SU1164762A1 - Device for checking serviceability of signal lamps - Google Patents

Abstract

A DEVICE FOR CHECKING THE CORRECTION OF SIGNAL LAMPS, containing a switch, the first inputs of which are connected to the sensors, and the first outputs - with warning lamps, a light and sound indicator, a BAN element, a polling frequency adjuster and a button, characterized in that, in order to increase the information content of the device; A selector is entered into it, the first and second counters, the trigger, the output of the polling frequency adjuster is connected to the first input of the first counter and the first input of the BAN element whose output is connected to the first input of the second counter and the second input of the switch, the output of the second counter is connected to the first light input indicator, with the third input of the switch and the first input selector, the remaining inputs of which are connected to sensors, the second output of the switch is connected to the first input of the trigger, the second input of which is connected to the first output The first counter, the second output of which is connected to the second input of the light indicator, the third input of which is connected to the output of the selector, the trigger output connected to the fourth input of the light indicator, the second input of the first counter, the second input (L of the BANNER element and the first input of the audio indicator, the second input which is connected to the button.

Description

05 4: 1 O The invention relates to control and alarm systems and can be used to automatically remotely check the health of a large number of signal lamps in signaling circuits. A device for checking the health of signal lamps is known, one of the outputs of the sensing element is connected to the positive pole of the control power source, and the other is connected to the indicator input, the input of the control circuit is connected to one input of the control switch, the other input of which is connected to the other output of the sensing element. the switch are connected respectively to the same terminals of each lamp and through the closing contacts of the switch to the sensors, the other terminals of the signal lamps are combined and Through the changeover contact of the switch, they are connected to the power source 1. The disadvantage of this device is the low reliability of the signaling circuit, since for the time of the health check the signal lamps are disconnected from the signaling circuit. The closest to the invention to the technical nature is a device for checking the operability of signal lamps, containing two switches, sensors, test and operating power sources are connected to the inputs of one of which, and the output of one switch is connected to signal lamps connected to the current sensor. current is connected to the first input of the BANNER element and one of the inputs of the OR element, the other input of which is connected to the output of the BANNER element and to one of the inputs of the memory block connected to the button, the other input The memory block and the input of the BANCH element are connected to the output of another switch, the input of which is connected to one of the inputs of one switch and to the output of the polling frequency setter, whose input is connected to the output of the OR element, the output of the memory block is connected to the light and sound indicators 2. The known device allows, practically without affecting the operation of signal lamps as part of an alarm system, to perform automatic search and highlighting of numbers of faulty signal lamps in a short time. However, the replacement of defective lamps requires a certain time, sometimes considerable. In a number of alarm systems, no loss of information on the state of the sensors (the presence or absence of a signal from them) is allowed for the period of replacement of defective signal lamps. The use of the known device in such alarm systems does not solve this problem and requires additional equipment for recording the status of sensors, for example, duplication of signal lamps. 1 22 The purpose of the invention is to increase the informativeness of the device for checking the operability of signal lamps by using a light indicator not only to highlight the numbers of malfunctioning signal lamps, but also to indicate the status of sensors corresponding to these lamps. The goal is achieved by the fact that the device for checking the health of signal lamps, containing a switch, the first inputs of which are connected to sensors, and the first outputs are connected to signal lamps, light and sound indicators, a BAN element, a polling frequency adjuster and a button, a selector is entered, the first and second counters, the trigger, the output of the polling frequency adjuster is connected to the first input of the first counter and the first input of the BAN element whose output is connected to the first input of the second counter and the second input of the switch, the second output the counter is connected to the first input of the light indicator, to the third input of the switch and the first b input of the selector, the remaining inputs of which are connected to sensors, the second output of the switch is connected to the first trigger input, the second input of which is connected to the first output of the first counter, the second output of which is connected to the second the input of the light indicator, the third input of which is connected to the output of the selector, the output of the trigger is connected to the fourth input of the light indicator, the second input of the first counter, the second input of the BAN element and the first input of the sound indicator, the second input of which is connected to the button. FIG. 1 shows a block diagram of a device for checking the operability of signal lamps; in fig. 2 - switch circuit is functional; in fig. 3 - light indicator circuit is functional. The device for checking the health of the signal lamps (Fig. 1) contains the switch 1, the signal lamps 2, the selector 3, the setpoint 4 of the polling frequency, the element BANE 5, the counters 6 and 7, the trigger 8, the indicator light 9, the sound indicator 10, the button 11. The switch 1, the first inputs of which receive signals from the sensors, is connected to the first outputs with signal lamps 2, the output of the dial 4 of the polling frequency is connected to the counting input of the counter 7 and the first input of the BANNER 5, the output of which is connected to the counting input of the counter 6 and the second input of the switch 1, out d counter 6 is connected to the first input of the light indicator 9, as well as to the third input of the switch 1 and the first input of the selector 3, the second inputs of which are connected to the first inputs of the switch 1, the second output of which is connected to the first input of the trigger 8, the output of which is connected to the second input the light indicator 9, the reset input of the counter 7, the second input of the prohibition element 5 and the first input of the audio indicator 10, the second input of which is connected to the button 11, the second input of the trigger 8 is connected to the first output of the counter 7, the second output of which n with the third input of the light indicator 9, the fourth input of which is connected to the output of the selector 3.

