WO2013071808A1 - 摩擦布检查装置及摩擦布检查方法 - Google Patents

摩擦布检查装置及摩擦布检查方法 Download PDF

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Publication number
WO2013071808A1
WO2013071808A1 PCT/CN2012/083238 CN2012083238W WO2013071808A1 WO 2013071808 A1 WO2013071808 A1 WO 2013071808A1 CN 2012083238 W CN2012083238 W CN 2012083238W WO 2013071808 A1 WO2013071808 A1 WO 2013071808A1
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WO
WIPO (PCT)
Prior art keywords
rubbing
rubbing cloth
base
friction
roller
Prior art date
Application number
PCT/CN2012/083238
Other languages
English (en)
French (fr)
Inventor
胡勇
郭红光
汪剑成
杨端
王彪
张龙
Original Assignee
京东方科技集团股份有限公司
合肥京东方光电科技有限公司
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Publication date
Application filed by 京东方科技集团股份有限公司, 合肥京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US13/703,662 priority Critical patent/US8978485B2/en
Publication of WO2013071808A1 publication Critical patent/WO2013071808A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133784—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by rubbing
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

Definitions

  • the present disclosure relates to the field of manufacturing liquid crystal displays, and more particularly to a rubbing cloth inspection device and a wiping cloth inspection method. Background technique
  • the orientation of liquid crystal molecules is usually preliminarily treated by a rubbing process.
  • the main process of the rubbing process includes: placing a substrate coated with a polyimide (PI) film (also referred to as an oriented film) on a carrying platform; a friction roller having a surface pre-wound with a rubbing cloth at a preset speed Rolling on the carrying platform to drive the rubbing cloth to roll from the surface of the oriented film on the substrate under a certain pressure; during the rolling of the rubbing cloth, the fibers on the surface of the rubbing cloth interact with the surface of the oriented film, in the oriented film A groove is formed on the upper surface.
  • PI polyimide
  • the substrate is placed on the other substrate and the liquid crystal (LC) molecules are injected between the two substrates. Since the LC molecules and the oriented film form an anchoring energy (Anchoring Energy), the LC molecules can be arranged in the order of the orientation of the grooves, so that the arrangement of the LC molecules in the alignment film reaches the pretilt angle requirement.
  • LC liquid crystal
  • the friction effect directly determines the uniformity of the alignment of the liquid crystal molecules, thereby affecting the picture display quality of the liquid crystal display.
  • a defect on the surface of the rubbing cloth such as uneven thickness of the rubbing cloth, foreign matter adhering to the surface, and impurities in the weaving process of the rubbing cloth, these defects may affect the uniformity of the rubbing orientation of the corresponding position, thereby affecting the orientation property.
  • the prior art checks the quality of the rubbing cloth by rubbing the PI-coated Indium-Tin Oxide (ITO) glass, and then rubbing the surface of the rubbed glass with the steam inspection device. Traces were visually inspected. Under this method, the surface condition of the rubbing cloth can only be roughly expressed, and the defect points on the rubbed cloth that are inspected cannot directly correspond to the rubbing cloth, and the inspection result differs due to the examiner, and It is possible that the judgment of the surface condition of the rubbing cloth is affected by the surface condition of the glass. Summary of the invention The technical problem to be solved by the present disclosure is to provide a rubbing cloth inspection device and a rubbing cloth inspection method, which improve the accuracy of inspection of the surface defects of the rubbing cloth.
  • ITO Indium-Tin Oxide
  • a rubbing cloth inspection apparatus comprising: a base, the surface of the base is provided with a pressure sensing device; a bracket; rotatably supporting friction above the surface of the abutment by the bracket a roller, the friction cloth can be wound around the outer circumference of the friction roller, wherein when the friction roller rotates, the friction cloth rubs against the surface of the base, and the pressure sensing device can detect that the friction cloth is applied to the surface of the base The pressure sensing signal of the pressure at each detection point.
