CN106969696A - Silk thread position indicator, absolute positioning system, absolute fix method and scaling method - Google Patents
Silk thread position indicator, absolute positioning system, absolute fix method and scaling method Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/004—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring coordinates of points
- G01B7/008—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring coordinates of points using coordinate measuring machines
Abstract
This application discloses a kind of silk thread position indicator, absolute positioning system, absolute fix method and scaling method.Silk thread passage is opened up on the silk thread position indicator of the application, including spherical shell, electrode plate groups and pedestal, spherical shell axis；Electrode plate groups by the equal strip electrode plate groups of four block sizes into, four electrode plates are arranged in silk thread passage along silk thread channel direction, four electrode plates are parallel two-by-two and specular is arranged in spherical shell axis up and down, the plane of symmetry of two electrode plates is vertical with the plane of symmetry of two electrode plates of left and right up and down, and the intersection of two planes of symmetry is overlapped with spherical shell axis；Spherical shell is movably installed on pedestal, and spherical shell can be rotated on pedestal along the axis for opening up silk thread passage.The silk thread position indicator of the application, carries out relative positioning to the tinsel for loading radiofrequency signal using four electrode plates, then carries out space coordinate measurement to spherical shell again, determine the absolute position of spherical shell, realize silk thread absolute fix.
Description
Technical field
The application is related to silk thread location equipment field, more particularly to a kind of silk thread position indicator, absolute positioning system, definitely
Localization method and scaling method.
Background technology
Application of the current silk thread in superhigh precision measurement is more and more extensive, but silk thread positioning precision is not improved but.
Because silk thread small, flexible, measurement accuracy can be also influenceed even if small active force, so can not using contact measurement method
Very high measurement accuracy can be obtained；Need to aim at same measurement point, ability during optical gauge such as theodolite, total station survey
Calculating obtains spatial three-dimensional position, is difficult to measure same point for the indiscriminate silk thread of length direction, so can not also obtain
To very high measurement accuracy.
Existing several silk thread location equipments include, and photo-electric position indicator, image-type silk thread position indicator, condenser type silk thread are determined
Position instrument and silk thread displacement monitors.
Wherein, photo-electric position indicator is the linear accelerating of the SLAC (abbreviation SLAC) of famous American
In device coherent source (abbreviation LCLS) project, when using line technology measurement magnetic center position is vibrated, in order to determine silk thread and magnetic
Relation between iron outside reference and design.The position indicator is by the use of laser diode as light source, and four-quadrant PSD is used as sensing
Device；Because the dimension of light source of laser diode is much larger than wire diameter, designer cleverly make use of size to be about that 1/5 silk thread is straight
The slit in footpath carrys out subdivision's signal as optical gate, so as to improve precision.It is relative that slit is obtained using three coordinate measuring machine Accurate Calibration
Position relationship between position indicator outside reference, silk thread absolute fix precision can reach 30 microns.When silk thread is moved, slit must
Silk thread, which must be directed at, to be measured, so measurement is time-consuming, can not enter Mobile state observation.
Image-type silk thread position indicator, mainly the oWPS products using the company of increasing income, as representative, are that the application demand for answering CLIC is opened
Hair.It sets up Binocular vision photogrammetry model, the inner parameter of camera using two miniature CCD/CMOS cameras as sensor
And the structural parameters in model pass through Accurate Calibration.During measurement, after camera internal parameter correction silk thread image coordinate,
The three-dimensional position of silk thread in the visual field is accurately calculated by structural parameters.Accuracy of measurement is up to 10 microns, and precision is up to 5 microns.
But because the limitation of the camera lens depth of field, its measurement range is only 10mm × 10mm.Special silk thread can only be used：Vectran, is measured other
Material silk thread especially wire when, due to the reflective precision that can not be realized silk thread extracted with high accuracy, greatly limit it, also without
Method carries out Absolute position measurement.
Condenser type silk thread position indicator, using the WPS of Fogale companies as representative.Its principle is to become medium capacitance sensor,
When silk thread passes through parallel pole, contrasted between solid dielectric change in dielectric constant can be caused, so that silk thread position to be converted to the change of capacitance
Change.Measurement accuracy can be brought up to 10 microns.But there is no absolute fix benchmark, relative position measurement can only be carried out.
Silk thread displacement monitors are Zhuhongyan etc. in document " Design and simulation of a wire
position monitor for cryogenicsystems in an ADS linac”Chinese Physics
A kind of silk thread location equipment of report in C.Vol.38, No.8 (2014), the position indicator is used to measure equipment in cryostat
Position amount of contraction, mainly for the relative change of device location in device temperature change procedure, relative position measurement precision is reachable
To 30 microns, but without exact external reference, it is impossible to which absolute position is measured.
