WO2013067661A1 - 一种双指、单指和滚动指纹的采集、登记与识别装置 - Google Patents
一种双指、单指和滚动指纹的采集、登记与识别装置 Download PDFInfo
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- WO2013067661A1 WO2013067661A1 PCT/CN2011/001940 CN2011001940W WO2013067661A1 WO 2013067661 A1 WO2013067661 A1 WO 2013067661A1 CN 2011001940 W CN2011001940 W CN 2011001940W WO 2013067661 A1 WO2013067661 A1 WO 2013067661A1
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- Prior art keywords
- finger
- fingerprint
- lens
- optical
- optical path
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
Definitions
- the present invention relates to a method or apparatus for fingerprinting using an electronic circuit, and more particularly to a device for collecting, registering and recognizing a two-finger, single-finger and rolling fingerprint.
- the fingerprint identification technology has the characteristics of convenience, reliability, non-infringement and low cost.
- the user fingerprint data is distributed to the corresponding fingerprint verification device, and the fingerprint compression record can be uploaded in real time to generate a fingerprint press report, which provides a basis for tracing the accident.
- the size of the acquisition window of the existing optical fingerprint collection device has not been met.
- the size of the living scroll or two-finger fingerprint collection window must be greater than 1.6 X in accordance with the Chinese Public Security Department and the Federal Bureau of Investigation (FBI). 1.5 inches, image resolution is 500dpi ⁇ l%, gray level is 256gray ⁇ level, and the fingerprint image acquisition speed, the chips used are small package, the length of the optical system is reduced, and modularization is adopted for carrying. Further improvement.
- the technical problem to be solved by the present invention is to make up for the above-mentioned drawbacks of the prior art, and to provide a device for collecting, registering and recognizing a double finger, a single finger and a rolling fingerprint.
- the apparatus for collecting, registering and recognizing two-finger, single-finger and rolling fingerprints includes a fingerprint collector, a backlight unit, an indicating unit and a protective panel, that is, a casing.
- the fingerprint collector is an optical two-finger fingerprint collector including an optical fingerprint image acquisition unit
- the optical fingerprint image acquisition unit includes a belt a circuit control module and an optical system of the memory unit chip, wherein the circuit control module and the optical system are used for real-time acquisition and comparison of two fingers, a single finger and a rolling fingerprint of the index finger and the middle finger
- the memory unit chip is used for storing Function file to complete registration and identification after collection.
- the circuit control module further includes a complementary metal-oxide-semiconductor (Complementary Metal-Oxide-Semiconductor) for acquiring an image of at least 850,000 pixels.
- a CMOS sensor a control chip that controls the CMOS sensor to complete image data acquisition, a crystal oscillation circuit that provides a clock signal to the main control chip, an encryption chip, a step-down integrated circuit, and a data communication unit that communicates with the computer for data transmission,
- the data communication unit is used in conjunction with a computer to complete user fingerprint collection and comparison.
- the main control chip is a main control chip of the model CY7C68013A produced by the Cypress Semiconductor Company of the United States, and has a dual-finger fingerprint acquisition unit, a data communication unit, a data storage unit and an output control unit, and the main control chip and the CMOS respectively
- the sensor, the encryption chip, the memory unit chip, the step-down integrated circuit, the indication unit, the crystal oscillation circuit, and the data communication unit are connected to implement two-finger fingerprint acquisition, two-finger fingerprint image correction, data communication, and output control.
- the CMOS sensor is a 1.3 megapixel black and white CMOS sensor of the model MT9M001C12STM produced by Aptina Corporation of the United States, and is controlled by a clock signal, a reset signal, a synchronization signal and an I 2 C signal provided by the main control chip, and the collected data is collected. Directly transferred to the master chip.
- the encryption chip is a model produced by Shenzhen Huashengda Technology Co., Ltd.
- DM2016N's encryption chip used to download its own software algorithms and code, provides comprehensive, high-security protection for important user data, protects its own rights and interests, and avoids software piracy.
- the memory unit chip uses a memory chip of the type AT24C64CN-SH-B (64K).
- the data communication unit includes a Universal Serial Bus (USB) connector with static protection, is disposed on the rear side of the casing, and is provided with a waterproof and dustproof rubber cover.
- USB Universal Serial Bus
- the USB connector is a 12-pin dual-row USB socket that is used with a 12-pin dual-row USB male connector on both ends.
- the optical system includes a right angle trapezoidal prism, a plano-convex lens, two planar mirror surfaces, and a lens system;
- the right-angled trapezoidal prism is placed on the upper side of the light source in the direction of the optical path, and the lower bottom surface of the right-angled trapezoidal prism is a working surface, and the right-angled waist of the right-angled trapezoidal prism emits a fingerprint image, and the right-angled trapezoidal prism is disposed below There is a motherboard of the optical fingerprint image acquisition unit.
- the plano-convex lens is placed in front along the direction of the optical path.
- the two plane mirror surfaces are arranged along the optical path direction, respectively forming an angle of 45° and 135° with the right angle side of the right angle trapezoidal prism, and forming an angle of 45° with the horizontal plane to accurately reflect the light to the setting.
- CMOS photoelectric conversion of images acquired on the phase plane of the imaging objective of the lens system The two planar mirror surfaces are used to extend the optical path to make the device more compact.
- the lens system includes an imaging objective lens and an eyepiece, which are sequentially disposed along the optical path direction, and include a lenticular lens, a first meniscus lens, and a second meniscus lens.
- the total length of the optical path is adjusted from 240mm to 280mm, and the total length of the optical path in the right-angled trapezoidal prism is 110mm ⁇ 130mm.
- the total length of the optical path in the plano-convex lens is 7mm ⁇ 9mm, and the total length of the optical path in the lenticular lens is 0.8mm ⁇ 1.5mm.
