WO2020087535A1

WO2020087535A1 - Liveness recognition apparatus and door lock

Info

Publication number: WO2020087535A1
Application number: PCT/CN2018/113817
Authority: WO
Inventors: 刘致尧; 杨旺旺; 刘畅; 汪海翔
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2018-11-02
Filing date: 2018-11-02
Publication date: 2020-05-07
Also published as: CN110506299A

Abstract

A liveness recognition apparatus and a door lock. The apparatus (200) comprises an optical liveness detection module (210). The optical liveness detection module (210) comprises: a light emitting unit (211) configured to emit a first optical signal, the first optical signal being incident to a target outside the apparatus (200) and then emergent as a second optical signal; a photoelectric sensing unit (212) configured to receive the second optical signal and convert the received second optical signal into an electrical signal; a circuit module (213) electrically connected to the photoelectric sensing unit (212) and configured to determine, according to the electrical signal, whether the target is a living body; and a light shielding structure (214) configured to isolate the light emitting unit (211) and the photoelectric sensing unit (212).

Description

Living body identification device and door lock

Technical field

The embodiments of the present application relate to the technical field of smart door locks, and more specifically, to a device for living body identification and a door lock.

Background technique

In the current smart door lock, for example, on the inner door, no safety protection device is provided. In this case, after breaking the cat's eye outside the door, the intruder reached into the wire hook to open the inner door handle, so that he could break into the door.

Therefore, how to improve the performance of the inner door lock has become an urgent technical problem to be solved.

Summary of the invention

The embodiments of the present application provide a living body identification device and a door lock, which can improve the performance of an inner door door lock.

In a first aspect, a device for living body identification is provided for use in a door lock. The device includes an optical living body detection module. The optical living body detection module includes: a light emitting unit for emitting; emitting first light Signal, the first optical signal enters a target outside the device and emerges as a second optical signal; a photoelectric sensor unit is used to receive the second optical signal and convert the received second optical signal It is an electrical signal; a circuit module, electrically connected to the photoelectric sensing unit, used to determine whether the target is a living body according to the electrical signal; and a light-shielding structure used to isolate the light emitting unit and the photoelectric sensing unit.

The technical solution of the embodiment of the present application adopts an optical living body detection module for living body detection. In this way, the door lock applying the technical solution of the embodiment of the present application can be unlocked when a living body is detected, which can reduce costs and ensure safety, thereby Can improve the performance of the inner door lock.

In some possible implementations, the device further includes: a target detection module, configured to detect whether the target appears outside the device.

In some possible implementations, the target detection module is used to output a target indication signal when the target is detected outside the device, and the target indication signal is used to turn on the optical living body detection module.

In some possible implementation manners, the circuit module is used to output a living body indication signal when it is determined that the target is a living body, and the living body indication signal is used to open the door lock.

The target detection module has low power consumption and can be in a normally open state. The optical living detection module is only turned on when a target (such as a finger) appears, which can reduce power consumption of the device.

In some possible implementations, the circuit module is electrically connected to the light emitting unit, and is used to control the light emitting unit to be turned on and off.

In some possible implementation manners, the optical living body detection module further includes: a bracket for accommodating the light emitting unit, the photoelectric sensing unit, and the circuit module.

In some possible implementations, the material of the bracket is a light-transmitting material.

In some possible implementations, the light emitting unit, the photoelectric sensing unit, and the circuit module are packaged in one chip.

In some possible implementations, the light-shielding structure includes a first light-shielding member disposed between the light emitting unit and the photoelectric sensing unit.

In some possible implementation manners, the light-shielding structure further includes a second light-shielding member disposed on the periphery of the chip.

In some possible implementations, the light-shielding structure further includes an opaque layer disposed on the inner surface of the bracket and located in an area above the first light-shielding member.

In some possible implementations, the opaque layer is an ink layer.

In some possible implementations, the light-shielding structure further includes a blocking wall disposed above the first light-shielding member.

In some possible implementations, the retaining wall penetrates the support.

In some possible implementation manners, the chip further includes: a substrate, wherein the light emitting unit, the photoelectric sensing unit, and the circuit module are disposed on the substrate; and a encapsulating filler material is used to encapsulate the chip .

In some possible implementations, the height of the encapsulation filling material is the same as that of the first shading member.

