WO2021258741A1 - 红外激发成像装置 - Google Patents

红外激发成像装置 Download PDF

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Publication number
WO2021258741A1
WO2021258741A1 PCT/CN2021/075348 CN2021075348W WO2021258741A1 WO 2021258741 A1 WO2021258741 A1 WO 2021258741A1 CN 2021075348 W CN2021075348 W CN 2021075348W WO 2021258741 A1 WO2021258741 A1 WO 2021258741A1
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Prior art keywords
infrared excitation
infrared
imaging device
motor
excitation imaging
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PCT/CN2021/075348
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English (en)
French (fr)
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罗北
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深圳市中钞科信金融科技有限公司
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Publication of WO2021258741A1 publication Critical patent/WO2021258741A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/30—Transforming light or analogous information into electric information
    • H04N5/33—Transforming infrared radiation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means

Definitions

  • the invention relates to the field of imaging technology, in particular to an infrared excitation imaging device.
  • infrared inks in the current printing industry are mainly divided into two categories, one is infrared absorption and the other is infrared excitation.
  • Infrared absorption machine vision solutions are relatively mature.
  • machine vision has not been directly applied to infrared excitation imaging detection.
  • the mainstream approach is to manually use infrared light sources to detect with naked eyes in a dark room, so improvement is needed.
  • the technical problem to be solved by the present invention is to provide an infrared excitation imaging device, which realizes rapid and accurate detection of the machine instead of human eyes, effectively improves the imaging brightness, and realizes imaging with a camera.
  • an infrared excitation imaging device including:
  • a subject the subject is provided with infrared excitation ink
  • An infrared excitation light source the light emitted by the infrared excitation light source irradiates the infrared excitation ink
  • An industrial camera the industrial camera is provided with an infrared excitation imaging lens, the infrared excitation imaging lens faces the infrared excitation ink, and an infrared cut filter is arranged in the optical path between the infrared excitation imaging lens and the object.
  • the infrared excitation light source includes a housing provided with a spherical groove, at least two infrared LED lamp beads are arranged in the spherical groove, and a condenser is provided on the infrared LED lamp beads, and the infrared LED The light emitted by the lamp beads is focused on the infrared excitation ink;
  • the number of the infrared LED lamp beads is 8, and the infrared LED lamp beads are arranged on concentric circles.
  • the infrared cut filter is arranged at the front end and/or the back end of the infrared excitation imaging lens.
  • the industrial camera is installed on a top plate through a second translation mechanism, the top plate is connected to a base through a supporting plate, and the base is connected to an infrared excitation light source through a first translation mechanism, a lifting mechanism, and a steering mechanism.
  • the second translation mechanism includes an electric push rod, the push rod of the electric push rod is fixed with a second sliding block, the second sliding block is slidably mounted on the top plate, and the side of the second sliding block A second mounting board is fixed, and the industrial camera is mounted on the second mounting board;
  • the first translation mechanism includes a first motor, the output shaft of the first motor is connected with a first screw, and a first sliding block is sleeved on the first screw through a thread, and the first The sliding block is slidably mounted on the base, and a movable seat is fixed on the side of the first sliding block.
  • the lifting mechanism includes a second motor and a guide post, the second motor and the guide post are mounted on the moving seat, and the output shaft of the second motor is connected with a second screw rod, the second screw rod A lifting seat is sleeved on the upper part through a thread, and the guide post slides through the lifting seat.
  • the steering mechanism includes a rotating seat and a first mounting plate, the movable seat and the first mounting plate are both hinged on the lifting seat, and a third motor is installed on the side of the movable seat.
  • a sleeve is connected to the output shaft of the sleeve, a third screw rod is sleeved in the sleeve through a thread, and the third screw rod is hinged on the first mounting plate.
  • the LED lamp bead combination is embedded in a dome, and the dome structure and condenser lens are used, so it overcomes the lack of direct application of machine vision.
  • the infrared excitation imaging detection the problem that the infrared light source can only be used to detect with the naked eye in the dark room can be used to achieve a better focus of all the light emitted by the LED lamp beads to the same position, so the position illuminated by the light source can be maximized.
  • the imaging brightness is effectively improved, and the imaging with the camera is realized.
  • the first motor drives the first screw to rotate
  • the first screw can drive the sliding block to translate through the threaded transmission between the first screw and the first sliding block
  • the second motor drives the second
  • the screw rod rotates
  • the second screw rod can drive the lifting base to move in the vertical direction through the threaded transmission between the second screw rod and the lifting base.
  • the third motor drives the sleeve to rotate.
  • the three-screw rod moves along the axis of the sleeve to drive the first mounting plate to rotate.
  • Fig. 1 is a schematic diagram of the structure of the infrared excitation imaging device of the present invention.
  • Fig. 2 is a schematic diagram of the structure of the infrared excitation imaging device of the present invention.