The content of the invention
The purpose of the application is to provide a kind of improved silk thread position indicator, the silk thread absolute fix based on the silk thread position indicator
The error calibrating method of system, the method that silk thread absolute fix is carried out using the silk thread position indicator, and silk thread absolute fix.
The application employs following technical scheme：
The one side of the application discloses a kind of silk thread position indicator, including spherical shell 11, electrode plate groups and pedestal 13, ball
Silk thread passage is opened up on the axis of shape housing 11, so that silk thread is passed through；Electrode plate groups are by four pieces of independent and equal-sized strips
Shape battery lead plate 121,122,123,124 is constituted, and four electrode plates 121,122,123,124 are arranged on silk thread along silk thread channel direction
In passage, four electrode plates are parallel and specular two-by-two to be arranged in the axis of spherical shell 11 up and down, two pieces up and down
The plane of symmetry of battery lead plate is vertical with the plane of symmetry of two electrode plates of left and right, and the intersection and the axle of spherical shell 11 of two planes of symmetry
Line is overlapped, in use, silk thread passes through the region that four electrode plates are shrouded；Spherical shell 11 is movably installed on pedestal 13, spherical
Housing 11 can be rotated on pedestal 13 along the axis for opening up silk thread passage.
It should be noted that the accuracy in order to ensure measurement, the spherical shell that the application is used is high-precision sphere,
Pedestal is also high-precision, when spherical shell is rotated on pedestal, and the position of spherical shell axis is constant.In one kind realization
In mode, silk thread passage is cylindrical hole, and its axial line is also to be overlapped with the axis of spherical shell, can so be facilitated
And ensure the accurate installation of four electrode plates.
It should also be noted that, the silk thread position indicator of the application, maximum difference is with existing silk thread position indicator, this
The silk thread position indicator of application is in use, be that radiofrequency signal is loaded on tinsel, when the tinsel of loading radiofrequency signal is leaned on
During nearly battery lead plate, image charge can be produced on battery lead plate, the quantity of electric charge is relevant with the distance between wire and electrode, using relative
Two battery lead plates placed, then can obtain tinsel and two battery lead plates be symmetrical with the signal of two battery lead plates of integrated treatment
The distance of center line.The application utilizes four electrode plates, then can obtain tinsel relative to battery lead plate symmetrical center line
Two-dimensional coordinate, realizes relative positioning.In conjunction with the absolute fix of spherical shell in itself, then the definitely fixed of tinsel can be realized
Position.Need exist for explaining, the absolute fix of spherical shell can be using conventional space coordinates measuring apparatus, and this will be rear
Explanation in continuous scheme；Spherical shell absolute fix is actually to carry out absolute fix to the axis of spherical shell, and in this Shen
In silk thread position indicator design please, battery lead plate symmetrical center line is overlapped with the axis of spherical shell, therefore, tinsel phase
The absolute fix of spherical shell axis is added for the relative positioning of battery lead plate symmetrical center line, it is possible to realize tinsel
Absolute fix.But, when installing battery lead plate, it is difficult to ensure that the symmetrical center line and the axis weight of spherical shell of four electrode plates
Close, therefore, present applicant proposes the silk thread position indicator based on the application, error calibrating method, this is also by follow-up scheme
It is middle to describe in detail.
It is preferred that, the outer surface of spherical shell 11 offers 12 V-grooves, and two reference planes of each V-groove are mutual
Vertically；In four electrode plates 121,122,123,124, the two ends per electrode plate offer a V-groove, altogether eight V
In type groove, this eight V-grooves, the bearing of trend of V-groove is vertical with the length direction of respective electrode plate, V-groove one of them
Reference plane is parallel with respective electrode plate, V-groove axle along spherical shell 11 of four electrode plates 121,122,123,124 with one end
Line is symmetrical arranged, and the V-groove specular at two ends is set；The bearing of trend of four additional V-groove and the axis of spherical shell 11
It is parallel, axisymmetrical of four V-grooves along spherical shell 11 and the outer most edge for being uniformly arranged at spherical shell 11, also, V-type
Groove is arranged between two pieces of adjacent battery lead plates, and adjacent with two pieces battery lead plate is parallel respectively for two reference planes of V-groove.
Wherein, the outer most edge of spherical shell 11 is the outer most edge for the axis of spherical shell 11.
