CN211149538U - Visible light communication intelligent safety door lock system based on mobile phone and FPGA - Google Patents
Visible light communication intelligent safety door lock system based on mobile phone and FPGA Download PDFInfo
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- CN211149538U CN211149538U CN202020203105.8U CN202020203105U CN211149538U CN 211149538 U CN211149538 U CN 211149538U CN 202020203105 U CN202020203105 U CN 202020203105U CN 211149538 U CN211149538 U CN 211149538U
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Abstract
A visible light communication intelligent safety door lock system based on a mobile phone and an FPGA comprises a voice acquisition/storage module, a voice password sequence modulation module, a key master controller module, a visible light signal modulation module, a visible light signal L ED lamp transmitting module, a visible light receiving module, an FPGA embedded system, a relay module and an electromagnetic lock, wherein the modules are sequentially connected, the problems that the password of the existing intelligent lock is easy to intercept and crack, the electromagnetic interference resistance is poor, and the biological recognition technology has leaks and potential safety hazards are solved.
Description
Technical Field
The utility model belongs to the technical field of intelligence entrance guard, especially, relate to the biological identification visible light communication intelligent security lock system that pronunciation encrypted.
Background
Along with the progress of the internet of things, the science and technology of computers, intelligent equipment and artificial AI intelligence is rapidly developed and popularized, the traditional lock is continuously replaced by the intelligent lock, and the intelligent home gradually enters the life of people. Various biometric technologies such as fingerprint recognition, palm print recognition, face recognition, voice recognition, iris recognition, vein recognition, etc. have been developed, and various biometric products have been produced accordingly. The application of the biological identification products to the door lock is more and more, but the existing intelligent lock has imperfect biological identification technology, frequent potential safety hazards and poor security protection effect due to loopholes. The high cost of iris recognition and vein recognition in biometric identification increases the threshold of using biometric locks. The intelligent door lock industry is opened by Tesla 'small black boxes' by shaking with strong electromagnetic interference, so that the intelligent door lock is extremely harmful and impossible to prevent. The intelligent lock is used as a first line of defense line for home security, brings scientific and technological convenience to people, and brings a series of problems about the functional characteristics, the operation stability, the safety coefficient and the like of the intelligent lock. For example, the anti-electromagnetic interference performance is poor, real-time biological identification is mistakenly and frequently carried out, passwords are easy to intercept and crack, the communication bandwidth is limited, the scene linkage is insufficient, and the key is not convenient to carry.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an intelligent security lock system based on cell-phone and FPGA eliminates the very big potential safety hazard that current intelligent lock mode of unblanking exists, convenient to carry.
In order to realize the purpose of the utility model, the utility model provides a visible light communication intelligent security lock system based on cell-phone and FPGA, its characterized in that includes integrated visible light communication lock key and the visible light communication lock tool to lock two parts on the cell-phone, the visible light communication lock key includes pronunciation collection/storage module, pronunciation password sequence modulation module, key total controller module, visible light signal modulation module, visible light signal L ED lamp emission module, the visible light communication lock tool to lock includes the visible light receiving module, the embedded system of FPGA, relay module and the electromagnetic lock that connect gradually, wherein:
the voice acquisition/storage module is connected with the voice code sequence modulation module and is used for inputting the acquired voice signal to the voice code sequence modulation module;
the voice code sequence modulation module is connected with the key master controller module and is used for modulating the voice code sequence and transmitting the voice code sequence to the key master controller module;
the key master controller module is connected with the visible light signal modulation module and is used for taking all the voice password sequences as a master key, randomly extracting a section of voice password sequence from the master key as a sub-key and transmitting the extracted voice password key sequence to the visible light signal modulation module;
the visible light signal modulation module is connected with the visible light signal L ED lamp emission module, modulates the PCM pulse code according to the configuration information, and randomly adds the voice code key sequence into the PCM pulse code to generate an encrypted signal;
the visible light signal L ED lamp emission module receives the encrypted signal generated by the visible light signal modulation module, converts the PCM pulse code of the voice code key sequence into a corresponding current signal, drives the light emitting diode chip to emit visible light carrying voice codes, and the frequency of the emitted visible light signal changes along with the amplitude change of the current signal;
the visible light communication door lock key is provided with a mobile phone screen key voice input switch/reset button and a mobile phone screen key L ED lamp switch/reset button which are used as interface devices for man-machine interaction, the mobile phone screen key voice input switch/reset button controls the voice acquisition/storage module to be opened, closed or reset through a key master controller module, and the mobile phone screen key L ED lamp switch/reset button controls the visible light signal L ED lamp emission module to be opened, closed or reset through the key master controller module;
the visible light communication door lock key is integrated on a mobile phone, and a man-machine interaction page of a mobile phone screen, a mobile phone power supply, a microphone, a processor and an L ED flash lamp are used as functional modules;
the visible light receiving module is used for receiving visible light signals of voice passwords carried by a visible light signal L ED lamp emitting module, converting the visible light signals into current or voltage signals through a photodiode according to high-frequency flickering light with different rates emitted by a visible light signal L ED lamp emitting module, inputting the current or voltage signals into an AD acquisition module of an FPGA embedded system for signal acquisition and quantization, and converting analog signals into digital signals;
the FPGA embedded system is used for inputting a received current or voltage signal into an AD acquisition module of the system for signal acquisition and demodulation, transmitting the demodulated signal into an SOPC voice recognition system of FPGANios II for voice password verification, comparing and successfully recognizing a high-potential control relay module of an unlocking signal output by the FPGA embedded system, and outputting continuous current by the relay to enable the electric magnetic block to work to open the electromagnetic lock.
