JPH0245884A - Fingerprint collating device - Google Patents

Abstract

PURPOSE:To improve an operability, a collation rate and a maintainability by isolating the internal part of a fingerprint input part at the time of a non- action from an external part for an operating body, and moving the operating body only when accepted person conditions to be inputted coincide with conditions to be specified beforehand. CONSTITUTION:When the fact that an inputted password is of a just user is judged by an accepted person decision means 611, an electromagnet 114 is demagnetized and turned off. Thus, when the user pushes an operating body 115 with a finger, the operating body 115 can be pushed towards a limit switch 32. As to fingerprint input image data, when the fingerprint of the finger to push the operating body 115 is inputted and the limit switch 32 is turned on, the feature part is extracted. Fingerprint data to be registered beforehand and fingerprint data to be inputted are compared and checked, and a result is outputted from a check result output part 3. When the user retracts the finger meanwhile, the limit switch 32 is turned off, and an electromagnet energizing means 614 energizes the electromagnet 114. Thus, the finger of the user is pressed out along with the operating body 115.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fingerprint verification device, and in particular, to improve the operability of a fingerprint input section in the fingerprint verification device,
The present invention relates to a fingerprint verification device that improves the verification rate, improves maintainability, and prevents damage or malfunction due to unexpected operations on the fingerprint input section. The present invention also relates to a fingerprint verification device that can remove dirt from fingers.

The fingerprint verification device of the present invention is used, for example, for access control in a security management system.

[Conventional technology]

Since fingerprints are different for each individual, various fingerprint matching devices for identifying individuals using fingerprints have been proposed, and some have been put into practical use. One example of application of such a fingerprint verification device is a security management system. In security management systems, fingerprint verification devices are used to control the entry and exit of specific persons. The outline is described below. In advance, a specific user's finger is scanned, the characteristic parts of the fingerprint are extracted, and the pattern is further registered. When the user enters or exits, he or she places his or her finger on the fingerprint input section of the fingerprint verification device. The fingerprint matching device scans the user's finger, extracts the characteristic parts of the fingerprint, turns it into a pattern, and compares the pattern with a pre-registered fingerprint pattern to determine whether there is a match. If they match, it is assumed that the person is the correct person. In this way, by using fingerprints, accurate entry/exit control becomes possible.

[Problem to be Solved by the Invention] When comparing and matching fingerprint patterns, even if the fingerprints are from the same person, the pressure of the finger when inputting the fingerprint, dirt on the palm of the finger, position of the finger at the time of input, and The fingerprint pattern may be input as a different fingerprint pattern than the one at the time of registration due to movement of the fingerprint, etc.
May be considered inconsistent. In this way, when using a fingerprint verification device, it is determined that there is a mismatch due to the user's operating conditions not being as planned, rather than the accuracy of the verification algorithm, reducing the verification rate and forcing the user to perform the operation again. There are problems with accuracy, usability, verification time, etc. Furthermore, although the fingerprint input section has a recessed mechanism for placing a finger, dust and the like tend to adhere thereto, and the adhering dust causes errors in fingerprint pattern input. The fingerprint input unit optically scans fingerprints, but when a finger is placed on it, it gets dirty and causes input errors, so maintenance work such as wiping with alcohol or cloth is required by the operator.

Further, a foreign object or a stick may be inserted into the fingerprint input section intentionally or by mischief, and the optical system may be damaged. If the optical system is scratched, fingerprint input will be incorrect.

As described above, conventional fingerprint verification devices encounter various problems in actual operation.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and provide a fingerprint verification device that is easy to operate, has a high matching rate, is easy to maintain, and is less susceptible to mischief.

[Means to solve the problem]

According to the present invention, there is provided an acceptor input unit for inputting predetermined acceptor conditions, a fingerprint input unit for scanning an actual finger and inputting fingerprint data, and a collation unit storing pre-registered fingerprint data. a fingerprint data storage means for comparison; and a verification means for comparing and verifying the actual extracted fingerprint data from the fingerprint input section and the registered fingerprint data from the verification fingerprint data storage means; The input section has an operating body, and the operating body isolates the interior of the non-operating fingerprint input section from the outside, and allows the acceptor conditions input by wiping the acceptor input section to meet predetermined conditions. There is provided a fingerprint verification device characterized in that the operating body is configured to be movable only when a match is found.

