Autocollimator for measuring angle of torque

FIELD: measurement equipment.

SUBSTANCE: invention refers to measurement equipment, to measuring devices characterised with optic measuring devices, and can be used to solve a wide range of engineering problems including measurement of flat angles, such as adjustment of optic-electronic system, assembly large-sized constructions, remote control and remote transfer of values of the angle, etc. Autocollimator meant for measuring the angle of torque includes lighter, the following which is installed in beam direction: capacitor, mark, beam divider, objective, reflector in the form of triple prism, which is installed with possibility of being turned about optic axis, and one of the edges of the above prism has deflection from straight angle, photodetector array connected to the computing device. At that, mark is installed in focal plane of the objective, and photoreceiver - at autocollimating point. Photoreceiver is made in the form of two matrixes installed at autocollimating points, some part of the mark field is made in the form of linear raster, and some part - in the form of a line, and before some matrixes recording the mark field picture in the form of raster. In addition, linear rasters are tightly attached to them; at that, mark raster and additional rasters are oriented parallel to columns of matrix photoreceiver.

EFFECT: increasing measuring sensitivity, increasing the operating measurement distance and decreasing overall dimensions.

2 dwg, 1 ex

 

The invention relates to the field of measuring equipment, measuring devices, characterized by optical measurement devices, and can be used for a wide range of technical tasks such as aligning the opto-electronic systems, Assembly of large structures, the determination of the parameters of the stiffness of the shafts, remote measurement and remote transmission angle twisting and other

Known autocollimator for measuring the twisting angle [U.S. Pat. RU # 2182311, IPC G01B 11/26, prior. 10.05.2001,]. The autocollimator is composed of two marks in the form of low-frequency raster with lights, beam splitter, a lens, a reflector in the form of unit prisms AR-90, the photodetector in the form of FPSS-lines that are posted on the measuring base, and a computing unit. The lights illuminate the brands that are installed in the focal plane of the lens. The parallel light beam after passing through the lens falls on the reflector in the form of unit prisms AR-90, is reflected from it, passes through the lens, is reflected from the beam splitter and enters the photodetector installed in the focal plane of the lens. On lines FPSS-lines of the photodetector image appears low-frequency rasters brands, rotation of which relative to the coordinates of lines equal to twice the angle of rotation of the reflector.

Information in the form of coordinates Rastro the marks on FPSS-lines entered in the computing unit, where the calculation of the twisting angle. The twisting angle is defined as

,

where X1, X2- the offset of the low-frequency image of the raster relative to the coordinates of FPSS-lines 1,2 photodetector;

B - measuring base (distance running FPSS-line of the photodetector).

The sensitivity of the device depends on the measuring base, the number of strokes of the low-frequency raster and parameters of a sensor (the size of the element and the signal/noise).

The disadvantages of the autocollimator are not high enough sensitivity and the need for accurate angular installation reflector in the form of unit prisms AR-90 about the optical axis.

To increase the sensitivity of the measurements it is necessary either to increase the measuring base, which leads to the complexity of the design of the lens, as well as reducing the working distance, or to improve the characteristics of the photodetector to increase the signal-to-noise ratio), which is technically very difficult and ineffective. For example, increasing the signal/noise 10 times leads to increased sensitivity to 3.16 times.

Known for our chosen as a prototype autocollimator for measuring the twisting angle [SYN Sanmin. Research and development three-dimensional opto-electronic autocollimators.// The dissertation on oskana degree of candidate of technical Sciences. University telecommunications. Saint-Petersburg. 2007].

The autocollimator consists of a light source installed along the beam condenser, brand crosshairs, beam splitter, lens, mounted rotatably around the optical axis of the reflector in the form of triple prisms, one of the direct dihedral angles which deviates from 90°, matrix of a sensor installed in the autocollimating point, and connected to the receiver computing device.