In some possible implementations, the packaging filler material is a light-transmitting material.

In some possible implementations, the light emitting unit, the photoelectric sensing unit, and the circuit module are discrete devices.

In some possible implementations, the light-shielding structure includes a blocking wall disposed between the light emitting unit and the photoelectric sensing unit.

In some possible implementations, the retaining wall is integrally formed with the bracket or is a discrete device.

In some possible implementations, the retaining wall penetrates the space from the upper surface of the bracket to the bottom of the light emitting unit and the photoelectric sensing unit.

In some possible implementation manners, the optical living body detection module further includes: an appearance piece disposed above the bracket, and a color layer is provided on an inner surface of the appearance piece.

In some possible implementation manners, the optical living body detection module further includes: a protective layer disposed above the support.

In some possible implementation manners, the number of the light emitting unit and the photoelectric sensing unit are both one or more.

In some possible implementations, the target detection module includes: a metal ring that surrounds the optical living body detection module; an electrode that is disposed below the metal ring and is electrically connected to the metal ring, wherein the pair of electrodes The change in capacitance of the system ground is used to determine whether the target appears outside the device.

In some possible implementations, the target detection module includes: a tact switch, which is disposed below the optical living body detection module, wherein the state change of the tact switch is used to determine whether an object occurs outside the device述结果。 The goal.

In some possible implementations, the target detection module includes: a first magnet disposed on the handle of the door lock; a second magnet disposed on the lock body of the door lock; a Hall effect switch, wherein The state change of the Hall effect switch is used to determine whether the target appears outside the device.

In some possible implementations, the target detection module includes a temperature sensor, wherein the temperature detected by the temperature sensor is used to determine whether the target appears outside the device.

According to a second aspect, a door lock is provided, including: the device for living body identification in the first aspect or any possible implementation manner of the first aspect.

In some possible implementation manners, the door lock further includes: a processor, configured to turn on the optical living body detection module of the device according to a target indication signal output by the target detection module of the device, and detect according to the optical living body The living body indication signal output by the module opens the door lock.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of an application scenario of the technical solution of the embodiment of the present application.

2 is a schematic block diagram of an apparatus for living body recognition according to an embodiment of the present application.

FIG. 3 is a schematic diagram of circuit connections in an optical living body detection module according to an embodiment of the present application.

4 is a schematic diagram of a circuit module according to an embodiment of the present application.

FIG. 5 is a schematic block diagram of a living body recognition device according to another embodiment of the present application.

6 is a system architecture diagram of an embodiment of the present application.

7 is a processing flowchart of an embodiment of the present application.

8 is a schematic diagram of application of the technical solution of the embodiment of the present application.

9 is a schematic structural diagram of a living body recognition device according to an embodiment of the present application.

10 is a schematic diagram of a chip package according to an embodiment of the present application.

FIG. 11 is a schematic diagram of a light leakage optical path and an effective optical path of an embodiment of the present application.

12-14 are schematic structural diagrams of a living body recognition device according to another embodiment of the present application.

15 is a schematic diagram of a touch switch according to an embodiment of the present application.

16 is a schematic diagram of a target detection module according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings.

The technical solutions of the embodiments of the present application can be applied to various door locks, especially interior door locks, but the embodiments of the present application are not limited thereto.

FIG. 1 shows a schematic diagram of an application scenario of the technical solution of the embodiment of the present application.

On the inner door side of the smart door lock, no safety protection device is provided. As shown in Fig. 1, in this case, after breaking the cat's eye outside the door, the intruder reaches into the wire hook to open the inner door handle, and can break into the door.

In view of the above problems, the embodiments of the present application provide a technical solution that uses a living body identification device on the inner door side, which can not only reduce costs but also ensure safety, thereby improving the performance of the inner door lock.

FIG. 2 shows a schematic block diagram of an apparatus 200 for living body recognition according to an embodiment of the present application.

As shown in FIG. 2, the device 200 includes an optical living body detection module 210. The optical living body detection module 210 is used to perform living body detection, that is, to detect whether the target of the pressing device 200 is a living body.

It should be understood that, in the embodiments of the present application, according to different detection technologies, the above-mentioned pressing may be changed to touch, proximity, etc., which is not limited in the embodiments of the present application. For ease of description, this application is collectively referred to as pressing.