  • the bracket when the friction roller rotates, can move perpendicular to the axial direction of the friction roller and parallel to the surface of the base plate, so that the positions of the detection points on the surface of the base plate and the friction cloth are The position of the point is - corresponding.
  • the friction roller is movable by the bracket in a direction perpendicular to the surface of the base.
  • the rubbing cloth inspection device may further include signal processing means for converting the pressure sensing signals of the detection points on the surface of the base to the pressure values of the detection points, and determining according to the distribution of the pressure values of the detection points.
  • the defect point of the rubbing cloth may further include signal processing means for converting the pressure sensing signals of the detection points on the surface of the base to the pressure values of the detection points, and determining according to the distribution of the pressure values of the detection points.
  • the signal processing device calculates an average of the pressure values of all the detected points, and determines the defect points of the rubbing cloth according to the difference between the pressure values of the respective detecting points and the average value.
  • the signal processing device may also output the pressure value of each of the detection points to the display device for display.
  • the pressure sensing device is a sensor network composed of a piezoelectric material.
  • the piezoelectric material may be ammonia dihydrogen phosphate.
  • the rubbing cloth inspection device may further include control means for controlling a moving speed of the carriage, a rotational speed of the rubbing roller, and a distance between the rubbing roller and the surface of the base.
  • a rubbing cloth inspection method comprising: winding a rubbing cloth on an outer circumference of a rubbing roller; rotating the rubbing roller to rub the rubbing cloth against a base surface of the abutment, the abutment
  • the surface is provided with a pressure sensing device; and a pressure sensing signal detected by the pressure sensing device to indicate the pressure exerted by the friction cloth on each detection point of the surface of the base.
  • the rubbing cloth inspection method may further include: converting a pressure sensing signal of each detecting point on the surface of the base to a pressure value, and determining a defect point of the rubbing cloth according to a distribution of pressure values of the detecting points.
  • the rubbing cloth inspection method may further include: converting a pressure sensing signal of each detecting point on the surface of the base to a pressure value, and outputting the result to a display device for display.
  • the rubbing cloth inspection method further comprises: adjusting a distance between the rubbing roller and the surface of the base before starting to rotate the rubbing roller.
  • FIG. 1 is a schematic structural view of a rubbing cloth inspection apparatus according to an embodiment of the present disclosure
  • FIG. 2 is a flow chart showing a method of inspecting a rubbing cloth according to an embodiment of the present disclosure. detailed description
  • Embodiments of the present disclosure provide a pressure-sensitive friction cloth inspection device and a friction cloth inspection method, wherein when a friction cloth rubs over a pressure sensing inspection base, a pressure sensing base can detect a pressure sensing signal, and the pressure sensing signal By performing the conversion and analysis, it is possible to determine the defect points on the rubbing cloth. This improves the accuracy of the inspection of the surface defects of the rubbing cloth. Further, it is also possible to display the distribution of the pressure values of the respective detection points in real time in the display device, thus realizing real-time inspection of the surface defects of the friction cloth.
  • the rubbing cloth inspection apparatus of the embodiment of the present disclosure may include:
  • the surface of the base 10 is provided with a pressure sensing device 11;
  • a rubbing roller 30 rotatably mounted on the bracket 20, the rubbing cloth 40 may be wound around the outer circumference of the rubbing roller 30.
  • the pressure sensing device 11 can detect a pressure sensing signal indicating the pressure exerted by the rubbing cloth 40 on each detecting point of the surface of the base.
  • the friction roller 30 can be moved up and down along the bracket 20, i.e., in a direction perpendicular to the surface of the abutment to adjust the distance between the friction roller 30 and the surface of the abutment.
  • the pressure sensing device 11 can output the pressure sensing signal to a signal processing device (not shown) for processing.
  • the signal processing device may be disposed in the rubbing cloth inspection device or may be disposed separately from the rubbing cloth inspection device.
  • the signal processing device can convert the pressure sensing signals of the detection points on the surface of the base 10 into pressure values, and determine the defect points of the friction cloth according to the distribution of the pressure values of the detection points.
