SU1511860A2 - Touchless switching device - Google Patents

Abstract

The invention relates to a pulse technique and can be used in input and output devices. The aim of the invention is to increase the reliability of operation by repeatedly repeating the read information enable signal after a delayed touch time. The goal is achieved as a result of the introduction of a controlled oscillator 11, an additional oscillator 12, which uses a single vibrator, and an element OR NONE 13. In addition, the touch switch contains multiplexer 1, touch pads 2, counter 3, one vibrator 4, and an additional output bus 5 , output bus 6, register 7, trigger 8, generator 9 pulses, driver 10 pulses. The invention makes it possible to increase the reliability of the operation of the sensor switch, providing automatic command repetition. 1 il.

Description

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The invention relates to a pulsed equipment and can be used in devices for input and output of information,

The purpose of the invention is to increase the accuracy of operation due to repeated automatic repetition of the read resolution signal after a contact time delay by introducing a controlled | Q generator, an additional generator, and an OR-NO 13 element connected to the additional bus of the device.

The drawing shows an electrical functional diagram of the touch switch is.

The switch contains multiplexer 1, touch pads 2, counter 3, one-shot 4, additional output bus 5, output buses 6, register 20 7, trigger 8, pulse generator 9, pulse shaper 10, controlled oscillator I 1, additional one-shot 12 and the element OR-13, Touch pads 2 are connected to the information inputs of multiplexer 1, its gate input is connected to the driver 10 pulses, and the control inputs to the outputs of counter 3 and information inputs of the register 7, the output of multiplexer 1 is connected with infor trigger input 8, the output of which is connected to the input of the one-shot 4 with restarting, the installation input of the trigger 8 is connected to the output 35 of the shaping unit 10 pulses, fjjj register 7 connected to the output buses 6, the output of the generator 9 pulses are connected to the input of the forming device 10 pulses input of the counter 3 is connected- 40 dinen directly with the release of the gene-. Rattor 9 pulses. The inverse output of the one-shot 4 is connected to the first input of the element OR NOT 13 and the input of the additional one-shot 12,

the direct output is connected to the first input of the controlled generator 1I, the second input of which is connected to the inverse output of the additional one-shot 12, and the output is connected to the second input of the element OR NOT 13, to the output of which is connected an additional output bus 5,

Touch switch works as follows. HS

In the initial state, at the output of multiplexer 1, short pulses of negative polarity delayed by the response time of multiplexer 1 are present with a frequency determined by the generator 9 Impuls. Short clock pulses are generated by the shaper 10 on the positive edge of the generator 9 pulses, and the negative edge is switched by the counter 3,

Negative pulses from the output of multiplexer 1 are fed to the reset input of trigger 8, to the synchronization input of which clocking pulses are received from the driver 10, trigger 8 is maintained in the zero state due to the presence of negative pulses at its input.

Thus, at the output of the trigger 8, no pulses are present in the initial state, the single vibrator 4, the additional single vibrator 12 and the controlled generator 1I are not started and the additional output bus 5 has a logic zero level. In the case of an operator touching any touch pad 2, the corresponding negative pulse disappears at the output of multiplexer 1, the trigger 8 switches to the unit state and remains there until the next clock pulse arrives. On the leading front of the pulse from the output of the trigger 8, a single-switch 4 is triggered, the negative difference from the inverse output of which records the code of the counter 3 into the register 7, while the counter 3 is in a steady state due to the BQ separation of the formation time of the clock pulse and the moments. The switching of the counter 3, and the code of the counter 3 corresponds to the number of the touch pad 2, which the operator touched. During the touch, at the output of the trigger 8 there are pulses of long duration. equal to one clock period. These pulses restart the one-shot 4, maintaining a zero potential at its output,

With the launch of the one-shot 4 by a zero signal, an additional one-shot 12 is started from its inverse output, blocking the operation of the controlled oscillator 11 and counting the touch time. Simultaneously, the zero-level resolution from the inverse and the single from the direct output levels of the one-shot 4 is supplied respectively to the first

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the inputs of the element OR NOT 13 and the control of it | generator 1 I, Since the controlled generator 1I is blocked by the second input of the control (at this input is level O), then at the output of the element OR NOT 19 n, therefore , the additional output bus begins to act high active level, on the leading edge, together with the processing device, about the presence of a command on the output tires 6.

Experimental observations of the work of operators on touch-sensitive keyboards. It was found that, when operating in normal mode, operators only briefly touch the touch pads, without keeping their finger on them for a long time.

If, at the end of the exposure time of the additional one-shot 12, the touch of the touch pad continues, the touch switch switches to automatic repeating of the command, the code of which is set; on the output tires 6, At the same time, the controlled generator 11 starts to work, interrupting through the element YLI-NOT 13

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signal on the additional output bus 5.

Claims (1)

Invention Formula  Touch switch auth. No. 1058031, characterized in that, in order to increase the reliability of operation due to the repeated automatic repetition of the information read resolution signal after the touch time delay, an OR-NOT element is introduced into it, a controlled oscillator and an additional one-shot, with the input of an additional one-shot being connected to the synchronization input of the memory register, the direct output of the one-shot is connected to the first input of the controlled generator, the second input of which is connected to the inverse output of the additional single-vibrator, the output of the controlled generator is connected to the first input of the OR-NOT element, the second input of which is connected to the inverse output of the single-vibrator, and the output of the OR-NOT element is connected to additional output bus device.