WO2012069013A1 - 测径仪光源装置 - Google Patents

测径仪光源装置 Download PDF

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Publication number
WO2012069013A1
WO2012069013A1 PCT/CN2011/082959 CN2011082959W WO2012069013A1 WO 2012069013 A1 WO2012069013 A1 WO 2012069013A1 CN 2011082959 W CN2011082959 W CN 2011082959W WO 2012069013 A1 WO2012069013 A1 WO 2012069013A1
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Prior art keywords
light source
mirror
reflecting
wire
tested
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PCT/CN2011/082959
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English (en)
French (fr)
Inventor
娄霆
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合肥市百胜科技发展股份有限公司
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Priority claimed from CN201010562691.6A external-priority patent/CN102168949B/zh
Application filed by 合肥市百胜科技发展股份有限公司 filed Critical 合肥市百胜科技发展股份有限公司
Priority to EP11843409.1A priority Critical patent/EP2645054B1/en
Publication of WO2012069013A1 publication Critical patent/WO2012069013A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
    • G01B11/10—Measuring arrangements characterised by the use of optical techniques for measuring diameters of objects while moving
    • G01B11/105—Measuring arrangements characterised by the use of optical techniques for measuring diameters of objects while moving using photoelectric detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/2433—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring outlines by shadow casting

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  • the invention relates to a dynamic measuring technology, in particular to a caliper device for online real-time measurement of a rod and a wire during a rolling process of a bar wire in a metallurgical industry.
  • a rack composed of a bracket and a main disc body is disposed, and a light source and a corresponding camera, a so-called probe assembly, are disposed on the rack, and the light source and the corresponding camera are radially arranged one-to-one correspondingly in a circumferential direction.
  • the basic structure of the above scheme belongs to a fixed rack, that is to say, the rack can only perform horizontal and vertical displacement adjustment in a small range, and the rack remains fixed after the adjustment, of course, the light source and the corresponding camera are also measured.
  • the defects of the above scheme are mainly manifested in: 1.
  • the light source and the camera need to be evenly arranged in multiple groups. Even more accurate the measurement is actually difficult to achieve.
  • the above-mentioned fixed caliper device has low measurement accuracy.
  • the number of probes given in the embodiment is at least 7, so that the cost of the optical component is inevitably increased, and the wiring is difficult; at the same time, the placement of the roller under the frame in the rolling shop cannot be maintained. The position is stable because the vibration in the production workshop is very strong, the roller is very easy to displace, and the device can be measured almost without any displacement or jumping.
  • the technical solution adopted by the present invention is: a caliper light source device, characterized in that: a rotating chassis disposed in the chassis and driven by the driving mechanism has a through hole for the wire material to pass through.
  • the two collimated parallel beams are respectively incident on the two reflecting sheets of the mirror, and the collimated parallel beams emitted from the two reflecting sheets are incident on the bar material to be tested passing through the middle of the through hole, on the two reflecting sheets.
  • the illuminated area of the collimated parallel beams emitted in the radial direction of the bar material is larger than the area of the parallel beam of one of the two individual reflectors in the radial direction.
  • the measurement provided by the present invention belongs to dynamic measurement, so that the light source maintains a stable parallel beam and rotates around the material of the wire to be tested to perform omnidirectional illumination on the entire contour of the periphery, so that the imaging device can be Obtaining all the information of the rod material to be tested, thereby obtaining complete size information of the rod material to be tested, thereby providing a basic guarantee for obtaining the real size of the rod material to be tested, thereby improving the measurement accuracy of the caliper; Since the light source is disposed on the rotating chassis, which is a rotating motion component, the use of a larger size mirror will occupy the arrangement of other components, and the large-sized mirror will have sufficient precision to obtain sufficient precision.
  • the invention adopts a reasonable combination of two reflectors to provide a large area of illumination range, that is, the illumination area of the parallel beam superposed in the radial direction of the bar material is larger than the radial area of the parallel beam of one of the single reflectors, thus Solving the problem of space placement of components significantly reduces product cost and mirrors Quality and accuracy are reliable guarantee.
  • Figure 1 is a schematic view of the structure of the present invention
  • FIG. 2 is a schematic perspective view of a mirror.
  • the caliper includes a chassis 1 in which a bearing member for rotating and supporting the rotation of the rotating chassis 2 and a driving mechanism for driving the rotation of the rotating chassis 2 are disposed.
