SU1591059A1

SU1591059A1 - Remote control apparatus

Info

Publication number: SU1591059A1
Application number: SU884479096A
Authority: SU
Inventors: Yurij V Glushenkov; Aleksandr N Shturman
Original assignee: Sp Kt B V Sp N Proizv Obedinen
Priority date: 1988-08-30
Filing date: 1988-08-30
Publication date: 1990-09-07

Description

The invention relates to electronics and can be used for remote control. purpose

2

inventions - increasing the reliability of transmitted commands. The device contains on the transmitting side encoder 1 commands, shift register 2, driver 3 pulses, divider 4 frequencies, counters 5, 12, generator 6 clock pulses, switch 7, amplifier 8, emitter 9, element.

And 10, the trigger 11, on the receiving side of the photodetector 13, the amplifier 14, the pulse shaper 15-18, the element And 19, the shift register 20, the counter 21, the key block 22. The device allows to increase the reliability of transmission and reception of commands due to the fact that And 19 does not respond to impulse noise. 2 Il.

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The invention relates to radio-electric. tronike and can be used for remote control of home TV and radio equipment.

The purpose of the invention is to increase the reliability of transmitted teams.

Figure 1 shows the functional diagram of the device; figure 2 - timing charts of his work.

The device (figure 1) contains on the transmitting side encoder 1 commands, shift register 2, pulse shaper 3, frequency divider 4, first counter 5, clock generator 6, controlled switch 7, matching amplifier 8, emitter 9, element And 10, trigger 11, the second counter 12, on the receiving side of the photodetector 13, optically coupled to the emitter, matching amplifier 14, first 15, second 16, third 17, fourth 18 pulse drivers, element 19, shift register 20, counter 2G, key block 22 .

The device works as follows.

When you press the keys of the keyboard at the output of the encoder 1 command, a binary p-bit code is generated, which is written to the n-bit register '2 shift in parallel form by the signal from the driver 3, which removes the signal K set to "0" of the divider 4 and the counter 5. After removing the signal K., the pulses from the generator 6 through the switch 7 are fed to the amplifier 8 and converted into infrared radiation using LED emitters 9. At the same time, the duration of the emitted signal is determined ^! The value of the high order of register 2 shift. If the value of the high-order digit of the shift register 2 arriving at one of the inputs of the AND 10 element corresponds to the level of the logical unit, then the switch 7 prohibits the passage of pulses from the generator 6 to usi ~. 8 ', and the radiation stops when a signal of a logical unit appears at the 2 * output of counter 5. If the high-order value is zero, the switch 7 is closed by a signal of a logical unit from the output of 2 ^tons (w> k) of the counter 5. Thus the radiation duration corresponding to the specified logical levels is a

?, = 2 to / Р, = 2 ш / Р,

where P is the clock frequency of the generator. ra 6,

The shift register 2 is transferred to the sequential information output mode using the trigger 11, which is entered by the first pulse from the divider 4, i.e. with some delay after removing the signal K.

Regardless of the value of the high-order digit of the shift register 2, the counter 5 continues to count the pulses after the emission ceases until it reaches zero. When this happens, the unit is added to the counter 12, and the driver 3 generates a shift pulse one shift of the shift register 2 and opens the controlled com-, mutator 7, which transmits pulses from the generator 6 to the amplifier 8.

The cycle is repeated until the counter 12 counts all η digits, after which the driver 3 generates the installation signal at "0". The generated signals from the emitter 9 are received by the photodetector 13. The modulated signal from the photodetector 13 is fed to the amplifier 14, the oscillating circuit of which is tuned to the oscillator frequency 6. Next, the signal goes to the driver -15 pulses, the load of which is the Schmitt trigger, which forms the pulse signals from the analog . The signals at the output form. The body of 15 pulses is similar to the signal at the output of the switch 7 with the only difference that it undergoes detection,

In the initial state after power-up, the shift register 20 is in an arbitrary state, the counter 21 is reset, and all outputs of the key block 22 are turned off (in the open state). In the presence of a signal from the radiator 9, the leading edge of the pulse from the Schmitt trigger is formed. The pulse generator 15 starts the second shaper GB of pulses, a pulse from which with a duration of T ₄ <o, goes to the first input of an element I 19, to the second input of which a signal comes from the output of the driver of 15 pulses. If a pulse interference was received, then the output of the element And level 19 will not change. If a useful signal is received, then by the cut of the signal at the output of the element And 19 the third pulse shaper 17 will start and the condition

4 ' ¹ 2 ~ "

where - the duration of the pulse generated by the third shaper 17 pulses.

At the end of the pulse T ₂ , information is recorded and shifted by one digit in the η-bit shift register 20, the output of which forms the source code of the key pressed.

After the transfer of all bits of the code, the counter 21 starts the fourth pulse shaper 18, the pulse from the output of which resets the counter 21, and for a time (pulse width generated by the pulse shaper 18) opens the key block 22 to transmit the code and generates a signal confirming that the key code .

The proposed device allows to increase the reliability of transmission and reception of commands, · since the element And 19 does not respond to impulse noise.

Claims

Claim

Device for remote control, containing on the transmitting side a clock pulse generator, the output of which is connected to the information input of the controlled switch and to the information input of the frequency divider, the output of which is connected to the information input of the first counter, a command encoder, the output of which is connected to the information input of the shift register, output controlled switch through a matching amplifier is connected to the input of the radiator, the output of which is optically connected to the photodetector, on the receiving side with reads amplifier having an input connected to the output of the photodetector, the output of the matching of the amplifier is connected to the input of the first pulse shaper, a counter, shift register, characterized in that, c 'in order to increase the reliability of the transmitted commands to the device on the transferred zd

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A second counter, a trigger, a pulse shaper, an element And, the output of the shift register are connected to the first input of the element And, the second input of which is connected to the first input of the element And, the second input of which is connected to the first output of the first

the counter, the output element And is connected to the first control input of the managed switch, the output of the frequency divider is connected to the information input of the trigger, the output of which is connected to the control input of the shift register, the second output of the first counter is connected to the clock input of the pulse shaper, the information input of the second counter and to the second control the input of the managed switch, the output of the second counter is connected to the control input of the pulse shaper, the first output of which is connected to the clock input register shift, the output of the command encoder is connected to the information input of the pulse shaper, the second output of which is connected to the control inputs of the frequency divider, the first and second counters, the trigger and to the third control input of the controlled switch, the block of keys is entered on the receiving side, the second and third elements and the fourth pulse shaper, the output of the first pulse shaper is connected to the information input of the shift register, the first input of the element And and through the second pulse shaper to the second input of the element Ta And, the output of which through the third pulse shaper is connected to the clock input of the shift register and the information input of the counter, the output of which through the fourth pulse shaper is connected to its control input, the control input of the key block and is the control output of the device, the output of the shift register is connected to the information input of the block keys, the output of which is an information output device.

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I 6 w :::: g: ":::::: 1 ⁰ I 7 one one..... - ¹ 1 1 ⁹ | 12 one one one one ι 1 ! _and .one L •-one ! Λ 1-1 ¹ 1 one one * one ____ □

Transmitting part

P . interference PP P —ΙΓ 1111 II eleven ! one one —-— ’ 0 0 7 ⁰⁰

Reception part

FIG 2