SU1251146A1 - Alarming device - Google Patents

Abstract

The invention relates to automation, namely to devices for signaling and protecting monitored technological objects. The aim of the invention is to increase the informativity of the device. When the supply voltage is applied, unit 1 starts a sequential interrogation of the alarm cell 2, to the inputs of which sensors 23 are connected. If any sensor 23 is triggered, the corresponding light 29 lights up, the start block 1 stops and the buzzer turns on and turns on 5 confirmation body. With the aid of the acknowledgment unit 4, the warning lamp 29 can be switched off and the device returns to its original state. In addition, there are two channels for forming alarms and blocking block 1: the first channel contains memory element 27, element OR 7, key 13, one-shot 34, memory element 36 and element OR NOT 10, and the second one element OR 6, memory element 11, key 14, one-shot 35, memory element 37, element OR-NOT 9. If any element fails in one of the channels, the output signal of the EXCLUSIVE OR indicates a logical signal "1 and the warning lamp 17 lights up. Authority 3 performs a check of all of the warning lights 29 and 17. 2 CI ff, 2 ill. I (L Yu O1 4 O5 Fig1

Description

The invention relates to automation, namely to devices for signaling and protecting monitored technological objects.

The aim of the invention is to increase the information content of the device.

FIG. 1 is a diagram of an alarm device; pas figs. 2 is a diagram of the launch unit.

The device for the alarm contains a start-up block 1, alarm signaling cells 2, a key of control of light indicators, keys 4 and 5 of acknowledgment, elements OR 6 and 7, elements OR-NOT 8-10, memory element 11, element EXCLUDE10

and are supplied to the S-inputs of the memory elements 36 and 37, which remain in the zero state, providing the disabled state of the controlled key 39. Since at both inputs of the EXCLUSIVE OR 12 element the signals are equal in value, the output which through the element OR - NOT 8 provides the disabled state of the warning lamp 17.

After starting block 1, signals "1" are sequentially generated at its outputs 21 at certain time intervals, which, at the inputs of the elements AND 26 of the signaling cells 2, enable the monitoring of these cells for OR 12, controlled keys 13 and 14 15 of the sensor signals 23. If after entering20

thirty

35

with closing contacts 15 and 6, respectively, the warning lamp 17, the audible signaling unit control unit 18, the power bus 19, the HE element 20, the outputs 21 of the start-up unit 1, the HE elements 22, 23 sensors 23 signals, the drivers 24, delay element 25, elements AND 26, memory elements 27, elements OR-NOT 28, light signaling devices 29, inputs 30 and 31, and outputs 32 and 33 of block 18, single-oscillators 34 and 35, memory elements 36 and 37, element 25 OR-NOT 38, with a rotary key, key 39 with contact 40.

The start-up unit 1 contains buttons 41 and 42, a relay 43 with a closing 44 and switching contacts 45, delay elements 46, elements AND 47, a positive bus 48 and a common power supply 49, a delay element 46 containing a comparator 50, resistors 51-54 , capacitor 55, dcode 56. The alarm device operates as follows.

In the initial state, after turning on the power, at the output of 21 volts of the 1 start current, the signals "O" are set. Opi apes 4 and 5 handshaking and the light control key 3 form the “1. The output signals of the trigger unit 1, arriving at the first inputs of the AND elements 26 of each signaling cell 2, block the passage of signals from the sensors 23 to the S inputs of the memory elements 27 and through the OR element 6 to the S input of the memory element 11. Thus, independently From the state of the sensors 23, the elements of the memory 27 and 11 remain in the bullet state, providing the disabled state of the indicator lights, including the state of the controllable keys 13 and 14 and the closed state of their contacts 15 and 16. At the input block 1 runner receives a non-prohibitive signal to block 1. From the outputs of the memory elements 27 through the OR element 7 and from the output of the memory element 11, "O" goes to both inputs of the EXCLUSIVE OR 12 element and simultaneously through the inputs 30 and 31 of the sound control unit 18 to the inputs of its single-shot 34 and 35 , the outputs are formed signals "On