The light source through the condenser illuminates the mark set in the focal plane of the lens. The parallel light beam after passing through the lens hits the triple-prism, is reflected from it in the form of two inclined parallel beams, which pass through the lens, a beam splitter and fall on the photodetector installed in the focal plane of the lens in the autocollimating point. On the photodetector appear two images of the crosshair marks spaced at a distance defined by the focal length of the lens and the deviation from 90° of one of the direct dihedral angles triple-prism. Rotation triple-prism around the optical axis leads to plane-parallel movement of the target images on the circumference, and the angular displacement around the optical axis is equal to the angle of rotation of the reflector. Informacijas of a sensor is introduced into the computing unit, which is determined by the twist angle.

The twisting angle is defined as

,

where X1-X2- the offset of the image of the crosshairs relative to the X-coordinates of a sensor during rotation of the reflector;

f is the focal length of the lens;

ϕ is the angle of deviation of the dihedral angle triple-prism 90°;

n is the refractive index of the material of the prism.

The autocollimator is less sensitive to the alignment of the reflector with respect to the optical axis, however, its sensitivity depends on the radius of rotation of the target image defined by the focal length of the lens and the deviation of the dihedral angle triple-prism 90°, as well as the parameters of the photodetector matrix (number and size of the element, the signal/noise). To increase the radius of rotation, resulting in an increased sensitivity of the measurements, it is necessary either to increase the focal length of the lens, or to increase the deviation of the dihedral angle triple-prism 90°, which in both cases leads to increased size and complexity of the design of the lens and reduce the working distance.

Increased sensitivity by improving the receiver parameters, such as increasing the signal-to-noise due to cooling is ineffective. So, the increase of the signal-to-noise ratio 46 dB to 61 dB (real d is by serial photodetectors) increases the sensitivity of just 2.3 times when the change rates of the sensors is approximately 15 times.

Taking a plane-parallel displacement of the target image on the circumference in a small range of angles as a linear offset along one of the orthogonal components of the motion vector (as in the prototype), we substantiated and experimentally shown that it is possible to significantly improve the sensitivity of the measurement of the twisting angle, applying for measuring linear displacement moire system, for which performing brand in the form of a linear raster and additionally typing in front of receivers linear rasters, which is different in frequency from the frequency raster of the brand.

However, this performance marks to increase the sensitivity of measurement of the angle of twisting you need to use specific optical scheme of the autocollimators. For instance, dihedral reflector AR-90 (or a set of dihedral reflectors), chosen as a counterpart, gives the rotation of the target image around the pivot point, which does not allow to apply it moiré system.

Plane-parallel displacement of the target image on a circle with a radius defined by the angle of deflection of the rays of the reflector and the focal length of the lens, will use as a reflector, for example, such elements as the triple prism deviation of one of the angles from 90 deg., dihedral reflector with an angle at the apex, close to 180 degrees, the low frequency of the WPPT, the action bars. From the point of view of efficiency the best of them is the triple prism deviation of one of the angles from 90 degrees, which has a wider tolerance on flat corners when installing it about the optical axis.

We offer a highly sensitive autocollimator for measuring the twisting angle, working with a large range of distances.

This technical result is achieved by us, when the autocollimator for measuring the twisting angle, including the illuminator is placed along the beam condenser, a brand, a beam splitter, a lens, mounted rotatably around the optical axis of the reflector in the form of triple prisms, one face of which has a deviation from the right angle, matrix photodetector connected to a computing device, while mark is set in the focal plane of the lens, and the photodetector in the autocollimating point, characterized in that the photodetector is made in the form of two matrices that are installed in the autocollimating points of the field marks made in the form of a linear raster, some in the form of a bar, and front part of the matrix that registers the image field marks in the form of a raster, advanced against them installed linear rasters, while raster brand and additional rasters are oriented parallel to the columns of the matrix sensor.

