CN102760315B - Light control door lock with good signal receiving performance - Google Patents
Light control door lock with good signal receiving performance Download PDFInfo
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- CN102760315B CN102760315B CN201210220539.9A CN201210220539A CN102760315B CN 102760315 B CN102760315 B CN 102760315B CN 201210220539 A CN201210220539 A CN 201210220539A CN 102760315 B CN102760315 B CN 102760315B
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- 230000003287 optical effect Effects 0.000 claims description 36
- 238000000926 separation method Methods 0.000 claims description 12
- 238000007493 shaping process Methods 0.000 claims description 10
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000013256 coordination polymer Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 239000002800 charge carrier Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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Abstract
The invention relates to a light control door lock with good signal receiving performance. The light control door lock comprises a light signal receiving module, a microprocessor module and an electric control lock main body, wherein a Fresnel condensing lens structure is arranged on one side of the light signal receiving module, and the Fresnel condensing lens structure is used for focusing light signals transmitted by a photon key onto the light signal receiving module; the light signal receiving module is used for converting the light signals transmitted by the photon key to electric signals; and the microprocessor module is used for controlling the electric control lock main body to open or close according to the electric signals. According to the light control door lock disclosed by the invention, the Fresnel condensing lens structure is arranged on one side of the light signal receiving module, and the Fresnel condensing lens structure can focus the light signals transmitted by the photon key onto the light signal receiving module, so that the light signal receiving module can receive the stronger light signals, the light control door lock is less prone to producing misjudgment and the light signal receiving performance is improved.
Description
Technical field
The present invention relates to a kind of light-operated door lock, particularly relate to the light-operated door lock that a kind of signal receiving performance is good.
Background technology
The communication mode of visible light communication to be a kind of with light wave be transmission medium, the high speed light and shade flash signal that what it utilized fluorescent light or light emitting diode etc. to send be invisible to the naked eye carrys out transmission information.Visible light communication has following outstanding advantages: 1. visible light communication is green resource, there is not electromagnetic radiation; 2. light is had just can to communicate, without communication blind district, convenient and swift; 3. visible light communication emissive power is high; 4. without the need to radio-frequency spectrum certification; 5., large, the good confidentiality of transmission frequency bandwidth, message capacity and anti-electromagnetic interference capability strong.Thus, visible light communication is widely applied gradually in fields such as data transmission, gate control systems.
Gate control system belongs to the category of public safety system, is widely used a kind of high-tech safety installations.Light signal is not easy to be decrypted, and security is high, is thus comparatively favored in gate control system.The light-operated door lock that the gate control system of existing optical signal transmission information comprises photon key and coordinates with described photon key, described photon key is by launching the light signal containing information constantly dodging and go out, described light signal resolved by described light-operated door lock, thus carries out action of opening the door or close the door.Described photon key is provided with the photodiode for launching described light signal, and the side of described photodiode is provided with the transparent protection plate for the protection of described photodiode.But described transparent protection plate has certain decay to light signal, light-operated door lock is thus easily made to produce erroneous judgement.
Summary of the invention
Technical matters to be solved by this invention is, for above-mentioned the deficiencies in the prior art, proposes the light-operated door lock that a kind of signal receiving performance is good.
The technical solution adopted for the present invention to solve the technical problems is, a kind of light-operated door lock is proposed, it comprises optical signal receiving module, microprocessor module and electric control lock main body, the side of described optical signal receiving module is provided with Fresnel light condensing lens structure, and described Fresnel light condensing lens structure focuses on described optical signal receiving module for light signal photon key launched; The light signal that described optical signal receiving module is used for photon key to launch converts electric signal to; Described microprocessor module is used for controlling described electric control lock main body according to described electric signal and opens or close.
Further, described optical signal receiving module side is provided with fender, and described fender is provided with the light hole for penetrating described light signal, and described Fresnel light condensing lens vibrational power flow is on described light hole.
Further, described optical signal receiving module comprises photodiode, and described Fresnel light condensing lens structure is used for light receiving surface place light signal light being focused on photoelectric diode.
Further, described light-operated door lock also comprises decoding module, and described decoding module is translated into the digital signal of NRZ code for digital signal optical signal receiving module being passed the CMI code of coming.
