RU2243581C1 - Method and device for monitoring information control channel - Google Patents

Abstract

FIELD: instrumentation engineering; assembly, guidance, and beam control of information transfer systems including alignment of radiation beam and information control channel axes.

SUBSTANCE: proposed method includes division of light beam arriving from item under check into two light beams, generation of first light beam pattern in focal plane of first lens, and generation of second light beam pattern in focal plane of collimator at the same time visualizing first light beam pattern on video monitor; parameters of information control field are checked by optoelectronic method, second light beam is analyzed, and values are recorded. Device implementing this method has first lens optically coupled with video monitor, beam divider, and collimator incorporating second lens that mounts dot calibration diaphragm on its focal plane optical axis, photodetector connected to coordinate computing unit and to first input of recording device whose second and third inputs are connected to first and second outputs of coordinate computing unit, respectively, beam divider being optically coupled with first lens. Proposed method and device are distinguished by high-precision check for linear and angular misalignment due to precise evaluation of light spot energy center of radiation beam in information control field, precise evaluation of information center, and precise evaluation of offset of information control field propagation axis with respect to information control channel axis for different scale of pattern.

EFFECT: enhanced precision of monitoring for linear and angular misalignments.

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Description

The invention relates to the field of instrumentation, for monitoring the parameters of the information control channel (IKU) during their assembly, alignment, testing and repair, in particular for centering the axis of the radiation beam with the axis of the IKU. IKUs are used in information transmission, guidance and beam control systems.

IKU forms a modulated beam of radiation, which is a control information field (ISP) on the entire trajectory of movement and tracking of the object. The IKU includes an emitter with an opto-mechanical system for introducing radiation into the modulator unit, which includes the first adjustment element that allows linear displacement of the radiation beam within the information square of the IEP, and the second adjustment element that allows the information square to be offset with the radiation beam with respect to to the axis of the IKU, which corresponds to the angular alignment of the axis of propagation of the ISP with the axis of the IKU by combining the axis of the radiation beam with the axis of the IKU. The modulator unit includes a projection optical system, a raster, a wrapping system, and a pancratic system. The IPA formed by the control information channel is a modulated radiation beam. The IPA is formed as follows: the radiation beam of the emitter unit illuminates one of the raster code tracks, then the projection optical system projects the illuminated zone of this track onto the second raster track. The intersection point of the axis of the first track of the raster and the axis of the second track of the raster is nominally located on the axis of the pancratic system, and the superimposed images of the first track on the second track form an information square, within which, when the raster is rotated, control signals are generated in accordance with the modulation law in the form of a sequence of optical pulses, containing information on the angular direction of propagation of the ISP by the linear deviation of the modulated radiation beam in two planes perpendicular to spreading distribution. The modulated radiation beam enters the pancratic system, which changes the image scale according to a given law, moving the moving components of the pancratic system from the initial to the final position, ensuring a minimum displacement of the propagation axis of the IPA relative to the axis of the IKU. Such systems are used in devices described in [1, 2].

Thus, a light beam limited by raster code paths representing an information square, within which a modulated light beam representing a control information field is enclosed, is received at the output of the IKU; moreover, the dimensions of this control are changed in accordance with the sequence diagram of the pancratic system, which keeps the size of the control on the entire propagation trajectory during the movement of the accompanied object.

A known method for monitoring the information control channel (IKU) [3], based on the image formation of the information control field (ISU) IKU in the focal plane of the lens at the initial position of the components of the pancratic system, followed by visualization on a video monitoring device, while the image of the IUP consists of an information image the square and the light spot of the radiation beam, performing visual alignment of the geometric centers of these images to obtain a symmetrical picture, remembering The positions of this geometric center of the IPA light spot, when moving the moving components of the pancratic system, determine the displacement of the geometric center of the IPA by eye relative to the previously remembered, and also observe the size of the information square, the shape change and the presence of cutting the light spot of the radiation beam passing through the modulator block for different image scales.