On figa set is s schematic diagram of the autocollimator, where the light source 1, a condenser 2, mark 3, a beam splitter 4, a lens 5, a reflector 6, a linear rasters 7, 8, matrix, 9, 10 of the photodetector, unit 11 of the information processing and calculation of the twisting angle.

On figb shown in an enlarged scale image of the brand, line, raster, and image on the photodetector.

The autocollimator is as follows.

The light source 1 by means of the condenser 2 lights mark 3, the portion of the field which is made in the form of a raster, and some in the form of a bar. Mark 3 is installed in the focal plane of the lens 5. The light beam reflected from the beam splitting surface of the beam splitter 4 and enters the lens 5. The parallel light beam after passing through the lens 5 go to triple-prism 6, one face of which has a deviation from the right angle, is reflected from it and in the form of two parallel beams, inclined to the optical axis hits the lens 5, passes through a beam splitter 4, Vernier rasters 7, 8 and enters the matrix 9, 10 of the photodetector, with some grade 3, containing a raster is projected onto the corresponding part of the matrix 9, 10, before whom there Vernier rasters 7, 8. As a result, some parts of the matrix 9, 10 photodetectors formed the image of the barcode mark 3, and on other parts of the image moire patterns, the frequency of which depends on the frequency ratio of two p the Ministers: raster images grade 3 and Vernier raster 7, 8. When turning the reflector 6 around the optical axis is a plane-parallel displacement of the target image 3 with respect to the coordinate matrices 9, 10 of the photodetector with a radius determined by the angle of deviation of one dihedral corner reflector 6 of 90° and a focal length of the lens 5. This moire pattern recorded matrices 9, 10 of the photodetector has a linear movement of the extremes of the moire pattern is larger than the moving elements of the raster image of the brand. This allows you to use the move extremes moire patterns as accurate (Vernier) report, thereby to increase the accuracy of determining the angle of twist (with the same parameters of the lens and the photodetector).

Rough count in the autocollimator is taken as the offset image of the barcode mark (to preserve the uniqueness of the measurements because the moire pattern has a periodic structure).

In practice, the halftone screen frequency is chosen in the range of 0.1-0.5 limit frequency of the lens, on the basis of receiving on the one hand a sufficiently high contrast image raster, and hence the moire pattern, and on the other hand obtain several periods of moire on the photodetector. The frequency ratio of the raster marks and raster before the matrix photodetector device to simplify the algorithm for processing information, prepost is positive to choose 10:9.

The presence of Vernier readout allows using standard photodetector to increase the sensitivity of measurements (or to increase the working distance), and use as a reflector triple-prism - to reduce the requirements for installing the reflector relative to the optical axis.

The twisting angle ψ is determined in the computing device as

,

where X11-X12- the offset of the target image relative to the X-coordinates of the first matrix with the rotation of the reflector;

X21-X22- the offset of the target image relative to the X-coordinates of the second matrix with the rotation of the reflector;

f is the focal length of the lens;

ϕ is the angle of deviation of the dihedral angle triple-prism 90°;

n is the refractive index of the material of the prism.

An example of a specific implementation.

According to the scheme in figure 1A created the layout of the autocollimator for measuring the angle of twist. As a light source was used led (λ1=0,87 μm), the lens had a focal length of 700 mm, and diameters of 80 mm, a deviation of one corner of the triple prisms from direct 20 coal. min, as photodetectors served digital matrix format of 6.4×5.2 mm, data from the photodetectors were entered into a computer (Pentium-4. Raster grade 3 had a frequency of 10 gr./mm, rasters, 7 and 8 had a frequency of 9 gr./mm

Sootnosheniyu selected raster 10:9, that leads to increased sensitivity Vernier channel in 10 times in comparison with the coarse channel. This ratio simplifies the algorithm processing. Software known algorithm with averaging over the rows of the half-matrix of the energy center was determined coordinate of the image of the stroke of the brand relative to the coordinates of the matrix. The position of the extrema moire patterns relative to the coordinates of the matrix was performed using the algorithm of the two-dimensional approximation of a sine wave moire patterns. Then these data were converted to the rotation angle of the triple prisms taking into account the focal length of the lens, the deviation of one face of the prism from the right angle and the size of the matrix element.