  • the signal processing device may first calculate an average value of pressure values of all detection points, and then, for each detection point, calculate a difference between the pressure value of the detection point and the average value, when the difference is When the threshold is greater than the preset threshold, the detection point is abnormal and the coordinates of the abnormal point are output.
  • the bracket 20 is configured to be movable perpendicular to the axial direction of the friction roller 30 and parallel to the surface of the base 10 when the friction roller 30 is rotated, such that each detection point on the surface of the base 10
  • the position corresponds to the position of each point on the rubbing cloth 40. Since the position of the detection point corresponds to the position of the point on the friction cloth, the point on the rubbing cloth corresponding to the abnormality detecting point is the defect point of the friction cloth.
  • embodiments of the present disclosure are not limited to configuring the bracket 20 to move parallel to the surface of the base 10 when the friction roller 30 is rotated.
  • the bracket 20 is configured not to move parallel to the surface of the base
  • the unfolding of the pressure sensing signal detected by the pressure sensing device 11 at the same detection point on the time axis corresponds to the circumference of the friction cloth 40 along the friction roller 30.
  • Towards various points. by analyzing the change of the pressure sensing signal at each detection point with time, it is possible to determine the defect point on the rubbing cloth corresponding to the abnormal detecting point.
  • the signal processing device may directly output the pressure value to the display device for display.
  • the display coordinates correspond to the coordinates of each point on the rubbing cloth, and the pressure value display result of each point may be displayed as a different gray scale according to the magnitude range of the pressure value, or may be displayed as different In this way, the point at which the gradation abnormality or the color abnormality in the screen is displayed corresponds to the defect point of the rubbing cloth.
  • the pressure sensing device 11 may be a sensor network composed of a piezoelectric material, which may be dihydrogen phosphate or other known piezoelectric material. Further, the pressure sensing device 11 may be other known devices capable of acquiring a pressure sensing signal.
  • the base 10 can be placed on a carrying structure 50, and the bracket 20 It may be a gantry that can be driven by a first transmission mechanism provided in the rubbing cloth inspection device and moved in a direction parallel to the surface of the base 10 by a guide rail provided on the load-bearing structure 50.
  • a second transmission mechanism and a third transmission mechanism may be further included, and the friction roller 30 is rotated by the second transmission mechanism, and the friction roller is driven by the third transmission mechanism. 30 moves up and down along the bracket 20, so that the friction roller 30 can be brought into contact with the surface of the base 10. When the friction roller 30 rotates, the friction cloth 40 wound around the outer circumference thereof faces the surface of the base 10. Rubbing and generating pressure.
  • a control device capable of receiving an input or setting of a user, and controlling a moving speed of the bracket 20 according to the input or setting (by controlling the first transmission)
  • the mechanism realizes) the rotation speed of the friction roller 30 (by controlling the second transmission mechanism) and the distance between the friction roller 30 and the surface of the base 10 (by controlling the third transmission mechanism) ).
  • a parameter setting panel 60 may be provided in the rubbing cloth inspection device, the user setting is obtained through the parameter setting panel 60, and the user's setting is output to the control device.
  • Step 201 winding a friction roller on the outer circumference of the friction roller, and fixing the friction roller on the bracket;
  • Step 202 setting a distance between the friction roller and the surface of the base when the friction is applied through the parameter setting panel, the rotation speed of the friction roller, and the bracket Relative to the moving speed of the base, for example, 0.45 mm, 1200 RPM, 50 mm/s;
  • Step 203 rotating the rubbing roller so that the rubbing cloth rubs the abutment surface inspection device of the abutment provided with the pressure sensing device; and moving the bracket perpendicular to the axial direction of the rubbing roller and parallel to the surface of the abutment;
  • Step 204 the pressure sensing device detects a pressure sensing signal, and outputs the pressure sensing signal to the signal processing device;
  • Step 205 The signal processing device converts the pressure sensing signals of the detection points on the surface of the base platform into pressure values, and determines the defect points of the friction cloth according to the distribution of the pressure values of the detection points.
