Fingerprint anti-fake device based on skin resistance value measurement

Abstract

The utility model relates to a fingerprint anti-fake device based on skin resistance value measurement, which comprises a resistance measurement module for detecting human skin resistance and a fingerprint acquisition module for acquiring human fingerprints, and further comprises an effective fingerprint acquisition area for acquiring effective fingerprints, the fingerprint acquisition module comprises a fingerprint acquisition unit, and the detection electrode and the fingerprint acquisition unit are both arranged in the effective fingerprint acquisition area. The resistance measuring module is arranged to measure the skin resistance value of the fingerprint of the user to determine whether the fingerprint is real or not, the fingerprint module is arranged to collect the fingerprint of the user, the fingerprint recognition technology and the bioelectrical impedance technology are combined, the fingerprint can be effectively prevented from being forged or simulated, and the fingerprint recognition efficiency is improved. The fingerprint identification security and reliability are improved, the method can be suitable for an original hardware structure, and the application requirement of fingerprint counterfeiting prevention can be realized only by performing relatively small optimization and improvement on the original fingerprint identification equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of information security identity authentication, and more specifically to a fingerprint anti-counterfeiting device based on skin resistance value measurement. Background Art

[0002] At present, fingerprint recognition technology has been widely used in various fields, such as membership systems, access control systems, attendance systems, car start-up, safes, ultra-large capacity fingerprint identity authentication system solutions and financial payments. Although the security level of fingerprint recognition technology is high, fingerprints may be stolen, forged or simulated by illegal users. Therefore, a technology that can effectively prevent fingerprints from being forged or simulated is needed.

[0003] Existing fingerprint anti-counterfeiting methods often use a combination of multiple technologies for fingerprint recognition, such as infrared, capacitance, optics, blood oxygen sensor, heart rate sensor and other technologies to improve the accuracy and reliability of fingerprint recognition. However, the above methods have high hardware manufacturing costs and manufacturing process requirements, and the subsequent optimization is more difficult if the fingerprint matching algorithm is added. It cannot well solve the various application requirements of fingerprint anti-counterfeiting. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a fingerprint anti-counterfeiting device based on skin resistance value measurement in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A fingerprint anti-counterfeiting device based on skin resistance value measurement is constructed, including a resistance measurement module for detecting human skin resistance and a fingerprint collection module for collecting human fingerprints, and also including an effective fingerprint collection area for performing effective fingerprint collection, the resistance measurement module includes a detection electrode, the fingerprint collection module includes a fingerprint collection unit, and the detection electrode and the fingerprint collection unit are both arranged in the effective fingerprint collection area.

[0007] Preferably, the detection electrode is arranged outside the fingerprint collection unit.

[0008] Preferably, the resistance measurement module further comprises a multi-segment conductive frame arranged in the effective fingerprint collection area, the multi-segment conductive frame is arranged outside the fingerprint collection unit, and the detection electrodes are correspondingly arranged on each frame segment of the multi-segment conductive frame.

[0009] Preferably, the multi-section conductive frame is composed of at least two frame segments, and the multi-section conductive frame is a metal frame.

[0010] Preferably, the detection electrode is arranged inside the fingerprint collection unit.

[0011] Preferably, the resistance measurement module comprises measurement contacts arranged on the fingerprint acquisition unit, the number of the measurement contacts is at least two, and the measurement contacts constitute the detection electrodes.

[0012] Preferably, the detection electrodes are arranged both outside and inside the fingerprint acquisition unit, and the detection electrodes outside and inside together constitute a detection electrode group.

[0013] Preferably, it also includes a PCBA board electrically connected to the resistance measurement module and the fingerprint recognition module, and the PCBA board determines whether the collected skin resistance value is within a preset skin resistance value range.

[0014] Preferably, it further comprises a mounting bracket and a cover plate arranged at the bottom of the mounting bracket, and the PCBA board is arranged on the mounting bracket.

