CN210573970U - Vena digitalis access control system - Google Patents
Vena digitalis access control system Download PDFInfo
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- CN210573970U CN210573970U CN201921470149.0U CN201921470149U CN210573970U CN 210573970 U CN210573970 U CN 210573970U CN 201921470149 U CN201921470149 U CN 201921470149U CN 210573970 U CN210573970 U CN 210573970U
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Abstract
The utility model discloses a finger vein entrance guard and system belongs to safety control technical field, the finger vein entrance guard includes the casing, be provided with touch display screen and finger vein collection module on the casing, touch display screen includes display module and touch input module, be provided with in the casing and be used for accomplishing finger vein image acquisition, finger vein feature extraction and compare, show with the host system of various logic processing, be used for accomplishing the singlechip module of entrance guard partial control and be used for carrying out the security module that encrypts to the finger vein sensitive information of outside sending. The finger vein access control system of the utility model integrates door lock control, and is not needed to be matched with an additional access controller for use, thus having low cost; and the security module is arranged for encryption protection, so that the security is high.
Description
Technical Field
The utility model relates to a safety control technical field especially indicates a finger vein entrance guard and system.
Background
Present entrance guard is various, and along with the development of science and technology, biological identification entrance guard is more and more popularized, especially fingerprint entrance guard, people's face entrance guard more and more use to places such as each office, mill, school. The biometric identification scheme has respective advantages and disadvantages, for example, although the fingerprint identification has low cost and mature technology, the fingerprint identification has residues, is easy to copy and cannot be detected; the human face recognition also has the defect that the human face cannot be checked, and the human face entrance guard with the checking function has higher cost; the finger vein recognition must be a living body to participate in recognition, has the advantage of low cost, and is increasingly applied to various biological recognition fields, and finger vein access is one of the application directions.
At present, the finger vein access control is carried out by using an independent finger vein acquisition instrument, the door lock control is lacked, an additional access controller needs to be matched for use, and the finger vein access control cost is overhigh; and the transmission of finger vein images and characteristics lacks encryption protection, is easy to be attacked and lacks security.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a finger vein entrance guard and system with low costs, the security is high.
The utility model provides a technical scheme as follows:
on the one hand, provide a finger vein access control, which comprises a housin, be provided with touch display screen and finger vein collection module on the casing, touch display screen includes display module and touch input module, be provided with in the casing and be used for accomplishing finger vein image acquisition, finger vein feature extraction and compare, show with various logic processing's host system, be used for accomplishing the singlechip module of entrance guard's partial control and be used for carrying out the security module encrypted to the finger vein sensitive information of outside sending, wherein:
the single chip microcomputer module, the safety module, the display module, the touch input module and the finger vein acquisition module are all connected to the main control module;
the main control module is connected with an external communication interface, and the communication interface comprises an RS485 interface and/or an Ethernet interface;
the single chip microcomputer module is connected with an external control interface, and the control interface comprises single-door double-pass control, door lock sensor access, a doorbell and/or a door exit switch.
The utility model discloses some embodiments, the safety module upper shield is equipped with the metal protection shell, be provided with in the metal protection shell and be used for doing the independent power supply of safety module power supply, be provided with on the metal protection shell and be used for detecting the micro-gap switch of prizing, micro-gap switch is connected to safety module.
In some embodiments of the present invention, the main control module communicates with the single chip microcomputer module and the security module through an SPI interface;
the main control module is connected with the display module through a serial port;
the main control module is connected with the touch input module through an I2C interface;
the main control module is connected with the finger vein acquisition module through a DVP interface, an I2C interface and a GPIO.
The utility model discloses in some embodiments, single chip module passes through GPIO connection host system's pin that resets, host system to single chip module sends the heartbeat package, works as when single chip module can not detect the heartbeat package, right host system resets.
In some embodiments of the present invention, the main control module performs data communication with the outside through an isolation transformer and a network port, and simultaneously performs data communication with an external host or a server through a 485 interface isolated by an optical coupler; the single chip microcomputer module is connected with an external sensor interface through an optical coupler, and the output of the lockset is controlled through a relay.
The utility model discloses some embodiments, still be provided with audio module on the casing, host system pass through audio frequency interface with audio module links to each other.
