CN102679928B - One-dimension measuring head with anti-collision protection and automatic steering functions - Google Patents

One-dimension measuring head with anti-collision protection and automatic steering functions Download PDF

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CN102679928B
CN102679928B CN 201210178215 CN201210178215A CN102679928B CN 102679928 B CN102679928 B CN 102679928B CN 201210178215 CN201210178215 CN 201210178215 CN 201210178215 A CN201210178215 A CN 201210178215A CN 102679928 B CN102679928 B CN 102679928B
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probe
dimensional
crash protection
block
ball bearing
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CN 201210178215
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CN102679928A (en )
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王洪喜
贾建军
王卫东
陈晓东
王建华
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西安工业大学
西安电子科技大学
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Abstract

本发明属于精密测量技术领域,具体涉及一种带防撞保护和自动转向功能的一维测头。 The present invention belongs to the technical field of precision measurement, particularly relates to a one-dimensional probe A tape crash protection and automatic steering function. 现有技术一维测头存在复杂形面换向的问题,因此测量效率低,同时在调试或测量过程中存在撞击损坏测头的问题。 The presence of the prior art one-dimensional probe complicate surface shape of the commutation, the measurement efficiency is low and therefore, the problem of impact damage while the presence of the probe or measurement during debugging. 本发明采用的技术方案为:带防撞保护和自动转向功能的一维测头,包括一维测头组件、防撞保护机构和换向机构,所述防撞保护机构包括设置于套筒内的动块、定块、连接板和一对片簧,一维测头组件固定联接在测头连接板上。 Aspect of the present invention is used are: with a crash protection and automatic steering function dimensional probe, the probe assembly comprising a one-dimensional, crash protection mechanisms and commutation means, said crash protection means comprises an inner sleeve disposed in the a movable block, a given block, the upper head connection plate and the connection plate pair of leaf springs, one-dimensional probe assembly secured coupled. 本发明结构简单,测头对外力响应迅速快,工作可靠,适用范围广泛,可广泛应用于各种环境下的接触式检测。 The present invention is of simple structure, the probe responsive to external forces fast, reliable, broad scope of application, contact-type detector can be widely used in various environments.

Description

带防撞保护和自动转向功能的一维测头 With a one-dimensional probe crash protection and automatic steering function

技术领域 FIELD

[0001] 本发明属于精密测量技术领域,具体涉及一种带防撞保护和自动转向功能的一维测头。 [0001] The present invention belongs to the field of precision measurement technology, particularly relates to a one-dimensional probe A tape crash protection and automatic steering function.

背景技术 Background technique

[0002] 齿轮测量仪的发展主要经历了机械展成和电子展成两个阶段。 [0002] Development of a gear measuring instrument is mainly subjected to mechanical and electronic Fair Fair into two phases. 不论是触发式测头还是扫描式测头,都是采用接触式探针与被测工件接触采集轮廓点,然后进行数据处理,进而得到被测工件的位置或形状信息。 Whether touch trigger probe or a scanning probe, the probe is a contact type in contact with the workpiece contour points collected, and data processing, and further obtain the location information, or the shape of the workpiece. 基于电子展成的齿轮测量中心,通过数控系统控制多轴进行复合运动,可以进行精确的比例传动,从而达到较高精度。 Based on electronic generative gear measuring center, composite multi-axis motion by the NC control system, it allows for precise transmission ratio, so as to achieve higher precision. 相对于国外齿轮测量中心,国内差距主要表现之一为:多采用一维测头测量技术,三维测头的测量修正技术国内发展不足。 Relative to foreign gear measurement center, the domestic gap is mainly one of: a one-dimensional multi-probe measurement technique, lack of three-dimensional measurement probe correction technique domestic development. 而一维电感测头,测量过程中需要改变测头敏感方向,并且在轴向进给方向是刚性的,在测量软件调试过程中或测量操作不当情况下容易出现测针与工件的撞击现象,造成测针折断和传感器损坏。 And an inductor-dimensional probe, the measurement probe during sensitive need to change direction, and the axial feed direction is rigid, in the measurement or measurement during software debugging operation in strike phenomenon is prone to irregularities in the stylus and the workpiece, causing broken stylus and the sensor is damaged. 此外,由于在测量齿轮刀具等有较为复杂的形面时,一维测头需要手动调整敏感方向,导致测量效率较低。 Further, since the measurement of gear cutting tools, which are more complex shaped surface, a dimensional probe need to manually adjust the sensitivity directions, resulting in lower efficiency measurement. 美国专利4720922中仅采用簧片保护探针,在中国专利ZL200420018875.6中通过转套手动实现换向功能,换向角度依据套筒上的刻度,其轴向触发产生轴向发讯起定位及保护作用,存在的问题是:具有手动换向机构,换向角度依据刻度,测量效率较低。 U.S. Patent No. 4,720,922 uses only the reed protection probe, to achieve commutation function in Chinese patent ZL200420018875.6 by manually rotating cylinder, the commutation angle according to the scale on the sleeve axially from the sender triggers the generation of an axial positioning and protection, there is a problem: a manual reversing mechanism, the commutation angle according to the scale, the measurement efficiency is low.

