WO2012071850A1 - 一种弯折件的弯折角度测量设备及方法 - Google Patents

一种弯折件的弯折角度测量设备及方法 Download PDF

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Publication number
WO2012071850A1
WO2012071850A1 PCT/CN2011/073765 CN2011073765W WO2012071850A1 WO 2012071850 A1 WO2012071850 A1 WO 2012071850A1 CN 2011073765 W CN2011073765 W CN 2011073765W WO 2012071850 A1 WO2012071850 A1 WO 2012071850A1
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WIPO (PCT)
Prior art keywords
bending
distance
angle
measuring device
rotating platform
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2011/073765
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English (en)
French (fr)
Inventor
涂宏斌
任会礼
曾光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Zoomlion Special Vehicle Co Ltd
Changsha Zoomlion Heavy Industry Science and Technology Development Co Ltd
Original Assignee
Hunan Zoomlion Special Vehicle Co Ltd
Changsha Zoomlion Heavy Industry Science and Technology Development Co Ltd
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Application filed by Hunan Zoomlion Special Vehicle Co Ltd, Changsha Zoomlion Heavy Industry Science and Technology Development Co Ltd filed Critical Hunan Zoomlion Special Vehicle Co Ltd
Publication of WO2012071850A1 publication Critical patent/WO2012071850A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/26Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/006Bending sheet metal along straight lines, e.g. to form simple curves combined with measuring of bends
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means

Definitions

  • the present invention relates to the field of angle measurement, and more particularly to a measuring apparatus and method for detecting a bending angle of a bent workpiece. Background technique
  • the busbar bending machine is a device for machining the busbar
  • Figure 1 shows the application of the angle indicating device in the busbar bending machine.
  • the busbar bending machine includes a die 10 and a ram 20.
  • the bus bar bender is used to change the bending angle of the bus bar 30
  • the bus bar 30 is placed in the die 10, and the bus bar 30 is punched by the indenter 20, thereby changing the bending angle of the bus bar 30.
  • the control of the bending angle is achieved by an angle indicating device.
  • the angle indicating device includes a jack 40, a pointer 50, and a dial 60.
  • the jack 40 is located in the die 10, is connected to the pointer 50, and moves downward as the busbar 30 is pressed.
  • the pointer 50 is moved to indicate the angle displayed on the dial 60.
  • the mounting position of the angle indicating device is determined based on the correspondence between the displacement of the upper and lower ejector pins 40 and the bending angle of the bus bar.
  • the above angle indicating device can measure the bending angle, the mounting error has a great influence on the measurement result, and the angle indicating device is greatly depleted due to frequent impact.
  • Laser self-alignment method The resolution of the measurement is related to the focal length of the lens in the collimator. The longer the focal length, the higher the resolution, but the lens focal length is too long, which will increase the space occupied by the instrument.
  • the measuring range of measuring instruments based on optical self-alignment is generally small, usually between a few minutes and several tens of minutes, and the resolution of the measurement is not ideal.
  • the present invention provides a bending angle measuring device and method which are simple in mechanism, wide in application range and accurate in measurement results.
  • the bending angle measuring device comprises: a rotating platform; a driving device: the bending member includes a first bending portion and a second bending portion respectively located at two sides of the bending point of the bending member a device, mechanically coupled to the rotating platform for driving the rotating platform; an angle measuring device for measuring a rotation angle of the rotating platform; and a distance measuring device fixed to the rotating platform for measuring the a distance from the measuring device to the bending member; and a control device electrically connected to the angle measuring device, the distance measuring device and the driving device for determining between the first bending portion of the distance measuring device and the bending member a distance that controls the driving device to drive the rotating platform to rotate in a bending direction of the first bending portion of the bending member until the first bending to the bending member measured by the distance measuring device
  • the distance of the folded portion is the smallest, and the angle of rotation sensed by the angle measuring device is used as the bending angle of the first bent portion of the bent piece, and at least according to the The bending angle is
  • the bending angle of the bending member may be twice the bending angle of the first bending portion of the bending member.
  • the apparatus may further comprise another set of rotating platforms, driving means, angle measuring means and distance measuring means provided for the second bent portion of the bending piece, the control means also calculating the bending part a bending angle of the second bent portion, and the bending angle and the number of the bent piece The bending angles of a bent portion are added to obtain a bending angle of the bent piece.
  • the distance measuring device can be a distance measuring sensor, and the distance measuring sensor can be an ultrasonic distance measuring sensor, a laser ranging sensor or an infrared distance measuring sensor.
  • the angle measuring device may be an angle sensor, which may be a tilt sensor fixed to the rotating platform.
  • the driving device can be a stepping motor.
  • the mechanical connection between the driving device and the rotating platform may be a worm gear connection or a gear connection.
  • the method for measuring the bending angle of the bending member includes: adjusting the rotating platform to be fixed on the rotating platform before the bending member is bent The distance measuring device is perpendicular to the first bending portion of the bending member; after the bending member is bent, the rotating platform is rotated in a bending direction of the first bending portion of the bending member And measuring a distance to the bending member measured by the distance measuring device; and measuring a rotation angle of the rotating platform, the bending angle being used as a bending of the first bending portion of the bending member An angle, and at least the bending angle of the bent piece is calculated according to the bending angle.
  • the bending angle of the bending member may be twice the bending angle of the first bending portion of the bending member.
  • the method may further include: measuring a bending angle of the second bending portion of the bending member; and adding the bending angle to a bending angle of the first bending portion of the bending member To obtain the bending angle of the bent piece.
  • the minimizing the distance to the first bending portion measured by the distance measuring device comprises the following steps: after the bending member is bent, recording the measured position of the distance measuring device Determining an initial distance of the first bent portion, and rotating the rotating platform in a bending direction of the first bending portion in a first step length, and the distance measuring device is rotated for each first step
  • the measured current distance to the first bent portion is compared with the previous distance measured by the distance measuring device to the first bent portion at the previous position, if the current distance is smaller than the previous distance And continuing to rotate the rotating platform in a bending direction of the first bending portion in a first step length; if the current distance is greater than the previous distance, controlling the rotating platform to retreat to a previous position, And staying at the position; if the current distance is equal to the previous distance, then controlling the rotating platform to remain at the current position.