It should be noted that the effect of adjustment benchmark, on the one hand, be battery lead plate installation for convenience, to ensure battery lead plate
The accuracy of installation；On the other hand, the position of spherical shell can be adjusted by adjusting benchmark.It is appreciated that the silk of the application
In line position indicator, spherical shell is rotated along axis, still, is fixed in other orientation；When silk thread is measured, have
When need the posture to silk thread position indicator, i.e., axis rotate beyond other directions, be finely adjusted, so that silk thread is put down with battery lead plate
OK, it is therefore desirable to adjust the posture that benchmark changes spherical shell.It should be noted that adjustment benchmark is the whole spherical shell of regulation
With the posture of battery lead plate, make silk thread parallel with battery lead plate；Battery lead plate is to be fixedly mounted in itself with spherical shell, four pieces of electrodes
Plate is after adjustment and installation is good, and position is changeless.
It should also be noted that, in 12 V-grooves, the V-groove at battery lead plate two ends is except can be as reference for installation, side
Just beyond battery lead plate is installed, be also used as yaw angle adjustment benchmark, and four with the V-type of the diameter parallel of spherical shell 11
Groove, then as horizontal adjustment benchmark, adjustment roll angle and the angle of pitch.In addition, precision of the spherical shell of the application itself is very high, can
Direct measurement sphere space position, is used as space mounting benchmark.
It is preferred that, on spherical shell 11, at two openings of silk thread passage 14, it is respectively designed with high accuracy photogrammetric
Reflecting optics 151,152,153,154.
It should be noted that the effect of the photogrammetric reflector space of high accuracy is to coordinate contactless photogrammetric side
Method carries out absolute fix to spherical shell and designed, it will be understood that if the positioning of spherical shell uses other manner, for example
Three coordinate measuring machine, tracker etc., then can be without the photogrammetric reflector space of high accuracy.
The another side of the application discloses a kind of silk thread absolute positioning system, including three coordinate measuring machine and the silk of the application
Line position indicator；Silk thread position indicator 1 is fixedly mounted on the six degree of freedom platform 21 of three coordinate measuring machine, in three coordinate measuring machine
On objective table 22, erect respectively positioned at the both sides of silk thread position indicator 1 and silk thread supporting mechanism 23,24 is installed；In use, silk thread 3 is passed through
Silk thread position indicator 1 is passed through by silk thread supporting mechanism 23,24.
It should be noted that as previously mentioned, the silk thread position indicator of the application can carry out relative positioning to silk thread, then
With reference to the absolute fix of space coordinate of silk thread position indicator itself, you can to realize the absolute fix of silk thread；And one kind of the application
In implementation, what silk thread absolute positioning system was used is exactly that three coordinate measuring machine carries out space orientation to silk thread position indicator.Can
To understand, except three coordinate measuring machine, can also herein it be not specifically limited using other space coordinates measuring apparatus.
The application's simultaneously also discloses a kind of silk thread absolute fix method again, including is positioned using the silk thread of the application
Instrument, carries out positioning measurement to tinsel in accordance with the following methods：
The position of silk thread position indicator is adjusted, it is parallel with battery lead plate when making tinsel through silk thread position indicator；
The electric current in radiofrequency signal, four electrode plates 121,122,123,124 of measurement is loaded on tinsel, with spherical
Centered on the axis of housing 11, two electrode plate directions of definition left and right are X-axis, and two electrode plate directions are Y-axis up and down, according to public affairs
Formula one and formula two, obtain position of the tinsel relative to the axis of spherical shell 11；
Formula one：
Formula two：
Wherein, DXFor the off-centered normalized cumulant of silk thread horizontal direction, DYFor the off-centered normalization of vertical direction
Distance, IbAnd IdThe electric current that two electrode plates are measured respectively on X axis, IaAnd IcTwo electrode plates are measured respectively in Y-axis
Electric current, x be the distance of the horizontal axis for being upwardly deviated from spherical shell 11 of tinsel, y be tinsel it is perpendicular be upwardly deviated from it is spherical
The distance of the axis of housing 11, b are that the distance of the axis of battery lead plate and spherical shell 11, Φ are battery lead plate relative to spherical shell
The subtended angle of 11 axis；
The absolute position of spherical shell 11 is measured using space coordinates measuring apparatus, according to the absolute position of spherical shell 11
Put, and tinsel calculates the absolute position of tinsel, realizes tinsel relative to the position of the axis of spherical shell 11
Absolute fix.