40

50

55

If the output of unit 1, block 1, 1 to the first input of the element AND 26 of any cell 2 of the alarm is triggered by a sensor connected to the input of this cell, the driver 24 provides the supply of “1 through delay element 25 to the second input of the element 26. At the output of this The element appears in this case "1, arriving simultaneously at the S-inputs of the memory element 27 (corresponding cell 2 of the alarm) and through the element OR 6 of the memory element 11, and translates these memory elements into an excise state. From the output of the memory element 27, "1 through the element OR-HE 28 turns on the warning lamp 29 and through the element OR 7 turns off the control key 13, and" 1 from the output of memory element 1 turns off the control key 14. At the same time, contacts 15 and 16, at the input of block 1, a signal is set to reset it to the initial state, and at all outputs 21 of block 1, the signals take the value "O, which, acting on AND 26, block the passage of signals from all sensors 23 to the S-inputs of memory elements 27 and 11, therefore the state of the remaining memory elements 27 does not change. ozhet. This ensures that the root cause that triggers the alarm is fixed.

Simultaneously with the disconnection of the controlled keys 13 and 14, "1 are sent to both inputs of the EXCLUSIVE OR 12 element and through the inputs 30 and 31 of the block 18 to the inputs of its one-shot 34 and 35. At the output of the element 12, the signal remains equal to" 0 " -previously, it is turned off, and the one-shot 34 and 35 are formed at their outputs by one pulse equal to the value “1. These pulses, arriving at the S-inputs of memory elements 36 and 37, put them into a single state. The output signals of these memory elements, via the OR-HE 38 element, provide for switching on the key 39, which by its contact 40 closes the power supply circuit of the audible alarm device. In addition, "1 from the output of the memory element 36 through the output 32 of the block 18 is fed to the second input of the element OR

and are supplied to the S-inputs of the memory elements 36 and 37, which remain in the zero state, providing the disabled state of the controlled key 39. Since at both inputs of the EXCLUSIVE OR 12 element the signals are equal in value, the output which through the element OR - NOT 8 provides the disabled state of the warning lamp 17.

After starting block 1, signals "1" are sequentially generated at its outputs 21 at certain time intervals, which, upon entering the inputs of the elements AND 26 of the signaling cells 2, enable the control of these cells for the state of the signals of the sensors 23.

If the output of unit 1, block 1, 1 to the first input of the element AND 26 of any cell 2 of the alarm is triggered by a sensor connected to the input of this cell, the driver 24 provides the supply of “1 through delay element 25 to the second input of the element 26. At the output of this The element appears in this case "1, arriving simultaneously at the S-inputs of the memory element 27 (corresponding cell 2 of the alarm) and through the element OR 6 of the memory element 11, and translates these memory elements into an excise state. From the output of the memory element 27, "1 through the element OR-HE 28 turns on the warning lamp 29 and through the element OR 7 turns off the control key 13, and" 1 from the output of memory element 1 turns off the control key 14. At the same time, contacts 15 and 16, at the input of block 1, a signal is set to reset it to the initial state, and at all outputs 21 of block 1, the signals take the value "O, which, acting on AND 26, block the passage of signals from all sensors 23 to the S-inputs of memory elements 27 and 11, therefore the state of the remaining memory elements 27 does not change. ozhet. This ensures that the root cause that triggers the alarm is fixed.

Simultaneously with the disconnection of the controlled keys 13 and 14, "1 are sent to both inputs of the EXCLUSIVE OR 12 element and through the inputs 30 and 31 of the block 18 to the inputs of its one-shot 34 and 35. At the output of the element 12, the signal remains equal to" 0 " -previously, it is turned off, and the one-shot 34 and 35 are formed at their outputs by one pulse equal to the value “1. These pulses, arriving at the S-inputs of memory elements 36 and 37, put them into a single state. The output signals of these memory elements, via the OR-HE 38 element, provide for switching on the key 39, which by its contact 40 closes the power supply circuit of the audible alarm device. In addition, "1 from the output of the memory element 36 through the output 32 of the block 18 goes to the second input of the ILINE 10 element, and from the output of the memory element 37 through the output 33 to the second input of the OR-NOT 9 element, which ensures blocking the effect of the key 4 handshaking on the R-inputs of the memory elements 27 through the element OR-NOT 10 and on the R-inputs of the memory element

11 through the OR-NOT element 9. Therefore, the possibility of erroneous switching off of the warning lamp 29, which indicates the deviation of the technological parameter from the norm, is eliminated even if the previously operated sensor returned to its initial state at the time of acknowledgment. With the aid of an acknowledgment key 5, "O" is applied to the R-inputs of the memory elements 36 and 37, which then return to the zero state, turning off the buzzer. The signals "O from the outputs of the memory elements 36 and 37 are fed to the second inputs of the elements OR-NOT 9 and 10. Thereafter, if using the key 5 of the acknowledgment signals" Oh and to the first inputs of the elements OR-NOT 9 and 10 are sent, then formed at their outputs "1" and received at the R-inputs of the memory elements 11 and 27 will transfer them to the zero (initial) state. In this case, the switched on light 29 is turned off, keys 13 and 14 are turned on, and their contacts 15 and 16 are closed, i.e. The alarm circuit has returned to its original state.