发明内容 SUMMARY

[0003] 本发明要解决的技术问题是提供一种带防撞保护和自动转向功能的一维测头,有效解决一维测头复杂形面换向的问题,提高测量效率,同时在调试或测量过程中解决撞击损坏测头的问题,起到保护测头的目的。 [0003] The present invention is to solve the technical problem of providing a crash protection and with a one-dimensional probe automatic steering function, effectively solve the problem of one-dimensional probe complex contoured commutated improve measurement efficiency while debugging or measurement process to solve the problem of impact damage probe, serve the purpose of protection of the probe.

[0004] 本发明采用的技术方案为:带防撞保护和自动转向功能的一维测头,包括一维测头组件、防撞保护机构和换向机构,所述防撞保护结构包括设置于套筒内的动块、定块、连接板和一对片簧,一维测头组件固定联接在测头连接板上,其特征在于:上述定块内侧设置有永久磁铁,该连接板端部设置有磁性材料块,永久磁铁与磁性材料块吸合设置,所述定块的端部固定连接有平行于测头连接板的转向连接板,转向连接板的另一端部上设置有接近开关,接近开关对应设置于动块的端部以外。 [0004] aspect of the present invention is used are: with a crash protection and automatic steering function dimensional probe, the probe assembly comprising a one-dimensional, and crash protection means reversing mechanism, the structure includes a crash protection to the movable block in the sleeve, a given block, the connecting plate and a pair of leaf springs, one-dimensional probe assembly coupled to the probe fixed to the connecting plate, wherein: said fixed inner block is provided with a permanent magnet, an end portion of the web block is provided with a magnetic material, a permanent magnet is provided with magnetic pull block, an end portion of the fixed block is fixed to the probe parallel to the web web steering, the steering portion is provided with a connecting plate on the other end of the proximity switch, It corresponds to the proximity switch is provided outside the end portion of the movable block.

[0005] 所述换向结构包括轴向连接于套筒后端的外壳,外壳中部轴向设置有贯通的由小到大设置的阶梯孔,阶梯孔内依次设置有角接触球轴承组件、推力球轴承组件、联轴器和压缩弹簧,步进电机设置于外壳的端部外侧,转轴穿设于角接触球轴承组件和推力球轴承组件内,推力球轴承组件一侧的转轴通过联轴器与步进电机连接,角接触球轴承组件一侧的转轴与转向连接板连接。 [0005] The transducer comprises a housing axially connecting the structure to the rear end of the sleeve, the housing is provided with ascending central axial through-hole of the ladder, with a stepped hole are sequentially disposed angular contact ball bearing assembly, thrust ball the outer end portion of the bearing assembly, coupling and a compression spring disposed in the housing of the stepping motor, the rotation shaft disposed through angular contact ball bearing assembly and a thrust ball bearing assembly, the bearing shaft assembly side through the thrust ball coupling and a stepping motor connected to the shaft angular contact ball bearing of the steering assembly side connecting plate.

[0006] 上述外壳内设置有穿线孔。 [0006] The inner housing is provided with threaded holes.