- the total length of the optical path in the first meniscus lens is adjusted from 0.5 mm to 1.0 mm, and the total length of the optical path in the second meniscus lens is adjusted from 6.5 mm to 7.5 mm.
- the specific value is determined according to the object distance and the image distance of the lens material, and the right angle trapezoidal prism, The pitch of the plano-convex lens, the lenticular lens, the first meniscus lens, and the second meniscus lens is adjusted according to the image quality.
- the indication unit includes an indicator light and a buzzer that are directly connected to the main control chip, respectively.
- the indicator light is a light emitting diode (LED) indicator, which is controlled by a main control chip of the circuit control module.
- the LED light source is a light-emitting diode of different color visible light, and is on the outer casing.
- a light guide column having uniform brightness is disposed on the surface, and the power source and the ground are respectively supplied and grounded from the main board of the optical fingerprint image acquisition unit through wires according to the value of the illumination intensity and the illumination mode.
- the buzzer is disposed on one side of the casing, and is subjected to various control by the control chip of the circuit control module to make the human-computer interaction simpler.
- the outer casing is generally in the shape of a rectangular parallelepiped, and the upper surface of the front surface of the outer casing is provided with a rectangular opening for use as a fingerprint collecting window, and is provided with a concave curved surface, and the base of the outer casing is a thickened and elongated rubber base, and the outer casing is The base is further provided with a rubber foot pad to increase the anti-slip area to prevent fingerprint deformation when the fingerprint is pressed and the device to slide or even dump.
- the length, width and height of the outer casing are adjusted according to the volume of the optical system.
- the size of the fingerprint collection window is larger than 1.6X 1.5 inches, that is, the area of the CMOS sensor is larger than 1.6 X 1.5 inches, which is in line with the requirements of the Chinese Public Security Department and the US FBI.
- the concave curved surface has a curvature varying from a 0.4 rad to +0.4 rad for the user to press the finger.
- the rear side of the outer casing is provided with a locking hole reinforced with a steel structure, and is engaged with a T-shaped buckle of a burglar lock using a wire lock cable, and the device is locked in a fixed position or centered on the locked position.
- the wire lock cable has a radius of movable space to prevent theft.
- the two sides of the outer casing are provided with a plurality of parallel anti-slip strips for anti-slip and anti-slip decoration.
- the anti-slip strip has a width of 1 mm, a depth of 0.8 mm, and a length of 3 to 110 mm.
- the backlight unit includes an LED backlight board that uniformly distributes an infrared diode having a wavelength of 850 nm or 940 nm, and an external potentiometer for adjusting brightness of the LED backlight panel, and the backlight unit is installed directly under the right angle trapezoidal prism.
- the light collecting the fingerprint image information is presented in the image acquisition unit photosensitive array and converted into an electrical signal.
- the invention adopts a modular design to assist in improving management strength and reliability, and the optical system, the circuit control module and the outer casing have the characteristics of miniaturization, and overcome the defects of the existing double-finger fingerprint collection device of the same type, thereby further It saves costs and is easy to carry.
- the invention can be combined with a computer to complete the functions of user's two-finger fingerprint collection, two-finger fingerprint comparison, abnormal alarm, control signal output, etc., which effectively improves the fingerprint collection rate and recognition accuracy.
- Figure 1 is a front elevational view of a housing in accordance with an embodiment of the present invention.
- Figure 2 is a side elevational view of the outer casing of the embodiment of the present invention.
- Figure 3 is a plan view of the outer casing of the embodiment of the present invention.
- FIG. 4 is a block diagram showing the composition of an optical fingerprint image acquisition unit according to an embodiment of the present invention
- FIG. 5 is a two-dimensional view of an optical path of an optical system according to an embodiment of the present invention.
- Figure 6 is a flow chart showing the operation of an embodiment of the present invention.
- the fingerprint collector is an optical two-finger fingerprint collector including an optical fingerprint image acquisition unit.
- the optical fingerprint image acquisition unit includes a circuit control module with a memory unit chip 10 and an optical system.
- the circuit control module and the optical system are generally used for the index finger and the middle finger.
- the real-time acquisition and comparison of the two fingers, the single finger and the rolling fingerprint, the storage unit chip 10 is used to store the function file, so as to complete the registration and identification after the acquisition.
- the circuit control module further includes a CMOS sensor 8 for acquiring an image, a main control chip 7 for controlling the CMOS sensor 8 to complete image data acquisition, a crystal oscillation circuit 13 for providing a clock signal to the main control chip 7, an encryption chip 9, and a step-down integrated circuit. 11, and communicate with the computer
- the data communication unit 14 of the data transmission, the data communication unit 14 is used in conjunction with the computer to complete user fingerprint collection and comparison.
- the main control chip 7 is the main control chip of the model CY7C68013A produced by the Cypress Semiconductor Company of the United States. It has a two-finger fingerprint acquisition unit, a data communication unit, a data storage unit and an output control unit.
- the main control chip 7 and the CMOS sensor 8 are respectively encrypted.
- the chip 9, the memory cell chip 10, the step-down integrated circuit 11, the indicating unit 12, the crystal oscillating circuit 13, and the data communication unit 14 are connected for implementing two-finger fingerprint acquisition, two-finger fingerprint image correction, data communication, and output control.
- the encryption chip 9 is an encryption chip of the model DM2016N produced by Shenzhen Huashengda Technology Co., Ltd., which is used to download its own software algorithms and codes, and provides comprehensive and high-security protection for important data of users and safeguards their own rights and interests. Avoid software piracy.
- the memory cell chip 10 is a memory chip of the type AT24C64CN-SH-B (64K) and is controlled by the main control chip 7.
- the CMOS sensor 8 is a 1.3 megapixel black and white CMOS sensor of the model MT9M001C12STM produced by Aptina Corporation of the United States.