It is preferred that, space coordinates measuring apparatus is three coordinate measuring machine, tracker or the photogrammetric position indicator of high accuracy.
The application's simultaneously also discloses a kind of error calibrating method of silk thread position indicator again, is determined using the silk thread of the application
Position instrument, carries out error calibration to silk thread position indicator in accordance with the following methods：
1) position indicator posture is adjusted, makes electrode parallel with tinsel, upper/lower electrode is parallel with objective table, position indicator reading
x1、y1；
2) wire locations are constant, and position indicator is rotated into 180 degree, position indicator reading x2, y2；
X1=rx+ Δ x, y1=ry+ Δ y, after rotation 180 degree, x2=rx- Δ x, y2=ry-Δy；Reading subtracts each other twice
It can obtain Δ x=(x1-x2)/2, Δ y=(y1-y2)/2；
Wherein, rxFor silk thread and the distance in spherical shell axis horizontal direction, ryFor silk thread and spherical shell axis vertical side
To distance, x1, y1 and x2, y2 are that the silk thread that measures twice of silk thread position indicator is sat relative to the two dimension of battery lead plate symmetrical center line
Mark, Δ x is the lateral deviation of battery lead plate symmetrical center line and spherical shell axis, Δ y be battery lead plate symmetrical center line with it is spherical
The vertical deviation of housing axis.
It should be noted that adjustment position indicator posture, in a kind of implementation of the application, mainly by adjusting base
What quasi- V-groove was carried out；And the three-dimensional coordinate of spherical shell or position indicator in itself is then by miscellaneous equipment, such as amesdial, water
Level or space coordinates measuring apparatus measuring basis position, obtain the difference with required position, then by six degree of freedom platform
Corresponding adjust automatically is carried out according to the difference measured.In addition, electrode is parallel with tinsel, the parallel of silk thread is mainly ensured
Degree, the horizontal parallel of silk thread is adjusted by the supporting mechanism at silk thread two ends, and the parallel of battery lead plate is in assembling
Time directly ensures its depth of parallelism.In the error calibrating method of the application, silk thread, can without being placed directly in the plane of symmetry of electrode
To judge the position of silk thread using current signal, electrode symmetrical centre is moved it into up.Because there is rigging error, electrode
Symmetrical centre may be misaligned with the centre of sphere, and error calibrating method is exactly to measure this deviation.
The beneficial effect of the application is：
The silk thread position indicator of the application, four electrode plates are arranged in high-precision spherical shell, four pieces of electrodes are utilized
Plate carries out relative positioning to the tinsel for loading radiofrequency signal, then carries out space coordinate measurement to spherical shell again, it is determined that
The absolute position of spherical shell, and then realize silk thread absolute fix.The silk thread position indicator of the application provides one for silk thread positioning
The new accurate absolute pointing device of measurement is planted, also, it is easy to use, it is easy to operate.
Brief description of the drawings
Fig. 1 is the structural representation of silk thread position indicator in the embodiment of the present application；
Fig. 2 is the side structure schematic diagram of silk thread position indicator spherical shell in the embodiment of the present application；
Fig. 3 is structural representation of the silk thread position indicator spherical shell along silk thread passage section view in the embodiment of the present application；
Fig. 4 is the structural representation of silk thread absolute positioning system in the embodiment of the present application；
Fig. 5 is the principle analysis figure of silk thread position indicator progress silk thread position measurement in the embodiment of the present application；
Fig. 6 is error calibration analysis chart when silk thread position indicator carries out silk thread position measurement in the embodiment of the present application.
Embodiment
The silk thread position indicator of the application, four electrode plates is arranged on silk thread passage, paralleloscope picture is symmetrical arranged two-by-two
In spherical shell axis up and down, the measured zone of the region that four electrode plates are surrounded, actually silk thread positioning；Four
The axial line of electrode plate is overlapped with spherical shell axis, is absolute fix for convenience；Four electrode plates can measure wire vent
Line realizes relative positioning relative to the position of four electrode plate axial lines, and to carry out absolute fix, then needs to measure spherical shell
The space coordinate of body, that is, obtain the positioning of spherical shell axis, is overlapped in spherical shell axis in four electrode plate axial lines
In the case of, the absolute spatial position of the space orientation namely four electrode plate axial lines of spherical shell axis, along with silk thread
Relative to the position of four electrode plate axial lines, that is, the absolute spatial position of silk thread is obtained, realize silk thread absolute fix.