The measurement range of the autocollimator was ±2.5 coal. hail, sensitivity to change of the twisting angle - angle of 0.5. sec.

The advantage of the proposed scheme autocollimator for measuring the angle of twist is the ability to significantly improve the sensitivity of measurements without significant design changes, using standard matrix receivers, to increase the operating distance measurements and to reduce the size of the device. The presence of the autocollimator two symmetric autocollimating points simplifies the implementation of some useful schemes for measuring angles of twist, for example voispechennogo scheme, you can reduce the influence of air flow on the results of measurements in the field.

When performing a triple-prism deviation of one corner from direct 2 coal. min is possible to increase the operating distance to 10 meters, having the sensitivity to change of the twisting angle 5 angle. sec. All other system parameters remain the same.

Assume the use of the proposed technical solutions in the system for remote transmission of the angular coordinates. Currently under design development system.

Autocollimator for measuring the twisting angle, including the illuminator is placed along the beam condenser, a brand, a beam splitter, a lens, mounted rotatably around the optical axis of the reflector in the form of triple prisms, one face of which has a deviation from the right angle, matrix photodetector connected to a computing device, while mark is set in the focal plane of the lens, and the matrix photodetector in the autocollimating point, characterized in that the matrix photodetector made in the form of two matrices that are installed in the autocollimating points of the field marks made in the form of linear raster, some in the form of the dash and front part of the matrix that registers the image field marks in the form of a raster, additionally close to n the m set of linear rasters, when this raster brand and additional linear rasters are oriented parallel to the columns of the matrix sensor.



 

Same patents:

FIELD: measurement equipment.

SUBSTANCE: invention refers to measurement equipment and can be used for enlarging a wide range of engineering problems, such as adjustment of optical-electronic systems, assembly of large-sized constructions, and determination of shaft stiffness parametres, etc. Autocollimator meant for measuring the angle of torque includes the following which is located on optical axis: lighter from light sources and capacitors, which are made in the form of low-frequency mark raster patterns, beam divider dividing light beam into illuminating and measuring channels, objective, photoreceiving device, reflector in the form of a block of prisms AP-90 and computing unit. At that, marks and photoreceiving device are installed in focal plane of the objective. Each light source of lighter is made in the form of two radiation sources of various spectral range λ1, λ2, the optical axes of which are aligned, and the objective is achromatised on wave lengths λ1, λ2. In addition, to the device there introduced is information read-out control unit on various wave lengths, which is connected to lighter and photoreceiving device, and the latter is made in the form of two matrixes delivered to the measuring base.

EFFECT: providing reliable and easy operation in field conditions.

2 dwg, 1 ex

FIELD: instrument making.

SUBSTANCE: invention is related to the field of inspection technology, in particular to instruments for monitoring of television system parametres. Device comprises the following components installed serially on optical axis - lens (1) and holder (2) for placement of test-object (3), and also accent light system (4). Lens (1) is installed with the possibility of displacement along its optical axis and is equipped with counting device (5). Accent light system (4) includes at least two blocks of lamps (6), which are symmetrically installed relative to optical axis of lens (1) with the possibility of block-wise connection of lamps. At least between one of lamps (7, 8, 9) of accent light system (4) and holder (2) for installation of test-object (3), the following components are installed serially - diffuser (10) and the first attenuator (11) of light radiation at axis that connects centre of holder (2) for installation of test object (3) and centre of lamp glowing body (8). Lens (1), holder (2) for installation of test object (3) and accent light system (4) are installed inside light impermeable body (12), which has opening for withdrawal of holder (2) for installation of test object (3) outside the limits of body (12) for replacement of test object (3).