- the main control chip 7 provides clock signals, reset signals, synchronization signals and I 2 C signals for control. The collected data is directly transmitted to the main controller. Control chip 7.
- the data communication unit 14 includes a USB connector 4 with electrostatic protection, which is disposed on the rear side of the casing and is provided with a waterproof and dustproof rubber cover.
- the USB connector is a 12-pin dual-row USB socket that is used with a 12-pin dual-row USB male connector on both ends.
- the optical system includes a right-angled trapezoidal prism 17, a plano-convex lens 18, two planar mirror surfaces 15, 16 and a lens system;
- the right-angled trapezoidal prism 17 is placed on the upper side of the light source in the direction of the light path, and the lower bottom surface of the right-angled trapezoidal prism 17 is a working surface, and the right-angled waist of the right-angled trapezoidal prism 17 emits a fingerprint image; the optical fingerprint image is arranged below the right-angled trapezoidal prism 17
- the motherboard of the acquisition unit is placed on the upper side of the light source in the direction of the light path, and the lower bottom surface of the right-angled trapezoidal prism 17 is a working surface, and the right-angled waist of the right-angled trapezoidal prism 17 emits a fingerprint image; the optical fingerprint image is arranged below the right-angled trapezoidal prism 17 The motherboard of the acquisition unit.
- the plano-convex lens 18 is placed in front along the optical path.
- the two plane mirror surfaces 15, 16 are arranged along the optical path, respectively at an angle of 45° and 135° to the right angle of the right-angled trapezoidal prism 17, and are at an angle of 45° with the horizontal plane to accurately reflect the light to the setting.
- a CMOS photoelectric converter 8 that captures an image on the phase plane of the imaging objective of the lens system, the two planar mirror surfaces 15, 16 are used to extend the optical path, making the device more compact.
- the lens system includes an imaging objective lens and an eyepiece, which are sequentially disposed along the optical path direction, and include a lenticular lens 19, a first meniscus lens 20, and a second meniscus lens 21.
- the total length of the optical path is adjusted from 240mm to 280mm.
- the total length of the optical path in the rectangular trapezoidal prism 17 is 110mm ⁇ 130mm.
- the total length of the optical path in the plano-convex lens 18 is 7mm ⁇ 9mm.
- the total length of the optical path in the lenticular lens 19 is 0.8mm ⁇ 1.5mm.
- the total length of the optical path in the first meniscus lens 20 is adjusted to be 0.5 mm to 1.0 mm, and the total length of the optical path in the second meniscus lens 21 is 6.5 mm to 7.5 mm.
- the specific value is determined according to the object distance and the image distance of the lens material.
- the pitch of the right-angled trapezoidal prism 17, the plano-convex lens 18, the lenticular lens 19, the first meniscus lens 20, and the second meniscus lens 21 are adjusted in accordance with the image quality.
- the image side numerical aperture of this embodiment is 6.916.
- the image field radius is 4.3mm.
- Magnification is - 0.1.
- the object image is conjugated, that is, the total length of the light path is 260mm.
- the back intercept is 2.8mm.
- the right-angled trapezoidal prism 17 has a thickness of 34.657mm, a total length of 120mm, a half-hole of 37.709589, a beveled waist of 67°, an upper surface of 78mm ⁇ 50mm, and an optical material of K9.
- the optical path between the right-angled trapezoidal prism 17 and the plano-convex lens 18 has a total length of 5 mm and a half aperture of 31.832918 mm.
- the plano-convex lens 18 has a center thickness of 8 mm, a half aperture of 30.993274 mm, and an optical material of H-K9Lo.
- the total length of the optical path between the plano-convex lens 18 and the lenticular lens 19 after passing through the pupil is 100 mm, and the half aperture is 30.660635 mm.
- the pupil diameter is 6.257746 mm and the half aperture is 1.051812 mm.
- the lenticular lens 19 has a center thickness of 1.341117 mm, a half hole diameter of 3.025609 mm, and an optical material of H-ZLAF50B.
- the total length of the optical path between the lenticular lens 19 and the first meniscus lens 20 is 0.096224 mm, and the half hole diameter is 3.083121 mm.
- the first meniscus lens 20 has a center thickness of 0.797901 mm, a half aperture of 3.076572 mm, and an optical material of H-ZF52.
- the total length of the optical path between the first meniscus lens 20 and the second meniscus lens 21 is 8.832268 mm, and the half aperture is 2.946591 mm.
- the second meniscus lens 21 has a center thickness of 7.001482 mm and a half aperture of 4.903812 mm.
- the optical material is H-LAF54.
- the total length of the optical path between the second meniscus lens 21 and the image plane is 2.796325 mm, and the half aperture is 3.714652 mm.
- the half aperture of the image plane is 4.010869 mm.
- the indicating unit 12 includes an indicator light and a buzzer that are directly connected to the main control chip 7, respectively.
- the indicator light 1 is an LED indicator, which is controlled by the main control chip 7 of the circuit control module.
- the LED indicator light is combined by a red light diode and a green light diode, and a light guide column with uniform brightness is arranged on the upper surface of the outer casing, according to the illumination.
- the value of the intensity and the illumination mode are set, and the power source and the ground are respectively supplied and grounded from the main board of the optical fingerprint image acquisition unit through wires.
- the buzzer is arranged on one side of the casing, and is controlled by the main control chip of the circuit control module to make various responses in time, so that the human-computer interaction is simpler.
- the outer shape of the outer casing is substantially a rectangular parallelepiped, and the upper surface of the front surface of the outer casing is provided with a rectangular opening for use as a fingerprint collecting window 6, and has a concave curved surface 2,
- the base of the outer casing is a thickened and elongated rubber base, and the radius of the base is set to be 9mm, high-quality rubber feet with a thickness of 3mm, increase the anti-slip area.
- the length, width and height of the outer casing are adjusted according to the volume of the optical system.