  • the drive mechanism can be supplied with torque by a motor.
  • the rotating chassis 2 is provided with a light source device and an imaging device, and the imaging device mainly includes a CCD camera or the like.
  • the parallel light beam emitted by the light source collimating mirror 20 is always directed to the wire material of the rod to be tested, so that when the material of the rod to be tested passes through the area illuminated by the parallel light, the shadow is generated by the light blocking, so that the high resolution is achieved.
  • the linear array CCD camera 4 has a dark area, and the dark area reflects the size of the object to be measured.
  • the high-resolution linear array CCD camera 4 transmits the collected signal to the central processing unit, after calculation and conversion. It is the actual diameter parameter of the measured object.
  • the present invention has been devised to provide parallel light as described above to improve and ensure measurement accuracy and reliability.
  • the specific embodiments are described in detail below.
  • the rotating chassis 2 disposed in the chassis 1 and driven by the driving mechanism has a through hole 3 through which the wire material passes, and the two collimated parallel beams are incident on the mirror 30, respectively.
  • the collimated parallel light beams emitted from the two reflecting sheets 30a, 30b are incident on the bar material to be tested passing through the middle of the through hole 3, and the two reflecting sheets 30a, 30b are placed on the two reflecting sheets 30a, 30b.
  • the illuminated area in which the collimated parallel beams are superimposed in the radial direction of the bar material is larger than the area in which the parallel beams of one of the two individual reflectors 30a, 30b are illuminated in the radial direction.
  • the specific solution is that the parallel beam reflected by the mirror 30 is perpendicular to the traveling direction of the rod material to be tested and the irradiation range of the beam in the radial direction is larger than the diameter of the rod material to be tested.
  • the parallel beams reflected on the two reflecting sheets 30a, 30b are superimposed on each other in the radial direction of the rod material to be tested, and the range of the radial area of the light irradiated onto the rod material to be tested is almost doubled to ensure the large diameter material. measuring. In this way, the measurement of large-diameter material can be completed under the condition of selecting small-sized optical components, and the product cost is significantly reduced, and the symmetrical arrangement of the components is facilitated to meet the dynamic balance requirements.
  • the mirror 30 has two reflective sheets 30a, 30b.
  • the reflective sheets 30a, 30b are rectangular reflecting surfaces and the reflected light is directed to the position of the rod material to be tested.
  • the short edges of the two reflecting sheets 30a, 30b are close to each other.
  • Cross-arranged, and the reflective surfaces of the two are parallel to the traveling direction of the rod material to be tested, and the light source collimating mirror 20 and the LED light source lamp 10 are respectively arranged corresponding to the two reflecting sheets 30a, 30b, and the light source collimating mirror
  • a light reflecting mirror 40 and a mirror 30 are respectively disposed on the light-incident side and the light-emitting side of the light source 40, and the LED light source lamp 10 is located at the outer edge of the light source collimating mirror 20 near the disk surface of the rotating chassis 2, and the LED light source lamp 10 Pointing to the mirror 40.
  • a light reflecting mirror 40 is disposed on the disk surface of the rotating chassis 2 on the light-incident side of the light source collimating mirror 20, and the LED light source lamp 10 is directed to the reflecting light mirror 40, and the optical path is shortened by the reflecting light mirror 40, thereby reducing The collimated light source optical system space.
  • the function of the light source collimating mirror 20 is to collimate the light emitted by the LED light source into a parallel beam.
  • a mirror 30 is disposed on the disk surface of the rotating chassis 2 on the light-emitting side of the light source collimating mirror 20, and the parallel light beam reflected by the mirror 30 is directed to the material of the wire to be tested passing through the middle of the through hole 3, specifically
  • the parallel light beams emitted from the light source collimating mirror 20 are turned by the mirror 30 at an angle of 90 degrees to be irradiated onto the object to be measured.
  • the light is supplied from the LED light source lamp 10, and is incident on the mirror 30 via the reflecting mirror 40 and the light source collimating mirror 20.
  • the light during this period is deviated from the direction of the light reflected by the mirror 30. That is to say, on the light source side, only the light reflected by the mirror 30 directly points to the position of the object to be measured, and the rest of the light is deviated from the position of the object to be measured and is at the largest possible offset position, thereby maximally ensuring the imaging light source. Uniformity, so as to avoid other light rays from being hit by the measured object to interfere with the imaging effect, thus ensuring the image quality.