From the description of the operation of the device for the alarm, it can be seen that the scheme consists of two channels reserved permanently to form the alarm signal and block the start-up unit 1. The first channel is formed by the memory elements 27, the OR element 7, the key 13 with the contact 15, the one-oscillator 34, the memory element 36, the element OR-NOT 10; the second is the element OR 6, the memory element 11, the key 14 with the contact 16, the one-shot 35, the memory element 37, the element OR NOT 9. The failure of any element in one of the channels will inevitably lead to the signals at the inputs of the EXCLUSIVE OR element

12 become different in value (one of them is “1, and the other is“ O ”) and at the output of this element a signal“ 1 ”is formed, which through the element OR-NE 8 turns on the warning lamp 17, informing about the malfunction in the device.

The faulty OR-HE elements 8 and 28, the annunciators 29 or 17 are detected using the control key 3. Formed by the key 3 "O ensures the inclusion of all the warning lights 29 and 17. By turning off the indicator light you can judge the location of the fault. The memory elements of the alarm device, made on the trigger, should take priority over input S. Therefore, if the acknowledgment key 4 fails or its circuit, the alarm device remains operational, since after switching the memory elements 36 and 37 on the signals from the sensors 23, the signals with 5 keys 4 elements OR-NOT 9 and 10 are blocked in one state. Key 4 is detected when the sound signal is acknowledged by key 5. Key 5 of the handshake or its circuit can be detected ie only lead to failure of operation of the control unit 18

 beeper. The operation of the rest of the alarm device circuit is not impaired, and when the indicator lights of the signaling cells 2 are turned on, a failure is detected

5 elements 5.

Unit 1 run works as follows.

After switching on the supply voltage of unit 1, relay 43 is de-energized, its contact 44 is open, contact 45 is closed with a total bus power supply 49 and "O is fed to the input of the first delay element 46, output 21 (Qi) of unit 1 and through elements 47 to all the remaining outputs 21 (Qa ... Qn) of block 1. As the input of delay element 46 has

5, "O, then the capacitor 55 is discharged and at the non-inverting input of the comparator 50, the voltage is below the threshold value, therefore, at the output of the comparator 50 and the first delay element 46, the signal is" O, which is fed to the input of the next

0 delay element 46, ensuring the formation of “O at the output of this element. Thus, "O at the outputs of all the delay elements 46 are formed and fed to the second inputs of the AND 47 elements. When the start button is pressed, the start power supply and the presence of the positive supply voltage at the input 1 of the relay 1 are triggered. Contact 44 is closed by locking the button 42 "Start, holding the relay 43 in the actuated state. Simultaneously, contact 45 is switched to close

0 with a positive power 48 bus. At the same time, "1 is fed to the output 21 (Qi) of block 1, the input of the first delay element 46 and the first inputs of the And elements 47, the outputs of which are stored" O, since at their second inputs there is an "O.

5 After the first delay element 46 '1 arrives at the input, its capacitor 55 is charged through a resistor 52 with a constant time proportional to the resistance of the resistor 52 and the capacitance of the capacitor 55,

Q while the diode 56 is closed. After the time expires, the capacitor 55 is charged to a voltage equal to the threshold value of the comparator 50, after which the signal at its output takes the value "1", which is fed to the second input of the corresponding