Closest to the proposed invention is a device for controlling the input of radiation into the modulator unit [3], containing a scattering screen mounted at a certain distance from the IKU of the controlled device, a lens that is optically paired with a video monitoring device (VKU). This device allows you to observe the generated image of the IKU and its boundaries on the scattering screen using a lens and a VCU, use the first IKU adjustment element to linearly shift the radiation beam in the information square in two coordinates, achieving symmetrical filling, thus performing linear decentration, remember the geometric center IPA images for the initial position of the moving components of the pancratic system. When translating the moving components of the pancratic system to the final position, they observe at VKU the displacement of the stored geometric center and the change in the shape of the image of the IPA formed on the scattering screen. Using the displacement of the geometric center and the change in the shape of the image, the control unit is used to judge the angular decentration of the radiation beam in the IKU and, using the second IKU adjustment element, achieve angle alignment for the final position of the moving components of the pancratic system. The displacement of the geometric center of the IPA is proportional to the angle of inclination of the axis of the radiation beam to the axis of the pancratic system.

The known device provides the ability to observe the dimensions of the information square for different positions of the components of the pancratic system, makes it possible to assess the absence of cutting of light beams with the frames of the optical elements of the modulator unit and visually control the angle of inclination of the axis of the modulated radiation beam to the axis of the pancratic system, which is the angle of mismatch between the propagation axis of the IPA and IKU.

A disadvantage of the known method and device is the low accuracy of control of linear decentration associated with the visual determination of the geometric center of the light spot of the radiation beam, the visual determination of the geometric center in the image of the information square and the subsequent combination of these centers to obtain a symmetric picture, and the low accuracy of the control of the angular decentration of the radiation beam in IKU, associated with the visual determination of changes and assessments of the position of the geometric center of the IPA at moving the moving components of the pancratic system for different scale of images relative to the stored geometric center of the IPA, while the shift of the center of the IPA relative to the stored reflects the angle of mismatch of the axis of propagation of the IPU to the axis of the IKU, the increase of which leads to the cutting and shifting of the output image of the IPU formed by the IKU.

The objective of the invention is to increase the accuracy of control of linear and angular decentration due to the exact determination of the energy center of the light spot of the radiation beam in the IPA, the exact determination of the information center of the IPU, the exact determination of the displacement of the axis of propagation of the information center of the IPA to the axis of the IKU, corresponding to the angle of mismatch of the axis of the beam of radiation to the axis of the IKU when moving the moving components of the pancratic system.

To solve the problem in the method for monitoring the information control channel (IKU), which includes the formation at the initial position of the moving components of the pankratic system image of the control information field (IPA) of the monitored product in the focal plane of the first lens with subsequent visualization on a video monitoring device, while the IPA image is simultaneously consists of an image of the information square and the light spot of the radiation beam, visual alignment of the geometric centers of these images to obtain a symmetric picture, observing the dimensions of the information square, changing the shape, the presence of cutting and shifting the light spot of the radiation beam that passed through the modulator block at intermediate and final positions of the moving components of the pancratic system, in contrast to the prototype, the light beam of the IPA of the controlled product is divided into two light beam and simultaneously with the image formation of the first light beam in the focal plane of the first lens in the initial position of the moving components in the pancratic system, an image of the second light beam in the focal plane of the collimator is formed, a calibrated diaphragm located on the optical axis of the collimator is isolated, the point light flux from the IPU, which is converted into an FPU into an electric signal in the form of a voltage U _p , reflecting the value of the light flux transmitted through the calibrated diaphragm is processed in the BVC to obtain the voltage values U _Z and U _Y proportional to the displacement of the calibrated diaphragm from the center of the IPU in two coordinates Z and Y, combined They keep the IKU axis with the collimator axis to obtain zero values of U _Z0 and U _Y0 , which correspond to the center of the IPA, then combine the energy center of the light spot of the radiation beam with the center of the IPU by shifting the light spot of the radiation beam within the information square to obtain the maximum value of the light flux intensity U _pmax passing through a calibrated diaphragm, moving the moving components of the pancratic system from the initial to the final position, we obtain a sequence of values U _Zi , U _Yi , reflecting in time, the dynamic displacement of the center of the IPA in the corresponding coordinates relative to the axis of the IKU and proportional to the corresponding angles of mismatch of the axis of propagation of the IPU for the corresponding positions of the moving components of the pancratic system, fix the values U _Z , U _Y for the final position of the moving components of the pancratic system and perform angular alignment of the axis of propagation of the IPU with the axis IKU by bringing the voltage values along the coordinates Z, Y to zero values U _Z0 , U _Y0 by shifting the axis of the radiation beam along the angle.