The FPGA embedded system is integrally designed based on an FPGA development platform, a visible light communication voice recognition technology is combined with an Nios II-based SOPC voice recognition technology, an Nios II soft core is integrated in the FPGA, and the design of voice preprocessing, voice signal password endpoint detection, FFT (fast Fourier transform), DCT (discrete cosine transform) and ME L triangular filtering functions is realized by utilizing the abundant hardware combination of a Cyclone II chip in the system design.
The speech decryption and identification of the FPGA embedded system are realized by normalizing demodulated speech data, carrying out high-pass filtering and framing, removing end-to-end silence and noise to obtain effective speech frames, and then comparing the effective speech frames with the speech frames of the user characteristics stored in the SD card.
The utility model has the advantages that:
(1) the utility model provides a current intelligent lock password easily be intercepted and cracked, anti-electromagnetic interference is poor, there is the problem of leak and potential safety hazard in biological identification technique, key convenient to carry unblanks. The core advantages of green and environment-friendly visible light communication, strong electromagnetic interference resistance and infinite bandwidth object interconnection are utilized, and the biological recognition technology of voice communication encryption is added, so that a novel visible light communication intelligent safety door lock scheme is provided.
(2) The utility model discloses with the key integration of visible light communication intelligent security lock on the smart mobile phone, for the user has solved the inconvenient problem of key carrying, also solved the problem that current biological identification technique can't open the door because of the biological characteristic changes simultaneously, compensatied biological identification "residual information and copied" technical leak. Unlocking by visible light signals, and cracking by strong electromagnetic interference of a small feast black box; the unique voice characteristic random sequence encryption ensures that the unlocking password is extremely difficult to crack; the SOPC voice feature recognition algorithm of the FPGA improves the recognition accuracy rate while performing fast operation.
Drawings
FIG. 1 is a schematic structural diagram of a visible light communication intelligent safety door lock system;
fig. 2 is a frame schematic diagram of a specific embodiment of a visible light communication intelligent security door lock system.
Detailed Description
The present invention will be further described with reference to the accompanying drawings
As shown in figure 1, the visible light communication intelligent safety door lock system comprises a key and a lock, wherein the visible light communication door lock key comprises a voice acquisition/storage module, a voice code sequence modulation module, a key master controller module, a visible light signal modulation module and a visible light signal L ED lamp emission module, the visible light communication door lock comprises a visible light receiving module, an FPGA embedded system, a relay module and an electromagnetic lock which are sequentially connected, and the visible light communication door lock system comprises:
the voice acquisition/storage module is connected with the voice password sequence modulation module and is used for inputting the acquired voice signals to the voice password sequence modulation module.
The voice password sequence modulation module is connected with the key master controller module and is used for modulating the voice password sequence and transmitting the modulated voice password sequence to the key master controller module.
The key master controller module is connected with the visible light signal modulation module and is used for taking all the voice password sequences as a master key, randomly extracting a section of voice password sequence from the master key as a sub-key and transmitting the extracted voice password key sequence to the visible light signal modulation module.
The visible light signal modulation module is connected with the visible light signal L ED lamp emission module, modulates the PCM pulse code according to the configuration information, and randomly adds the voice code key sequence into the PCM pulse code to generate an encrypted signal.