Element 5 And 47. Since at its first input there is already " 1, " at its output and output 21 (Qa) is formed " 1. Further, similarly to the first delay element 46, the following 1 delay elements 46 are successively formed on the remaining outputs 21 (Q3 ... Qn). Thus, after pressing the Start button 42, "1 instead of" O on all outputs 21 block 1 run. If the positive voltage at the input of block 1 is turned off or the button 41 is pressed, the stop relay 43 is turned off, and the contact 44 is opened, which unlocks the start button 42 and additionally breaks the power circuit of the relay 43. At the same time, contact 45 switches from the positive bus 48 to the common power bar 49, feeds "O at the same time to the input of the first delay element 46, output 21 (Qi) of block 1, and through the elements OR 47 and to all other outputs 21 (QJ, ... QTI) of block 1. In addition , "O, arising at the input of the delay element 46, provides a discharge capacitor 55 through the opened diode 56 and low-impedance resistor 51. Therefore, the voltage at the non-inverting input of the comparator 50 drops, its decrease below the threshold value leads to the formation of "O at the outputs of the comparator 50 and the first delay element 46. Next, the formation of" O at the outputs of all delay elements 56, i.e. block 1 is returned to its original state.

Claims (3)

1. Device for alarm signaling bus power supply, control key of indicator lights, first acknowledgment key, light signaling device, signal sensors whose outputs are connected to the first inputs of the corresponding signaling cells, each of which contains a signal conditioner whose input is the first input of the cell. signaling element, a delay element, an OR-NOT element, a NOT element, a memory element, the first input of which is connected to the output of the AND element, and the output is the first output of the signaling cell, which is connected With the corresponding input of the first OR element, the output of which is connected to the first input of the sound alarm control unit, the second output of each signaling cell is connected to the corresponding input of the second OR element, characterized in that, in order to increase the informativeness of the device, a trigger unit is inserted into it. memory element, element NOT, first, second and third elements OR-NOT, first and second controlled keys with closing contacts, second key of acknowledgment, element EXCLUSIVE OR, and in each cell of the alarm it is oic switch having an input connected to the output of OR-NO element, one input of which is connected with the output of the memory element and the other with the output of the NOT element, whose input is the second input of the alarm cell, the second input of the memory element is the third input of the signaling cell; in each signaling cell, the output of the signal conditioner is connected via the delay element to the first input of the AND element, the second input of which is the fourth input of the signaling cell; the fourth inputs of all the alarm cells are connected to the corresponding outputs of the trigger unit, the input of which is connected through serially connected contacts of the first and second controlled keys are connected power supply, the input of the first controllable key is connected to the output of the first element OR and the first input of the EXCLUSIVE OR element, the second input of which is connected to the input of the second control key, and the output to the first input of the first element OR NOT, the output of which is connected to the light input the detector, the second input of the first element OR is NOT connected to the output of the element NOT, the input of which is connected to the second inputs of all the cells of the alarm and the output of the light control key, the third inputs of all the cells of the alarm are connected to the output the second element OR NOT, the first input of which is connected to the output of the first acknowledgment key and to the first input of the third the OR-NOT element, the second input of which is connected to the first output of the control unit by a sound alarm device, the second output of which is connected to the second input of the second OR-NOT element, the output of the second OR element is connected to the first input of the memory element, the second input of which is connected to the output of the third element OR NOT, the second input of the control unit with a sound detector is connected to the output of the memory element and to the second input of the EXCLUSIVE OR control unit, the second acknowledgment key is connected to the third input of the control unit of the sound signaling device. 2. The device according to claim 1, characterized in that the sound signaling control unit comprises first and second one-oscillators, first and second memory elements, an OR-NOT element and a control key with a closing contact, the control key input is connected to the output of an element OR, whose inputs are connected to the corresponding outputs of the memory elements, the first inputs of which are connected to the corresponding outputs of one-shot, and the second inputs are combined and are the third input of the control unit with a sound signaling device, the inputs of the first and second The one-shot are respectively the first and second inputs of the sound alarm control unit; the outputs of the first and second memory elements are respectively The first and second outputs of the control unit are a sound signaling device. 3. The device according to claim 1, characterized in that the start-up unit contains a "Stop and Start" button, a relay with closing and switching contacts, a positive and common power supply bus, delay elements and AND elements, the first inputs of which are combined and are the first output the start block, the second inputs of the elements And are connected to the outputs of the corresponding delay elements connected to the positive and common The power supply ports, to which the first and second outputs of the switching contact of the relay are also connected, the third output of which is connected to the input of the first delay element and the first output of the start-up unit, the common bus is connected to the single output winding terminal through parallel connected button the other pin of which is connected to one pin of the Stop button, the other pin of which is the input of the trigger unit, the outputs of the AND elements are the other outputs of the trigger block. 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