EFFECT: expansion of instrument functional resources by provision of possibility to create wide range of rated values of illumination in plane of test object and possibility of simple manufacturing and installation of replaceable test-objects with different patterns.

7 cl, 1 dwg

FIELD: optics.

SUBSTANCE: proposed method comprises fitting the collimator, to be set for infinity on optical bench, so that TV camera adjusted for infinity with respect to distant object receives, via collimator lens, the collimator reticule image, and focuses the collimator till producing high-quality reticule image on TV camera monitor.

EFFECT: simplified method of setting collimator for infinity.

3 cl, 1 dwg

FIELD: physics.

SUBSTANCE: invention is related to measurement devices characterised by optical measurement facilities, and may be used for solving wide range of technical tasks including measurement of flat angles, such as alignment of optoelectronic systems, assembly of large-size structures, remote measurement and remote transmission of angle values, etc. Autocollimator for measurement of flat angles includes illuminator, the following components located along beam direction - condenser, mark, beam splitter, lens, autocollimator mirror installed with the possibility of alignment by two angular coordinates, matrix photodetector and unit of information processing, at that mark and photodetector are installed in lens focal area, at that part of mark field is arranged in the form of slit raster, and part - in the form of line, and additional raster is installed in front of matrix photodetector part registering mark field image in the form of slit raster, close to it.

EFFECT: increased accuracy of measurements due to reduction of measuring track noises effect at simultaneous increase of measurement range and reduction of autocollimator dimensions.

4 dwg

FIELD: physics.

SUBSTANCE: invention concerns working-capacity control devices for aviation sighting and monitoring video systems, as well as for flight personnel training. The said device consists of collimator tube, bracket with prism, and light filter fixed at the exit face of collimator tube. Collimator tube includes cylindrical case with an objective lens at its exit end, and a running head attached by a slide to the entrance end face of cylindrical case with two horizontal guide rails. Ring seat of the running head has a grade rod inside, with illumination lamp in front of the rod. L-type bracket with a linear actuator is fixed at the outer side of running head. Grade rod consists of two clamping glasses and a removable slide, and is moving against the optic axis of the collimator tube.

EFFECT: higher reliability of working-capacity control of aviation sighting system video monitoring and application of working-capacity control as flight personnel training equipment.

4 dwg

FIELD: measuring devices.

SUBSTANCE: photoelectric autocollimator can be used for measuring value and direction of angular movement of object. Photoelectric autocollimator has radiation source optically connected with mask, light splitter, objective, scanner provided with control voltage source, mark and photoreceiver. It also has registration unit, unit for measuring direction of angular movement of object, first and second units for indication of angular movement of object.

EFFECT: widened functional abilities.

5 dwg

Ir collimator set // 2305305

FIELD: optics.

SUBSTANCE: IR collimator set has objective, removable test object disposed in focal plane of objective and provided with actuating member, control unit which has output connected with actuating member of background radiator, temperature processor which has output connected with input of control unit, unit for measuring temperature of test object which has output connected with first input of temperature processor, device for measuring temperature difference between background radiator and test object, which has output connected with second input of temperature processor. Environment temperature measuring unit is introduced into device additionally, which unit has output connected to third input of temperature processor. Temperature processor controls value of power voltage of background radiator's actuating member by means of control unit in such a manner than factual value of temperature difference between background radiator and test object coincide with current resulting required value, defined depending on required level of contrast radiation, current temperature of test object and current value of environment temperature to give precision which provides sustain of required level of contrast radiation with admissible error.

EFFECT: improved precision of sustain of contrast radiation level.

1 dwg

FIELD: electro-optical instrument engineering.