  • the signal processing device may first calculate an average value of pressure values of all detection points, Then, for each detection point, calculating a difference between the pressure value of the detection point and the average value, when the difference is greater than a preset threshold, determining the detection point abnormality, and setting the coordinates of the abnormal point Output.
  • the carriage is moved perpendicular to the axial direction of the friction roller and parallel to the surface of the abutment when the friction roller rotates, such that the position of each detection point on the surface of the abutment and the position of each point on the friction cloth Presented - corresponding. Since the position of the detection point is corresponding to the position of the point on the rubbing cloth, the point on the rubbing cloth corresponding to the abnormal detecting point is the defect point of the rubbing cloth.
  • embodiments of the present disclosure are not limited to moving the bracket perpendicular to the axial direction of the rubbing roller and parallel to the surface of the abutment when the rubbing roller rotates.
  • the unfolding of the pressure sensing signal detected by the pressure sensing device at the same detection point on the time axis corresponds to each point of the rubbing cloth along the circumferential direction of the rubbing roller.
  • the signal processing device may directly output the pressure value to the display device for display.
  • the display coordinates correspond to the coordinates of each point on the rubbing cloth, and the pressure value display result of each point may be displayed as a different gray scale according to the magnitude range of the pressure value, or may be displayed as different In this way, the point at which the gradation abnormality or the color abnormality in the screen is displayed corresponds to the defect point of the rubbing cloth.