To solve the problem, in the device for monitoring the information control channel, containing the first lens, optically paired with a video monitoring device, in contrast to the prototype, optically coupled beam splitter and collimator are introduced, containing the second lens, in the focal plane of the optical axis of which there is a calibrated point aperture, photodetector device (FPU) connected to the coordinate calculation unit (BVK) and the first input of the recording device, the second and third inputs of which are connected respectively, with the first and second outputs of the BVK, while the beam splitter is optically coupled to the first lens.

The introduction of a beam splitter located in the common optical path into the device divides the light beam from the IKU into two beams and, using a collimator including a second lens and a calibrated diaphragm, forms an IPA image in the focal plane of the second lens, where the obtained image of the information field is detected by the light flux intensity passing through a calibrated diaphragm, with conversion to FPU with obtaining on the recording device the intensity value in the form of voltage U _p and subsequent processing it in the BVK performing demodulation with obtaining on the recording device the values of the offset of the calibrated diaphragm from the center of the IPA in two coordinates in the form of voltage U _Z , U _Y , which are used to refine the alignment of the energy center of the radiation beam along the maxim U _pmax with the center of the information square Z ₀ , Y _0, corresponding to zero values of U _Z0, U _Y0, that accurately identify and correct linear decentring by combining radiation beam axis with the axis of the ICU, and for moving the movable components Pancratic System in end position analyze the received values U _Z, U _Y, and via the second adjusting element, responsible for the shift in the angle of the radiation beam in the radiation system input unit ICU modulator achieve as uniform values U _Z0, U _Y0 and of the final position of movable components of the pancratic system, accurately determining and eliminating angular decentration.

The inventive method and device provide, along with visual determination of the geometric center of the light spot of the radiation beam, visual determination of the geometric center of the information square, observation of the dimensions of the information square and the presence of cutting and displacement of the light beam of radiation transmitted through the modulator block, to process and accurately determine the information center of the IPA in an optoelectronic way from the values U _Z, U _Y, to accurately determine the energy of the radiation beam center U _pmax value and combine x, as well as during IKU operation, in accordance with the algorithm for moving the moving components of the pancratic system, accurately determine the dynamic displacement of the ISP for different scale of the ISP images by the offset of the IPU information center, which consists in recording the offset of the intersection of information zero along each of the raster tracks corresponding to the center of the information square relative to the axis of the IKU and which reflects the value of the mismatch angle of the axis of propagation of the ISP to the axis of the IKU when the moving components of the pancratic system move s, while the values of the coordinates of the location U _Z , U _Y do not depend on the intensity of the light flux. The use of the method and device allows for efficient and accurate control of the linear and angular decentration of the axis of the radiation beam passing through the modulator unit to the axis of the IKC for different positions of the components of the pancratic system, using the value of the angular decentration to estimate the value of the mismatch angle of the propagation axis of the IPA to the IKU axis when moving components of the pancratic system, corresponding to the angle of inclination of the axis of the radiation beam to the axis of the IKU, and to obtain the value of the light flux intensity, Sheha through a calibrated aperture.

The essence of the method for monitoring IKU and a device for its implementation is illustrated by drawings.

Figure 1 shows a block diagram of a device for monitoring IKU; figure 2 shows the image of the IPA, consisting of a frame window and a light spot of the radiation beam; figure 3 presents a graph reflecting the dependence of the displacement of the diaphragm on the center of the IPA in two coordinates, and a graph of the distribution of the intensity of the light flux passing through the calibrated diaphragm in the generated IPA.

The device for monitoring IKU (Fig. 1) includes a beam splitter 1 made in the form of a plane-parallel plate, optically paired with a first lens 2, in the focal plane of which a video monitoring device 3 is installed, and a beam splitter 1 is optically paired with a collimator 4 containing a second lens 5 , in the focal plane on the optical axis of which a calibrated diaphragm 6 is installed, optically coupled to a photodetector 7 (FPU), the output of which is connected to the coordinate calculation unit 8 (BVK) and the first input p a recording device 9, the second and third inputs of which are connected respectively to the first and second outputs of the BVK 8. Figure 1 also shows a controlled IKU 10, which can be represented as part of a guidance device or beam control system, including an optically coupled emitter 11 forming the radiation beam, the first alignment element 12, which linearly displaces the radiation beam within the information square (linear decentration), the second adjustment element 13, which angularly displaces the axis of the radiation beam with respect to the optical axis of the modulator unit 14 in the IKU (angular decentration), corresponding to the alignment of the propagation axis of the IED with the IKU axis.

