SU875393A1 - Device for monitoring parameter automatic stabilizing system - Google Patents

Description

(54) DEVICE FOR MONITORING THE SYSTEM

AUTOMATIC STABILIZATION OF PARAMETERS

I

The invention relates to the automatic control of automatic stabilization systems and can be used in systems of centralized control and management of technological parameters.

A device for controlling automatic stabilization systems is known that ensures the formation of an alarm signal when a stabilized process parameter is out of acceptable limits. An alarm signal is formed in it at each parameter output outside the tolerance field. The disadvantage of such a monitoring device is the reliability of detection of emergency situations, since the output of the parameter tolerance does not mean that this situation has arisen.

The closest in technical essence to the proposed is

A device for monitoring an automatic stabilization system for technological parameters, comprising a normalizing converter connected to the comparison unit and AND and OR elements, as well as a pulse generator, first and second pulse counters, one of the comparison unit outputs connected to the input of one AND element, the second input of which connected

10 to the output of the pulse generator, and you-, the course - to the input of the first pulse counter, the output of which is connected to the reset bus of the second pulse counter, the input of which is connected to the output geg

15 pulse oscillator. The output of the second counter is connected to the inputs of other elements AND, the second inputs of which are connected to the corresponding outputs of the comparison unit and connected through 30 the second element OR to the reset bus of the first pulse counter, and the outputs connected to the first element OR, the other inputs of which are connected to the corresponding outputs of the comparison unit .. This device improves the accuracy of detecting an emergency situation by recognizing and screening out short-term, rarely repeated detection of the parameter output signals beyond the permissible limits p2} Failure The device's attribute is the possibility of using it only to control automatic stabilization systems for long-lasting technological parameters. When the set value of the parameter being stabilized (mode change) changes (for example, software), this device generates a false alarm. In addition, it does not provide the detection of deviations from the calculated values of the dynamic characteristics of the controlled automatic system for stabilizing the technological parameters, which reduces the reliability of the control. The purpose of the invention is to increase the reliability of the control device. This goal is achieved by the fact that the device for monitoring the system of automatic stabilization of parameters, containing an analog-code converter connected by an input to the input of the device, and an output through the comparison unit to the first input of the first element I, connected by the second input to the first inputs of the second and third elements And, to the first output of the device and to the output of the counter, the first input of which is connected to the output of the second element And connected to the second No. 1 input with the output of the pulse generator, the element is entered into it The serial and first connected settings register, the second settings register, the incremental code calculation block and the time code block,. connected by the output to the second input of the counter, and the second input to the output of the first element And, the delay element is connected to the output of the comparison unit, and the output to the second inputs of the third And element and the incremental code calculator connected by the third input to the second output of the first settings register and to the second input of the comparison black. The drawing shows a block diagram of the device. The device contains successively connected normalizing converters analog-code maker, comparison unit 2 and first OF element, 4 pulse generator, second And 5 element, counter 6, third And 7 element, delay element 8, first 9 and second 10 setting registers, block 11, the incremental code calculation and the time code block 12. The device works as follows. The signal corresponding to the value of the parameter being stabilized, through the converter 1, the analogue code in a normalized digital form is fed to the input of the unit 2 comparing the actual value of the parameter with the set (setpoint) received from the first register 9 of the setpoint. When the system operates without changing the stabilization mode (changing the setpoint value) and if the technological parameter values deviate within the tolerance field, the output of the additional code calculating unit 11 produces a zero value of the additional code, and the counter 6 is in the zero state. The output signal of the zero state of the counter b prohibits the passage of signals from the pulse generator 1 through the second element 5 to the input of the counter 6, and prepares the first 3 and third 7 elements I for propagating the signals. If the value of the parameter goes beyond the limits of the tolerance field, the output of the comparison 2 blink appears - the signal coming through the open first element 3 in the time code block 1.2, c. which stores the code corresponding to the permissible time for the parameter to go outside the dojuska field. The signal from the output of the first element And 3 adds this code to the output code (in this case, zero) of the incremental code calculation unit 11 and, in the additional code, is entered into counter 6. The