The device 200 is suitable for the inner door side, which can reduce costs.

The optical living body detection module 210 can adopt various optical living body detection technologies to perform living body detection, for example, can detect living body, heart rate, blood oxygen, blood pressure, etc., which is not limited in the embodiments of the present application.

The optical living body detection technology uses light incident on the target, and the light returned from the target performs living body recognition. The returned light carries the living body information of the target (for example, a finger), and a specific optical living body detection module can be realized by collecting and detecting the returned light.

For example, a certain wavelength of light is emitted from the light emitting diode (LED) inside the optical living body detection module and enters the skin. After reflection, scattering and absorption of the skin tissue, part of the light can exit the skin surface and be optically Received by a photodiode (PD) inside the living body detection module. During this process, since the blood volume of the subcutaneous tissue changes with the heart rhythm, the light intensity received on the PD also changes with the pulse. By converting this light intensity change signal into an electrical signal, a photoplethysmograph (PPG) wave of subcutaneous tissue blood volume that changes with pulse can be obtained, from which heart rate and blood pressure can be calculated. In addition, blood oxygen can be detected using incident light at two wavelengths.

At the same time, compared with other common substances (such as plastic, metal, wood, cloth, etc.), human skin tissue has obvious differences in light reflection, scattering and absorption characteristics when it is close to the optical living detection module, which is reflected by the internal PD receiving There is a clear difference in energy. Through this difference, it can be judged whether the substance close to the optical living body detection module is human tissue.

As shown in FIG. 2, the optical living body detection module 210 may include: a light emitting unit 211, a photoelectric sensing unit 212, a circuit module 213 and a light-shielding structure 214.

The light emitting unit 211 is configured to emit a first optical signal, and the first optical signal enters a target outside the device 200 and exits as a second optical signal.

The light emitting unit 211 is an emitting component of the optical living body detection module 210. The light emitting unit 211 may emit light of a specific wavelength (first optical signal). The light of the specific wavelength may be visible light, such as green, blue, red light, or invisible light, such as infrared light, etc. The light emitting unit 211 may be an LED, a semiconductor laser (semiconductor laser, LD), a vertical cavity surface emitting laser (vertical cavity surface emitting laser, VCSEL), or other light emitting components, which is not limited in the embodiments of the present application. The light emitting unit 211 may be in the form of a bare chip (such as a wafer) or in the form of a packaging sheet, or it may be matched with a specific optical structure, such as a condensing cup, a grating, and other structures according to requirements, which is not limited in the embodiments of the present application.

The first optical signal enters a target (e.g., finger) outside the device 200 and exits as a second optical signal. For example, after the first optical signal is incident on the skin of the finger, after being reflected, scattered, and absorbed by the skin tissue, a part of the light may be emitted from the skin surface, that is, the second optical signal.

The photoelectric sensing unit 212 is configured to receive the second optical signal and convert the received second optical signal into an electrical signal.

The photoelectric sensing unit 212 is a receiving component of the optical living body detection module 210. For example, the photoelectric sensing unit 212 may be a PD, an organic photodiode (OPD), a photoresistor, or other photoelectric conversion devices, which is not limited in the embodiments of the present application.

Optionally, the number of the light emitting unit 211 and the photoelectric sensing unit 212 may be one or more.

The circuit module 213 is electrically connected to the photoelectric sensing unit 212, and is used to determine whether the target is a living body according to the electrical signal.

Specifically, the circuit module 213 can analyze and process the electrical signal, for example, perform integration processing, amplification processing, de-common mode processing, etc., as well as different application functions for the final collected data (such as data sampled from the ADC) To conduct analysis to determine whether the target is a living body.

The circuit module 213 may output a living body indication signal when it is determined that the target is a living body, and the living body indication signal is used to open the door lock.

For example, when determining that the target is a living body, the circuit module 213 may output a living body instruction signal to the door lock processor, and the processor unlocks the door lock according to the living body instruction signal.

In addition to the analysis processing function, the circuit module 213 may also have a control function. Specifically, the circuit module 213 is also electrically connected to the light emitting unit 211, and is used to control the light emitting unit 211 to be turned on and off, that is, to drive and control the light emitting unit 211.

