Device for controlling the surface shape
(57) Abstract:The invention relates to techniques for measuring variations of the shape and radius of curvature of complex surfaces and, in particular, to devices for automatic measurement of the shape of the parabolic microwave antennas-range contactless method. The aim of the invention is to increase the measurement accuracy, noise immunity, the extension of the measuring range and resolution enhancement when the control deviation of the profile is controlled from the reference antenna. The device contains a laser, modulator, the intensity of the laser beam generator sweep generator linearly varying voltage sweep generator, collimator actuators for the control of optical gain, aryabhatta actuators control the focal length, the deflection of the laser beam, driven from the drive of the receiver, mixer, delay, hits, inverter, digital speed meter, digital unit, an information controller, digital to analog converters. 4 Il. The invention relates to a measurement technique, namely the measurement of form deviations and the radius of curvature of complex surfaces, and, in particular, to devices automatically eusto is designed to control the shape of mirror antennas in the form of paraboloids of rotation and a parabolic cylinder.The closest technical solution in its essence and the achieved effect is the device  the Known device comprises an optical sensor (laser), the mechanism of the rotation angle of the laser with two degrees of freedom, the drive mechanism for three-dimensional movement of the laser, the controller, the controller to control movement. In this unit amplitude principle of control of the surface shape of the reflection from her laser beam.However, the known device has insufficient accuracy, noise and the measurement range of the profile deviations. This is due to the nature of the amplitude method. The level, composition and range information of the optical signal in the prototype depends on the stability of the laser, an external optical interference, the accuracy of setting of the optical sensor, the field distribution in the cross section of the laser beam. These fluctuations may be considered, involving statistical and correlation principles for the detection and measurement of the signal.The aim of the invention is to improve the accuracy and noise immunity, the extension of the measuring range deviation of the profile and increase the spatial resolution of the position deviations of the profile paraboli the spatial displacement of the laser beam, the photodetector, the processor and controller for motion control, the following functional units:
the modulator (M) the intensity of the laser (L) of the beam, an electrical input connected to the output of the generator sweep (GCC), the input specified GCC connected to the output of the ramp generator voltage (CLAYS), and the entrance of CLAYS is connected to the output of the sweep generator (G); standard parabolic antenna (EA), installed coaxially with controlled antenna (KA) and facing concave surface to the concave surface of the SPACECRAFT; between M and the axial hole in the AC series and coaxially installed first collimator with controllable optical amplification using the drive movement of the movable elements of the afocal attachment lens and the first lens with controllable focal length with a drive moving parts of the optical system, so that the size of the focal spot on the surface of the SPACECRAFT is kept constant for any coordinates of the surface of the SPACECRAFT; laser beam deflectors placed in the tricks of the AC and EA and synchronously driven in two orthogonal planes from the shared drive; between the axial hole in the EA and the photodetector sequentially and coaxially ustasha optical system and the second collimator with controllable optical amplification using the drive movement of the movable elements of the afocal attachment lens; the photodetector, the output of which is connected to the first input of the mixer, the second input of the mixer is connected through the delay line to the output GCC, and the output of the mixer is connected to the first input of the differential overlap (SS), the second input of the SS is connected through an inverter to the output of the GR; digital speed meter (ICH), an information input connected to the output of the SS, and the entrance gate with inverter output; a digital processor (WED) to calculate the variance and the polar radius profile AC, input data bus which is connected to the output of the ICH, and its control input connected to the output of the inverter; information controller (IR) to form a digital code control commands spatial position of the laser beam, the optical gain of the collimators and the focal length of aryabhatta, the output data bus which is connected to respective actuators through digital to analog converters (DAC), the control input IR is connected to the output of GR and bus external synchronization.The basis of operation of the proposed device is put frequency principle of measuring the differential time delay between the laser beam intensity modulated frequency modulated signal (FM), passed between CA and EA, and those who Preobrazhenka in