[0015] The beneficial effects of the utility model are:

[0016] The utility model sets an effective fingerprint collection area for effective fingerprint collection on the device, sets a resistance measurement module in the effective fingerprint collection area, measures the skin resistance value while identifying the user's fingerprint, so as to determine whether the fingerprint is authentic, sets the fingerprint module to collect the user's fingerprint, and limits the detection process to one area by setting the effective fingerprint collection area, and detects the skin resistance while identifying the fingerprint in this area, thereby reducing the loopholes and hidden dangers in the detection logic, and combines the fingerprint recognition technology and the bioelectrical impedance technology, so as to effectively prevent the fingerprint from being forged or simulated, improve the security and reliability of fingerprint recognition, and can be applicable to the original hardware structure.

[0017] At the same time, this device is combined with the existing fingerprint structure design, without changing the original hardware structure, only a small optimization and improvement of the original fingerprint recognition equipment can be made to meet the application requirements of fingerprint anti-counterfeiting, and the device can be used, thereby greatly improving the application security of fingerprint recognition technology, effectively reducing the manufacturing cost of the previous fingerprint recognition in anti-counterfeiting technology and the cost investment in manufacturing process, and can be applied in many fields. Such as membership system, access control system attendance system, car start, safe, large-capacity fingerprint identity authentication system solution and financial payment, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0019] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the utility model;

[0020] Figure 2 This is a fingerprint module circuit diagram of a preferred embodiment of the utility model;

[0021] Figure 3 This is a resistance measurement circuit diagram of a preferred embodiment of the utility model;

[0022] Among them: 1-PCBA board, 2-fingerprint collection unit, 3-multi-section conductive frame, 4-measuring contact, 5-mounting bracket, 6-cover plate. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be combined with the technical solution in the embodiments of the utility model for a clear and complete description. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The preferred embodiment of the utility model is as follows Figure 1 As shown, a fingerprint anti-counterfeiting device based on skin resistance value measurement includes a resistance measurement module for detecting human skin resistance and a fingerprint collection module for collecting human fingerprints, and also includes an effective fingerprint collection area for collecting effective fingerprints, the resistance measurement module includes a detection electrode, the fingerprint collection module includes a fingerprint collection unit 2, and the detection electrode and the fingerprint collection unit 2 are both arranged in the effective fingerprint collection area. It also includes a PCBA board 1 electrically connected to the resistance measurement module and the fingerprint recognition module, and the PCBA board 1 determines whether the collected skin resistance value is within a preset skin resistance value range.

[0025] The fingerprint acquisition unit 2 and the PCBA board 1 can be an integrated structure or a split structure. The device further comprises a mounting bracket 5 and a cover plate 6 disposed at the bottom of the mounting bracket 5 , and the PCBA board 1 is disposed on the mounting bracket 5 .

[0026] There are many implementation methods for the detection electrode, including: 1. It is set outside the fingerprint collection unit, specifically through a multi-segment conductive frame 3 set in the effective fingerprint collection area and the outer edge of the fingerprint collection unit 2, and the detection electrode is correspondingly set on each frame segment of the multi-segment conductive frame, wherein the multi-segment conductive frame 3 can be designed as a segmented type of 2 or more equal or unequal segments, and its shape includes but is not limited to circular, square, polygonal, etc. The multi-segment conductive frame 3 is composed of at least two segments, and the multi-segment conductive frame 3 is a metal frame, and the multiple segments are combined in pairs to collect the skin resistance value. 2. The detection electrode is set inside the fingerprint collection unit 2, through a plurality of measurement contacts 4 set on the fingerprint collection unit, and the plurality of measurement contacts 4 are evenly set, and the measurement contacts 4 constitute the detection electrode. When the number of the measurement contacts 4 is greater than two, the plurality of measurement contacts 4 are combined in pairs to collect the skin resistance value. 3. The detection electrodes are arranged both outside and inside the fingerprint collection unit 2, and the detection electrodes outside and inside together constitute a detection electrode group.