FIG. 3 shows a schematic diagram of circuit connections in the optical living body detection module 210 according to an embodiment of the present application.

The circuit module 213 may integrate circuits that implement all functions of the optical living body detection module 210, including control circuits, analog circuits, data analysis, and processing units.

FIG. 4 is a schematic diagram of the circuit module 213 according to an embodiment of the present application. As shown in FIG. 3, the circuit module 213 includes a current driver 2131, a control circuit 2132, a current-voltage conversion circuit and a common-mode suppression circuit 2133, a programmable gain amplifier (Programmable Gain Amplifier, PGA) 2134, and an analog-to-digital converter (Analog- to-Digital Converter (ADC) 2135 and data analysis and processing unit 2136, wherein the current driver 2131 is used to drive the light emitting unit 211, the control circuit 2132 is used to control the light emitting unit 211 to emit optical signals of a specific wavelength, and the current-voltage conversion circuit And common mode suppression circuit 2133 and PGA 2134 are used to perform a series of processing on the electrical signal converted by the photoelectric sensing unit 212 (including integration processing, common mode removal, amplification processing, etc.), and ADC 2135 is used to convert the analog signal to a digital signal The data analysis and processing unit 2136 is used to analyze and process the finally collected data according to different application functions, so as to realize functions such as living body detection, heart rate detection, blood oxygen detection, and blood pressure monitoring.

The light shielding structure 214 is used to isolate the light emitting unit 211 and the photoelectric sensing unit 212.

Since the optical signal returned after entering the target carries the information of the target, and the optical signal not incident to the target does not carry the information of the target, it is necessary to avoid the transmission of the optical signal not incident to the target to the photoelectric sensing unit 212. Therefore, in the embodiment of the present application, the light-emitting structure 214 is used to isolate the light-emitting unit 211 and the photoelectric sensing unit 212, and the light-shielding structure 214 uses an opaque material to avoid or reduce the emission from the light-emitting unit 211 The light is directly incident on the photoelectric sensing unit 212 or transmitted to the photoelectric sensing unit 212 without being incident on the target. In this way, by the above-mentioned setting, the efficiency of the biopsy detection can be improved.

Optionally, in an embodiment of the present application, as shown in FIG. 5, the apparatus 200 may further include:

The target detection module 220 is used to detect whether the target appears outside the device 200.

The target detection module 220 is used to output a target indication signal when the target is detected outside the device 200, and the target indication signal is used to turn on the optical living body detection module 210.

Specifically, in the embodiment of the present application, the target detection module 220 is first used to detect whether the target appears outside the device 200, and when the target is detected outside the device 200, the optical living body detection is turned on Module 210.

The target detection module 220 may use devices such as capacitive sensing, temperature sensing, mechanical keys, mechanical structure plus Hall effect switches to determine whether a target (such as a finger) appears, such as approaching, touching or pressing the device 200; After the target (for example, a finger) appears, a target indication signal is output, for example, the target indication signal is output to the processor of the door lock; the processor then turns on the optical living body detection module 210 according to the target indication signal to perform living body recognition.

The target detection module 220 has low power consumption and may be in a normally open state. The optical living body detection module 210 is only turned on when a target (such as a finger) appears, which can reduce the power consumption of the device.

FIG. 6 shows a system architecture diagram of an embodiment of the present application. As shown in FIG. 6, the optical biopsy detection module 210 and the target detection module 220 are electrically connected to the door lock processor 610, respectively. The target detection module 220 may output a target indication signal to the processor 610 when detecting the presence of a target. The processor 610 turns on the optical living body detection module 210 according to the target instruction signal. The optical living body detection module 210 outputs a living body indication signal to the processor 610 when determining that the target is a living body. The processor 610 opens the door lock according to the living body instruction signal.

7 shows a processing flowchart of an embodiment of the present application. In FIG. 7, taking the target as a finger as an example. The optical living body detection module is in the normally open state, and performs finger detection in real time, that is, whether the finger is approaching / touching / pressing; when the finger is approaching / touching / pressing, the optical living body detection module outputs an instruction signal to the processor, and the processor turns on The living body detection module performs optical living body detection; when the optical living body detection passes, the optical living body detection module outputs an instruction signal to the processor, and the processor outputs an unlock signal to unlock; otherwise, it returns to finger detection.

