SU1552109A1 - Dial voltage indicator - Google Patents

Abstract

This invention relates to electrical measuring technology. The purpose of the invention is to expand the field of application of the device. The device contains an amplitude-time converter 1, a pulse generator 2, a trigger 3, an inverter 4, a triggering LED 7, a power supply 14 and an indicator unit consisting of N cells 8 ₁ - 8 _N , each of which contains a communication LED 9, a photothyristor 10, LEDs 11 and 12 are red and green. Introduction of transistors 21-23, control buses 34-36, resistors 16-20, an optical converter 26, a differentiating circuit 24, a single vibrator 25 into each of the cells 8 ₁ -8 _N - LED 28, 29, a photo thyristor 30, a phototransistor 31 , the yellow LED 27, the resistor 32, and in the cell 8 ₁ - the photo thyristor 33 provides the setting of different colors of the glow scale of the device. 1 il.

Description

This invention relates to electrical

measuring equipment.

The purpose of the invention is to expand the use of the device by providing different colors of luminescence of its scale.

The drawing shows the functional scheme of the device.

The device contains an amplitude-belt converter (AVP) 1, a generator of 2 pulses, a trigger 3, an Inverter L, the first and second resistors $ and 6, which triggers 7, and in each of the cells 8.1, 8.2, ..., 8.К the indicator unit is a series-connected communication LED 9 and the first (yuttiristor 10, LEDs 11 and 12 of red and green emission. Cathodes of photothyristors 10 odd and even cells .8.1, 8.3, .... 8.N-1 and 8.2, 8. J, ..., 8.N are connected respectively to the direct and inverse outputs of trigger 3. The output of generator 2 is connected to counting input 13 of trigger 3, the anode of light Iodine 7, optically connected to the photothyristor 10 of the first cell 8.1, is connected via a resistor 5 to the power supply source I. The LED 9 of each cell, except the last one, is optically coupled to the phototristor 10 of the next cell. In addition, the device contains the third, fourth, fifth, sixth and seventh resistors 16-20, first, second and third transistors 21-23, a differentiating circuit, a one-shot 25 and an optical converter 26 and in each cell 8.1 - 8 "N LED 27 yellow, second and third LEDs 28 and 29 z, the second photo thyristor 30 phototransistor 31 and the eighth resistor 32, and the first cell 8.1 - the third photo thyristor 33. The output of the WUA T is connected via resistor 1 to the anodes of the 28 diodes of all the cells and to the input of the inverter C, the output of which through the resistor 17 is connected to anodes

LEDs 29 all cells. The anodes of the diode 9 of all cells are connected through a resistor 6 to the source AND, the cathode of the LED 9 of each cell is connected to the anode of the photo thyristor 1C and to the cathodes of LEDs 28 and 29. The anodes of the LEDs 11, 12 and 27 of each cell are connected to the cathode of the photothyristor 30, the anode of which connected to the collector of the photo transistor 31, the emitter of which is connected to the common bus. The anode of the photothyristor 30 of each cell is connected through a resistor 32 to the source I. The emitters of transistors 21, 22 and 23 are connected to a common bus. The control buses are connected via resistors 18, 19, and 20, respectively, to the bases of transistors 21, 22, and 23, whose collectors are connected to the cathodes of LEDs 11, 12, and 27, respectively. The LEDs 28 and 29 of each cell are optically connected to the phototransistor 38 and the phototransistor 31, respectively. The input circuit 2k is connected to source 1, the output is connected to the input of the one-shot 25, the output of which is connected to the cathode of LED 7 and to the input 37 of the installation in O11 of the trigger 3. The LED 9 of the last cell 8. and optically connected to the photothyristor 33 connected in parallel and according to phototir the source 10 cells 6.1 and with the input of the converter 26, the output of which is connected to the control input 38 A1Sh 1.

The voltage bar indicator works as follows.