- the fingerprint acquisition window 6 size is 45 X43mm, that is, the acquisition area of the CMOS sensor 8 is larger than 1.6 X 1.5 inches, which is in line with the requirements of the Chinese Public Security Department and the US FBI.
- the rear side of the outer casing is provided with a locking hole 5 reinforced with steel structure, the size is 7X 3mm, the shape is rectangular rounded corner, and the T-lock of the anti-theft lock with the long lm wire lock cable is engaged with each other to lock the device A movable space that is fixed at a fixed position or centered on the locked position and has a radius of the wire lock cable to prevent theft.
- the two sides of the outer casing are provided with a plurality of parallel anti-slip strips 3 for anti-slip and anti-slip.
- the anti-slip strip has a width of lmm, a depth of 0.8 mm and a length of 3 to 110 mm.
- the backlight unit 22 includes an LED backlight panel that uniformly distributes an infrared diode having a wavelength of 850 nm or 940 nm, and an external potentiometer for adjusting the brightness of the LED backlight panel.
- the backlight unit 22 is mounted directly under the right angle trapezoidal prism 17, and the fingerprint is collected. The light of the image information is presented to the image acquisition unit and is converted into an electrical signal.
- the process of collecting, registering and identifying the two-finger, single-finger and rolling fingerprint of this embodiment is as follows: 1) Connect the device to the computer with a USB cable, and the red LED of the LED indicator lights up after power-on;
- the software prompts the registration fingerprint to be fingerprinted, and the red LED in the LED indicator is off, the green LED flashes, the frequency is once every second, and the user presses one finger to the fingerprint collection.
- the fingerprint is registered on the surface, and the software determines whether the collection device has a fingerprint or not. If there is a fingerprint press, the fingerprint is registered. If the registration is successful, the next operation is performed. If the registration is unsuccessful, the finger is displayed repeatedly, according to the steps. 4) Continue to execute, if there is no fingerprint press, continue to follow step 4);
- the software After the fingerprint registration of the single finger is successful, the software prompts the registration finger to scroll the fingerprint, and the red LED in the LED indicator is off, the green LED is always on, and the user scrolls a finger on the fingerprint collection surface to register. Fingerprint, the software determines whether the collection device has fingerprint scrolling. If there is fingerprint scrolling, fingerprint registration is performed. If the registration is successful, the next operation is performed. If the registration is unsuccessful, the finger is displayed repeatedly, and the process is continued according to step 5). Without fingerprint scrolling, continue to follow step 5);