The fingerprint input section includes a container containing compressed gas, an on-off valve for the container, and a compressed gas conduit, and is configured to introduce the compressed gas into the fingerprint input section.

The fingerprint input section includes a dirt removal section and is configured to remove dirt adhering to the finger.

[For production]

The finger is properly fixed during the actual fingerprint input. This improves the accuracy of fingerprint input, improves the matching rate, and improves the degree of use.

The inside of the fingerprint input section is configured to be opened to the outside only when a fingerprint is read, thereby preventing the attachment of dust and damage to the device due to tampering.

By providing the dirt removal section in the fingerprint input section, maintainability and fingerprint input accuracy can be improved.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, as an embodiment of the fingerprint matching device of the present invention, a case where it is used for access control in a security management system will be described with reference to the accompanying drawings.

FIG. 1 is a plan view of an operation panel section of a fingerprint matching device as an embodiment of the present invention. FIG. 2 is a system configuration diagram of the fingerprint matching device. FIG. 3 is a mechanical diagram of the fingerprint input unit in FIG. 1. FIG. 4 is a block diagram of the control section in FIG. 2.

FIG. 5 is a flowchart for explaining the above operation.

In FIG. 1, 1 indicates a fingerprint input section for the user of this fingerprint verification device to input an actual finger (actual loss), and 2 indicates an input section using a numeric keypad. This is used to enter personal conditions such as passwords, fingerprint selection codes, registration codes, and other various data. The input section 2 can be replaced with a function switch or the like instead of a numeric keypad. Reference numeral 3 indicates a verification result output section, which outputs verification results, various guidances, and the like. The verification result output unit 3 is a liquid crystal display (LCD) or CRT.

Consists of audio output or a combination of these. 4 is a mode setting for setting either the "registration mode" used when registering the user's fingerprint in advance or the "verification mode" used when matching the fingerprint when using this fingerprint matching device. 1 in this example.
! This is realized by (key). A combination of a card and a card reader that reads the card instead of a key,
Alternatively, a function button switch or the like can be used.

In FIG. 2, the fingerprint input section 1 is composed of a sensor section 11 and an AD conversion section 12. As shown in FIG. 3, the sensor unit 11 has an L[
EDlll, a prism 112 that receives light from the LEDlll and reflects the fingerprint pattern, and the prism 112
It is composed of a CCD image sensor 113 and the like that extracts a fingerprint image from the reflected light from the image sensor 113. The AD converter 12 converts the fingerprint image obtained by the sensor unit 11 into digital data. An input section (numeric keypad) 2, a verification result output section 3, a mode setting section 4, and a fingerprint input section 1 are connected to a control section 6 via an input/output interface 5. In this embodiment, the control unit 6 is realized by a microprocessor, and includes a CPU (including peripheral circuits) 6.
1, ROM 62, and RAM 63. The ROM 62 stores a program for fingerprint registration and verification, which will be described later. The RAM 63 is used to store user's fingerprint data, various parameters, and data.

The structure of the fingerprint input section 1 will be described with reference to FIG. The operating body 115 is normally closed to block input from a finger or other foreign object. A dirt removing section 40 is provided at the lower end of the operating body 115, and a magnet 11 is provided at the upper end of the operating body 115.
6 and its electromagnet 114 are provided. Operating body 1
A limit switch 3 is mounted on a support member 31 fixed to the substrate 30 behind the CCD image sensor 113 facing the sensor 15.
2 and a spring 33 are attached. The stain removal section 40 uses, for example, a polyester ultra-fine fiber cloth used for wiping the lenses of eyeglasses. The magnet 116 and the electromagnet 114 constitute the operating body stopper section 13. The operation of the fingerprint input unit 1 will be described later.

The control section 6 will be described with reference to FIG.

An acceptor input section 21 , a fingerprint input section 1 , and a mode setting section 4 are connected to the control section 6 . The acceptor input section 21 is replaced by the input section 2, ie, a numeric keypad, through which conditions of the acceptor are input. The fingerprint input section 1 includes a sensor section 11 and an operating body stopper section 13.