the mixer in the difference frequency between the modulation frequency of the detainee in LA and modulation frequency of the measuring laser beam. This difference frequency is linearly related to the local deviation of the profile KA from EA. Further, this frequency is converted into a digital code ICH and is fed to the input of the digital processor (CF), calculates the deviation profile in the local surface point KA. To control the laser beam between the AC and EA in their tricks posted by two-dimensional deflection. For the permanence of the spot size of the laser beam on the surface of the SPACECRAFT between the optical modulator and the axial hole in KA coaxially and sequentially placed collimator with controllable optical gain and a zoom lens with controllable focal length, and for the permanence of the size of the receptor spots between the axial hole in the EA and the photodetector coaxially and sequentially placed zoom lens with controllable focal length and a collimator with a controlled optical amplification.Control signals for the actuators of the deflectors, collimators and aryabhatta forms at the given coordinate (X, Y KA information controller (IR), the output data bus which is connected to the actuators through the corresponding DAC and the input of an external control IR is connected to the input of GR.The frequency principle allows a higher t is ka spot of the measuring beam on the SPACECRAFT and the receptor spots on EA can significantly increase the noise immunity, to increase the spatial resolution of the position deviation on the surface of the AC.In Fig. 1 presents a diagram of the device with block opto-electronic processing of information signals; Fig. 2 shows the calculated geometric diagram of a paraboloid of rotation; Fig. 3 illustrates the course of the rays when reflected from deformed parabolic surface; Fig. 4 shows timing diagrams of the control and information signals in the block opto-electronic processing.The device (Fig. 1) to control the shape of the parabolic antenna includes a laser 1, a modulator (M) 2 the intensity of the laser beam, electric entrance of this M connection with the generator output oscillating frequency (GCC) 3, input specified GCC connected to the output of CLAYS 4, and CLAY connected to the output of the sweep generator (G), in the course of the laser beam sequentially and coaxially mounted collimator 6 with the drive (PR-1) 7 control of the optical gain and the lens 8 with the drive (PR-2) 9 control focal length. Measuring the laser beam passes through the axial hole of the controlled antenna (KA) on the reflector of the two-dimensional deflector 10, placed in the focus of the parabolic KA 11; coaxially with AC and with facing concave surface to wny reflective deflector 13. These deflectors are operated by actuator (PR-3) 14 in two orthogonal planes; respectively in the plane XOZ-driven PR-3, in the plane YOZ-driven PR-3U; between the axial hole in the EA and the photodetector in series along the laser beam and coaxially installed the zoom lens 15 to the actuator (PR-4) 16 control the focal length and the collimator 17 with the drive (PR-5) 18 control optical amplification; the photodetector 19, the output of which is connected to the first input of the mixer 20, the second input of the mixer is connected via line 21 to delay the output GCC, and the output of the mixer is connected to the first input of the differential overlap (SS) 22, the second input of the SS is connected through an inverter 23 to the output of the GR; digital speed meter (ICH) 24, an information input connected to the output of the SS, and the entrance gate with inverter output; a digital processor (WED) 25 to calculate the deflection profile of the mirror along the normal, the polar radius and the radius of curvature of the profile of the antenna, the input data bus which is connected to the output of ICH, and its control input connected to the output of the inverter; an information controller (IR) 26 for forming a digital code control commands spatial position of the laser beam, the optical gain of the collimators and focus the first Converter (DAC) (D/A1) 27 with the drive (PR-1) control optical amplification collimators, through (DAC) (D/A2) 28 driven PR-2 control the focal length of aryabhatta through DAC (D/Ash and D/ABC) 29 and 30 actuators (PR-3 and PR-3U) two-dimensional deflection unit and to the input of a digital processor, and the control input IR connected with GR and bus external synchronization.It is evident from Fig. 2, 3 and properties of a parabolic surface (see Drabkin, A. L. et al. Antenna-feeder devices. M. the Soviet radio, 1974) derived the basic calculation formulas necessary to explain the principle and algorithms of the proposed device for decorative set of coordinates X, Y, Z parabolic antenna (KA) on the input tyres IR.The polar radius of the surface points of the antenna with the center focus of the mirror
, (1) where f is the focal length of the paraboloid.The polar angle of the surface points of the antenna
Polar radiustopoints controlled antenna taking into account the deviation from the reference form
Deviation of the normal profile from the reference antenna
h= cos / 2 (4)
