JPH0660170A - Fingerprint collection device - Google Patents

Abstract

PURPOSE:To provide the fingerprint collection device with excellent reproducibility. CONSTITUTION:A fingerprint section is located at a prescribed position and pressed by a prescribed pressure to pickup and collect a fingerprint 401. That is, when a finger sensor 4 senses the insertion of a finger 40 to a finger insert body 1 a piston 31 rises and when a pressure sensor 5 detects the prescribed pressure, the piston 31 is stopped and the finger 40 is pressed to a fingerprint contact base 2, and the fingerprint 401 is collected by a way of photoelectric engineering.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fingerprint collecting device for collecting a fingerprint of a finger of a person to be sampled by optoelectronic engineering.

[0002]

2. Description of the Related Art Conventionally, the fingerprint side of a finger is pressed against the inclined surface of a right-angle prism, light is projected from one end surface side, and the reflected light totally reflected by the inclined surface is captured on the other end surface side, and the collected person There is known a fingerprint collecting device for collecting the fingerprint of the finger of the person by opto-electrical engineering.

[0003]

However, in the above-mentioned conventional fingerprint collecting device, when the pressing pressure on the slope of the finger is too strong, the fingerprint is deformed or crushed to cause bleeding of the fingerprint ridge, and the fingerprint ridge is accurately reflected. If it is not collected and is too weak, fingerprint ridges will be blurred and the reproducibility of the fingerprint image will be low, and since the user himself puts his finger on the prism, the contact area between the prism and the finger cannot be fixed in position. However, in order to maintain the reproducibility of the fingerprint image range, it is necessary for the user to get used to it, and there is a problem that it is difficult to obtain a reproducible fingerprint image. An object of the present invention is to provide a fingerprint collection device having excellent fingerprint reproducibility.

[0004]

[Means for Solving the Problems] In order to solve the above problems,
The present invention has a fingerprint contact portion located on the fingerprint side of a finger and a finger stop portion located on the fingernail side of the finger, and one or both of the fingerprint contact portion and the finger stop portion are arranged in a finger holding direction. Relative to
A predetermined pressure is applied between the fingerprint contact portion and the finger stop portion, and the contact area between the prism and the finger is fixedly positioned to pick up the fingerprint by opto-electrical engineering.

[0005]

[Effects and Effects of the Invention] One or both of the fingerprint contact portion and the finger stop portion are moved relative to each other in the finger gripping direction to obtain the fingerprint contact portion.
-A predetermined pressure is applied between the finger stoppers, and the contact area between the prism and the finger is fixed in position to collect fingerprints by optoelectronic engineering. For this reason, the finger is uniformly pressed against the fingerprint contact portion, so that the fingerprint is not deformed or crushed, the bleeding or blurring of fingerprint ridges does not occur as a fingerprint image, and the range of the fingerprint image is determined. Since the fingerprint image has high reproducibility, a constant mapping range can be obtained without making the user conscious of the mapping range, and an accurate and highly reproducible fingerprint image can be obtained. .

[0006]

EXAMPLE An example of the present invention will be described with reference to FIG.
The fingerprint collecting device A includes a finger insert 1 which is a finger stopper, a fingerprint contact base 2 which is a fingerprint contact, an actuator 3 which moves the fingerprint contact base 2 up and down, and a finger sensor which detects insertion of a finger 40. 4, a pressure sensor 5 that measures the pressure applied to the fingerprint contact base 2, and a fingerprint collection unit 6 that collects a fingerprint 401.
And a controller 7 for controlling the actuator 3, a registration unit 8 for storing the collected fingerprint, and a collation unit 9 for collating the fingerprint 401.

A finger insert body having an inverted U-shaped cross section, which is fixed on the fingerprint collection hole 101 of the housing 100 having a fingerprint collection hole 101 (rectangular) formed on the upper surface and which can be inserted and removed by a finger 40 (right index finger). Reference numeral 1 denotes a first portion of the finger 40, which is made of plastic or the like that has a non-translucent property and is difficult to deform.
The size is such that the joints can be loosely inserted.