The verification result output section 3 is also connected as shown.

The control unit 6 is composed of the following means having the functions described below.

(a) Acceptor determination means 611 When acceptor conditions, such as a password, are input from the acceptor input section 21, it is determined whether or not it is registered in advance.

(b) Mode setting unit 612 Sets either “registration mode” or “verification mode” according to the setting operation from mode setting unit 4.

(c) Fingerprint data extraction means 613 Extracts the characteristic pattern from the fingerprint data from the sensor section 11 of the fingerprint input section 1.

(d) Electromagnet energizing means 614 Outputs an on/off signal for energizing or deenergizing the electromagnet according to the state of the limit switch 32.

(e) Fingerprint data storage means 631 for verification “registration mode”
This is a part of the RAM 63 that stores in advance the reference fingerprint data of a specific person for verification obtained in .

(v) Verification means 615 In the "verification mode", the actual fingerprint data from the fingerprint input section 1 and the fingerprint data extraction means 613 is compared and verified with the fingerprint data from the fingerprint data storage means 631 for verification.

Referring to FIG. 5, the "verification mode" of the fingerprint verification device
Let's talk about. It is assumed that the reference fingerprint data is registered in advance in the verification fingerprint data storage means 631 in the "registration mode".

Step 5OOI-3OO4 The user sets the mode setting section 4 to "verification mode" using a predetermined key. In response to this setting operation, the mode setting means 612 sets the inside of the control unit 6 to the "verification mode" (SOOI).

Then, the user inputs the password via the authorized person input section 21. The acceptor determining means 611 determines whether the input password is registered in advance (S
nO2). If there is no match, it will be tried again. However, if no result is found even after retrying a predetermined number of times, an error is output from the matching result output unit 3 (not shown).

Further, the user inputs a fingerprint selection code, that is, a "finger code" corresponding to a finger for verification, via the numeric keypad 2 (SnO4).

Steps 5OO5-3OO9 Based on the input password and finger code, the corresponding fingerprint data for verification in the fingerprint data storage means 631 is sent to the verification means 61-5 (SnO5).

When the acceptor determining means 611 determines that the input password is that of an authorized user, the energizing means 6
14, the electromagnet 114 is deenergized and turned off (S
nO2). As a result, when the user presses the operating body 115 in FIG. 3 with a finger, the operating body 115 can be pushed toward the limit switch 32 against the biasing force of the spring 33.

When the operating body 115 is pushed in and comes into contact with the limit switch 32 , the operating body stopper portion 13 outputs an on (close) signal to the biasing means 614 .

The fingerprint of the finger pressing the operating body 115 is input (SOO
7L Characteristic parts of the fingerprint input image data when the limit switch 32 is turned on are extracted (S
nO9).

Step 5OLO-3O13 The collation means 615 compares and collates the fingerprint data registered in advance and the fingerprint data input as above (
SOLO). The matching result is sent to the matching result output section 3,
It is output from the matching result output unit 3 (SO13). If the user pulls his/her finger during this time, the limit switch 32 is turned off (SOII), and the electromagnet energizing means 614 is activated to the electromagnet 114.
is energized (turned on) (SO12). As a result, the user's finger is pushed out together with the operating body 115.

As described above, first, since the fingerprint is input at a fixed position, the reading accuracy of the fingerprint input is improved. Next, when inputting a fingerprint, the finger is not forced to be placed in a predetermined position, but the finger is forced to press the operating body 115, so the pressing force of the finger is uniformized and reading accuracy is improved. At the same time, the operability for the user is also improved.

Further, the optical system portion of the fingerprint input unit 1 is isolated from the outside by the operating body 115 when not in use, and is not easily affected by dust and the like. Further, since the operating body 115 can be operated after confirming that the user is the authorized user, the optical system will not be damaged by mischief or the like. When a finger pushes the operating body 115, it automatically passes through the dirt removal section 40, so dirt adhering to the finger is removed in advance, preventing the optical system from becoming dirty, making maintenance easier, and improving reading accuracy. No decrease occurs either.