In some embodiments of the present invention, the housing comprises a rear housing for fitting against a wall and a front housing mounted on the rear housing, wherein:
the finger vein acquisition module comprises a wedge-shaped convex shell extending forwards from the front shell, a finger placing part is formed on the wedge-shaped convex shell, a finger vein acquisition window is arranged in the middle of the finger placing part, and an included angle between the plane of the finger vein acquisition window and the vertical plane of the front shell is 20-60 degrees; the finger placing part is characterized in that a near-infrared lamp is arranged on one side of the finger placing part, a reflector is arranged on one side, opposite to the near-infrared lamp, inside the wedge-shaped convex shell, an image sensor is further arranged inside the wedge-shaped convex shell, opposite to the reflector, and an imaging lens is arranged between the image sensor and the reflector.
In some embodiments of the present invention, the finger placing portion includes a first side wall and a second side wall which are oppositely disposed, the height of the first side wall is greater than the height of the second side wall, the near infrared lamp is located inside the first side wall, the distance between the first side wall and the second side wall is smaller than the width of a finger, the finger placing portion further includes an arc top wall, the arc top wall is connected to the upper ends of the first side wall and the second side wall, so that the inside of the arc top wall forms a fingertip position indicating portion.
The utility model discloses in some embodiments, finger vein collection window is provided with the printing opacity lens, the back of printing opacity lens is provided with infrared filter, speculum and image sensor are located wedge convex shell lower part is inboard, speculum place plane with contained angle between the vertical plane at preceding shell place is 45 degrees, image sensor's camera lens optical axis is on a parallel with the vertical plane at preceding shell place.
On the other hand, the finger vein access control system comprises any one of the finger vein access control system and an access control electronic lock connected with the finger vein access control system.
The utility model discloses following beneficial effect has:
the finger vein access control system of the utility model integrates door lock control, and is not needed to be matched with an additional access controller for use, thus having low cost; and the security module is arranged for encryption protection, so that the security is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic block diagram of an overall circuit of the finger vein access control system of the present invention;
FIG. 2 is a schematic circuit diagram of a main control module in the finger vein access control system shown in FIG. 1;
FIG. 3 is a schematic circuit diagram of a single-chip module in the finger vein access control system shown in FIG. 1;
FIG. 4 is a schematic circuit diagram of a security module in the finger vein access control module shown in FIG. 1;
fig. 5 is a schematic perspective view of a housing of the finger vein access control system shown in fig. 1;
FIG. 6 is a right side view of the housing of the finger vein access gate of FIG. 5;
FIG. 7 is a bottom view of the housing of the finger vein access gate of FIG. 5;
FIG. 8 is a rear view of the housing of the finger vein access gate of FIG. 5;
fig. 9 is a schematic diagram of an optical path of the finger vein access control device shown in fig. 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
On the one hand, the utility model provides a finger vein access control, as shown in fig. 1-9, including casing 1, casing 1 is last to be provided with touch display screen 2 and finger vein collection module 3, touch display screen 2 includes display module 201 and touch input module 202, be provided with in the casing 1 and be used for accomplishing finger vein image acquisition, finger vein characteristic draws and compares, show host system 200 with various logic processing, be used for accomplishing the singlechip module 203 of entrance guard partial control, and be used for carrying out encrypted security module 204 to the finger vein sensitive information (indicating vein image and characteristic etc.) of outside sending, wherein:
the single chip microcomputer module 203, the safety module 204, the display module 201, the touch input module 202 and the finger vein acquisition module 3 are all connected to the main control module 200;
the main control module 200 is connected with an external communication interface 205, and the communication interface 205 may include an RS485 interface and/or an ethernet interface, etc.;
the single chip module 203 is connected with an external control interface 206, and the control interface 206 may include single-door double-pass control, door lock sensor access, a doorbell and/or an exit switch, etc.
The utility model discloses following beneficial effect has:
1. the main chip of the original finger vein acquisition module part is eliminated, the functions of the main chip are integrated on the main control module of the access control equipment, and the main control module is used for completing the whole functions, so that the cost is saved;
2. all external control interface control is finished by using an independent single chip microcomputer module, and the high stability and the anti-interference performance of the single chip microcomputer are utilized to ensure the high stability of the whole machine;
3. the security module can protect sensitive data from being illegally acquired and tampered.
In conclusion, the finger vein access control of the utility model integrates door lock control, and is not needed to be matched with an additional access controller for use, so that the cost is low; and the security module is arranged for encryption protection, so that the security is high.