The visible light signal L ED lamp emission module receives the encrypted signal generated by the visible light signal modulation module, converts the PCM pulse code of the voice code key sequence into a corresponding current signal, drives the light emitting diode chip to emit visible light carrying voice codes, and the frequency of the emitted visible light signal changes along with the amplitude change of the current signal.
The visible light communication door lock key is provided with a mobile phone screen key voice input switch/reset button and a mobile phone screen key L ED lamp switch/reset button which are used as interface devices for man-machine interaction, the key master controller module is respectively connected with the mobile phone screen key voice input switch/reset button and the mobile phone screen key L ED lamp switch/reset button, the mobile phone screen key voice input switch/reset button sends an opening, closing or resetting permission request to a voice acquisition/storage module to the key master controller module, the key master controller module receives the request, an execution signal is returned to the mobile phone screen key voice input switch/reset button after data processing is completed, the mobile phone screen key L ED lamp switch/reset button sends an opening, closing or resetting permission request to a visible light signal L ED lamp transmitting module to the key master controller module, the key controller module receives the request, and the execution signal is returned to the mobile phone screen key L ED lamp switch/reset button after data processing is completed.
Visible light receiving module connects visible light signal L ED lamp emission module for the visible light signal that visible light signal L ED lamp emission module carried the pronunciation password, high stroboscopic light of different rates that sends according to visible light signal L ED lamp emission module, the light signal that will open and represent 1, close and represent 0 passes through photodiode, convert visible light signal to electric current or voltage signal, the AD acquisition module of inputing FPGA embedded system carries out signal acquisition and quantization, analog signal converts into digital signal.
The FPGA embedded system is connected with the visible light receiving module and used for inputting received current or voltage signals into the AD acquisition module of the system for signal acquisition and demodulation, the demodulated signals are transmitted into the SOPC voice recognition system of the FPGA Nios II for voice password verification, after the comparison and the recognition are successful, the FPGA embedded system outputs the high potential of an unlocking signal to the control relay module, and the relay outputs continuous current to enable the electric magnetic block to work to open the electromagnetic lock.
The FPGA embedded system is integrally designed based on an FPGA development platform, and an SOPC voice recognition technology based on Nios II is adopted. The Nios II soft core is integrated in the FPGA, the FPGA has extremely high parallel operation speed, high-speed data operation is provided for the system, rich hardware multipliers of a Cyclone II chip are fully utilized in design, and hardware design modules such as an endpoint detection module of a voice signal, an FFT (fast Fourier transform) module, a DCT (discrete cosine transform) module and the like are realized. The response speed of the lockset is improved, and meanwhile, the unique safety identification performance of the lockset is also improved.
The algorithm for the speech decryption and recognition of the FPGA embedded system is to normalize the demodulated speech data, high-pass filter and frame, remove the silence and noise at the head and the tail to obtain effective speech frames, and then compare the effective speech frames with the speech frames of the user characteristics stored in the SD Card.
The voice acquisition/storage module is a microphone, an Audio Interface (Audio Interface) and a mobile phone Memory card (Memory card).
The mobile phone screen key voice input switch/reset button and the mobile phone screen key L ED lamp switch/reset button are screen interfaces for human-computer interaction of writing application programs.
And the voice code sequence modulation module is responsible for processing audio information for the audio codec.
The key master controller module is a digital baseband chip set DigitalBaseband of a mobile phone processor.
The visible light signal modulation module is a mobile phone L ED microcontroller.
The visible light signal L ED lamp emission module is an SP6686 flash L ED lamp drive.
The visible light communication intelligent lock power supply module is connected with the visible light receiving module, the FPGA embedded system, the relay module and the electromagnetic lock for supplying power.
The visible light receiving module is a photodiode.
The FPGA embedded system comprises an AD acquisition module, a WM8731 audio coding chip, an SRAM (static random access memory), a voice preprocessing module, a voice endpoint detection module, an FFT, a DCT, an ME L filter module, an Nios II processor, an RGB TFT-L CD screen, Avalon Bus (on-chip Bus of the Nios II processor system), an SD card and a UART (universal asynchronous receiver transmitter).
The relay module is a 5V relay supporting high and low level triggering.
The electromagnetic lock is a 12V normally closed gate-off electromagnetic lock.