The silk thread position indicator of the application, when in use, radiofrequency signal is loaded to silk thread, when silk thread is close to battery lead plate, electricity
Image charge can be produced on pole plate, the quantity of electric charge is relevant with the distance between wire and electrode, but without directionality and right and wrong
Linear；If using two battery lead plates staggered relatively, silk thread and two can be obtained with the signal of two battery lead plates of integrated treatment
The distance of individual battery lead plate symmetrical center line, and have the larger range of linearity.Therefore, in the silk thread position indicator of the application, left and right is right
The battery lead plate of title, can orient the position of silk thread in the X-axis；And battery lead plate symmetrical above and below, then it can orient silk thread
Position in Y-axis；Four electrode plates can orient distance of the silk thread relative to battery lead plate symmetrical center line.It should be noted
, in silk thread positioning measurement, it is necessary to first adjust posture or the position of silk thread position indicator, make silk thread parallel with battery lead plate, i.e.,
Ensure that silk thread is consistent in the depth of silk thread passage, can be only used for two-dimensional coordinate demarcation silk thread symmetrical relative to battery lead plate
The distance of center line.
The application is described in further detail below by specific embodiment.Following examples only are entered to advance to the application
One step illustrates, should not be construed as the limitation to the application.
Embodiment
The silk thread position indicator of this example, as shown in Figure 1 to Figure 3, including spherical shell 11, electrode plate groups and pedestal 13, it is spherical
Silk thread passage is opened up on the axis of housing 11, so that silk thread is passed through；Electrode plate groups are by four pieces of independent and equal-sized strips
Battery lead plate 121,122,123,124 is constituted, and four electrode plates 121,122,123,124 are logical installed in silk thread along silk thread channel direction
In road, four electrode plates are parallel and specular two-by-two to be arranged in the axis of spherical shell 11 up and down, up and down two blocks of electricity
The plane of symmetry of pole plate is vertical with the plane of symmetry of two electrode plates of left and right, and the intersection and the axis of spherical shell 11 of two planes of symmetry
Overlap, in use, silk thread passes through the region that four electrode plates are shrouded；Spherical shell 11 is movably installed on pedestal 13, spherical shell
Body 11 can be rotated on pedestal 13 along the axis for opening up silk thread passage.The spherical shell 11 and pedestal 13 of this example are all high accuracy
Processing, when spherical shell 11 is rotated on pedestal 13, the locus of axis is to maintain constant.In addition, spherical in order to adjust
The posture of housing, and also to which battery lead plate is accurately installed, adjustment benchmark is devised on the spherical shell 11 of this example, passes through adjustment
Benchmark, thus it is possible to vary the posture of spherical shell, makes silk thread and battery lead plate keeping parallelism.And photogrammetric survey method is used for convenience
Space orientation is carried out to spherical shell, this example at two openings of silk thread passage 14, is respectively designed with spherical shell 11
The photogrammetric reflecting marking 151,152,153,154 of high accuracy, as shown in Fig. 2 Fig. 2 illustrate only at one of opening
At four reflecting markings, another opening reflecting optics are also equipped with corresponding position.
The silk thread position indicator of this example, in use, tinsel passes through silk thread passage parallel to battery lead plate, and in wire
Radiofrequency signal is loaded on line；The positioning principle of silk thread position indicator is that the tinsel of loading radiofrequency signal can be produced on battery lead plate
Raw image charge, the amount of image charge is related with the distance of battery lead plate to tinsel, therefore, as shown in figure 5, defining four blocks of electricity
The symmetrical center line of pole plate is starting point, and power-on and power-off pole plate is Y-axis, and left and right battery lead plate is X-axis, by detecting in four electrode plates
Electric current, it is possible to know position of the tinsel relative to battery lead plate symmetrical center line.
Calculation formula is as follows：
Formula one：
Formula two：
Wherein, DXFor the off-centered normalized cumulant of silk thread horizontal direction, DYFor the off-centered normalization of vertical direction
Distance, IbAnd IdThe electric current that two electrode plates are measured respectively on X axis, IaAnd IcTwo electrode plates are measured respectively in Y-axis
Electric current, x be the distance of the horizontal axis for being upwardly deviated from spherical shell 11 of tinsel, y be tinsel it is perpendicular be upwardly deviated from it is spherical
The distance of the axis of housing 11, b are that the distance of the axis of battery lead plate and spherical shell 11, Φ are battery lead plate relative to spherical shell
The subtended angle of 11 axis.This example is specifically using the MX-BPM boards processing sensor current signal of Bergoz companies, and use Beijing
The USB7648b analog-to-digital conversion cards that wound is ground by middle Thailand are acquired.