In order to further improve the safety, it is preferable that a metal protective shell (not shown) is covered on the safety module 204, an independent power supply for supplying power to the safety module 204 is arranged in the metal protective shell, and a micro switch for detecting prying is arranged on the metal protective shell and connected to the safety module 204. The security module is powered by the independent power supply, when the access control equipment is connected with the main power supply, the security module is powered by the main power supply, under the condition that the main power supply is powered off, the security module is powered by the independent power supply independently, the security module is guaranteed to be always in a working state, no matter whether the access control equipment is powered, when someone wants to pry off the metal protective shell to illegally obtain sensitive data such as a secret key in the security module, the microswitch can detect the sensitive data, and informs an encryption chip in the security module to erase the secret key so as to disable the integral function of the equipment, so that the secret key is prevented from being illegally obtained and tampered, and the security of the access control equipment is guaranteed.
The utility model discloses in, the relation of connection between each module is preferred as follows:
the main control module 200 communicates with the single chip microcomputer module 203 through the SPI interface, for example, sends an unlocking instruction to the single chip microcomputer module 203, and after receiving the instruction, the single chip microcomputer module 203 controls the lock to be unlocked through the control interface 206;
the main control module 200 communicates with the security module 204 through the SPI interface to complete encryption and transmission of sensitive data inside the security module 204;
the main control module 200 is connected with the display module 201 through a serial port to complete the display function; the display module 201 can adopt a 4.0-inch LCD screen, and interface display can be well completed with the resolution of 800 × 480;
the main control module 200 is connected with the touch input module 202 (which may adopt a multi-touch capacitive touch screen) through an I2C interface, and completes a human-computer interaction function together with the display module 201; for example, a user clicks a touch screen, displays an input password, enters a management menu after inputting a correct password through the touch screen, and can perform operations such as password modification and IP address setting;
the main control module 200 is connected to the finger vein acquisition module 3 (specifically, an image sensor, an infrared fill light, and a finger detection module) through a DVP interface, an I2C interface, and a GPIO, performs finger detection and finger vein image acquisition, and sends the finger vein image to the main control module 200. Specifically, when the finger detection module of the finger vein collection module 3 detects that a finger is put in, the main control module 200 is notified through the GPIO, the main control module 200 opens the infrared light supplement lamp of the finger vein collection module 3 through the GPIO, the register of the finger vein image sensor is initialized through the I2C interface, the finger vein image sensor is started to collect a finger vein image, the collected finger vein image is acquired through the DVP interface, and finger vein image collection is completed.
Further, the single chip microcomputer module 203 is connected with a reset pin of the main control module 200 through a GPIO (general purpose input/output), the main control module 200 sends a heartbeat packet to the single chip microcomputer module 203, and when the single chip microcomputer module 203 cannot detect the heartbeat packet, the main control module 200 is reset through the GPIO, so that the main control module 200 is monitored to prevent from being halted, the main control module 200 can be reset under abnormal conditions, and the stability is improved; meanwhile, each time a heartbeat packet is sent, the single chip microcomputer module 203 can reply the information such as the door magnetic state of the current peripheral interface to the main control module 200.
Further, the main control module 200 may perform data communication with the outside through an isolation transformer and a network port, and may perform data communication with an external host or a server through a 485 interface isolated by an optical coupler; the single chip module 203 can be connected with an external sensor interface through an optical coupler, and the output of the lockset is controlled through a relay. The problem that internal electronic components are easily damaged due to external interference in the working process of the access control equipment can be avoided.
Further, an audio module 207 (specifically, a speaker and/or a microphone may be included) may be further disposed on the housing 1, and the main control module 200 is connected to the audio module 207 through an audio interface to complete recording and sound playing functions. For example, the speaker prompts that the collection is successful when the finger vein collection module 3 finishes the collection, and prompts that the collection is failed if the finger vein collection module 3 fails to collect; when the device anti-disassembly switch is triggered, the loudspeaker plays an alarm sound and the like.
The utility model discloses in, host system 200 can have ethernet interface and UART interface to carry out uploading and issuing of data through these two kinds of communication interfaces. For example, the finger vein acquisition module 3 acquires a finger vein image and transmits the finger vein image and the characteristics to the main control module 200 through the DVP interface, the main control module 200 transmits the finger vein image and the characteristics to the server through the ethernet interface or the RS485 interface, or the server transmits the finger vein image or the finger vein characteristic points to the main control module 200 through the ethernet interface or the RS485 interface to be used as a comparison template, so that registration is not required to be performed on all terminals under the condition of multiple terminals.
