CN108877007A - A kind of bio-identification intelligent door lock - Google Patents

Abstract

The invention discloses a kind of bio-identification intelligent door locks, including Intelligent lock body and falling detection device, Intelligent lock body and falling detection device realize the mutual transmission of data by gateway, only when falling detection device detects tumble, the temporal aspect code being set in advance in falling detection device is just sent to by Intelligent lock body by gateway, at the appointed time, the Intelligent lock body could be opened by the temporal aspect code.Temporal aspect code can be arranged in the present invention in falling detection device in advance, and the temporal aspect code is informed to the people of neighbours or trust, due to only after the temporal aspect code is sent to Intelligent lock body, just now opening Intelligent lock body can be carried out with the temporal aspect code, therefore, temporal aspect code is informed that other people will not have security risk in advance.It falls when falling detection device detects, preset temporal aspect code can be sent to Intelligent lock body automatically, without doing any operation, even if old man remains unconscious, the people that will not be influenced outdoors opens the door.

Description

A biometric smart door lock

technical field

The invention belongs to the field of intelligent door locks, in particular to a biological identification intelligent door lock.

Background technique

With the development of society, the demographic dividend is gradually disappearing, the problem of population aging is becoming more and more prominent, coupled with the faster and faster pace of life, how to take care of the elderly has become a concern of all sectors of society. In addition, the phenomenon of "empty nest elderly" has become a social problem of population aging, which has aroused great concern from all walks of life.

The elderly tend to forget their keys due to poor memory. Although the existing smart door control system eliminates the problem of carrying keys, most of the existing smart door control systems install fingerprints, passwords and other identification modules on the door locks. Conduct security monitoring. However, due to reasons such as poor memory and shallow fingerprints of the elderly, existing fingerprint and password-identified smart locks are not suitable for the elderly. For the elderly living alone, because their children are not around, when a fall accident occurs at home and they cannot move, people outside cannot open the door lock at all, and can only open it by damaging the lock. If the password provided directly is informed to relatives or friends, such relatives and friends can open the door lock at any time, but there is a potential safety hazard. In order to solve the problem of direct notification of passwords and potential safety hazards, smart door locks that send temporary passwords through mobile phones have appeared, and inform the outsiders of the passwords, so that people outside the door can use the temporary passwords to open the door within a specified time. Lock. However, when the door lock realizes the above functions, the mobile phone needs to be operated to generate a temporary password, and then the people outside the door are notified by phone. And when the old man fell seriously and became unconscious, the old man could not perform the above operations, and people outside the door still could not enter the door.

Contents of the invention

In order to solve the above problems, the present invention provides a biometric smart door lock, and the technical scheme adopted in the present invention is as follows:

A biometric smart door lock, including a smart lock body and a fall detection device, the smart lock body and the fall detection device realize mutual data transmission through a gateway, and only when the fall detection device detects that a fall occurs, the gateway will pre-register The temporary feature code set in the fall detection device is sent to the smart lock body, and the smart lock body can only be opened by the temporary feature code within a specified time.

The temporary feature code can be set in the fall detection device in advance, and the neighbor or trusted person can be informed of the temporary feature code, because the temporary feature code can only be used to open the smart lock after the temporary feature code is sent to the smart lock body Therefore, there is no security risk in informing others of the temporary signature in advance. The fall detection device will automatically detect whether a fall has occurred. If a fall is detected, it will automatically send the preset temporary feature code to the smart lock body without any operation. Even if the elderly is unconscious, it will not affect the people outside the door open the door.

As a preferred embodiment of a biometric smart door lock of the present invention, the smart lock body includes:

Electronic locks;

main control board;

The storage module is used to store the pre-entered exclusive feature code;

The biometric identification module is used to obtain and identify the biometric value, compare the identified biometric value with the exclusive characteristic code, and if it matches, the main control board will control the electronic lock to open; if it does not match, it will not open;

The information receiving and sending module is used to receive the temporary feature code sent by the fall detection device through the gateway;

The temporary feature code input module is used to input the temporary feature code, and compares the input temporary feature code with the temporary feature code received by the information receiving and sending module. If it matches, the main control board will control the electronic lock to open; if it does not match, it will not open .

As another preference of the biometric smart door lock of the present invention, the biometric module is a palm vein recognition module, and the distribution map of the palm and the back of the hand is obtained by an infrared CCD camera, based on the gray scale co-occurrence matrix and the local binary pattern. Two texture methods extract biometric values from the palm vein distribution map according to a dedicated comparison algorithm.