- the software prompts to register the fingerprint of the two fingers, and the red LED in the LED indicator is off, the green LED flashes, the frequency is twice a second, the user will have two fingers, generally For the index finger and the middle finger simultaneously on the fingerprint collection surface, the fingerprint is registered, and the software determines whether the collection device has a fingerprint or not. If there is a fingerprint press, the fingerprint is registered. If the registration is successful, the next operation is performed, if the registration is not If it is successful, press the finger again, follow step 6) to continue. If there is no fingerprint, press and continue to follow step 6);
- the red LED flashes at a frequency of twice a second.
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Abstract
本发明公开了一种双指、单指和滚动指纹的采集、登记与识别装置,包括指纹采集器、背光单元、指示单元和外壳,其特征在于:指紋采集器是包括光指纹图像采集单元的光学双指指纹采集器,光指纹图像采集单元包括带存储单元芯片的电路控制模块和光学系统,存储单元芯片用于存储功能文件,以便完成采集后的登记与识别。本发明采用模块化设计,以辅助提高管理力度及可靠性,其光学系统、电路控制模块及外壳具备小型化的特点,克服了现有同类型的双指指纹采集装置体积大的缺陷,从而进一步节约了成本,便于携带。本发明可以与计算机联合使用完成用户双指指纹采集、双指指纹比对、异常报警、控制信号输出等功能,有效提高了指纹采集速率和识别精度。
Description
说 书 一种双指、 单指和滚动指纹的采集、 登记与识别装置
技术领域
本发明涉及应用电子电路进行指纹识别的方法或装置, 特别是涉及一 种双指、 单指和滚动指紋的采集、 登记与识别装置。
背景技术
指纹识别技术具有方便、 可靠、 非侵害和成本比较低的特点, 将用户 指纹数据分配到相应的指紋验证装置, 可实时上传指纹按压记录, 生成指 纹按压报表, 为追査事故提供依据。 但是, 现有光学式指紋采集装置的采 集窗口尺寸尚未见有符合中国公安部门和美国联邦调查局(Federal Bureau oflnvestigation, 缩略词为 FBI)有关活体滚动或双指指纹采集窗口尺寸必 须大于 1.6 X 1.5英寸, 图像分辨率为 500dpi± l%, 灰度级为 256gray〜level 的要求, 而且指紋图像采集速度、 所用芯片均采用小封装、 缩减光学系统 的长度、 实现模块化以便携带等方面也有待进一步改进。
发明内容
本发明所要解决的技术问题是弥补上述现有技术的缺陷, 提供一种双 指、 单指和滚动指紋的采集、 登记与识别装置。
本发明的技术问题通过以下技术方案予以解决。
这种双指、 单指和滚动指紋的采集、 登记与识别装置, 包括指紋采集 器、 背光单元、 指示单元和保护面板即外壳。
这种双指、 单指和滚动指紋的采集、 登记与识别装置的特点是: 所述指紋采集器是包括光指纹图像采集单元的光学双指指纹采集器, 所述光指纹图像采集单元包括带存储单元芯片的电路控制模块和光学系 统, 所述电路控制模块和光学系统用于一般为食指和中指的双指、 单指和 滚动指纹的实时采集与比对, 所述存储单元芯片用于存储功能文件, 以便 完成采集后的登记与识别。
本发明的技术问题通过以下进一步的技术方案予以解决。
所述电路控制模块还包括用于采集图像的至少 85 万像素的互补金属 氧化物半导体 ( Complementary Metal-Oxide-Semiconductor , 縮略词为
CMOS)传感器、 控制 CMOS传感器完成采集图像数据的主控芯片、 提供 时钟信号给主控芯片的晶体振荡电路、 加密芯片、 降压集成电路、 以及与 计算机通讯进行数据传输的数据通讯单元, 所述数据通讯单元用于与计算 机联合使用, 以完成用户指纹采集与比对。
优选的是, 所述主控芯片是美国 Cypress 半导体公司出品的型号为 CY7C68013A的主控芯片, 设有双指指纹采集单元、 数据通讯单元、 数据 存储单元以及输出控制单元, 主控芯片分别与 CMOS传感器、 加密芯片、 存储单元芯片、 降压集成电路、 指示单元、 晶体振荡电路、 数据通讯单元 连接,用于实现双指指紋采集、双指指紋图像校正、数据通讯和输出控制。
优选的是, 所述 CMOS 传感器是美国 Aptina 公司出品的型号为 MT9M001C12STM的 130万像素黑白 CMOS传感器, 由主控芯片提供时 钟信号、 复位信号、 同步信号和 I2C信号进行控制, 采集到的数据直接传 送至所述主控芯片。
所述加密芯片是深圳市华曦达科技股份有限公司出品的型号为
DM2016N 的加密芯片, 用于下载自有软件算法和代码, 对用户重要数据 提供全方位、 高安全度的保护, 维护自身权益, 避免软件盗版。
