SU1720676A1 - Decoder of remote control commands - Google Patents

Abstract

The invention can be used in radio-controlled models. The aim of the invention is to increase the reliability of the device. The decoder contains a pulse former, a trigger block, a trigger, a differentiation element, a first decoupling element, and an initial setup block. The introduction of the second and third elements of the isolation block and the indicator into the decoder of the block of elements And allowed to exclude a number of elements and increase the reliability of the device. 1 il.

Description

The invention relates to radio engineering and can be used in radio-controlled models.

A command decoder for a radio-controlled model is known (see USSR Certificate of Authors No. 1377134, A 63 H 30/04) containing a control pulse shaping unit, a command decoder unit, a noise protection unit connected to electronic keys.

The same decoder is described in detail in the journal Radio No. 1, 1987; pp. 45-47.

The device is very complicated. For example, to decipher nine commands, it is necessary to install a pulse shaping unit, a counter with a decoder of the position code, nine twelve-bit shift registers, eighty-one diodes, nine resistors. In the control pulse shaping unit, two electrolytic capacitors are used in the time setting chains. It is known that such capacitors have the highest tolerance among the capacitors from the nominal capacitance, with time in these capacitors the insulation is aging, which leads to a change in the electrical capacitance and the output of the capacitor fails.

The circuit does not provide a light signal confirming the zero state of the counter.

The closest in technical essence is the decoder for remote control commands (See Radio No. 7 magazine, 1985, pp. 40, 41).

This device contains a pulse selector, a counter, a block of D-flip-flops, a decoder, an inverter, a differentiator, a timing chain.

The output electronic relays are connected to the decoder directly or via RS-flip-flops.

Just as in A.S. No. 1377134, an unreliable electrolytic capacitor is used here during the driving circuit, not

with

with

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A light signal confirming the zero state of the counter has been provided.

The installation of the D-flip-flops block in front of the decoder led to the fact that in the transmitter encoder to transmit the command to turn on and stop the drive of the mechanism it is necessary to have two separate buttons.

The object of the present invention is to increase the reliability of the device.

The goal is achieved by the introduction of a block of elements And, the second and third elements of isolation, and an indicator whose input is connected to one of the outputs of the first counter, the other outputs of which are connected to the first inputs of the elements And and the block of elements And, the second inputs of which are connected to the first the output of the second counter, the second output of which is connected to the input of the differentiation element, the output of which through the first isolation element is connected to the installation inputs of the counters and the R input of the trigger, the S input of which is connected to the counting input the first counter and the output of the pulse generator, whose input is the device input, the output of the initial installation block is connected via the second and third isolators respectively to the R-inputs of the flip-flops of the trigger block and the R-input of the trigger, the output of which is connected to the control input of the pulse generator, one of the outputs of the block of elements I is connected to the R-inputs of the flip-flops of the block of flip-flops, and the other outputs with the C-inputs of the block of flip-flops, the outputs of which are the outputs of the device.

The drawing shows the block diagram of the decoder.

The decoder contains a control pulse shaping unit 1 associated with the first decimal counter 2 with the decoder of the position code, the zero position of which goes to the light indication unit 3 of zeroing the first decimal counter 2, and the positions from the first to the eighth exit through the node 4 -NOT and node 5 of inverters to their T-flip-flops, combined into block 6 T-flip-flops, the position of the ninth through element 2I-NOT and the inverter goes to the combined zero input of all T-flip-flops of block 6, RS-flip-flop 7 is connected to the generator 8 pulses with built-in a trigger and a zero reset block 9, the latter is connected to the combined zero reset input of all T-flip-flops of block 6, the zero reset inputs of the first 2 decimal counter with the decoder of the position code and the second 10 decimal counter with the decoder of the position code, which is connected to the generator of 8 pulses and exit from the position of nine through

differentiator 11 and a diode with a common zero line, at the exit from position seven

-with a block of 4 elements 2I-NOT,

Nodes 4 and 5 are part of the block 5 of the elements And (not shown in the drawing).

In the control pulse shaping unit 1, the pulses come from the receiver output.

The zero reset unit 9 is connected to a (+) power supply.

The control pulse shaping unit 1 is described in Radio No. 8, 1985, p. 32, fig. ZB

The T-flip-flop of block 6 is presented in book 5, Digital Circuit Design at Broadcasting Receivers. S.G. Kalikhman, V.I. Shekhtman, M. Radio and Communication, 1982, p. 12, fig.9.

Pulse generator 8 with built-in 0 trigger is shown in the journal Radio No. 8, 1985, p. 33, fig. 14 a.

An electronic relay is one unpackaged KT315 type transistor and an output relay.

5 The required frequency in the pulse generator 8 is set by selecting a resistor and a ceramic capacitor in block 8.

The decoder works as follows.

The controlled model is installed in the starting position. A switch supplies voltage to the model's drive control circuit.

5 The incoming (+) from the power source to the zeroing block 9, the output from it (+) with a pulse that has reset the T-flip-flops of the block 6, the first 2 and the second 10 decimal counters, puts the RS-flip-flop 7 into the 0 state, which is the only way out by vits (+). Appearing (+) at the zero position of the first decimal counter 2 will turn on the unit 3 of the light indication of zeroing the first decimal counter 2. The operator will see the light of the bulb 5 on the model (the light of the bulb

is permission for the operator to issue a control command.