  • the mirror of the present invention uses the reflected light mirror 40 and the mirror 30 to reflect twice to shorten the optical path, thereby reducing the space of the collimated light source optical path system.
  • the color of the parallel light beam and the color of the wire material to be tested have a color difference that is easy to identify.
  • the LED light source lamp 10 selects a light source color of less than 600 nm, preferably a blue light source, so as to prevent high temperature objects from emitting infrared rays. Interference, which facilitates the identification and processing of imaging.
  • the short edges of one end of the two retroreflective sheets 30a and 30b are arranged in a cross-symmetric cross arrangement, and the angle bisectors of the two are directed to the center of the through hole 3, so as to ensure the rod wire to be tested.
  • the middle of the material is also within the imaging area to obtain complete information on the rod material to be tested.
  • the mirror 30 includes two plane reflecting mirrors, that is, the reflecting sheets 30a, 30b, which are mutually collimated.
  • the two reflecting sheets 30a, 30b are mounted on the circular rotating chassis 1, and the two reflecting sheets 30a, 30b are vertically oriented. (hereinafter referred to as the vertical direction) is vertically distributed.
  • the short sides of the two reflective sheets 30a, 30b are perpendicular to the disk surface of the rotating chassis 2, and the two reflective sheets 30a, 30b are optically connected to the mirror.
  • the parallel beams emitted by the light source collimating mirror 20 are respectively turned to 90 degrees, and the parallel beams that become the same direction are radially superimposed and irradiated onto the object to be measured, thereby providing a light source for imaging measurement.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Description

测径仪光源装置
技术领域
本发明涉及动态测量技术，具体涉及冶金行业棒线材轧制过程中对棒线材进行在线实时测量的测径装置。
背景技术
