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Radius of turntable and mounting eccentric four-index coordinate incremental detection method and detection device

A technology of coordinate increment and turntable, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of inconvenient measurement, low precision, and inability to achieve, and achieve the effect of simple and practical device, high precision, and easy realization.

Inactive Publication Date: 2020-04-10
耿佳钰
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Problems solved by technology

This method cannot be realized for large-size discs or partial disc components
[0004] In addition, the measurement of the size (radius or diameter) of large-size discs or partial discs often uses general-purpose equipment such as three-coordinate measuring instruments and measuring microscopes. The indirect measurement method of calculating the radius by measuring the length of the chord and the height of the chord has always been inconvenient to measure. The problem of low precision

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  • Radius of turntable and mounting eccentric four-index coordinate incremental detection method and detection device
  • Radius of turntable and mounting eccentric four-index coordinate incremental detection method and detection device
  • Radius of turntable and mounting eccentric four-index coordinate incremental detection method and detection device

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0038] A method for detecting the radius of a turntable and installation eccentric four-index coordinate increment, comprising the following steps:

[0039] a. Establish the four-index coordinate incremental equation;

[0040]

[0041] Among them: x and y are respectively a point A on the circumference of the turntable when the standard turntable is at the initial angle α position 0 In the object space coordinate system X, Y coordinate value, A 0 The corresponding object space position point A is a fixed point; a and b are the deviations between the center O' of the turntable and the center O of the rotation axis on the imaging plane in the X and Y directions when the standard turntable is at the initial position, that is, the X and Y of the eccentric initial position Coordinate value; θ i is the rotation angle of the current index of th...

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Abstract

The invention relates to a method and a device for detecting a turntable radius and installation eccentricity four-rotation-position coordinate increments. A rotating shaft of a tested turntable component is fixed on a standard turntable, a circumferential eccentric rotation position fixed point coordinate increment equation set of each point of four rotation positions is established, the equationset is solved to obtain a central deviation coordinate of the turntable at an initial rotation position, and the turntable radius, the installation eccentricity and the central deviation of the turntable at any rotation position are calculated. The device is simple and practical and is easy to operate; the proposed method is simple, convenient, high in precision and is easy to implement, efficient and high-precision measuring device and method are provided for the size and error detection of turntable components, and reference is provided for the fine tuning of the concentricity of the turntable components. The method and device provided by the invention are suitable for the size and eccentricity error detection of the turntable components such as a circular grating, a mechanical modulation disk, a coded disk of a photoelectric encoder, and the like, and are especially suitable for the detection in which the eccentricity error of the turntable is relatively small, and the size and shape errors are much smaller than the eccentricity error.

Description

technical field [0001] The invention relates to a detection device and method for the size and error of a circular grating, a mechanical modulation disc, a code disc of a photoelectric encoder and other turntable components, especially a detection device and detection method for the radius of the turntable and the local image coordinate increment of the installation eccentric four indexing position. method. Background technique [0002] There is an installation error between the turntable (rotary disc) and its rotating shaft during installation, mainly due to the coaxiality error caused by the eccentricity of the rotating disc and the rotating shaft. This error directly affects the working stability of the turntable and the accuracy of the output signal, so the detection and debugging of this error is a necessary work for the production of turntable components. [0003] The existing eccentricity measurement method for turntable components needs to determine the center coord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/08G01B11/27
CPCG01B11/08G01B11/27
Inventor 耿佳钰
Owner 耿佳钰
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