CN105423909A - Profile measuring and data processing methods of non-continuous surfaces of large-scale high-speed revolution equipment - Google Patents

Profile measuring and data processing methods of non-continuous surfaces of large-scale high-speed revolution equipment Download PDF

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Publication number
CN105423909A
CN105423909A CN201510664091.3A CN201510664091A CN105423909A CN 105423909 A CN105423909 A CN 105423909A CN 201510664091 A CN201510664091 A CN 201510664091A CN 105423909 A CN105423909 A CN 105423909A
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China
Prior art keywords
measurement
data
capacitive transducer
gap
point
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CN201510664091.3A
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Chinese (zh)
Inventor
王雷
孙传智
谭久彬
赵勃
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Harbin Institute of Technology
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Harbin Institute of Technology
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Priority to CN201510664091.3A priority Critical patent/CN105423909A/en
Publication of CN105423909A publication Critical patent/CN105423909A/en
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Abstract

The invention provides profile measuring and data processing methods of non-continuous surfaces of large-scale high-speed revolution equipment, and belongs to the technical field of mechanical assembling measurement. The measuring method is divided into two conditions of unassembled and assembled: in the unassembled condition, measurement can be directly accomplished on a precision rotary table, a measuring surface is mostly a stator inner surface after assembling, and a sensor needs to be installed on a rotor for measurement; according to the data processing method, the non-continuous surfaces are divided into three conditions of small slits, large slits, and grooves according to the width of slits and the diameter ratio of capacitance sensors and then processed, a correction method based on characteristics of the capacitance sensors is proposed according to the abnormal condition of measuring data, and an interpolation method based on a cubic Bezier curve is proposed according to the missing condition of the measuring data. According to the methods, the problem of the measurement of the non-continuous surfaces of the rotor and the stator of the large-scale high-speed revolution equipment is effectively solved, the measuring technology of the large-scale high-speed revolution equipment is improved, and the predictability in an assembling process is guaranteed.