The polar anglesxandypoint the antenna in the orthogonal planes, respectively, in the plane XOZ
x= arctan (5) in the plane YOZ
y= arctan (6)R (8)
r cos (10)
The angle between the normal to the mirror surface and the polar radius is equal to /2.In Fig. 4 shows timing diagrams of control signals and information signals in optical-electronic unit of the device.In Fig. 4A shows the external synchronization signal SYN durationc.In Fig. 4B pulses Uggenerator sweep durationpand the interval Tp, and Fig. 4B is inverted by the pulse generator sweep.In Fig. 4G voltage CLAYS controlling the frequency GCC with the period
Tmp+ Tp. (11)
In Fig. 4D shows the law of variation of the frequency GCC with a deviation of fmfp. maxfp. minthe output of the delay line
fp= fp. min+ (t-tD) (12) and (dashed) the law of change of the modulating frequency fLcarrying laser beam elapsed between the controlled and reference antennas
fL= fp. min+ (t-tL) (13)
Signals of frequencies fnand fLthe input mixer with a lag of fL< / BR>tLtLtD, (14) where tLthe delay time of the signal between antennas;
tDthe delay signal is 15)
where LoGf + H the optical beam path between the antennas with a reference profile;
N. the distance between the foci of the antenna;
With the speed of wave propagation 3108m/sThe delay time of the signal between the antennas
In Fig. 4E shows a graph of the difference frequency output of mixer: upper difference frequency time interval tL< / BR>FRV= fL-fn(tD-tL) (17) of the lower difference frequency time interval TmtL< / BR>FpH= fn-fL(tL-tD) (18)
In Fig. I shows a time chart of the lower difference frequency FpHFpat the entrance ICH time interval Tp.In Fig. S presented at the output CF the digital code and the sign of the deviation profile h controlled antenna from the reference positive and negative values ( h) normal to the profile. From expressions(13)-(16), (18) it is easy to set the lower difference frequency at the output of ICH.Difference frequency at the output of ICH
Fp= t-t+ (19) Where Tmthe period of the signals CLAYS. From (19) we obtain the estimated algorithm h
h (20) where Fm1/Tmfrequency modulation GCC;
FofmFm(tLotD),/SUB> > Fo, h > 0; Fp< Fo; h < 0; FpFo, h= 0.The deviation of the profile of the antenna along the polar radius is computed by algorithm
h/cos /2 (21)
The absolute value of the polar radius of the antenna is determined by the relation (3).The proposed device operates as follows. The beam from the laser 1 is modulated by the intensity modulator 2, the input of which is applied an electrical signal with linear frequency modulation (chirp) from GCC 3, management is made from CLAY 4, Tmmodulation which specifies GR 5. Next, the modulated laser beam collyriums collimator 6 is focused by the lens 8 and through an axial hole in a controlled mirror antenna is directed by the deflector 10 to the surface 11 KA. The spot diameter dplaser beam on the mirror surface, from the viewpoint of resolution and accuracy must have a minimum value. This is achieved by focusing the beam on the mirror surface of the lens 8.The spot diameter on the surface 11 KA equal
dptofin, (22) wheretothe angular divergence of the beam at the exit of the collimator 6E;
finthe focal length of the lens 8. In his acereda;
G optical amplification of the collimator.To ensure equality OF1And rays to the focal length finlens 8 for any point of the mirror 11 with coordinates X, Y, Z, you must perform the following condition:
finf + . (24)
Then the spot diameter on the mirror 11
dp= (f+) (25)
From (25) it follows that, in order to perform conditions of dpconst for all surface points KA with coordinates X, Y, Z, you must change to change the gain of the collimator according to the following algorithm:
Gl(f + )/dp. (26)
Technical implementation for the condition dpconst on the mirror KA is achieved by placing between the modulator and the axial hole 11 KA collimator 6 drive 7 for the control of optical gain and lens 8 drive 9 control focal length.These actuators are connected respectively to the DAC 27 and 28 with the output data bus IR, which forms at the given coordinate (X, Y, Z and the parameters fldpcommand codes control the focal length of the zoom lens 8 and the strengthening of the collimator 6 in the following algorithms:
fin= f+ (27)
The deflector 10 is designed for precision Dujardin armorum 26 IR algorithms (5) and (6). Weekend busxandyIR 26 is connected to the actuator 14 through the DAC 29 and 30. For scanning the laser beam can be used, for example, the scanning vibrating unit, developed by the research center "Vibrodevices" Kaunas Polytechnic Institute. Snieckus.Reflected from 11 KA laser beam passes parallel to the axis of the system to the surface 12 EA, Bouncing off him, falling on the reflector baffle 13 driven by the actuator 14 synchronously with the deflector 10, and then is directed through the axial hole in the EA on sequentially and coaxially mounted lens 15 and the collimator 17.The introduction of the EA, mounted coaxially with the AC and facing concave surface to the concave surface of the AC ensures the constancy of the rays for any point on the SPACECRAFT with coordinates X, Y, Z, which is a fundamental basis for the construction of the proposed