FPU 7 is a photodetector based on a photodiode type FD141K and an amplifier. The photodetector is designed to receive modulated laser radiation and convert it into an analog electrical signal in the form of a voltage corresponding to the intensity of the light flux passing through a calibrated diaphragm.

BVK 8 performs time-pulse demodulation of a light beam transmitted through a calibrated diaphragm to obtain coordinate values in the form of an analog signal corresponding to Y and Z coordinates. As a FPU with BVK, a 9N244 brand unit is commercially available.

As a recording device 9, a three-channel oscilloscope can be used.

A device for monitoring the information control channel works as follows.

The emitter 11 generates a beam of radiation with a small angle of divergence, which is introduced using the first alignment element 12, and then the second alignment element 13 into the modulator unit 14, in which both code tracks of the rotating raster represent a field diaphragm that performs time-pulse modulation passing through the block modulator 14 of the radiation beam, falls into the pancratic system, which forms and zooms in according to the required law by moving the moving components of the pancratic system we are from the initial to the final position.

The generated IPA, which is modulated radiation, is analyzed by an IKU control device, where a beam splitter 1, located in the common optical path, divides the light beam from IKU 10 into two light beams, the image of the first beam using the first lens 2 is formed on a video monitoring device 3 for visual analysis of the input of the radiation beam of the emitter 11 into the modulator unit 14 according to the generated IPA image, which is shown in figure 2, where the image of the light spot of the radiation beam is shown in the form of a circle, and siderations information is shown as a square of a square. When visually observing the image of the ISP, a symmetrical image of the radiation beam and the information square is obtained by moving the first alignment element 12 by performing preliminary linear decentration. At the same time, the second beam enters the collimator 4 and its image by the second lens 5 is formed in its focal plane, in which the calibrated diaphragm 6 is mounted on the axis. The spot light flux passing through the calibrated diaphragm 6 carries information about the location in the IPA and enters the FPU 7, which is converted into an electrical signal and transmitted to IOO 8. The light flux caught in PD 7 is converted into an electric signal, amplified and outputted as the voltage U _p, the reflection intensity value CBE ovogo flow passing through the calibrated orifice 6, to a first input of the recording device 9 and to IOO 8 for processing and demodulation to obtain on the recording device 9, the voltage values U _Z and U _Y, proportional to the displacement of the calibrated aperture of IMPs center in two coordinates Z, Y The voltages U _Z and U _Y corresponding to the two coordinates Z and Y are a function of the displacement parameters and depend on the modulation used in beam control systems, which can be represented as a function of the displacement of the diaphragm relative to the center of the IED :

U _{Y (Z)} = f (l _{Y (Z)} ),

where l _{Y (Z)} is the offset relative to the center at the corresponding coordinates of Z and Y, mm;

U _{Y (Z)} is the received voltage at the corresponding coordinates of Z and Y, V.

Typically, in systems of automatic tracking of moving objects, modulation is applied with a linear dependence of the change in voltage at an offset from the center of the IPU, which can be represented in the form of a graph shown in Fig. 3 and described by the formula:

U _{Y (Z)} = k (l _{Y (Z)} ),

where k is the coefficient of proportionality.

To eliminate linear and angular de-alignments, it is necessary to combine the IKU axis with the axis of the collimator 4. This combination can be done, for example, by moving the collimator to obtain zero values of U _Z0 and U _Y0 , which correspond to the alignment of the center of the IPA with the center of the hole of the calibrated diaphragm 6 at the initial position of the moving components pancratic system. Then, the energy center of the light spot of the laser radiation beam is determined by shifting it within the information square to obtain the maximum intensity of the light flux U _pmax passing through the calibrated diaphragm 6 to clarify the alignment of the energy center of the light spot of the radiation beam with the center of the information square with the values of U _Z0 , U _Y0 with simultaneous visualization of the image on the video monitoring device 3, which corresponds to linear decentration. Next, the moving components of the pancratic system are moved to the final position, and on the video monitoring device 3, the sizes of the information square, shape change, the presence of cutting and the shift of the light spot of the radiation are observed. Also, on the recording device 9, a sequence of values of U _Zi , U _{Yi is} obtained, which reflect the dynamic time shift of the IPA image formed in the focal planes of the first 2 and second 5 lenses for different image scales. The level of signals U _Zi , U _Yi received on the recording device 9, judge the angular change in the direction of the axis of propagation of the IPA in time, corresponding to the angular decentration for different positions of the moving components of the pancratic system. The values of U _Z , U _{Y are fixed} for the final position of the moving components of the pancratic system and by moving the second alignment element 13 of the ECI, the angular alignment of the IPA propagation axis with the axis of the ICU is performed, achieving zero values of U _Z0 and U _Y0 for the final position of the moving components of the pancratic system.