  • the defect of the surface of the rubbing cloth is inspected by means of pressure sensitivity. Since the abnormal value of the pressure value corresponds to the surface defect of the rubbing cloth, an accurate inspection of the surface defect of the rubbing cloth can be achieved. In addition, since it is not necessary to use an inspection material such as a PI liquid or an ITO glass, the influence of the difference in the inspection material on the inspection result can be reduced, and the inspection cost can be saved.

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  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
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Abstract

一种摩擦布（40）检查装置及摩擦布（40）检查方法，所述摩擦布（40）检查装置包括：基台（10），所述基台（10）表面设置有压力感应装置（11）；支架（20）；通过所述支架（20）可旋转地支撑在所述基台（10）表面上方的摩擦辊（30），摩擦布（40）能够缠绕于所述摩擦辊（30）的外周，其中当所述摩擦辊（30）旋转时，所述摩擦布（40）摩擦所述基台（10）表面，所述压力感应装置（11）能够检测到指示摩擦布（40）施加在基台（10）表面的各检测点上的压力的压力感应信号。

Description

摩擦布检查装置及摩擦布检查方法 技术领域
本公开涉及液晶显示器的制造领域， 特别涉及一种摩擦布检查装置及摩 擦布检查方法。 背景技术
在液晶显示器的制造技术中， 通常釆用摩擦工艺对液晶分子取向进行前 期处理。 摩擦工艺主要流程包括： 将涂覆有聚酰亚胺（Polyimide, 简称 PI ) 膜（也称为取向膜） 的基板放置在承载平台上； 表面预先缠绕有摩擦布的摩 擦辊， 以预设转速在承载平台上滚动， 从而带动摩擦布以一定的压力从基板 上的取向膜表面滚过； 在摩擦布滚动的过程中， 摩擦布表面的纤维 （Pile ) 与取向膜表面相互作用， 在取向膜上形成沟槽。 摩擦工艺结束后， 将基板与 另一基板对盒设置并在二个基板之间注入液晶（ Liquid Crystal, 简称 LC )分 子， 由于 LC分子和取向膜之间构成锚定力（Anchoring Energy ), 因此， LC 分子可沿沟槽取向顺序排列，从而使得 LC分子在取向膜内的排列达到预倾 角的要求。
在摩擦工艺中， 摩擦效果的好坏直接决定液晶分子定向排列的均一性， 进而影响液晶显示器的画面显示质量。 当摩擦布的表面存在缺陷时， 例如摩 擦布的不均匀厚度、 粘在表面的异物和摩擦布织染过程中的杂质， 这些缺陷 会影响对应位置摩擦取向的均一性， 从而影响取向性能。
现有技术对摩擦布品质进行检查的方法是， 通过对涂有 PI 的氧化铟锡 ( Indium-Tin Oxide), 简称 ITO )玻璃进行摩擦， 然后利用蒸汽检查装置对摩 擦后的 ΙΤΟ玻璃的表面摩擦痕迹进行目视检查。 在这种方法下只能较为粗略 的表现出摩擦布的表面状况， 对于检查到的摩擦布上的缺陷点不能直接地对 应在摩擦布上， 并且检查结果因为检查者的不同而存在差异， 同时有可能因 为 ΙΤΟ玻璃的表面状况而影响到对摩擦布表面状况的判断。 发明内容 本公开所要解决的技术问题是提供一种摩擦布检查装置及摩擦布检查方 法， 改善对摩擦布表面缺陷的检查的精确度。