system based on the frequency method ranging, high potential which the accuracy and range of measurement is well known.During the propagation of the laser beam between the mirrors because of its divergence size of the cross section of the beam on the EA increases. Essentially, this beam represents the angular range of flat LCD.After detection at the photodetector at the output will provide a wide range of frequencies, which is transferred after conversion in the mixer in the region of the difference frequency.A wide range of difference frequencies reduces noise, clarity, resolution and measurement range, and therefore, reduces ultimately the accuracy of the measurements.To improve resolution, noise immunity and range measurements between the axial hole in the EA and the photodetector sequentially and coaxially installed the zoom lens 15 to the actuator 16 and the collimator 17 to the actuator 18 for the control of optical amplification, so the size of the receptor spots on the surface of the EA remains constant for any contact surface EA. The actuators 16 and 18 are controlled synchronously with the actuators 9 and 7 signals from the DAC 28 and 27. Essentially, consistent and aligned placement of the zoom lens 15 and the collimator 17 with a variable optical amplification is a tunable narrow-band spatial-angular filter, ensuring the constancy of the size of the receptor (perceiving) stains on the surface of the EA and emit only the light beam of the measuring beam between CA and EA, which allows narrowing sidenote and ultimately the accuracy of the measurements.The spot size at EA is determined by the formula (24), and the control algorithm is the focal length of the zoom lens 15 and the optical gain of the collimator 17 is described by expressions (27) and (28). In addition, ensuring the constancy of the size of the receptor spots on EA allows to provide a constant signal level at the output of the photodetector 19, i.e. at the input of the mixer 20, which eliminates the occurrence of Raman frequencies when converting that lead to a blurring of the spectrum signal of the difference frequency, and consequently, to reduce measurement accuracy.The signal from LMC output of the photodetector, delayed between CA and EA at time tLand the signal with the chirp output GCC detained in line 21 of the delay time tDmix in the mixer 20. The instantaneous frequency of these signals are determined respectively by the expressions (13) and (12).Fundamentally at the output of mixer 20 is allocated spectra of the upper (17) and bottom (18) of the difference frequency. To expand the measurement range, improved noise immunity and resolution of the measured deflection profile, and thus ultimately increase the accuracy of the scheme matches (SS) 22 output signal only the lower difference frequency defined in the Naya frequency Fpclearly connected with the deviation of the profile h in accordance with the algorithm (20) is converted into a digital code by measuring the frequency (ICH) 24, strobing in time inverted pulses G from the output of the inverter 23.Gating ICH on the time dimension of the lower difference frequency increases immunity, ICH can be made for the analog-to-digital Converter frequency (see hares, F. and other electronic automatic control system high precision. Kyiv: Tekhnika, 1988, S. 23).Code difference frequency Fpintroduced in the digital processor (WED) 25, where the entered angle , FofmFmand S. WED 25 calculates h algorithm (20), the algorithm (3), the angle value is calculated at 26 IR algorithm (2).Control input WED 26 is connected to the output of the inverter 22, which allows strobirovat the work of the CF at the time of measurement of the difference frequency and thereby improves the reliability and robustness of the system.To evaluate the accuracy and range of measurements of the deviation of the profile in the proposed system. From the expression (20) it follows that the minimal resolution of (h) is
(h) for Example, if FpFo1 kHz; C3 1014µm/C; fm1000 MHz; FM 1 MG will be less than 0.1 μm, what better order than in the prototype.The measurement range is determined as follows from (20), the maximum value of Fowhen Fp0.For example, if fm1000 MHz = 90aboutFm1 MHz and the difference between tLotLotD10-8C; Fo10310610610-810 MHz
In the prototype, the maximum value of h is 150 μm.Thus, the range of D hmax/ hminmeasurements in the prototype will be Dp150, in the proposed system, Dp107, i.e. the measurement range in the proposed system is expanded more than 104time. To eliminate the ambiguity of reference hpin the proposed system, the duration ofppulse GR must be at least two times greater than tLo, i.e.p2 tLo. In the above example
p> 20 NS.The deviation tolerance profile microwave parabolic antennas is /16, where is the operating wavelength of the antenna (see Dorokhov A. P. Calculation and design of antenna. Kharkov, 1960), for Example, 0.8 mm; hSS50 μm, hence the relative measurement error of the proposed system is
(hp) 0.2% in the known system