[0007] 本发明采用防撞机构和自动换向机构,将一维测头集成到该装置中,不但提高了一维测头测量的性能,而且这种设计装置原理可显著提高齿轮测量的效率和准确率。 [0007] The present invention uses anti-collision mechanism and automatic reversing mechanism, one-dimensional probe integrated into the device, not only improves the performance of one-dimensional measurement probe, but this design principle of the device can significantly increase the efficiency of the gear measurement and accuracy. 本发明相对于现有技术,具有如下优点和效果: With respect to the prior art the present invention has the following advantages and effects:

[0008] I)结构简单;同时具有防撞保护功能和自动换向功能,能够消除测头与工件的撞击从而达到保护目的,自动换向机构能够提高测量效率,减少人为干预。 [0008] I) simple structure; while having crash protection and automatic reversing function, to eliminate the impact of the probe with the workpiece so as to achieve the purpose of protection, automatic reversing mechanism can improve measurement efficiency and reduce human intervention.

[0009] 2)测头对外力响应迅速快,工作可靠。 [0009] 2) the probe responsive to external force fast, reliable.

[0010] 3)动块依靠永久磁铁的磁力与定块相吸,利用磁力的非线性保证正常工作过程中测针的稳定性,当发生意外碰撞时磁力会随着位移的增大迅速减小,测头所受撞击力迅速下降,实现对测头的保护。 [0010] 3) the movable block and the fixed block relies on magnetic attraction of the permanent magnet, the magnetic force to ensure stability of the nonlinear during normal operation of the stylus, the magnetic force decreases rapidly with the increase of the displacement when the collision accident , the probe impact forces suffered decreased rapidly achieve the protection of the probe.

[0011] 4)测头受力使动块靠近接近开关时,接近开关发出信号,使整个防撞保护装置后移,进一步保证测头不被损坏。 [0011] 4) the probe so that when the force moving the block close to the proximity switch, the proximity switch signals, the entire crash protection means after the shift, to further ensure that the probe is not damaged.

[0012] 5)检测具有复杂形面的工件时,不需要手动调整敏感方向,通过给电机发送指令控制旋转角度,达到精确调整探针敏感方向的目的。 When the [0012] 5) detecting a workpiece having a complicated surface shape, you do not need to manually adjust the sensitivity direction, by sending a control command to the motor rotation angle to achieve accurate adjustment of the direction-sensitive probe purposes.

[0013] 6 )适用范围广泛,可广泛应用于各种环境下的接触式检测。 [0013] 6) a wide range, contact-type detector can be widely used in various environments.

附图说明 BRIEF DESCRIPTION

[0014] 图1是实施例结构示意图。 [0014] FIG. 1 is a schematic structural embodiment.

[0015] 图2是图1的左视图。 [0015] FIG. 2 is a left side view of FIG.

[0016] 图3是图1的AA剖视图。 [0016] FIG. 3 is a sectional view AA of FIG. 1.

[0017] 图中,1-定块,2-动块,3-连接板,4-片簧,5-套筒,6_永久磁铁,7_磁性材料块,8-转向连接板,9-接近开关,10-角接触球轴承组件,11-推力球轴承组件,12-转轴,13-压缩弹簧,14-联轴器,15-步进电机,16-穿线孔,17-外壳。 [0017] FIG, 1 given block, the movable block 2-, 3- web, the leaf spring 4-, 5- sleeve, 6_ permanent magnet, a magnetic material block 7_, 8- steering web, 9- proximity switch, 10- angular contact ball bearing assembly, thrust ball bearing assembly 11-, 12- shaft, 13- compression spring, 14 the coupling, the stepping motor 15, 16 threading hole, 17 of the housing.

具体实施方式 Detailed ways

[0018] 下面通过具体实施例对本发明进行详细描述。 [0018] The following detailed description of the specific embodiments of the present invention.

[0019] 参见图1一图3,带防撞保护和自动转向功能的一维测头,包括一维测头组件、防撞保护机构和换向机构,所述防撞保护结构包括设置于套筒5内的动块2、定块1、连接板3和一对片簧4,一维测头组件固定联接在测头连接板3上。 [0019] Referring to FIG 1 to FIG 3 a with a crash protection and automatic steering function dimensional probe, the probe assembly comprising a one-dimensional, and crash protection means reversing mechanism, the structure comprises a crash protection sleeve disposed the movable block in the cartridge 52, a given block, the connecting plate 3 and a pair of leaf springs 4, a one-dimensional probe assembly coupled to the probe fixed on the connecting plate 3. 所述定块I内侧设置有永久磁铁6,该连接板3端部设置有磁性材料块7,永久磁铁6与磁性材料块7吸合设置,所述定块I的端部固定连接有平行于测头连接板3的转向连接板8,转向连接板8的另一端部上设置有接近开关9,接近开关9对应设置于动块2的端部以外。 I inside the fixed block is provided with a permanent magnet 6, the connecting plate 3 is provided with a magnetic material end blocks 7, the permanent magnets 6 and the magnetic material disposed pull block 7, the fixed end portion of the block I is fixedly connected to the parallel probe 8 web steering link plate 3, is provided on the other end portion of the steering connecting plate 8 has a proximity switch 9, the proximity switch 9 is provided at a corresponding outside end portion of the movable block 2.