  • the minimizing the distance to the first bending portion measured by the distance measuring device comprises the following steps: after the bending member is bent, recording the measured position of the distance measuring device Determining an initial distance of the bending member, and rotating the rotating platform in a second step by a step in a bending direction of the first bending portion, and measuring the second step by each distance measuring device
  • the current distance to the first bent portion is compared with the previous distance measured by the distance measuring device to the first bent portion at the previous position, and if the current distance is smaller than the previous distance, And continuing to rotate the rotating platform in a bending direction of the first bending portion in a second step; if the current distance is greater than or equal to the previous distance, controlling bending at the first bending portion Rotating the rotating platform in a direction opposite to the third step of the second step, the third step of each rotation, the measured by the distance measuring device to the bent piece current Comparing the previous distance to the first bent portion measured by the distance measuring device at the time of the previous position, and continuing the bend at the first bent portion
  • the bending angle measuring device and method provided by the invention can find the distance of the distance measuring device to the bending member and rotate the rotating platform to minimize the distance, and measure the rotation angle of the rotating platform by using the angle measuring device, thereby
  • the indirect measurement of the bending angle of the first bending portion of the bending member is realized by the rotation angle, and then the bending angle of the entire bending portion is obtained by using the bending angle of the first bending portion of the bending member.
  • the invention has the advantages of simple structure, accurate measurement and low requirements on the external environment.
  • Figure 1 shows the application of the angle indicating device in a busbar bending machine
  • FIG. 2 is a schematic structural view of a bending angle measuring device provided by the present invention.
  • FIG. 3 is a schematic view showing a specific use of the bending angle measuring device provided by the present invention
  • FIG. 4 is a flow chart showing a rotating process of the rotating platform in the bending angle measuring device provided by the present invention
  • Figure 5 is a flow chart showing another rotation process of the rotating platform in the bending angle measuring device provided by the present invention.
  • FIG. 6 is a flow chart of a method for measuring a bending angle provided by the present invention. detailed description
  • FIG. 2 is a schematic structural view of a bending angle measuring device provided by the present invention
  • FIG. 3 is a schematic view showing a specific use of the bending angle measuring device provided by the present invention.
  • the present invention provides a bending angle measuring device for a bending member 30, the bending member 30 including a first bending portion 30a respectively located at two sides of a bending point of the bending member and a second bending portion 30b, the apparatus comprising a rotating platform 100, an angle measuring device 200, a distance measuring device 300, a driving device 400 and a control device 500, the driving device 400 being mechanically coupled with the rotating platform 100 for driving the rotation
  • the platform 100 is rotated in a bending direction of the first bending portion 30a of the bending member 30;
  • the angle measuring device 200 is configured to measure a rotation angle of the rotating platform 100;
  • the distance measuring device 300 is fixed to the On the rotating platform 100, for measuring the distance of the distance measuring device 300 to the first bending portion 30a of the bending member 30;
  • the control device 500 can be another embedded system such as a single chip microcomputer or a DSP, and can include a display screen to display the bending angle of the bending member 30.
  • the distance measuring device 300 may be a ranging sensor, and the ranging sensor may be an ultrasonic ranging sensor, a laser ranging sensor, or an infrared ranging sensor.
  • the angle measuring device 200 may be an angle sensor, which may be a tilt sensor (such as a solid pendulum tilt sensor, a liquid pendulum tilt sensor or a gas pendulum tilt sensor) fixed on the rotating platform 100.
  • the tilt sensor is rotatable with the rotating platform 100, so that the tilt angle sensed by the tilting platform 100 is used as the rotation angle of the rotating platform 100;
  • the angle measuring device 200 can also be realized by two ranging sensors disposed under the rotating platform 100,
  • the distance measuring sensor can respectively measure the distance to the rotating platform 100, and then obtain the rotation angle of the rotating platform 100 by using a trigonometric function relationship according to the difference between the measured distance and the distance between the two ranging sensors.
  • the drive device 400 can be a stepper motor.
  • the present invention is not limited thereto, and any means for realizing ranging, angle measurement, and driving the rotation of the rotary table 100 can be applied thereto.
  • the mechanical connection between the driving device 400 and the rotating platform 100 can be various connection methods known in the art, preferably a worm gear connection or a gear connection, which can drive the driving device 400 to the rotating platform 100. Smooth and high precision.
  • FIG. 3 is a schematic view showing a specific use of the bending angle measuring device provided by the present invention.
  • the distance measuring device 300 and the angle measuring device 200 (herein, the angle measuring device 200 is taken as an example) are fixed on the rotating platform 100, and the rotating platform 100 is shown.
  • the rotation is driven by the driving device 400 to form a closed loop control system.
  • the distance measuring device 300 perpendicularly facing the bending member 30 measures the first bending portion 30a from the bending member 30.
  • the distance is the initial minimum distance from the first bent portion 30a of the bend 30, which is the basis for the zero adjustment of the angle measuring device 200.
  • the distance measured by the distance measuring device 300 (the distance is the distance from the distance measuring device 300 to the first bending portion 30a) changes, and the control device 500 Taking the distance measured by the distance measuring device 300 as feedback, the driving device 400 is activated to drive the rotating platform 100 to rotate, thereby driving the angle measuring device 200 and the distance measuring device 300 to rotate until the distance measuring device 300 measures the bending member 30.
  • the driving device 400 stops working. At this time, the angle measured by the tilt sensor 200 is the bending angle of the first bent portion 30a of the bent member 30.
  • the bending angles of the first bending portion 30a and the second bending portion 30b of the bending member 30 are the same.
  • the bending angle of the entire bending member 30 can be obtained by measuring the bending angle for the first bending portion 30a, and the bending angle of the entire bending member 30 is twice the bending angle of the first bending portion 30a; Further, in the case where the center portion of the bent piece 30 is punched, the bending angles of the first bent portion 30a and the second bent portion 30b are practically impossible to be completely identical.
  • the apparatus may further comprise another set of rotating platforms, driving means, angle measuring means and distance measuring means provided for the second bent portion 30b of the bending piece 30, the control means 500 further Calculating a bending angle of the second bending portion 30b of the bending member 30, and adding the bending angle to a bending angle of the first bending portion 30a of the bending member 30 to obtain a The bending angle of the bending member 30 is described. Thereby, it is possible to reduce the possibility of using the above-described method of measuring the bending angle of the first bent portion 30a and using the bending angle of 2 times as the bending angle of the entire bending member 30, thereby making the measurement more accurate.
  • the bending The first bent portion 30a and the second bent portion 30b of the member 30 have different bending angles due to factors such as mass, and it is also necessary to separately measure the first bent portion 30a and the second bent portion 30b.
  • the bending angle that is, the bending angle measuring device needs to be disposed for the first bending portion 30a and the second bending portion 30b, respectively, and the measured first bending portion 30a and second bending portion 30b are The bending angles are added to serve as the bending angle of the entire bending member 30.
