SU734702A1 - System for processing film information - Google Patents

Description

one

The invention relates to computing and can be used in nuclear physics for processing information contained in photographs of the tracks of elementary particles obtained in experiments on large bubble chambers.

A known system for processing film information comprising a computer, a reception register, a command register, a control unit, a current coordinate counter, a current coordinate register, a center search unit, a spurious signal detection unit, and an output register 1.

This system has insufficient accuracy and low productivity, as it allows one frame processing of only one film.

The closest in technical essence to the invention is a system that includes an optomechanical part, including a measuring table, a lens unit, an illuminator unit, a table-screen with an operator’s console and a trackball, a tape drive mechanism; electric movement of the measuring table, containing electric motors, electronic control units for electric motors; electric tape drive mechanism; electronic data processing units for film information and computer control. In this system, there is a possibility of additional occurrence when working in the mode of outputting the measuring table to a given point X.dra or when moving along the event track. This error is determined by the possibility of forming false counting pulses due to shaking of the platform of the measuring table as a result of application of external mechanical effects (vibration, shock) or due to uneven operation of the drive of the platform of the measuring table 2.

The disadvantages of the system include J the need for a continuous part of the computer in the process of separation by a software method of counting pulses coming into the computer from displacement sensors, and reading pulses entering the computer as a command to read the current event coordinate. This leads to the complication of information processing programs, requires additional expenditure of computer time and reduces, ultimately, performance. Application in the television system: about the equipment for receiving an increase (: 11; h) 6p / Keny of the frame section on the screen V1; ..: | cr; ntr6.1nogo device (monitor) complicates the system and, in addition, allows for the review of only a small portion of the frame, which complicates the work of the operator and forcing him when processing a frame to constantly move from the image of one scale image of a different scale, which leads to increased operator fatigue and increases the processing time of the frame. Used in the system for mixing the platform of the Measuring Table, the electric drive, made on direct current motors with printed windings, does not allow the platform to be moved along the coordinates with high accuracy, corresponding to its accuracy of the coordinate reference channels. The aim of the invention is to increase productivity, accuracy and ease of operation.

The goal is achieved by the fact that in a system containing a computer, two electric drives, a control unit for pneumatic elements and lighting, an optomechanical device that includes a tape recording unit, a light beamforming unit, a measuring unit, the first output of which is connected to the console through a block of interchangeable lenses the operator, the inputs of the Hoio meter unit are connected respectively to the outputs of the first electric drive of the tape-drawing unit and the light flux formation unit, whose input is connected to the output of the control unit neither pneumatic elements nor illumination, the input of the tape unit is connected to the output of the second electric drive, and a data processing device including a interface unit connected by two-way communications with a computer and a control unit which is connected two-way with a sensor signal receiving unit and A correction unit is inserted by the frequency signal generating unit, whose input is connected to the first output of the sensor signal receiving unit, the input of which is connected to the second output of the measuring unit of the optomechanical device. counting unit, time division of counting and reading pulses, brake signal generating unit, clock generator and electromechanical latch pitch, the input of which is connected to the first output of the brake signal forming unit, the second output of which is connected to the input of the first electric drive, and the input is connected to the generator output sync pulses, the input of the counting direction correction unit are respectively connected with the second output of the sensor signal receiving unit and the output of the device control unit data processing, the outputs of the counting direction correction unit are connected to the control inputs of the frequency signal generating unit, the inputs of the time separation unit of the counting and reading pulses are connected respectively to the system input and the first output of the sensor signal receiving unit, the control input of which is connected to the output of the counting separation unit and read pulses. The drawing shows a block diagram of the system.

It contains an optomechanical device 1 consisting of a measuring unit 2 with a film channel ensuring the fixation of the film in a certain position relative to the turret of the block of interchangeable lenses 3 and the unit 4 of forming light fluxes with a moving optical element in a condenser, an operator console 5 with a trackball and of the tape unit 6. The electric drive 7 for moving the measuring table of the block 2 consists of direct current motors 8 connected to motor control unit 9, which are connected to gears via gearboxes The frames from the measuring table of the block 2. The electric drive 10 is designed to fast forward or rewind either one of three or simultaneously all three photographic films located in the film channel of the measuring table of the block 2. The control elements 11 for pneumatic elements and lighting are associated as with pneumatic elements. , providing vacuum presses of photographic films and blowing capstan of the tape unit 6, and with block 4, designed to form light fluxes, translucent films, located on the measuring table of block 2. Device during 12 intended for processing film information data and comprises a block 13 interfacing, b.tok 14 control unit 15 receives sensor signals and generating unit 16 of frequency signals. The electronic computing machine (computer) 17 is connected via unit 13 to control unit 14.

The system also includes an electromechanical latch 18 of the pitch, a clock generator 19, a brake signal generation unit 20, a counting direction correction unit 21, and a unit 22 for dividing the counting and reading impulses. 5 The system is designed for alternately processing three films simultaneously on a block on the measuring table of the block, each of which shows one of the three projections of the event recorded with any of three cameras mounted on the bubble chamber.