[0027] like Figure 2 , 3 As shown, the Qs808 control chip in the fingerprint module circuit diagram is connected to the SGM8907 in the resistance measurement circuit diagram through the F_R_DET1 pin (19). In the resistance measurement circuit diagram, M- and M+ are measurement points, which can also be set as multiple measurement points. The MCU is connected to the fingerprint sensor (fingerprint acquisition unit) through the GPIO, which also includes the QM301 touch chip. The basic principle of resistance measurement is the resistance value between two measurement points. For the preset skin resistance value range, it can be set according to the user's age, gender, weight and other factors. In consideration of the differences in human body and the different sizes of fingers, a suitable range is selected to improve the accuracy of recognition.

[0028] However, under daily circumstances, the values ​​of the two measurement points of the finger skin will have regional differences, resulting in excessive deviation in the measured data. Therefore, the resistance measurement implementation method can simultaneously set detection electrodes on the outside and inside of the fingerprint acquisition unit, that is, detection electrodes are set in the fingerprint acquisition unit 2 and the multi-segment conductive frame 3 respectively, for double detection, or multiple measurement points are designed in the sensor and the metal frame, which has better performance in application and usage experience. The two monitoring points can verify each other, or they can be monitored separately to ensure the accuracy of the monitored data.

[0029] The utility model sets an effective fingerprint collection area for effective fingerprint collection on the device, sets a resistance measurement module in the effective fingerprint collection area, measures the skin resistance value while identifying the user's fingerprint, so as to determine whether the fingerprint is authentic, sets the fingerprint module to collect the user's fingerprint, and limits the detection process to one area by setting the effective fingerprint collection area, and detects the skin resistance while identifying the fingerprint in this area, thereby reducing the loopholes and hidden dangers in the detection logic, and combines the fingerprint recognition technology and the bioelectrical impedance technology, so as to effectively prevent the fingerprint from being forged or simulated, improve the security and reliability of fingerprint recognition, and can be applicable to the original hardware structure.

[0030] At the same time, this device is combined with the existing fingerprint structure design, without changing the original hardware structure, only a small optimization and improvement of the original fingerprint recognition equipment can be made to meet the application requirements of fingerprint anti-counterfeiting, and the device can be used, thereby greatly improving the application security of fingerprint recognition technology, effectively reducing the manufacturing cost of the previous fingerprint recognition in anti-counterfeiting technology and the cost investment in manufacturing process, and can be applied in many fields. Such as membership system, access control system attendance system, car start, safe, large-capacity fingerprint identity authentication system solution and financial payment, etc.

[0031] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A fingerprint anti-counterfeiting device based on skin resistance measurement, characterized in that: The invention comprises a resistance measuring module for detecting the resistance of human skin and a fingerprint collecting module for collecting human fingerprints, and also comprises an effective fingerprint collecting area for collecting effective fingerprints, wherein the resistance measuring module comprises a detection electrode, and the fingerprint collecting module comprises a fingerprint collecting unit, wherein the detection electrode and the fingerprint collecting unit are both arranged in the effective fingerprint collecting area; the detection electrode is arranged outside the fingerprint collecting unit; the resistance measuring module also comprises a multi-segment conductive frame arranged in the effective fingerprint collecting area, wherein the multi-segment conductive frame is arranged outside the fingerprint collecting unit, and the detection electrode is correspondingly arranged on each frame segment of the multi-segment conductive frame.

2. A fingerprint anti-counterfeiting device based on skin resistance measurement according to claim 1, characterized in that: The multi-section conductive frame is composed of at least two frame segments, and the multi-section conductive frame is a metal frame.

3. A fingerprint anti-counterfeiting device based on skin resistance value measurement according to any one of claims 1-2, characterized in that: It also includes a PCBA board electrically connected to the resistance measurement module and the fingerprint recognition module, and the PCBA board determines whether the collected skin resistance value is within a preset skin resistance value range.

4. A fingerprint anti-counterfeiting device based on skin resistance measurement according to claim 3, characterized in that: It also includes a mounting bracket and a cover plate arranged at the bottom of the mounting bracket, and the PCBA board is arranged on the mounting bracket.

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