WO2014044032A1 - 一种薄片类介质厚度检测装置 - Google Patents

一种薄片类介质厚度检测装置 Download PDF

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Publication number
WO2014044032A1
WO2014044032A1 PCT/CN2013/072995 CN2013072995W WO2014044032A1 WO 2014044032 A1 WO2014044032 A1 WO 2014044032A1 CN 2013072995 W CN2013072995 W CN 2013072995W WO 2014044032 A1 WO2014044032 A1 WO 2014044032A1
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WO
WIPO (PCT)
Prior art keywords
detection
roller
detecting
shaft
magnet
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Application number
PCT/CN2013/072995
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English (en)
French (fr)
Inventor
常洋
李喆
谭栋
Original Assignee
广州广电运通金融电子股份有限公司
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Publication of WO2014044032A1 publication Critical patent/WO2014044032A1/zh

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
    • G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
    • G01B5/068—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness of objects while moving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
    • B65H7/12—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/13—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/20—Sensing or detecting means using electric elements
    • B65H2553/22—Magnetic detectors, e.g. Hall detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/60—Details of intermediate means between the sensing means and the element to be sensed
    • B65H2553/61—Mechanical means, e.g. contact arms
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
    • G01B2210/40—Caliper-like sensors
    • G01B2210/42—Caliper-like sensors with one or more detectors on a single side of the object to be measured and with a backing surface of support or reference on the other side

Definitions

  • the invention relates to a priority of a Chinese patent application filed on September 21, 2012, the Chinese Patent Application No. 201210356761.1, the invention entitled "a sheet-like medium thickness detecting device", The entire contents of this application are incorporated herein by reference.
  • the present invention relates to a device for metering thickness, and more particularly to a detecting device for detecting the thickness of a sheet-like document in a financial self-service device.
  • the value document carries out identification methods such as image recognition, thickness detection, and magnetic information detection to ensure the authenticity of the processed value documents of the sheet.
  • the thickness detection is indispensable in the whole inspection.
  • the thickness detection information can be used to judge the authenticity of the processed value documents of the sheet, and it can also be judged whether the mechanically separated sheet-like value document is a sheet, that is, whether it is a heavy bill to ensure the accuracy of counting.
  • the Hall sensor is used as a detection unit because of its high sensitivity.
  • the Hall sensor is currently used.
  • a thickness detecting device as a detecting unit, comprising a fixing frame 7 in which the reference axis 1 and the detecting shaft 3 are opposed to each other in parallel, and the reference shaft 1 is fixedly provided with a reference roller 2 on the detecting shaft 3
  • a detecting roller base 4 is provided which is rotatably rotated around the detecting shaft 3 at one end, and a detecting roller 6 is disposed on the free end of each detecting roller base 4, so that the detecting roller 6 on the free end is always directed to the reference roller 2
  • a torsion spring 5 is disposed between the detecting roller base 4 and the fixing frame 7, and the two ends of the torsion spring 5 are respectively overlapped on the detecting roller base 4 and the fixing frame 7 to detect the freedom of the roller base 4.
  • the end provides a pressing force in the direction of the reference roller 2, and a magnet is disposed on a side of each of the detecting roller bases 4 facing away from the detecting roller 6, and a Hall sensor 9 is disposed on the fixing frame 7 corresponding to each of the magnets 8.
  • the detecting roller 6 is lifted together with the detecting roller base 4, and the Hall sensor 9 passes the detected
  • the displacement of the magnet 8 from the upward movement is determined from the change in the magnetic flux of the magnet 8, thereby determining the thickness of the sheet-like value document.
  • the detecting roller 6 together with the detecting roller base 4 is quickly reset by the torsion spring 5.
  • the Hall sensor determines the change in displacement between the magnet and the Hall sensor by sensing the change in the magnetic flux of the magnet.
  • the magnet is initially in a relative position to the inductor. In theory, the magnet moves up and down, which best reflects the value of the thickness of the sheet-like document.