Switch 1 (Fig. 2) contains a group of elements AND-NO 12 with an open collector, a delay element 13, a resistance group 14, a decoder 15, a group of elements ORINE 16, an element OR 17.

The first inputs of the elements AND-NOT 12 receive signals from the respective sensors, the output of each element AND-NOT 12 is connected to the corresponding signal lamp 2, resistor 14 and the first input of the element OR-NOT 16, the second inputs of each of the elements AND-NO 12 and the ILINE 16 elements are connected to the corresponding outputs of the decoder 15, the first input of which is connected to the counter 6, and the second to the prohibition element 5 via the delay element 13, the outputs of the OR-NOT 16 elements are connected to the inputs of the OR element 17, the output of which is connected to a trigger eight.

The selector 3 is designed to form a sensor state signal corresponding to the monitored signal lamp 2. Integrated circuits, such as 133KP5, 133KP7, can be used as the selector.

The master oscillator 4 is designed to synchronize the operation of the device and determines the maximum switching frequency of the switch.

The BAN 5 element generates pulses that change the state of the counter 6 and gates the decoder 15 of the switch 1.

Counter 6 is a binary counter and is designed to generate a code that determines the number of the controlled signal lamp 2.,

Counter 7 is a binary counter and is designed to generate a time delay signal for switching counter 6 to the next state, and also determines the blinking frequency of indicator 9.

The trigger 8 is designed to store the malfunction signal generated by the switch 1.

 The light indicator 9 is intended to alternately highlight the numbers of defective lamps, as well as to indicate the status of sensors corresponding to these lamps.

The light indicator 9 (Fig. 3) consists of an AND-HE element 18, And 19 and 20 elements, a 21 segment de-selector, a group of digital indicator lamps 22. The number of digital indicator lamps is determined by the formula

n lgN,

where the number of digital indicator lamps, rounded up to a whole number; N is the number of monitored signal

lamp alarm system. The audible indicator 10 is intended to generate a sound signal in the presence of faulty signal lamps 2 (in the simplest case, a bell). Button And is designed to block the sound signal.

The device works as follows. In the absence of a prohibitory signal (logic level "1), coming from 5 trigger 3 to the input of the BANCH element 5, the state of the counter 6 cyclically changes with the frequency of the master oscillator 4. The state code of the counter 6 goes to the first input of the decoder 15 of the switch 1. On the second input of the decoder 15 About the switch 1 from the element BANGE 5 through the element 13 of the delay of the com switch 1 receives a pulse, strobe the output signal of the decoder. The inverted pulse (the outputs of the decoder 15 are inverse), 5 arriving at the inputs of the corresponding polled lamps of the elements AND-NO 12 and elements OR-NOT 16 of the switch 1, monitors the status of the signal lamp 2.

0 Element I-NOT 12 of the switch I under the action of a pulse from the decoder 15 of the switch 1 prohibits the passage of a signal from the corresponding sensor. Therefore, when the lamp is intact at the input of the corresponding element OR NOT 16 switch 1

there is a logic level "1 regardless of the state of the sensor. At the same time from the output of the element OR NOT 16 switch 1 to the input of the element OR 17 enters the level of logical "O. To the other entrances

element OR 17 of the switch 1 also receives signals logical "About from the outputs of the corresponding elements OR NOT 16 switch 1, since their second inputs receive levels logical" 1 from the inverse outputs of the decoder 15 of switch I. Therefore, when the monitored signal lamp 2 is healthy, the output of the OR element 17 of switch 1 does not show a fault signal. In this case, the trigger 8 is not cocked, and the prohibiting signal on

 The entry element BAN 5 is missing.

In addition, the lack of a signal from the output of the trigger 8 (the logic level “O) enters the input element And 19 of the light indicator 9 and prohibits the passage of the code from counter 6 to the decoder of 21 segments of the light indicator 9, thereby prohibiting its operation. The logical signal "About" from the output of the trigger 8 is also a reset signal for counter 7.

On the next impulse from the master oscillator 4, the counter 6 changes its state, a logical "O" signal appears at the next output of the decoder 15 of the switch 1 and the next signal lamp 2 begins to be monitored. With a good signal lamp, the signals flow as described.

