SU1370774A1 - Channel selector - Google Patents

Abstract

The invention relates to a pulse technique. In order to improve speed, the channel selector device (K) contains a setting device 1 of the number K, an indicator 2 of the number K, a control knob 3, an optocoupler driver 4, a controlled trigger 5, a static converter 6 of codes, a reversible counter 7 an AND-OR element 8, generators 9-11 pulse sequences, elements OR 12, 13, pulse shaper 14, delay elements 15, 16, outputs 17. 1 Cp

Description

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The invention relates to a pulse technique.

The aim of the invention is to increase the speed and enhancement of functionality achieved by introducing a single switching mode.

Figure 1 shows the functional diagram of the channel selection device; Fig. 2 is a diagram of a controlled trigger 5 entering the device.

The channel selection device contains a channel number setting device 1, a channel number indicator 2, a control knob 3, an optocoupler driver 4, a controllable trigger 5, a static converter 6 codes, a reversible counter 7, an AND-OR element 8, the first and third generators 9-11 pulse sequences, first and second elements OR 12 and 13, pulse shaper 14, first and second delay elements 15 and 16, device outputs 17 (first 18 and second 19 groups).

The control knob 3 is connected to an input of a channel number setting device 1, the first group 18 of the outputs of which is connected to the channel number indicator 2, and the second group of outputs 1 y are device outputs 17.

The outputs of the generators 9-11 pulse sequences are connected respectively to the first, second and third inputs of the element AND-OR 8, the fourth, fifth and sixth inputs of which are connected respectively to the first second and third outputs of the static converter 6 codes, the first input of which is connected to the first output optronic driver

4, the first input of the controlled trigger 5 and the first input of the element OR 12, the output of which through the driver

14 pulse is connected to the first input of the OR element 13, the second input of which through the delay element 15 is connected to the output of the AND-OR element 8, the output of the OR element 13 through the delay element 16 is connected to the C-input of the reversing counter 7, the outputs of which are connected to the first 18 and the second 19 groups of outputs of the setpoint 1 channel number, the first and second inputs of the counter 7 are connected respectively to the first and second outputs of the controlled trigger

5, the second input of which is connected to the third output of the optocoupler driver

device 4, the second input element OR 12 and the third input of the static converter 6 codes, the second input

which is connected to the second output of the optocoupler set-up device 4. The controlled trigger (see Fig. 2) contains first to fourth elements AND-NO 20-23.

The output of the element IS-HE 22 of the controlled trigger 5 is connected to the first output of the controlled trigger 5 and to the first input of the element AND-HE 23, the output of which is connected to the second output of the controlled trigger 5 and to the second input of the element IS-HE 22, the first input which is connected to the output of the element AND-NOT 20 and the first input of the element AND-NO 21, the second input of which is connected to the second input of the controlled trigger 5, the output of the element AND-NO 21 is connected to the second input of the element AND-NOT 23 and to the second input of AND-NOT 20, the first input of which is connected to the first input of the controlled trigger 5.

The device channel selection works as follows.

When the control knob 3 is led to the right, a signal appears at the first output of the optocoupler 4, which sets the controlled trigger 5 to state 1. The static code converter 6 switches to the C input of the reversible counter 7 via the AND-OR element 8 pulses of the first generator 9 pulse sequence. The reversible counter 7 is filled at a first rate. Upon further deflection of the control knob 3 to the right, signals appear on the first and second outputs of the optocoupler 4, which, arriving at the inputs of the static converter of 6 codes, ensure the output of the AND-8 element of the second generator

10 of the pulse sequence, as a result of which the reversible counter 7 is filled with a second speed greater than the first. Similarly, when the handle 3 is retracted right up to the stop, the pulses of the third generator 11 of the pulse sequence arrive at the pin of the element AND-OR 8 and the reversible counter 7 switches with maximum, third speed.

31370774

To decrease the channel number, control knob 3 is moved to the left. In this case, the static converter 6 codes is set first with the counting rate and the direction of counting by counter 7 to decrease. With further retraction of the control knob 3, the second speed is established, and when the handle is retracted further to the left, the third speed is set to the stop Q.

In this case, there is a difficulty in stopping the switch on the desired channel, which is caused by the difference in reaction time 5 between operators and their training. To this end, it is possible for the operator to complete the setting at a pace that is convenient for him, which reduces setup time and leads to 20 operator fatigue reduction.

This is done as follows.

At short-term (time determined by the parameters of the imaging unit 14) leading the control knob 3 to the right 25 or to the left, a signal appears at the first or third output of the optocoupler 4, a signal appears at the output of the first element OR

The magnitude of the delay of the elements 15 should provide. Unconditional excess of the time of formation of signals of pulse sequences (static converter circuit 6 codes - element AND-OR 8 - delay element 15) over the maximum possible formation time of a single counting pulse (circuit element OR 12 - pulse former 14) .

