Sensor mounting angle selecting method for three-point method roundness error isolation technology

A roundness error and installation angle technology, applied in the field of high-precision measurement of precision rotating bodies, can solve the problems of wrong error separation results, affecting the roundness error separation accuracy, etc., to avoid accuracy loss, short angle selection period, and simple derivation process. Effect

Active Publication Date: 2015-02-25
XIDIAN UNIV
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Problems solved by technology

Since the harmonic characteristics of the weight function in error separation are directly related to the sensor angle, even a small change in the installation angle of the sensor may cause significant harmonic suppression in the weight function, thereby affecting the accuracy of roundness error separation, and even leading to wrong error separation results

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  • Sensor mounting angle selecting method for three-point method roundness error isolation technology
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  • Sensor mounting angle selecting method for three-point method roundness error isolation technology

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Embodiment Construction

[0030] The process of the present invention is as figure 1 As shown, below in conjunction with accompanying drawing the embodiment of the present invention is described in detail:

[0031] 1. Representation formula of weight function in three-point roundness error separation technology

[0032] Such as figure 2 As shown, three sensors are installed in the radial direction of the measured circular section 4, then according to the three-point roundness error separation technology, the weight function expression can be derived as:

[0033] H(ω)=c 0 e jω0 +c 1 e jωα +c 2 e jωβ

[0034] The modulus expression of the available weight function is:

[0035] | H ( ω ) | = [ 1 + - sin β sin ...

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Abstract

The invention belongs to the field of precision revolution body high-precision measuring and particularly relates to a sensor mounting angle selecting method for a three-point method roundness error isolation technology. On the basis of the three-point method roundness error isolation technology, the character of a weight function during an isolation process is combined, a specific value is not used as a selecting target of a sensor mounting angle any longer, under the condition of a range where certain errors are allowed, angle combination sets which accord with the preset condition are screened, and then the best sensor mounting angle combination is obtained by comparing. Compared with a traditional angle selecting method, the phenomenon of weight function harmonic suppression caused by sensor mounting errors is effectively controlled, and when a sensor mounting angle deviates from a preset angle slightly, the precision of an error isolation process can still be guaranteed. A complex data post-processing step is of no need, an angle selecting cycle is short, an implementation process is simple, a deducing process is simple, and computer programming can be well achieved.

Description

technical field [0001] The invention belongs to the technical field of high-precision measurement of precision rotary bodies, and in particular relates to a method for selecting a sensor installation angle used in a three-point roundness error separation technology, which can effectively reduce the harmonic suppression of weight functions caused by sensor installation deviations phenomenon, thereby improving the accuracy of error separation. Background technique [0002] Because the three-point method error separation technology has the advantage of being able to measure on the machine, it is widely used in the industrial field. This method requires three displacement sensors to be coplanarly installed at a certain angle, and the selection of the sensor installation angle has a great influence on the accuracy of error separation. In the traditional method, the ideal installation angle of the sensor is generally obtained by optimizing the weight function, but the actual inst...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00
CPCG01B21/00
Inventor 章云邱海龙张大兴魏乔
Owner XIDIAN UNIV
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