  • control device 500 uses the distance measured by the distance measuring device 300 as feedback to drive the rotating platform 100 to rotate until the distance from the first bending portion 30a of the bending member 30 measured by the distance measuring device 300 is the minimum. Describe the distance.
  • FIG. 4 is a flow chart showing the rotation process of the rotating platform 100 in the bending angle measuring device provided by the present invention.
  • the control device 500 records the initial distance measured by the distance measuring device 300 to the first bending portion 30a of the bending member 30, And controlling the driving device 400 to drive the rotating platform 100 to rotate in a bending direction of the first bending portion 30a in units of a first step length, and the distance measuring device is rotated for each step of the first step.
  • the measured distance from the first bent portion 30a of the bent piece 30 to the previous position of the first bent portion 30a of the bent piece 30 measured by the distance measuring device 300 at the time of the previous position Comparing the distances, if the current distance is less than the previous distance, it indicates that the rotating platform 100 is currently rotating in the direction that minimizes the distance from the first bending portion 30a of the bending member 30 measured by the distance measuring device 300, and continues to control.
  • the rotating platform 100 rotates in the bending direction of the first bending portion 30a in units of a first step length; if the current distance is greater than the previous distance, it indicates that the rotating platform 100 is excessively rotated, and the rotating platform 100 is controlled.
  • the distance measuring device 300 is substantially or completely perpendicular to the first of the bending members 30.
  • the portion 30a is bent.
  • FIG. 5 is a flow chart showing another rotation process of the rotating platform 100 in the bending angle measuring device provided by the present invention.
  • the control device 500 records the measurement of the first bending portion 30a of the bending member 30 by the distance measuring device 300.
  • the previous distance of 30a is compared, if the current distance is less than the previous distance, it indicates that the rotating platform 100 is currently rotating in a direction that minimizes the distance to the first bent portion 30a of the bending member 30 measured by the distance measuring device 300.
  • the step is rotated in units; if the current distance is greater than the previous distance, it indicates that the rotating platform 100 is excessively retracted, and the rotating platform 100 is controlled to retreat to the previous position and remain at the position, which is the adjustment mode.
  • the position in the equation that minimizes the distance to the first bent portion 30a of the bending member 30 measured by the distance measuring device 300 controls the rotating platform 100 to remain at the current position.
  • the distance measuring device 300 is further searched by using a fourth step smaller than the third step.
  • the measured position of the rotating platform to the first bent portion 30a of the bending member 30 is minimized to achieve higher precision.
  • the search may be further performed in a fifth step smaller than the fourth step according to the accuracy requirement, and the cycle is repeated until the minimum distance reached during the adjustment is equal to the initial minimum distance.
  • the second, third, fourth and fifth step lengths described above can be set according to the site conditions without affecting the adjustment time or adjusting the excess.
  • search method can determine the first step by using the second step. The approximate position, and then use the third step to fine-tune, the search efficiency is high, which is conducive to improving the real-time performance of the bending angle measuring device.
  • FIG. 6 is a flow chart of a method for measuring a bending angle provided by the present invention.
  • the method includes: adjusting the rotating platform 100 before the bending member 30 is bent, so that the distance measuring device 300 fixed on the rotating platform is perpendicular to the bending a first bent portion 30a of the member 30 ; after the bending member 30 is bent, the rotating platform 100 is rotated in a bending direction of the first bent portion 30a of the bent member 30, so that the The distance from the first bending portion 30a of the bending member 30 measured by the distance measuring device 300 is the smallest; and the rotation angle of the rotating platform 100 is measured, and the rotation angle is used as the number of the bending member 30
  • the bending angle of the bent portion 30a, and the bending angle of the bending member 30 is calculated based on at least the bending angle.
  • the bending angle of the bending member 30 may be twice the bending angle of the first bending
  • the method may further include: measuring a bending angle of the second bending portion 30b of the bending member 30; and bending the bending angle with the first bending portion 30a of the bending member 30 The folding angles are added to obtain the bending angle of the bending member 30.
  • the minimizing the distance to the first bending portion 30a measured by the distance measuring device 300 may include the following steps: after the bending member 30 is bent, recording the distance measuring device 300 Measuring the initial distance to the first bent portion 30a of the bending member 30, and rotating the rotating platform 100 in the bending direction of the first bending portion 30a in units of the first step length, Each time the first step is rotated, the current distance measured by the distance measuring device 300 is compared with the previous distance measured by the distance measuring device 300 at the previous position, and if the current distance is smaller than the previous distance, it indicates The rotating platform 100 is currently rotating in a direction that minimizes the distance measured by the distance measuring device 300, and continues to rotate the rotating platform 100 in the first step of the bending direction of the first bent portion 30a.
  • the rotating platform 100 is excessively rotated, and the rotating platform 100 is controlled to fall back to the previous position, which is the distance in the adjustment manner.
  • the position measured by the measuring device 300 to the first bending portion 30a of the bending member 30 is the smallest; if the current distance is equal to the previous distance, it indicates that the position where the rotating platform 100 is located, that is, the distance measurement in this adjustment mode.
  • the position at which the distance measured by the device 300 is the smallest controls the rotating platform 100 to remain at the current position.
  • the minimum distance of 30a may include the following steps: after the bending of the bending member 30, the initial distance to the first bending portion 30a of the bending member 30 measured by the distance measuring device 300 is recorded, and The rotating platform 100 is rotated in the bending direction of the first bending portion 30a by a second step, and the current distance measured by the distance measuring device 300 is changed with the previous one for each second step. Comparing the previous distances measured by the distance measuring device 300 at the time of the position, if the current distance If the distance is smaller than the previous distance, it indicates that the rotating platform 100 is currently rotating in the direction in which the distance measured by the distance measuring device 300 is the smallest, and continues in the bending direction of the first bending portion 30a by the second step.
  • the unit rotates the rotating platform 100; if the current distance is greater than or equal to the previous distance, it indicates that the rotating platform 100 is excessively rotated, and is controlled to be smaller than the second in a direction opposite to the bending direction of the first bending portion 30a.
  • the third step of the step is a unit rotation of the rotating platform 100, and the third distance is rotated, and the current distance measured by the distance measuring device 300 and the previous position are measured by the distance measuring device 300. Comparing the previous distances obtained, if the current distance is smaller than the previous distance, it indicates that the rotation of the rotating platform 100 is still excessive, and continues to rotate in the third step by the direction opposite to the bending direction of the first bending portion 30a.