ldpformed by the information controller 26, the output data bus which is connected to respective actuators through DAC 27-30, and its control input IR is connected to the output of GR and bus external synchronization.Hardware implementation 26 IR and SR 25 can be executed on the microprocessor sets, for example, a series To 1801 To 1810 (see the Reference. Microprocessors and microprocessor sets the IP. Edited Sakhnova, so 2. M. Chapman and hall, 1988).In comparison with the known technical solution proposed system for controlling the shape of a parabolic antenna provides improved noise immunity due to the use of collimators with controllable optical amplification and aryabhatta managed a focal length that allows you to get a minimal and constant size of the laser beam on the surface of CA and EA and to perform spatial-angular filtering of the axial rays of the beam by introducing into the processing device schema matching and Gating ICH and myCitadel (CF) only at the time of selection of the lower difference frequency; the increase in spatial resolution due to dynamic focusing of the measuring spot on the surface is the surface will be in accordance with (22) dp500 2 10-510310 μm. This spatial resolution is unattainable contact methods, and prototype implementation of such a permission is associated with avoidance of precision actuators move the laser to keep the spot of the touch on the surface of the mirror. In addition, the dynamic focusing of the beams on the AC and EA allows to maintain a constant signal level at the input of the photodetector; the expansion of the dynamic range into three or more order than in the prototype, by introducing into the system an optical modulator driven GCC, for example linearly, the photodetector, mixer and delay lines. DEVICE FOR CONTROLLING the SHAPE of the SURFACE containing the laser, the two deflector mechanism of the spatial displacement of the laser beam, a photodetector, a computing unit, a controller, motion control, characterized in that, to improve measurement accuracy, noise immunity, the extension of the measurement range and resolution enhancement techniques, it is equipped with a ramp generator voltage and generator sweep, sequentially and coaxially mounted along the laser beam optical modulator, electric entrance through which generativism collimator with a controlled optical amplification to drive movement of the movable elements of the afocal attachment lens of the collimator, the first zoom lens with a controlled focal distance driven moving parts of the optical system of the zoom lens, the reference parabolic antenna, please reflecting surface for reflecting the surface of the inspected antenna, the second zoom lens with controllable focal length of the second actuator moving the component parts of the optical system of the zoom lens, the second collimator with controllable optical amplification with the second actuator moving the movable elements of the afocal attachment lens of the collimator, delay line, generator sweep, schema matching, digital speed meter, inverter, four d / a converters, computer unit made digital, the output of the photodetector is connected to the first input of the mixer, the second input is through the delay line is connected to the generator output oscillating frequency, and the mixer output is connected to the first input of the circuit matches the second input of which is connected through an inverter to the output of the sweep generator, the information input of the digital speed meter is connected to the output of the circuit matches, and the entrance gate is connected to the output of the inverter, the input data bus, the course of the inverter, the output data bus of the controller through a digital to analogue Converter is connected to the control, and the control input of the controller is connected to the input of the sweep generator and the bus of the external synchronization mechanism of the spatial movement is made in the form of a drive connected to the deflectors placed in focus parabolic antennas.
FIELD: measuring arrangements.
SUBSTANCE: device comprises unmovable base provided with the first cantilever, two carriages provided with drives controllable with a computer, pickup of linear movements, arrangement for mounting blade and first measuring channel connected with the computer. The first carriage is mounted on the unmovable base and is made for permitting movement parallel to the X-axis. The first measuring passage is defined by the optoelectronic head and units secured to the unmovable base, third carriage provided with an actuator controlled by a computer and pickup of linear displacements, second measuring channel, first and scone markers of the blade with actuating members controlled by a computer, arrangement setting the blade mounted on the first carriage and made for permitting rigid orientation of the blade in the vertical plane, second and third carriages arranged on the first and second cantilevers, respectively, and made for permitting movement parallel to the Z-axis, first and second markers of the blade, fiber optic heads of the first and second measuring channels arranged on the second and third carriages from the both sides of the study blade. The objectives of the fiber optic heads are mounted for permitting triangulation link of the photodetector with the sourced through the blade surface of the blade to be tested.