SUBSTANCE: two-channel electro-optical autocollimator is described having radiation source in near IR spectrum range. Autocollimator has two channels. Main channel has objective, beam-splitting prism and illuminator. Optical axis of illuminator is disposed along beam path, which beam is reflected from hypotenuse face of beam-splitting prism. Illuminator has the following parts disposed in series: beam-splitting prism of autocollimation mark, condenser and light source. Additional channel is disposed in parallel to axis of illuminator from main channel but on the other side of beam-splitting prism. Additional channel has additional objective disposed in series with flat mirror. Second illuminator is introduced into additional channel. Second illuminator is disposed at side of illuminator from main channel in relation to beam-splitting prism. Axis of additional channel is shifted in relation to axis of main channel. Both illuminators are optically conjugated with same hypotenuse face of prism. There is photo-receiving linear array in focal plane of objective of main channel. Light-absorbing plates are mounted onto beam-splitting prism. Additional prism is mounted onto opposite face of beam-splitting prism in site of crossing with same axis. Additional prism changes direction of axis of additional channel.

EFFECT: widened functional abilities; reduced sizes.

1 dwg

Infrared collimator // 2292067

FIELD: optics, possible use for controlling parameters of thermo-vision devices.

SUBSTANCE: infrared collimator contains objective, test chart, positioned in focal plane in front of background emitter, environment temperature sensor, corrector, meant for changing, in accordance to change of temperature of environment, of voltage at input of device for maintaining difference of temperature between background emitter and environment, input of which is connected to output of corrector, and output - to heater of background emitter. Introduced additionally is transformer, containing serially connected generator of stabilized voltage, first and second resistance elements, while first output of second resistance element is connected to second output of first resistance element, acts as first input of transformer and is connected to first output of environment temperature sensor, second output of second resistance element being the second input of transformer and being connected to second output of environment temperature sensor, and also second generator of stabilized voltage, output of which is connected to first input of differential amplifier, second input of which is connected to first input of transformer, while output of differential amplifier is an output of transformer and is connected to input of corrector, and environment temperature sensor has exponential dependence of resistance on temperature.

EFFECT: increased precision of control over parameters of thermo-vision devices due to increased precision of support of contrast radiation level.

4 dwg

FIELD: optical engineering.

SUBSTANCE: collimating optical system has objective disposed in series along beam path, which objectives are mounted in opposition to semiconductor lasers, and first group of prisms. Ribs of refracting two-faced angles of lasers are oriented in parallel to planes of semiconductor junctions. First positive component is mounted one after another along beam path behind group of prisms. Second group of prisms is disposed close to back focal plane of first positive component. The group of prisms separates input light beam along line being perpendicular to planes of semiconductor junction to two bundles. Polarization prism is disposed on the way of mentioned light beams to bring them into coincidence to one common light beam. Second positive component of the system has front focal plane brought into coincidence with back focal plane of first positive component.

EFFECT: increased brightness of output bundle of beams.

2 cl, 4 dwg

FIELD: measurement equipment.

SUBSTANCE: invention refers to measurement equipment and can be used for enlarging a wide range of engineering problems, such as adjustment of optical-electronic systems, assembly of large-sized constructions, and determination of shaft stiffness parametres, etc. Autocollimator meant for measuring the angle of torque includes the following which is located on optical axis: lighter from light sources and capacitors, which are made in the form of low-frequency mark raster patterns, beam divider dividing light beam into illuminating and measuring channels, objective, photoreceiving device, reflector in the form of a block of prisms AP-90 and computing unit. At that, marks and photoreceiving device are installed in focal plane of the objective. Each light source of lighter is made in the form of two radiation sources of various spectral range λ1, λ2, the optical axes of which are aligned, and the objective is achromatised on wave lengths λ1, λ2. In addition, to the device there introduced is information read-out control unit on various wave lengths, which is connected to lighter and photoreceiving device, and the latter is made in the form of two matrixes delivered to the measuring base.

EFFECT: providing reliable and easy operation in field conditions.

2 dwg, 1 ex

FIELD: measuring technology.