  • the rotating platform 100 if the current distance is greater than the previous distance, indicating that the rotating platform 100 is excessively retracted, controlling the rotating platform 100 to retreat to the previous position, and Held in this position; if the current distance equal to the previous distance, it indicates the rotational position of the platform 100 is located so that the measuring apparatus 300 is the measured distance from the minimum position, the control of the rotation of the platform 100 remains in the current position.
  • the system is simple and the measurement principle is simple. Only distance measuring devices, angle measuring devices, stepping motors and control devices are required. It is only necessary to find the minimum distance from the measuring device to the bending piece during the measurement. And because it is a non-contact measurement, it does not affect the measurement during the operation.
  • the measurement accuracy is high, the accuracy of the distance measuring device can be up to the micron level, the accuracy of the angle measuring device can be 0.02°, and the accuracy of the stepping motor can be subdivided to a step angle of 0.02° and 250.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Description

一种弯折件的弯折角度测量设备及方法
技术领域
本发明涉及角度测量领域,并且尤其涉及一种检测被弯折工件的弯折角 度的测量设备及方法。 背景技术
母线弯折机是一种用于对母线进行加工的设备, 图 1示出了角度指示装 置在母线弯折机中的应用。如图 1所示,母线弯折机包括凹模 10和压头 20。 在应用该母线弯折机改变母线 30的弯折角度时,将母线 30置于所述凹模 10 中, 并利用压头 20对母线 30进行冲压, 从而改变母线 30的弯折角度。 在 该母线弯折机中, 对弯折角度的控制是通过角度指示装置来实现的。 该角度 指示装置包括顶杆 40、 指针 50以及刻度盘 60, 所述顶杆 40位于所述凹模 10内, 与所述指针 50相连, 且随着母线 30的挤压而向下运动, 从而带动指 针 50运动, 指示刻度盘 60上所显示的角度。 该角度指示装置的安装位置根 据顶杆 40上下的位移和母线弯折角度的对应关系而确定。
上述角度指示装置虽可实现弯折角度的测量,然而其安装误差对测量结 果的影响很大, 且由于经常受到冲击, 角度指示装置的损耗很大。
现有技术中还存在激光自准法、光学内发射法以及激光干涉来进行弯折 角度测量, 然而其存在以下缺点:
( 1 ) 激光自准法: 测量的分辨率与准直仪中透镜的焦距有关, 焦距越 长, 分辨率越高, 但透镜焦距过长会产生仪器本中和所占空间增大的问题。 此外, 基于光学自准法的测量仪器测量范围一般很小, 通常在几分和几十分 之间, 测量的分辨率也不理想。
(2 ) 光学内反射法: 该方法对环境要求高, 需要在暗室中进行, 同时 要求光源有较高的稳定性。
(3 ) 激光干涉法: 该方法对环境要求极为苛刻, 诸多外界因素 (如周 围空气流动)都会对测量结果产生很大的影响。 此外, 基于激光干涉法的仪 器结构精密、 稳定性不好、 体积大, 通常只作为一种测量基准和检测手段, 很难用于现场测量。 发明内容
为克服现有技术中弯折角度测量方案中的诸多缺陷,本发明特提供一种 机构简单、 适用范围广且测量结果准确的弯折角度测量设备及方法。
本发明提供的一种弯折件(该弯折件包括分别位于弯折件弯折点两侧的 第一弯折部分和第二弯折部分) 的弯折角度测量设备包括: 转动平台; 驱动 装置, 与所述转动平台机械连接, 用于驱动所述转动平台转动; 角度测量装 置, 用于测量所述转动平台的转动角度; 距离测量装置, 固定于所述转动平 台上, 用于测量该距离测量装置至所述弯折件的距离; 以及控制装置, 与所 述角度测量装置、 距离测量装置和驱动装置电连接, 用于根据距离测量装置 与弯折件的第一弯折部分之间的距离,控制所述驱动装置驱动所述转动平台 在所述弯折件第一弯折部分的弯折方向转动,直至所述距离测量装置所测得 的至所述弯折件的第一弯折部分的距离最小, 以所述角度测量装置所感测的 转动角度作为所述弯折件的第一弯折部分的弯折角度, 并至少根据该弯折角 度计算所述弯折件的弯折角度。
其中,所述弯折件的弯折角度可为所述弯折件的第一弯折部分的弯折角 度的 2倍。
其中,该设备可还包括针对所述弯折件的第二弯折部分设置的另一组转 动平台、 驱动装置、 角度测量装置以及距离测量装置, 所述控制装置还计算 所述弯折件的第二弯折部分的弯折角度, 并将该弯折角度与所述弯折件的第 一弯折部分的弯折角度相加, 以得出所述弯折件的弯折角度。
其中, 所述距离测量装置可测距传感器, 该测距传感器可为超声波测距 传感器、 激光测距传感器或红外线测距传感器。 所述角度测量装置可为角度 传感器, 该角度传感器可为固定于所述转动平台上的倾角传感器。