As shown in fig. 2, the present invention discloses a visible light communication intelligent security door lock key integrated on a mobile phone, which uses a mobile phone screen, a processor, L ED flash lamp and a mobile phone power supply to realize a visible light unlocking function, when a mobile phone screen key voice input switch button is opened, a voice acquisition/storage module is opened to work, a microphone acquires user voice, the voice is input to an Audio interface mediaregister, the voice interface is responsible for converting an analog signal received from the microphone into a Digital signal, an Audio codec configures an Audio signal register to process Audio, an Audio DSP performs voice processing, removes noise and performs voice correction, after a voice without noise is obtained, performs modulation of a voice password sequence, and then forwards the voice password sequence to a key master controller, a mobile phone processor Digital Baseband chipset (Digital Baseband chipset) uses a voice password sequence as a master key, randomly extracts a voice password sequence from the voice password sequence as a sub key, transmits to a visible light signal modulation module composed of two parts of an unlocking Digital Signal Processor (SP) and a Microcontroller (Microcontroller), a PCM pulse modulation pulse coding algorithm is used to perform encryption on a visible light signal modulation module composed of a visible light signal, a flash signal encryption algorithm is changed with a frequency of a random signal encryption, and then a flash signal encryption algorithm is added as a DES < 3 > DES < 3'.
The lock comprises an AD acquisition module, a WM8731 audio coding chip, an SRAM (static random access memory), a voice preprocessing module, a voice endpoint detection module, an FFT, a DCT, an ME L filter module, a Nios II processor, an RGB TFT-L CD screen, an Avalon Bus (on-chip Bus of a Nios II processor system), an SD Card, a UART (universal asynchronous receiver transmitter) and a chargeable power supply, wherein the visible light unlocking function is realized by the AD acquisition module after a photodiode of the visible light receiving module receives a visible light signal, the AD acquisition module converts an analog signal into a digital signal, the sampled signal is converted into a 16-bit PCM (pulse code) cache by the audio coding and decoding chip WM8731 at an AD sampling rate of 8KHZ, the 16-bit PCM cache is obtained by high pass filtering, an effective log is saved into an SRAM, the voice signal is extracted according to a frame, the voice characteristic of the SRAM is obtained by unlocking voice cycle estimation, the voice data quality is improved by the voice preprocessing module, the voice endpoint detection module and the voice endpoint detection module, the power spectrum is removed by the high pass through the UART L, the FPGA is successfully identified, the audio coding data is compared with the AVoson data of an AVoson data input to a USB interface, the background, the audio coding and the audio coding data is successfully identified by the AVoson data, the AVoson data is displayed on a USB interface, the audio coding module is displayed on a USB coding module, the audio coding module, the security domain is displayed on a security domain of the security.
The use process comprises the following steps: when a user is ready to input voice into the mobile phone, the mobile phone screen key voice input switch/reset button is clicked, and the mobile phone screen key voice input switch/reset button sends an opening permission request to the key master controller module. And the key master controller module receives the request, and returns data to the mobile phone screen key voice input switch/reset button after processing. The mobile phone screen key voice input switch/reset button acquires data capable of carrying out opening authority, and the voice acquisition/storage module starts recording and storing in the mobile phone after receiving a response signal sent by the mobile phone screen key voice input switch/reset button. And after the voice acquisition and recording are finished, executing the request for closing the authority, processing the data, receiving the response and closing the execution process.
When a user takes out a mobile phone and prepares to open the door, the user clicks a mobile phone screen key L ED lamp switch/reset button, the mobile phone screen key L ED lamp switch/reset button sends an opening authority request to a key master controller module, the key master controller module receives the request and returns data to a mobile phone screen key L ED lamp switch/reset button after processing is completed, the mobile phone screen key L ED lamp switch/reset button acquires data capable of opening the authority, the visible light signal L ED lamp transmitting module starts to transmit a light and shade-converted visible light signal carrying a voice password after receiving a response signal sent by the mobile phone screen key L ED lamp switch/reset button, and after unlocking is successful and the visible light signal transmission is completed, the execution process is closed after the request of closing the authority, data processing and response are received.