Description

The large high-speed revolution discontinuous surface profile measurement of equipment and data processing method
Technical field
The invention belongs to Automatic manual transmission field of measuring technique, relate generally to a kind of large high-speed revolution discontinuous surface profile measurement of equipment and data processing method.
Background technology
In the process of large high-speed revolution equipment assembling and after assembling, need to carry out a large amount of patterns or clearance measurement to all parts and entirety, wherein there is the situation on many discontinuous surfaces, and traditional measuring method mostly for be the measurement of continuous surface or the measurement of certain special circumstances, the measurement for discontinuous surface does not have versatility.
In traditional measuring method, data processing normally directly adopts consecutive number strong point or mean value to replace the exceptional data point in measuring, or even directly give up, which reduce valid data to count, impact is caused on the precision of whole measurement, processing mode is comparatively single, especially more the or discontinuous part of discontinuous situation is accounted for the measurement cross section of large percentage, is difficult to measure accurately.Simultaneously for the situation of shortage of data, the mean value interpolation of employing or line interpolation method cannot ensure flatness and the continuity of overall pattern, and the data of interpolation also cannot embody real pattern.
Summary of the invention
The object of the invention is for the above-mentioned Problems existing that possesses skills, a kind of large high-speed revolution discontinuous surface profile measurement of equipment and data processing method are proposed, reach the discontinuous surface of Measurement accuracy large high-speed revolution equipment, and the object realized effective process of image data, improve the performance of engine.
The object of the present invention is achieved like this:
A kind of discontinuous surface profile measurement method of large high-speed revolution equipment, is characterized in that:
Turn stator assembling by whether having completed the discontinuous surface measurement of large high-speed revolution equipment be divided into two kinds of situations:
(1), when do not complete turn stator assembling, discontinuous surface measurement method carries out according to the following steps:
1, judge that capacitive transducer is the need of demarcation, is, demarcate, otherwise do not demarcate;
2, to be measured is fixed on precise rotating platform, adjusts benchmark;
3, by measuring staff, capacitive transducer gauge head is directly faced toward tested surface, choose one section of continuous surface, trimmer sensing station makes it enter in range ability;
4, hand rotation turntable, the angle value according to Circular gratings in precise rotating platform carries out equal interval sampling, and sampling number should meet and often encloses 1000 ~ 2000 points;
(2), completed turn stator assembling when, discontinuous surface measurement method carries out according to the following steps:
1, judge that capacitive transducer is the need of demarcation, is, demarcate, otherwise do not demarcate;
2, capacitive transducer gauge head is fixed on rotor, and directly facing to stator tested surface, choose one section of continuous surface, trimmer sensing station makes it enter in range ability;
3, utilize driven by motor rotor turns, the feedback signal according to motor encoder carries out equal interval sampling, and sampling number should meet and often encloses 1000 ~ 2000 points.
The discontinuous surface profile data disposal route of large high-speed revolution equipment, is characterized in that:
According to the width of discontinuous surface gaps and the diameter ratio of capacitive transducer, three kinds of situations are divided into process respectively:
(1), gap width is less than or equal to the small gap of capacitive transducer diameter 1/5, directly replaces with the mean value of previous data point or a rear data point or adjacent 10 ~ 20 data;
(2), gap width is greater than capacitive transducer diameter 1/5, is less than the large gap of capacitive transducer diameter:
Characteristic according to capacitive transducer: if do not consider the edge effect of capacitive transducer, then capacitance c=ε S/d, wherein εfor the specific inductive capacity of medium between pole plate, sfor polar plate area, dfor the distance between pole plate; During normal measurement, εa constant, sbe constant, can capacitance be obtained cwith dinversely proportional relation, can record distance by Detection capacitance value d=ε S/C; For discontinuous surface measurement, in the edge in gap, right opposite amasss sbe change, determine the relative position of gap and capacitive transducer front end according to the angle value of measurement and the position in gap, thus it be long-pending to obtain right opposite svariable quantity Δ S, then correction factor ρ=S/ (S-Δ S), revised distance is ρ d;
(3), gap width is equal to or greater than the groove of capacitive transducer diameter:
There is exceptional data point at slot wedge, utilize the modification method correction measurement data in the situation of above-mentioned large gap; Measurement point in the trench often causes shortage of data beyond the range of capacitive transducer, the method of directly deleting can be adopted for pulsation measurement, other form and position tolerances are measured and then needs completion data, utilize known related data, carry out Cubic kolmogorov's differential system data interpolation by following steps:
1, straight line 1 is simulated by 5 ~ 10 points before missing data: y=k 1 x+b 1 ; Straight line 2 is simulated by 5 ~ 10 points after missing data: y=k 2 x+b 2 ;
2, by the horizontal ordinate of front for missing data 1 point x 0 bring in the equation of straight line 1, obtain starting point p 0 (x 0 , y 0 ); By the horizontal ordinate of 1 point after missing data x 3 bring in the equation of straight line 2, obtain starting point p 3 (x 3 , y 3 );
3, by horizontal ordinate x 1 =(x 3 -x 0 )/3+x 0 bring in the equation of straight line 1, obtain reference mark p 1 (x 1 , y 1 ); By horizontal ordinate x 2 =2 (x 3 -x 0 )/3+x 0 bring in the equation of straight line 2, obtain reference mark p 2 (x 2 , y 2 );
4, by point p 0 (x 0 , y 0 ), p 1 (x 1 , y 1 ), p 2 (x 2 , y 2 )with p 3 (x 3 , y 3 )obtain the parametric form of Cubic kolmogorov's differential system:
B(t)=P 0 (1-t) 3 +3P 1 t(1-t) 2 +3P 2 t 2 (1-t)+P 3 t 3 ,t?[0,1]
The interpolation of missing data is carried out with this equation.
Compared with prior art, feature of the present invention is:
Effectively can complete the measurement on discontinuous surface, by the modification method according to capacitive transducer characteristic and the interpolating method based on Cubic kolmogorov's differential system, add the number of effective points of measurement data, restored the overall pattern of tested surface to the full extent, improve the precision of measurement.
Accompanying drawing explanation
Fig. 1 is small gap instrumentation plan
Fig. 2 is large slot measurement schematic diagram
Fig. 3 is groove instrumentation plan
Fig. 4 is Cubic kolmogorov's differential system interpolation missing data schematic diagram
In figure: 1a-small gap capacitive transducer; 1b-large gap capacitive transducer; 1c-channel capacitor sensor; 2a-small gap measuring surface; 2b-large slot measurement face; 2c-groove measuring surface; 3a-small gap measurement result; 3b-large slot measurement result; 3c-groove measurement result; 4b-large slot measurement specific position; 5b-groove measures specific position; P 0-Cubic kolmogorov's differential system starting point; P 1-Cubic kolmogorov's differential system reference mark 1; P 2-Cubic kolmogorov's differential system reference mark 2; P 3-Cubic kolmogorov's differential system terminal.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
A kind of discontinuous surface profile measurement method of large high-speed revolution equipment,
Turn stator assembling by whether having completed the discontinuous surface measurement of large high-speed revolution equipment be divided into two kinds of situations:
(1), when do not complete turn stator assembling, discontinuous surface measurement method carries out according to the following steps:
1, judge that capacitive transducer is the need of demarcation, is, demarcate, otherwise do not demarcate;
2, to be measured is fixed on precise rotating platform, adjusts benchmark;
3, by measuring staff, capacitive transducer gauge head is directly faced toward tested surface, choose one section of continuous surface, trimmer sensing station makes it enter in range ability;
4, hand rotation turntable, the angle value according to Circular gratings in precise rotating platform carries out equal interval sampling, and sampling number should meet and often encloses 1000 ~ 2000 points;
(2), completed turn stator assembling when, discontinuous surface measurement method carries out according to the following steps:
1, judge that capacitive transducer is the need of demarcation, is, demarcate, otherwise do not demarcate;
2, capacitive transducer gauge head is fixed on rotor, and directly facing to stator tested surface, choose one section of continuous surface, trimmer sensing station makes it enter in range ability;
3, utilize driven by motor rotor turns, the feedback signal according to motor encoder carries out equal interval sampling, and sampling number should meet and often encloses 1000 ~ 2000 points.
The discontinuous surface profile data disposal route of a kind of large high-speed revolution equipment,
According to the width of discontinuous surface gaps and the diameter ratio of capacitive transducer, three kinds of situations are divided into process respectively:
(1), gap width is less than or equal to the small gap of small gap capacitive transducer 1a diameter 1/5, burst pulse shape is rendered as in small gap measurement result 3a, data point is little, less for measurement result impact, can gross error be regarded as, directly replace with the mean value of previous data point or a rear data point or adjacent 10 ~ 20 data;
(2), gap width is greater than large gap capacitive transducer 1b diameter 1/5, is less than the large gap of large gap capacitive transducer 1b diameter, and in large slot measurement 3b result, present quafric curve shape, data point increases, and becomes large for measurement result impact;
Characteristic according to large gap capacitive transducer 1b: if do not consider the edge effect of large gap capacitive transducer 1b, then capacitance c=ε S/d, wherein εfor the specific inductive capacity of medium between pole plate, sfor polar plate area, dfor the distance between pole plate; During normal measurement, εa constant, sbe constant, can capacitance be obtained cwith dinversely proportional relation, can record distance by Detection capacitance value d=ε S/C; For discontinuous surface measurement, in the capacitive transducer 1b measuring process of large gap, can find out that right opposite amasss by large slot measurement specific position 4b sbe change, determine the relative position of gap and capacitive transducer 1b front end, large gap according to the angle value of measurement and the position in gap, thus it be long-pending to obtain right opposite svariable quantity Δ S, then correction factor ρ=S/ (S-Δ S), revised distance is ρ d;
(3), gap width is equal to or greater than the groove of channel capacitor sensor 1c diameter, and in groove measurement result 3c, present trapezoidal shape, data point is more, larger for measurement result impact; In channel capacitor sensor 1c measuring process, measure specific position 4c by groove and can find out that right opposite amasss sbe change and right opposite amasss in the trench is zero, therefore in groove is measured, not only there is exceptional data point but also there is shortage of data;
There is exceptional data point at slot wedge, utilize the modification method correction measurement data in the situation of above-mentioned large gap; Measurement point in the trench often causes shortage of data beyond the range of channel capacitor sensor 1c, the method of directly deleting can be adopted for pulsation measurement, other form and position tolerances are measured and then needs completion data, utilize known related data, carry out Cubic kolmogorov's differential system data interpolation by following steps:
1, straight line 1 is simulated by 5 ~ 10 points before missing data: y=k 1 x+b 1 ; Straight line 2 is simulated by 5 ~ 10 points after missing data: y=k 2 x+b 2 ;
2, by the horizontal ordinate of front for missing data 1 point x 0 bring in the equation of straight line 1, obtain starting point p 0 (x 0 , y 0 ); By the horizontal ordinate of 1 point after missing data x 3 bring in the equation of straight line 2, obtain starting point p 3 (x 3 , y 3 );
3, by horizontal ordinate x 1 =(x 3 -x 0 )/3+x 0 bring in the equation of straight line 1, obtain reference mark p 1 (x 1 , y 1 ); By horizontal ordinate x 2 =2 (x 3 -x 0 )/3+x 0 bring in the equation of straight line 2, obtain reference mark p 2 (x 2 , y 2 );
4, by point p 0 (x 0 , y 0 ), p 1 (x 1 , y 1 ), p 2 (x 2 , y 2 )with p 3 (x 3 , y 3 )obtain the parametric form of Cubic kolmogorov's differential system:
B(t)=P 0 (1-t) 3 +3P 1 t(1-t) 2 +3P 2 t 2 (1-t)+P 3 t 3 ,t?[0,1]
The interpolation of missing data is carried out with this equation.

