SU1377134A1 - Decoder of commands for radio-controlled model - Google Patents

Abstract

The invention relates to the field of radio engineering, can be used in radio-controlled models and allows to increase the noise immunity by repeated analysis of the number of pulses of the control command. When a group of pulses arrives at the inverter input without interference, control voltage commands are generated at the output registers, the counter counts the number of pulses in each group and each register determines which group of pulses entered the inverter input, as a result of which the noise protection block prevents appearance of electronic keys of false command signals at the inputs. 2 Il.

Description

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

The purpose of the invention is to improve the noise immunity. ,

. FIG. 1 shows the principal scheme of the decipher; in fig. 2 - stress diagrams for the operation of the decoder.

The decoder contains a control pulse shaping unit 1, a command decryption unit 2, a noise protection unit 3 connected to electronic keys (not shown).

The control pulse shaping unit 1 includes an inverter 4, a one-shot assembled on elements 5-8, a reset pulse shaper assembled on elements 9-G1 through an inverter 12 connected to the installation input of the command decryption block 2, which is assembled on chip 13, This is a decimal counter combined by a decoder, the outputs of which are connected to the interference protection unit 3. Unit 3 includes diode cells 14–17, the outputs of which are connected to the resistances 18 and the installation inputs of the shift registers 19-22, the outputs of which are connected to the inputs of electronic switches (not shown) and through the corresponding diode cell to the installation inputs of the other registers. The pulse duration of the one-shot is set by element 7, and the duration of the reset pulse is set by element 10.

The decoder works as follows.

The giving of any control command is preceded by the issuance of the command "Stop, containing a group of six pulses (Fig. 2a).

With the arrival at the input of the inverter 4 of the first pulse at the output of the element 8, a low logic level (Fig. 26) is achieved, which in time 7T (set by element 7) will change to a high level and

For the "Back after the first group" command, signals are not recorded in registers 19-21, and after the fourth group, a control voltage appears at the output of register 22, which is fed to the electronic key, and the model executes the intended command.

 Thus, the formation of control voltage commands at the outputs of the registers, when the input of the inverter 4 received a group of pulses without interference. Moreover, the counter of chip 13, the output of the one-shot pulse (Fig. 2c), 40 read the number of pulses in each

through the inverter 12 (Fig. 2d) will pass to the installation input of the command decryption unit 2.

During the time of 7T, all the pulses of the first group are sent to the counting input of unit 2 from inverter 4, and each pulse of this group at the output of chip 13 will cause a high level that moves from output a to d. During this movement, each register will follow information45

the group, and each of the registers determined what the group of pulses was by the number received at the input of the inverter 4 of this descrambler.

In real conditions, the groups of impulses with noise come to the input of the inverter. To each group of the considered command, from one to several interference pulses can be added. In this case

In real conditions, the groups of impulses with noise come to the input of the inverter. To each group of the considered command, from one to several interference pulses can be added. In this case

qi, but the last impulse from the output of the block 3 noise suppression will prevent it from blocking and t / tchu gg AL Q IlOr rSO7T P u s SIUTT / T jy .. “

Yes, chip 13, through diode cells 14-17, will return all registers to their original state.

In addition to the “Stop” command, this decipher performs the commands “Left, Right, Forward, and“ Back.

Let us consider how the control voltage is formed at the output to register 21, when groups 55 are received at the input of inverter 4

nor at the inputs of the electronic keys of false command signals.

As an example, let us consider how block 3 prevents a false command signal from appearing at the output m of register 22 if the groups of impulses of the command “Back with interference.

pulses without interference command "Forward. Since each group of this command contains four pulses, the first group will be recorded in the first bits of registers 19-21, the second group - in the second bits of the same registers. But after the second group, the output level and the register 21 will result in the level "1, which through the diode cells will go to the installation inputs R of the registers 19-22, thereby setting them to their initial state and prohibiting further recording of the signals in these registers. After the second group, the third group of pulses of this command will go to the input of the inverter 4 and the third output of the register 21 will receive the level “1. Then to the input of the inverter 4 will enter the fourth group of the command "Forward and after it at the output to the register 21 occurs the level" 1. This is the control voltage of the “Forward” command, which will trigger the electronic key, and the model will execute the intended command.

The control voltage of the left-click command at output e of register 19 after the fourth group and from this point on, no further recording of signals from the other commands to other registers occurs.

The control voltage of the right command appears at the output of register 20 also after the fourth group. However, after the third group, further recording of signals into the other registers does not occur.

For the "Back after the first group" command, signals are not recorded in registers 19-21, and after the fourth group, a control voltage appears at the output of register 22, which is fed to the electronic key, and the model executes the intended command.

Thus, the formation of control voltage commands at the outputs of the registers, when the input of the inverter 4 received a group of pulses without interference. And the chip counter 13 pod0

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the group, and each of the registers determined what the group of pulses was by the number received at the input of the inverter 4 of this descrambler.

In real conditions, the groups of impulses with noise come to the input of the inverter. To each group of the considered command, from one to several interference pulses can be added. In this case

unit 3 interference suppression will prevent on the left .. "

nor at the inputs of the electronic keys of false command signals.

As an example, let us consider how block 3 prevents a false command signal from appearing at the output m of register 22 if the groups of impulses of the command “Back with interference.

Suppose that only the first and third groups of impulses of the Back command contain one impulse of interference each. In this case, the sixth pulses of these groups will set the 19,20th and 21st registers 19-21 to the initial state. The fourth group will cause the appearance of the level "1 at the output of the l register 22 and the recording of signals in the other registers will stop. The control voltage of this command is Vits at the output of the register 22 after the seventh group. This voltage will go to the electronic key, and the model will execute the intended “Back. On the example of the execution of the command "Back was considered the case when

Claims (1)

Invention Formula A command decoder for a radio-controlled model containing a control pulse shaping unit, a command decoder unit and electronic keys, characterized in that, in order to improve control accuracy by repeatedly analyzing the command signal, it contains shift registers and diode cells by the number of control commands , while each diode cell includes diodes, the negative terminals of which are connected to the installation inputs of the corresponding register, the first outputs of which are connected to both groups contained one by one they have positive terminals of the corresponding pulse interference. However, it may happen that the diodes of the diode cells of the remaining register are connected to one or several groups of impurities, and the second inputs to the corresponding pulses will be attached to a certain electronic key, and inverse pulses, while none of the output of the pulse shaping unit outputs e, 3, k, m of the controlling control connected to the counting input the springs do not occur and then to the input 20 of the command decryption unit, to the installation inverter 4 it is necessary to feed the pulse-input groups of which the second output is connected the control pulse shaping unit; the first four outputs of the command decryption block are connected to the counting input of the interference pulses to the left inputs of the corresponding register, and the fifth false control voltage to the output to the positive terminal of the corresponding electronic key. each cell. owls team “Stop. The decryptor allows Confined Invention Formula A command decoder for a radio-controlled model, comprising a control pulse shaping unit, a command decoder unit and electronic keys, characterized in that, in order to improve control accuracy by repeatedly analyzing the command signal, it contains shift registers and diode cells by the number of control commands, wherein each diode cell includes diodes, the negative terminals of which are connected to the installation inputs of the corresponding register FIG. FIG. 2