Palm veins will not disappear or weaken with age, and palm vein recognition is fast and sensitive.

As another preference of the biometric smart door lock of the present invention, the specific method for the palm vein recognition module to obtain and recognize the biometric value includes the following steps:

(1) The infrared light of the infrared CCD camera is on the front of the palm, emits infrared light, and projects the palm. On the other side of the palm, the camera captures the palm vein image, extracts the circular area as the ROI area, and completes the palm vein scanning;

(2) Use the image sharpening and enhancement in the spatial domain to highlight the corner features of the palm veins, adjust the position and angle of the image to make it meet specific specifications, and complete the image verification;

(3) According to the image obtained above, provide the palm vein distribution image, based on the AGAST feature extraction and BRIEF description recognition algorithm, match the offset distance of the feature point pair to eliminate the mismatch, reduce the number of unmatched point pairs, get the feature map, and complete Feature value extraction;

(4) Calculate the correlation between the feature map obtained above and the exclusive feature code. If it matches, it will be passed, and if it does not match, it will be rejected, and the image comparison and matching will be completed.

As another preference of the biometric smart door lock of the present invention, the fall detection device includes an acceleration sensor, and the acceleration sensor is used to obtain acceleration values and angular velocity values to determine whether a fall occurs.

As another preference of the biometric smart door lock of the present invention, the fall detection device is a smart bracelet, the acceleration sensor is arranged inside the smart bracelet, and the smart bracelet also includes a GPRS module, the GPRS The module is used for sending the fall information to the specified terminal when the fall is recognized.

An acceleration sensor is an electronic device that can measure acceleration force. By measuring the acceleration caused by gravity, the tilt angle of the device relative to the horizontal plane can be calculated. By analyzing the dynamic acceleration, the way the device moves can be analyzed. Under normal circumstances, the human body's fall behavior usually occurs in about two seconds. During the fall process, the instantaneous movement of the body's center of gravity will generate an acceleration, and the body's toppling will also generate an angle that deviates from the vertical direction. In a non-falling state such as walking, the inclination angle of the human trunk from the Z axis is within a relatively safe range, but after a fall, the human body is mostly in a prone, side or supine posture, and the direction of the trunk is close to the horizontal, that is, it deviates from the vertical The angle of inclination of the orientation is close to 90 degrees. Therefore, the two characteristics of acceleration and body tilt angle are selected as the basis for distinguishing falls from other daily activities.

When a fall is detected, the fall information is sent to the designated terminal through the GPRS module, so that the user with the temporary feature code knows that the old man has fallen, and can rush to open the door in time, and send the old man to the hospital for diagnosis and treatment in time.

As another preference of the biometric smart door lock of the present invention, the gateway is a LORA gateway.

The LORA gateway is a low-power wide-area gateway based on the open source MAC layer protocol, which can provide services such as secure two-way communication, mobile communication, and static location identification, allowing smart devices to seamlessly connect and interoperate.

Description of drawings

The invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, a biometric smart door lock includes a smart lock body and a fall detection device. The smart lock body and the fall detection device realize mutual data transmission through a gateway. Only when the fall detection device detects that a fall occurs, The temporary feature code preset in the fall detection device will be sent to the smart lock body through the LORA gateway, and within the specified time, the smart lock body can be opened by the temporary feature code.

Wherein, the smart lock body includes,

Electronic locks;

main control board;

The storage module is used to store the pre-entered exclusive feature code;

The biometric identification module is used to obtain and identify the biometric value, compare the identified biometric value with the exclusive characteristic code, and if it matches, the main control board will control the electronic lock to open; if it does not match, it will not open;

The information receiving and sending module is used to receive the temporary feature code sent by the fall detection device through the LORA gateway;

The temporary feature code input module is used to input the temporary feature code, and compares the input temporary feature code with the temporary feature code received by the information receiving and sending module. If it matches, the main control board will control the electronic lock to open; if it does not match, it will not open .

Wherein, the biometric identification module is a palm vein identification module, which obtains the distribution map of palm and dorsal veins through an infrared CCD camera. Extract biometric values.

Specifically, in order to identify and open the door conveniently, the palm vein identification module can be implanted into the ring-shaped door handle.