[0020] 所述换向结构包括轴向连接于套筒5后端的外壳17,外壳17中部轴向设置有贯通的由小到大设置的阶梯孔,阶梯孔内依次设置有角接触球轴承组件10、推力球轴承组件 [0020] The transducer comprises a housing axially connecting the structure to the rear end 17 of the sleeve 5, the center housing 17 is provided with an axial stepped bore therethrough disposed ascending stepped hole are sequentially disposed angular contact ball bearing assembly 10, thrust ball bearing assembly

11、联轴器14和压缩弹簧13,步进电机15设置于外壳17的端部外侧,转轴12穿设于角接触球轴承组件10和推力球轴承组件11内,推力球轴承组件11 一侧的转轴12通过联轴器14与步进电机15连接,角接触球轴承组件10 —侧的转轴12与转向连接板8连接。 11, the coupling 14 and the compression spring 13, the stepping motor 15 is provided at an end portion of the outer housing 17, the rotary shaft 12 is disposed through 11 angular contact ball bearing assembly 10 and thrust ball bearing assembly, thrust ball bearing assembly 11 side 12 is connected via a coupling shaft 14 and the stepping motor 15, angular contact ball bearing assembly 10 - spindle 12 side is connected to the steering link plate 8.

[0021] 上述外壳17内设置有穿线孔16。 [0021] The inner housing 17 has a threaded hole 16 is provided.

[0022] 本发明的装置包括防撞保护机构及自动换向机构,防撞保护机构通过转向连接板8与自动换向机构连接,当测头发生撞击等意外现象时,即测头外力大于定块I上永久磁铁6的吸力时,动块2将与定块I分离,片簧4弯曲度加大,动块2逼近接近开关9,接近开关9发出信号,使得整个防撞保护装置后移,保护测头不会受到损坏。 [0022] The device of the invention comprises a collision protection mechanism and automatically change the automatic reversing mechanism 8 is connected to the link plate through a steering mechanism, crash protection mechanism, when the probe impacts the like accident phenomena, i.e., an external force greater than a given probe after the suction block I when the permanent magnet 6, the movable block 2 is separated from the fixed block I, to increase the degree of curvature of the leaf spring 4, the movable block 9 2 Approximation proximity switch, the proximity switch 9 signals, so that the entire shift crash protection device protect the probe from being damaged. 当测量具有较为复杂的形面工件时,不需要手动调整敏感方向,通过给电机发送指令信号控制旋转角度,达到调整敏感方向的目的。 When the measurement has a more complex shaped surface of the workpiece, it does not need to manually adjust the sensitivity direction, by sending a command signal to control the rotation angle of the motor, the purpose of adjustment of the direction-sensitive. 步进电机15通过联轴器14与转轴12连接,转轴12通过螺钉与转向连接板8连接,当步进电机15旋转时,带动防撞保护机构和测头旋转,实现自动换向功能。 Stepper motor 14 is connected via a coupling 15 to the shaft 12, the steering shaft 12 and the connection plate 8 by a screw connection, when the stepping motor 15 rotates to drive the probe crash protection mechanism and rotation, automatic commutation function.

[0023] 在正常工作情况下定块与动块由磁力相吸,保证测头稳定,能够进行正常测量。 [0023] block and the movable block made up by the magnetic attraction, the probe to ensure stable, normal measurement can be performed during normal operation. 测头受到轴向力时,片簧弯曲,永磁力迅速减小,当动块移动靠近接近开关时,接近开关发出信号,使整个防撞保护装置后移,保证测头不被损坏。 When the probe is subjected to an axial force, the leaf spring is bent, the permanent magnetic force decreases rapidly, when the movable block is moved close to the proximity switch, the proximity switch signals, the entire crash protection means after the shift, to ensure that the probe is not damaged.