The utility model discloses contained host system 200, security module 204 and finger vein collection module 3 and external communication interface 205, can realize that finger vein characteristic and finger vein image pass to the server after encrypting, protected the safety of finger vein data. For example, the finger vein image is collected by the finger vein collection module 3 and then transmitted to the main control module 200 through the DVP interface, the main control module 200 calculates the finger vein feature through the feature extraction algorithm, and transmits the finger vein feature and/or the finger vein image to the security module 204 through the SPI interface for encryption, the security module 204 encrypts the finger vein feature and/or the finger vein image by using the encryption algorithm and then transmits the ciphertext to the main control module 200 through the SPI interface, the main control module 200 uploads the ciphertext to the server through the communication interface 205, and even if data is leaked at the communication interface 205, privacy cannot be leaked, and the security of the data is ensured.
Fig. 2 is the utility model discloses a master control module 200's circuit schematic diagram among finger vein entrance guard, as shown in fig. 2, master control module 200 can include main CPU, and main CPU can be connected with clock circuit, reset circuit, RTC power, prevents tearing open detection, debugging interface, burns record interface, BOOT selection, NOR FLASH, peripheral hardware interface and communication interface etc.. The main CPU can use a processor with an MIPS framework, and the processor has the characteristics of high performance, low power consumption, high integration level and low cost, and is very helpful for the miniaturization and low cost of products.
FIG. 3 is a schematic circuit diagram of the singlechip module 203 in the finger vein access control system of the present invention, such as
As shown in fig. 3, the single chip module 203 may include a single chip, and the single chip may be connected to a clock circuit, a reset circuit, a burning interface, a peripheral interface, a communication interface, and the like. The single chip microcomputer can use a COTEX M0 framework and has high stability, high anti-interference performance and real-time performance.
Fig. 4 is the utility model discloses a Circuit schematic diagram of security module 204 among finger vein entrance guard, as shown in fig. 4, security module 204 can include encryption IC (Integrated Circuit), and encryption IC can be connected with clock Circuit, reset Circuit, battery powered, burns record interface, prevents tearing open detection and communication interface etc.. The encryption IC can adopt a domestic chip with national secret qualification, and the cost is not increased too much while the security function is completed.
The finger vein access control system of the embodiment of the present invention is described below with reference to the mechanical structure layer.
As shown in fig. 5-9, the housing 1 of the finger vein access control may comprise a rear shell 11 for mounting against a wall and a front shell 12 mounted on the rear shell 11, wherein:
the finger vein collection module 3 comprises a wedge-shaped convex shell 31 extending forwards from the front shell 12, a finger placing part 32 is formed on the wedge-shaped convex shell 31, and a finger vein collection window 33 is arranged in the middle of the finger placing part 32, as shown in fig. 6, an included angle theta between a plane where the finger vein collection window 33 is located and a vertical plane where the front shell 12 is located is 20-60 degrees, preferably 40-45 degrees, so that when the finger vein entrance guard is fixed on a wall, a user can conveniently stretch a finger into the finger vein to identify a finger vein image;
a near-infrared lamp 34 (i.e., the aforementioned infrared light supplement lamp) is disposed on one side of the finger placement portion 32 and used as a light source for illuminating the fingers to develop the finger veins; as shown in fig. 7 and 9, a reflector 35 is disposed inside the wedge-shaped convex shell 31 on a side opposite to the near-infrared lamp 34, an image sensor 36 (specifically, a CCD or CMOS sensor) disposed inside the wedge-shaped convex shell 31 and opposite to the reflector 35 is further disposed, and an imaging lens 37 (specifically, a convex lens or a plano-convex lens) is disposed between the image sensor 36 and the reflector 35.