SUBSTANCE: invention refers to metrology, particularly to methods of calibrating goniometrical and angle specifying devices of a rotary type forming discrete circular scales of full and (or) not full ranges by means of comparing them with reference devices (reference scales). The essence of the invention is as follows: the disclosed here method is based on adjusting indices of the plan of measuring procedure and on performing interactive control of accuracy of its results. Adjustment is carried out by means of adaptive modifications of procedures of preparation and measuring. The procedure is established as sequence of comparisons of angles between marks of each of calibrated scales taken in pairs; also combinations of marks (pairs) are formed in series, number of which is not specified beforehand. Obtained primary data are processed by the method of the least squares on base of model equations connecting measured parametres; while algorithm of processing contains blocks of check of uniform precision of series (with their possible reject) and check of adequacy of accepted model ( with its possible refinement). The procedure is interactive and lasts till achieving required or utmost possible accuracy of results.

EFFECT: expanded range of discreteness of calibrated circular scales and refusal of full range requirement; also facilitating control over accuracy of calibration, including accuracy due to refinement of model of primary data.

6 cl, 5 dwg

FIELD: measuring technology.

SUBSTANCE: facility can be used in metrology, particularly for measurement of plane angle. The gauge consists of at least carrier of dial scale and a pointer, one of the two is immovable, while turn of an object specifying the measured angle is conveyed to another one. The multi-value gauge of two or more rays forming a flat semicircle or several semicircles serves as the pointer; also rays appear simultaneously or alternately; notably, the gauge maintains reference angles between separate rays. An external optical source radiates rays with reflecting facets of a prism or pyramid located on axis coaxial to a photo-receiver of panoramic type. The photo-receiver is located on internal cylinder surface and functions as a carrier of the dial scale.

EFFECT: improved metrological and weight-dimension characteristics as well as workability of facility at simultaneous increased reliability.

4 cl, 2 dwg, 2 tbl

FIELD: physics; optics.

SUBSTANCE: optical-electronic device is designed for obtaining information on rotation of point objects from intensity fluctuation of one polarisation component of received solar radiation scattered by the objects and their coordinates. The device has a cowling, an objective lens of a telescopic system, a reflector, a first polariser with a V-shaped plate, an eyepiece of the telescopic system, a second polariser, condenser and an optical radiation receiver. The device also contains a semi-transparent mirror, placed between the objective of the telescopic system and the first polariser under Brewster angle such that, the polarised component of solar radiation scattered by the object and reflected by the semi-transparent mirror is received by the additional photodetector, connected to an analyser of photoinduced current fluctuation.

EFFECT: determination of parametres of rotation of an object based on analysis of intensity fluctuation of one polarised component of received radiation with determination of coordinates of the point objects.

1 dwg

FIELD: oil-and-gas production.

SUBSTANCE: device contains ground-based equipment, connected by logging optical cable to borehole instrument, allowing flexible casing. Inside the casing there are located sensing elements, implemented in the form of optical fiber for direct and backward passing of light, semitransparent and cloudy mirrors. Center of gravity of borehole instrument is shifted relative to its longitudinal axis. One of sensing elements is implemented in the form of free loop. Loop contains linear and annular sections and is fixed in plane, passing through longitudinal axis of borehole instrument and its center of gravity. Additionally linear sections allows ability of lengthwise movement relative to flexible body, remaining equidistant to its generatrix.

EFFECT: excluding uncertainty of attitude position of sensing elements of the device in plane, perpendicular to axis of well and enhanced accuracy of received measurements.

2 dwg

FIELD: instrument making.

SUBSTANCE: invention is related to procedure of measurement and adjustment of vehicle wheels camber and toe. Method consists in the fact that optical target is made in the form of circular cylinder, an accidental image is applied on it. For each position of vehicle wheel they read images with the help of television chamber. Using computer, they calculate functions of mutual correlation of memorised video signals of extreme reading lines and extreme reading lines relative to central line, their extremes are defined, positions of which are used to identify appropriate shifts of optical target images. Shift of extreme reading lines images is identified. Ratio of extreme reading lines images shift to distance between extreme reading lines of television camera is identified, and its value is taken, when required, as wheel camber. Coefficient of television camera lens zoom is increased until this value of wheel camber is permanent to appropriate maximum value of television camera lens zoom coefficient. Shifts of extreme reading lines images are identified relative to central line, and camber is determined, steering wheel is installed in initial position, and wheel camber is adjusted.