[0024] 本实施例中,所说的测头受力保护选用的是片簧4和永久磁铁6结构,两个片簧4与定块I和动块2组成了公知的铰链结构,定块I上的永久磁铁6与动块2上的磁性材料块7相吸,能够保证测头正常进行测量,而本发明动块2与定块I的连接创造性的采用了永久磁铁,当测头发生碰撞或其他意外现象时,测头受力超过永久磁铁6的吸合力时,定块I上的永久磁铁6与动块2上的磁性材料块7脱离,加大动块2的移动距离,动块2逼近接近开关9,接近开关9发出信号使整个装置向后移动,保护测头防止与被测工件碰撞而造成折断及其他损坏。 [0024] In this embodiment, said probe force protected optional leaf spring 4 permanent magnets 6 structure, two leaf springs 4 with a given block I and the movable block 2 is composed of a known hinge structure, a given block the permanent magnet and the magnetic material block I 6 7 attraction on the movable block 2, to ensure the normal measurement probe, and the present invention is given block and the movable block 2 is connected to I using the inventive permanent magnets, occurs when the probe when a collision or other accident phenomena, the probe force than the suction force of the permanent magnet 6, the fixed block I from the permanent magnets 67 and the magnetic material block 2 on the movable block, the movable block 2 to increase the moving distance of the movable 2 block 9 approaching the proximity switch, the proximity switch 9 signals the rearward movement of the entire device, prevent a collision with the probe protection workpiece and other damage caused by broken. 另外,由于在测量齿轮刀具等具有较为复杂的形面时,测头需要手动调整敏感方向,导致测量效率较低,本发明应用步进电机15驱动来实现自动换向。 Further, since the cutter or the like when measuring a gear shape having a more complex surface, the probe needs to manually adjust the sensitivity direction, resulting in a lower measured efficiency, application of the present invention, the stepping motor 15 drives to achieve automatic commutation. 所述的自动换向机构通过给步进电机15发出信号,通过控制脉冲个数来控制电机角位移量,从而达到自动换向的目的。 The automatic reversing mechanism by signals to the stepping motor 15 to control the angular displacement of the motor by controlling the number of pulses, so as to achieve the purpose of automatic commutation. 此自动换向机构是在步进电机15和转向连接板8之间加了转轴12,转轴12外面套了相应的推力球轴承组件11和角接触球轴承组件10,以及连接转轴12和步进电机15轴之间的联轴器14,为了固定推力球轴承组件11,用压缩弹簧13来顶住,使推力球轴承组件11定位。 This automatic reversing mechanism is a stepping motor 15 and the steering shaft applied between the connecting plate 12 8, the outer shaft 12 sets the corresponding thrust ball bearing assembly 11 and the angular contact ball bearing assembly 10 and a connecting shaft 12 and the step coupling 14 between the motor shaft 15, to the fixed thrust ball bearing assembly 11, with a compression spring 13 against the thrust ball bearing assembly 11 is positioned. 步进电机15轴的转动带动转轴12转动,角接触球轴承组件10保证转轴12精确转动,转向连接板8通过螺钉的连接和转轴12 —起转动,然后带动前面的防撞系统定块1、动块2 —起转动。 Rotation of the stepping motor drive shaft 15 rotates shaft 12, angular contact ball bearing assembly 10 to ensure the accurate rotary shaft 12 is rotated, the steering link plate 812 by a screw connection and the shaft - from the rotation, and then the front of the collision avoidance system driven by a predetermined block, the movable block 2 - from rotation. 步进电机15的旋转角度的大小控制的测头的旋转大小,实现测头自动换向功能。 The size of the rotary probe size of the control stepping motor 15 of the rotation angle of the probe to achieve automatic reverse function.

Claims (3)