  • Fig. 3 is a schematic diagram of the structure of an infrared cut filter in the infrared excitation imaging device of the present invention.
  • Fig. 4 is a schematic diagram of the structure of the infrared excitation light source in the infrared excitation imaging device of the present invention.
  • Fig. 5 is a schematic diagram of the installation structure of the infrared excitation imaging device of the present invention.
  • Fig. 6 is a schematic structural diagram of a second translation mechanism in the infrared excitation imaging device of the present invention.
  • Fig. 7 is a schematic structural diagram of the first translation mechanism in the infrared excitation imaging device of the present invention.
  • Fig. 8 is a schematic structural diagram of the lifting mechanism in the infrared excitation imaging device of the present invention.
  • Fig. 9 is a schematic diagram of the structure of the steering mechanism in the infrared excitation imaging device of the present invention.
  • the infrared excitation imaging device of the present invention includes a subject 1, an infrared excitation light source 3, and an industrial camera 4.
  • the subject 1 is provided with an infrared excitation ink 2 and the light emitted by the infrared excitation light source 3 is illuminated
  • the industrial camera 4 is equipped with an infrared excitation imaging lens 5, the infrared excitation imaging lens 5 faces the subject 1, and the optical path between the industrial camera 4 and the subject 1 is provided with an infrared cut filter 6
  • the surface of the subject 1 is provided with infrared excitation ink 2, which will excite visible light of other wavelengths after receiving the light emitted by the infrared excitation light source 3, so that a specific pattern is visible to the naked eye.
  • the infrared cut filter 6 is arranged at the front and/or rear end of the infrared excitation imaging lens 5.
  • an infrared cut filter is added in front of and behind the infrared excitation imaging lens 5 in this embodiment.
  • Mirror 6, filtering effect is better.
  • the infrared excitation light source 3 is a combination of infrared LED lamp beads 32 embedded in a dome, and at the same time, a condenser 33 is used in front of the infrared LED lamp beads 32 to combine all the infrared LED lamp beads 32
  • the emitted light is focused to the same position, so the maximum light intensity can be obtained at the position illuminated by the light source; there is infrared excitation ink 2 on the surface of the subject 1, after receiving the light emitted by the infrared LED lamp bead 32, it will excite other Wavelength of visible light, so specific patterns can be seen by the naked eye; an infrared cut filter 6 is added in front of and behind the infrared excitation imaging lens 5.
  • the brightness level of the excited visible light is several orders of magnitude different from the light emitted by the infrared LED lamp beads 32.
  • the industrial camera 4 cannot obtain the excited pattern (the light emitted by the infrared LED will It is annihilated), so an improved lens is needed; the industrial camera 4 can replace manual labor with a machine, and the industrial camera 4 can be used to collect the excited images for subsequent software processing and analysis.
  • the infrared excitation light source 3 is designed to improve the imaging brightness level
  • the infrared excitation imaging lens 5 is improved in design
  • the interference light is filtered
  • the industrial camera 4 machine vision detection realizes fast and accurate detection.
  • the industrial camera 4 is installed on the top plate 13 through the second translation mechanism 11.
  • the top plate 13 is connected to the base 7 through the support plate 12, and the base 7 is passed through the first translation mechanism 8, the lifting mechanism 9, and the steering mechanism 10.
  • the second translation mechanism 11 includes an electric push rod 111, the push rod of the electric push rod 111 is fixed with a second slider 112, the second slider 112 is slidably mounted on the top plate 13, and the second slider 112
  • a second mounting plate 113 is fixed on the side of the industrial camera 4, and the industrial camera 4 is mounted on the second mounting plate 113;
  • the first translation mechanism 8 includes a first motor 81, and the output shaft of the first motor 81 is connected with a first screw 82, A threaded rod 82 is sleeved with a first slider 83, the first slider 83 is slidably mounted on the base 7, and the side of the first slider 83 is fixed with a movable seat 84; the lifting mechanism
  • the first motor 81 drives the first screw 82 to rotate.
  • the first screw 82 can drive the slider 83 to translate through the threaded transmission with the first slider 83, thereby driving the infrared excitation light source 3 to translate;
  • the second motor 91 drives The second screw rod 93 rotates, and the second screw rod 93 can drive the lifting base 92 to move in the vertical direction through the threaded transmission between the second screw rod 93 and the lifting base 92, and the infrared excitation light source 3 can be driven to move in the vertical direction from the heat;
  • the third motor 102 drives the sleeve 103 to rotate.
  • the horizontal position of the infrared excitation light source 3 can be adjusted by the first translation mechanism 8, the height position of the infrared excitation light source 3 can be adjusted by the lifting mechanism 9, and the angular position of the infrared excitation light source 3 can be adjusted by the steering mechanism 10.
  • the mechanism 8, the lifting mechanism 9, and the steering mechanism 10 are all driven by a screw rod, which can make full use of the accuracy and self-locking of the screw rod transmission to ensure the accuracy and stability of the adjustment; at the same time, the second translation mechanism 11 can adjust the industrial camera 4
  • the horizontal position improves the flexibility of the overall use and is easy to adjust.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Devices (AREA)
  • Blocking Light For Cameras (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