根据本公开实施例， 提供一种摩擦布检查装置， 其包括： 基台， 所述基 台表面设置有压力感应装置； 支架； 通过所述支架可旋转地支撑在所述基台 表面上方的摩擦辊， 摩擦布能够缠绕于所述摩擦辊的外周， 其中当所述摩擦 辊旋转时， 所述摩擦布摩擦所述基台表面， 所述压力感应装置能够检测到指 示摩擦布施加在基台表面的各检测点上的压力的压力感应信号。
优选， 当所述摩擦辊旋转时， 所述支架能够垂直于所述摩擦辊的轴向且 平行于所述基台表面移动， 使得所述基台表面上的各检测点的位置与摩擦布 上的点的位置呈——对应。
优选， 所述摩擦辊能够通过所述支架在垂直于所述基台表面的方向上移 动。
所述摩擦布检查装置还可以包括信号处理装置， 用于将所述基台表面各 检测点的压力感应信号转换为各检测点的压力值， 并根据各检测点的压力值 的分布情况， 确定摩擦布的缺陷点。
根据一些实施例，所述信号处理装置计算所有检测点的压力值的平均值， 并根据各检测点的压力值与该平均值之间的差值确定摩擦布的缺陷点。
所述信号处理装置还可以将所述各检测点的压力值输出到显示装置进行 显示。
优选， 所述压力感应装置为由压电材料组成的传感器网络。
所述压电材料可以为磷酸二氢氨。
所述摩擦布检查装置还可以包括控制装置， 用于控制所述支架的移动速 度、 所述摩擦辊的转动速度以及所述摩擦辊与所述基台表面之间的距离。
根据本公开实施例， 还提供一种摩擦布检查方法， 其包括： 将摩擦布缠 绕在摩擦辊的外周上； 旋转所述摩擦辊， 使摩擦布摩擦基台的基台表面， 所 述基台表面设置有压力感应装置； 以及获取所述压力感应装置检测到的、 指 示摩擦布施加在基台表面的各检测点上的压力的的压力感应信号。
优选， 当所述摩擦辊旋转时， 使所述支架垂直于所述摩擦辊的轴向且平 行于所述基台表面移动， 使得所述基台表面上的各检测点的位置与摩擦布上 的点的位置呈——对应。 所述摩擦布检查方法还可以包括： 将所述基台表面各检测点的压力感应 信号转换为压力值， 并根据各检测点压力值的分布情况， 确定摩擦布的缺陷 点。
所述摩擦布检查方法还可以包括： 将所述基台表面各检测点的压力感应 信号转换为压力值后， 输出到显示装置进行显示。
优选， 所述摩擦布检查方法还包括： 在开始旋转所述摩擦辊之前， 调节 所述摩擦辊与所述基台表面之间的距离。 附图说明
为使本公开的目的、 技术方案和优点更加清楚， 下面将结合附图及具体 实施例对本公开进行详细描述， 所述附图中：
图 1为根据本公开实施例的摩擦布检查装置的结构示意图；
图 2为根据本公开实施例的摩擦布检查方法的流程示意图。 具体实施方式
本公开实施例提供一种压力感应式摩擦布检查装置及摩擦布检查方法， 其中当摩擦布摩擦过压力感应检查基台时， 压力感应基台能够检测到压力感 应信号， 对所述压力感应信号进行转换和分析， 就能够确定摩擦布上的缺陷 点。 这提高了对摩擦布表面缺陷的检查的精确度。 此外， 还能够将各检测点 的压力值的分布情况实时显示在显示装置中， 如此， 实现了对摩擦布表面缺 陷的实时检查。
参照图 1 , 本公开实施例的摩擦布检查装置可以包括：
基台 10, 所述基台 10表面设置有压力感应装置 11 ;
跨设在所述基台 10上方的支架 20;
可旋转地安装在所述支架 20上的摩擦辊 30,摩擦布 40可缠绕于所述摩 擦辊 30的外周。 摩擦辊 30旋转时， 所述摩擦布 40摩擦所述基台 10表面， 并且所述压力感应装置 11能够检测到指示摩擦布 40施加在基台表面的各检 测点上的压力的压力感应信号。
在一些示例中， 所述摩擦辊 30能够沿所述支架 20上下移动， 即沿垂直 于所述基台表面的方向移动， 以便调节摩擦辊 30与基台表面之间的距离。 所述压力感应装置 11检测到压力感应信号后，能够将该压力感应信号输 出到一信号处理装置 （图未示）进行处理。 所述信号处理装置可以设置在所 述摩擦布检查装置中， 也可以与所述摩擦布检查装置分离设置。 所述信号处 理装置可以将所述基台 10表面各检测点的压力感应信号转换为压力值，并根 据各检测点压力值的分布情况， 确定摩擦布的缺陷点。
具体地， 所述信号处理装置可以先计算所有检测点的压力值的平均值， 然后， 对于每个检测点， 计算该检测点的压力值与所述平均值的差值， 当所 述差值大于预设的门限时， 可以确定该检测点异常， 并将该异常点的坐标输 出。