棒线材在线测量至今仍然是冶金行业中的一个难题。对于螺纹钢或圆钢之类的线材目前也有相关的测量设备，如天津市兆瑞测控技术有限公司提供的相关测径仪设备就是非接触式在线检测设备，有关技术内容在其专利中均有记载，名称为“高精度防尘测径仪”（ZL200520123889）、“固定测头式线、棒材测径仪（ZL200520123887.X）”及“可实现径向调整的测径仪”（ZL200520123888.4）等，上述技术方案中设置了由支架和主盘体构成的机架，机架上设置光源和对应的相机即所谓的探头组件，光源和对应的相机径向一一对应周向均匀布置多组，机架上有通孔供线材通过，这样就实现了对棒线材的照相装置。上述方案的基本构造是属于固定式的机架，就是说机架只能够在小范围内实施水平和垂直方向的位移调节，调节完毕后机架保持固定，当然在测量时光源和对应的相机也是固定的，上述方案存在的缺陷主要表现在：1、光源和相机需要均匀布置多组，甚至说越多测量越精确，实际上是难以实现的，当然上述固定式的测径装置测量精度低是必然；其实施例中给出的探头数目至少7个，这样就必然显著增加光学元件的成本，且给布线带来困难；同时，机架下方采用滚轮支撑的方式在轧钢车间内放置是无法保持位置稳定的，因为，生产车间的震动十分强烈，滚轮十分容易位移，设备只要出现少许位移或跳动，几乎可以说就无法测量了。
发明内容
本发明的目的是提供一种测径仪光源装置，提供稳定的光源以提高测量的可靠性和精度，同时确保在有限空间内提供照射区域大的光束以满足多种规格待测线棒材物料测量需要。
为实现上述目的，本发明采用的技术方案是：一种测径仪光源装置，其特征在于：设置在机箱内的由驱动机构驱动其转动的转动底盘上有供线棒材物料通过的通孔，两路准直的平行光束分别入射到反光镜的两个反光片上，由两个反光片上发出的准直的平行光束入射到通孔中部通过的待测线棒材物料上，两个反光片上发出的准直的平行光束沿线棒材物料径向方向叠加后的照射区域大于两单个反光片之一的平行光束在径向方向上的照射区域。
由上述技术方案可知，本发明提供的测量属于动态测量，所以光源保持稳定的平行光束且绕着待测棒线材物料为中心转动对其周边整体轮廓实施全方位的照射，所以在成像装置上可以获得待测棒线材物料的全部信息，从而可以获得待测棒线材物料完整的尺寸信息，从而为获取待测棒线材物料的真实尺寸提供了基本保证，进而提高了测径仪的测量精度；另外，由于光源是设置在作转动运动的部件即转动底盘上的，采用较大尺寸的反光镜将会占用其它零部件的布置，而且大尺寸的反光镜要想获得足够的精度就会大大加之成本，本发明采用两个反光片的合理组合提供了大区域的照射范围，即平行光束沿线棒材物料径向方向叠加后的照射区域大于单个反光片之一的平行光束的径向区域，这样既解决了部件的空间布置问题有显著地降低了产品成本，并且镜面的质量和精度均有可靠的保证。
附图说明
图1是本发明的结构示意图；
图2是反光镜的立体结构示意图。
具体实施方式
为便于说明，先对测径仪的基本结构和原理简要说明如下：测径仪包括机箱1，机箱1内设置有用于转动支撑转动底盘2转动的轴承件以及驱动转动底盘2转动的驱动机构，驱动机构可以由电机提供转矩。转动底盘2上设置有光源装置和成像装置，成像装置主要包括CCD摄像头等。转动底盘2转动时，光源准直镜20射出的平行光束始终指向待测棒线材物料上，这样当待测棒线材物料通过平行光线照射的区域后，由于挡光产生阴影，这样在在高分辨率线阵CCD摄像头4就出现了暗区，暗区就反映了被测物体的尺寸，高分辨率线阵CCD摄像头4将收集到的这种信号传送至中央处理器，经过计算处理后，转换为被测物的实际直径参数。
本发明就是为提供上述平行光线而设计的，以提高并确保测量精度和可靠性。以下对具体实施方式进行详细说明。
如图1、2所示，设置在机箱1内的由驱动机构驱动其转动的转动底盘2上有供线棒材物料通过的通孔3，两路准直的平行光束分别入射到反光镜30的两个反光片30a、30b上，由两个反光片30a、30b上发出的准直的平行光束入射到通孔3中部通过的待测线棒材物料上，两个反光片30a、30b上发出的准直的平行光束沿线棒材物料径向方向叠加后的照射区域大于两单个反光片30a、30b之一的平行光束在径向方向上照射的区域。
优选而具体的方案就是：所述的反光镜30反射的平行光束与待测棒线材物料的行进方向垂直且光束在径向方向上的照射范围大于待测棒线材物料的直径。
上述两反光片30a、30b上反射的平行光束在待测棒线材物料径向方向上相互叠加，该光线照射到待测棒线材物料上的径向区域范围几乎增加一倍，保证大直径物料的测量。这样就可以选择小规格尺寸的光学元器件的情况下完成大规格直径物料的测量，同时显著降低产品成本，另外方便零部件的对称布置，便于满足动平衡要求。
所述的反光镜30有两片反光片30a、30b构成，反光片30a、30b为长方形的反光面且反射光指向待测棒线材物料位置处，两反光片30a、30b的一端短边接近并交叉布置，且两者的反光面与待测棒线材物料的行进方向平行，光源准直镜20和LED光源灯10对应于两反光片30a、30b各布置一组，所述的光源准直镜20的进光侧和出光侧分别设置反射光镜40和反光镜30，所述的LED光源灯10位于光源准直镜20外侧的靠近转动底盘2的盘面边缘处，所述的LED光源灯10指向反射光镜40。所述的光源准直镜20的进光侧的转动底盘2的盘面上设置反射光镜40，所述的LED光源灯10指向反射光镜40，通过反射光镜40来缩短光路，从而减小了准直光源光路系统空间。光源准直镜20的作用就是将LED光源发出的光线准直成平行光束。