(+) at the output of the RS flip-flop 7 sets the built-in trigger of the generator 8 and 0 pulses to the state of the prohibition on generation. The operator has a transmitter with an encoder (not described in the description) control commands, which serve to control eight drives and issue 5 one emergency command, which can cancel all the commands already fixed by the decoder circuit.

Since, after the first decimal counter 2, a T-flip-flop is installed, to enable and disable each drive

the same self-return control button is used.

In total, there are nine control buttons on the transmitter encoder's console.

Giving any of the nine commands is a one-time issuance from the transmitter of one pulse packet with the number of pulses in it from one to nine.

For example, an operator needs to issue command number 3. After visually seeing that the null signal is on the model, the operator presses and releases control button number 3 on the transmitter control panel. A packet of three pulses will go on the air.

The receiver will receive them and successively transmits them to the pulsing unit 1 of the decoder.

The first impulse released from block 1 transfers the first decimal counter 2 from position zero to position one, the zero indication light block 3 loses power.

At the same time, the same first pulse translates the RS-flip-flop 7 into such a state that at its only output it turns out to be (-), which will switch the embedded trigger of the pulse generator 8 to the issuing state of (+) pulses to the second decimal counter 10.

The second pulse of the RS flip-flop coming out of block 1 does not change, but in the first decimal counter 2 it moves (+) from the first position to the second position.

Similarly, the third (last) impulse released from block 1 will transfer (+) from the second position to the third in the first decimal counter 2.

(+) The pulses from the first and second positions of the first decimal counter 2 successively hit the first inputs of elements 2I / I-HE of node 4, but the state of these elements did not change, because there was (-) potential at their combined second input.

But all this time, the generator of 8 pulses worked, which applied its (+) pulses to the counting input of the second decimal counter 10, sequentially transferring (+) the potential from one position to the next.

As soon as this (+) potential arrives at the seventh position, it will be transferred to the combined second input of element 3h, which will cause a change in its state, since only at the first input of this element was (+) potential. At the output of the element 4z, the potential (V) is applied to the input of the inverter 5h. The potential formed at the output of the 53J + inverter will switch the T-flip-flop 63 in such a way that its direct output is Vits (+), therefore, the model No. 3 drive will turn on through its electronic relay.

The generator of 8 pulses that continues to work will transfer the 10 (+) potential from the seventh position to the eighth and further to the ninth (potential (+) left from the entrance to the T-flip-flop 63,

but the trigger remained on, therefore, the drive number 3 of the model remained also on), from where it proceeds through differentiator 11 and the diode to the common zeroing bus.

Zero the first 2 and second. 10 decimal counters, the RS-trigger is set to such a state that at its only output a potential (+) is reached, therefore, the generator of 8 pulses will stop.

The light indication unit 3 of zeroing the first decimal counter 2 will turn on again, the indicator light on the model will light up.

The decoder circuit has returned to its original state to receive the next command. Even when drive No. 3 is turned on, drives No. No. can be switched on and work independently from each other.

1,2,4 + 8.

To turn off a drive already in operation, just press and release the same control button with which it was turned on.

Repeated impulse to turn on the T-flip-flop leads to its disconnection, respectively, disabling its electronic relay and actuator.

A team of nine pulses is

emergency and serves to simultaneously turn off all eight T-flip-flops, respectively, of all the actuators of the model (see drawing). The parameters R and C of the generator 8 pulses of the decoder are selected such that the frequency of the encoder's generator is one and a half times higher than the frequency of the generator of 8 pulses. For example, if the first decimal counter 2 counted nine pulses of a command, then simultaneously with it the second

The decimal counter 10 counted only six pulses received from the generator of 8 pulses.

All this is necessary for a precise fixation of the time interval between the switching on of the Triggers and the general zeroing of both counters and the switching of the RS flip-flop.

The advantages of the proposed device.

In the circuit, instead of electrolytic capacitors, ceramic capacitors are used, in which the capacitance is an order of magnitude lower than that of electrolytic capacitors. Received capacitors have a relatively low permissible deviation from the nominal capacity, greater reliability in operation.

The circuit itself sets to the initial state without receiving for this signal from the transmitter.

The initial state of the circuit is fixed by a light indicator.

The circuit can simultaneously control a model that has from one to eight drives.

To turn on and off each model drive, the same control button is used, which is installed on the transmitter control panel.

Due to the use of additionally installed blocks and nodes, the moments of switching on T-triggers (that is, the memory of a given command) and the zeroing points at the end of the reception cycle of each pulse packet are clearly recorded.

The possibility of simultaneous emergency shutdown of all drives of the model.

Claims (1)

Invention Formula A telecontrol command decoder containing a pulse shaper, two counters, pulse generator, trigger unit, trigger, differentiation element, first isolation element, initial setup block, characterized in that, in order to improve the reliability of the decoder, the AND element block and the second isolation element and indicator are inserted into it, the input of which is connected to one of the outputs of the first counter; The other outputs of which are connected to the first inputs of the elements AND of the block of elements I, the second inputs of which are connected to the first output of the second counter, the second output of which is connected to the input of the differentiation element, the output of which through the first isolator is connected to the installation inputs of the counters and the R input of the trigger, The S input of which is connected to the counting input of the first counter and the output of the pulse former, whose input is the input of the device, the output of the initial installation block is connected via the second and third elements respectively, with the R-inputs of the flip-flops of the trigger block and the R-input of the flip-flop, the output of which is connected to the control input of the pulse generator, one of the outputs of the I-block and connected to the R-inputs of the flip-flops of the trigger block, tiggers, the outputs of which are the outputs of the device. /