SU368586A1 - NONCONTACT AUTOREGULATOR FOR MELIORATIVE SYSTEMS - Google Patents

Description

one

The proposed device relates to a home-building technique and can be used, for example, to automatically control the water level using multi-position electrically controlled valves in multi-link land-reclamation systems with a considerable length, their long object times and latency.

Autoregulators are known that contain a measuring unit connected in series, an adder, a modulator, triggers an output stage, the first output of which is connected through an serially connected feedback transformer and an isodrome node to the adder's input.

The proposed device is characterized in that three diodes, a resistor and a series-connected electronic relay, a Schmitt trigger and a transistor switch, the output of which is connected to the modulator output, are introduced into it. The first input of the relay is connected via a serial line from the first diode, resistor and second diode to the first output of the output stage, the second output of which is connected to the common point of the resistor, the first diode and the second input of the relay, and its third input is connected to the third output of the diode cascade.

This expands the field of application of the device.

The drawing shows the block diagram of the autoregulator.

The contactless automatic regulator contains an adjusting unit, unit 1, consisting of measuring unit 2 and electronic unit 3.

The electronic unit 3 forms the isodromic regulation law and consists of summing cascade 4, one input of which is combined with the output of unit 2, output through the modulator 5, trigger 6, output stage 7, feedback transformer 8 and node of the isodrome 9 is connected to the second input of the cascade 4. To output 10 of the output stage 7 and the switch) actuator actuator actuator (not shown).

To the output 10 of the output stage 7, there is also connected a unit // for automatic stabilization of the control process, consisting of an electronic time relay 12, parallel to the R C-chain 13 through the separating diodes 14 connected to the reversing outputs of the autoregulator, and through the detector 15 and the diode 16 - with the terminal of the general output of the podromic auto regulator. The Schmitt trigger (or amilitude discriminator) 17 connects the output of an electronic time relay to the input of a transistor switch 18, the output of which is connected to the input of trigger 6.

The regulator works as follows.

In the initial state. In the absence of a mismatch at the input of the regulating unit at the output of the output stage, the voltage is absent, and through the diodes 14 at the input of time relay 12, the voltage is not applied.

In time relay 2, the parallel j9C-ueno4KH capacitor is discharged, and its lamp is locked but controlled by the voltage developed on the cathode resistor, and from the anode of the lamp the time-proof triggering voltage is applied to the Schmitt trigger 17. A key 18 connected to the output of a Schmitt trigger 17 is also fired and, therefore, the regulator trigger trigger input circuit connected to the output of the key 18 is not shunted.

When a mismatch appears at the input of the regulator, a voltage appears at one of its output (control pulse, the duration of which is proportional to the magnitude of the error). This voltage through one of the diodes 14 (depending on the direction of the error), the potentiometer 15 and the diode 16 during the control impulse period quickly charges the capacitor parallel to the C-chain of the time relay 12. Moreover, the top (according to the diagram) capacitor plate (connected to the control grid of the lamp time relay 12) is charged with a positive potential. So that the voltage of the time relay lamp does not open at the same time during the control pulse period, the time relay 12 is also applied to the cathode of the lamp and therefore the lamp remains locked during the control pulse due to the voltage on the cathode resistor.

In this period, Trgge. Schmitt's 17 gg and key 18 are locked, the trigger input is not shunted, and the external feedback from the output of the regulating unit to its trigger input is not active, and the regulator issues a control pulse that is proportional to the error value. In this case, the diode 16 serves to decouple the top (according to the scheme) capacitor plate from the shunt input circuits of the device, when there is no control pulse and there is an adjustment pause.

Potentiometer 15 serves to transfer the bias voltage from the cathode to the control grid of the lamp; galvanically connects the lower capacitor plate of the C-chain of time 2 relay to the cathode circuit and serves to simultaneously supply the same amount of positive potential from the output of the regulating unit during the pulse period to the cathode and the grid of the lamp.

The output voltage of the regulating unit has a pulsating form and is fed to a capacitor. From the time relay circuit 12, it charges the capacitor to an amplitude value. This causes an increase in the positive potential of the control grid.

lamp relative to its cathode (due to the presence of diode 16). Therefore, a slightly reduced voltage is supplied to the upper (according to the diagram) capacitor plate from the potentiometer / 5, which achieves the same potential value from the output of the regulating unit and the period of the NMR applied to the cathode and the grid la.mpa. At the end of the first control pulse of the regulating unit, proportional to the magnitude of the error, the output voltage disappears, the time relay lamp 12 opens due to the voltage of the charged capacitance, and the voltage on its anode is abrupt

the Schmitt trigger 17 opens and opens the key 18, and the key shunts the trigger input circuit, which significantly reduces the amplitude of the modulator pulses and the following control pulses after the first control pulse until the capacitor of the time relay 12 is not discharged through the high resistance of the discharge resistor (which specifies the required control pause duration for the discrete proportional-national-impulse control law).

The capacitor of the time relay 2 is discharged by an exponential characteristic, and the trigger 17 with the key 18 provides the necessary relativity. At the end of the pause, the trigger and the key are locked and, if a mismatch voltage is still present at the controller input, the described adjustment cycle is repeated.

Thus, a regulator that has a proportional-integral (isodromic) law of regulation is transferred to the discrete proportional-national-impulse law mode required for irrigation facilities.

irrigation systems.

Subject invented and

Contactless auto regulator for reclamation systems containing sequentially

connected measuring unit, adder, modulator, trigger, output stage, the first output of which is connected via series-connected feedback transformer and isodrome node to the input of the adder,

characterized in that, in order to expand the field of application, a stabilization unit is inserted in it containing three diodes, a resistor and a series-connected electronic relay, Schmitt trigger and transistor switch,

the output of which is connected to the output of the modulator; The first input of the electronic relay is connected through a series circuit from the first diode, resistor and second diode to the first output of the output stage, the second VHOX. It is connected to the common connection point of the resistor, the first diode and the second input of the electronic relay, and its third input is connected through the third diode to the third output of the output cascade.

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