所述存储单元芯片采用型号为 AT24C64CN-SH-B(64K)的存储芯片。 所述数据通讯单元包括带静电保护的通用串行总线 (Universal Serial Bus, 縮略词为 USB)连接座, 设置在外壳后侧, 且设有防水防尘橡胶盖。
所述 USB连接座是 12引脚双排 USB母座,与两端为 12引脚双排 USB 公座连接器的连接线配用。
所述光学系统包括直角梯形棱镜、 平凸透镜、 两个平面反光镜面和透 镜系统;
所述直角梯形棱镜沿着光路方向位于光源上方倒置在采集窗口处, 所 述直角梯形棱镜的下底面为工作面, 所述直角梯形棱镜的直角腰射出指纹 图像, 所述直角梯形棱镜的下方设有所述光指纹图像采集单元的主板。
所述平凸透镜沿着光路方向摆放在前面。
所述两个平面反光镜面沿着光路方向摆放, 分别与所述直角梯形棱镜 的直角边成 45° 和 135° 的夹角, 与水平面均成 45° 的夹角, 将光线准确 反射至设置在透镜系统的成像物镜的相面上采集图像的 CMOS 光电转换
器, 所述两个平面反光镜面用于延长光路, 使装置体积更加小型化。
所述透镜系统包括成像物镜和目镜, 沿着光路方向依次摆放, 包括双 凸透镜、 第一凹凸透镜、 第二凹凸透镜。
所述光路总长调整范围为 240mm~280mm, 直角梯形棱镜中光路总长 调整范围为 110mm~130mm,平凸透镜中光路总长调整范围为 7mm~9mm, 双凸透镜中光路总长调整范围为 0.8mm~1.5mm,第一凹凸透镜中光路总长 调整范围为 0.5mm~1.0mm, 第二凹凸透镜中光路总长调整范围为 6.5mm〜7.5mm, 具体数值根据镜片材料物距和像距决定, 所述直角梯形棱 镜、 平凸透镜、 双凸透镜、 第一凹凸透镜和第二凹凸透镜的间距根据图像 质量调整。
所述指示单元包括分别直接与主控芯片连接的指示灯和蜂鸣器。
所述指示灯是发光二极管 (Light Emitting Diode, 缩略词为 LED) 指 示灯,受电路控制模块主控芯片的控制,所述 LED指示灯光源为不同色可 见光的发光二极管, 且在外壳的上表面上设有使亮度均匀的导光柱, 根据 照明强度的取值和照明方式设置, 其电源和地分别通过导线从所述光指紋 图像采集单元的主板供电和共地。 所述蜂鸣器设置在外壳的一侧面, 受电路控制模块主控芯片的控制及 时做出各种响应, 使人机交互更简单。
所述外壳的形状大体为长方体, 外壳前面的上表面设有用做指纹采集 窗口的长方形开口, 且设有内凹的弧面, 所述外壳的底座是加厚加长的橡 胶底座, 所述外壳的底座还设有橡胶脚垫, 加大防滑面积, 以防止按压指 纹时发生指紋变形以及装置滑动甚至倾倒, 所述外壳的长宽高尺寸根据所 述光学系统的体积调整。
所述指纹采集窗口尺寸大于 1.6X 1.5英寸,即 CMOS传感器的采集区 域面积大于 1.6 X 1.5英寸, 符合中国公安部门和美国 FBI有关要求。
所述内凹的弧面,弧度从一 0.4rad变化至 +0.4rad,以便用户按压手指。 所述外壳的后侧设有内有钢结构加固的锁孔,与采用钢丝锁缆的防盗 锁具的 T型锁扣相互卡合, 将装置锁牢在固定位置或以被锁位置为圆心、 以钢丝锁缆长为半径的可挪动空间, 以防止被盗。
所述外壳的两侧面设有多条平行的防滑条, 用于防滑与装饰的防滑,
所述防滑条宽度为 lmm, 深度为 0.8mm, 长度为 3~110mm。
所述背光单元包括均布波长为 850nm或 940nm的红外二极管的 LED 背光灯板和用于调节所述 LED背光板亮度的外接电位器,所述背光单元安 装在所述直角梯形棱镜的正下方, 将采集指紋图像信息的光线呈现在图像 采集单元感光阵列并转换成电信号。
本发明与现有技术对比的有益效果是:
本发明采用模块化设计, 以辅助提高管理力度及可靠性,其光学系统、 电路控制模块及外壳具备小型化的特点, 克服了现有同类型的双指指紋采 集装置体积大的缺陷, 从而进一步节约了成本, 便于携带。 本发明可以与 计算机联合使用完成用户双指指紋采集、 双指指紋比对、 异常报警、 控制 信号输出等功能, 有效提高了指紋采集速率和识别精度。
附图说明
图 1是本发明具体实施方式的外壳的主视图;
图 2是本发明具体实施方式的外壳的侧视图;
图 3是本发明具体实施方式的外壳的俯视图;
图 4是本发明具体实施方式的光指纹图像采集单元的组成方框图; 图 5是本发明具体实施方式的光学系统的光路二维图;
图 6是本发明具体实施方式的操作流程图。
具体实施方式
下面结合具体实施方式并对照附图对本发明的方法进行说明。
一种如图 1〜6所示的双指、单指和滚动指紋的采集、登记与识别装置, 包括指纹采集器、 背光单元 22、 指示单元 12和保护面板即外壳。
指纹采集器是包括光指纹图像采集单元的光学双指指紋采集器, 光指 纹图像采集单元包括带存储单元芯片 10的电路控制模块和光学系统,电路 控制模块和光学系统用于一般为食指和中指的双指、 单指和滚动指紋的实 时采集与比对,存储单元芯片 10用于存储功能文件, 以便完成采集后的登 记与识别。
电路控制模块还包括用于采集图像的 CMOS传感器 8、 控制 CMOS 传感器 8完成采集图像数据的主控芯片 7、 提供时钟信号给主控芯片 7的 晶体振荡电路 13、 加密芯片 9、 降压集成电路 11、 以及与计算机通讯进行
数据传输的数据通讯单元 14, 数据通讯单元 14用于与计算机联合使用, 以完成用户指纹采集与比对。
主控芯片 7是美国 Cypress半导体公司出品的型号为 CY7C68013A的 主控芯片, 设有双指指纹采集单元、 数据通讯单元、 数据存储单元以及输 出控制单元, 主控芯片 7分别与 CMOS传感器 8、 加密芯片 9、 存储单元 芯片 10、 降压集成电路 11、 指示单元 12、 晶体振荡电路 13、 数据通讯单 元 14连接, 用于实现双指指紋采集、双指指纹图像校正、数据通讯和输出 控制。
加密芯片 9 是深圳市华曦达科技股份有限公司出品的型号为 DM2016N 的加密芯片, 用于下载自有软件算法和代码, 对用户重要数据 提供全方位、 高安全度的保护, 维护自身权益, 避免软件盗版。
存储单元芯片 10采用型号为 AT24C64CN-SH-B(64K)的存储芯片, 由 主控芯片 7进行控制。
CMOS传感器 8是美国 Aptina公司出品的型号为 MT9M001C12STM 的 130万像素黑白 CMOS传感器,由主控芯片 7提供时钟信号、复位信号、 同步信号和 I2C信号进行控制, 采集到的数据直接传送至主控芯片 7。
