SU577517A1 - Device for controlling technological parameters - Google Patents

Description

The invention relates to the field of process control, in particular for controlling the parameters of temperature and humidity during the drying of capillary-porous building materials and parts.

Known are the process parameter controllers (temperature and humidity) used in systems for automatic control of capillary-drying building materials and parts drying processes.

The closest to the invention in its technical nature is a device for adjusting technological parameters, comprising a parameter sensor connected to series-connected direct current amplifier and threshold element, and an actuating element 2.

In this case, the sensing element (sensor) is permanently connected to the control circuit. Since many technological processes, in particular, the processes of hydrothermal treatment of capillary porous building materials, take several days, the control channel is subject to great demands for accuracy and accuracy.

2

The control signal is the channel that is not sufficiently protected.

The aim of the invention is the rioBt interference immunity of devices for regulating process para- meters.

This is achieved in that the arrangement for adjusting the process parameters comprises a clock pulse generator, a delay element and a first memory element connected in series, a coincidence element and a second memory element, one input of the first memory element connected to the output of the threshold element, the second input of the first element the memory is connected to the output of the clock generator, which is connected to one of the inputs of the second memory element and through the delay element is connected to the input of the coincidence element, output v The memory element is connected to the actuator.

FIG. 1 shows a functional diagram of the device; in fig. 2 timing diagrams of the scheme.

Claims (2)

The device contains a parameter sensor 1, amplifier 2 (parameter signal), a threshold element 3, a memory element 4, a matching element 5, a memory element 6, an executive element 7, a clock pulse generator 8 and a delay element 9. The device operates as follows. The output signal of the generator 8 clock pulses sets in O the memory elements 4 and 6, made respectively in the form of a conversion trigger with the counting input of another trigger, and every second pulse from the output of the sensor 1 parameter through the amplifier 2, a threshold element such as Schmidt trigger, and the element The memory 4, in the presence of a resolving potential on the coincidence element 5 from the output of the delay element, for example, a waiting multivibrator, sets the trigger of the memory element 6, the output of which is connected to the actuating element 7. ° mementy time clock pulse generator output signal simultaneously with the SET Coy in state of the memory elements 4, 6 is triggered delayed ki element 9. In the presence of a signal from the sensor, pulse signals (the frequency of which is equal to the frequency of the power supply of the regulating bridge, in which the parameter sensor is installed) appear at the output of the threshold element. In moments of time, neither i | and ty the memory element 4 is triggered. At time L, the matching circuit 5 is set to 1 memory element 6. Since the trigger of memory element 6 before time t was in the state, which corresponds to the activated state of the actuator 7 then the response time of the latter must be greater than the difference -io. The frequency of the generator 8 clock pulses is selected depending on the required control accuracy and inertia of the control object. If, at time t, in the absence of a signal from the sensor, an interference pulse has been received, then the trigger of memory element 6 is not set. to the state as to set to the state two pulses are necessary. Thus, such an implementation allows to increase the noise immunity of the device, and hence the reliability of the control system. An apparatus for controlling technological parameters, comprising a parameter sensor connected to a series-connected amplifier and a threshold element, and an actuator element, characterized in that, in order to increase the noise immunity of the device, it comprises a clock generator, a delay element, and serially connected first memory element a match element and a second memory element, with one input of the first memory element connected to the output of the threshold element, the second input of the first A memory element is connected to an output of a clock generator, which is connected to one of the inputs of the second memory element and is connected to an input of a matching element through a delay element, the output of the second memory element is connected to an actuator. Sources of information taken into account in the examination; 1.Voronov V.T. and others. Automation tepp processes in the production of building materials, Kiev, 1975, pp.122-143. 2. USSR Author's Certificate No. 474797, M.C.Q 05 05/23/19, 1973. .S, sV7 . " u2