This example is in order to easy to use, and the readout equipment of silk thread position indicator, and will be with directly with current detecting equipment connection
Upper formula one and formula two are programmed into software program, and therefore, silk thread position indicator can directly give the x of tinsel, y-coordinate
Information, the coordinate is position coordinates of the tinsel relative to battery lead plate symmetrical center line.
Silk thread position indicator based on this example, this example further provides a silk thread absolute positioning system, in fact, being exactly
Utilization space coordinate measurment instrument carries out absolute fix to the space coordinate of spherical shell 11, and this example specifically uses three coordinates
Measuring machine.As shown in figure 4, the silk thread absolute positioning system of this example, including three coordinate measuring machine and the silk thread position indicator of this example；Silk
Line position indicator 1 is fixedly mounted on the six degree of freedom platform 21 of three coordinate measuring machine, on the objective table 22 of three coordinate measuring machine,
Erect respectively positioned at the both sides of silk thread position indicator 1 and silk thread supporting mechanism 23,24 is installed；In use, silk thread 3 supports machine via silk thread
Structure 23,24 passes through silk thread position indicator 1.This example specifically uses Hai Kesikang Global three coordinate measuring machines；Three-dimensional coordinates measurement
Other building blocks of machine are identical with general three coordinate measuring machine, do not tire out state herein.
In use, orienting the position relative to battery lead plate symmetrical center line of tinsel by the silk thread position indicator of this example
Put, then go out the space coordinate of spherical shell axis by three coordinate measuring engine measurement again, according to the design of silk thread position indicator, reason
Overlapped by electric pole plate symmetrical center line with spherical shell axis, therefore, the spherical shell axle of three coordinate measuring engine measurement
The space coordinate of line, is exactly the space coordinate of battery lead plate symmetrical center line in theory, the coordinate plus tinsel relative to
The position coordinates of battery lead plate symmetrical center line, you can obtain the absolute coordinate space of tinsel, realizes the absolute of tinsel
Positioning.
But, it is contemplated that alignment error, battery lead plate symmetrical center line and spherical shell axis are simultaneously completely superposed, because
This, this example provides a kind of error calibrating method of silk thread absolute fix.Calibrating platform is used, this example based on three coordinates
The silk thread absolute positioning system of measuring machine.
1) first adjust silk thread position indicator posture, make battery lead plate parallel with tinsel, rotary spherical housing, make above and below
Battery lead plate is parallel with objective table, and left and right battery lead plate is vertical with objective table, and adjusts six degree of freedom platform, makes tinsel above and below
On the plane of symmetry of battery lead plate, silk thread position indicator reading x1, now longitudinal direction y=0, the space bit of three coordinate measuring engine measurement position indicator
Put S1；
2) tinsel position is constant, and the spherical shell of silk thread position indicator rotated into 180 degree, silk thread position indicator reading x2,
The locus S2 of three coordinate measuring engine measurement position indicator.
Define the distance that r is silk thread and spherical shell axis, and x1 and the x2 silk thread that to be silk thread position indicator measure twice with
The distance of battery lead plate symmetrical center line, Δ x is battery lead plate symmetrical center line and the lateral deviation of spherical shell axis, such as Fig. 6 institutes
Show, then x1=r+ Δs x, x2=r- Δ x, reading, which subtracts each other, twice can obtain Δ x=(x1-x2)/2.Calculate battery lead plate symmetrical
The lateral deviation of center line and spherical shell axis.Two figures of Fig. 6 or so are respectively x1 instrumentation plan and spherical shell rotation
X2 instrumentation plan after turnback.
Tinsel can be moved in parallel, is obtained after different x1 measured values, and corresponding spherical shell rotation 180 degree
The x2 measured values of measurement, repeatedly measurement, obtains more accurate Δ x values.
The measuring method of longitudinal bias is similar：
1) first adjust silk thread position indicator posture, make battery lead plate parallel with tinsel, rotary spherical housing, make above and below
Battery lead plate is parallel with objective table, and left and right battery lead plate is vertical with objective table, and adjusts six degree of freedom platform, makes tinsel in left and right
On the plane of symmetry of battery lead plate, silk thread position indicator reading y1, now transverse direction x=0, the space bit of three coordinate measuring engine measurement position indicator
Put；
2) tinsel position is constant, and the spherical shell of silk thread position indicator rotated into 180 degree, silk thread position indicator reading y2,
The locus of three coordinate measuring engine measurement position indicator.
