CN211124184U

CN211124184U - Embedded access control system

Info

Publication number: CN211124184U
Application number: CN202020348095.7U
Authority: CN
Inventors: 丁守廉; 李天建; 陈义
Original assignee: Fujian University of Technology
Current assignee: Fujian University of Technology
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-07-28
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses an embedded access control system, which comprises an electromagnetic door lock and a relay connected with the electromagnetic door lock; further comprising: the camera is used for acquiring a face image and a real-time scene of a monitoring area and generating face recognition data and monitoring scene data; the information input module is used for inputting pre-stored information and inputting an unlocking key; the infrared detector is used for detecting the biological temperature characteristics of the detection area and generating biological characteristic data; the server is used for receiving and storing the face recognition data, the monitoring scene data, the prestored information, the input unlocking key and the biological temperature characteristic data, is electrically connected with the relay and outputs a high-level or low-level electric signal to the relay, and the relay controls the opening and closing of the electromagnetic door lock; the audio output module is connected with the server and is controlled by the server to output audio information.

Description

Embedded access control system

Technical Field

The utility model belongs to the technical field of the entrance guard technique and specifically relates to embedded access control system.

Background

Today, as society becomes increasingly information-oriented, the use of computers and networks has fully penetrated everyday life. The application of embedded systems is everywhere seen, for example: aerospace, automotive, medical, industrial control, etc. have large-scale applications of embedded systems.

Along with the popularization of intelligent life and intelligent home concepts in recent years, the embedded system is closer to the life of people, replaces the traditional products and becomes an important component of intelligent life. The rapid development of intelligent access control systems is typical of the intelligent access control systems. Compared with the traditional door lock, the door lock has the advantages that functions such as fingerprint identification, face identification and voice identification are added, the traditional key and the traditional password are replaced, and the unlocking is realized by using biological characteristics. The fingerprint identification is hidden, simple and efficient when having advantages. The facial features are one of the natural human recognition features, and can be recognized only by people in front of the door without redundant actions. And people can be distinguished by faces naturally, and the unification of mechanical and human recognition modes provides possibility for realizing more functions in the future.

Many of present face identification access control systems still stop logging in facial, discernment unblock simple stage, and the function is single, and the security level is low, only an isolated point in the furniture. It can be roughly summarized as follows:

1. the face recognition speed is inefficient. Due to the limitation of cost control and development period, the hardware of face recognition is relatively backward, and although the recognition requirement can be met, the speed is not high, and the addition of a neural network is lacked. And the recognition algorithm is relatively backward, and the situation of multiple recognition often appears.

2. The access control system is closed and is not interconnected with other equipment through a network, so that the functions of remote reminding, control, information checking and the like are lacked.

3. For example, high-frequency pulses generated by a Tesla coil easily cause the system to crash and restart, and the system generally defaults to the unlocking of a door lock after restarting, so that the system is cracked, ② potential safety level is low, and the system cannot store facial data of strangers who try to unlock the door lock so as to remind a master to prevent potential danger.

4. The functionality is redundant. Many devices incorporate speech recognition or fingerprint recognition based on face recognition. These functions are used less frequently and increase much development cost, reducing investment in algorithms and interconnect.

5. The cost is high. At present, the selling price of the face recognition door lock is more than thousand yuan. More than 3000 products. Compared with the traditional door lock, the cost required by a user is increased by more than ten times.

Disclosure of Invention

To the situation of the prior art, the utility model aims to provide a mechanism is nimble, experience good and can be convenient for control and the embedded access control system that the safety protection effect is good.

In order to realize the technical purpose, the utility model adopts the technical scheme that:

an embedded access control system comprises an electromagnetic door lock and a relay connected with the electromagnetic door lock; it still includes:

the camera is used for acquiring a face image and a real-time scene of a monitoring area and respectively generating face identification data and monitoring scene data;

the information input module is used for inputting pre-stored information and inputting an unlocking key;

the infrared detector is used for detecting the biological temperature characteristics of the detection area and generating biological characteristic data;

the server is used for receiving and storing face recognition data and monitoring scene data generated by the camera, prestored information and an input unlocking key which are input by the information input module, biological temperature characteristic data generated by the infrared detector, and carrying out corresponding feedback operation according to a preset program, is also electrically connected with the relay and outputs a high-level or low-level electric signal to the relay, and controls the opening and closing of the electromagnetic door lock by the relay;

and the audio output module is connected with the server and is controlled by the server to output audio information.

As one of possible implementation manners, further, the server is a local server.

As a second possible implementation manner, the system further comprises a communication module connected to the server, and the server is in communication connection with the internet and the remote terminal through the communication module respectively and performs data interaction.

As a possible implementation manner, further, the information entry module is an input keyboard.

As a possible implementation manner, further, the audio output modules are sound boxes, which are respectively disposed indoors and outdoors.