  • the interval in which the detecting roller base 4 is shaken left and right is +/-T, and the magnetic flux change value thereof is -A C2; the distance between the Hall sensor 9 and the magnet 8 is L1, in the detecting roller base 4
  • the distance between the Hall sensor 9 and the magnet 8 is L2
  • the corresponding magnetic flux has a change value.
  • An object of the present invention is to provide a sheet-like medium thickness detecting device which can effectively eliminate detection misalignment caused by displacement of a detecting roller base in the axial direction of a detecting shaft.
  • the sheet medium thickness detecting device comprises:
  • a mounting bracket for mounting and carrying the following components; a reference shaft, the two ends of which are mounted on the fixing frame by bearings, and the reference shaft is fixedly sleeved with a reference roller;
  • the detecting shaft is provided with at least one detecting roller base which is freely rotatable around the detecting shaft, and the free end of the detecting roller base is provided with free rotation a detecting roller, the detecting roller is in elastic contact with the reference roller;
  • an elastic pressing piece is disposed corresponding to the detecting roller base, the elastic pressing piece is fixed at one end to the fixing frame, and the other end forms a free end and applies pressure to the detecting roller base toward the reference roller.
  • a pressing force; a magnet is fixedly disposed on a side of the elastic pressing piece facing away from the detecting roller; and a displacement fixed to the fixing frame opposite to the magnet for detecting the displacement amount of the magnet in a non-contact manner Hall sensor.
  • the detecting roller bases are two or more, and are evenly spaced on the detecting shaft.
  • the number of detecting roller bases is twelve.
  • a torsion spring is disposed between the detecting roller base and the fixing frame, and two ends of the torsion spring are respectively overlapped on the detecting roller base and the fixing frame to provide a free end direction of the detecting roller base The rotational torque in the direction of the reference roller.
  • the sheet-like medium thickness detecting device has the following advantages compared with the prior art:
  • the detection setting is through a non-fixed design of the magnet and the detecting roller base, that is, the elastic pressing piece carries the magnet, and the elastic pressing piece and the Hall
  • the sensors are fixed together on the mounting bracket to ensure absolute opposition between the magnet and the Hall sensor, so as to effectively offset the offset between the magnet and the Hall sensor due to the displacement oscillation of the detecting roller base on the detecting shaft.
  • the detection error caused by the oscillation ensures the accuracy of the detection device for the thickness detection of the sheet medium.
  • FIG. 1 is a schematic structural view of a conventional sheet-like medium thickness detecting device
  • FIG. 2 is a schematic side view of a conventional sheet-like medium thickness detecting device
  • FIG. 3 is a schematic structural view of a sheet-like medium thickness detecting device provided by the present invention
  • 4 is a schematic view showing the working principle of the sheet-like medium thickness detecting device provided by the present invention
  • FIG. 5 is a side view showing the sheet-like medium thickness detecting device provided by the present invention.
  • a preferred sheet-like medium thickness detecting apparatus comprises: a fixing frame 17 for mounting and carrying the following components; a reference shaft 11 whose both ends pass through the bearing 21 Mounted on the fixing frame 17, the reference shaft 11 is fixedly sleeved with a reference roller 12; a detecting shaft 13 is fixedly mounted on the fixing frame 17, and the detecting shaft 13 is evenly arranged at intervals (12 in the present embodiment) a detecting roller base 14 which is freely rotatable around the detecting shaft at one end, and a freely rotating detecting roller 16 is disposed on the free end of the detecting roller base 14, the detecting roller 16 and the reference roller 12 forms an elastic contact arrangement.
  • an elastic pressing piece 15 is disposed.
  • the elastic pressing piece 15 is end-fixed on the fixing frame 17, and the other end forms a free end and faces the detecting roller base toward the detecting roller base. 14 applying a pressing force; a magnet 18 is fixedly disposed on a side of the elastic pressing piece 15 facing away from the detecting roller 12; and a non-contacting manner is fixed to the fixing frame 17 opposite to the magnet 18
  • a Hall sensor 19 for detecting the displacement amount of the magnet 18, the Hall sensor 19 being electrically coupled to a data processing unit (not shown) through a wire for collecting the Hall sensor 19 The information is processed.