在所示实施例中， 所述支架 20构造成当所述摩擦辊 30旋转时能够垂直 于摩擦辊 30的轴向且平行于基台 10表面移动，使得基台 10表面上的各检测 点的位置与摩擦布 40上的各点的位置呈——对应。由于检测点的位置是与摩 擦布上的点的位置是——对应的， 则异常检测点对应的摩擦布上的点即为摩 擦布的缺陷点。
应该注意的是， 本公开实施例并不限于将支架 20构造为当摩擦辊 30旋 转时平行于基台 10表面移动。 例如， 在支架 20构造为不平行于基台表面移 动的情况下，压力感应装置 11在同一检测点检测到的压力感应信号在时间轴 上的展开即对应于摩擦布 40沿摩擦辊 30的周向的各个点。 这样， 通过分析 各检测点的压力感应信号随时间的变化情况， 能够确定异常检测点所对应的 摩擦布上的缺陷点。
另外， 所述信号处理装置在得到各检测点的压力值后， 还可以直接将所 述压力值输出到显示装置进行显示。 在所述显示装置中， 其显示坐标是与摩 擦布上各点的坐标相对应的， 各点的压力值显示结果可以根据压力值的大小 范围， 显示为不同的灰度， 或者， 显示为不同的颜色， 这样， 显示画面中灰 度异常的点或者颜色异常的点即对应于摩擦布的缺陷点。
在上述摩擦布检查装置中，所述压力感应装置 11可以为由压电材料组成 的传感器网络， 所述压电材料可以为磷酸二氢氨或其他公知的压电材料。 另 夕卜， 所述压力感应装置 11 还可以为其他公知的能够获取压力感应信号的装 置。
在具体实现时， 所述基台 10可以放置在一承载结构 50上， 所述支架 20 可以为一龙门架， 所述龙门架可以通过设置在摩擦布检查装置中的一第一传 动机构带动， 并通过设置在承载结构 50上的导轨沿平行于所述基台 10表面 方向移动。
在上述摩擦布检查装置中，还可包括一第二传动机构和一第三传动机构， 通过所述第二传动机构带动所述摩擦辊 30转动，通过所述第三传动机构带动 所述摩擦辊 30沿所述支架 20上下移动，从而能够使得所述摩擦辊 30与所述 基台 10表面接触， 当所述摩擦辊 30转动时，缠绕在其外周的摩擦布 40对所 述基台 10表面进行摩擦， 并产生压力。
在上述摩擦布检查装置中， 还可包括一控制装置， 所述控制装置能够接 收用户的输入或设置， 根据所述输入或设置来控制所述支架 20 的移动速度 (通过控制所述第一传动机构实现）、 所述摩擦辊 30的转动速度 (通过控制 所述第二传动机构实现） 以及所述摩擦辊 30与所述基台 10表面之间的距离 (通过控制所述第三传动机构实现）。在具体实现时，可以在所述摩擦布检查 装置中设置一参数设置面板 60,通过所述参数设置面板 60获取用户的设置， 并将用户的设置输出到所述控制装置。
下面参照图 2来说明本公开实施例的摩擦布检查装置的操作方法， 包括 如下如下步骤：
步骤 201 , 将摩擦辊缠绕在摩擦辊的外周上， 并将摩擦辊固定在支架上； 步骤 202,通过参数设置面板设置摩擦时摩擦辊与基台表面之间的距离、 摩擦辊的转速、 支架相对于基台的移动速度， 例如， 分别为 0.45mm、 1200RPM, 50mm/s;
步骤 203 , 旋转所述摩擦辊， 使摩擦布摩擦基台的设置有压力感应装置 的基台表面检查装置； 并且使支架垂直于摩擦辊的轴向且平行于基台表面移 动；
步骤 204, 压力感应装置检测到压力感应信号， 将该压力感应信号输出 到信号处理装置；
步骤 205 , 信号处理装置将基台表面各检测点的压力感应信号转换为压 力值， 并根据各检测点压力值的分布情况， 确定摩擦布的缺陷点。
具体地， 所述信号处理装置可以先计算所有检测点的压力值的平均值， 然后， 对于每个检测点， 计算该检测点的压力值与所述平均值的差值， 当所 述差值大于预设的门限时， 可以确定该检测点异常， 并将该异常点的坐标输 出。
在所示示例中， 当所述摩擦辊旋转时使支架垂直于摩擦辊的轴向且平行 于基台表面移动， 使得基台表面上的各检测点的位置与摩擦布上的各点的位 置呈——对应。 由于检测点的位置是与摩擦布上的点的位置是——对应的， 则异常检测点对应的摩擦布上的点即为摩擦布的缺陷点。
应该注意的是， 本公开实施例并不限于当所述摩擦辊旋转时使支架垂直 于摩擦辊的轴向且平行于基台表面移动。 例如， 在不使支架平行于基台表面 移动的情况下， 压力感应装置在同一检测点检测到的压力感应信号在时间轴 上的展开即对应于摩擦布沿摩擦辊的周向的各个点。 这样， 通过分析各检测 点的压力感应信号随时间的变化情况， 能够确定异常检测点所对应的摩擦布 上的缺陷点。