The highest performance requirements of a pred are to a controlled trigger 5.

Elements AND-NOT 20-23 form two static trigger (elements 20, 21 and 22, 23).

In the absence of signals at the first and second inputs of the controlled trigger 5, the signals at the outputs of elements 20, 21 correspond to 1, which corresponds to the absence of signals at the inputs of the second trigger (at elements 22, 23), the state of which depends on the previous combination of input signals. When a signal is applied to the first trigger input 5, the state of the element outputs is as follows: 21-,

12, with the result that at the entrance formi-i 30 (signal to the account to increase);

23 - O. When a signal is applied to the second input of the trigger 5, the state of the outputs of the elements is as follows:,, (the counting signal is reduced). When signals are simultaneously applied to both inputs, controlled trigger 5 retains its previous state.

the rotator 14, the signal I is formed through the OR element 13 and the delay element 16 it changes the state of the reversible counter 7 by one and at the same time blocks the passage of signals of pulse sequences from the output of the AND-OR element 8 through the delay element 15 and the element OR 13 to the reverse input counter 7 for the duration of a single pulse from the former 14, at the end of which the blocking of the passage of the pulses is stopped and the device operates as described above.

The blocking time is recommended to be at least 0.5 s.

The magnitudes of the delays of the elements 15 and 16 are chosen based on the task of preventing races in the chains of forming the counting signals, forming the first counting pulse, and forming pulse sequences. The magnitude of the delay of the element 16 should ensure unconditional excess of the time for the formation of a single counting pulse over the maximum possible time for the formation of the signal of the counting direction.

The magnitude of the delay of the elements 15 should provide an unconditional excess of the time of formation of the signals of pulse sequences (static converter circuit 6 codes - element AND-OR 8 - delay element 15) over the maximum possible formation time of a single counting pulse (circuit element OR 12 - pulse former 14).

The highest performance requirements of a pred are to a controlled trigger 5.

Elements AND-NOT 20-23 form two static trigger (elements 20, 21 and 22, 23).

In the absence of signals on the first and second inputs of the controlled trigger 5, the signals at the outputs of elements 20, 21 correspond to 1, which corresponds to the absence of signals at the inputs of the second trigger (on elements 22, 23), the state of which depends on the previous combination of input signals. When a signal is applied to the first trigger input 5, the state of the element outputs is as follows: 21-,

 (signal bills to increase);

23 - O. When a signal is applied to the second input of the trigger 5, the state of the outputs of the elements is as follows:,, (the counting signal is reduced). When signals are simultaneously applied to both inputs, controlled trigger 5 retains its previous state.

Claims (2)

1. Channel selection device containing a control knob, channel number setpoint, channel number indicator, opto-driver, controlled trigger, static code converter, reversible counter, AND-OR element, first, second and third pulse sequence generators, first and second output groups, the control knob is connected to the input of the channel number setter, the first group of outputs of which is connected to the channel number indicator, and the second group of outputs is the output of the device, the outputs from the first to third th pulse pattern generator are connected respectively to the first - third inputs an AND-OR element whose inputs from the fourth and sixth sixth terminals are connected respectively to the first to third outputs of the static code converter, the first input of which is connected to the first output of the optocoupler and the first input of the controlled trigger, the second input of which is connected to the third output of the optocoupler and the third input of the static code converter, the second input of which is connected to the second input of the optocoupler device, the input of which is the input of the channel number setter, The first and second outputs of the controlled trigger are connected to the first and second inputs of the reversible counter whose output is connected to the first and second groups of outputs of the channel number setter, characterized in that, in order to extend the functionality, the first and second elements OR, pulse shaper , the first and second delay elements, the first and second inputs of the first OR element are connected respectively to the first and third outputs of the optocoupler driver, the output of the first OR element the pulse shaper is connected to the first input of the second OR element, the second input of which is connected via the first delay element to the output of the AND-OR element, and the output of the second OR element is connected to the C input of the reversible counter. 2. A device according to Claim 1, characterized in that, in order to increase speed, the controlled trigger consists of the first, second, third and fourth AND-NOT elements, the output of the third AND-NOT element being the first output of the controlled trigger , is connected to the first input of the fourth NAND element, the output of which is the second output of the controlled trigger is connected to the second input of the third NAND element, the first input of which is connected to the output of the first AND-NAND element and the first input of the second AND-NAND element, the second input of which is the second input of the controlled trigger and the output connected with the second input of the fourth NAND element and the second input of the first NAND element, the first input of which is the first input of the controlled trigger.