EFFECT: enhanced efficiency.
6 cl, 7 dwg
FIELD: measurement of object shape.
SUBSTANCE: the device has two luminous radiating systems located relative to the measured surfaces of the object, each of them forms luminous lines at the preset sections of the object, a photoreceiver with an objective lens and a computer unit, whose input an objective lens and a computer unit, whose input is connected to the output of the photoreceiver. The photoreceiver is made in the form of a matrix and is optically coupled to each luminous radiating system. In addition, the device has mirrors located relative to the measured surfaces of the object at an acute angle to its surface and is optically coupled to the photo-receiver through the objective lens, whose optical axis is positioned in the plane of symmetry.
EFFECT: enhanced accuracy of measurement, capacity and simplified construction of the device.
6 cl, 2 dwg
FIELD: the invention refers to measuring technique.
SUBSTANCE: the mode of measuring the form of an object includes formation of a light line on the surface of the object with the aid of the light-emitting system lying in the preset cross-section of the object, getting the image of the light line, its processing and definition of the coordinates of the profile of the cross-section of the object. AT that collateral light lines are formed on the surface by turns with the aid of two light-emitting systems illuminating the surface in preset cross-section of the object at different angles in its every point, images of light lines are received. On each of them sites are revealed. A resultant image is compiled out of the images of the indicated sites. According to this resultant image the coordinates of the profile of the cross-section of the object are determined. The arrangement for measuring the form of the object has a light-emitting system optically connected with a photoreceiver and a computing unit. It also has one additional light-emitting system optically connected with a photoreceiver and a commuting unit connected with its input to the computing unit, and with its output - with every light-emitting system. Optical axles of light-emitting system are placed in one plane and located to each other at an angle equal 5-800.
EFFECT: the invention increases accuracy of measuring by way of excluding the distortions of the zone of influence on the results of measuring.
13 cl, 5 dwg
FIELD: measuring engineering.
SUBSTANCE: method comprises setting the article to be controlled on the movable traverse gear having two extent of freedom, illuminating the surface of the article by light, receiving the light reflected from the surface of the article with the use of a photodetector, moving the article parallel to the X-axis, determining coordinates of the light spots on the photodetectors of the current values of the heights of the article shape, locking the position of the table, scanning the main section of the article shape, comparing it with the reference one , and determining the quality of the article shape. The main section is scanned by moving the article parallel to the Y-axis, when the traverse gear is in a position determined from the formula proposed. The device comprises unmovable horizontal base, vertical cantilever secured to the base, unit for measuring the article shape mounted on the vertical cantilever, two carriages that define a traverse gear and provided with the individual drives controlled by a computer, and pickup of linear movements. The first carriage moves parallel to the X-axis, and the second carriage is mounted on the first one and moves parallel Y-axis.
EFFECT: improved quality of control.
4 cl, 4 dwg
FIELD: measuring devices.
SUBSTANCE: device for controlling blade stylus profile contains immobile base, held on which is vertical overhanging support, rotary table, provided with rotation drive, angular movements sensor and blade holding device, range finder, consisting of a source of narrow light beam, integration multi-element photo-detector and objective, and personal computer. Device additionally contains a carriage, mounted on vertical overhanging support and provided with drive for movement along overhanging support along coordinate Z of coordinates system of device, connected to output of personal computer, and linear movement indicator, connected to input of personal computer, means for moving distance meter is made in form of two-part mechanism with movement plane, parallel to XOY plane of device coordinates system. Rotary table is mounted on immobile base and is made with possible rotation of blade being controlled around axis, parallel to axis Z of device coordinates system.
EFFECT: increased precision of measurements and increased trustworthiness of profile control results.