The operation method of the embedded access control system comprises the steps that a visitor mode and a home mode are preset in a server;

the visitor mode comprises the following steps:

(1) the camera monitors a preset monitoring area in real time and feeds monitoring data back to the server;

(2) the server calls a preset program to identify images according to the monitoring data fed back by the camera;

when the fed back monitoring data has no image change, the server enters a standby dormant mode;

when the fed back monitoring data has image change, the server is awakened to enter a working mode, a face recognition program is called to perform face recognition on the monitoring data fed back by the camera, and meanwhile, an infrared detector is called to perform biological temperature characteristic scanning on biological characteristics of a detection area and generate biological characteristic data; and continuing to perform the following operations:

1. when the fitting degree of the biological characteristic data and the face recognition data reaches a preset percentage, the server outputs a high level to the relay, the relay is powered on, the electromagnetic door lock is powered off, and the door lock is opened;

2. when the fitting degree of the biological characteristic data and the face recognition data is lower than the preset percentage, the server outputs a preset prompt audio to the audio output module, the audio output module located outdoors plays the prompt audio, and meanwhile, the step (1) is returned according to a preset period;

the home mode comprises the following steps:

2. when the fitting degree of the biological characteristic data and the face recognition data is lower than the preset percentage, the server outputs preset prompt audio to the audio output module, and the audio output module located indoors plays the prompt audio.

As a possible implementation manner, further, when the mobile terminal is in the visitor mode, the server records the times that the fitting degree of the biological feature data and the face recognition data in the preset period is lower than the preset percentage, and triggers the server to send the prompt message to the remote terminal through the communication module according to the preset times.

As a possible implementation manner, in the visitor mode or the home mode, the face recognition data and the biometric data when the door lock is opened are both sent to the internet cloud end for storage through the server in the form of data packets.

As a possible implementation manner, further, the method further includes that the remote terminal transmits a one-time key to a server, and the remote terminal is a mobile phone, a PAD, a smart watch, or a notebook computer.

As a possible implementation manner, further, the server is pre-stored with pre-input face recognition data, and the face recognition data corresponds to operation authorities that are not identical.

Based on the above possible embodiments, the following cooperation effect can be achieved:

(1) can identify the function of the owner whether the owner is at home

The system reads the current position of the host mobile phone through the positioning information of the remote terminal (such as the mobile phone) to judge whether the host is at home. The master enters a home-returning mode at home: when a person visits, the voice prompt is sent indoors. The system enters guest mode when not at home: besides the indoor voice prompt, the mobile phone app can also send out the prompt to remind people of visiting.

(2) Intelligent visitor/stranger identification function

The system has the function of simultaneously identifying a plurality of faces. When the owner and the stranger are simultaneously present in the identification scene, the stranger is identified as the visitor, and the data is added into the timestamp for storage, so that the user can conveniently check the people who visit the house. The user can set the time for which these data are saved according to the size of the storage space.

(3) Visitor function

After the visitor mode is selected to be started, when the face of the visitor is detected by the camera, if the owner is not at home, the visitor image can be sent to the mobile phone app, the owner is reminded by sending a message, and the door lock system can broadcast the set visitor voice in advance. And the voice can also be set not to be played temporarily, and when the remote end of the host is set in a user-defined way, the voice playing method comprises the following steps: and the visitor is replied after the voice, such as 'you are good, the owner is not at home temporarily' and the like.

(4) Intelligent sleep function

Because the face recognition scene of the access control system is in a static state most of the time, the system is awakened when the external scene is changed by utilizing the real-time comparison of the camera to the external scene, and the rest of the time is in the dormancy time according to the system, thereby achieving the purpose of energy conservation. The function is a command line application program and a language code library, and is used for detecting scene changes in the video, so that the function of only being capable of sleeping and starting and stopping is achieved.

(5) Human body feature detection function

The camera is used for obtaining the solid geometric characteristics of the human face, and the infrared sensor is used for detecting temperature data which accord with biological characteristics. At the hardware level, the difficulty of cracking is high. The function uses the traditional detection technology and combines with a visual algorithm, a useless detection window is rapidly provided, and the efficiency is higher.

(6) End data synchronization function

And uploading the unlocking data and time and the unlocking user name to a cloud administrator account through a connection network. Meanwhile, the door lock fault can be notified in a message form, so that a user can prevent brute force from being cracked in time. When there is no network signal, the data is stored in the local database.

(7) Disposable password and remote control function

The system retains password unlocking and can provide a password-one and password-use expiration interval in the networked state. The administrator can open and close the door lock and modify the user permission at the cloud.

(8) Multi-way unlocking function

The system can realize face, password and key unlocking. Wherein the key unlock is consistent with the traditional door lock and has the highest right hardware limit. Even if the system is not in operation, the lock can still be unlocked by the key.

Adopt foretell technical scheme, compared with the prior art, the utility model, its beneficial effect who has is: the utility model discloses scheme system module retrencies, the flexible operation, and the unblock is efficient, is applicable to remote control or local servo control, in addition, combines behind the communication module, can realize remote control, makes its operational mode more humanized and intelligent, has improved reliability and convenience.