其中, 所述驱动装置可为步进电机。
其中,所述驱动装置与所述转动平台的机械连接可为蜗轮蜗杆连接或齿 轮连接。
另外, 本发明提供的一种用于对弯折件的弯折角度进行测量的方法包 括: 在所述弯折件发生弯折之前, 调节所述转动平台, 以使固定于该转动平 台上的距离测量装置垂直正对所述弯折件的第一弯折部分;在所述弯折件发 生弯折之后, 在所述弯折件的第一弯折部分的弯折方向转动所述转动平台, 使所述距离测量装置所测得的至所述弯折件的距离最小; 以及测量所述转动 平台的转动角度, 以该转动角度作为所述弯折件的第一弯折部分的弯折角 度, 并至少根据该弯折角度计算所述弯折件的弯折角度。
其中,所述弯折件的弯折角度可为所述弯折件的第一弯折部分的弯折角 度的 2倍。
其中,所述方法可还包括:测量所述弯折件的第二弯折部分的弯折角度; 以及将该弯折角度与所述弯折件的第一弯折部分的弯折角度相加, 以得出所 述弯折件的弯折角度。
其中,所述使所述距离测量装置所测得的至所述第一弯折部分的距离最 小包括以下步骤: 在弯折件发生弯折之后, 记录所述距离测量装置所测得的 至所述第一弯折部分的初始距离, 并在所述第一弯折部分的弯折方向上以第 一步长为单位转动所述转动平台, 每转动第一步长, 将所述距离测量装置所 测得的至所述第一弯折部分的当前距离与前一位置之时所述距离测量装置 所测得的至所述第一弯折部分的先前距离进行比较,如果当前距离小于先前 距离, 则继续在所述第一弯折部分的弯折方向上以第一步长为单位转动所述 转动平台; 如果当前距离大于先前距离, 则控制所述转动平台回退至前一位 置, 并保持在该位置; 如果当前距离等于先前距离, 则控制所述转动平台保 持在当前位置。
其中,所述使所述距离测量装置所测得的至所述第一弯折部分的距离最 小包括以下步骤: 在弯折件发生弯折之后, 记录所述距离测量装置所测得的 至所述弯折件的初始距离, 并在所述第一弯折部分的弯折方向上以第二步长 为单位转动所述转动平台, 每转动第二步长, 将所述距离测量装置所测得的 至所述第一弯折部分的当前距离与前一位置之时所述距离测量装置所测得 的至所述第一弯折部分的先前距离进行比较, 如果当前距离小于先前距离, 则继续在所述第一弯折部分的弯折方向上以第二步长为单位转动所述转动 平台; 如果当前距离大于或等于先前距离, 则控制在与所述第一弯折部分的 弯折方向相反的方向上以小于所述第二步长的第三步长为单位转动所述转 动平台, 每转动第三步长, 将所述距离测量装置所测得的至所述弯折件的当 前距离与前一位置之时所述距离测量装置所测得的至所述第一弯折部分的 先前距离进行比较, 如果当前距离小于先前距离, 则继续在与所述第一弯折 部分的弯折方向相反的方向上以第三步长为单位转动所述转动平台; 如果当 前距离大于先前距离, 则控制所述转动平台回退至前一位置, 并保持在该位 置; 如果当前距离等于先前距离, 则控制所述转动平台保持在当前位置。
本发明提供的弯折角度测量设备及方法可通过寻找距离测量装置至所 述弯折件的距离并使转动平台转动以使所述距离最小, 利用角度测量装置测 量转动平台的转动角度,从而可以以转动角度实现弯折件的第一弯折部分的 弯折角度的间接测量,之后利用该弯折件的第一弯折部分的弯折角度求得整 个弯折件的弯折角度。 本发明具有结构简单、 测量准确且对外界环境要求不 高的优点。 附图说明
图 1示出了角度指示装置在母线弯折机中的应用;
图 2为本发明提供的弯折角度测量设备的结构示意图;
图 3为示出了本发明提供的弯折角度测量设备的具体使用的示意图; 图 4为本发明提供的弯折角度测量设备中对转动平台的转动过程的流程 图;
图 5为本发明提供的弯折角度测量设备中对转动平台的另一转动过程的 流程图; 以及
图 6为本发明提供的弯折角度测量方法的流程图。 具体实施方式
为了让本发明的上述和其他目的、 特征和优点能更明显, 下文将配合所 附图示, 作详细说明如下。 此外, 在本发明的说明中, 相同的构件以相同的 符号表示, 于此合先叙明。
图 2为本发明提供的弯折角度测量设备的结构示意图, 图 3为示出了本 发明提供的弯折角度测量设备的具体使用的示意图。 如图 2和图 3所示, 本 发明提供了一种弯折件 30的弯折角度测量设备, 该弯折件 30包括分别位于 弯折件弯折点两侧的第一弯折部分 30a和第二弯折部分 30b, 该设备包括转 动平台 100、角度测量装置 200、距离测量装置 300、驱动装置 400以及控制 装置 500, 驱动装置 400与所述转动平台 100机械连接, 用于驱动所述转动 平台 100在所述弯折件 30的第一弯折部分 30a的弯折方向转动; 所述角度 测量装置 200用于测量所述转动平台 100的转动角度;所述距离测量装置 300 固定于所述转动平台 100上,用于测量该距离测量装置 300至所述弯折件 30 的第一弯折部分 30a的距离; 所述控制装置 500与所述角度测量装置 200、 距离测量装置 300和驱动装置 400电连接,用于根据距离测量装置 300与所 述弯折件 30的第一弯折部分 30a之间的距离, 控制所述驱动装置 400驱动 所述转动平台 100在所述弯折件 30的第一弯折部分 30a的弯折方向转动, 直至所述距离测量装置 300所测得的至所述弯折件 30的第一弯折部分 30a 的距离最小,以所述角度测量装置 200所感测的转动角度作为所述弯折件 30 的第一弯折部分 30a的弯折角度,并至少根据该弯折角度计算所述弯折件 30 的弯折角度。
其中, 所述控制装置 500可为单片机或 DSP等其他嵌入式系统, 其可 包含显示屏以对所述弯折件 30的弯折角度加以显示。
其中, 所述距离测量装置 300可为测距传感器, 该测距传感器可为超声 波测距传感器、激光测距传感器或红外线测距传感器。所述角度测量装置 200 可为角度传感器, 该角度传感器可为固定于所述转动平台 100上的倾角传感 器(诸如, 固体摆式倾角传感器、 液体摆式倾角传感器或气体摆式倾角传感 器), 该倾角传感器可随所述转动平台 100转动, 从而将其所感测的倾角作 为转动平台 100的转动角度;所述角度测量装置 200还可通过设于转动平台 100下方的两个测距传感器实现, 该测距传感器可分别测量至所述转动平台 100的距离,之后根据所测得的距离的差值与该两个测距传感器之间的距离, 利用三角函数关系式求得转动平台 100的转动角度。所述驱动装置 400可为 步进电机。 当然, 本发明并不限于此, 任何可实现测距、 角度测量以及驱动 转动平台 100转动的装置皆可应用于此。