The principle of the finger vein recognition technology is that the characteristic that red blood cells in veins absorb specific near infrared rays is utilized, the near infrared rays irradiate a finger, and an image sensor senses light transmitted by the finger to acquire a vein image inside the finger, so that biological feature recognition is performed. The key point is that hemoglobin in red blood cells flowing through veins absorbs near infrared rays with the wavelength of 700-1000 nanometers, so that the near infrared rays are less transmitted in the vein part, after the near infrared rays are transmitted, the veins are highlighted on an image sensed by an image sensor, and muscles, bones and other parts of fingers are penetrated and weakened, so that a clear vein blood vessel image is obtained. The finger vein recognition technology utilizes the vein of the finger vein to carry out identity authentication, is harmless to human bodies, and has the characteristics of being not easy to steal, forge and the like.
During the use, wait to discern the user and place the finger at the finger portion of placing, the near infrared lamp is lighted in the control of master control module control, and under the irradiation of near infrared lamp, the finger vein image is through imaging on image sensor behind speculum and the imaging lens after finger vein collection window again, then sends the finger vein image of image sensor collection to master control module and compares the discernment, and the recognition result is compared in the output at last.
The utility model discloses finger vein entrance guard of above-mentioned structure has following beneficial effect:
1. the finger vein access control system is characterized in that a finger vein acquisition module is embedded in a finger vein access control device, the finger vein acquisition module is designed in a wedge-shaped convex shell extending forwards from a front shell, with the help of the wedge-shaped convex shell, an included angle between a plane where a finger vein acquisition window is located and a vertical plane where the front shell is located is 20-60 degrees, a user can acquire a clear finger vein image by placing a finger on a finger placing part according to the included angle, the angle accords with the human engineering design, and the use comfort level is good;
2. the reflector is arranged in the finger vein acquisition module, the length of a light path can be shortened, and the reflector and the image sensor are reasonably arranged in the wedge-shaped convex shell extending forwards from the front shell, so that the occupation of extra space is avoided, the size of the finger vein acquisition module is greatly reduced, and the size of the whole finger vein entrance guard can be further reduced;
3. safety and stability: the vein blood vessel distribution image characteristics of the human finger are adopted for identification and verification, so that the finger can not be copied, counterfeited, stolen and counterfeited, is not influenced by the surface condition and the physical condition of the finger, and has ultrahigh safety and stability;
4. the precision is high: the detection sample is the internal blood vessel information of the finger vein, and is not interfered by the outside world in the matching process, so that the accuracy is extremely high. Medical evidence: the distribution of finger veins between different persons is different from that of each finger of the same person, and the distribution of finger veins of each adult is invariable, and therefore, the finger vein recognition is unique.
5. Convenient and fast: simple operation and is not influenced by external environments such as rough epidermis, unclear fingerprint or temperature, humidity and the like.
To sum up, the finger vein entrance guard of the embodiment of the utility model is embedded with the finger vein collection module, the finger vein collection module is designed in the wedge-shaped convex shell extending forwards from the front shell, and by means of the wedge-shaped convex shell, an included angle is formed between the plane of the finger vein collection window and the vertical plane of the front shell, so that a user can place fingers conveniently, the angle accords with the ergonomic design, and the use comfort is good; be provided with the speculum in the finger vein collection module, can shorten the length of light path to speculum and image sensor are rationally put in wedge convex shell, have avoided occuping of extra space, very big size of having reduced finger vein collection module, and then can reduce the size of whole finger vein entrance guard. Meanwhile, the finger vein entrance guard has high identification precision, is convenient and quick to use, is not easy to steal and imitate, and has high safety and reliability.
As shown in fig. 5 to 6, to facilitate finger placement, the finger placement part 32 may include a first sidewall 321 and a second sidewall 322 oppositely disposed, the first sidewall 321 has a height greater than that of the second sidewall 322 (as can be seen from fig. 6), and the near-infrared lamp 34 is located inside the first sidewall 321. Thus, since the first sidewall 321 is higher than the second sidewall 322, the finger can be tightly attached to the inner side of the first sidewall 321 when placed, and the left and right positions of the finger can be conveniently positioned. The inner side surface of the first sidewall 321 may also be provided with a light source lens to protect the near-infrared lamp 34.
The distance between the first side wall 321 and the second side wall 322 is preferably smaller than the width of the finger, so that the second side wall 322 can suspend the finger above the finger vein collection window 33 in an overhead manner, thereby facilitating the positioning of the finger in the height direction and realizing the non-contact collection of the finger vein image.