2 cl, 4 dwg
SUBSTANCE: method comprises measuring the angles of inclination of the members of the surface of the sheet in each of the belt longitudinal sections of the strip selected by the measuring device. The angle defined by the lines of intersection of the plane tangent to the surface of the sheet at the point of measurements and plane tangent to the bearing members are measured. The flatness of the sheet is determined from the formula proposed.
EFFECT: enhanced precision.
FIELD: electro-optical engineering.
SUBSTANCE: electro-optical device for controlling profile of blade runner has motionless horizontal base, two vertical posts disposed onto base at opposite sides of runner to be controlled, first carriage disposed onto motionless base for movement between vertical posts in parallel to X axis and provided with first linear movement detector and first drive. Device also has second and third carriage mounted onto vertical posts for movement in parallel to Z axis and provided with second third linear movement transducers correspondingly, contrivance for mounting blade disposed onto first carriage which provides strict positioning of blade runner in vertical plane. First and second electro-optical heads are disposed onto second and third carriages and formed each of narrow light beam sources of multi-element photoreceiver, which is provided with sweep-out and code forming unit. Device also has objective. Objectives of electro-optical heads are mounted for triangle optical communication of photoreceivers with narrow light beam sources through corresponding surfaces of runner of blade to be controlled. Device also has second drive and computer. Inputs of computer are connected with outputs of linear movement detectors and of multi-element photoreceivers; outputs of computer are connected with drive of device. Device has joist which connects vertical posts; it forms the first portal and second portal which has vertical posts disposed at opposite sides of blade to be controlled. One post of second portal is attached to second carriage. Light radiation source and receiver, conjugated optically, are provided with corresponding objectives and are fixed at different posts of second portal. Flexible cinematic coupling connects second and third carriages. Second drive is disposed onto joist of first portal and it is provided with driving roller which communicates with flexible cinematic coupling. Output of light radiation receiver is connected with input of computer. False parts of contour of runner are eliminated out of memory of computer.
EFFECT: improved truth of results of control; reduced number of drives.
2 cl, 3 dwg
SUBSTANCE: method of design of three-dimensional profiles of the object, including generation of sounding pulses of laser radiation for step scanning of the object in the plane transverse to the direction of the radiator movement, with consecutive processing of the reflected from the object signal to design profiles of objects, differs from the other methods by the fact, that before reflected signal gets processed a laser beam is generated in a discontinuous mode, generated beam is broadened, transformed into light beam of annular cross-section; generation of sounding pulses of laser radiation for step scanning of the object is conducted by successive alternative fragments cutting out from the cross-section of the received light beam of annular cross-section.
EFFECT: improving accuracy of measurement and article technological efficiency.
5 cl, 1 dwg
FIELD: machine building.
SUBSTANCE: profile of roller surface is geometrically limited with first zone corresponding to relief facet of roller, with second zone corresponding to interface of cylinder part with relief facet of roller and with third zone corresponding to cylinder part of roller. The procedure consists in measuring profile of roller surface. On base of calculated results of the first derivative of measured profile, segments of straight line, modelling the first derivative of measured profile, are calculated for each of geometric zones of the roller. Radii of curvature of roller surface profile are calculated by means of determination of the first derivative of straight line segments. Calculated radii of curvature are compared with preliminary determined threshold values to control continuity of the said radii.
EFFECT: facilitating control of interface of cylinder and relief parts of roller of rolling bearing.
2 dwg, 4 cl
SUBSTANCE: apparatus, method and system for measuring thread parameters at the end of a tube or a threaded pipe, comprising: an optical sensor which measures a first thread parameter by detecting light from a light source lying on the opposite side of the axis of the tube or pipe, and essentially passes parallel the thread groove; a contact sensor which measures a second thread parameter through contact of contact probe with the thread lateral surface and detection of spatial coordinates of the contact probe during contact; and processor which calculates thread parameters from the combination of the first thread parameter and the second thread parameter. High-precision measurements can be taken even for a thread parameter associated with hook lateral surfaces, which is susceptible to considerable measurement errors when measuring only optically since they are almost completely hidden in the shadow of the thread crest. Using the disclosed system of measuring thread parameters, the height at which a threaded tube is placed can be adjusted using a height adjustment mechanism so that the reference measurement axis of the thread parameter measuring device can be level with the central axis of the threaded tube.
EFFECT: high accuracy of measuring thread parameters associated with thread lateral surfaces.
9 cl, 12 dwg