As shown in FIG. 8, after applying the technical solution of the embodiment of the present application, after the finger presses the effective area of the device 200 for living body recognition, living body recognition is turned on, and when the living body is recognized as a living body, the door lock is automatically opened. When the intruder smashes the cat's eyes outside the door, he reaches into the wire hook to open the inner door handle. If no living body is detected, the door lock cannot be opened.

FIG. 9 shows a schematic structural diagram of a living body recognition device 200 according to an embodiment of the present application.

As shown in FIG. 9, the light emitting unit 211, the photoelectric sensing unit 212, and the circuit module 213 of the optical living body detection module 210 are packaged in one chip. That is to say, the optical living body detection module 210 adopts an integrated package that integrates the light emitting unit 211, the photoelectric sensing unit 212, and the circuit module 213.

Optionally, as shown in FIG. 9, the chip further includes:

A substrate 217, wherein the light emitting unit 211, the photoelectric sensing unit 212 and the circuit module 213 are disposed on the substrate 217;

The packing material 218 is used to encapsulate the chip. The packaging filling material 218 is a light-transmitting material.

The height of the packaging filling material 218 is the same as the light-shielding structure in the chip. In this way, a chip including the substrate 217, the light emitting unit 211, the photoelectric sensing unit 212, the circuit module 213, and the packaging structure 214 may be formed by the packaging filling material 218 (a schematic diagram of the chip package is shown in FIG. 10).

Optionally, as shown in FIG. 9, the optical living body detection module 210 may further include:

The bracket 215 is used to accommodate the light emitting unit 211, the photoelectric sensing unit 212 and the circuit module 213.

A double-sided tape 216 may be used for bonding between the bracket 215 and the chip.

The bracket 215 can increase the structural stability. The material of the bracket 215 is a light-transmitting material. The double-sided adhesive 216 uses opaque materials.

As shown in FIG. 9, the light-shielding structure 214 includes a first light-shielding member 2141 disposed between the light emitting unit 211 and the photoelectric sensing unit 212.

The first light blocking member 2141 uses an opaque material, and can block the light emitted from the light emitting unit 211 from directly entering the photoelectric sensing unit 212.

Alternatively, the first light blocking member 2141 may be closer to the side of the light emitting unit 211. The cross section of the first light blocking member 2141 may be rectangular, inverted trapezoidal, or other shapes with an upper width and a lower width.

Optionally, as shown in FIG. 9, the light-shielding structure 214 further includes a second light-shielding member 2142 disposed on the periphery of the chip. Similarly, the second light blocking member 2142 uses an opaque material.

Two cavities (such as two white spaces in FIG. 10) can be formed by the first shading member 2141 and the second shading member 2142, the light emitting unit 211 is located in one of the cavities, and the photoelectric sensing unit 212 is located in the other cavity in.

The height of the second light blocking member 2142 may be the same as the height of the first light blocking member 2141. The height of the package filling material 218 may be the same as the first light blocking member 2141. In this way, a chip including the substrate 217, the light emitting unit 211, the photoelectric sensing unit 212, the circuit module 213, the first light blocking member 2141, and the second light blocking member 2142 can be encapsulated and formed by the packaging filling material 218.

Optionally, as shown in FIG. 9, the light-shielding structure 214 further includes an opaque layer 2143 disposed on the inner surface of the bracket 215 and located in an area above the first light-shielding member 2141.

The light emitted by the light emitting unit 211 may be transmitted to the photoelectric sensing unit 212 through the reflection in the bracket 215, as shown by the dotted optical path shown in FIG. 11, that is, the light leakage optical path (solid line optical path shown in FIG. 11 Is the effective light path). Therefore, this part of light can be absorbed by providing the opaque layer 2143.

Optionally, the opaque layer 2143 is an ink layer. That is, the opaque layer 2143 may be formed by spraying opaque ink on the designated area of the inner surface of the bracket 215.

The appearance member 219 is disposed above the bracket 215, and a color layer is provided on an inner surface of the appearance member 219. The appearance member 219 may be a cover plate, and inks of different colors may be silk-screened on the inner surface thereof to form color layers of different appearance colors.

The appearance part 219 can be fixed with the bracket 215 by glue 2110. The glue 2110 uses a light-transmitting material.