In addition, the finger placing part 32 may further include an arc top wall 323, the arc top wall 323 connects the upper ends of the first side wall 321 and the second side wall 322, so that a fingertip position indicating part 324 is formed inside the arc top wall 323, and when the finger placing device is used, a user to be recognized places a finger downwards with the fingertip position aligned with the fingertip position indicating part 324, so that the front and back position positioning of the finger can be conveniently realized.
In order to improve the collection effect of the finger vein image, the finger vein collection window 33 may be provided with a transparent lens (not shown), and the back surface of the transparent lens is provided with an infrared filter 38 that only allows near infrared rays to pass through, so as to filter the visible light of the environment, avoid the interference of the ambient light to the finger vein image, improve the purity of the finger vein image, and improve the accuracy of the finger vein identification.
in order to fully utilize the space, it is preferable that the reflector 35 and the image sensor 36 are located inside the lower portion of the wedge-shaped convex shell 31 (i.e. the opening portion at the lower portion of the included angle θ in fig. 6), and when the wedge-shaped convex shell is specifically placed, as shown in fig. 7, the included angle α between the plane where the reflector 35 is located and the vertical plane where the front shell 12 is located may be 45 degrees, and the lens optical axis oa (optical axis) of the image sensor 36 may be parallel to the vertical plane where the front shell 12 is located.
In some embodiments of the present invention, as shown in fig. 8, a micro switch 5 may be disposed on the rear housing 11, the micro switch 5 is in a pressed state when the rear housing 11 is mounted on the wall, and the micro switch 5 is connected to the main control module 4. The microswitch 5 is used as a prying-resistant switch, under normal conditions, the microswitch 5 is in a pressed state, and when a lawbreaker wants to pry the finger vein entrance guard from a wall body, the microswitch 5 is popped up to inform the main control module 4, so that an alarm is given.
The utility model discloses in other embodiments, can be provided with pilot lamp 6 on the finger vein collection module 3 for indicate the recognition status of finger vein image, for example, the pilot lamp is green when finger vein image recognition succeeds, and the pilot lamp is red when finger vein image recognition fails, sends voice prompt to the user through the speaker simultaneously, and the suggestion user discerns finger vein image again, and also gives corresponding suggestion on the touch display screen, makes the user can directly perceivedly know whether finger vein image discerns successfully.
In still other embodiments of the present invention, as shown in fig. 7, the bottom of the front shell 12 may be provided with a USB interface 7, a speaker 8, a microphone 9 and/or a reset button 10, wherein the reset button is used for restarting when the finger vein access control fails; as shown in fig. 8, the back of the rear shell 11 can be provided with an interface module 15, the interface module 15 includes a power supply interface and/or a 485 interface, etc., wherein, the power supply interface is used for being connected with a power supply system, and is used for supplying power to the finger vein entrance guard, and the 485 interface is used for enabling the finger vein entrance guard to be connected with an entrance guard electronic lock, specifically, the main control module can be connected with a USB to 485 circuit board through a USB cable, and the control signal is converted by the aid of the USB to 485 circuit board, so that the anti-noise interference performance of the control signal is improved. Fig. 8 shows a mounting structure 16 of the rear housing 11 to a wall, which may be embodied as a hook groove or other structures that may be easily conceived by those skilled in the art.
On the other hand, the utility model provides a finger vein access control system, including the aforesaid arbitrary finger vein entrance guard and the entrance guard electronic lock that links to each other with finger vein entrance guard. Because finger vein entrance guard's structure is the same with last, and entrance guard's electronic lock is prior art, and therefore the no longer repeated description here.
When the electronic lock is used, the finger vein access control device identifies a finger vein image by the finger vein acquisition module embedded in the finger vein access control device, sends the identified finger vein image to the main control module in the finger vein access control device for processing, analysis, storage and identification, and informs the singlechip module after an identification result is obtained, and the singlechip module sends a control signal to the electronic lock of the access control device so as to control the opening and closing actions of the electronic lock of the access control device.
