SU1213469A1 - Multichannel checking device - Google Patents

Description

one

The invention relates to a control and measurement system and can be used to control the parameters of radio-electronic objects.

The purpose of the invention is to simplify the device by replacing the parallel control of the parameters of the sensors on the surrounding equipment, with the concomitant reduction of equipment.

FIG. 1 shows a block diagram of the device; in fig. 2 - time diagrams of signals.

The device contains sensors 1.1-1.p parameters, transformers 2.1-2.P, switch 3, second counter 4, first key 5, output 6 of the first key 5, multi-vibrator 7, decoupling diode 8, capacitor 9, second key 10, the display element 11, the decoder 12, the resistor 13, the pulse generator I4, the first counter 15, the first comparator 16, the second comparator 17 i the source 18 of the reference voltage, the gate generator 19, the reference voltage.

The outputs of the sensors 1.1-l.n parameters are connected to the primary windings of the corresponding transformers 2.1-2.p, the first conclusions of the secondary windings of which are connected to the corresponding first inputs of the switch Z,.

The output of the pulse generator N is connected to the counting input of the first counter 15 and directly to the gate generator 19, and through a resistor 13 to the counting input of the second counter 4, to the trigger input of the waiting multivibrator 7, to the anode of the diode 8 and the output 6 of the key 5 connected a control input with an output of a standby multivibrator 7 connected by a power output to the cathode of diode 8, a first lead of a capacitor 9, to the power leads of a second counter 4 and a switch 3 connected by an output to the signal input of the first key 5 , the second inputs from the output t-ffl of the second counter 4, the third input from the output source 20 of the reference voltage, the second terminals of the secondary windings of transformers 2.1-2.P are connected to the common bus of the device and to the second output of the capacitor 9, the anode of the diode 8 connected to the output 6 of the first key 5 and C first

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the inputs of the first 16 and second 17 comparators connected by the control inputs to the output of the generator 19 of the pulse gate, the second 5 inputs to the corresponding outputs of the source 18 of the reference voltage; the output of the second comparator 17 is connected to the control input of the second key 10 connected to the signal input 10 bus device power output - with the power output of the display element 11 connected by inputs to the outputs of the decoder 12, the inputs of which are connected to the outputs

15 of the first counter 15 connected by a setup input with an output of the first comparator 16,

The device works as follows.

20 When the power is turned on, the pulse generator 14 generates pulses of a clock frequency of constant amplitude, located in the positive region (Fig. 2), which arrive

25 to the counting input of the counter 15 and the input of the sampler 19 of strobing pulses. These pulses also flow through resistor 13 and diode 18 to capacitor 9. Constant voltage, from capacitor 9, goes to the output pins of switch 3, counter 4, and waiting for multivibrator -7. Negative clock drops trigger counter 4 and idle

5 multivibrator 7, which generates pulses, the duration of each of which exceeds the duration of the clock pulses by the value (FIG. 2). These pulses come on

0 control key input 5. At times, corresponding to the simultaneous connection of one of the inputs of switch 3 under the control of counter 4. to its output and switch on key 5, the voltage at output 16 of key 5 corresponds to the value of the controlled parameter coming from li sensor connected to transformer primary winding 2.i

0 {time points & t, ..., tj, Atfi4.i, FIG. 2). At the moment when the switch 3 connects its n + input to the output, the voltage value at output 6 is equal to the source voltage 20 and

55 corresponds to the non-occupied channel (Fig. 2, time bt.). During the operation of this pulse, a comparator 16 is triggered, the trigger level of which (Fig. 2, U) corresponds to the level of the unoccupied channel. The pulse from the output of the comparator 16 resets the counter 15 to zero. This ensures that the states of the counter correspond to the numbers of the sensors 1.1–1.1 that are being polled at a given time. The parameter values are checked by comparing with the permissible values of the comparator 17, whose response level corresponds to the permissible values of the monitored parameters (Fig. 2, Ur). Gating pulses are formed by shaper 19 (Fig. 2), their duration fj is less than dt. These pulses are fed to the gating inputs of comparators 16 and 17 and provide the necessary noise immunity of the device. Indication of the numbers of faulty parameters on the display element 11 is provided by the key 10, which connects the power to the display element 11 by the signal of the comparator I7. When the states of the counter 15 and the decoder 12 are successively changed, the sensor numbers are displayed on the indication element P

lil-l.n, whose parameters are out of tolerance.

Thus, the introduction of elements 4, 5, 7-13, 15-19, switch 3 allows the control of sensor parameters, without using a special power source of switch 3, without using special connections and elements to control sensor polling to control parameters and without using the number n of equipment sensors and parallel control channels, each of which contains a key, an indication element and a sensor 1.i line with measuring elements, including a wire and soldering, which for large values of juice It raises the number of elements, connections and rations in the device and significantly increases its reliability.

Claims (1)

Invention Formula Multichannel control device containing parameter sensors. connected to the primary windings of the respective transformers, the first conclusions of the secondary windings of which are connected to the corresponding first inputs of the switch, a pulse generator, characterized in that, in order to increase reliability, the display element, the first and second counters, the resistor waiting and the multivibrator , capacitor, diode, gating pulse shaper, first and second comparators, reference voltage source, decoder, the first and second keys, moreover, the output of the pulse generator is connected to the counting input of the first counter and to the input of the gate pulse generator directly, and through a resistor - with the counting input of the second counter, with the trigger input of the waiting multivibrator, the anode of the diode and the output of the key connected by the control input with the output of the waiting a multivibrator connected by a power lead to a cathode of a diode, to a first lead of a capacitor, to the power leads of a second counter and a switch connected by an output to the signal input of the first switch, the second inputs - with the outputs of the second counter, the third input - with the output of the reference voltage source, the second terminals of the secondary windings of the transformers are connected to the common bus device and with the second output CON-. the sensor, the diode anode is connected to the output of the first key and to the first inputs of the first and second comparators,  connected by control inputs with the gate driver output, the second inputs with the corresponding outputs of the voltage source, the output of the second comparator is connected to the control input of the second key connected by the signal input to the device power bus, output to the power supply of the display element connected by the inputs with the outputs of the decoder, the inputs of which are connected to the outputs of the first counter connected by a setup input to the output of the first comparator. Compiled by V. Dvorkin Editor N, Dankulich Tehred Z.Kastelevich Proofreader A. Obruchar Order 780/57 Circulation 837 Subscription VNISh State Committee of the USSR for inventions and discoveries PZOZZe Moscow, Zh-35, Raushsk nab. 4/5 Branch ShSh Patent Uzhgorod, st. Project, 4