus step centre of each numeric data code, and clock signal, date number had again both been made in the saltus step in the middle of position.When starting, data bit changes signal polarity, presentation logic " 0 "; When starting, data bit do not change signal polarity, presentation logic " 1 ".
In addition, for the ease of the self-adaptation identification of light-operated lock, optical key is processed while sending Frame, 1 " 0 " of rear benefit in 4 continuous " 1 " of every appearance.Delete when light-operated lock record data frame this " 0 " of filling.
Frame is propagated with the information carrying beam form of flicker at a high speed.
Light emitting diode " bright " means the high level of numeric data code, and light emitting diode " goes out " and means the low level of numeric data code.
Optical key is under light illumination mode, and optical key control module 2 is not worked, and only lights illumination light-emitting diode.
By optical key under unlock mode.Optical key control module 2 is according to Frame, adopts the Differential Manchester Encoding mode to generate the electric signal of unblanking, and sends this signal to light emission module 1 circulation, controls light emitting diode " bright, the go out " flicker of light emission module 1.
The workflow of light-operated guard method is as follows:
(1) optical key
The threephase switch of optical key is placed in to unlock mode.Under unlock mode, the Frame that optical key control module 2 will adopt the Differential Manchester Encoding mode to do modulation treatment generates the electric signal of unblanking, and send this signal to light emission module 1 circulation, control " bright ", " going out " flicker of the light emitting diode of light emission module 1.Wherein, data frame format as mentioned above.Simultaneously, in Frame, 1 " 0 " is mended in the back of 4 continuous " 1 " of every appearance.
The Frame of processing through mending " 0 ", send with the information carrying beam 8 form circulations of glimmering at a high speed, and a numeric data code cycle that sends Frame is T.
(2) light-operated lock
Receive and carried the information carrying beam 8 of data with Optical Receivers 1 induction, and be converted into corresponding analog electrical signal.Judging module 5 digital electric signal corresponding to the analog electrical signal of input converts to again.Light lock control module 5 is according to the digital electric signal of the output signal identification decision reception of judging module 5, and coding rule according to a preconcerted arrangement is reduced into Frame by digital signal, and judge whether this Frame is effectively, and open and close light-operated lock according to Frame Modify password, reseting cipher or control lock controlled module 7.
Except adopting special-purpose circuit design to make, adopt the mobile phone 9 with flashlamp 10 due to optical key.And the microcontroller dominant frequency that every money mobile phone uses is different, so consider based on versatility, at first to sample in advance to the electric signal of judging module 5 outputs, obtain the frequency T of signal.
Pre-sampling principle: in Differential Manchester Encoding, there is a saltus step centre of each numeric data code, and clock signal, date number had again both been made in the saltus step in the middle of position.When starting, data bit changes signal polarity, presentation logic " 0 "; When starting, data bit do not change signal polarity, presentation logic " 1 ".
Known according to the Differential Manchester Encoding mode, if suppose the lasting cycle T of a numeric data code, bits per inch is according in the middle of code, and there is a voltage jump at the T/2 place.As changed signal polarity, presentation logic " 0 " when data bit starts; When starting, data bit do not change signal polarity, presentation logic " 1 ".If the next bit data are " 0 ", when starting, data bit changes signal polarity, there will be high level or low level that a duration is T.If the next bit data are " 1 ", when starting, data bit changes signal polarity, there will be high level or low level that a duration is T.
The pre-sampling flow process of light lock control module 6 is as follows:
Step Y1: with the fastest sample frequency f
0Whether the judgement output signal, detecting is high level if being sampled.
Step Y2: high level if starts timing t
0, and start with frequency f simultaneously
0The sample detecting low level; If not, continue to detect high level.
Step Y3: low level if, restart timing t
0, and start with frequency f simultaneously
0The sample detecting high level; If not, continue to detect high level, until t
0Timing surpasses setting value, just directly exits the whole flow process of unblanking.
Step Y4: high level if is illustrated as the valid data input, the cycle detection that just enters step Y5; If not, continue to detect high level, until t
0Timing surpasses setting value, just directly exits the whole flow process of unblanking.
Step Y5: cycle detection, start 6 circulations, detect incoming level.(wherein, i is loop variable, and initial value is 0, the i+1 that at every turn circulates, i is less than 6).
Step Y5.1: timing Δ t
2i+1, and with f
0Sampled, whether cycle detection is low level.Low level enters step 5.2 if.Otherwise, continue to detect low level, until timing surpasses setting value, just directly exit the whole flow process of unblanking.