The utility model discloses a finger vein access control system gathers and transmits the main control module in to finger vein image through finger vein collection module and compares the discernment, in the use, only need gather finger vein image through finger vein collection module, can discern the authentication and realize entrance guard's opening control to user's identity, convenient and fast need not to carry any article, and the finger vein belongs to health internal feature, can't be stolen and forge, and the security is higher.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a finger vein access control, includes the casing, be provided with touch display screen and finger vein collection module on the casing, touch display screen includes display module and touch input module, a serial communication port, be provided with in the casing and be used for accomplishing finger vein image acquisition, finger vein feature extraction and compare, show with various logic processing's host system, be used for accomplishing the singlechip module of entrance guard's partial control and be used for carrying out the security module encrypted to the finger vein sensitive information of outside sending, wherein:
the single chip microcomputer module, the safety module, the display module, the touch input module and the finger vein acquisition module are all connected to the main control module;
the main control module is connected with an external communication interface, and the communication interface comprises an RS485 interface and/or an Ethernet interface;
the single chip microcomputer module is connected with an external control interface, and the control interface comprises single-door double-pass control, door lock sensor access, a doorbell and/or a door exit switch.
2. The finger vein access control of claim 1, wherein a metal protective shell is covered on the safety module, an independent power supply for supplying power to the safety module is arranged in the metal protective shell, a micro switch for detecting prying is arranged on the metal protective shell, and the micro switch is connected to the safety module.
3. The finger vein access control system according to claim 1, wherein the main control module communicates with the single chip microcomputer module and the safety module through an SPI interface;
the main control module is connected with the display module through a serial port;
the main control module is connected with the touch input module through an I2C interface;
the main control module is connected with the finger vein acquisition module through a DVP interface, an I2C interface and a GPIO.
4. The finger vein entrance guard of claim 1, wherein the single chip microcomputer module is connected with a reset pin of the main control module through a GPIO (general purpose input/output), the main control module sends a heartbeat packet to the single chip microcomputer module, and when the single chip microcomputer module cannot detect the heartbeat packet, the main control module is reset.
5. The finger vein access control system of claim 1, wherein the main control module is in data communication with the outside through an isolation transformer and a network port, and is in data communication with an external host or a server through a 485 interface isolated by optical couplers; the single chip microcomputer module is connected with an external sensor interface through an optical coupler, and the output of the lockset is controlled through a relay.
6. The finger vein access control of claim 1, wherein the housing is further provided with an audio module, and the main control module is connected with the audio module through an audio interface.
7. The finger vein access control of any one of claims 1-6, wherein said housing comprises a rear housing for mounting against a wall and a front housing mounted on said rear housing, wherein:
the finger vein acquisition module comprises a wedge-shaped convex shell extending forwards from the front shell, a finger placing part is formed on the wedge-shaped convex shell, a finger vein acquisition window is arranged in the middle of the finger placing part, and an included angle between the plane of the finger vein acquisition window and the vertical plane of the front shell is 20-60 degrees; the finger placing part is characterized in that a near-infrared lamp is arranged on one side of the finger placing part, a reflector is arranged on one side, opposite to the near-infrared lamp, inside the wedge-shaped convex shell, an image sensor is further arranged inside the wedge-shaped convex shell, opposite to the reflector, and an imaging lens is arranged between the image sensor and the reflector.
8. The finger vein entrance guard of claim 7, wherein the finger placement portion comprises a first side wall and a second side wall which are oppositely arranged, the height of the first side wall is greater than that of the second side wall, the near infrared lamp is positioned on the inner side of the first side wall, the distance between the first side wall and the second side wall is smaller than the width of a finger, the finger placement portion further comprises an arc-shaped top wall, and the arc-shaped top wall is connected with the upper ends of the first side wall and the second side wall, so that a fingertip position indicating portion is formed on the inner side of the arc-shaped top wall.
9. The finger vein entrance guard of claim 7, wherein the finger vein collection window is provided with a transparent lens, the back surface of the transparent lens is provided with an infrared filter, the reflector and the image sensor are located on the inner side of the lower portion of the wedge-shaped convex shell, the included angle between the plane where the reflector is located and the vertical plane where the front shell is located is 45 degrees, and the optical axis of the lens of the image sensor is parallel to the vertical plane where the front shell is located.
10. A finger vein access control system, comprising a finger vein access control and an electronic access control lock connected with the finger vein access control, wherein the finger vein access control is the finger vein access control of any one of claims 1-9.
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| CN201921470149.0U CN210573970U (en) | 2019-09-04 | 2019-09-04 | Vena digitalis access control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112270287A (en) * | 2020-11-09 | 2021-01-26 | 辽宁工程技术大学 | Palm vein identification method based on rotation invariance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112270287A (en) * | 2020-11-09 | 2021-01-26 | 辽宁工程技术大学 | Palm vein identification method based on rotation invariance |
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