Further, described decoding module comprises high-low-position separation circuit and decoding operation circuit, described high-low-position separation circuit is used for the high-low-position of the CMI code received to be separated, and described decoding operation circuit is used for the high-low-position after to described CMI code separation and carries out same or computing.
Further, described light-operated door lock also comprises balanced Shaping Module, and the signal that described balanced Shaping Module is used for optical signal receiving module exports carries out elimination intersymbol interference and corrects pulse waveform.
Further, described balanced Shaping Module comprises the operational amplifier and comparer that are electrically connected to each other, the input end of described operational amplifier and an input end of described comparer are all electrically connected with the output terminal of described optical signal receiving module, and the output terminal of described comparer is electrically connected with described decoding module.
Further, described optical signal receiving module comprises photodiode, signal amplifier and bandpass filter, and described photodiode and described bandpass filter are electrically connected with described signal amplifier respectively.
Further, described photodiode is PIN photodiode or avalanche photodide.
Further, described signal amplifier is logarithmic amplifier or trans-impedance amplifier.
In sum, the light-operated door lock of the present invention is by being provided with described Fresnel light condensing lens structure in the side of described optical signal receiving module, the light signal that photon key launches can focus on described optical signal receiving module by described Fresnel light condensing lens structure, thus described optical signal receiving module is made can to receive stronger light signal, be not easy to make light-operated door lock produce erroneous judgement, improve light signal receptivity.
Accompanying drawing explanation
Fig. 1 is the theory diagram of an embodiment of the present invention.
Fig. 2 be optical signal receiving module of the present invention shown in Fig. 1 and fender and Fresnel light condensing lens respective outer side edges time schematic diagram.
Fig. 3 is the theory diagram of the balanced Shaping Module of the present invention shown in Fig. 1.
Fig. 4 is the theory diagram of decoding module of the present invention shown in Fig. 1.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention will be further described:
Refer to Fig. 1 and Fig. 2, the light-operated door lock that signal receiving performance of the present invention is good comprises optical signal receiving module 1, balanced Shaping Module 2, decoding module 3, microprocessor module 4 and electric control lock main body 5.Described optical signal receiving module 1 converts electric signal to for light signal photon key launched, and the pattern of the light signal that described photon key is launched is CMI code.Described optical signal receiving module 1 comprises photodiode 11, signal amplifier 12 and bandpass filter 13, and described photodiode 11 and described bandpass filter 13 are electrically connected with described signal amplifier 12 respectively.In the present embodiment, described photodiode 11 is avalanche photodides, and described signal amplifier 12 is trans-impedance amplifiers.
Described avalanche photodide is that a kind of light of p-n junction type detects diode, it makes use of the avalanche multiplication effect of charge carrier to amplify photosignal to improve the sensitivity detected.Thus, avalanche photodide compared with vacuum photomultiplier, described avalanche photodide have small-sized, do not need the advantages such as high-voltage power supply, be more suitable for practical application; Compared with general semiconductor photo diode, described avalanche photodide has the advantages such as highly sensitive, speed is fast.Described trans-impedance amplifier has the advantages such as gain stabilization, dynamic range are large, bandwidth.
The side of described optical signal receiving module 1 is provided with fender 6; described fender 6 is provided with the light hole (in figure non-label) for penetrating described light signal; described light hole is provided with Fresnel light condensing lens structure 7, described Fresnel light condensing lens structure 7 focuses on the light receiving surface place of photoelectric diode 11 for light signal photon key launched.Described Fresnel light condensing lens structure 7 is fabricated on the described light hole of fender 6 by mould pressing technology or etching etc.In the present embodiment, described fender 6 is a part for described light-operated door lock shell, and described Fresnel light condensing lens structure 7 is for be fabricated on described light hole by mould pressing technology.Described Fresnel light condensing lens structure 7 is prior art, does not repeat them here.
Refer to Fig. 3, described balanced Shaping Module 2 carries out elimination intersymbol interference for the signal exported optical signal receiving module 1 and corrects pulse waveform, it comprises the operational amplifier 21 and comparer 22 that are electrically connected to each other, the input end of described operational amplifier 21 and an input end of described comparer 22 are all electrically connected with signal amplifier 12 output terminal of described optical signal receiving module 1, and the output terminal of described comparer 22 is electrically connected with described decoding module 3.