其中,所述驱动装置 400与所述转动平台 100的机械连接可为本领域所 公知的各种连接方式, 优选为蜗轮蜗杆连接或齿轮连接, 该连接可使得驱动 装置 400至转动平台 100的传动平稳, 且精度高。
图 3为示出了本发明提供的弯折角度测量设备的具体使用的示意图。如 图 3所示,距离测量装置 300和角度测量装置 200 (在此以角度测量装置 200 为倾角传感器为例进行说明) 固定在转动平台 100上, 并且该转动平台 100 由驱动装置 400带动旋转, 从而组成一个闭环控制系统。 在弯折件 30平直 且没有发生弯折时(如图实线部分所示), 垂直正对弯折件 30的距离测量装 置 300测量出距弯折件 30的第一弯折部分 30a的距离, 此距离为距弯折件 30的第一弯折部分 30a的初始最小距离,该距离为角度测量装置 200调零的 基础。 在弯折件 30发生弯折时(如图虚线部分所示), 距离测量装置 300所 测量的距离 (该距离为距离测量装置 300至第一弯折部分 30a的距离)发生 变化, 控制装置 500以距离测量装置 300所测量的距离作为反馈, 使驱动装 置 400启动, 驱动转动平台 100转动, 从而带动角度测量装置 200和距离测 量装置 300转动, 直至距离测量装置 300测得至弯折件 30的第一弯折部分 30a的距离为所述最小距离时,驱动装置 400停止工作,此时倾角传感器 200 所测得角度即为弯折件 30的第一弯折部分 30a的弯折角度。
在此需要说明的是,对于对弯折件 30的中心部位进行冲压的情形而言, 所述弯折件 30的第一弯折部分 30a和第二弯折部分 30b的弯折角度是一样 的, 此时针对第一弯折部分 30a测量弯折角度即可求出整个弯折件 30的弯 折角, 整个弯折件 30的弯折角为第一弯折部分 30a的弯折角度的两倍; 另外, 对于对弯折件 30的中心部位进行冲压的情形而言, 第一弯折部 分 30a和第二弯折部分 30b的弯折角度实际上不可能完全一致。 因此, 优选 地, 所述设备还可包括针对所述弯折件 30的第二弯折部分 30b设置的另一 组转动平台、驱动装置、角度测量装置以及距离测量装置,所述控制装置 500 还计算所述弯折件 30的第二弯折部分 30b的弯折角度, 并将该弯折角度与 所述弯折件 30的第一弯折部分 30a的弯折角度相加, 以得出所述弯折件 30 的弯折角度。 藉此, 可减小采用上述测第一弯折部分 30a的弯折角度、 并以 2倍该弯折角度作为整个弯折件 30的弯折角度的方法所可能产生误差,使测 量更加准确。
另外, 对于对弯折件 30的非中心部位进行冲压的情形而言, 所述弯折 件 30的第一弯折部分 30a和第二弯折部分 30b因为质量等因素的影响, 其 弯折角度是不同的, 此时也需要分别测量第一弯折部分 30a和第二弯折部分 30b的弯折角度, 即需要针对第一弯折部分 30a和第二弯折部分 30b分别布 设上述弯折角度测量设备, 并将所测得的第一弯折部分 30a和第二弯折部分 30b的弯折角度相加, 以作为整个弯折件 30的弯折角度。
下面对控制装置 500如何以距离测量装置 300所测得距离作为反馈来驱 动转动平台 100转动、 直至距离测量装置 300所测得的至弯折件 30的第一 弯折部分 30a的距离为最小距离为止进行描述。
图 4为本发明提供的弯折角度测量设备中对转动平台 100的转动过程的 流程图。 如图 4所示, 在弯折件 30发生弯折之后, 所述控制装置 500记录 所述距离测量装置 300所测得的至所述弯折件 30的第一弯折部分 30a的初 始距离, 并控制所述驱动装置 400驱动所述转动平台 100在所述第一弯折部 分 30a的弯折方向上以第一步长为单位进行转动, 每转动第一步长, 将所述 距离测量装置 300所测得的至弯折件 30的第一弯折部分 30a的当前距离与 前一位置之时所述距离测量装置 300所测得的至弯折件 30的第一弯折部分 30a的先前距离进行比较,如果当前距离小于先前距离,则表明转动平台 100 目前正朝着使距离测量装置 300所测得的至弯折件 30的第一弯折部分 30a 的距离最小的方向转动, 继续控制所述转动平台 100 在所述第一弯折部分 30a的弯折方向上以第一步长为单位进行转动;如果当前距离大于先前距离, 则表明转动平台 100转动过量, 控制所述转动平台 100回退至前一位置, 并 保持在该位置, 该位置即为此调节方式中使得距离测量装置 300所测得的至 弯折件 30的第一弯折部分 30a的距离最小的位置; 如果当前距离等于先前 距离, 则表明转动平台 100所处的位置即为此调节方式中使得距离测量装置 300所测得的至弯折件 30的第一弯折部分 30a的距离最小的位置,控制所述 转动平台 100保持在当前位置。在此需要说明的是, 所述第一步长需要足够 小, 以使得对转动平台 100的调节非常精细, 可实现此调节方式中的最小距 离非常接近所述初始最小距离, 也就是使得距离测量装置 300基本或完全垂 直正对弯折件 30的第一弯折部分 30a。
图 5为本发明提供的弯折角度测量设备中对转动平台 100的另一转动过 程的流程图。 优选地, 如图 5所示, 在弯折件 30发生弯折之后, 所述控制 装置 500记录所述距离测量装置 300所测得的至所述弯折件 30的第一弯折 部分 30a的初始距离, 并控制所述驱动装置 400驱动所述转动平台 100在所 述第一弯折部分 30a的弯折方向上以第二步长为单位进行转动, 每转动第二 步长, 将所述距离测量装置 300所测得的至弯折件 30的第一弯折部分 30a 的当前距离与前一位置之时所述距离测量装置 300所测得的至弯折件 30的 第一弯折部分 30a的先前距离进行比较, 如果当前距离小于先前距离, 则表 明转动平台 100目前正朝着使距离测量装置 300所测得的至弯折件 30的第 一弯折部分 30a的距离最小的方向转动, 继续控制所述转动平台 100在所述 第一弯折部分 30a的弯折方向上以第二步长为单位进行转动; 如果当前距离 大于或等于先前距离,则表明转动平台 100转动过量,控制所述转动平台 100 在与所述第一弯折部分 30a的弯折方向相反的方向上以小于所述第二步长的 第三步长为单位进行转动, 每转动第三步长, 将所述距离测量装置 300所测 得的至弯折件 30的第一弯折部分 30a的当前距离与前一位置之时所述距离 测量装置 300所测得的至弯折件 30的第一弯折部分 30a的先前距离进行比 较, 如果当前距离小于先前距离, 则表明转动平台 100转动依旧过量, 继续 控制所述转动平台 100在与所述第一弯折部分 30a的弯折方向相反的方向上 以第三步长为单位进行转动; 如果当前距离大于先前距离, 则表明转动平台 100回退过量, 控制所述转动平台 100回退至前一位置, 并保持在该位置, 该位置即为此调节方式中使得距离测量装置 300所测得的距离最小的位置; 如果当前距离等于先前距离, 则表明转动平台 100所处的位置即为此调节方 式中的使得距离测量装置 300所测得的至弯折件 30的第一弯折部分 30a的 距离最小的位置, 控制所述转动平台 100保持在当前位置。
