SU1337787A1 - Scale voltage indicator - Google Patents

Abstract

The invention can be used in various test systems. The voltage indicator bar (tS} contains the amplitude-time converter 1, trigger 2, unit 3 timeslots, AND-NO 4.5 elements, element 6, pulse generator 7, display unit 8 consisting of N cells

Description

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The invention relates to electrical measurements and can be used in various measurement and control systems.

The purpose of the invention is to increase reliability by reducing the number of elements of the indicator unit.

The drawing shows a functional diagram of a voltage bar gauge.

The device contains an amplitude-time converter (WUA) 1, trigger 2, setpoint adjuster 3 time intervals (CWI) elements AND-NOT 4 and 5, element I b, pulse generator 7, display unit 8 consisting of N cells (9-1 ) - (9-N), IC of scippers and self each sequence and according to included) le photothyristor 10 and light 11 and 12. In addition to tsp, ycTpoficT- contains resistor 13 and 1D, triggering diode 15, power supply 16

and input 11 PDGU 1 7.

Output / 1 of the generator 7 impulse 1, owl is connected to the first input of the element P 6 and through ZVI 3 to the third inputs: aphic j ieHToH I-IE i and 5, S-input of the trigger 2, the control input of the HDL 1 and the cathode of the LED 15, the anode which through a resistor 14 is connected to the output of the 1ft power supply unit. The input of the amplitude-time converter 1 is connected to the input of the niHHii 17, and the output is connected to the second input of the AND fS element, the output of the latter is connected to the counting input of the trigger 2, and directly and inverse to the output of the trigger 2) 1, respectively, to the inputs eletogen, Both 4 and 5, the outputs of the last one are connected respectively to the cathodes of the phototirigors 10 odd and even cells (9-1) - (9-N of the display unit 8, all the LEDs 12 through the resistor 13 connect the progress of the block 16.

The triggering LED 15 and the photothyristor 10 of the first cell 9-1, as well as the LED 11 of the previous cells 9 and the photogistors of the subsequent cells 9 form o1ron 1ary.

The device works in a manner.

In the initial state when the power supply unit 16 is turned on, the display unit 8 is nullified, since the triggering LED 15 does not emit light, its level 1 is present at the cathode from the output of the ignition voltage 3, the pulse generator 7 functions, but its

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arrive at the counting input of trigger 2, since element 6 is closed by a low logic level from the output of WUA 1. State of trigger 2 is arbitrary.

When a voltage is applied to the input bus 17 of the indicator, WUA 1 converts the amplitude of the voltage into a time interval, represented as the duration of the presence of l at its output only after the arrival of the first negative pulse (O) from the output of the OVI 3, which , I act on the first inputs 1.1 of the elements AND –NE 4 and 5, zeroes the display unit 8. I influence the setup input of the trigger 2, sets the level O 1 at the direct output, and the O level on the inverse, I affect the cathode With 1 diode 15, it excites it with this optical signal along The photocell 10 of the first cell 9-1 is turned on, and when the control input of WUA 1 is applied, the WUA 1 begins to function at a cut off of this pulse, from the output of which a high logical level goes to the first input element 1gun the pulses of the generator 7 to the input of the trigger 2.

The cut of the 3 SIGI pulse also leads to the generation of LED 15, the excitation of the phototype 1Store 10 and electrically connected with LEDs 11 and 12, as 5 as the photo thyristor 10 prepared with the optical signal of LED 15 and jia its cathode entered level O from AND-AND 4 element .

Thus, the negative impulse ZVI 3 sets the outputs of the AND-HE elements 4 and 5 to levels 1, which ensures zeroing of all bits of the display unit 8, the LED 15 flashes, sets trigger 2 to the single state at the forward output, excites the first cell 9-1 of display unit 8 and starts APiU 1,

The first pulse of the generator 7 through the open element AND 6 switches the trigger 1 EP 2 to the zero state, which leads to the inclusion of the photo thyristor 10 (and the electrically connected LEDs 11 and 12) of the second cell 9-2, since it was prepared by optical LED signal 11 of the first cell 9-1 and at its cathode received a low logic level.

The photothyristor 10 of the first cell 9-1 is turned off due to the alignment of the potenti

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cells on its electrodes. Consequently, the first pulse of the generator 7 leads to the excitation of the LED 12-2 of the second cell 9-2 and damping in the first cell 9-1. With the arrival of the second impulse, the third cell 9-3 is excited at the input of the trigger 2, and the second cell 9-2 is quenched, with the third pulse the fourth cell 9-4 is excited and the third cell 9-3 is quenched.

If, prior to the arrival of the fourth pulse, the counting input of trigger 2 from generator 7 appears OU 1 at output, then the fourth cell 9–4 is in the excited state, since element 6 prohibits further passage of pulses from generator 7 and trigger 2 This is the previous connection.

Thus, at the end of the time interval at the output of the WUA 1, the indication of the information received is stored,

The occurrence of a negative pulse at the output of the ZVI 3 zeroes all the cells (9-1) - (9-N) of the display unit 8, puts the first cell 9-1 in an excited state, starts the AVPA 1, and then with the arrival of pulses to the counting input of trigger 2, the described processes are repeated.

The start-up frequency of WUA 1 is set with the help of SZN 3, which can be used as a frequency divider with a variable division ratio, which generates a sequence of negative impulses from generator 7 pulses, the duration of which is equal to the activation time of one of the AND-HE elements 4 and 5, trigger 2 and LED 15 and should be sufficient to prepare the photothyristor 10 and turn on the LEDs 11 and 12, and the duration of the pause - the maximum time interval displayed

This scale plus the time for displaying the stored information (if necessary).

BNIIGM Order 4125/42 Circulation 730 Subscription Proizv-polygr. pr-tie, Uzhgorod, st. Project, 4

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Thus, on the emitting scale of the display unit 8, the rising luminous band, the length of which is proportional to the value of the input signal, and at the end of the measured signal, its maximum value is fixed in the unit-position nHoHHONj code.

Claims (1)

Invention Formula A voltage indicator bar comprising an amplitude-time converter, a trigger, a pulse generator, two NAND devices, two resistors, a power supply unit that triggers the LED and N, each connected in series and co-connected with the first and second LEDs and a photothyristor, with This triggers the LED and the photothyristor of the first cell, as well as all the second LEDs of the conversion cells and the photothyristors of the subsequent cells are optically connected, the anodes of the first LEDs of all the cells are connected through the first resistor to the output of the power supply unit and the first output of the second resistor, the second output of which is connected via the triggering LED to the trigger input and the first inputs of the first and second AND-NOT elements, the second inputs of which are connected respectively to the direct and inverse outputs of the trigger -NOT connected to the photothyristor cathodes of non-even and even-numbered cells, respectively, and the input of the amplitude-time converter is connected to the input bus, characterized in that, in order to increase reliability, here are the setpoint of time intervals and the element I, the output of which is connected to the counting trigger input, the first input of the element I is connected to the output of the pulse generator and through the time interval setting unit to the first inputs of the NAND element and the control input of the amplitude-time converter connected to the second input of element I.