The fingerprint contact base 2 which can penetrate the fingerprint collecting hole 101 is a slope of a right-angle prism (not shown) and is disposed above the fingerprint collecting portion 6.

The actuator 3 has a mechanism capable of pushing the piston 31 upward by energization, stopping the piston 31, and returning the piston 31 to the lowest position.

The finger sensor 4 is arranged at the innermost portion of the finger insert 1 and sends a finger detection signal to the controller 7 while the tip of the finger 40 is touching.

The pressure sensor 5 sandwiched between the upper surface of the piston 31 and the fingerprint collecting portion 6 detects the pressure received by the fingerprint collecting portion 6, that is, the pressure acting between the fingerprint contact base 2 and the finger insert 1. It is detected and an electric output corresponding to the pressure is sent to the controller 7.

The fingerprint collecting unit 6 is a CCD element in which light is vertically projected from one end face side of the prism and the reflected light totally reflected by the inclined surface (fingerprint contact base 2) is arranged parallel to the other end face side. Captured and reflected light corresponding to the ridges of the fingerprint ridges is taken as a bright image and reflected light corresponding to the valleys of the fingerprint ridges is taken as a dark image, and monochrome gray-scale fingerprint data is transferred to the registration unit 8. To do.

When a finger detection signal is input from the finger sensor 4, the controller 7 energizes the actuator 3 so that the piston 31 pushes up, and an electric output corresponding to the optimum pressure for fingerprint acquisition is sent from the pressure sensor 5. Then, the power supply to the actuator 3 is stopped so that the piston 3 stops at the current position,
When the transfer completion signal is input from the registration unit 8, the piston 31
The actuator 3 is energized so that returns to the lowest position.
If the finger detection signal is interrupted before the optimum pressure is obtained, an error is notified by a buzzer or the like to prompt a retry.

The registration unit 8 includes a processing circuit for performing various arithmetic processes on the monochrome grayscale fingerprint data transferred by the CCD element of the fingerprint sampling unit 6, and a short-term storage unit for temporarily storing the processed fingerprint image data. A long-term storage unit for storing fingerprint image data of a plurality of registrants for a long time is provided, and a transfer completion signal is output to the controller 7 when the transfer of monochrome grayscale fingerprint data is completed.

The collation unit 9 collates the fingerprint image data temporarily stored in the short-term storage unit with the fingerprint image data of the registrant stored in the long-term storage unit and determines whether the person to be sampled is the same person as the registrant. Whether the result is verified or not, and the result is notified by a character, a lamp, a synthetic voice or the like.

The fingerprint collation device A of this embodiment has the following advantages. (A) When the finger 40 is inserted all the way into the finger insert 1 and the finger sensor 4 outputs a finger detection signal to the controller 7, the fingerprint contact base 2
Since the pressure rises and the optimum pressure for fingerprint collection is applied to the finger 40, the fingerprint 401 without deformation or crushing can be collected. Also,
Since the finger insert 1 has an inverted U-shaped cross-section, the inclination (front, back, left, right, diagonal) of the finger 40 is corrected as the fingerprint contact base 2 is raised, and fingerprints are collected in the same range. For this reason, the same fingerprint image data can be obtained from the same person to be sampled, and collation errors can be significantly reduced. (B) Due to the presence of the finger insert 1 and the finger 40, the person to be sampled does not see the operation of the fingerprint contact substrate 2 and the finger insert 1 does not move. The fingerprint 401 can be collected, and the user does not intentionally feel like disturbing the fingerprint image data.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a fingerprint matching device according to an embodiment of the present invention.

[Explanation of symbols]

 A Fingerprint collection device 1 Finger insert (finger stop) 2 Fingerprint contact base (fingerprint contact) 40 fingers

Claims (1)

[Claims] 1. A fingerprint contact part located on the fingerprint side of a finger, and a finger stop part located on the nail side of the finger, wherein one or both of the fingerprint contact part and the finger stop part are clamped by a finger. A fingerprint collecting device for optoelectrically collecting fingerprints by moving the fingerprints relative to each other in a predetermined direction so that a predetermined pressure is applied between the fingerprint contact portion and the finger stop portion.