SU495644A1 - Device for software control, e.g. film projector - Google Patents

Description

The invention relates to the field of automation and can be used to control a film projector when showing films with a variable aspect ratio.

A device for software control of a film projector is known, which contains a servo drive connected via an actuator to an indicator unit and a comparison circuit made in the form of bit cells, each of which includes two amplifiers with read and display photodiodes connected to their inputs, respectively.

To improve speed, reliability and accuracy of work, the proposed device includes a block of command signals, the first output of which is connected to a servo drive, and a clock pulse generator associated with the second output of the block of command signals and a servo drive, and the comparison circuit contains in each bit cell two electronic switches whose inputs are connected via the voltage divider and isolating elements, for example diodes, to the outputs of amplifiers, OR elements connected to common points of readout photodiodes and ind katsii sootvetetvuyuschih cells and separation elements, such as diodes through which outputs are connected to electronic switches

with the first and second inputs of the command signal block, corresponding. The command signal block contains an indication photodiode, a trigger, a two-stage DC amplifier, a prohibition element, and a section 1 of the elements, for example, diodes. The trigger inputs are connected to the inputs, and the outputs are connected to the first outputs of the command block block. The photodiode of the indication is connected to the input of the first stage of the amplifier current, and to its output through the isolating dpoda there is a banning element, the input of which is connected to the inputs of the command signal unit through divider elements, such as diodes. The inhibit output is connected to the second output of the command module block, and the input of the inhibit element is additionally connected via a diode to the input of the second stage of the DC amplifier.

The clock driver contains a two-stage DC amplifier, a contacting element with a cam and separation elements, for example, dpods. The input of the first stage of the amplifier of a constant current and the switch to the coacting element with the cam, and the input of the second stage of the amplifier of a direct current is connected through a diode to the input of the clock pulse generator. The output of the dc filitel through the isolating elements, such as diodes, is connected to the output of the clock pulse generator.

The drawing is a diagram of the device oiiiicbiiiaeMoi-o.

The device contains a servo 1; executing mechanism 2; indicator unit 3; comparison circuit 4, consisting of bit cells 5, each of which contains amplifiers 6 and 7 with photodiodes 8 and 9, read and display, respectively, electronic switches 10 and 11 with separation diodes 12 and voltage divider 13, 14, elements 15 and separation diodes 16; 17 1 command signals, including flip-flop 18, a photodiode 19 of the indication, a two-stage dc current amplifier 20, separation diodes 21, an inhibit element 22 and an additional diode 23; shaper 24 clock pulses, which includes a two-stage amplifier 25 of a constant-current current, a contacting element 26, a cam 27, a diode 28 and separation diodes 29.

When the device is in operation, the program on the film is converted by the photodiodes 8 of the readout into electrical voltages, and the signals from the indicator unit 3 are converted by the photodiodes 9 of the display into electrical indications, characterization, and the position of the mechanical mechanism 2.

In the initial state, amplifiers 6 and 7 and electronic keys 10 and 11 are closed. Let, for example, in a new program on a kiolent tape, a photodiode 8 readout of the first bit cell is illuminated, and a photodiode 9 indicating the old position of actuator 2 is not illuminated. In this case, a voltage appears at the output of the amplifier 6, which seals the separating bottom 12. The part of the device from the filament source E, removed from the divider 14, translates the electronic switch 10 into the real state. The electronic key 11 is subject to the action of a part E of the divider 13 in a closed state. The pairing from the output of the key 10 through the element OR 15 enters the common point of the photodiodes 8 and 9, reading and indicating, respectively, the subsequent bit cells and thereby blocks them regardless of whether the photodiodes 8 and 9 are regenerated or not.