Claims (2)

1. the discontinuous surface profile measurement method of large high-speed revolution equipment, is characterized in that:
Turn stator assembling by whether having completed the discontinuous surface measurement of large high-speed revolution equipment be divided into two kinds of situations:
(1), when do not complete turn stator assembling, discontinuous surface measurement method carries out according to the following steps:
1, judge that capacitive transducer is the need of demarcation, is, demarcate, otherwise do not demarcate;
2, to be measured is fixed on precise rotating platform, adjusts benchmark;
3, by measuring staff, capacitive transducer gauge head is directly faced toward tested surface, choose one section of continuous surface, trimmer sensing station makes it enter in range ability;
4, hand rotation turntable, the angle value according to Circular gratings in precise rotating platform carries out equal interval sampling, and sampling number should meet and often encloses 1000 ~ 2000 points;
(2), completed turn stator assembling when, discontinuous surface measurement method carries out according to the following steps:
1, judge that capacitive transducer is the need of demarcation, is, demarcate, otherwise do not demarcate;
2, capacitive transducer gauge head is fixed on rotor, and directly facing to stator tested surface, choose one section of continuous surface, trimmer sensing station makes it enter in range ability;
3, utilize driven by motor rotor turns, the feedback signal according to motor encoder carries out equal interval sampling, and sampling number should meet and often encloses 1000 ~ 2000 points.
2. the discontinuous surface profile data disposal route of large high-speed revolution equipment, is characterized in that:
According to the width of discontinuous surface gaps and the diameter ratio of capacitive transducer, three kinds of situations are divided into process respectively:
(1), gap width is less than or equal to the small gap of capacitive transducer diameter 1/5, directly replaces with the mean value of previous data point or a rear data point or adjacent 10 ~ 20 data;
(2), gap width is greater than capacitive transducer diameter 1/5, is less than the large gap of capacitive transducer diameter:
Characteristic according to capacitive transducer: if do not consider the edge effect of capacitive transducer, then capacitance c=ε S/d, wherein εfor the specific inductive capacity of medium between pole plate, sfor polar plate area, dfor the distance between pole plate; During normal measurement, εa constant, sbe constant, can capacitance be obtained cwith dinversely proportional relation, can record distance by Detection capacitance value d=ε S/C; For discontinuous surface measurement, in the edge in gap, right opposite amasss sbe change, determine the relative position of gap and capacitive transducer front end according to the angle value of measurement and the position in gap, thus it be long-pending to obtain right opposite svariable quantity Δ S, then correction factor ρ=S/ (S-Δ S), revised distance is ρ d;
(3), gap width is equal to or greater than the groove of capacitive transducer diameter:
There is exceptional data point at slot wedge, utilize the modification method correction measurement data in the situation of above-mentioned large gap; Measurement point in the trench often causes shortage of data beyond the range of capacitive transducer, the method of directly deleting can be adopted for pulsation measurement, other form and position tolerances are measured and then needs completion data, utilize known related data, carry out Cubic kolmogorov's differential system data interpolation by following steps:
1, straight line 1 is simulated by 5 ~ 10 points before missing data: y=k 1 x+b 1 ; Straight line 2 is simulated by 5 ~ 10 points after missing data: y=k 2 x+b 2 ;
2, by the horizontal ordinate of front for missing data 1 point x 0 bring in the equation of straight line 1, obtain starting point p 0 (x 0 , y 0 ); By the horizontal ordinate of 1 point after missing data x 3 bring in the equation of straight line 2, obtain starting point p 3 (x 3 , y 3 );
3, by horizontal ordinate x 1 =(x 3 -x 0 )/3+x 0 bring in the equation of straight line 1, obtain reference mark p 1 (x 1 , y 1 ); By horizontal ordinate x 2 =2 (x 3 -x 0 )/3+x 0 bring in the equation of straight line 2, obtain reference mark p 2 (x 2 , y 2 );
4, by point p 0 (x 0 , y 0 ), p 1 (x 1 , y 1 ), p 2 (x 2 , y 2 )with p 3 (x 3 , y 3 )obtain the parametric form of Cubic kolmogorov's differential system:
B(t)=P 0 (1-t) 3 +3P 1 t(1-t) 2 +3P 2 t 2 (1-t)+P 3 t 3 ,t?[0,1]
The interpolation of missing data is carried out with this equation.
CN201510664091.3A 2015-10-15 2015-10-15 Profile measuring and data processing methods of non-continuous surfaces of large-scale high-speed revolution equipment Pending CN105423909A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109196301A (en) * 2016-05-13 2019-01-11 安赛乐米塔尔公司 The method for obtaining the height for the material being deposited in coke oven
WO2021035781A1 (en) * 2019-08-27 2021-03-04 大连理工大学 Typical rotational part characterization method based on measured runout data
CN114964042A (en) * 2022-05-20 2022-08-30 西安交通大学 Data abnormal point distinguishing and identifying method in online measurement of curve profile