Refer to Fig. 4, described decoding module 3 is translated into the digital signal of NRZ code for the digital signal of the CMI code passed after shaping by optical signal receiving module 1, it comprises high-low-position separation circuit 31 and decoding operation circuit 32, described high-low-position separation circuit 31 is for being separated the high-low-position of the CMI received code, and described decoding operation circuit 32 is for carrying out same or computing to the high-low-position after described CMI code separation.
Described high-low-position separation circuit 32 is provided with some d type flip flops, and described d type flip flop is provided with data input pin D, input end of clock CLK, anti-phase set end SD and data output end Q.The CMI code of input is latched by each d type flip flop under the effect of clock CP.When clock CP negative edge reaches (now the mid point moment of corresponding first CMI code), become rising edge through phase inverter, d type flip flop exports the value of first CMI code this moment, and is in preservation state, realizes the latch to first CMI code value.Through a CMI symbol width time, the rising edge of clock CP arrives (now corresponding second CMI code mid point moment), and d type flip flop exports deputy CMI code value, meanwhile, first CMI code be latched enters second d type flip flop, thus realizes the separation of two CMI codes.
Described decoding operation circuit 32 comprises an XOR gate and a d type flip flop, and wherein, first, second CMI code that XOR gate connects code bit separation circuit respectively exports, and NRZ is that decoding exports.From CMI decoding principle, if first, second position of CMI code is carried out with or computing, must the NRZ code of its correspondence, so anti-phase computing is first done through XOR gate in first, second position of CMI code by the present embodiment again, obtain decoding and export.
Described microprocessor module 4 for being decrypted the NRZ code digital signal received, and controlling described electric control lock main body 5 and opens or close.Described microprocessor module 4 is provided with microprocessor, and described microprocessor can be single-chip microcomputer, FPGA or DSP.In the present embodiment, described microprocessor is single-chip microcomputer.Described electric control lock main body 5 comprises the parts such as relay, motor and the dead bolt that is connected with motor-driven, and it is prior art, does not repeat them here.
The light-operated door lock of the present invention is by being provided with described decoding module 3, described decoding module 3 is translated into the digital signal of NRZ code for digital signal optical signal receiving module 1 being passed the CMI code of coming, thus the present invention can match with the photon key of transmission CMI coded signal, described CMI code has the following advantages: (1) does not exist DC component, and low frequency component is less; (2) there is very strong clock-pulse component in information code current, be convenient to extract clock information from signal; (3) there is certain error correcting capability.Thus, the bit error rate of Signal transmissions can be reduced.
In sum, the light-operated door lock of the present invention is by being provided with described Fresnel light condensing lens structure 7 in the side of described optical signal receiving module 1, the light signal that photon key launches can focus on described optical signal receiving module 1 by described Fresnel light condensing lens structure 7, thus described optical signal receiving module 1 is made can to receive stronger light signal, be not easy to make light-operated door lock produce erroneous judgement, improve light signal receptivity
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect; also can make a lot of form; such as; described photodiode 11 is PIN photodiode 11, described signal amplifier 12 be logarithmic amplifier etc. these all belong within protection of the present invention.
Claims (9)
1. the light-operated door lock that signal receiving performance is good, it comprises optical signal receiving module, microprocessor module and electric control lock main body, and the light signal that described optical signal receiving module is used for photon key to launch converts electric signal to; Described microprocessor module is used for controlling described electric control lock main body according to described electric signal and opens or close; It is characterized in that: the side of described optical signal receiving module is provided with Fresnel light condensing lens structure; described Fresnel light condensing lens structure focuses on described optical signal receiving module for light signal photon key launched; described optical signal receiving module side is provided with fender; described fender is provided with the light hole for penetrating described light signal, and described Fresnel light condensing lens vibrational power flow is on described light hole.
2. the light-operated door lock that signal receiving performance according to claim 1 is good, is characterized in that: described optical signal receiving module comprises photodiode, and described Fresnel light condensing lens structure is used for light receiving surface place light signal light being focused on photoelectric diode.