所述的光源准直镜20的出光侧的转动底盘2的盘面上设置反光镜30，所述的反光镜30反射的平行光束指向通孔3中部通过的待测棒线材物料上，具体讲就是将光源准直镜20射出的平行光束通过反光镜30转向90度角，照射到被测物体上。
如图1所示，光线由所述的LED光源灯10提供，并经由反射光镜40、光源准直镜20入射到反光镜30，这期间的光线均与反光镜30反射的光线方向相互偏离，就是说在光源侧，只有反光镜30反射的光线直接指向被测物体所在位置，其余光线均与被测物体所在位置相互偏离且处在尽可能大的偏离位置，最大限度地保证成像光源的单一性，这样就避免其它光线射向被测物体对成像效果产生干扰，从而确保成像质量。
另外，因为远心成像光路需要大的景深，所以光束数值孔径要小。因为远心成像的光路需要远心的照明光路，所以小的数值孔径的照明光束要求有长焦距的准直透镜。在一定的测径仪体积的限制下，本发明设置反射镜即利用反射光镜40、反光镜30两次反射来缩短光路，从而减小了准直光源光路系统空间。
所述的平行光束的颜色与待测棒线材物料的颜色存在便于识别的色差，优选方案就是所述的LED光源灯10选用小于600nm波段光源色，优选蓝色光源，这样可以避免高温物体发射红外线的干扰，这样有利于成像的识别和处理。
如图1、2.所示，所述的两反光片30a、30b的一端短边处构成十字对称交叉状布置，两者的角平分线指向通孔3的中心，这样可以保证待测棒线材物料的中部也在成像区域范围内，从而获得待测棒线材物料的完整信息。
结合图2，反光镜30包括相互准直的两块平面反射镜片即反光片30a、30b，两块反光片30a、30b安装在圆形的转动底盘1上，两块反光片30a、30b垂直方向（以下简称垂直方向）上呈上下分布，具体安装时，两块反光片30a、30b的短边与转动底盘2的盘面保持垂直，两块反光片30a、30b光路入口反射镜将两个相对的由光源准直镜20出射的平行光束分别转向90度，变成同一方向的平行光束径向叠加后照射到被测物体上，为成像测量提供光源。

Claims (7)

  1. 一种测径仪光源装置，其特征在于：设置在机箱（1）内的由驱动机构驱动其转动的转动底盘（2）上有供线棒材物料通过的通孔（3），两路准直的平行光束分别入射到反光镜（30）的两个反光片（30a）、（30b）上，由两个反光片（30a）、（30b）上发出的准直的平行光束入射到通孔（3）中部通过的待测线棒材物料上，两个反光片（30a）、（30b）上发出的准直的平行光束沿线棒材物料径向方向叠加后的照射区域大于两单个反光片（30a）、（30b）之一的平行光束在径向方向上的照射区域。
  2. 根据权利要求1所述的测径仪光源装置，其特征在于：所述的反光镜（30）反射的平行光束与待测棒线材物料的行进方向垂直且光束在径向方向上的照射范围大于待测棒线材物料的直径。
  3. 根据权利要求1所述的测径仪光源装置，其特征在于：所述的反光镜（30）有两片反光片（30a）、（30b）构成，反光片（30a）、（30b）为长方形的反光面且反射光指向待测棒线材物料位置处，两反光片（30a）、（30b）的一端短边接近并交叉布置，且两者的反光面与待测棒线材物料的行进方向平行，光源准直镜（20）和LED光源灯（10）对应于两反光片（30a）、（30b）各布置一组，所述的光源准直镜（20）的进光侧和出光侧分别设置反射光镜（40）和反光镜（30），所述的LED光源灯（10）位于光源准直镜（20）外侧的靠近转动底盘（2）的盘面边缘处，所述的LED光源灯（10）指向反射光镜（40）。
  4. 根据权利要求1或2所述的测径仪光源装置，其特征在于：所述的平行光束的颜色与待测棒线材物料的颜色存在便于识别的色差。
  5. 根据权利要求4所述的测径仪光源装置，其特征在于：所述的LED光源灯（10）选用小于600nm波段光源色，优选蓝色光源。
  6. 根据权利要求3所述的测径仪光源装置，其特征在于：所述的两反光片（30a）、（30b）的一端短边处构成十字对称交叉状布置，两者的角平分线指向通孔（3）的中心。
  7. 根据权利要求6所述的测径仪光源装置，其特征在于：两块反光片（30a）、（30b）安装在圆形的转动底盘（2）上，两块反光片（30a）、（30b）镜面垂直且呈上下分布，两块反光片（30a）、（30b）光路入口反射镜将两个相对的由光源准直镜（20）出射的平行光束分别转向90度，变成同一方向的平行光束径向叠加后照射到被测物体上。
PCT/CN2011/082959 2010-11-27 2011-11-25 测径仪光源装置 WO2012069013A1 (zh)

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