Define the distance that r is silk thread and spherical shell axis, and y1 and the y2 silk thread that to be silk thread position indicator measure twice with
The distance of battery lead plate symmetrical center line, Δ y is the lateral deviation of battery lead plate symmetrical center line and spherical shell axis, then y1=r+
Δ y, y2=r- Δ y, reading, which subtracts each other, twice can obtain Δ y=(y1-y2)/2.Calculate battery lead plate symmetrical center line with it is spherical
The longitudinal bias of housing axis.
The y2 measured after y1 and corresponding spherical shell rotation 180 degree equally can be repeatedly measured, obtains more accurate
Δ y values.
Or, on the plane of symmetry of the silk thread without adjusting battery lead plate, by measuring x1, y1 of first time, and rotation 180 degree
X2, y2 afterwards, subtract each other again by preceding method x twice or y, calculate Δ x values and Δ y values.
Specifically, the silk thread position indicator of this example, x=7.4 microns of its Δ, y=6.6 microns of Δ.
The silk thread position indicator of this example, can carry out relative positioning to tinsel, can also carry out absolute fix.Wherein, phase
Measurement accuracy to positioning is 5 microns, and the degree of accuracy is 5 microns.The measurement accuracy of absolute fix and the degree of accuracy are fixed depending on silk thread
The precision of position instrument and the space coordinates measuring apparatus used, this example are specifically carried out exhausted using three coordinate measuring machine to silk thread
To positioning, measurement accuracy is 6 microns, and the degree of accuracy is 6 microns.
Above content is to combine the further description that specific embodiment is made to the application, it is impossible to assert this Shen
Specific implementation please is confined to these explanations.For the application person of an ordinary skill in the technical field, do not taking off
On the premise of from the application design, some simple deduction or replace can also be made, the protection of the application should be all considered as belonging to
Scope.
Claims (7)
1. a kind of silk thread position indicator, it is characterised in that：Including spherical shell (11), electrode plate groups and pedestal (13), spherical shell
(11) silk thread passage (14) is opened up on axis, so that silk thread is passed through；
The electrode plate groups are made up of four pieces of independent and equal-sized strip battery lead plates (121,122,123,124), four pieces
Battery lead plate (121,122,123,124) is arranged in silk thread passage along silk thread channel direction, and four electrode plates are parallel two-by-two and mirror
Picture is symmetrically arranged in spherical shell (11) axis up and down, up and down two pieces of electrodes of the plane of symmetry of two electrode plates and left and right
The plane of symmetry of plate is vertical, and the intersection of two planes of symmetry is overlapped with spherical shell (11) axis, in use, silk thread passes through four pieces
The region that battery lead plate shrouds；
The spherical shell (11) is movably installed on the pedestal (13), and spherical shell (11) can be along opening on pedestal (13)
If the axis of silk thread passage is rotated.
2. silk thread position indicator according to claim 1, it is characterised in that：The outer surface of the spherical shell (11) is offered
12 V-grooves are mutually perpendicular to as adjustment benchmark, two reference planes of each V-groove；
In four electrode plates (121,122,123,124), the two ends per electrode plate offer a V-groove, also, V-type
The bearing of trend of groove is vertical with the length direction of respective electrode plate, and one of reference plane of V-groove is parallel with respective electrode plate,
Four electrode plates (121,122,123,124) are set with the axisymmetrical of the V-groove along spherical shell (11) of one end, the V at two ends
Type groove specular is set；
The bearing of trend of four additional V-groove and the diameter parallel of spherical shell (11), four V-grooves are along spherical shell (11)
Axisymmetrical and the outer most edge for being uniformly arranged at spherical shell (11), also, V-groove be arranged at two pieces of adjacent battery lead plates it
Between, adjacent with two pieces battery lead plate is parallel respectively for two reference planes of V-groove.
3. silk thread position indicator according to claim 1, it is characterised in that：On the spherical shell (11), in silk thread passage
(14) at two openings, the photogrammetric reflecting optics (151,152,153,154) of high accuracy are respectively designed with.
4. a kind of silk thread absolute positioning system, it is characterised in that：Including described in three coordinate measuring machine and claim any one of 1-3
Silk thread position indicator；Silk thread position indicator (1) is fixedly mounted on the six degree of freedom platform (21) of three coordinate measuring machine, in three coordinates
On the objective table (22) of measuring machine, erect respectively positioned at silk thread position indicator (1) both sides and silk thread supporting mechanism (23,24) is installed；
In use, silk thread (3) passes through silk thread position indicator (1) via silk thread supporting mechanism (23,24).