3. the light-operated door lock that signal receiving performance according to claim 1 is good, it is characterized in that: described light-operated door lock also comprises decoding module, described decoding module is translated into the digital signal of NRZ code for digital signal optical signal receiving module being passed the CMI code of coming.
4. the light-operated door lock that signal receiving performance according to claim 3 is good, it is characterized in that: described decoding module comprises high-low-position separation circuit and decoding operation circuit, described high-low-position separation circuit is used for the high-low-position of the CMI code received to be separated, and described decoding operation circuit is used for the high-low-position after to described CMI code separation and carries out same or computing.
5. the light-operated door lock that signal receiving performance according to claim 3 is good, it is characterized in that: described light-operated door lock also comprises balanced Shaping Module, the signal that described balanced Shaping Module is used for optical signal receiving module exports carries out elimination intersymbol interference and corrects pulse waveform.
6. the light-operated door lock that signal receiving performance according to claim 5 is good, it is characterized in that: described balanced Shaping Module comprises the operational amplifier and comparer that are electrically connected to each other, the input end of described operational amplifier and an input end of described comparer are all electrically connected with the output terminal of described optical signal receiving module, and the output terminal of described comparer is electrically connected with described decoding module.
7. the light-operated door lock that signal receiving performance according to claim 1 is good, it is characterized in that: described optical signal receiving module comprises photodiode, signal amplifier and bandpass filter, described photodiode and described bandpass filter are electrically connected with described signal amplifier respectively.
8. the light-operated door lock that signal receiving performance according to claim 7 is good, is characterized in that: described photodiode is PIN photodiode or avalanche photodide.
9. the light-operated door lock that signal receiving performance according to claim 7 is good, is characterized in that: described signal amplifier is logarithmic amplifier or trans-impedance amplifier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210220539.9A CN102760315B (en) | 2012-06-29 | 2012-06-29 | Light control door lock with good signal receiving performance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210220539.9A CN102760315B (en) | 2012-06-29 | 2012-06-29 | Light control door lock with good signal receiving performance |
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| CN102760315A CN102760315A (en) | 2012-10-31 |
| CN102760315B true CN102760315B (en) | 2015-06-17 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103793987A (en) * | 2014-02-26 | 2014-05-14 | 东南大学 | Remote control lock based on visible light communication technology |
| CN107293005B (en) * | 2017-05-23 | 2019-12-03 | 广东安居宝数码科技股份有限公司 | Visible light gate inhibition filtering apparatus, reception device, device and system |
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| CN201964636U (en) * | 2010-12-23 | 2011-09-07 | 东莞市天尚太阳能有限公司 | Concentrating type flat-plate solar collector |
| CN202108336U (en) * | 2011-05-06 | 2012-01-11 | 武瑞琪 | Photoelectric combination lock system |
| CN202209633U (en) * | 2011-08-03 | 2012-05-02 | 昌祐光电科技股份有限公司 | Led lamp lens structure |
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2012
- 2012-06-29 CN CN201210220539.9A patent/CN102760315B/en active Active
Patent Citations (9)
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| CN2769433Y (en) * | 2004-12-31 | 2006-04-05 | 邓德武 | Photoelectric lock |
| CN200971658Y (en) * | 2006-07-05 | 2007-11-07 | 邓德武 | Improved photoelectric lock |
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Owner name: SHENZHEN GUANGQI INTELLIGENT PHOTONICS TECHNOLOGY Free format text: FORMER OWNER: SHENZHEN KUANG-CHI INNOVATION TECHNOLOGY CO., LTD. Effective date: 20150702 |
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Effective date of registration: 20240717 Address after: Building 4, 1st Floor, Foshan Military Civilian Integration Industrial Park, No. 68 Defu Road, Xingtan Town, Shunde District, Foshan City, Guangdong Province, 528300 Patentee after: Foshan Shunde Guangqi Advanced Equipment Co.,Ltd. Country or region after: China Address before: 518000 Guangdong, Shenzhen, Futian District, Shennan Road and colored field road intersection C East Block New World Plaza 2007-27 Patentee before: KUANG-CHI INTELLIGENT PHOTONIC TECHNOLOGY Ltd. Country or region before: China |