本发明公开了一种红外激发成像装置，包括：被拍摄物，被拍摄物上设有红外激发油墨；红外激发光源发出的光线照射在红外激发油墨上；工业相机上设有红外激发成像镜头，红外激发成像镜头朝向所述红外激发油墨，红外激发成像镜头与被拍摄物之间的光路中设有红外截止滤镜。本发明实现机器代替人眼的快速、准确地检测，成像亮度得到有效提升，实现用相机成像。

Description

红外激发成像装置 技术领域
本发明涉及成像技术领域，特别是涉及一种红外激发成像装置。
 背景技术
现有技术中，在机器视觉领域，目前印刷行业红外油墨主要是两大类，一个是红外吸收，一个是红外激发。红外吸收机器视觉方案已经比较成熟。目前尚未有机器视觉直接应用在红外激发成像检测，主流的做法是人工在暗室内用红外光源肉眼检测，因此需要改进。
 技术问题
本发明所要解决的技术问题在于提供一种红外激发成像装置，实现机器代替人眼的快速、准确地检测，成像亮度得到有效提升，实现用相机成像。
 技术解决方案
为解决上述技术问题，本发明提供一种红外激发成像装置，包括：
被拍摄物，所述被拍摄物上设有红外激发油墨；
红外激发光源，所述红外激发光源发出的光线照射在红外激发油墨上；
工业相机，所述工业相机上设有红外激发成像镜头，所述红外激发成像镜头朝向所述红外激发油墨，所述红外激发成像镜头与被拍摄物之间的光路中设有红外截止滤镜。
进一步地，所述红外激发光源包括一设有球面凹槽的壳体，所述球面凹槽内设有至少两颗红外LED 灯珠，所述红外LED 灯珠上设有聚光镜，所述红外LED 灯珠发出的光线聚焦到红外激发油墨上；
进一步地，所述红外LED 灯珠的数量为8颗，所述红外LED 灯珠布设在同心圆上。
进一步地，所述红外截止滤镜设置在红外激发成像镜头的前端和/或后端。
进一步地，所述工业相机通过第二平移机构安装在顶板上，所述顶板通过支撑板连接有底座，所述底座上通过第一平移机构、升降机构、转向机构与红外激发光源连接。
进一步地，所述第二平移机构包括电动推杆，所述电动推杆的推杆固定有第二滑块，所述第二滑块滑动安装在顶板上，所述第二滑块的侧边固定有第二安装板，所述工业相机安装在第二安装板上；
进一步地，所述第一平移机构包括第一电机，所述第一电机的输出轴连接有第一丝杆，所述第一丝杆上通过螺纹套接有第一滑块，所述第一滑块滑动安装在底座上，所述第一滑块的侧边固定有移动座。
进一步地，所述升降机构包括第二电机和导柱，所述第二电机和导柱安装在移动座上，所述第二电机的输出轴连接有第二丝杆，所述第二丝杆上通过螺纹套接有升降座，所述导柱滑动贯穿升降座。
进一步地，所述转向机构包括转动座和第一安装板，所述移动座和第一安装板均铰接在升降座上，所述移动座的侧边安装有第三电机，所述第三电机的输出轴连接有套筒，所述套筒内通过螺纹套接有第三丝杆，所述第三丝杆铰接在第一安装板上。
 有益效果
本发明实施例中因为采用了将凹槽设置为类似于一个穹面结构， 将LED 灯珠组合镶嵌于一个穹面内，使用穹面结构和聚光镜部件，所以克服了目前尚未有机器视觉直接应用在红外激发成像检测，只能采用人工在暗室内用红外光源肉眼检测的问题，进而达到了更好的将所有LED 灯珠发出的光线聚焦到同一个位置，因此在光源照射的位置可以获得最大的光强，从而实现机器代替人眼的快速、准确地检测，成像亮度得到有效提升，实现用相机成像。
进一步的，因为采用了电动推杆推动工业相机，第一电机带动第一丝杆转动，第一丝杆通过与第一滑块之间的螺纹传动可带动滑块平移，第二电机带动第二丝杆转动，第二丝杆通过与升降座之间的螺纹传动可带动升降座在竖直方向移动第三电机带动套筒转动，套筒通过与第三丝杆之间的螺纹传动可推动第三丝杆沿套筒轴心线移动，从而可带动第一安装板转动，所以克服了传统红外激发光源不便于调整的技术问题，进而达到了方便调整红外激发光源的水平位置、竖直位置和角度位置以及工业相机的水平位置的技术效果。
 附图说明
图1是本发明红外激发成像装置的结构原理图。
图2是本发明红外激发成像装置的结构示意图。
图3是本发明红外激发成像装置中红外截止滤镜的结构示意图。
图4是本发明红外激发成像装置中红外激发光源的结构示意图。
图5是本发明红外激发成像装置的安装结构示意图。
图6是本发明红外激发成像装置中的第二平移机构的结构示意图。
图7是本发明红外激发成像装置中的第一平移机构的结构示意图。
图8是本发明红外激发成像装置中的升降机构的结构示意图。
图9是本发明红外激发成像装置中的转向机构的结构示意图。
 本发明的最佳实施方式
为了更充分理解本发明的技术内容，下面结合示意图对本发明的技术方案进一步介绍和说明，但不局限于此。
