SU134588A1 - A preemptive multipoint alarm device for upper or lower limit values of parameters - Google Patents

Description

Multipoint signaling devices of the upper or lower limit values of parameters are known, which contain individual contactless input keys, a dispenser, a common, group or individual nonlinear deviation detection limiters, a common difference emulsion amplifier, individual output C, matching circuits and individual indicator lights made on cold cathode. The values of the controlled velpchins are converted by the sensors into a DC voltage supplied to the inputs of the individual contactless switches by the number of sensors. Each of the keys at the time of the arrival of HMnyvibca from the distributor produces an output pulse, proportional to the voltage at its input (on the corresponding sensor). Depending on the need to signal only the lower or upper limit value, the lower and upper values, or several limit values, the key outputs may be individual or grouped. In the general case, the common output of the input keys is connected to one input of the common nonlinear deviation detection limiter, to the second input of which a setpoint voltage is applied that determines the signaling limit value. At the output of the limiter, there is a series of immersions, each of which has an amilitude equal to the absolute value of the difference 1 between the signal voltage and the setpoint voltage, if the absolute value is positive, and zero, if the absolute value is negative. The resulting impulse of the difference through the abundance of the amplifier enters the individual (by number) output coincidence circuits, the output impulse of which occurs at the moment of coincidence of the difference between the impulse and the distributor impulse. The output impulse of the coincidence circuit is used to light up the corresponding, its indicator light, each of which is made on a cold cathode thyratron.

The proposed clipping device — multipoint signaling of the upper or lower limit value of the parameters differs from the known ones used for simultaneous signaling of the upper and lower limit values of two thyratrons with a common self-treating chain connected in parallel with these thyratrons and formed by the series connection of a capacitor and resistance, which simplifies the design of the device and increases alarm speed., -.

Alarm action; composed of two thyratrons with. The xNEX cathode with a common self-dressing chain is explained in the circuit diagram shown in the drawing.

Before a short firing pulse arrives, a deviation to the starting anode / thyratron 2 or 3, one of which serves to signal the lower limit of the parameter deviation, and the other to the upper, the potential at the cathode of the thyratron and at point 4 is equal to the ground potential, and the capacitor 5 is charged to full voltage source 6 anode power. After the thyratron is ignited, the voltage at its cathode is increased by AND-1 and the capacitor 5 is discharged. When the voltage between the cathode and the thyratron voltage drops below a certain value, the thyratron goes out. The burning time of a thyratron is determined by the constant time of the self-extinguishing chain made up of capacitor 5 and resistance 7. When she grains the parameter deviation at the corresponding point on the starting ayod of the thyratron in the next cycle, the ignition pulse re-enters and the thyratron is again ignited. If the parameter returns to a value below the setpoint, then in the following ignition cycle, the ignition impulse will not arrive and the thyratron will remain extinguished. Diode 8 is needed when the ignition period is short and serves to quickly restore the charge;: On the capacitor after the thyratron has gone out.

..,.: ... Subject of invention

.:; i. A roundabout multipoint alarm device, the upper or Hifr ijerq limiting value of parameters, consisting more of individual H1X contactless input keys, distributor, common, group OR; and non-personal non-linear limiters for detecting an output of a price, a common difference pulse amplifier, individual output coincidence circuits and divides, light indicators, performed on cold cathode tiratrons, characterized in that, in order to simplify the device and increase its speed, to simultaneously signal the upper and the lower limiting values of the steam (meters used two thyratrons with a common self-dressing chain, forming a series connection of a capacitor and an active resistance, CONNECTIONS parallel to these thyratrons.