  1. 1.带防撞保护和自动转向功能的一维测头,包括一维测头组件、防撞保护机构和换向机构,所述防撞保护机构包括设置于套筒(5)内的动块(2)、定块(I)、连接板(3)和一对片簧(4),一维测头组件固定联接在测头连接板(3)上,其特征在于:上述定块(I)内侧设置有永久磁铁(6 ),该连接板(3 )端部设置有磁性材料块(7 ),永久磁铁(6 )与磁性材料块(7 )吸合设置,所述定块(I)的端部固定连接在平行于测头连接板(3)的转向连接板(8)—端部上,转向连接板(8)的另一端部上设置有接近开关(9),接近开关(9)对应设置于动块(2)的端部以外。 1. With a crash protection and automatic steering function dimensional probe, the probe assembly comprising a one-dimensional, and commutation means crash protection mechanism, said mechanism comprising a crash protection provided on the moving block (5) in the sleeve (2), a given block (I), the connecting plate (3) and a pair of leaf springs (4), a one-dimensional probe assembly coupled to the probe fixed on the connecting plate (3), characterized in that: said fixed block (I ) is provided inside the permanent magnets (6), the web (3) is provided with magnetic material end blocks (7), the permanent magnets (6) and the block of magnetic material (7) disposed pull, said given block (I) end portion fixedly connected parallel to the probe plate (3), a steering plate (8) - end portions, is provided with a steering proximity switch (9) on the other end plate (8), the proximity switch (9 ) corresponding to the movable block is provided outside (2) of the end portion.
  2. 2.根据权利要求1所述带防撞保护和自动转向功能的一维测头,其特征在于:所述换向结构包括轴向连接于套筒(5)后端的外壳(17),外壳(17)中部轴向设置有贯通的由小到大设置的阶梯孔,阶梯孔内依次设置有角接触球轴承组件(10)、推力球轴承组件(11)、联轴器(14)和压缩弹簧(13),步进电机(15)设置于外壳(17)的端部外侧,转轴(12)穿设于角接触球轴承组件(10)和推力球轴承组件(11)内,推力球轴承组件(11) 一侧的转轴(12)通过联轴器(14)与步进电机(15)连接,角接触球轴承组件(10) —侧的转轴(12)与转向连接板(8)连接。 2. The belt according to claim 1 crash protection and automatic steering function of the one-dimensional probe, wherein: said diverting structure comprises axially connected to the sleeve (5) the rear end of the housing (17), the housing ( 17) is provided with a central axial stepped penetrating hole provided ascending stepped hole are sequentially disposed angular contact ball bearing assembly (10), a thrust ball bearing assembly (11), the coupling (14) and the compression spring (13), a stepping motor (15) disposed in the housing (17) of the outer end, the shaft (12) disposed through the angular contact ball bearing assembly (10) and a thrust ball bearing assembly (11), the thrust ball bearing assembly the shaft (12) one side (11) through a coupling (14) and a stepping motor (15), angular contact ball bearing assembly (10) - the rotary shaft (12) side of the steering plate (8).
  3. 3.根据权利要求2所述带防撞保护和自动转向功能的一维测头,其特征在于:所述外壳(17)内设置有穿线孔(16)。 According to claim 2 with a crash protection and automatic steering function dimensional probe, wherein: disposed within said housing (17) has a threaded bore (16).
CN 201210178215 2012-06-01 2012-06-01 One-dimension measuring head with anti-collision protection and automatic steering functions CN102679928B (en)

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CN104215205B (en) * 2014-09-17 2016-10-05 西安工业大学 Probe means for measuring the crankshaft
CN104406614B (en) * 2014-12-01 2017-07-11 哈尔滨同和光学精密机械有限公司 Center gear having a three-dimensional measurement function of the automatic anti-collision rotary probe head
CN104792879A (en) * 2015-05-05 2015-07-22 上海和伍新材料科技有限公司 Anti-collision device in longitudinal direction of ultrasonic probe

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US4720922A (en) 1985-09-10 1988-01-26 Carl-Zeiss-Stiftung, Heidenhim/Brenz Anti-collision device for the sensing head of a measuring machine
CN2793683Y (en) 2004-04-28 2006-07-05 哈尔滨精达测量仪器有限公司 Multiple-dimensional high-spin measuring bit
CN201059954Y (en) 2007-07-10 2008-05-14 鞍山维盛机电有限公司 Magnetic telescopic displacement sensor

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US3869799A (en) 1972-08-29 1975-03-11 Zeiss Stiftung Universal multi-coordinate sensor
US4720922A (en) 1985-09-10 1988-01-26 Carl-Zeiss-Stiftung, Heidenhim/Brenz Anti-collision device for the sensing head of a measuring machine
CN2793683Y (en) 2004-04-28 2006-07-05 哈尔滨精达测量仪器有限公司 Multiple-dimensional high-spin measuring bit
CN201059954Y (en) 2007-07-10 2008-05-14 鞍山维盛机电有限公司 Magnetic telescopic displacement sensor

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