如图1、图2所示，本发明红外激发成像装置包括被拍摄物1、红外激发光源3以及工业相机4，被拍摄物1上设有红外激发油墨2，红外激发光源3发出的光线照射在红外激发油墨2上，工业相机4上设有红外激发成像镜头5，红外激发成像镜头5朝向被拍摄物1，工业相机4与被拍摄物1之间的光路中设有红外截止滤镜6，被拍摄物1的表面设有红外激发油墨2，在接受到红外激发光源3发射的光线后，会激发出其他波长的可见光，因此肉眼可见特定的图案。
可以理解的，如图4所示，红外激发光源3包括一设有球面凹槽34的壳体31，在球面凹槽34内设有至少两颗红外LED 灯珠32，在红外LED 灯珠32上设有聚光镜33，将红外LED 灯珠32发出的光线聚焦到红外激发油墨2上，凹槽34类似于一个穹面结构， 将LED 灯珠组合镶嵌于一个穹面内。使用穹面结构和聚光镜33部件，更好的将所有LED 灯珠发出的光线聚焦到同一个位置，因此在光源照射的位置可以获得最大的光强。具体地，红外LED 灯珠32的数量为8颗，将红外LED 灯珠32布设在同心圆上。
如图3所示，在红外截止滤镜6设置在红外激发成像镜头5的前端和/或后端，较佳地，本实施例中在红外激发成像镜头5前面和后面各增加一块红外截止滤镜6，过滤效果更好。
综上，如图1至图4所示，红外激发光源3是将红外LED 灯珠32组合镶嵌于一个穹面，同时在红外LED 灯珠32前方通过使用聚光镜33，将所有红外LED 灯珠32发出的光线聚焦到同一个位置，因此在光源照射的位置可以获得最大的光强；被拍摄物1表面有红外激发油墨2，在接受到红外LED 灯珠32发射的光线后，会激发出其他波长的可见光，因此肉眼可见特定的图案；在红外激发成像镜头5的前面跟后面各增加一块红外截止滤镜6，这是一款针对红外激发成像改进的工业相机4镜头，因为红外激发油墨2激发出来的可见光，亮度级别相较于红外LED 灯珠32发射的光线相差几个数量级，在不使用改进的镜头的情况下，工业相机4无法获取到激发出来的图案（红外LED发射的光线将其湮灭），所以需要改进后的镜头；工业相机4可以实现机器代替人工，用工业相机4对激发的图像进行采集，以便后续的软件处理、分析。
本发明通过对红外激发光源3进行设计，提高成像亮度级别，通过红外激发成像镜头5改进设计，过滤干扰光线，通过工业相机4机器视觉检测，实现快速准确的检测。
如图5至图9，工业相机4通过第二平移机构11安装在顶板13上，顶板13通过支撑板12连接有底座7，底座7上通过第一平移机构8、升降机构9、转向机构10与红外激发光源3连接；第二平移机构11包括电动推杆111，电动推杆111的推杆固定有第二滑块112，第二滑块112滑动安装在顶板13上，第二滑块112的侧边固定有第二安装板113，工业相机4安装在第二安装板113上；第一平移机构8包括第一电机81，第一电机81的输出轴连接有第一丝杆82，第一丝杆82上通过螺纹套接有第一滑块83，第一滑块83滑动安装在底座7上，第一滑块83的侧边固定有移动座84；升降机构9包括第二电机91和导柱94，第二电机91和导柱94安装在移动座84上，第二电机91的输出轴连接有第二丝杆93，第二丝杆93上通过螺纹套接有升降座92，导柱94滑动贯穿升降座92；转向机构10包括转动座101和第一安装板105，移动座101和第一安装板105均铰接在升降座92上，移动座101的侧边安装有第三电机102，第三电机102的输出轴连接有套筒103，套筒103内通过螺纹套接有第三丝杆104，第三丝杆104铰接在第一安装板105上。
第一电机81带动第一丝杆82转动，第一丝杆82通过与第一滑块83之间的螺纹传动可带动滑块83平移，从而可带动红外激发光源3平移；第二电机91带动第二丝杆93转动，第二丝杆93通过与升降座92之间的螺纹传动可带动升降座92在竖直方向移动，从热可带动红外激发光源3在竖直方向移动；第三电机102带动套筒103转动，套筒103通过与第三丝杆104之间的螺纹传动可推动第三丝杆104沿套筒103轴心线移动，从而可带动第一安装板105转动，从而可调整红外激发光源3的角度。
本发明通过第一平移机构8可调整红外激发光源3的水平位置，通过升降机构9可调整红外激发光源3的高度位置，通过转向机构10可调整红外激发光源3的角度位置，由于第一平移机构8、升降机构9、转向机构10均采用丝杆传动，可充分利用丝杆传动的精确性可自锁性，保证调节的精准和稳定；同时通过第二平移机构11可调整工业相机4的水平位置，提高了整体使用的灵活性，调节方便。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同范围限定。