  • FIG. 4 a schematic diagram of the working principle of the sheet-like medium thickness detecting device provided by the present invention is provided, and a side of the detecting roller base 14 facing the reference roller 12 is provided with a circular arc-shaped groove for accommodating the detecting roller 16, and the circle There are two arcuate grooves, and a partition is disposed between the two arcuate grooves, and the partition plate is fixedly disposed with the rotating shaft of the detecting roller 16. A side opposite to the arc-shaped groove of the free end of the detecting roller base 14 is elastically resisted by the free end of the elastic pressing piece 15, and the self of the detecting roller base 14 is pressed.
  • the tightness between the detecting roller 16 and the reference roller 12 is maintained by the end, and the magnet 18 is fixedly fixed to the side opposite to the detecting roller base 14 at the free end of the elastic pressing piece 15, and the fixing frame 17 corresponding to the magnet 18 is fixed.
  • the Hall sensor 19 is provided, so that when the sheet-like medium 20 passes between the reference roller 12 and the detecting roller 16, the detecting roller base 14 is rotated about the detecting shaft 13, and the free end of the elastic pressing piece 15 is lifted upward. Displacement, thereby causing a change in the distance between the magnet 18 and the Hall sensor 19, such that the magnetic flux passing through the Hall sensor 19 changes, and the change in the magnetic flux is calculated by the data processing unit to obtain a sheet-like medium.
  • the thickness value of 20 is provided, so that when the sheet-like medium 20 passes between the reference roller 12 and the detecting roller 16, the detecting roller base 14 is rotated about the detecting shaft 13, and the free end of the elastic pressing piece 15 is lifted upward. Displacement, thereby causing a change in the
  • a side view of the sheet-like medium thickness detecting device provided by the present invention, in order to ensure that the free end of the detecting roller base 14 can be reliably pressed tightly to the reference roller 12, in the detecting roller base 14 and the fixing frame A torsion spring 141 is disposed between the two ends of the torsion spring 141.
  • the two ends of the torsion spring 141 are respectively attached to the detecting roller base 14 and the fixing frame 17 to provide a pressing force to the reference roller 12 in the direction of the free end of the detecting roller base 14.
  • the operation principle of the sheet-like medium thickness detecting device will be described with reference to Figs. 3 to 5.
  • the free end of the detecting roller base 14 is biased toward the side of the reference roller 12 by the elastic pressing piece 15 (in the case of the torsion spring 141, the elastic force of the torsion spring 141 is applied).
  • the detecting roller 16 is brought into close contact with the reference roller 12.
  • each detecting roller base 14 is correspondingly provided with an elastic pressing piece 15, which is elastic.
  • the pressing piece 15 is fixed to the fixing frame 17 at the other end, and the other end forms a free end and applies a pressing force to the detecting roller base 14 in the direction of the reference roller 12; the free end of the elastic pressing piece 15 faces away from the detecting roller 12
  • a magnet 18 is fixedly disposed on one side thereof; and a Hall sensor 19 fixed to the fixing frame 17 opposite to the magnet 18 for detecting the displacement amount of the magnet 18 in a non-contact manner. Therefore, those skilled in the art can enter the number of detecting roller bases 14 as needed. The line is increased or decreased. When it is only necessary to detect the thickness of a specific position, it is only necessary to provide a detecting roller base 14 and corresponding elastic pressing piece 15, magnet 18 and Hall sensor 19 at the specific position.
  • the thickness detecting arrangement is provided by the non-fixed design of the magnet 18 and the detecting roller base 14, that is, the magnet 18 is carried by an elastic pressing piece 15, and the elastic pressing piece 15 is fixed to the fixing frame 17 together with the Hall sensor 19, thereby
  • the absolute opposition between the magnet 18 and the Hall sensor 19 is ensured to effectively solve the bias oscillating between the magnet 18 and the Hall sensor 19 due to the displacement oscillation of the detecting roller base 14 on the detecting shaft 13.