The operator, who is in the processing of film information behind the operator's pulse 5, using commutating elements located on the operator's console, sets the illumination of the desired projection, affecting through block 11 to block 4 the formation of light fluxes. Unit 4 contains a movable optical element of the condenser in the channel for shaping the light of the Boro stream, which transmits the film, which allows to maintain a constant illumination and image quality of the frame observed by the operator when changing the frame magnification of the frame image. The system allows you to observe a frame image at a magnification of 16 and 70 times. Using the trackball (displacement ball) located on the console 5, the operator, acting on a system of pulse displacement sensors (not shown in the drawing) associated with the electric drive 7, can move the platforms of the measuring table of the unit 2 in two coordinates in the horizontal plane, choosing This is his area of interest. The system can operate in automatic mode with computer control operating according to a given program. In this case, the measuring table of unit 2 moves along both coordinates to specified points of the frame, for example, along reference crosses, or moves in auto-tracking mode along the elementary particle track of interest fixed on photographic film. In this mode of operation of the computer, according to a given program, it outputs in the form of a binary code information about the magnitude, direction of movement of the measuring table of unit 2 along the coordinates and a series of control information signals. Through the interface unit 13, the information enters the control unit 14, in which service command signals are generated to ensure the normal functioning of the individual nodes and the system as a whole. The code information obtained through the control unit 14 of the block 16 is processed in this block into frequency signals from the engine control unit 9 for moving the platforms of the measuring table of the block 2. When moving the platforms of the measuring table from the diffraction pulsed linear displacement sensors, the signals arrive at block 15 and after it, into block 16. Block 16 contains reversible binary counters with the possibility of parallel recording of information, in which the code unit for moving the measurement platforms The table of block 2 is entered simultaneously in all bits from the control block. The counters of block 16 operate mainly in the subtraction mode of the pulses from them entered in block 15. The counting direction correction block 21 performs in the processing mode of a given setpoint of movement along each coordinate constant monitoring of two parameters, a signal of a given direction of motion, and a signal Carry information about the actual movement of the platform, arriving when the platform moves from block 15. In the case of the accident, if: 1 these signals are identical in their meaning, each pulse; npisxo, which is connected to the counting input of the LG counter: coordinates, shortens the contents of the account, i.e. the counter operates in the zychi mode; .:. nor, if. for example, due to extraneous mechanical effects (vibrations, uneven operation of the drive, etc.), the platform is in kak; The moment is shifted in the direction opposite to the given one, then the counting direction correction circuit switches the counter to operation in the addition mode and the counting pulse generated at this moment increases the counter content. When restoring the platform movement mode in accordance with a given direction, a pulse is formed, which, due to the effect of the correction circuit, is subtracted from the contents of the counter. Thus, when the platform returns to the position in which it was before the appearance of extraneous mechanical effects, the contents of the counters return to the true value, i.e., due to the action of the correction unit, the possibility of errors caused by extraneous mechanical effects on the measuring platform is eliminated. the table. When issuing data on the coordinates of the track points of events of interest, the numerical value of the coordinates in the form of binary codes is transmitted to the computer from the registers of block 15, into which information is entered from the reversible counters of block 15 by a signal "Read from the operator or at the initiative of the computer. The "Read" signal can practically appear at any time, i.e., even when the next counting impulse from the diffraction sensors of movement of the measuring table of the unit 2 arrives at the counter, and the counter is in transient mode. In this case, erroneous information may be written to the registers from the counters. The time separation unit 22 of the counting and reading pulses excludes the possibility of registering erroneous information in registers, separating the counting and reading pulses in time when they coincide, and ensures that information is read from the counters only when they are in a static state. To move the measuring table of the measuring table of the unit 2 is used)) DC motors 8 are driven, the control unit of which will receive pulsed signals from block 1b or from the trackball pulse sensors. When applied to the motors 8, the supply voltage from the control unit 9 after moving the platforms; for a distance equal to the discreteness of the step (± 2.5 µm), the generator 19 of the sync pulse produces a signal that is applied to the brake signal formation unit; 1l. From block 20, the blocking signal enters control unit 9, as a result of which the supply voltage is removed from the engines 8 and their pulling force disappears, and, in addition, the signal from block 20 enters the electromechanical latch 18 of the pitch, which has a gear rotor connected kinematically with movement mechanisms of the measuring table platforms. As a result of the action of the lock of the schaga, the platform is placed in the position corresponding to the displacement by an amount equal to the discreteness of the schaga.

When moving platforms over large distances with maximum speeds, the impact on the engine control unit 9, the brake signal generation unit 20 and the electromechanical lock 18 of the rod 18 is excluded. When approaching a given point of the frame, the movement speed decreases and the electric drive goes back to the above described pulse control mode.

The principle of pulse-analog motor control of the platforms of the measuring table of the block used in the system allows the use of a large range of speeds and a small discreteness of the junction circuit.

Claims (2)

1. USSR author's certificate number 506848, cl. G 06 F 3/04, 1974. 2.J. Altaber About., ADAM + EVA, and Universal Seanniiig and Measuring Machine for Rim from the large Bubble Chambers. CERNDATE, HANDUNG DIVISION, DD / DN / 70/7, (prototype).