数据通讯单元 14包括带静电保护的 USB连接座 4, 设置在外壳后侧, 且设有防水防尘橡胶盖。
USB连接座是 12引脚双排 USB母座, 与两端为 12引脚双排 USB公 座连接器的连接线配用。
光学系统包括直角梯形棱镜 17、平凸透镜 18、两个平面反光镜面 15、 16和透镜系统;
直角梯形棱镜 17沿着光路方向位于光源上方倒置在采集窗口处,直角 梯形棱镜 17的下底面为工作面,直角梯形棱镜 17的直角腰射出指纹图像; 直角梯形棱镜 17的下方设有光指纹图像采集单元的主板。
平凸透镜 18沿着光路方向摆放在前面。
两个平面反光镜面 15、 16 沿着光路方向摆放, 分别与直角梯形棱镜 17的直角边成 45° 和 135° 的夹角,与水平面均成 45° 的夹角,将光线准 确反射至设置在透镜系统的成像物镜的相面上采集图像的 CMOS 光电转 换器 8,两个平面反光镜面 15、 16用于延长光路,使装置体积更加小型化。
透镜系统包括成像物镜和目镜, 沿着光路方向依次摆放, 包括双凸透 镜 19、 第一凹凸透镜 20、 第二凹凸透镜 21。
光路总长调整范围为 240mm~280mm,直角梯形棱镜 17中光路总长调 整范围为 110mm~130mm,平凸透镜 18中光路总长调整范围为 7mm〜9mm, 双凸透镜 19中光路总长调整范围为 0.8mm~1.5mm,第一凹凸透镜 20中光 路总长调整范围为 0.5mm~1.0mm, 第二凹凸透镜 21中光路总长调整范围 为 6.5mm〜7.5mm, 具体数值根据镜片材料物距和像距决定。直角梯形棱镜 17、平凸透镜 18、双凸透镜 19、第一凹凸透镜 20和第二凹凸透镜 21的间 距根据图像质量调整。
本具体实施方式的像方数值孔径为 6.916。 像方视场半径为 4.3mm。 放大倍率为— 0.1。 物像共轭距, 即光路总长为 260mm。 后截距为 2.8mm。
直角梯形棱镜 17 厚为 34.657mm, 光路总长为 120mm, 半孔径为 37.709589, 斜边腰的角度为 67° , 上表面即采集面为 78mmX 50mm, 光 学材料为 K9。
直角梯形棱镜 17 与平凸透镜 18 间的光路总长为 5mm, 半孔径为 31.832918mm。
平凸透镜 18的中心厚度为 8mm, 半孔径为 30.993274 mm, 光学材料 为 H-K9Lo
平凸透镜 18经过光阑孔后与双凸透镜 19间的光路总长为 100mm,半 孔径为 30.660635 mm。 光阑孔的厚度为 6.257746 mm, 半孔径为 1.051812 mm。
双凸透镜 19的中心厚度为 1.341117mm, 半孔径为 3.025609 mm, 光 学材料为 H-ZLAF50B。
双凸透镜 19与第一凹凸透镜 20间的光路总长为 0.096224mm, 半孔 径为 3.083121 mm。
第一凹凸透镜 20的中心厚度为 0.797901mm,半孔径为 3.076572 mm, 光学材料为 H-ZF52。
第一凹凸透镜 20与第二凹凸透镜 21间的光路总长为 8.832268mm, 半孔径为 2.946591 mm。
第二凹凸透镜 21的中心厚度为 7.001482mm,半孔径为 4.903812 mm,
光学材料为 H-LAF54。
第二凹凸透镜 21 与像面间的光路总长为 2.796325mm, 半孔径为 3.714652 mm。 像面的半孔径为 4.010869 mm。
指示单元 12包括分别直接与主控芯片 7连接的指示灯和蜂鸣器。 指示灯 1是 LED指示灯, 受电路控制模块主控芯片 7的控制, LED 指示灯由红光二极管和绿光二极管组合, 且在外壳的上表面上设有使亮度 均匀的导光柱, 根据照明强度的取值和照明方式设置, 其电源和地分别通 过导线从光指纹图像采集单元的主板供电和共地。
蜂鸣器设置在外壳的一侧面, 受电路控制模块主控芯片的控制及时做 出各种响应, 使人机交互更简单。
外壳的形状大体为长方体, 外壳前面的上表面设有用做指纹采集窗口 6的长方形开口,且设有内凹的弧面 2,外壳的底座是加厚加长的橡胶底座, 底座下设有半径为 9mm, 厚度为 3mm的高质量橡胶脚垫, 加大防滑面积。 以防止按压指纹时发生指纹变形以及装置滑动甚至倾倒, 外壳的长宽高尺 寸根据所述光学系统的体积调整。
指纹采集窗口 6尺寸为 45 X43mm, 即 CMOS传感器 8的采集区域面 积大于 1.6 X 1.5英寸, 符合中国公安部门和美国 FBI有关要求。
内凹的弧面 2, 弧度从一 0.4rad变化至 +0.4rad, 以便用户按压手指。 外壳的后侧设有内有钢结构加固的锁孔 5, 尺寸为 7X 3mm, 形状为 矩形圆角, 与采用长 lm的钢丝锁缆的防盗锁具的 T型锁扣相互卡合, 将 装置锁牢在固定位置或以被锁位置为圆心、以钢丝锁缆长为半径的可挪动 空间, 以防止被盗。
外壳的两侧面设有多条平行的防滑条 3, 用于防滑与装饰的防滑, 所 述防滑条宽度为 lmm, 深度为 0.8mm, 长度为 3~110mm。
背光单元 22包括均布波长为 850nm或 940nm的红外二极管的 LED 背光灯板和用于调节所述 LED背光板亮度的外接电位器, 背光单元 22安 装在直角梯形棱镜 17的正下方,将采集指纹图像信息的光线呈现在图像采 集单元感光阵列并转换成电信号。
本具体实施方式的双指、 单指和滚动指纹的采集、 登记与识别过程如 下:
1 )用 USB连接线将本装置与计算机连接,通电后 LED指示灯的红光 二极管亮;
2) 在计算机上打开对应的程序准备指纹登记;
3 )显示程序主界面, 依据用户输入的信息执行相应程序, 例如输入用 户相关信息等操作, 同时点扫描按钮;
4)按照软件提示进行指纹的登记工作, 软件提示登记单指指纹, 且此 时 LED指示灯中的红光二极管灭, 绿光二极管闪烁, 频率为一秒一次, 用 户将一个手指按到指纹采集面上进行登记指纹, 软件判断采集装置是否有 指紋捺按, 如果有指紋捺按, 则进行指纹登记, 如果登记成功, 则进行下 一步操作, 如果登记不成功, 则显示重按手指, 按照步骤 4) 继续执行, 如果无指纹捺按, 则继续按照步骤 4) 执行;
5 ) 单指指纹登记成功后, 软件自行提示登记单指滚动指纹, 且此时 LED指示灯中的红光二极管灭, 绿光二极管常亮, 用户将一个手指在指紋 采集面上滚动, 进行登记指紋, 软件判断采集装置是否有指纹滚动, 如果 有指纹滚动, 则进行指纹登记, 如果登记成功, 则进行下一步操作, 如果 登记不成功, 则显示重按手指, 按照步骤 5)继续执行, 如果无指紋滚动, 则继续按照步骤 5 ) 执行;