在上述对转动平台 100进行调整以使得距离测量装置 300所测得的至弯 折件 30的第一弯折部分 30a的距离最小的过程中, 还可在以第三步长为单 位找寻到一使距离测量装置 300所测得的至弯折件 30的第一弯折部分 30a 的距离最小的转动平台位置之后,采用比第三步长小的第四步长进一步搜索 使距离测量装置 300所测得的至弯折件 30的第一弯折部分 30a的距离最小 的转动平台位置, 以达到更高的精度。 之后, 还可根据精确度的需求, 以比 第四步长小的第五步长进一步进行搜索, 以此循环往复, 直至此调节过程中 所达到的最小距离等于所述初始最小距离为止。 上述第二、 第三、 第四以及 第五步长可在既不影响调节时间, 又不能调节过量的原则下, 根据现场情况 进行设定。
当然,利用其他搜索方法来搜索使得距离测量装置 300所测得距离最小 的转动平台 100位置亦是可以的,然而优选采用本发明所提供的上述搜索方 法,该方法可利用第二步长确定一大致位置,之后再利用第三步长进行微调, 搜索效率高, 有利于提高弯折角度测量设备的实时性。
另外, 本发明还提供以一种用于对弯折件的弯折角度进行测量的方法。 图 6为本发明提供的弯折角度测量方法的流程图。 如图 6所示, 所述方法包 括: 在所述弯折件 30发生弯折之前, 调节所述转动平台 100, 以使固定于该 转动平台上的距离测量装置 300 垂直正对所述弯折件 30 的第一弯折部分 30a; 在所述弯折件 30发生弯折之后, 在所述弯折件 30的第一弯折部分 30a 的弯折方向转动所述转动平台 100, 使所述距离测量装置 300所测得的至所 述弯折件 30的第一弯折部分 30a的距离最小; 以及测量所述转动平台 100 的转动角度, 以该转动角度作为所述弯折件 30的第一弯折部分 30a的弯折 角度, 并至少根据该弯折角度计算所述弯折件 30的弯折角度。 其中,所述弯折件 30的弯折角度可为所述弯折件 30的第一弯折部分 30a 的弯折角度的 2倍。
其中, 所述方法还可包括: 测量所述弯折件 30的第二弯折部分 30b的 弯折角度; 以及将该弯折角度与所述弯折件 30的第一弯折部分 30a的弯折 角度相加, 以得出所述弯折件 30的弯折角度。
其中, 所述使所述距离测量装置 300所测得的至所述第一弯折部分 30a 的距离最小可包括以下步骤: 在弯折件 30发生弯折之后, 记录所述距离测 量装置 300所测得的至所述弯折件 30的第一弯折部分 30a的初始距离, 并 在所述第一弯折部分 30a的弯折方向上以第一步长为单位转动所述转动平台 100, 每转动第一步长, 将所述距离测量装置 300所测得的当前距离与前一 位置之时所述距离测量装置 300所测得的先前距离进行比较, 如果当前距离 小于先前距离, 则表明转动平台 100目前正朝着使距离测量装置 300所测得 的距离最小的方向转动, 继续在所述第一弯折部分 30a的弯折方向上以第一 步长为单位转动所述转动平台 100; 如果当前距离大于先前距离, 则表明转 动平台 100转动过量, 控制所述转动平台 100回退至前一位置, 该位置即为 此调节方式中使得距离测量装置 300所测得的至弯折件 30的第一弯折部分 30a的距离最小的位置; 如果当前距离等于先前距离, 则表明转动平台 100 所处的位置即为此调节方式中使得距离测量装置 300所测得的距离最小的位 置, 控制所述转动平台 100保持在当前位置。
优选地, 所述使所述距离测量装置 300 所测得的至所述第一弯折部分
30a的距离最小可包括以下步骤:在弯折件 30发生弯折之后, 记录所述距离 测量装置 300所测得的至所述弯折件 30的第一弯折部分 30a的初始距离, 并在所述第一弯折部分 30a的弯折方向上以第二步长为单位转动所述转动平 台 100, 每转动第二步长, 将所述距离测量装置 300所测得的当前距离与前 一位置之时所述距离测量装置 300所测得的先前距离进行比较, 如果当前距 离小于先前距离, 则表明转动平台 100目前正朝着使距离测量装置 300所测 得的距离最小的方向转动, 继续在所述第一弯折部分 30a的弯折方向上以第 二步长为单位转动所述转动平台 100; 如果当前距离大于或等于先前距离, 则表明转动平台 100转动过量, 控制在与所述第一弯折部分 30a的弯折方向 相反的方向上以小于所述第二步长的第三步长为单位转动所述转动平台 100, 每转动第三步长, 将所述距离测量装置 300所测得的当前距离与前一 位置之时所述距离测量装置 300所测得的先前距离进行比较, 如果当前距离 小于先前距离, 则表明转动平台 100转动依旧过量, 继续在与所述第一弯折 部分 30a 的弯折方向相反的方向上以第三步长为单位转动所述转动平台 100; 如果当前距离大于先前距离, 则表明转动平台 100回退过量, 控制所 述转动平台 100回退至前一位置, 并保持在该位置; 如果当前距离等于先前 距离, 则表明转动平台 100所处的位置即为使得距离测量装置 300所测得的 距离最小的位置, 控制所述转动平台 100保持在当前位置。
本发明的弯折角度测量方案与同类方案相比, 具有以下优点:
( 1 )系统简单, 测量原理简单。 只需要距离测量装置、 角度测量装置、 步进电机以及控制装置。测量时只需要找到距离测量装置到弯折件的最小距 离即可。 而且由于是无接触测量, 在作业过程中不影响测量。
(2) 测量精度高, 距离测量装置的精度可以到微米级, 角度测量装置 的精度可以到 0.02°, 步进电机精度可以到步距角 0.02°且 250细分。
( 3 ) 采用效率高的最小距离搜索方法, 可以实现对距离测量装置的准 确定位和实时测量。
虽然本发明已通过上述实施例所公开,然而上述实施例并非用以限定本 发明, 任何本发明所属技术领域中技术人员, 在不脱离本发明的精神和范围 内, 应当可以作各种的变动与修改。 因此本发明的保护范围应当以所附权利 要求书所界定的范围为准。