If the next controlled lamp 2 is faulty, then at the first input of the corresponding element OR NOT 16 of switch 1 there is a logical level “0 and since its second input contains the level of logic“ O from the decoder 15 of switch 1, then at the output of the corresponding element OR NOT 16, and therefore - and the OR element 17 of the switch 1, a logical signal "1 (fault signal)" appears, which sets the trigger 8. The signal from the trigger 8 arrives at the input of the BAN 5 element and prohibits the passage of pulses from the master oscillator 4 at counter 6, i.e. stops the counter. In this case, the signal at the corresponding output of the decoder 15 of switch I disappears and the control of the lamp is stopped, thereby removing the malfunction signal from the trigger input 8.

The logical signal "1 from the output of the cocked trigger enters the input of the element And 19 of the light indicator 9 and permits the passage of the code from counter 6 to the decoder of 21 segments of the light indicator 9. At the same time, the number of the faulty lamp 2 determined by the state of the counter 6 is displayed on the light indicator 9 The signal from the output of the cocked trigger 8 permits the operation of the audible indicator 10, as well as the counter 7 (the logical signal "O from the reset input of the counter 7 is removed).

This state of the device is preserved until the reset signal of the trigger 8 from the output of the counter 7 appears. The conversion factor of the counter 7 is chosen so that the luminescence time of the information about the faulty lamp 2 is sufficient for the operator to perceive (about 2-10 seconds).

After resetting the trigger 8, the pulses of the master oscillator 4 to the input of the counter 6 are allowed to pass through the BAN 5 element, and when the counter 6 goes to the next state, the health of the warning lamps 2 continues. Thus, there is a cyclical survey of all signal lamps 2.

The selector 3 operates synchronously with the switch 1 and analyzes the state of the sensor corresponding to the signal lamp 2 being monitored. if the sensor is in the on state, the output of the selector 3 is a logical signal "1, which is fed to the input of the element AND NOT 18 of the light indicator 9 and allows the pulses from the output of the counter 7 to pass to the second input of the element 19 of the light indicator 9, The gates of the resolution signal to the light of the number of the faulty signal lamp, coming from the output of the trigger 8. The flicker frequency is set by a counter 7 on the order of 2-19 Hz.

The frequency of the master oscillator is chosen high enough. Therefore, a cyclic health check of each of

Signal lamps 2 have almost no effect on their mode of operation as part of a signal device.

In addition, due to the high frequency of the master oscillator, information about the faulty signal lamps 2 and the state of the sensors corresponding to these lamps is continuously displayed on the light indicator 9.

Thus, this device, like the prototype, automatically remotely searches for faulty ones.

0 signal lamps, the alarm system is not disturbed, since the lamps are monitored alternately and the off time of each lamp from the alarm system is carried out for a short time.

In addition, this device allows the operator to have information about the presence or absence of signals from the alarm system sensors corresponding to the defective signal lamps, at low cost in the equipment.

0 Expansion of the functionality of the device is carried out by introducing into the device a selector, as well as the element BAN, two counters and corresponding connections. A selector operating synchronously with the switch generates a signal that determines the state of the sensor of the signal lamp currently being monitored, which is fed to the indicator light and sets its mode of operation (flicker or steady light), i.e. on

the indicator light indicates the number of the faulty signal lamp in the constant glow mode when there is no signal from the corresponding sensor or in the flicker mode if there is a signal from the corresponding sensor. This is especially important for objects that prevent the loss of information on the state of the sensors, even for a short time, and in many cases the performance of operator functions or the location of signal lamps does not allow them to be quickly replaced.

Consequently, the use of this device in an alarm system increases its reliability as a whole, since the proposed device not only performs an automatic search for faulty warning lamps and flashes their numbers, but also indicates the status of warning lamps when they go out.

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Claims (1)

DEVICE FOR CHECKING THE SIGNAL LAMPS, containing the switch, the first inputs of which are connected to the sensors, and the first outputs - with warning lights, light and sound indicators, the element BAN, the interrogator of the polling frequency and a button, characterized in that, in order to increase the information content of the device; a selector, first and second counters, a trigger are introduced into it, the output of the polling frequency adjuster is connected to the first input of the first counter and the first input of the BAN element, the output of which is connected to the first input of the second counter and the second input of the switch, the output of the second counter is connected to the first input light indicator, with the third input of the switch and the first input of the selector, the remaining inputs of which are connected to the sensors, the second output of the switch is connected to the first input of the trigger, the second input of which is connected to the first output of the first a counter, the second output of which is connected to the second input of the indicator light, the third input of which is connected to the output of the selector, the trigger output is connected to the fourth input of the indicator, the second input of the first counter, the second input of the BAN element and the first input of the audio indicator, the second input of which is connected to the button .