A second embodiment of the fingerprint matching device of the present invention will be described with reference to FIG. 6.7. In this embodiment, the operating body 115 of the operating body stopper 13 of the fingerprint input unit 1 is electrically operated, and the control unit 6 is replaced with the electromagnet urging means 614 shown in FIG. 4 as shown in FIG. 6. A motor-driven manual 616 is used. As shown in the flowchart of FIG. 7, if it is determined that the person is an acceptable person (SOO3), the electromagnet 114 is deenergized (turned off).
SOO6), the motor driving means 616 moves the operating body 115 on which the finger is placed via the motor (SO21). After reading and verifying the fingerprint, the motor drive unit 616 drives the motor to return the operating body 115 to its original position (
SO22). Thereafter, the electromagnet 114 is energized (turned on) (3013) and closes the real finger insertion opening again.

A description of the motor drive mechanism of the fingerprint input unit 1 has been omitted.

A third embodiment of the fingerprint matching device of the present invention will be described with reference to FIGS. 8-11.

In FIG. 8, an operating body 117 is rotatable upward, and a magnet 116 is attached to this operating body 117. When the operating body 117 rotates, it tightens a clockwork spring (not shown) attached to the shaft 118. When the operating body 117 rotates to a predetermined position, the cover plate 1
The electromagnet 114 attached to the electromagnet 20 is energized (turned on), and the operating body 117 is fixed thereto. The electromagnet 114 constitutes the fixed part 14 of the operating body. The operating body 117 is connected to the operating body stopper portion 1 along with the magnet 116 and the electromagnet 119.
3, which normally blocks the finger input section. Reference numeral 50 denotes a dirt removal unit that removes dirt from the prism 112 and the prong fingers by using a cartridge-type carbon dioxide
2) The valve of the compressor is opened so that carbon dioxide gas is introduced into the fingerprint input section 1 for a predetermined period of time.

FIG. 9 shows the configuration of the fingerprint matching device. The fingerprint input section 1 is
In addition to the sensor section 11 and the operating body stopper section 13, the operating body fixing section 14 is included. The control unit 6 is provided with a timer 617 including a first timer 617A and a second timer 617B.

The verification mode will be described with reference to the flowchart in FIG.

Steps 5OOI-3OO5 are the same as described above.

Steps 5O31-3O37 When it is determined that the acceptor is legitimate, the operating body stopper section 13 is released (SO31). The user is axis 11
The operating body 117 is rotated about a shaft 118 against the biasing force of a clockwork spring attached to the shaft 118.

When the operating body 117 is rotated to a predetermined position, the operating body 1
17 is fixed by an energized electromagnet 114. At this time, carbon dioxide gas is introduced into the fingerprint input section 1 from the stain removal section 5o.

When the operating body fixing section 14 is turned on, the first clocking means 617
A sets time t1 and starts timing.

During the above period, fingerprint input and fingerprint data extraction are performed in the same manner as described above (SO32, 5O34). The extracted fingerprint data is sent to verification means 615.

When the time t1 has elapsed, the electromagnet 114 of the operating body fixing portion 14 is turned off, and the operating body 117 returns to its original position due to the biasing force of the clockwork spring.

Steps 5OO8-3O40 The second timer 617B sets the second time t2 and starts timekeeping. When the time t2 has elapsed, the electromagnet 1
19 is energized. As a result, the operating body 117 is fixed at the original position and closes the finger insertion opening.

Steps 5O41 and 5O42 Similarly to the above, comparison and verification and the results are output.

Still another embodiment of the fingerprint input unit 1 is shown in FIGS. 11(a) to 11(C). FIG. 11(a) is a sectional view of the fingerprint input unit 1, FIG. 11(b) is a front view of the operating body 121, and FIG.
C) is a plan view of FIG. 11(a). The operating body 121 of this fingerprint input section is different from the one shown in FIG. 8, and is transparent, and is rotatable downward about a shaft 118 as shown in the figure. A magnet 122 is attached to the back surface of the operating body 121. An operating body stopper portion 123 is provided as a fixing means. Electromagnets 124 constituting the operating body fixing section 14 are provided on both sides of the prism 112. Behind the CCD 113, there is a container 61 containing compressed air, a container valve 62 that opens and closes based on an electrical control signal from the control section 6, and the compressed air from the container 61 is introduced into the fingerprint input section 1. A dirt removal section 60 is provided, which is comprised of a conduit 63 for removing dirt. Remove dirt with compressed air. Place your finger on the operating body 121 and press the operating body 1.
21, the fingerprint is read through the transparent operating body 121A. The rotational operation of the operating body 121 and the operation of the magnet are the same as those shown in FIG.

