RU1793421C - Device for automatic choosing frame in diascope - Google Patents

Abstract

Usage: projection equipment. SUMMARY OF THE INVENTION: a rotor of a sine-cosine rotary transformer 10 is strengthened in a device on the same axis as a dealership 7, the voltage from the stator circuits of which is rotated through a quadrant switch 13, a comparative device 14, a demodulator 15, a filter 16; the key 17 and the amplifier 18 is supplied to the engine 9, connected to the diesel store 7 through the gear 8. The control signal of the frame change mechanism 1 is generated from the signals from the output of position sensors 2 and 3 and from the signal from the output of the zero-organ 11 using logic circuits 12 , 4, 5, 6, The quadrant switch 13 and the comparator 14 are controlled by a code from the output of the control panel 19. 2 ill.,

Description

The invention is made to projection technology, / YK-.;. ::.: I: -: v.v-, H - ;;:.

A device is known for automatically selecting a frame (transparency) in a projector, containing a master for selecting the desired group I Di; ap () ztiv6v, a shaper of binary signals about a group of transparencies in the working position, a circuit forming a signal for setting an i-ro transparency , a converter that turns off the motor when the signals of the driver and Shaper 1. match. ... the r-disadvantage of the device lies in its complexity. Ts; -;:; At V.y:; ;. .., - ..

The closest technical solution to the invention is a device for high-definition video capture in a Slide projector, containing a remote control, signal devices in and out of the camera for a signal signal from the beginning and end of a diamond Microprocessor. Without a device for controlling, through the voltage-forming unit, the operation of the uiuardir engine moving diamagazine 2.; .Ј i; -H; -: W

A disadvantage of the device is its complexity, which consists in the presence of phRTO sensors, a computer and a stepper motor with its control circuit; : ,,;:

The purpose of the invention is the simplification of the DESIGN, - ;: -: / G: .., v ::::; ; :: D: ..

 The goal is achieved by that; that a device for automatically selecting a frame in a slide projector containing a control panel, a diamaz shop connected to a frame change mechanism associated with the input sensors of the source and last sensors thereof, as well as an amplifier connected to a motor coupled through a gearbox with a diamazine, are consequently introduced connected quadrant switch, a comparator, a demodulator, a filter and a key connected to an amplifier input as an output, as well as a series-connected zero-organ and an inverter, three circuits 2 AND NOT AND a sine-cosine the rotary rotating transformer whose rotor is connected to the axis of the diamagazine, the rotor winding is connected to the mains voltage, and the stator windings are connected to the input of the square switch, and the outputs of the sensors of the initial and extreme positions of the frame change mechanism are connected to the first inputs of the first and second circuits, respectively 2I-NOT, the outputs of which are connected to the inputs of the third circuit 2I - NOT, the output of which is connected to the control inputs of the frame and key changing mechanism, while the input of the zero-organ is connected to the circuit between the output

filter and an analog key input, and the zero-organ output is connected to the second input of the second 2I-NOT circuit, the inverter output is connected to the second input of the first 2INE circuit, the outputs of the two high-order bits of the Control Cult are connected to the digital inputs of the quadrant switch, and the outputs of the lower-order bits The remote controls are connected to the digital inputs of the comparator.

In FIG. 1 shows a block diagram of a device; in FIG. 2 - timing charts.

The device comprises a frame change mechanism 1; sensor 2 of its initial position,

sensor 3 of its extreme position, circuits 2I-NOT 4,5 and 6, diamage 7, gearbox 8, Engine 9, sinus-red sine rotational t | 5analyzer 10, zero-organ 11, inverter 12, chirter 101 quadrant,

comparing device 14, demodulator 15, filter 16, key 17, amplifier 18, remote

19 Distances ; :

Diamagazine 7 contains hfi transparencies, p spb / 1st yen riib, of the circle of the diamagazine in cells, each of which occupies a sector of $ 306 / t degrees. The axis of the Diamagazine i is connected to the rbtr of the sine-oblique rotary transformer 10, included in the angle sensor mode, when

its rotor winding is connected to the voltage of the network U Um s | n ft) t, where Um is the maximum amplitude; circular frequency. The device operates as follows /:; /; v ,: -.Ч:.; .-:.: Г. .: ... .

from the origin () to the time ti (figure 2) on the remote 19

digital binary code selected

Ni yrrtia c, corresponding to rrit transparencies.

At its output, the angle u is represented as

sum of two angles y and ifa.

SI y | +,.,

where y is the angle represented by the two highest n and n-1 bits of the NI code with the price of the bits 180 and 90 °, respectively; therefore, the angle 71 can have a value from zero to 360 ° with a resolution of 90 °; t / i is the angle represented by the least significant bits 0 - (n-2) of code N1, which can have a value from zero to

90 ° with a resolution of 360 / t.

From the output stator windings of the sine-cosine rotary transformer 10, the voltage Usi U-sln p is supplied to the analog input of the switch 13

quadrants and Dei U cos p, where p is the angle of rotation of the diamagazine. At the output of the switch 13 quadrants, the voltage Usi and Del under the action of p and p-1 high-order bits of the NI code coming from the output of the remote control 19 to digital

the inputs of the switch are 13 quadrants, reduced to the first quadrant and the voltage at its output.