  • the detection error problem ensures the accuracy of the detection device for detecting the thickness of the sheet-like medium 20.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

一种用于计量厚度的装置，特别是一种用于检测薄片类介质厚度的检测装置，其包括：固定架（17）；基准轴（11），其两端通过轴承（21）安装于该固定架（17）上，该基准轴（11）上固定套接有基准辊（12）；检测轴（13），其两端固定安装于该固定架（17）上，该检测轴（13）上设置有至少一个一端绕该检测轴（13）自由旋转的检测辊基座（14），该检测辊基座（14）的自由端上设置有自由转动的检测辊（16），该检测辊（16）与该基准辊（12）形成弹性接触设置；与检测辊基座（14）对应地设有弹性压片（15），该弹性压片（15）一端固定于固定架（17）上，另一端形成一自由端并向该基准辊（12）方向对该检测辊基座（14）施加压紧力；该弹性压片（15）的自由端背向检测辊（16）的一侧固定设有一磁铁（18）；以及与该磁铁（18）对置的固定在该固定架（17）上的用于以非接触方式检测所述磁铁（18）的位移量的霍尔感应器（19）。

Description

一种薄片类介盾厚度检测装置 本申请要求于 2012 年 09 月 21 日提交中国专利局、 申请号为 201210356761.1、 发明名称为"一种薄片类介质厚度检测装置"的中国专利 申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及一种用于计量厚度的装置， 特别是一种用于金融自助设备 中检测薄片类有价文件厚度的检测装置。 背景技术
在金融自助设备中为了对批量处理的每一张薄片类有价文件 （比如纸 币）逐一进行检验， 需要将堆叠的薄片类有价文件一张张分离开来， 然后 对分离的单张薄片类有价文件进行图像识别、 厚度检测、 磁信息检测等识 别手段， 以保证所处理的薄片类有价文件的真实性， 其中， 厚度检测在整 个检测中是必不可少的。 厚度检测信息即可以用来判断所处理的薄片类有 价文件的真伪， 还可以判断机械分离薄片类有价文件是否是一张， 即是否 是重钞， 以保证计数的准确性。
目前针对薄片类有价文件的厚度检测有众多的方法， 其中， 采用霍尔 感应器作为检测单元由于其灵敏度高而被广泛使用， 如图 1和图 2所示即 为目前采用霍尔感应器作为检测单元的厚度检测装置， 其包括一固定架 7, 在所述固定架 7内平行地对置的基准轴 1和检测轴 3, 基准轴 1上固定 设置有基准辊 2, 检测轴 3上设置有多个一端绕该检测轴 3 自由旋转的检 测辊基座 4, 每一检测辊基座 4的自由端上设置有一检测辊 6, 为了使该自 由端上的检测辊 6始终向基准辊 2靠近， 在检测辊基座 4和固定架 7之间 设置一扭簧 5 , 该扭簧 5的两端分别搭接在检测辊基座 4和固定架 7上为 检测辊基座 4的自由端向基准辊 2方向提供压紧力， 每一检测辊基座 4背 离检测辊 6的一侧设置有一磁铁 在固定架 7上对应于所述的每一磁铁 8 设置有一霍尔感应器 9。 当薄片类有价文件从基准辊 2和检测辊 6之间经 过时， 检测辊 6连同检测辊基座 4被抬起， 霍尔传感器 9通过检测到的来 自磁铁 8的磁通量的变化来判定磁铁 8向上浮动的位移， 从而判定薄片类 有价文件的厚度。 当薄片类有价文件完全通过后， 检测辊 6连同检测辊基 座 4在扭簧 5作用下迅速复位。