It should be understood that the appearance member 219 may not be provided as a color member. When the appearance part is not provided, a protective layer may be sprayed on the surface of the bracket 215.

As shown in FIG. 12, in another embodiment, the optical living body detection module 210 may further include:

The protective layer 2111 is disposed above the bracket 215. The protective layer 2111 can protect and prevent scratches.

The solution without the appearance part avoids the absorption and scattering of light by the color layer of the appearance part, so that the optical efficiency is higher.

In the foregoing embodiment, light leakage is prevented by the opaque layer 2143, that is, light that may be transmitted to the photoelectric sensing unit 212 through reflection in the bracket 215 is absorbed. This scheme may also leak light. In order to achieve a better optical path isolation effect, an embodiment of the present application also provides a solution, which is described below in conjunction with FIG. 13. It should be understood that, in addition to the following description, the following embodiments may refer to the descriptions of the foregoing embodiments, and for the sake of brevity, no further description is required.

FIG. 13 shows a schematic structural diagram of a living body recognition device 200 according to another embodiment of the present application.

As shown in FIG. 13, unlike the foregoing embodiment, the light-shielding structure 214 further includes a blocking wall 2144 disposed above the first light-shielding member 2141. In other words, this embodiment does not use the opaque layer 2143, but the retaining wall 2144.

The retaining wall 2144 is made of opaque material. The retaining wall 2144 may penetrate through the bracket 215. Compared with the opaque layer 2143, the use of the retaining wall 2144 can better reduce the transmission leakage of light in the structure.

Optionally, the retaining wall 2144 and the bracket 215 may be integrally formed. For example, a two-color mold injection process may be used, in which a transparent material is used for the bracket 215 and an opaque material is used for the retaining wall 2144, so as to obtain the integrally formed bracket 215 and the retaining wall 2144.

It should be understood that, the retaining wall 2144 and the bracket 215 may also be separate devices, which is not limited in this embodiment of the present application.

Optionally, when the light emitting unit 211 uses invisible infrared light, at this time, the bracket 215 may use a dark infrared transparent material, and the retaining wall 630 may use a black material. black.

In the above embodiment, the light emitting unit 211, the photoelectric sensing unit 212 and the circuit module 213 are packaged in one chip. It should be understood that discrete devices may also be used, described below in conjunction with FIG. 14. It should be understood that, in addition to the following description, the following embodiments may refer to the descriptions of the foregoing embodiments, and for the sake of brevity, no further description is required.

FIG. 14 shows a schematic structural diagram of a living body recognition device 200 according to still another embodiment of the present application.

As shown in FIG. 14, in this embodiment, discrete devices are used. The light emitting unit 211, the photoelectric sensing unit 212 and the circuit module 213 are discrete devices, that is, they are independent and no longer integrated into one chip.

In this embodiment, the shading structure 214 includes a blocking wall 2144, and the blocking wall 2144 is disposed between the light emitting unit 211 and the photoelectric sensing unit 212.

The retaining wall 2144 and the bracket 215 may be integrally formed or be separate devices.

The blocking wall 2144 may penetrate the space from the upper surface of the bracket 215 to the bottom of the light emitting unit 211 and the photoelectric sensing unit 212.

That is to say, in this embodiment, the light-shielding structure 214 may only use the blocking wall 2144 penetrating the space from the upper surface of the bracket 215 to the bottom of the light emitting unit 211 and the photoelectric sensing unit 212.

Optionally, in the embodiments of the present application, the device 200 may further include other necessary components, such as a circuit board 240, which is not limited in the embodiments of the present application.

For the target detection module 220, various detection techniques may be used to detect whether a target (such as a finger) appears, which will be described separately below.

Optionally, in a possible implementation, the target detection module 220 uses a capacitive detection method. For example, as shown in FIGS. 9 and 12-14, the target detection module 220 may include: a metal ring 221 and an electrode 222.

The metal ring 221 surrounds the optical living body detection module 210; the electrode 222 is disposed below the metal ring 221 and is electrically connected to the metal ring 221. For example, conductive adhesive may be used to bond the electrode 222 to the system The change in the capacitance of the ground is used to determine whether the target appears outside the device 200.

Specifically, when a human finger touches the metal ring 221, the capacitance of the electrode 222 to the system ground changes, so that it can be determined that the finger appears. This scheme can usually achieve relatively low power consumption.