Drawings

The scheme of the invention is further explained by combining the attached drawings and the detailed embodiment:

FIG. 1 is a schematic diagram of the connection principle of the solution of the present invention;

fig. 2 is a schematic diagram of the logic principle of the operation of the present invention.

Detailed Description

As shown in fig. 1, the embedded access control system of the present invention comprises an electromagnetic door lock and a relay connected with the electromagnetic door lock; it still includes:

As a possible implementation manner, the system further comprises a communication module connected to the server, the server is in communication connection with the internet and a remote terminal through the communication module respectively, and data interaction is performed, the remote terminal can be a mobile phone, a PAD, a smart watch or a notebook computer, and an App which interacts with the server information is built in the remote terminal; if the off-line single machine is used, the server can use a local server.

In addition, in order to facilitate instruction input, as a possible implementation manner, the information entry module is further an input keyboard.

In order to distinguish the indoor and outdoor audio prompts, the audio output module can be a plurality of sound boxes which are respectively arranged indoors and outdoors.

Based on the scheme shown in fig. 1, in combination with fig. 2, the general and brief workflow of the scheme may be:

1. inputting face data and account information of a user, and keeping the system in a dormant state in standby.

2. When the camera detects the change of an external scene, the system is started, firstly, the algorithm is carried out to carry out face feature detection and infrared biological feature detection, and when the face is confirmed, the server sends an instruction to the audio output module and sends a prompt tone to prompt a user to scan the posture.

3. The camera shoots face head portrait information and feeds generated data back to the server, the characteristic points of the face and facial contour of the five sense organs are detected and identified by using an algorithm packet arranged in the server, and compared with the characteristic point data of the face of the account in the database, when the fitting degree of the characteristic points reaches a certain percentage, the system outputs high level to pins of an external relay through verification, the relay is powered on, the electromagnetic mechanism of the door lock is powered off, and the door lock is opened. And when the fitting degree does not reach the standard, the system sends a prompt without passing the verification.

4. And when the lock is unlocked, the door lock state and the unlocking account are sent to the cloud server in the form of a data packet.

Based on the above scheme, the advantages of the scheme and the implementation of the technology which can be further expanded may be as follows:

1. the application of the face recognition algorithm, a neural network is utilized to carry out a large amount of image training in the early stage, and during recognition, a face window in a picture is extracted, the detection of a face contour is carried out, geometric feature points of the face are extracted, and the similarity of the existing face features is compared;

2. the method comprises the steps of realizing intelligent classification of human faces, namely identifying the distance of relative positions by adopting a wide-angle lens in the identification of multiple human faces in the same scene, removing useless detection windows, and storing a user cut image appearing in the same scene with a host into a database one by one according to the similarity of human faces;

3. the ups power supply of the system is switched without delay, namely the ups power supply can be switched to a standby power supply within millisecond grade through a static switch during power failure, and the power supply is supplied for 12 hours, so that the situation that a door lock is opened during power failure is prevented;

4. prevent cracking-the system deals with brute force cracking-high frequency pulse cracking-external data invasion cracking-use the face model to crack.

Based on a possible implementation form of the technical expansion, as an intelligent operation method of the embedded access control system, the embedded access control system can operate in the following form:

the server is preset with a visitor mode and a home mode;

the visitor mode comprises the following steps:

the home mode comprises the following steps:

When the mobile phone is in the visitor mode, the server records the times that the fitting degree of the biological feature data and the face recognition data in a preset period is lower than a preset percentage, and triggers the server to send prompt information to the remote terminal through the communication module according to the preset times.

In addition, in the visitor mode or the home mode, the face recognition data and the biological characteristic data when the door lock is opened are sent to the internet cloud end to be stored in a data packet mode through the server.

In order to improve convenience, a remote terminal can be arranged in the server in the scheme and transmits a disposable secret key to the server, the remote terminal is a mobile phone, a PAD, a smart watch or a notebook computer, and after the disposable secret key is input through an information input module, the unlocking permission of the disposable secret key is automatically deleted by the server after a door lock is started.

In order to improve the operation authority of different people, as a possible implementation manner, further, the server is pre-stored with pre-input face recognition data, and the face recognition data correspond to operation authorities that are not identical.

The above embodiments are the embodiments of the present invention, and for those skilled in the art, according to the teaching of the present invention, the equivalent changes, modifications, replacements and variations made by the claims of the present invention should all belong to the scope of the present invention without departing from the principle and spirit of the present invention.

Claims

1. An embedded access control system comprises an electromagnetic door lock and a relay connected with the electromagnetic door lock; the method is characterized in that: it still includes:

2. The embedded access control system of claim 1, wherein: the server is a local servo server.

3. The embedded access control system of claim 1, wherein: the server is in communication connection with the internet and the remote terminal through the communication module respectively, and data interaction is achieved.

4. The embedded access control system of claim 1, wherein: the information input module is an input keyboard.

5. The embedded access control system of claim 1, wherein: the audio output module is a sound box which is provided with a plurality of sound boxes respectively arranged indoors and outdoors.