SU877477A1 - Parameter control device - Google Patents

Description

one

The invention relates to automation and can be used in systems of automatic control and monitoring, in particular, in ship control systems, laziness ff control.

The closest to the proposed technical entity is a device containing a sensor, a source of reference voltage, two switches, a converter, a comparison circuit, sources of operating and control reference voltages, indicators of the parameter maximum deviation and control lock, logic unit, actuator and Elements And, Prohibition And Delay 1}

The disadvantages of this device are the necessity of blocking the executive body during control and the lack of the possibility of operative control of the current value of the parameter while the installation is in operation and, as a result, low speed performance.

The purpose of the iso-process is to increase the speed of the device.

The goal is achieved by the fact that the Parameter control device contains a differential transformer sensor connected to the first input of the adder, the second input of which is connected to the output of the variable voltage source, and the output to the first input of the comparison unit, the second input of which is connected With the output of the onqpHoro block, the voltages, power amplifiers, the actuator and the signal element are introduced

10 phase-sensitive unit, the KOTqporo input is connected to the output of the comparison unit, and the outputs through power amplifiers are connected respectively to the actuator and the signal element.

15

The fygd shows schematic diagrams of the device; figure 2 - characteristic differential-transformer sensor; FIG. 3 are timing diagrams showing 20 devices that are not operational.

Claims (1)

The device contains differential transformer sensor 1, which is connected to the input 2 of the adder 3, the other. the input 4 of which is connected to the output of the IJCT nickname 5 of the controllable voltage, and the output of the adder 3 is connected to the first input 6 of the comparison unit 7, the second input 8 of which is connected to the voltage support unit 9. phase-sensitive unit 11, the outputs 1 and 13 of which are connected through power amplifiers 14 and 15 respectively to the executive body 16 and the signal element 17. The characteristic of the differential transformer sensor (Fig. 2) is the dependence of the variable output The voltage of the sensor Ug from displacement b has two branches, and the output voltage corresponding to branch a of the characteristic is shifted to the phase relative to the output voltage of branch b on 18OF. In FIG. 3 time diagrams are presented explaining the operation of the device at the value of the parameter corresponding to point b of Fig. 2 (the points of the diagram of Fig. 1 and the corresponding graphs of Fig. 3 are denoted by the same letters). The device operates as follows: The output signal (Jc, adder 3, representing the sum of the alternating voltage c / d sensor 1 and half-wave voltage U ,, source 5, is fed to the input 6 of the comparison unit 7, where it is compared with the reference voltage ( j supplied from reference voltage block 9. To the second input 8 of comparison block 7. If the output voltage U, adder B in amplitude: exceeds the level of reference voltage 0 (jn. compare block 7 operates and generates pulses that are applied to the control Electrode Tiris torus Y. Blag The fact that sensor 1, adjustable voltage source 5 is sensitive to power. The unit 11 is powered by a single alternating source (not shown), the anode voltage of the thyristor 1O coincides in phase with the output voltage Ud of sensor 1 corresponding to branch A of the characteristic, and voltage Ug - with an output voltage Od of sensor I, corresponding to branch 6 of the characteristic, and with a single-field peri- ode voltage of source 5. Depending on the ratio between the amplitude-beats of the output signals Ua of sensor 1 and source 5, as well as the phase of the output signal tchika phase output pulses Octbloka. The 7-comparisons can coincide with both the Od phase and Ug OR simultaneously with both phases. Moreover, when the pulses are UH generated by circuit 7. Comparisons coincide with the phase Ua. The signal at the output 12 of the phase-sensitive unit 11, which through the amplifier 14 turns on the actuator 16. This mode is operational and corresponds to the branch A of the characteristic (Fig. 2). the coincidence of the phase of the generated pulses of the phase and 5, the signal appears only at the output 13 of the phase-sensitive. Block 11, which triggers the signal element 17. This mode is used in the proposed device to control the current value of the parameter and determine the health of the device elements and communication lines without blocking the actuator. The device is controlled by the operator using an adjustable voltage source 5. By smoothly changing the value of the output voltage of the source 5, the signal element 17 is triggered. The operation of the signal element 17 corresponds to the amplitude of the output voltage Ue. adder 3 equal. onojpHoro voltage (Jof of Comparison Unit 7) The value of the reference voltage V0 (| (set for each sensor as the set value) and the value of the output voltage of the source 5, determine the value of the current value of the output voltage M / y of sensor 1, ... Thus, the operator has the ability, controlling the magnitude of the signal from source 5, to change the relationship between the sensor signal 1 and the reference voltage of the comparison unit 7 and, therefore, can trigger the signal element 17 without causing the actuator to operate 16. Observations of the change in the state of the signal element 17 and the corresponding signal of the source 5 source according to its feces, calibrated in the corresponding units, the operator receives information about the actual values of the controlled parameter. The proposed device also reveals the malfunction characteristics. sensor malfunction 1 is an open circuit or short circuit), or the connection of sensor I with adder 3, i.e. The type of fault on the scale of source 5 will correspond to any type of malfunction associated with the output of sensor 1 of the zero. The positive effect is that the proposed device provides the possibility to control both the current value of the parameter and malfunctions without shutting down the actuator, resulting in increased reliability and efficiency of control. The formula of the image Device for controlling parameters, containing a differential transformer sensor connected to the first input of the adder, the second input of which; It is connected to the output of the source with an adjustable voltage, and the output with the first input of the comparison unit, the second input of which is (rig. g is unified with the output of the reference voltage block, power amplifiers, the actuator and the signal element, this is due to the fact that in order to increase speed, a phase-sensitive block is inserted into it, the input of which is connected to the output of the comparator block, and the outputs through power amplifiers are connected respectively to the executive body and the signal element. Sources of information taken into account in the examination of the l.ABTOpcKoe certificate of the USSR M 643844, class G-O5 23 / O2, 1976, t prototype). (par.2 Srig.Z