SU901993A1

SU901993A1 - Device for automatic technical parameter regulation

Info

Publication number: SU901993A1
Application number: SU792859928A
Authority: SU
Inventors: Александр Иванович Васильев
Original assignee: За витель А. И. Васильев t и Ji Ь«; Wi. V J
Priority date: 1979-12-25
Filing date: 1979-12-25
Publication date: 1982-01-30

Description

Изобретение относится к приборострсн ению и.может быть использовано для си·, стем автоматического регулирования параметров объектов с большой инерционное тью, например в регуляторах температуры.The invention relates to instrumentation and can be used for systems · of automatic control of parameters of objects with a large inertia, for example, in temperature controllers.

Известно регулирующее устройство, ⁵которое обеспечивает требуемый закон регулирования [1].Known regulatory device, ⁵ which provides the required regulation law [1].

Однако такое устройство, являясь достаточно сложным, требует больших за-* трат в производстве и эксплуатации, ¹⁰ However, such a device, being quite complex, requires large costs * in production and operation, ¹⁰

Известно также устройство для автоматического регулирования параметров, содержащее последовательно соединенные уравновешенный измерительный мост, усилитель и двигатель, вал которого связан *⁵с управляющими контактами, включенным^ последовательно с обмотками двух исполнительных реле, первые нормально разомкнутые контакты которых включены в цеп^ управления исполнительным механиз- ²⁰мом, и источник питания [2].A device for automatic control of parameters is also known, containing a balanced measuring bridge, an amplifier and a motor connected in series * ⁵ with control contacts connected in series with the windings of two actuating relays, the first normally open contacts of which are included in the actuator control circuit ²⁰ mom, and a power source [2].

Недостатком указанного устройства является большое перерегулирование при большой инерционности объектов управления.The disadvantage of this device is a large overshoot with a large inertia of the control objects.

Цель изобретения - повышение качесъ. ва регулирования.The purpose of the invention is improving the quality. wa regulation.

Поставленная цель достигается тем, что в устройство введен сигнализатор равновесия измерительного моста, перво© реле снабжено вторыми нормально разомкнутыми контактами и нормально замкнутыми контактами, второе реле снабжено вторыми и третьими нормально разомкнутыми контакатами, при этом вход сигнализатора равновесия подключен к выходу усилителя, выход - к управляющим контактам, вторые контакты обоих реле соединены параллельно и включены между источником питания и выходом сигнализатора, нормально замкнутые контакты первого реле включены последовательно с датчиком параметра, а третьи контакты второго реле - параллельно датчику.This goal is achieved by the fact that the equilibrium signaling device of the measuring bridge is inserted, the first © relay is equipped with second normally open contacts and normally closed contacts, the second relay is equipped with second and third normally open contacts, while the input of the equilibrium signaling device is connected to the output of the amplifier, the output to control contacts, the second contacts of both relays are connected in parallel and connected between the power source and the output of the detector, normally closed contacts of the first relay are on cheny parameter series with the sensor, and the third contacts of the second relay - parallel to the sensor.

Не чертеже представлена схема устройства для автоматического регулирова, ния технологических параметров.Not shown is a diagram of a device for automatic control of technological parameters.

Устройство содержит уравновешенный измерительный мост 1, в одно из плеч которого включен датчик контролируемого параметра (не показан). Выход моста· через усилитель 2 соединен с двигате- g лем 3. Вал двигателя 3 связан с управ-1 ляющими контактами 4 и 5, соединенными с обмотками исполнительных реле и 7. К выходу усилителя 2 подключен сигнализатор 8 равновесия измеритель- ю ного моста 1. Выход сигнализатора 8 равновесия соединен с управляющими контактами 4 и 5 и через нормально разомкнутые контакты 9 и 10 реле 6 и 7 - с источником питания. Другие нормально 15 разомкнутые контакты 11 и 12 этих реле включены к цепь управления исполнительным механизмом (не показан), а нормально замкнутый контакт 14 реле 6 и третий нормально разомкнутый контакт 20 13 реле 7 включены соответственно последовательно и параллельно в Цепь дат чика параметра.The device contains a balanced measuring bridge 1, one of the shoulders of which includes a sensor of a controlled parameter (not shown). The output of the bridge · through amplifier 2 is connected to motor g 3. The shaft of motor 3 is connected to control contacts 4 and 5 connected to the windings of the executive relays and 7. To the output of amplifier 2, an equilibrium indicator 8 of measuring bridge 1 is connected The output of the equilibrium detector 8 is connected to the control contacts 4 and 5 and through the normally open contacts 9 and 10 of the relay 6 and 7 - with a power source. The other normally 15 open contacts 11 and 12 of these relays are connected to the actuator control circuit (not shown), and the normally closed contact 14 of relay 6 and the third normally open contact 20 13 of relay 7 are connected, respectively, in series and parallel to the Parameter sensor circuit.