Claims

权利要求
1、 一种弯折件的弯折角度测量设备, 该弯折件包括分别位于弯折件弯 折点两侧的第一弯折部分 (30a) 和第二弯折部分 (30b), 该设备包括: 转动平台 (100);
驱动装置 (400), 与所述转动平台 (100 ) 机械连接, 用于驱动所述转 动平台 (100 ) 在所述弯折件的第一弯折部分 (30a) 的弯折方向转动; 角度测量装置 (200), 用于测量所述转动平台 (100) 的转动角度; 距离测量装置 (300), 固定于所述转动平台 (100 ) 上, 用于测量该距 离测量装置 (300) 至所述弯折件的第一弯折部分 (30a) 的距离; 以及 控制装置 (500), 与所述角度测量装置 (200)、 距离测量装置 (300 ) 和驱动装置 (400) 电连接, 用于根据距离测量装置 (300 ) 与所述弯折件的 第一弯折部分 (30a) 之间的距离, 控制所述驱动装置 (400) 驱动所述转动 平台 (100 )在所述弯折件的第一弯折部分 (30a) 的弯折方向转动, 直至所 述距离测量装置 (300)所测得的至所述弯折件的第一弯折部分 (30a) 的距 离最小, 以所述角度测量装置 (200 ) 所感测的转动角度作为所述弯折件的 第一弯折部分 (30a) 的弯折角度, 并至少根据该弯折角度计算所述弯折件 的弯折角度。
2、 根据权利要求 1所述的弯折角度测量设备, 其中, 所述弯折件的弯 折角度为所述弯折件的第一弯折部分 (30a) 的弯折角度的 2倍。
3、 根据权利要求 1所述的弯折角度测量设备, 其中, 该设备还包括针 对所述弯折件的第二弯折部分 (30b ) 设置的另一组转动平台、 驱动装置、 角度测量装置以及距离测量装置, 所述控制装置 (500 ) 还计算所述弯折件 的第二弯折部分 (30b ) 的弯折角度, 并将该弯折角度与所述弯折件的第一 弯折部分 (30a) 的弯折角度相加, 以得出所述弯折件的弯折角度。
4、 根据权利要求 1所述的设备, 其中, 所述距离测量装置 (300) 为测 距传感器, 该测距传感器为超声波测距传感器、 激光测距传感器或红外线测 距传感器, 所述角度测量装置 (200 ) 为角度传感器, 该角度传感器为固定 于所述转动平台 (100) 上的倾角传感器。
5、 根据权利要求 1所述的设备, 其中, 所述驱动装置 (400) 为步进电
6、 根据权利要求 1所述的设备, 其中, 所述驱动装置 (400) 与所述转 动平台 (100 ) 的机械连接为蜗轮蜗杆连接或齿轮连接。
7、 一种用于对弯折件的弯折角度进行测量的方法, 该弯折件包括分别 位于弯折件弯折点两侧的第一弯折部分 (30a) 和第二弯折部分 (30b), 其 中, 该方法包括:
在所述弯折件发生弯折之前, 调节转动平台 (100), 以使固定于该转动 平台 (100) 上的距离测量装置 (300) 垂直正对所述弯折件的第一弯折部分 (30a);
在所述弯折件发生弯折之后, 在所述弯折件的第一弯折部分 (30a) 的 弯折方向转动所述转动平台 (100), 使所述距离测量装置 (300) 所测得的 至所述弯折件的第一弯折部分 (30a) 的距离最小; 以及
测量所述转动平台 (100 ) 的转动角度, 以该转动角度作为所述弯折件 的第一弯折部分 (30a) 的弯折角度, 并至少根据该弯折角度计算所述弯折 件的弯折角度。
8、 根据权利要求 7所述的方法, 其中, 所述弯折件的弯折角度为所述 弯折件的第一弯折部分 (30a) 的弯折角度的 2倍。
9、 根据权利要求 7所述的方法, 其中, 所述方法还包括:
测量所述弯折件的第二弯折部分 (30b) 的弯折角度; 以及
将该弯折角度与所述第一弯折部分 (30a) 的弯折角度相加, 以得出所 述弯折件的弯折角度。
10、根据权利要求 7所述的方法,其中,所述使所述距离测量装置(300) 所测得的至所述第一弯折部分 (30a) 的距离最小包括以下步骤:
在弯折件发生弯折之后, 记录所述距离测量装置 (300) 所测得的至所 述第一弯折部分 (30a) 的初始距离, 并在所述第一弯折部分 (30a) 的弯折 方向上以第一步长为单位转动所述转动平台 (100), 每转动第一步长, 将所 述距离测量装置 (300)所测得的至所述第一弯折部分 (30a) 的当前距离与 前一位置之时所述距离测量装置(300)所测得的至所述第一弯折部分(30a) 的先前距离进行比较,
如果当前距离小于先前距离, 则继续在所述第一弯折部分(30 ) 的弯折 方向上以第一步长为单位转动所述转动平台 (100 );
如果当前距离大于先前距离, 则控制所述转动平台 (100 ) 回退至前一 位置, 并保持在该位置;
如果当前距离等于先前距离, 则控制所述转动平台 (100 ) 保持在当前 位置。
11、根据权利要求 7所述的方法,其中,所述使所述距离测量装置(300) 所测得的至所述第一弯折部分 (30a) 的距离最小包括以下步骤:
在弯折件发生弯折之后, 记录所述距离测量装置 (300) 所测得的至所 述第一弯折部分 (30a) 的初始距离, 并在所述第一弯折部分 (30a) 的弯折 方向上以第二步长为单位转动所述转动平台 (100), 每转动第二步长, 将所 述距离测量装置 (300)所测得的至所述第一弯折部分 (30a) 的当前距离与 前一位置之时所述距离测量装置(300)所测得的至所述第一弯折部分(30a) 的先前距离进行比较,
如果当前距离小于先前距离, 则继续在所述第一弯折部分 (30a) 的弯 折方向上以第二步长为单位转动所述转动平台 (100);
如果当前距离大于或等于先前距离, 则在与所述第一弯折部分 (30a) 的弯折方向相反的方向上以小于所述第二步长的第三步长为单位转动所述 转动平台 (100), 每转动第三步长, 将所述距离测量装置 (300) 所测得的 至所述第一弯折部分 (30a) 的当前距离与前一位置之时所述距离测量装置 (300 ) 所测得的至所述第一弯折部分 (30a) 的先前距离进行比较,
如果当前距离小于先前距离, 则继续在与所述第一弯折部分 (30a) 的弯折方向相反的方向上以第三步长为单位转动所述转动平台 (100); 如果当前距离大于先前距离, 则控制所述转动平台 (100)回退至前 一位置, 并保持在该位置;
如果当前距离等于先前距离, 则控制所述转动平台 (100)保持在当 前位置。
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