另外， 所述信号处理装置在得到各检测点的压力值后， 还可以直接将所 述压力值输出到显示装置进行显示。 在所述显示装置中， 其显示坐标是与摩 擦布上各点的坐标相对应的， 各点的压力值显示结果可以根据压力值的大小 范围， 显示为不同的灰度， 或者， 显示为不同的颜色， 这样， 显示画面中灰 度异常的点或者颜色异常的点即对应于摩擦布的缺陷点。
本公开实施例中， 通过釆用压感的方式来检查摩擦布表面的缺陷。 由于 压力值异常点是与摩擦布表面缺陷相对应的， 因此， 能够实现对摩擦布表面 缺陷的精确检查。 另外， 由于不需要使用 PI液和 ITO玻璃等检查材料， 因 此， 能够降低检查材料的差异对检查结果的影响， 并能够节省检查成本。
最后应当说明的是，以上实施例仅用以说明本公开的技术方案而非限制， 本领域的普通技术人员应当理解， 可以对本公开的技术方案进行修改或者等 同替换， 而不脱离本公开技术方案的精神范围， 其均应涵盖在本公开的权利 要求范围当中。

Claims

权利要求书
1. 一种摩擦布检查装置， 包括：
基台， 所述基台表面设置有压力感应装置；
支架；
通过所述支架可旋转地支撑在所述基台表面上方的摩擦辊， 摩擦布能够 缠绕于所述摩擦辊的外周，
其中当所述摩擦辊旋转时， 所述摩擦布摩擦所述基台表面， 所述压力感 应装置能够检测到指示摩擦布施加在基台表面的各检测点上的压力的压力感 应信号。
2. 如权利要求 1所述的摩擦布检查装置， 其中， 当所述摩擦辊旋转时， 所述支架能够垂直于所述摩擦辊的轴向且平行于所述基台表面移动， 使得所 述基台表面上的各检测点的位置与摩擦布上的点的位置呈——对应。
3. 如权利要求 1所述的摩擦布检查装置， 其中，
所述摩擦辊能够通过所述支架在垂直于所述基台表面的方向上移动。
4. 如权利要求 1所述的摩擦布检查装置， 其中， 还包括：
信号处理装置， 用于将所述基台表面各检测点的压力感应信号转换为各 检测点的压力值， 并根据各检测点的压力值的分布情况， 确定摩擦布的缺陷 点。
5. 如权利要求 4所述的摩擦布检查装置， 其中， 所述信号处理装置计算 所有检测点的压力值的平均值， 并根据各检测点的压力值与该平均值之间的 差值确定摩擦布的缺陷点。
6. 如权利要求 4所述的摩擦布检查装置， 其中， 所述信号处理装置还用 于将所述各检测点的压力值输出到显示装置进行显示。
7. 如权利要求 1所述的摩擦布检查装置， 其中， 还包括：
信号处理装置， 用于将所述基台表面各检测点的压力感应信号转换为压 力值后， 输出到显示装置进行显示。
8. 如权利要求 1所述的摩擦布检查装置， 其中：
所述压力感应装置为由压电材料组成的传感器网络。
9. 如权利要求 8所述的摩擦布检查装置， 其中： 所述压电材料为磷酸二氢氨。
10. 如权利要求 1所述的摩擦布检查装置， 其中， 还包括：
控制装置， 用于控制所述支架的移动速度、 所述摩擦辊的转动速度以及 所述摩擦辊与所述基台表面之间的距离。
11. 一种摩擦布检查方法， 包括：
将摩擦布缠绕在摩擦辊的外周上；
旋转所述摩擦辊， 使摩擦布摩擦基台的基台表面， 所述基台表面设置有 压力感应装置； 以及
获取所述压力感应装置检测到的、 指示摩擦布施加在基台表面的各检测 点上的压力的的压力感应信号。
12.如权利要求 11所述的摩擦布检查方法，其中，当所述摩擦辊旋转时， 使所述支架垂直于所述摩擦辊的轴向且平行于所述基台表面移动， 使得所述 基台表面上的各检测点的位置与摩擦布上的点的位置呈——对应。
13. 如权利要求 11所述的摩擦布检查方法， 其中， 还包括：
将所述基台表面各检测点的压力感应信号转换为压力值， 并根据各检测 点压力值的分布情况， 确定摩擦布的缺陷点。
14. 如权利要求 13所述的摩擦布检查方法， 其中， 还包括：
将所述基台表面各检测点的压力感应信号转换为压力值后， 输出到显示 装置进行显示。
15. 如权利要求 11所述的摩擦布检查方法， 其中， 还包括：
在开始旋转所述摩擦辊之前， 调节所述摩擦辊与所述基台表面之间的距 离。
PCT/CN2012/083238 2011-11-15 2012-10-19 摩擦布检查装置及摩擦布检查方法 WO2013071808A1 (zh)

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