The concrete method that described palm vein recognition module acquires and recognizes biometric value comprises the following steps:

(1) The infrared light of the infrared CCD camera is on the front of the palm, emits infrared light, and projects the palm. On the other side of the palm, the camera captures the palm vein image, extracts the circular area as the ROI area, and completes the palm vein scanning;

(2) Use the image sharpening and enhancement in the spatial domain to highlight the corner features of the palm veins, adjust the position and angle of the image to make it meet specific specifications, and complete the image verification;

(3) According to the image obtained above, provide the palm vein distribution image, based on the AGAST feature extraction and BRIEF description recognition algorithm, match the offset distance of the feature point pair to eliminate the mismatch, reduce the number of unmatched point pairs, get the feature map, and complete Feature value extraction;

(4) Calculate the correlation between the feature map obtained above and the exclusive feature code. If it matches, it will be passed, and if it does not match, it will be rejected, and the image comparison and matching will be completed.

Wherein, the fall detection device includes one or more acceleration sensors for monitoring the motion of the user and for generating corresponding signals; a module for determining a threshold according to one or more measurement results of the user's physical condition; a processor , used to analyze the signal, and compare the signal with the threshold to identify the fall; the GPRS module is used to send the fall information to the designated terminal when the fall is identified; the temporary feature code preset module is used to set the temporary feature code; the LORA transmission module, after identifying a fall, the LORA transmission module uses the LORA gateway to send the temporary feature code to the smart lock body. Specifically, the device uses an acceleration sensor to obtain acceleration values and angular velocity values to determine whether a fall occurs.

For the convenience of wearing, the fall detection device can be set as a smart bracelet.

The biometric smart door lock provided by the present invention has been introduced in detail above. The description of specific embodiments is only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (7)

1. A biometric intelligent door lock, characterized in that: comprising an intelligent lock body and a fall detection device, the intelligent lock body and the fall detection device realize the mutual transmission of data through a gateway, only when the fall detection device detects that a fall occurs, Only then will the temporary feature code preset in the fall detection device be sent to the smart lock body through the gateway, and within a specified time, the smart lock body can be opened by the temporary feature code. 2. A biometric smart door lock according to claim 1, characterized in that: the smart lock body comprises, Electronic locks; main control board; The storage module is used to store the pre-entered exclusive feature code; The biometric identification module is used to obtain and identify the biometric value, compare the identified biometric value with the exclusive characteristic code, and if it matches, the main control board will control the electronic lock to open; if it does not match, it will not open; The information receiving and sending module is used to receive the temporary feature code sent by the fall detection device through the gateway; The temporary feature code input module is used to input the temporary feature code, and compares the input temporary feature code with the temporary feature code received by the information receiving and sending module. If it matches, the main control board will control the electronic lock to open; if it does not match, it will not open . 3. A biometric intelligent door lock according to claim 2, characterized in that: the biometric module is a palm vein recognition module, and the distribution map of the palm and the back of the hand is obtained by an infrared CCD camera, based on the gray scale co-occurrence matrix The biometric values are extracted from the palm vein distribution map according to a special contrast algorithm. 4. A kind of biometric intelligent door lock according to claim 3, characterized in that: the specific method for obtaining and identifying the biometric value by the palm vein recognition module comprises the following steps: (1) The infrared light of the infrared CCD camera is on the front of the palm, emits infrared light, and projects the palm. On the other side of the palm, the camera captures the palm vein image, extracts the circular area as the ROI area, and completes the palm vein scanning; (2) Use the image sharpening and enhancement in the spatial domain to highlight the corner features of the palm veins, adjust the position and angle of the image to make it meet specific specifications, and complete the image verification; (3) According to the image obtained above, provide the palm vein distribution image, based on the AGAST feature extraction and BRIEF description recognition algorithm, match the offset distance of the feature point pair to eliminate the mismatch, reduce the number of unmatched point pairs, get the feature map, and complete Feature value extraction; (4) Calculate the correlation between the feature map obtained above and the exclusive feature code. If it matches, it will be passed, and if it does not match, it will be rejected, and the image comparison and matching will be completed. 5 . The biometric smart door lock according to claim 1 , wherein the fall detection device includes an acceleration sensor, and the acceleration value and the angular velocity value are acquired by the acceleration sensor to determine whether a fall occurs. 6 . 6. A biometric smart door lock according to claim 5, characterized in that: the fall detection device is a smart bracelet, the acceleration sensor is arranged inside the smart bracelet, and the smart bracelet also includes a GPRS The module, the GPRS module, is used to send the fall information to the designated terminal when the fall is recognized. 7. A biometric smart door lock according to any one of claims 1-6, characterized in that: the gateway is a LORA gateway.