The operating body fixing part 14 can be removed. At this time,
The biasing force of the clockwork spring 118A is set to such a magnitude that the pressure of the user's finger is applied when pressing the operating body 121 to input a fingerprint.

A mechanism for removing dirt from the fingers may also be provided.

In the embodiments described above, fingerprint data for reference comparison, passwords, etc. may be stored in an IC card, and the IC card may be used.

When carrying out the present invention, the above-described embodiments can be combined in various ways, and various modifications can also be made.

〔Effect of the invention〕

As described above, according to the present invention, first, the fingerprint input is performed accurately, so that the reading accuracy of the fingerprint input is improved. Next, when entering a fingerprint, the finger is not forced to be placed in a predetermined position, but rather by the inevitable movement of pressing the operating body, which equalizes the pressing force of the finger and improves reading accuracy. , user operability is also improved. Furthermore, the optical system part of the fingerprint input section is isolated from the outside by the operating body when not in use, and is less susceptible to the effects of dust and the like. In addition, the operating object is an acceptor.
! Since the optical system can be operated after being recognized, the optical system will not be damaged due to mischief or the like.

The dirt removed from the finger is automatically removed in advance by the dirt removal unit, so that the optical system is not contaminated (maintenance is easy and reading accuracy does not deteriorate).

[Brief explanation of the drawing]

FIG. 1 is a plan view of the operation panel section of a fingerprint verification device as an embodiment of the present invention, FIG. 2 is a system configuration diagram of the fingerprint verification device, and FIG. 3 is a mechanical diagram of the fingerprint input section in FIG. 1. , FIG. 4 is a block configuration diagram of the control unit in FIG. 2, FIG. 5 is a flowchart for explaining the above operation, and FIG. 6 is a system configuration diagram of a fingerprint matching device according to a second embodiment of the present invention. , FIG. 7 is a flowchart for explaining the operation of FIG. 6, FIG. 8 is a configuration diagram of a fingerprint input unit in a fingerprint verification device according to a third embodiment of the present invention, and FIG. 9 is a diagram of a third embodiment of the present invention. FIG. 10 is a flowchart for explaining the operation of the third embodiment, and FIG. 11 is a block diagram of the control unit of the fingerprint matching device. 4 is a configuration diagram of the fingerprint input unit of the embodiment shown in FIG. 4; FIG. (Explanation of symbols) 1... Fingerprint input section, 2... Input section, 3...
Verification result output unit, 4...Mode setting unit, 6...Control unit, 32...Limit switch, 33...
・Spring, 40... Dirt removal part, 115, 1
17.121... Operating body, 111... LED,
112... Prism, 113... CCD image sensor. (c) Figure 11

Claims (1)

[Claims] 1. An acceptor input unit (21) for inputting predetermined acceptor conditions, a fingerprint input unit (1) for inputting fingerprint data by scanning an actual finger, and an acceptor input unit (1) for inputting predetermined acceptor conditions; a verification fingerprint data storage means (631) for storing the fingerprint data stored in the verification data; and a verification means (631) for comparing and verifying the actual fingerprint data from the fingerprint input section and the registered fingerprint data from the verification fingerprint data storage means. 615), wherein the fingerprint input section is an operating body (115, 117, 121).
The operating body isolates the inside of the fingerprint input unit from the outside when not in operation, and the operating body operates only when the accepter conditions input in the accepter input unit match predetermined conditions. A fingerprint identification device characterized in that it is configured to be movable. 2. The fingerprint input unit is connected to a container (61) containing compressed gas.
), an on-off valve (62) for the container, and a compressed gas conduit (6
3), and is configured to introduce compressed gas into the fingerprint input section. 3. The fingerprint input section includes a dirt removal section (40),
3. The fingerprint verification device according to claim 1, wherein the fingerprint verification device is configured to remove dirt adhering to the finger.