EFFECT: simplified process of obtainment and application of information about shifts of optical target images.

3 cl, 3 dwg

FIELD: physics, measurements.

SUBSTANCE: device for measurement of angular and linear coordinates of object comprises illuminator, beam splitter and lens arranged along with beam direction, mark installed on object and matrix photodetector located in plane adjacent to object with unit of information processing. Illuminator is installed in focal plane of lens. Mark is arranged in the form of focusing mirror segment arranged on reflex surface. Besides focus distance of focusing mirror segment does not exceed value of lens displayed space depth.

EFFECT: creation of device for simultaneous determination of linear and angular coordinates of object with the help of single matrix photodetector, having wider range of angles measurement, small dimensions and simplified design.

4 dwg

FIELD: instrument making.

SUBSTANCE: optoelectronic sensor of angular position includes an intermittent light source, a photo-detector, made from nano-graphite film and two pairs of electrodes, and a device for processing electric signals, obtained from the mentioned electrodes. A thin coat of transparent wetting liquid with electrical conductivity far less than the nano-graphite film is applied on it. The liquid coat is hermetically sealed with a transparent lid, closely fitted to the liquid surface.

EFFECT: increase in the range of measured angles by the optoelectronic sensor of angular position.

2 cl, 3 dwg

FIELD: military equipment.

SUBSTANCE: device for the automated measurement of small angular displacement contains a laser, meant to be fastened with the object, mirror block made in the form of a semitransparent mirror, located in the path of the radiation from the laser, and located in the path of the radiation reflected by the semitransparent mirror from a totally reflecting mirror, at a distance, depending on the required accuracy of measurement, optically connected with the mirror block photosensitive device, made in the form of a linear photosensitive device with charge coupling (LPDCC), display unit, synchronising generator, two digital comparators, generator, metre, two triggers, OR element, two AND elements, NOR element, two analog-to-digital converter, two digital filters and two delay elements. In the plane of analysis appears the interference pattern, projected to the photosensitive region of the LPDCC, causing the appearance of video signals at the output of LPDCC, identically corresponding to the interference pattern. Video signals are converted into sequential digital code. Calculation of the measured value is produced by the apparatus; result of the measurement is shown on the indicator.

EFFECT: increase in interference resistance of the device.

2 dwg

FIELD: physics.

SUBSTANCE: reflex photoelectric angular displacement control system contains two light sources, reflector in the form of mirror plate with two opposite reflecting surfaces and fixed on torsion suspension, two-way electric circuit including two photodetectors, two amplifiers and matching computing unit. Light sources are mounted so that beams lie in plane perpendicular to torsion suspension rotation axis, move to reflector along the same straight line in reverse direction. And reflected beams lie in the same plane and move to associated photodetectors photodetecting planes of which are mutually parallel. Photodetectors generate voltage proportional to beam displacement on their photodetecting planes supplied to matching computing unit generating voltage proportional to difference of two voltages.

EFFECT: higher control accuracy of system angular displacement and vibration resistance, and extended applicability of proposed device.

4 dwg

FIELD: control-mounting systems.

SUBSTANCE: device has laser fixed in body, images forming device made in form of intersecting filaments. Body is made in form of hollow prism, provided with cone at the end. Upper portion of cone is combined with center of apertures provided in coordinate lines system. Body is mounted with possible angular displacements around aperture center. Forming device filaments are made non-transparent and fixed in frames inserted in system. Frames are placed with possible displacement independently from one another in direction perpendicular to filaments.

EFFECT: higher precision.

3 dwg

Up!