Claims (9)
1. A visible light communication intelligent safety door lock system based on a mobile phone and an FPGA is characterized by comprising a visible light communication door lock key and a visible light communication door lock integrated on the mobile phone, wherein the visible light communication door lock key comprises a voice acquisition/storage module, a voice code sequence modulation module, a key master controller module, a visible light signal modulation module and a visible light signal L ED lamp emission module, and the visible light communication door lock comprises a visible light receiving module, an FPGA embedded system, a relay module and an electromagnetic lock which are sequentially connected, wherein:
the voice acquisition/storage module is connected with the voice code sequence modulation module and is used for inputting the acquired voice signal to the voice code sequence modulation module;
the voice code sequence modulation module is connected with the key master controller module and is used for modulating the voice code sequence and transmitting the voice code sequence to the key master controller module;
the key master controller module is connected with the visible light signal modulation module and is used for taking all the voice password sequences as a master key, randomly extracting a section of voice password sequence from the master key as a sub-key and transmitting the extracted voice password key sequence to the visible light signal modulation module;
the visible light signal modulation module is connected with the visible light signal L ED lamp emission module, modulates the PCM pulse code according to the configuration information, and randomly adds the voice code key sequence into the PCM pulse code to generate an encrypted signal;
the visible light signal L ED lamp emission module receives the encrypted signal generated by the visible light signal modulation module, converts the PCM pulse code of the voice code key sequence into a corresponding current signal, drives the light emitting diode chip to emit visible light carrying voice codes, and the frequency of the emitted visible light signal changes along with the amplitude change of the current signal;
the visible light communication door lock key is integrated on a mobile phone, and a human-computer interaction page of a mobile phone screen, a mobile phone power supply, a microphone, a processor and a 6335 ED flash lamp of the mobile phone screen are used as functional modules;
the visible light receiving module is used for receiving visible light signals of voice passwords carried by a visible light signal L ED lamp emitting module, converting the visible light signals into current or voltage signals through a photodiode according to high-frequency flickering light with different rates emitted by a visible light signal L ED lamp emitting module, inputting the current or voltage signals into an AD acquisition module of an FPGA embedded system for signal acquisition and quantization, and converting analog signals into digital signals;
the FPGA embedded system is used for inputting a received current or voltage signal into an AD acquisition module of the system for signal acquisition and demodulation, transmitting the demodulated signal into an SOPC voice recognition system of an FPGA Nios II for voice password verification, comparing and successfully recognizing a high-potential control relay module of an unlocking signal output by the FPGA embedded system, and outputting continuous current by the relay to enable the electric magnetic block to work to open the electromagnetic lock.
2. The visible light communication intelligent safety door lock system based on the mobile phone and the FPGA as claimed in claim 1, wherein the FPGA embedded system is integrally designed based on an FPGA development platform, a visible light communication voice recognition technology is combined on the SOPC voice recognition technology based on Nios II, a Nios II soft core is integrated in the FPGA, and rich hardware combinations of a Cyclone II chip are utilized in the system design to realize the functions of voice preprocessing, voice signal password endpoint detection, FFT fast Fourier transform, DCT discrete cosine transform and ME L triangular filtering.
3. The visible light communication intelligent safety door lock system based on the mobile phone and the FPGA according to claim 1, characterized in that: and the voice code sequence modulation module is responsible for processing audio information for the audio codec.
4. The visible light communication intelligent safety door lock system based on the mobile phone and the FPGA according to claim 1, characterized in that: the key master controller module is a Digital Baseband chipset of a mobile phone processor.
5. The visible light communication intelligent safety door lock system based on the mobile phone and the FPGA as claimed in claim 1, wherein the visible light signal modulation module is a mobile phone L ED microcontroller.
6. The visible light communication intelligent safety door lock system based on the mobile phone and the FPGA as claimed in claim 1, wherein the visible light signal L ED lamp emitting module is driven by an SP6686 flash L ED lamp.
7. The visible light communication intelligent safety door lock system based on the mobile phone and the FPGA according to claim 1, characterized in that: the visible light receiving module is a photodiode.
8. The visible light communication intelligent safety door lock system based on the mobile phone and the FPGA according to claim 1, characterized in that: the relay module is a 5V relay supporting high and low level triggering.
9. The visible light communication intelligent safety door lock system based on the mobile phone and the FPGA according to claim 1, characterized in that: the electromagnetic lock is a 12V normally closed gate-off electromagnetic lock.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112804000A (en) * | 2021-01-06 | 2021-05-14 | 天津戎行集团有限公司 | LED visible light communication device used in hole or underground tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112804000A (en) * | 2021-01-06 | 2021-05-14 | 天津戎行集团有限公司 | LED visible light communication device used in hole or underground tunnel |
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