The proposed technical solutions for monitoring the control information channel are currently implemented. The operation of the device in accordance with the claimed method showed its high efficiency, because It retains all the advantages of existing similar devices and greatly facilitates operation and at the same time improves the accuracy of control and alignment of the alignment of the axes of the emitter and the modulator unit, allows you to quickly assess the angle of mismatch between the axis of propagation of the ISU and the axis of the IKU throughout the movement of the moving components of the pancratic system.

Sources of information

1. Sight guidance device 1K13. Technical description and operating instructions 1572.00.00.000 TO TSKB "Peleng", 1987

2. Patent RU 2108531. Sight guidance device, publ. 04/10/1998, bull. No. 10.

3. The visualization system of filling the radiation beam of the frame window of the product 1K13. Technical description and operating instructions LO137.00.00.000TO, OJSC "Peleng", 1997 - prototype.

Claims (2)

1. The method for monitoring the information control channel (IKU), including the formation at the initial position of the moving components of the pan-graphic system image of the control information field (IPA) of the controlled product in the focal plane of the first lens, followed by visualization on a video monitoring device, while the image of the IPA simultaneously consists of an image information square and light spot of the radiation beam, visual alignment of the geometric centers of these images to obtain symmetry egg picture, observation of the size of the information square, shape change, the presence of cutting and shifting of the light spot of the radiation beam that passed through the modulator block at intermediate and final positions of the moving components of the pancratic system, characterized in that the light beam of the control device is divided into two light beams and simultaneously with the formation of the image of the first light beam in the focal plane of the first lens in the initial position of the moving components of the panocratic system, I form image of the second light beam in the focal plane of the collimator and emit a calibrated diaphragm located on the optical axis of the collimator, the point light flux from the IPU, which is converted into an FPU into an electrical signal in the form of voltage Up, reflecting the value of the light flux transmitted through the calibrated diaphragm, is processed in BVK with obtaining values of voltages U _Z and U _Y proportional to the displacement of the calibrated diaphragm from the center of the IPA in two coordinates Z and Y, combine the axis of the IKU with the axis of the collimator to obtaining zero values of U _ZO and U _Y0 , which correspond to the center of the IPA, then combine the energy center of the light spot of the radiation beam with the center of the IPU by shifting the light spot of the radiation beam within the information square to obtain the maximum intensity of the light flux U _pmax passing through the calibrated diaphragm, moving the moving components of the panocratic system from the initial to the final position, they obtain a sequence of values U _Zi , U _Yi , reflecting in time the dynamic displacement of cent In accordance with the corresponding coordinates relative to the axis of the IKU and proportional to the corresponding mismatch angles of the axis of propagation of the IHP for the corresponding positions of the moving components of the pancratic system, the values U _Z , U _Y for the final position of the moving components of the pancratic system are fixed and the angle of alignment of the axis of propagation of the Ipu with the axis of the IKU is adjusted voltages along the coordinates Z, Y to zero values U _Z0 , U _Y0 by shifting the axis of the radiation beam along the angle. 2. A device for monitoring an information control channel, comprising a first lens optically coupled to a video monitoring device, characterized in that an optically coupled beam splitter and a collimator are introduced, comprising a second lens, in the focal plane of the optical axis of which there is a calibrated point aperture, photodetector (FPU ) connected to the coordinate calculation unit (BVC) and the first input of the recording device, the second and third inputs of which are connected respectively to the first and second th outputs of BVK, the beam splitter is optically coupled to the first lens.

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