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Grating type lever structure stylus displacement sensor and measurement method

A displacement sensor and sensor technology, applied in the field of measuring instruments, can solve the problems of low signal sensitivity, difficult high-resolution precision measurement of instruments, large linear error, etc., and achieve the effect of accurate signal output, no time drift, and small linear error

Active Publication Date: 2016-01-20
HARBIN MEASURING & CUTTING TOOL GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sensor using the inductive principle will have large linear error and low signal sensitivity in a large range, making it difficult for the instrument to achieve high-resolution precision measurement of the measured surface in a large range

Method used

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  • Grating type lever structure stylus displacement sensor and measurement method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A grating type lever structure stylus displacement sensor, which consists of: a sensor base 1, the sensor base is equipped with a rotary shaft 2, a sensor lever 3, a grating reading head 4 and a pen lifting mechanism 5, the front end of the sensor lever Connect the stylus holder 7, the grating scale 6 is pasted on the arc surface of the tail of the sensor lever, the rear end of the sensor lever is connected to the damper 8 through the connecting piece, and the stylus holder is connected to the stylus 10 through the measuring rod 9 , the measuring rod is equipped with force measuring adjustment weight 11. The radius of the arc surface is equal to the distance between a point on the centerline of the arc surface of the sensor lever and the center of rotation of the rotary shaft.

[0022] As for the grating type lever structure stylus displacement sensor, the pen lifting mechanism includes a motor, and the motor is connected to a rotating shaft 12 , and the rotating sh...

Embodiment 2

[0026] A method of measuring using the above-mentioned sensor. When the displacement of the stylus changes, a relative displacement occurs between the grating scale of the grating system and the grating reading head, thereby converting the displacement of the stylus into an electrical signal sent by the grating reading head ;An automatic switch or a manual switch is installed on the sensor panel, and the electric signal sent by the grating system determines the control signal of the pen-lifting action; the motor rotates under the control of the pen-lifting signal, driving the pen-lifting frame to rotate around the shaft; when the switch is placed in the manual state , the sensor does not lift the pen during the measurement return process, and does not execute the pen-up and pen-down commands issued by the computer; when the switch is placed in the automatic state, the sensor can complete the pen-up and pen-down actions under the control of the computer. When the command is re...

Embodiment 3

[0028] The grating-type lever structure stylus displacement sensor described in embodiment 1 or 2, the grating-type lever structure stylus displacement sensor, consists of a stylus, a measuring rod, a measuring rod frame, a sensor lever, a rotary shaft, a grating ruler, a reading head, and a lifter. It is composed of a pen mechanism and a damper, and a grating system composed of a grating ruler and a reading head is used as a signal conversion element.

[0029] The sensor stylus is fixed on the front end of the measuring rod, and the rear end of the measuring rod is rigidly connected to the front end of the sensor lever through the measuring rod frame; The reading window of the sensor maintains a constant distance from the metal grating ruler pasted on the arc surface of the sensor lever; The displacement is proportional to the displacement of the stylus, so that the displacement of the stylus is converted into an electrical signal from the grating reading head.

[0030] ...

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Abstract

Grating type lever structure stylus displacement sensor and measurement method 。 The stylus surface profile measuring instrument and surface shape measuring instrument are instruments that use the stylus scanning method to measure the distance, angle, arc radius and other parameters of the two-dimensional shape of the workpiece surface. The stylus sensor is a surface profile measuring instrument and surface shape measuring instrument. The instrument is an important part used to collect the profile information of the measured surface. The composition of this product includes: sensor substrate （ 1 ） , the sensor base is equipped with a rotary shaft （ 2 ） , sensor lever （3） , grating read head （4） and pen lift mechanism （5） , the front end of the sensor lever is connected to the stylus holder （7） , the arc surface of the tail of the sensor lever sticks the grating scale （6） , the rear end of the sensor lever is connected to the damper through the connecting piece （8） , the stylus holder passes through the stylus （9） Connect the stylus （10） , the measuring rod is equipped with force-measuring adjustment weights （11） 。 The invention is used for measuring workpieces.

Description

technical field [0001] The invention relates to the field of measuring instruments, in particular to a grating type lever structure stylus displacement sensor and a measuring method. Background technique [0002] The stylus surface profile measuring instrument and surface shape measuring instrument are instruments that use the stylus scanning method to measure the distance, angle, arc radius and other parameters of the two-dimensional shape of the workpiece surface. The stylus sensor is a surface profile measuring instrument and surface shape measuring instrument. The instrument is an important part used to collect the profile information of the measured surface. [0003] The sensor of the surface profile measuring instrument is mostly a lever structure. The stylus at the front end of the sensor perceives the geometric position of the measured point on the measured surface, and the displacement of the stylus tip is transmitted to the signal conversion system in the sensor th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02
Inventor 郎岩梅方成根曹鹏
Owner HARBIN MEASURING & CUTTING TOOL GROUP CO LTD
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