5. a kind of silk thread absolute fix method, it is characterised in that：Including using the silk thread positioning described in claim any one of 1-3
Instrument, carries out positioning measurement to tinsel in accordance with the following methods,
The position of silk thread position indicator is adjusted, it is parallel with battery lead plate when making tinsel through silk thread position indicator；
The electric current in radiofrequency signal, four electrode plates of measurement (121,122,123,124) is loaded on tinsel, with spherical shell
Centered on the axis of body (11), two electrode plate directions of definition left and right are X-axis, and two electrode plate directions are Y-axis up and down, according to public affairs
Formula one and formula two, obtain position of the tinsel relative to the spherical shell (11) axis；
Formula one：
Formula two：
Wherein, DXFor the off-centered normalized cumulant of silk thread horizontal direction, DYFor vertical direction it is off-centered normalization away from
From IbAnd IdThe electric current that two electrode plates are measured respectively on X axis, IaAnd IcTwo electrode plates are measured respectively in Y-axis
Electric current, x be the distance of the horizontal axis for being upwardly deviated from spherical shell (11) of tinsel, y be tinsel it is perpendicular be upwardly deviated from it is spherical
The distance of the axis of housing (11), b are that the distance of the axis of battery lead plate and spherical shell (11), Φ are battery lead plate relative to spherical
The subtended angle of the axis of housing (11)；
The absolute position of spherical shell (11) is measured using space coordinates measuring apparatus, according to the absolute position of spherical shell (11)
Put, and tinsel calculates the absolute position of tinsel, realizes metal relative to the position of the spherical shell (11) axis
The absolute fix of silk thread.
6. absolute fix method according to claim 5, it is characterised in that：The space coordinates measuring apparatus is three coordinates
Measuring machine, tracker or the photogrammetric position indicator of high accuracy.
7. a kind of error calibrating method of silk thread position indicator, it is characterised in that：Using the silk thread described in claim any one of 1-3
Position indicator, carries out error calibration to silk thread position indicator in accordance with the following methods,
1) position indicator posture is adjusted, makes electrode parallel with tinsel, upper/lower electrode is parallel with objective table, position indicator reading x1,
y1；
2) wire locations are constant, and position indicator is rotated into 180 degree, position indicator reading x2, y2；
X1=rx+ Δ x, y1=ry+ Δ y, after rotation 180 degree, x2=rx- Δ x, y2=ry-Δy；Reading, which subtracts each other, twice to obtain
To Δ x=(x1-x2)/2, Δ y=(y1-y2)/2；
Wherein, rxFor silk thread and the distance in spherical shell axis horizontal direction, ryFor silk thread and spherical shell axis vertical direction
Distance, x1, y1 and x2, y2 are two-dimensional coordinate of the silk thread relative to battery lead plate symmetrical center line that silk thread position indicator is measured twice,
Δ x is battery lead plate symmetrical center line and the lateral deviation of spherical shell axis, and Δ y is battery lead plate symmetrical center line and spherical shell
The vertical deviation of axis.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108203A (en) * | 2019-04-11 | 2019-08-09 | 东莞中子科学中心 | A kind of silk thread location measurement method and system based on photogrammetric technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123404A (en) * | 1994-11-10 | 1996-05-29 | 霍斯特塞德尔两合公司 | Method and device for determining the respective geometrical position of a body |
| WO1998017966A1 (en) * | 1996-10-17 | 1998-04-30 | Philips Electronics N.V. | Device for indicating a position |
| US20080315866A1 (en) * | 2007-06-20 | 2008-12-25 | Pg Drives Technology Ltd. | Control system |
| CN103604359A (en) * | 2013-11-26 | 2014-02-26 | 北京金自能源科技发展有限公司 | Relative-position detection method of band-like material |
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2017
- 2017-03-28 CN CN201710193428.6A patent/CN106969696B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123404A (en) * | 1994-11-10 | 1996-05-29 | 霍斯特塞德尔两合公司 | Method and device for determining the respective geometrical position of a body |
| WO1998017966A1 (en) * | 1996-10-17 | 1998-04-30 | Philips Electronics N.V. | Device for indicating a position |
| US20080315866A1 (en) * | 2007-06-20 | 2008-12-25 | Pg Drives Technology Ltd. | Control system |
| CN103604359A (en) * | 2013-11-26 | 2014-02-26 | 北京金自能源科技发展有限公司 | Relative-position detection method of band-like material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108203A (en) * | 2019-04-11 | 2019-08-09 | 东莞中子科学中心 | A kind of silk thread location measurement method and system based on photogrammetric technology |
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