At the same time, the insertion from the output of the electronic key 10 through the separation bottom 16 advances one of the inputs of the trigger 18 and does not reset it to the corresponding stable state, so that one of the outputs of the trigger is closed and the other is open. The same voltage from the electronic key 10 through dividing diodes 16 and 21 sends a prohibition element 22, the output signal from which through diode 28 gives permission for the amplification of clock pulses in the driver 24. The cam 27 is rigidly fixed on the shaft of the projection of the film projector, so that the contacting element 26 is closed only at the moments of the standing of the film in the film channel when the reading of the program occurs. Therefore, at the time of film pulling the film does not coincide in time with the formation of clock names in the 24-format controller, which are output from the 25-power output of the 1N-south current through the separator JI 29 and OTKpbiTbUi output trigger and I rt4 Servodrive drive 1. Servoprvnad changes the additional mechanism 2 and the sensor position to the position, underestimated in the form of a new program on the film. At the same time, the position sensor passes all zero-key positions in the device. As a cell in an ordinary photodiode 9 Hii of the indication exerts a destructive effect, then the output voltage of the usnltel 7 transmits the separating diodes 12 and the divider 15, 14 is depleted, so that the electronic keys Yun 11 are closed. Once the blocking of the photodiodes of reading and indication is removed in the subsequent bit cells, a negative is given for comparing the CTeneiiH of the photodiodes of the reading of the display to the display in the second bit cell. With different illumination of these photodiodes, the device works on the same wiring scheme, and the same illumination gives permission to operate the third bit cell. Thus, the servo drive 1 moves the extra mechanics-m 2 to a predetermined programming position when the read and display photodiodes are lit ideologically. In this case, from the comparison circuit 4, the voltage doesn’t stand at the G / command signal unit, but the dummy element 22 returns to the initial state and shunts through the diode 28 the input of the second stage of the amplifier 25 of the nominal current. Servonnvod 1 is stopped, and the full mechanism 2 is fixed in a predetermined state program.

With the start of movement of the recovery mechanism 2, the photodiode 19 is turned on and the input of the amplifier 20 is of a constant current. The connection from the input of the second cascade of the amplifier 1 2 and the voltage through the diode 23 to the input of the element 22 is interrupted and duplicates the signals that come from the comparison circuit 4 through the separation diodes 21. At the same time, the output of the amplifier 20 blocks both the trigger 1b via the separation diodes 21, but the device It maintains the testing mode of the program read from the film prior to the installation of the actuator 2 at the next program position, when the photodiode 19 of the display is turned off and the mode of the device is determined by the degree of illumination of the photodiodes 8 and 9 readings and indications. This device self-locking mode also denys a single form of recording each program on a film, regardless of their alternation.

F o r p l1 of the invention

Claims (3)

1. A device for software control, such as a film projector, containing a servo drive, connected through an actuator with an indicator unit, and a comparison circuit made in the form of bit cells, each of which includes two amplifiers with read and display photodiodes connected to their inputs , respectively, characterized in that, in order to improve the speed, reliability and accuracy of the device, it contains a block of command signals, the first output of which is connected to the servo drive, and the driver The clock pulses associated with the second output of the command signal block and the servo drive, and the comparison circuit in each bit cell contains two electronic switches, the inputs of which through a voltage divider and separating elements, such as diodes, are connected to the outputs of the amplifiers, OR elements, readings and indications of corresponding cells connected to common points of photodiodes, and separation elements, for example diodes, through which the output of electronic keys are connected to the first and second inputs of the command signal block, respectively Twain. 2. The device according to claim 1, characterized in that the block of command signals contains an indication photodiode, a trigger, a two-stage DC amplifier, an inhibiting element and separation elements, such as diodes, the trigger inputs are connected to the inputs, and the outputs are connected to the first outputs of the command signal block, the photodiode of the indication is connected to the input of the first stage of the DC amplifier, and a prohibition element is connected to its output through separation elements, nagfimer diodes connected to the inputs of the block command signals, the output of the inhibit element is connected to the second output of the command signal block, and the input of the inhibit element is additionally connected via a diode to the input of the second stage of the amplifier with a constant current. 3. The device according to claim 1, characterized in that the clock pulse generator contains a two-stage DC amplifier, a contacting element with a cam and separation elements, for example diodes, the input of the first stage of the DC amplifier is connected to the contacting element with the cam; the input of the second stage of the DC amplifier is connected via a diode to the input of the clock generator pulses, and the output of the DC amplifier through the separating elements, such as diodes, is connected to the output of the clock impulses.