U s | U -sinfyJi -yi); U C U -cos (pi -yi).

I The interfaces U si and U ci are fed to the analog input of the comparator 14, the digital input of which receives the angle code ip in the form of low-order bits of code N from the output of the remote control 19. At the output of the comparator 14, a voltage UCyi is generated proportional to the sine of the differences of two angles: the angle f - yi, represented by the voltages U si and Del, and the angle represented by the lower-order bits of the code N:

Ucyi U-sln (pi-yi - $).

-U-sin (yes -en) ... .. (2Ш „

. ..- :. - - ... -. -. ; .:.

This voltage is demodulated by the demodulator 15 and smoothed by a filter .16, at the output of which the voltage Usi U-sin is generated (yes "О, where 0 is the DC voltage, Since the diamagnet is rotated by the angle yes -eg, then the voltage Ua 0, the potential at the output of the null organ 11 is low, and at the output of the inverter 12 is high. The low potential at the output of the sensor 2 will be only if there is a transparency in the viewing window when the code change mechanism 1 is in its original position. will be in the presence of a transparency in the diamage when The mechanism for changing the frame 1 is in the extreme position (Figs. 2 a and 2 b). In other cases, the potentials at the output of sensors 2 and 3 are high. Therefore, in the interval from O to c, the voltage Ui has a low potential, U2 is high, Us - low, 1/6 - high, U - low (Fig. 2). The frame mechanism 1 is in the initial position and is stationary, the key 17 is open, the voltage 11c does not pass to the input of the amplifier 18, the voltage Ue at the input of the amplifier is zero , engine 9, and hence diamagazine 7, are stationary. The range change begins at time ti by dialing on the remote control 19 the code NI + I, which corresponds to the angle sc + i and mi + 1 transparency. At the exit

the comparator 14 and the filter 16 there is a mismatch voltage:

out of 1. U sin (p - u + i)

(3)

10

5

0

5

0

5

0

5

0

different from zero, therefore, at the output of the null organ .11, the potential becomes high, and at the output of the inverter 12 it becomes low. As a result, at the output of the 2I-NOT 4 circuit, the potential U becomes low / and at the output of the 2I-NOT 4 circuit, the potential Uy becomes high and the frame change mechanism 1; having captured the mi transparencies, it sets in motion, moving the ml transparencies to the diamagazine. At time t2, at the output DI, the potential Ui becomes high, since the mi transparency is removed from the projection Window, and at the output of the sensors, the potential Lfe continues to be high, since the mi transparency has not yet been returned to its cell. At time ts mi, the transparency is returned to its cell in the diamond store 7, at the output of the sensor 2, the potential U2 is set low, the frame change mechanism 1 is stopped, the key 17 is closed, and the input voltage Tsn-g is applied to the input of the amplifier 18. The engine 9 through the gearbox 8 drives the diamond 7, delivering tn-1 transparencies to the shift mechanism 1, and depending on the sign of Pzi-i in the shortest arc,

At time t4, the diamagine unfolds at a yes-I angle, the transparency is set against the frame change mechanism 1, and the voltage is ex-1. becomes equal to zero:

U3I + 1 U sln (p -f i - cq + 1) 0.

since f + ac + i.

The potential U at the output of the 2I-NOT 6 circuit becomes high, the frame-change mechanism 1, capturing mi + 1 transparency, starts to return to its original state, before-: putting mi + 1 transparency in the projection window. Key 17 opens.

At time ts, a high potential is established at the output of the sensor 3, indicating that mi + 1 transparency has been removed from the transparency. At time t.6, a general-purpose transparency is installed in the projection window, low potentials are established at the output of the sensor 2 and the 2I-NOT 6 circuit, the frame change mechanism 1 stops, the key 17 closes. Changing the transparency is completed.

Claims (1)

SUMMARY OF THE INVENTION A device for automatically selecting a frame in a Slide projector, comprising a control panel, a diamaz shop connected to a frame change mechanism connected to inputs of sensors of its initial and final position, and also an amplifier connected to a motor coupled through a gearbox with a diamazine on the basis of the fact that, with. In order to simplify the design, a sequentially connected quadrant switch, a comparator, a demodulator, a filter and a key connected to the amplifier input as well as a series-connected zero-organ and inverter, three circuits 2I-N Her are introduced into it a sine-cosine rotary transformer, the rotor of which is connected to the axis of the diamagazine, the rotor winding is connected to the mains voltage, and stator windings - with the input of the quadrant switch, and the outputs of the sensors of the initial and extreme positions of the frame change mechanism are connected respectively to the first inputs of the first and second circuits 2I-NOT, the outputs of which are connected to the inputs of the third circuit 2Y-NOT, the output of which is connected to the control inputs of the mechanism changing the frame and the key, while the input of the zero-organ is connected to the circuit between the filter output and the analog input of the key, and the output of the zero-organ is connected to the second input of the second 2I-NOT circuit, the inverter output is connected to the second input of the first circuit we are 2I-NOT, and the outputs of the two high bits of the control panel are connected to the digital inputs of the quadrant switch, and the outputs of the lower bits of the control panel are connected to the digital inputs of the comparison device.