signal of a nonzero state of counter 6 opens the second element 5 and generates The repeater begins to fill the counter 6. At the same time, the output signal of counter 6 locks the first 3 and third 7 elements AND, thereby eliminating the secondary recording of the time code tg in counter 6 and the passage of the signal of the parameter's output beyond the tolerance field from the output of element 8 buckle for controlling the output device prior to filling the counter 6 (the time the reference time interval tg). If the value of the parameter being stabilized does not return to the tolerance field by the moment of resetting the counter 6, or again goes beyond the permissible limits, the output signal of the comparison unit through the delay element and the open third element 7 passes to the output of the control device, which is: a sign of an alarm condition No system for automatic stabilization of paameters. t. When the stabilization mode changes from the set of device system I to the first register 9 of the setpoint, the new value of the parameter Pc of the parameter P and the previous value of the setpoint P is transferred from to the second register 10. At this level; At the output of the block 11 of the code addition calculation, a code is formed that compiles the estimated time for the flow of the transition process in the system (adjustment time): - -; tp kup, LR 1 RI-RP (where k is co-equilibrium of proportionality (generally, alternation). If, after changing the setpoint on the input of the comparison unit 2, a parameter output signal appears outside the tolerance field, in time code block 12 is formed and entered counter 6 is an additional code corresponding to the sum of the permissible time for the parameter to go beyond the permissible limits t and adjustments tp. After the time determined by the 3jje 8 delay, a signal appears at its output, resetting the code of the incremental code calculator 11 to zero During the filling of counter 6 (counting the time interval tg + tp, the occurrence of an alarm at the output of the monitoring device is blocked in the same way. If at the moment of zeroing of the counter 6, the deviation of the stabilized parameter from the new value of the setpoint Rc exceeds the permissible output at the output of the monitoring device, the alarm CHrHanj is formed indicative of a malfunction of the automatic stabilization system or on the inconsistency of its dynamic characteristics with the calculated values, i, to coordinate the operation of the driver Effects of the system with the operation of the Control Device from the output of the counter .6 into the system device's task, a signal prohibiting a change in the operating mode of the system in case of a nonzero state of the counter 6. Thus, the introduction of additional units with the specified connections into the control device allows increasing the reliability control when changing the mode of the automatic system of stabilization of parameters, which allows it to be widely used in automated process control systems 4 An apparatus for controlling an automatic stabilization system for modules, containing an analog-code converter connected by an input to the device input, and an output through a comparison unit to the first input of the first And element connected by the second input to the first inputs of the second and third And elements to the first end of the device and to the output of the counter, the first input of which is connected to the output of the second element I, connected by the second input to the output of the pulse generator, which differs from I in that, for the purpose of validity, control devices, a delay element and serially connected per ryu settings register, a second settings register, an incremental code calculation block and a time code block connected by an output to the second counter input, and a second input to the output of the first And element, are entered in it; the delay element is connected to the output the comparison unit, and the output - to the second inputs of the third element And and the block for calculating the incremental code connected by the third input to the second output of the first register of settings and to the input of the comparison unit. Sources of information taken by the IN attention during the examination 1. USSR author's certificate No. 189929, cl. G 06 F I52A6, 1964. 2. USSR author's certificate No. 614441, cl, G 06 F 15/46, 1978 (prototype).

Claims (1)

Claim A device for monitoring the automatic stabilization system of parameters containing an analog code converter ²⁵ connected to the input of the device input and output through the comparison unit to the first input of the first element And connected by the second input to the first inputs of the second 30 and third elements And to the first the output of the device and the output of the counter, the first input of which is connected to the output of the second AND element, connected by the second input to the output of the pulse generator, characterized in that, in order to increase the reliability. I’m a device, a delay element is introduced into it and the first 40 register of settings, a second register of settings *, an additional code calculation unit and a time code block connected by the output to the second input of the counter, and the second input to the output 45 of the first element And, the element the input delay is connected to the output of the comparison unit, and the output to the second inputs of the third AND element and the additional code calculation unit, connected by the third input to the second output of the first register of settings and to the input of the comparison unit.