SU1398073A1 - Device for checking presence of n-information signals - Google Patents

Abstract

The invention relates to automation and computing and can be used in devices for switching signals of electrical circuits containing electromechanical contacts. The aim of the invention is to increase the reliability of the control. The device contains a pulse selector 1 in duration, logic elements OR-NOT 2, AND-NO, and AND-NOT 7, trigger 4, switches 5, inverters 6, resistors 8. In this case, the selector 1 is filled on inverters 9-12 and capacitor 13, and the trigger 4 on the AND-HEY elements 14 and 15. The device ensures the fulfillment of the function of monitoring the availability of n-information signals, controls the availability of information completeness about the operation of the primary n-channel signaling device that increases the credibility of counter ol At the outputs of the elements AND-NOT 7, the device generates normalized signals without chatter both when closing and opening the contacts of the switch 5. 1 Il. (L

Description

with so

00

about

with

The invention relates to automation and computer technology and can be used in com- puter devices: electrical signals of electrical circuits containing electromechanical contacts.

The purpose of the invention is to increase the reliability of the control.

13980732

zero, which blocks the passage of signals through the elements And 7 to the output device.

When any of the switches 5 is closed, a logical zero signal appears at the corresponding input of the element OR-NOT 2, and at the output - a logical unit that prohibits a reset

The drawing shows the electrical trigger 4. After closing the contacts

switches 5 and in the presence of bounce at any contact, the signal from the output of the element AND-NOT 3 is fed to the inverter 12 of the selector 1 and connects the circuit of the proposed device.

The device contains a selector 1 pulses in duration, the element W-NOT 2, the element AND-NOT 3, trigger 4,

switches 5, inverters 6, elements of 5 capacitor 13 on charge. Capacitor 13

i-HE 7 and resistors 8. The selector 1 of the high-selector 1 pulses is fully filled on the inverters 9-12 and the capacitor starts charging, while the SATOR 13 is on, and the trigger 4 is on the capacitance of the capacitor 13 must be

YN 14 and 15, while the movable con-selected so that its time of the switches of the 5-1-5-n switches are connected by a 20 t common bus, the output of the 4 trigger is clearly more than the contact bounce time. As soon as the bounce is over, the capacitor will continue to charge to the actuation potential of the selector inverter 11 with the corresponding fixed Creac-25 1. The inverter 11 of the selector 1 switches switches 5-1-5-n, and is inputted with a logic zero signal to the element OR NOT 2 connected to the corresponding output of the selector 1 turns on the trigger with fixed fixed contacts 4. At the same time, the inverter operates

(Connected to the first inputs of the p elements II-HE 7-1-7-p, the second inputs of which through the inverters 6-1-6-p are connected to

circuit breakers 5-1-5-p and through corresponding-resistor 8-1-8-p resistors with a litany bus, the output with the reset input of the trigger 4, the output of the selector 1 of pulses for the duration connected to the trigger input of the trigger 4, the inputs The element AND-NE 3 is connected to the corresponding inverter codes 6-1-6-p ic to the second inputs of the AND-NE elements 7-1- | 7-p, and the output is connected to the input of the iropa 1 pulse in duration. The device operates as follows.

In the initial position, when all the contacts of the terminal 5 are open, at the inputs of the IPI-NO 2 element there is a logical unit signal fixed by resistors 8. The output of the OR-NOT 2 element has a logical zero signal that resets the trigger 4. At the inputs of the AND-NO element 3 signals are present lo

zero generated by inverti-50 only after some time equal to

the development of a logical unit, fixed by resistors 8. From the output of the element AND-NOT 3, the signal of the logical unit is fed to the input of the selector 1 and through its inverters 12 and 11 55 sets the triggering signal at the trigger input of trigger 4, the logical unit at the output of trigger 4

the charging time of the capacitor 13 of the detector 1.

Thus, at the outputs of the elements AND-NE 7, normalized signals (pulses) without chattering are formed both during the closing and opening of the contacts of the switch 5.

trigger 4. After closing the contacts

switches 5 and in the presence of chatter at any contact, the signal from the output of the element AND-NOT 3 is fed to the inverter 12 of the selector 1 and connects the kono 5

0

9 of the selector 1 and the capacitor 13 are shorted and discharged. The signal from the output of the trigger 4 permits the passage of the signal from the closed contact of the switches 5 through the corresponding inverter 6 and the NE-7 element, while the leading edge of the pulse from the output of the trigger 4 and, accordingly, the signal from the output of the AND-NE element 7 is delayed relative to the beginning of the input signal from the contact switch 5 for charging time, the capacitor 13 of the selector 1.

When the closed contacts of the switch 5 are opened, the reset signal is transmitted through the element OR-NOT 2 to the trigger 4, from the output of which the I-NE 7 element is immediately banned, while all the bounce occurring when the contact of the switch 5 opens is cut off the next trigger start 4 may occur

the charging time of the capacitor 13 of the detector 1.

Thus, at the outputs of the elements AND-NE 7, normalized signals (pulses) without chattering are formed both during the closing and opening of the contacts of the switch 5.

F o rm ula invention

A device for monitoring the presence of n-information signals containing n mechanical switches, the movable contacts of which are connected to a common bus, a trigger, the output of which is connected to the first inputs of n I-NE elements, the second inputs of which through inverters are connected to the corresponding fixed contacts of mechanical switches , OR-NOT element, whose inputs are connected to the corresponding fixed contacts of the mechanical

switches and through appropriate resistors - to the power bus, the output is connected to the trigger reset input, and a pulse selector by duration, the output of which is connected to the trigger trigger input, characterized in that, in order to increase the reliability of the control, an AND NOT element is introduced into it The inputs of which are connected to the corresponding outputs of the inverters and the second inputs of the n-elements AND-NOT, and the output is connected to the input of the pulse selector in terms of duration.

Claims (1)

Claim A device for monitoring the presence of η-information signals, containing η mechanical switches, the movable contacts of which are connected to a common bus, a trigger, the output of which is connected to the first inputs of the η AND-NOT elements, the second inputs of which are connected through the inverters to the corresponding fixed contacts of the mechanical breakers, element OR-HE, input! which is connected to the corresponding fixed contacts of the mechanical switches. and through the corresponding resistors to the power bus, the output is connected to the resetting input of the trigger, and a pulse selector in duration, the output of which is connected to the triggering input of the trigger, characterized in that, in order to increase the reliability of the control, an AND-NOT element is introduced into it, the inputs of which are connected to the corresponding outputs of the inverters and the second inputs η of the AND-NOT elements, and the output is connected to the pulse selector input in duration.