Optionally, in another possible implementation manner, the target detection module 220 may be implemented by a mechanical switch. For example, as shown in FIG. 15, the target detection module 220 may include: a touch switch 223. The tact switch 223 may be disposed below the optical living body detection module 210, wherein the state change of the tact switch 223 is used to determine whether the target appears outside the device 200.

Specifically, when the finger is pressed, the touch switch 223 touches the structure 1510, the touch switch 223 is turned on, and the finger touch is recognized; otherwise, the touch switch 223 is turned off, and the finger is recognized as not touching.

Optionally, in another possible implementation manner, the target detection module 220 may be implemented by using a mechanical structure and a Hall effect switch. For example, as shown in FIG. 16, the target detection module 220 may include: a first magnet 224, a second magnet 225, and a Hall effect switch (not shown in the figure, which may be disposed inside the lock body).

The first magnet 224 is disposed on the handle of the door lock. The second magnet 225 is disposed on the lock body of the door lock. The state change of the Hall effect switch may be used to determine whether the target appears outside the device 200.

Specifically, when the door is closed, the distance between the first magnet 224 and the second magnet 225 is relatively short and is in a state of attraction; when the hand rotates the handle, the two magnets are separated. Through the Hall effect, the different states of the Hall effect switch are used to react to the above two states, so that the detection of the hand rotation action can be realized, so as to achieve the purpose of detecting the finger.

Optionally, in another possible implementation manner, the target detection module 220 may be implemented by using a temperature sensing method. In this case, the target detection module 220 may include a temperature sensor, wherein the temperature detected by the temperature sensor is used to determine whether the target appears outside the device 200.

It should be understood that the target detection module 220 may also be implemented by other detection methods, which is not limited in this embodiment of the present application.

The technical solution of the embodiment of the present application uses optical live detection to effectively respond to the brute force method from "cat's eye breaking the door"; it uses a combination of finger detection and optical live detection, and uses a low-power finger detection solution to match a certain short-term power consumption The optical living body detection can effectively extend the battery life of the smart door lock when the battery is powered. Therefore, the technical solutions of the embodiments of the present application can improve the performance of the intelligent door lock.

An embodiment of the present application further provides a door lock, and the door lock may include the above-mentioned living body identification device of the embodiment of the present application.

The door lock may also include a processor. The processor may turn on the optical living body detection module of the device according to the target indication signal output by the target detection module of the device. The processor may also open the door lock according to the living body indication signal output by the optical living body detection module. Relevant descriptions can refer to the above embodiments. For brevity, they will not be repeated here.

It should be understood that the specific examples in the embodiments of the present application are only to help those skilled in the art to better understand the embodiments of the present application, and do not limit the scope of the embodiments of the present application.

It should be understood that the terms used in the embodiments of the present application and the appended claims are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. For example, the singular forms "a", "above", and "the" used in the embodiments of the present application and the appended claims are also intended to include most forms unless the context clearly indicates other meanings.

Persons of ordinary skill in the art may realize that the units of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In the above description, the composition and steps of each example have been generally described in terms of function. Whether these functions are executed in hardware or software depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

In the several embodiments provided in this application, it should be understood that the disclosed system and device may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a division of logical functions. In actual implementation, there may be other divisions, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections through some interfaces, devices, or units, and may also be electrical, mechanical, or other forms of connection.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.

In addition, the functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The above integrated unit may be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application essentially or part of the contribution to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a storage medium In it, several instructions are included to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code .

The above is only the specific implementation of this application, but the scope of protection of this application is not limited to this, any person skilled in the art can easily think of various equivalents within the technical scope disclosed in this application Modifications or replacements, these modifications or replacements should be covered within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A device for living body identification, characterized in that it is used to be installed in a door lock, the device includes an optical living body detection module, and the optical living body detection module includes:

The light emitting unit is used to emit a first optical signal, and the first optical signal is emitted as a second optical signal after entering the target outside the device;

A photoelectric sensing unit, configured to receive the second optical signal and convert the received second optical signal into an electrical signal;

A circuit module, electrically connected to the photoelectric sensing unit, used for determining whether the target is a living body according to the electrical signal;