Устройство работает следующим обра-_; & зом,The device operates as follows _; & zom,

При отключении действительного'значения параметра от заданного, например, в большую сторону замыкается контакт 5, срабатывает реле 7, которое включа- 30 ет исполнительный механизм в режим уменьшения параметра. Одновременно контакты 13 замыкают датчик параметра, И двигатель начинает вращаться с номинальной скоростью, перемещая уравяове- & шйватощий элемент моста к нулевой точке. При вхождении уравновешивающего элемента в зону допустимых значений параметра контакт 5 размыкается, реле размыкает свои контакты и исполнительный механизм отключается. Уравно вешивающий элемент начинает перемещать^, ся в обратном направлении до положения, соответствующего действительному значению параметра. Если оно больше допус-₄₅тимого, то при остановке уравновешивающего элемента срабатывает сигнализатор равновесия и реле 7, которое снова включает исполнительный механизм и за^. 'мыкает датчик. ₅₀ When the actual value of the parameter is disconnected from the set value, for example, terminal 5 closes to the larger side, relay 7 is activated, which switches the actuator 30 to the parameter decrease mode. At the same time, contacts 13 close the parameter sensor, AND the engine starts to rotate at the rated speed, moving the equal-to-tight shaft element to the zero point. When the balancing element enters the zone of permissible values of the parameter, contact 5 opens, the relay opens its contacts and the actuator switches off. The counter-balanced element begins to move ^, in the opposite direction, to the position corresponding to the actual value of the parameter. If it is greater than ₄₅ dopus- timogo, when stopping the balancing item of balance switch is triggered and the relay 7, which again includes an actuator and ^. 'pokes the sensor. _fifty

Указанные циклы продолжаются до тех пор, пока значение параметра не войдет в допустимые пределы.The indicated cycles continue until the parameter value falls within the permissible limits.

Такой режим работы регулирующего устройства исключает большое перерегулирование.This mode of operation of the control device eliminates large overshoot.

Claims

(54) DEVICE FOR AUTOMATIC REGULATION The invention relates to instrumentation ENTs. It can be used for automatically adjusting the parameters of objects with large power supply, for example in temperature controllers. A regulating device is known that provides the required control law 1, However, such a device, Sophisticated enough, requires a lot of cost in production and operation. It is also known a device for automatic control of parameters comprising a series-connected balanced measuring bridge, a ycBj relay and a motor whose shaft is connected to control contacts connected in series with the windings of two executive relays that are included in the control circuit of the actuator and power source G23. The disadvantage of this device is a large overcontrol with technological parameters of high inertia of control objects, the purpose of the invention is to improve the quality. WA regulation. The goal is achieved by the fact that the equilibrium detector of the measuring bridge is inserted into the device, the first relay is equipped with the second normally closed whip contacts and normally closed ". With these contacts, the second relay is equipped with the second and third normally open. There are contacts of the equilibrium lysator signal ““ connected to the output of the i amplifier, the output to the control contacts, the second contacts of both relays are connected in parallel and connected between the power source and the output of the indicator, the normally closed contacts of the first relay are connected in series with the parameter sensor, and the third contacts of the second relay - parallel to the sensor. Not the drawing shows a diagram of the device for automatic regularization. NIN technological parameters. 30 The device contains a balanced measuring bridge 1, in one of whose arms a sensor of a monitored parameter (not shown) is included. The output of the bridge, via usK1Mtep 2, is connected to the motor 3. The motor shaft 3 is connected to the control contacts 1 and 4, connected to the windings of the executive relays 6 and 7. To the output of the amplifier 2, the balance indicator 8 of the measuring bridge 1 is connected. An equilibrium detector 8 is connected to control terminals 4 and 5 and, through normally open contacts 9 and 10, relays 6 and 7 to a power source. Other normally open contacts 11 and 12 of these pe-ne are connected to an actuator control circuit (not shown), and the normally closed contact 14 of relay 6 and the third normally open contact 13 of relay 7 are connected respectively in series and in parallel to the sensor circuit napaNteTpa, The device works as follows. When the actual parameter value is removed from a predetermined, for example, upward contact 5, the relay 7 is activated, which turns on the actuator in the mode of reducing the parameter. At the same time, the contacts 13 close the sensor of the parameter, and the engine starts to rotate at the nominal speed, moving the balancing element of the bridge k to the zero point. When the balanced element enters the zone of permissible values of the parameter KOHTBICT 5 opens, the relay 7 opens its contacts and the actuator turns off, Equal to t the hanging element begins to mix up in the opposite direction to the position corresponding to the actual value of the parameter. If it is greater than the tolerance, then when the balancing element is stopped, the equilibrium detector 8 and relay 7 are triggered, which again activates the actuator and closes the sensor. The indicated cycles continue until 3 times until the value of the parameter is within the acceptable limits. This mode of operation of the regulating device eliminates a large control. The invention A device for automatic control of technological parameters, containing a balanced measuring bridge connected in series with a sensor of a monitored parameter, an amplifier and a motor whose shaft is connected to control contacts connected in series with the windings of two executive relays, the first normally open contacts included in the control circuit of the performer HbtM mechanism, and the power source, characterized in that, in order to improve the quality of the regulation of the inertial objects, the equilibrium detector of the measuring Bridge is inserted into it, the first relay is equipped with the second normally open contacts and normally closed contacts, the second relay is equipped with the second and third normally open contacts, while the equilibrium signal input is connected to the amplifier output, the code to the control contacts , the second contacts of both relays are connected in parallel and connected between the power source and the output of the detector, the normally closed contacts of the first relay are switched on subsequently with the parameter sensor, and the third contacts of the second relay are parallel to the Sensor, Sources of information taken into account during the examination 1, Strashun A. 3, and Black. I. V, Trends in the development of positional and positional-impedance controllers. - Instruments and control systems, 1969, M 7, p. 7-10.

2. Erofeev A, V. Electronic control devices in the regulation of heat processes. Gosenergoizdat, 1955, p.327328. rice (prototype).