霍尔感应器是通过感应磁铁磁通量的变化情况， 来判断磁铁与霍尔感 应器之间的位移变化。 磁铁最初与感应器处在一个相对位置， 理论上， 磁 铁上下移动， 最能够真实反映薄片类有价文件厚度的值。 但是由于加工工 艺问题及使用过程中转轴的磨损等情况， 使得检测辊基座 4与检测轴 2之 间会存在缝隙， 从而引起检测辊基座 4左右摇摆； 尽管检测辊基座 4与检 测轴 2通过卡簧限位， 仍然会引起检测辊基座 4在检测轴 2的轴向上移位 震荡。 由于霍尔感应器具有很高的敏感性， 很小的磁通量变化都可以被检 测到。 比如， 假设检测辊基座 4左右晃动的区间是 +/-T, 其引起的磁通量 变化值为 -A C2; 霍尔感应器 9与磁铁 8之间的距离是 L1, 在检测辊基座 4不发生左右摇摆的情况下， 当薄片类有价文件经过基准辊 2和检测辊 6 之间时， 霍尔感应器 9与磁铁 8之间的距离是 L2, 此时对应的磁通量的变 化值为 Δ Cl。 当薄片类有价文件经过检测辊 6与基准辊 2之间时， 检测辊 6被抬起并随检测辊基座 4一起左右偏移， 偏移量是 T, 此时对应的磁通 量变化值为 Δ C3=A C1+ (-Δ d2) =Δ Cl-Δ C2。 那么当 Δ C3=0 时， 霍尔感应器 9无法感应到薄片类有价文件厚度的值； 当 Δ (Τ3>0时， 霍尔 感应器 9检测到的薄片类有价文件的厚度小于正常薄片类有价文件的厚度 值； 当 Δ C3<0时， 感应器会汇报检测到通过的薄片类有价文件为负值。
显然， 由于检测辊基座 4在检测轴 2的轴向上移位震荡， 使得厚度检 测装置不能正确地反应通过的薄片类有价文件的厚度值， 从而导致检测装 置的不正确性， 因此， 针对上述技术缺陷寻求一种解决方案是必要的。 发明内容
本发明的目的在于提供一种可以有效消除检测辊基座在检测轴的轴向 上移位震荡而引起的检测不准的薄片类介质厚度检测装置。
这种薄片类介质厚度检测装置， 其包括：
一固定架， 用于安装和承载如下零部件； 一基准轴， 其两端通过轴承安装于该固定架上， 该基准轴上固定套接 有基准辊；
一检测轴， 其两端固定安装于该固定架上， 该检测轴上设置有至少一 个一端绕该检测轴自由旋转的检测辊基座， 该检测辊基座的自由端上设置 有自由转动的检测辊， 该检测辊与该基准辊形成弹性接触设置；
其特殊之处在于， 与检测辊基座对应地设有弹性压片， 该弹性压片一 端固定于固定架上， 另一端形成一自由端并向该基准辊方向对该检测辊基 座施加压紧力； 该弹性压片的自由端背向检测辊的一侧固定设有一磁铁； 以及与该磁铁对置的固定在该固定架上的用于以非接触方式检测所述磁铁 的位移量的霍尔感应器。
优选的， 所述检测辊基座自由端上设置的自由转动的检测辊为两个。 进一步的， 所述检测辊基座为两个以上， 且间隔均匀地设置在检测轴 上。
进一步的， 所述检测辊基座为 12个。
优选的， 所述检测辊基座和固定架之间设置一扭簧， 该扭簧的两端分 别搭接在检测辊基座和固定架上， 以提供所述检测辊基座的自由端向基准 辊方向的转动扭力。
该薄片类介质厚度检测装置与现有技术对比分析具有如下优点： 本检测设置通过对磁铁与检测辊基座的非固定设计， 即， 通过一弹性 压片承载磁铁， 而弹性压片与霍尔传感器共同固定在固定架上， 从而保证 了磁铁与霍尔传感器之间的绝对对置， 以有效解决由于检测辊基座在检测 轴上的位移震荡而导致磁铁与霍尔传感器之间的偏置震荡而引起的检测错 误问题， 从而保证了检测装置对薄片类介质厚度检测的准确性。
附图说明
图 1是现有薄片类介质厚度检测装置的结构示意图；