Step Y5.2: low level, timing Δ t if
2i+2, and continue with frequency f
0Sampled, whether cycle detection is high level, and high level enters the circulation next time of step 5 if.Otherwise, continue to detect high level, until timing surpasses setting value, just directly exit the whole flow process of unblanking.
Step Y6: after circulation finishes, according to Δ t
2i+2, Δ t
2i+1, extrapolate the duration T of a data.
Step Y7: time of return T.
The main flow of light lock control module 6:
Step Z1: the output level to judging module is sampled in advance, calculates optical key and sends a numeric data code cycle T;
Step Z2: with cycle t<(T/2) output signal of judging module is sampled, according to data frame format scan-data frame head.If the data frame head detected, start the record data frame, until next data frame head detected, or lasting high level or low level detected.
Step Z3: detect the data frame type field, unlock mode, enter step Z9 if; Change if close pattern, enter and change close flow process; Reset mode, enter the flow process that resets if; Other numerical value, directly exit if, termination routine.
Step Z4: according to the value N1 of data A length field, read the binary sequence that receives code data;
Step Z5: the password that this binary sequence of just reading and light lock control module are preserved is compared, if comparison is consistent, by control circuit, drives controlled device and will lock unlatching; Otherwise, will keep lock to close and shut-off circuit.
Light lock control module 6 change close flow process:
Step G1: according to data A length field value N1, read the binary sequence that receives the original code data;
Step G2: the password of the binary sequence of original code data and the preservation of light lock control module is compared, if comparison is consistent, enter step G2; If compare inconsistently, close locking and exit.
Step G3: according to data B length field value N2, read the binary sequence that receives the new password data, and deposit light lock control module in.
The flow process that resets of light lock control module 6:
Step F 1: according to data A length field value N1, read the binary sequence that receives the reseting cipher data.
Step F 2: the reseting cipher that the binary sequence of the reseting cipher data that this is received and light lock control module are preserved is compared.If comparison is consistent, enter step F 2; If compare inconsistently, close locking and exit.
Step F 3: according to data B length field value N2, read the binary sequence that receives the initial password data, and deposit light lock control module in.
Claims (1)
1. a light-operated entrance guard device, is characterized in that light-operated entrance guard device comprises: optical key, light-operated lock;
Optical key comprises: light emission module, optical key control module and threephase switch; Optical key adopts special-purpose circuit design to make, and also can adopt mobile phone, panel computer or camera intelligent hand-held terminal with flashlamp;
Light emission module is used for converting the electric signal of unblanking to light signal, and sends with the information carrying beam form; Light emission module, adopt light emitting diode to carry out the electric light conversion; The optical key control module generates by data the electric signal of unblanking for coding rule according to a preconcerted arrangement, controls light emission module work; Threephase switch is for selecting three kinds of states of key: throw light on, unblank, close;
Optical key comprises two mode of operations: throw light on, unblank;
Light-operated lock comprises: Optical Receivers, judging module, light lock control module, lock controlled module;
Optical Receivers has carried the information carrying beam of data for responding to receive, and is converted into corresponding analog electrical signal; Optical Receivers, adopt photodiode to carry out opto-electronic conversion; The analog electrical signal of judging module for judging that Optical Receivers is exported, and convert corresponding digital electric signal to; Light lock control module is for the digital electric signal according to judging module output, and decoding rule according to a preconcerted arrangement is reduced into data by digital signal, and judge whether these data are effectively, and open and close light-operated lock according to data modification password, reseting cipher or control lock controlled module;
The data of light-operated gate control system, with the form transmitting-receiving of Frame;
Data frame type comprises: the frame of unblanking, change close frame and reset frame; Frame comprises 6 fields: frame head, data type, data A length, data A, data B length and data B;
Frame header fields is used for meaning the beginning of frame data, and for clock synchronous; Data type is for meaning type and the effect of Frame; Data A length field is used to indicate the length of data A field; Data B length field is for meaning data B field length;