Claims (1)

  1. 一种红外激发成像装置，其特征在于,包括：
    被拍摄物，所述被拍摄物上设有红外激发油墨；
    红外激发光源，所述红外激发光源发出的光线照射在红外激发油墨上；
    工业相机，所述工业相机上设有红外激发成像镜头，所述红外激发成像镜头朝向所述红外激发油墨，所述红外激发成像镜头与被拍摄物之间的光路中设有红外截止滤镜。
    2、如权利要求1所述的红外激发成像装置，其特征在于，所述红外激发光源包括一设有球面凹槽的壳体，所述球面凹槽内设有至少两颗红外LED 灯珠，所述红外LED 灯珠上设有聚光镜，所述红外LED 灯珠发出的光线聚焦到红外激发油墨上。
    3、如权利要求1所述的红外激发成像装置，其特征在于，所述红外LED 灯珠的数量为8颗，所述红外LED 灯珠布设在同心圆上。
    4、如权利要求1所述的红外激发成像装置，其特征在于，所述红外截止滤镜设置在红外激发成像镜头的前端和/或后端。
    5、如权利要求1所述的红外激发成像装置，其特征在于，所述工业相机通过第二平移机构安装在顶板上，所述顶板通过支撑板连接有底座，所述底座上通过第一平移机构、升降机构、转向机构与红外激发光源连接。
    6、如权利要求5所述的红外激发成像装置，其特征在于，所述第二平移机构包括电动推杆，所述电动推杆的推杆固定有第二滑块，所述第二滑块滑动安装在顶板上，所述第二滑块的侧边固定有第二安装板，所述工业相机安装在第二安装板上。
    7、如权利要求5所述的红外激发成像装置，其特征在于，所述第一平移机构包括第一电机，所述第一电机的输出轴连接有第一丝杆，所述第一丝杆上通过螺纹套接有第一滑块，所述第一滑块滑动安装在底座上，所述第一滑块的侧边固定有移动座。
    8、如权利要求7所述的红外激发成像装置，其特征在于，所述升降机构包括第二电机和导柱，所述第二电机和导柱安装在移动座上，所述第二电机的输出轴连接有第二丝杆，所述第二丝杆上通过螺纹套接有升降座，所述导柱滑动贯穿升降座。
    9、如权利要求8所述的红外激发成像装置，其特征在于，所述转向机构包括转动座和第一安装板，所述移动座和第一安装板均铰接在升降座上，所述移动座的侧边安装有第三电机，所述第三电机的输出轴连接有套筒，所述套筒内通过螺纹套接有第三丝杆，所述第三丝杆铰接在第一安装板上。
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