图 2是现有薄片类介质厚度检测装置的侧向示意图；
图 3是本发明所提供的薄片类介质厚度检测装置结构示意图； 图 4是本发明所提供的薄片类介质厚度检测装置工作原理示意图； 图 5是本发明所提供的薄片类介质厚度检测装置的侧向示意图。 具体实施方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进 行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没 有作出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的 范围。
为进一步阐述本发明所提供的这种薄片类介质厚度检测装置， 以下结 合本发明的一个优选实施例的图示做进一步的详细介绍。
参阅图 3所述，本发明所提供的一种优选的薄片类介质厚度检测装置， 其包括： 一用于安装和承载如下零部件的固定架 17; —基准轴 11 , 其两端 通过轴承 21安装于该固定架 17上， 该基准轴 11上固定套接有基准辊 12; 一检测轴 13, 其两端固定安装于该固定架 17上， 该检测轴 13上间隔均匀 地设置有多个（本实施例中为 12个）一端绕该检测轴自由旋转的检测辊基 座 14, 该检测辊基座 14的自由端上设置有自由转动的检测辊 16, 该检测 辊 16与该基准辊 12形成弹性接触设置。其中， 与检测辊基座 14对应地设 有弹性压片 15, 该弹性压片 15—端固定于固定架 17上， 另一端形成一自 由端并向该基准辊 12方向对该检测辊基座 14施加压紧力； 该弹性压片 15 的自由端背向检测辊 12的一侧固定设有一磁铁 18; 以及与该磁铁 18对置 的固定在该固定架 17上的用于以非接触方式检测所述磁铁 18的位移量的 霍尔感应器 19, 该霍尔感应器 19通过导线与数据处理单元（图中未示出 ) 电联接， 该数据处理单元用于对霍尔感应器 19采集的信息进行处理。
参阅附图 4, 本发明所提供的薄片类介质厚度检测装置工作原理示意 图，该检测辊基座 14自由端面向基准辊 12的一侧设有容纳检测辊 16的圓 弧形凹槽， 该圓弧形凹槽为两个， 且两个圓弧形凹槽之间设有一隔板， 该 隔板固定设置检测辊 16的转动轴。 检测辊基座 14的自由端与圓弧形凹槽 相背的一侧面被弹性压片 15的自由端弹性抵触， 按压检测辊基座 14的自 由端而维持检测辊 16与基准辊 12之间的紧密性，而弹性压片 15 自由端与 检测辊基座 14相背的一侧固定设有磁铁 18,与磁铁 18所对应的固定架 17 上设有霍尔感应器 19, 因此， 当薄片类介质 20通过基准辊 12与检测辊 16 之间时检测辊基座 14绕检测轴 13转动，而使弹性压片 15的自由端向上方 抬起而移位， 因此造成磁铁 18与霍尔感应器 19之间的距离发生变化， 使 得通过霍尔感应器 19的磁通量发生变化，通过数据处理单元对磁通量的变 化进行计算处理得出薄片类介质 20的厚度值。
参阅图 5, 本发明所提供的薄片类介质厚度检测装置的侧向示意图， 为了保证检测辊基座 14的自由端可以可靠地向基准辊 12弹性压紧， 在检 测辊基座 14和固定架 17之间设置一扭簧 141 , 该扭簧 141的两端分别搭 接在检测辊基座 14和固定架 17上为检测辊基座 14的自由端向基准辊 12 方向提供压紧力。