The shading structure is used to isolate the light emitting unit and the photoelectric sensing unit.
The device according to claim 1, wherein the device further comprises:

The target detection module is used to detect whether the target appears outside the device.
The device according to claim 2, wherein the target detection module is used to output a target indication signal when the target is detected outside the device, and the target indication signal is used to start the optical living body detection Module.
The device according to any one of claims 1 to 3, wherein the circuit module is configured to output a living body indication signal when the target is determined to be a living body, and the living body indication signal is used to open the door lock .
The device according to any one of claims 1 to 4, wherein the circuit module is electrically connected to the light emitting unit and is used to control the light emitting unit to be turned on and off.
The device according to any one of claims 1 to 5, wherein the optical living body detection module further comprises:

A bracket is used to accommodate the light emitting unit, the photoelectric sensing unit and the circuit module.
The device according to claim 6, wherein the material of the bracket is a light-transmitting material.
The device according to any one of claims 1 to 7, wherein the light emitting unit, the photoelectric sensing unit and the circuit module are packaged in one chip.
The device according to claim 8, wherein the light-shielding structure includes a first light-shielding member disposed between the light emitting unit and the photoelectric sensing unit.
The device according to claim 9, wherein the light-shielding structure further comprises a second light-shielding member disposed on the periphery of the chip.
The device according to claim 9 or 10, wherein the light-shielding structure further comprises an opaque layer disposed on the inner surface of the bracket and located in an area above the first light-shielding member.
The device according to claim 11, wherein the opaque layer is an ink layer.
The device according to claim 9 or 10, wherein the light-shielding structure further comprises a retaining wall disposed above the first light-shielding member.
The device according to claim 13, wherein the retaining wall penetrates the bracket.
The device according to any one of claims 8 to 14, wherein the chip further comprises:

A substrate, wherein the light emitting unit, the photoelectric sensing unit and the circuit module are provided on the substrate;

An encapsulating filling material is used to encapsulate the chip.
The device according to claim 15, wherein the height of the encapsulation filling material is the same as that of the first light shielding member.
The device according to claim 15 or 16, wherein the encapsulation filling material is a light-transmitting material.
The device according to any one of claims 1 to 7, wherein the light emitting unit, the photoelectric sensing unit and the circuit module are discrete devices.
The device according to claim 18, wherein the light-shielding structure includes a blocking wall disposed between the light emitting unit and the photoelectric sensing unit.
The device according to claim 19, wherein the retaining wall is integrally formed with the bracket or is a discrete device.
The device according to claim 19 or 20, wherein the retaining wall penetrates the space from the upper surface of the bracket to the bottom of the light emitting unit and the photoelectric sensing unit.
The device according to any one of claims 6 to 21, wherein the optical living body detection module further comprises:

The appearance part is provided above the bracket, and a color layer is provided on the inner surface of the appearance part.
The device according to any one of claims 6 to 21, wherein the optical living body detection module further comprises:

The protective layer is arranged above the bracket.
The device according to any one of claims 1 to 23, wherein the number of the light emitting unit and the photoelectric sensing unit are one or more.
The device according to any one of claims 2 to 24, wherein the target detection module comprises:

A metal ring surrounding the optical living body detection module;

An electrode is provided below the metal ring and electrically connected to the metal ring, wherein the change in capacitance of the electrode to the system ground is used to determine whether the target appears outside the device.
The device according to any one of claims 2 to 24, wherein the target detection module comprises:

A tact switch is provided under the optical living body detection module, wherein the state change of the tact switch is used to determine whether the target appears outside the device.
The device according to any one of claims 2 to 24, wherein the target detection module comprises:

The first magnet is arranged on the handle of the door lock;

The second magnet is arranged on the lock body of the door lock;

A Hall effect switch, wherein the state change of the Hall effect switch is used to determine whether the target appears outside the device.
The device according to any one of claims 2 to 24, wherein the target detection module comprises:

A temperature sensor, wherein the temperature detected by the temperature sensor is used to determine whether the target appears outside the device.
A door lock, characterized by comprising the device for living body identification according to any one of claims 1 to 28.
The door lock according to claim 29, wherein the door lock further comprises:

The processor is configured to turn on the optical living body detection module of the device according to the target instruction signal output by the target detection module of the device, and open the door lock according to the living body instruction signal output by the optical living body detection module.