Citations (5)

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Publication number Priority date Publication date Assignee Title
US5565980A (en) * 1993-05-05 1996-10-15 British Nuclear Fuels Plc Apparatus for the detection of surface defects
US20080187192A1 (en) * 2003-08-26 2008-08-07 Toshishige Shimamura Surface shape recognition sensor device
CN201138196Y (en) * 2007-09-29 2008-10-22 华中科技大学 Measuring apparatus of micro-nano deep groove structure
CN102198453A (en) * 2010-03-23 2011-09-28 宝山钢铁股份有限公司 Method for detecting vibration marks on surface of roller
CN102252600A (en) * 2011-04-18 2011-11-23 长春工业大学 Capacitive transducer-based cylindricity deviation measuring method and device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5565980A (en) * 1993-05-05 1996-10-15 British Nuclear Fuels Plc Apparatus for the detection of surface defects
US20080187192A1 (en) * 2003-08-26 2008-08-07 Toshishige Shimamura Surface shape recognition sensor device
CN201138196Y (en) * 2007-09-29 2008-10-22 华中科技大学 Measuring apparatus of micro-nano deep groove structure
CN102198453A (en) * 2010-03-23 2011-09-28 宝山钢铁股份有限公司 Method for detecting vibration marks on surface of roller
CN102252600A (en) * 2011-04-18 2011-11-23 长春工业大学 Capacitive transducer-based cylindricity deviation measuring method and device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109196301A (en) * 2016-05-13 2019-01-11 安赛乐米塔尔公司 The method for obtaining the height for the material being deposited in coke oven
WO2021035781A1 (en) * 2019-08-27 2021-03-04 大连理工大学 Typical rotational part characterization method based on measured runout data
CN114964042A (en) * 2022-05-20 2022-08-30 西安交通大学 Data abnormal point distinguishing and identifying method in online measurement of curve profile
CN114964042B (en) * 2022-05-20 2023-10-20 西安交通大学 Method for distinguishing and identifying abnormal points in data in curve profile online measurement

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