下面结合图 3至图 5所示， 对该薄片类介质厚度检测装置的工作原理 进行说明。薄片类介质厚度检测装置处于待机状态时，检测辊基座 14的自 由端受到弹性压片 15 (有扭簧 141的情况下， 加上扭簧 141的弹力 )向基 准辊 12—侧弹压力， 使检测辊 16与基准辊 12紧密接触。 当薄片类介质 20进入检测辊 16和基准辊 12之间时， 由于固定基准辊 12的基准轴 12被 固定， 而设置在可自由转动的检测辊基座上的检测辊 16被向上抬起，使得 磁铁 18与霍尔感应器 19之间的距离发生变化，霍尔感应器 19检测到的磁 通量的变化值通过数据处理单元的数据处理和计算获得通过薄片类介质的 实际厚度值。
本实施例， 为了对薄片介质的全幅面进行厚度检测而设计为， 在检测 轴 13上均匀分布 12个检测辊基座 14, 每个检测辊基座 14对应设置了弹 性压片 15, 该弹性压片 15—端固定于固定架 17上， 另一端形成一自由端 并向该基准辊 12方向对该检测辊基座 14施加压紧力；该弹性压片 15的自 由端背向检测辊 12的一侧固定设有一磁铁 18; 以及与该磁铁 18对置的固 定在该固定架 17上的用于以非接触方式检测所述磁铁 18的位移量的霍尔 感应器 19。 因此本领域技术人员可以根据需要对检测辊基座 14的数量进 行增加或减少， 当只需检测特定位置的厚度时， 那么只需在该特定位置设 置一个检测辊基座 14以及对应的弹性压片 15、 磁铁 18和霍尔感应器 19 即可。
上述厚度检测设置通过对磁铁 18与检测辊基座 14的非固定设计，即， 通过一弹性压片 15承载磁铁 18, 而弹性压片 15与霍尔传感器 19共同固 定在固定架 17上， 从而保证了磁铁 18与霍尔传感器 19之间的绝对对置， 以有效解决由于检测辊基座 14在检测轴 13上的位移震荡而导致磁铁 18 与霍尔传感器 19之间的偏置震荡而引起的检测错误问题，从而保证了检测 装置对薄片类介质 20厚度检测的准确性。
以上所述是本发明的优选实施方式， 应当指出， 对于本技术领域的普 通技术人员来说， 在不脱离本发明原理的前提下， 还可以做出若干改进和 润饰， 这些改进和润饰也视为本发明的保护范围。

Claims

权 利 要 求
1、 一种薄片类介质厚度检测装置， 其包括：
一固定架， 用于安装和承载如下零部件；
一基准轴， 其两端通过轴承安装于所述固定架上， 所述基准轴上固定 套接有基准辊；
一检测轴， 其两端固定安装于所述固定架上， 所述检测轴上设置有至 少一个一端绕该检测轴自由旋转的检测辊基座， 所述检测辊基座的自由端 上设置有自由转动的检测辊，所述检测辊与所述基准辊形成弹性接触设置； 其特征在于， 与所述检测辊基座对应地设有弹性压片， 所述弹性压片 一端固定于所述固定架上， 另一端形成一自由端并向所述基准辊方向对所 述检测辊基座施加压紧力； 所述弹性压片的自由端背向所述检测辊的一侧 固定设有一磁铁； 以及与所述磁铁对置的固定在所述固定架上的用于以非 接触方式检测所述磁铁的位移量的霍尔感应器。
2、 如权利要求 1所述的薄片类介质厚度检测装置， 其特征在于， 所述 检测辊基座自由端上设置的自由转动的检测辊为两个。
3、 如权利要求 1或 2所述的薄片类介质厚度检测装置， 其特征在于， 所述检测辊基座为两个以上， 且间隔均匀地设置在所述检测轴上。
4、 如权利要求 3所述的薄片类介质厚度检测装置， 其特征在于， 所述 检测辊基座为 12个。
5、 如权利要求 1所述的薄片类介质厚度检测装置， 其特征在于， 所述 检测辊基座和所述固定架之间设置一扭簧， 所述扭簧的两端分别搭接在所 述检测辊基座和所述固定架上， 以提供所述检测辊基座的自由端向基准辊 方向的转动扭力。
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