Each numeric data code of Frame adopts binary number, i.e. and " 0 " and " 1 ", and adopt Differential Manchester Encoding to be modulated; In the Differential Manchester Encoding rule, there is a saltus step centre of each numeric data code, and clock signal, date number had again both been made in the saltus step in the middle of position; When starting, data bit changes signal polarity, presentation logic " 0 "; When starting, data bit do not change signal polarity, presentation logic " 1 ";
For the ease of the self-adaptation identification of light-operated lock, optical key is processed while sending Frame, 1 " 0 " of rear benefit in 4 continuous " 1 " of every appearance; Delete when light-operated interlocking is received deal with data this " 0 " of filling;
Frame is propagated with the information carrying beam form of flicker at a high speed;
Light emitting diode " bright " means the high level of numeric data code, and " going out " means the low level of numeric data code;
Optical key is under light illumination mode, and the optical key control module is not worked, and only lights illumination light-emitting diode;
By optical key, under unlock mode, the optical key control module is according to Frame, adopts the Differential Manchester Encoding mode to generate the electric signal of unblanking, and sends this signal to the light emission module circulation, controls light emitting diode " bright, the go out " flicker of light emission module.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956035A (en) * | 2014-04-27 | 2014-07-30 | 桂林理工大学 | Dual-mode wireless control method |
| CN104715532A (en) * | 2015-04-07 | 2015-06-17 | 南开大学 | Electronic coded lock system based on visible light communication technique and encryption method of system |
| CN105788046A (en) * | 2016-03-09 | 2016-07-20 | 宁波萨瑞通讯有限公司 | Unlocking and door opening system and method based on mobile phone LED light |
| CN105809791A (en) * | 2016-03-10 | 2016-07-27 | 文成县刀锋科技有限公司 | Access control system based on visible light communication |
| CN106033629A (en) * | 2016-03-20 | 2016-10-19 | 文成县刀锋科技有限公司 | Entrance guard system based on visible light communication and mobile terminal |
| CN103956034B (en) * | 2014-04-27 | 2017-01-25 | 桂林理工大学 | Visible light communication and radio frequency identification dual-mode wireless control device |
| CN108989708A (en) * | 2018-07-25 | 2018-12-11 | 长芯盛（武汉）科技有限公司 | The low speed signal photoelectric conversion module of all-purpose belt multimedia interface |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110088440A1 (en) * | 2008-06-16 | 2011-04-21 | Henry Feil | Key with a Key Light Function |
| CN102610013A (en) * | 2012-02-29 | 2012-07-25 | 深圳光启创新技术有限公司 | Visible light communication method and data storage system based on visible light communication |
| CN102677969A (en) * | 2012-04-28 | 2012-09-19 | 深圳光启创新技术有限公司 | Photon key and light-operated door lock matched with same |
| CN103093519A (en) * | 2011-10-31 | 2013-05-08 | 深圳光启高等理工研究院 | Light-operated lock system and its realization method |
| CN103177497A (en) * | 2013-04-16 | 2013-06-26 | 桂林理工大学 | Visible light intelligent access control method |
-
2013
- 2013-09-09 CN CN201310406559XA patent/CN103426222A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110088440A1 (en) * | 2008-06-16 | 2011-04-21 | Henry Feil | Key with a Key Light Function |
| CN103093519A (en) * | 2011-10-31 | 2013-05-08 | 深圳光启高等理工研究院 | Light-operated lock system and its realization method |
| CN102610013A (en) * | 2012-02-29 | 2012-07-25 | 深圳光启创新技术有限公司 | Visible light communication method and data storage system based on visible light communication |
| CN102677969A (en) * | 2012-04-28 | 2012-09-19 | 深圳光启创新技术有限公司 | Photon key and light-operated door lock matched with same |
| CN103177497A (en) * | 2013-04-16 | 2013-06-26 | 桂林理工大学 | Visible light intelligent access control method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956035A (en) * | 2014-04-27 | 2014-07-30 | 桂林理工大学 | Dual-mode wireless control method |
| CN103956034B (en) * | 2014-04-27 | 2017-01-25 | 桂林理工大学 | Visible light communication and radio frequency identification dual-mode wireless control device |
| CN104715532A (en) * | 2015-04-07 | 2015-06-17 | 南开大学 | Electronic coded lock system based on visible light communication technique and encryption method of system |
| CN104715532B (en) * | 2015-04-07 | 2017-06-30 | 南开大学 | A kind of encryption method based on the electronic coding lock system of visible light communication technology and the system |
| CN105788046A (en) * | 2016-03-09 | 2016-07-20 | 宁波萨瑞通讯有限公司 | Unlocking and door opening system and method based on mobile phone LED light |
| CN105809791A (en) * | 2016-03-10 | 2016-07-27 | 文成县刀锋科技有限公司 | Access control system based on visible light communication |
| CN106033629A (en) * | 2016-03-20 | 2016-10-19 | 文成县刀锋科技有限公司 | Entrance guard system based on visible light communication and mobile terminal |
| CN108989708A (en) * | 2018-07-25 | 2018-12-11 | 长芯盛（武汉）科技有限公司 | The low speed signal photoelectric conversion module of all-purpose belt multimedia interface |
| CN108989708B (en) * | 2018-07-25 | 2021-01-08 | 长芯盛（武汉）科技有限公司 | Low-speed control signal photoelectric conversion module of universal multimedia interface |
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Application publication date: 20131204 |