SU643932A1 - Process off-normal conditions signalling device - Google Patents

Description

The invention relates to the field of signaling the progress of the technological process, protecting equipment from emergency situations and can be used in control systems and alarms for objects that have on-off control units. Devices are known for signaling the state of a monitored object, its malfunctions 1. The disadvantages of the known devices are their complexity with a large number of monitored parameters. The closest in technical solution is the device described in 2 and adopted as a prototype containing BANKS, the output of the inverting power amplifier of the first of which is connected to the signal lamp, the output of the second element BANNER connected to the input of the power amplifier, the output of which is connected to an audible alarm, a delay element, two pulse generators, the outputs of which are connected to the same inverter inputs of the second element BANGE, non-emergency and alarm signal fault buses and alarm signals bus state executive. The disadvantage of the prototype is its limited functionality. This is due to the fact that when implementing a group technological signaling system, for example, for objects of the same type, each of which has a fixed number of faults, this number of signaling cells is required, how many parameters and indicators on this object that have the ability to cause process disturbances or an emergency situation . This leads to an unjustified increase in the applied technical means, thus complicating the alarm system, and impairs the reliability characteristics of its operation. In addition, the specified device does not provide an indication of violations of the state, the executive bodies and their malfunctions, which can also cause an emergency situation. It is also not provided that this alarm is turned off for the period of control of the changeover of the executive bodies.

The purpose of the iso-steppes is to expand the junction of the first possibilities of the cell of the computer and of the third one.

process.

P (TCT avleina goal is achieved by the fact that

in the alarm device additionally

AND elements are installed, three elements OR

th TriGGer, which vhbd podtotovki connect nyet1 with v1h6dom element of the delay, output

l-phrrepa and connected to one input of the second

the BANCH element, the inputs of the AND element are connected to the signal busses of the state of the executive bodies, the output of the AND element is connected to the input of the first BANNER element, the inputs of the first OR element are connected to the alarm buses of non-emergency xapaWepa., the output of the first OR element is inverted the power amplifier, the first element BAN, the output of the second element OR is connected to another input of the second element BAN, and the signal 111IN1 1 emergency faults are connected to the inputs of the third element OR, the output to the input of inverter kotorogopodklyuchen second element inverted.

BjTOK-cxeMa of the proposed process alarm signaling cell is shown in the drawing. The scheme contains the elements OR 1, 2 and 3, the element AND 4, the elements BANKS ,, the first - on the inverter 5 and inverting power amplifier, 6, and the second - on the inverters 7, 8, 9 and 10, power amplifier 11, inverter 12, two pulse generator 13 and 14, delay element 15, trigger 16, signal lumina 17, loudspeaker 18 and signal lines 19, 20 and 21, respectively, of malfunctions of non-emergency and emergency nature and condition of technical agencies.

The device works as follows.

The input of the element OR 1 is signaled by a set of signals about malfunctions that are capable of disrupting the course of the technological process without causing an emergency situation. Element 4 is connected to its input with signal buses of 21 states of the executive bodies. When

the inconsistencies of the state of the executive Hacks with their correct entry position

 the first BREAD scheme, formed by the inverter with the invertor amplifier 6, post;, the signal of zero level and the signal lamp 17 lights up. The lamp also lights up when the element enters the input. I, OR signals of faults non-failure Mori character. To the second input of the inverter 5, a single signal can be received to turn off the signaling of inconsistency with a PREPARE 1TCHTT7TWY org.

progdem.ti auxiliary operations. This is the power amplifier 6 power amplifier 6 used to control the lamps.

When signal signals are received (alarm faults of pipa 20, as well as the state bodies inadequate to the executive bodies, their correct position at the output of the OR 2, 3 elements appears at the unit level signal, and at the output of the inverter 10 forming with inverters 7, 8 and 9 the second element BANGE, a pulsating voltage appears with a generator frequency of 13, sufficient for loudspeaker 18. At the same time, the pulse generator 14 generates a generation frequency several orders of magnitude smaller than the generator 13, creating The loud sound of the loudspeaker 18 turned on through the power amplifier 11. A single signal to turn off the alarm for the duration of auxiliary operations on one or several objects is simultaneously fed to the inputs of inverters 5 and 12 and the counting input of trigger 16. At the same time, the output signal of delay element 15 and trigger 16 are reset. At the end of the auxiliary operation, the output signal of the trigger 16 changes to an inverse one and the delay element 15 is turned on for a delay time slightly exceeding conductive. time of complete permutation of the executive bodies. After the delay element triggers, a single signal is applied to the reset input of the trigger 16 and the trigger returns to the initial state. If there is also a single signal at the output of the OR 2 circuit, the output signals of elements 7, 8, 9, 10, and 11 are successively inverted and alarming sounds. Thus, the state of the executive bodies of the objects is monitored.

This device can be used in control and regulation systems when building alarm subsystems. The use of a fault signaling cell allows you to more quickly perceive information about violations of the process mode, take measures to eliminate them and prevent emergency situations.

Claims (2)

1. USSR Author's Certificate No. 342205, cl. G 08 B 23/00, 1972. 2. Described alarm cells. Collection "Automation of chemical processes, vol. 3, 1975. f A 1 11T 16 P1 1 $