6) 单指滚动指纹登记成功后, 软件自行提示登记双指指纹, 且此时 LED指示灯中的红光二极管灭, 绿光二极管闪烁, 频率为一秒两次, 用户 将两个手指, 一般为食指和中指同时按在指纹采集面上, 进行登记指纹, 软件判断采集装置是否有指紋捺按, 如果有指纹捺按, 则进行指紋登记, 如果登记成功, 则进行下一步操作, 如果登记不成功, 则显示重按手指, 按照步骤 6) 继续执行, 如果无指纹捺按, 则继续按照步骤 6) 执行;
7) 指纹采集装置异常时, 红光二极管闪烁, 频率为一秒两次。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说 明, 不能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术 领域的普通技术人员来说, 在不脱离本发明构思的前提下做出若干等同替 代或明显变型, 而且性能或用途相同, 都应当视为属于本发明由所提交的 权利要求书确定的专利保护范围。
Claims
1. 一种双指、 单指和滚动指纹的采集、 登记与识别装置, 包括指纹采 集器、 背光单元、 指示单元和保护面板即外壳, 其特征在于:
所述指紋采集器是包括光指紋图像采集单元的光学双指指紋采集器, 所述光指紋图像采集单元包括带存储单元芯片的电路控制模块和光学系 统, 所述电路控制模块和光学系统用于一般为食指和中指的双指、 单指和 滚动指纹的实时采集与比对, 所述存储单元芯片用于存储功能文件, 以便 完成采集后的登记与识别。
2.如权利要求 1所述的双指、 单指和滚动指纹的采集、 登记与识别装 置, 其特征在于:
所述电路控制模块还包括用于采集图像的至少 85 万像素的互补金属 氧化物半导体 CMOS传感器、 控制 CMOS传感器完成采集图像数据的主 控芯片、 提供时钟信号给主控芯片的晶体振荡电路、 加密芯片、 降压集成 电路、 以及与计算机通讯进行数据传输的数据通讯单元, 所述数据通讯单 元用于与计算机联合使用, 以完成用户指紋采集与比对。
3.如权利要求 1或 2所述的双指、 单指和滚动指纹的采集、 登记与识 别装置, 其特征在于- 所述数据通讯单元包括带静电保护的 USB连接座, 设置在外壳后侧, 且设有防水防尘橡胶盖。
4.如权利要求 3所述的双指、 单指和滚动指纹的采集、 登记与识别装 置, 其特征在于:
所述光学系统包括直角梯形棱镜、 平凸透镜、 两个平面反光镜面和透 镜系统;
所述直角梯形棱镜沿着光路方向位于光源上方倒置在采集窗口处, 所 述直角梯形棱镜的下底面为工作面, 所述直角梯形棱镜的直角腰射出指紋 图像, 所述直角梯形棱镜的下方设有所述光指纹图像采集单元的主板; 所述平凸透镜沿着光路方向摆放在前面;
所述两个平面反光镜面沿着光路方向摆放, 分别与所述直角梯形棱镜 的直角边成 45° 和 135° 的夹角, 与水平面均成 45° 的夹角, 将光线准确 反射至设置在透镜系统的成像物镜的相面上采集图像的 CMOS 光电转换 器, 所述两个平面反光镜面用于延长光路, 使装置的体积更加小型化; 所述透镜系统包括成像物镜和目镜, 沿着光路方向依次摆放, 包括双 凸透镜、 第一凹凸透镜、 第二凹凸透镜;
所述光路总长调整范围为 240mm~280mm, 直角梯形棱镜中光路总长 调整范围为 110mm~130mm,平凸透镜中光路总长调整范围为 7mm~9mm, 双凸透镜中光路总长调整范围为 0.8mm~1.5mm,第一凹凸透镜中光路总长 调整范围为 0.5mm~1.0mm, 第二凹凸透镜中光路总长调整范围为 6.5mm~7.5mm, 具体数值根据镜片材料物距和像距决定, 所述直角梯形棱 镜、 平凸透镜、 双凸透镜、 第一凹凸透镜和第二凹凸透镜的间距根据图像 质量调整。
5.如权利要求 4所述的双指、 单指和滚动指纹的采集、 登记与识别装 置, 其特征在于:
所述指示单元包括分别直接与主控芯片连接的指示灯和蜂鸣器; 所述指示灯是发光二极管 LED指示灯,受电路控制模块中主控芯片的 控制,所述 LED指示灯光源为不同色可见光的发光二极管,且在外壳的上 表面上设有使亮度均匀的导光柱, 根据照明强度的取值和照明方式设置, 其电源和地分别通过导线从所述光指纹图像采集单元的主板供电和共地; 所述蜂鸣器设置在外壳的一侧面, 受电路控制模块主控芯片的控制及 时做出各种响应, 使人机交互更简单。
6.如权利要求 5所述的双指、 单指和滚动指紋的采集、 登记与识别装 置, 其特征在于- 所述外壳的形状大体为长方体, 外壳前面的上表面设有用做指紋采集 窗口的长方形开口, 且设有内凹的弧面, 所述外壳的底座是加厚加长的橡 胶底座, 所述外壳的底座还设有橡胶脚垫, 加大防滑面积, 以防止按压指 紋时发生指紋变形以及装置滑动甚至倾倒, 所述外壳的长宽高尺寸根据所 述光学系统的体积调整。
7.如权利要求 6所述的双指、 单指和滚动指纹的采集、 登记与识别装 置, 其特征在于:
所述指纹采集窗口尺寸大于 1.6X 1.5英寸,即 CMOS传感器的采集区 域面积大于 1.6 X 1.5英寸,符合中国公安部门和美国联邦调查局相关要求; 所述内凹的弧面,弧度从一 0.4rad变化至 +0.4md,以便用户按压手指。
8.如权利要求 7所述的双指、 单指和滚动指纹的采集、 登记与识别装 置, 其特征在于- 所述外壳的后侧设有内有钢结构加固的锁孔,与采用钢丝锁缆的防盗 锁具的 T型锁扣相互卡合, 将装置锁牢在固定位置或以被锁位置为圆心、 以钢丝锁缆长为半径的可挪动空间, 以防止被盗。
9.如权利要求 8所述的双指、 单指和滚动指纹的采集、 登记与识别装 置, 其特征在于- 所述外壳的两侧面设有多条平行的防滑条, 用于防滑与装饰的防滑, 所述防滑条宽度为 lmm, 深度为 0.8mm, 长度为 3~110mm。
10.如权利要求 9所述的双指、 单指和滚动指纹的采集、 登记与识别装 置, 其特征在于:
所述背光单元包括均布波长为 850nm或 940nm的红外二极管的 LED 背光灯板和用于调节所述 LED背光板亮度的外接电位器,所述背光单元安 装在所述直角梯形棱镜的正下方, 将采集指紋图像信息的光线呈现在图像 采集单元感光阵列并转换成电信号。
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