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Grating lever-structured contact-pin displacement sensor and measuring method thereof

A displacement sensor and sensor technology, applied in the field of measuring instruments, can solve the problems that the instrument is difficult to measure accurately with high resolution, low signal sensitivity, and large linear error, and achieve the effects of no time drift, accurate signal output, and small linear error.

Active Publication Date: 2011-07-20
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 lever-structured contact-pin displacement sensor and measuring method thereof
  • Grating lever-structured contact-pin displacement sensor and measuring method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 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.

[0020] 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 shaft ...

Embodiment 2

[0024] 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 retu...

Embodiment 3

[0026] 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.

[0027] 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.

[0028] The ...

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Abstract

The invention discloses a grating lever-structured contact-pin displacement sensor and a measuring method thereof. The grating lever-structured contact-pin displacement sensor is characterized in that a contact-pin surface profile measuring apparatus and a surface shape measuring apparatus are used for measuring the parameters such as the distances, angles, arc radiuses, and the like of two-dimensional shapes on the surfaces of workpieces by a contact pin scanning method, and a contact-pin sensor is an important component of the surface profile measuring apparatus and the surface shape measuring apparatus and used for acquiring the measured surface profile information. The grating lever-structured contact-pin displacement sensor disclosed by the invention comprises a sensor substrate (1); the sensor substrate is provided with a rotary shaft (2), a sensor lever (3), a grating reading head (4) and a pen-rising mechanism (5); and the front end of the sensor lever is connected with a measuring pin rack (7), a grating ruler (6) is adhered to an arc surface at the tail part of the sensor lever, the rear end of the sensor lever is connected with a damper (8) by a connecting sheet, the measuring pin rack is connected with a measuring pin (10) by a measuring bar (9), and the measuring bar is provided with a force adjustment weight (11). The grating lever-structured contact-pin displacement sensor disclosed by the invention is used for measurement.

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 Applications(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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