At the initial moment of time, the supply voltage is supplied to the source bus AND, the input voltage tg is zero at the input, logic O are present on the control buses, transistors 21-23 are locked, and the diodes 11, 12 and 27 are red, green and yellow. The power is supplied through the circuit 2 to the input of the one-shot 25, at the output of which a short-term zero pulse is generated, exciting the triggering LED 7

which provides an optical signal to the photothyristor 10 cells 8.1, passing to the conducting state. A zero pulse from the output of the one-shot 25 is fed to the input 37 of the trigger 3 and

sets it to zero state i

To indicate the measurement result in a single color (for example, red), a single potential is applied to the control bus 3, which opens the transistor 21. AVP 1 does not turn on, because logical 0 is present at its control input 38, the output of the inverter k is logical 1. Two current flow circuits are created: from the source C of the power supply through the resistor 6, the LED 9 and the photo thyristor 10 of the cell 8.1 to the forward output of the trigger 3i from the output of the inverter through the resistor 17, the LED 29 and photothyristor 10 cells 8.1 - to the direct output of tr gage 3. LED 9 and LED 29 cells 8.1 emit light, respectively, to the photothyristor 10 cells 8.2, which are not included due to the presence of a logical 1 on its cathode, and to the phototransistor 31 cells 8.1, which creates another current flow circuit: from source 14 power through a resistor 32 cells 8.1, a phototransistor 31 cells 8.1 to a common bus. The lot-transistor 31 shunts the indication LEDs 11 12 and 27.

From the output of the generator 2 to the counting input 13 of the trigger 3 receives the clock pulses. With the arrival of the first pulse, the trigger 3 changes its state to the opposite. The photothyristor 10 cells 8.2 creates a voltage drop, and it is turned on by the LED on the 9 cells 8.1. The Lot Thyristor 10 cell 8.1 is closed due to the equalization of potentials on its electrodes. With the arrival of subsequent pulses, the described processes are repeated, and when the last cell 8.N triggered, the LED 9 of this cell lights up and shines on the input of the optical converter 26 and cell 8, 33 1, which is energized. Optical converter 26 supplies a logical 1 signal to control input 38 of HVA 1. WUA 1 is turned on, and a time interval is formed at its output in the form of a pulse width that is directly proportional to the amplitude of the voltage at input 15. At the output

25

0 0 35

about 5

0

0

five

Inverter h appears logical O, and on the anodes of the LEDs 28 - a high level of positive potential. Since the photo thyristor 33 cells 8.1 is turned on, the LED 28 of this cell emits light to the photo thyristor 30, which transits to the conducting state. The lot-transistor 31 cells 8.1 is locked due to the absence of an optical signal from LED 29. The following current flow circuit is created: power supply, resistor 32 cells 8.1, photo thyristor 30, red LED 11, transistor 21, common bus. Thus, the LED 11 of the cell 8.1 lights up on the indicator in red.

With the arrival of the next pulse on the photothyristor 10 cells 8.2, a voltage drop is created, and it is turned on by lighting the LED 9 of cell 8.1. The LED 28 of the cells 8.2 and, therefore, the photo-thyristor 30 operates. The LED 11 of the red light of the second cell lights up. 8.2. & otoristor 10 cells 8.1 goes to the reverse biased state due to equalization of potentials on its electrodes. Thus, after the N + 1-th pulse, the LEDs 11 of the red glow of the first two cells 8.1, 8.2 will light up. With the arrival of subsequent pulses, the processes described above are repeated.

I

At the end of the time interval

as many LEDs 11 will be excited as the number of pulses from the output of generator 2 has invested in the duration of this time interval. The subsequent cells will be triggered by the LEDs 29, and the red LEDs 11 of these cells are no longer hot, as they are shunted by the phototransistors 31. At the moment the 8.N cell is triggered, the control input 38 of the AVP 1 appears logic 1. At the output of CLP 1 a regular time interval appears, the duration of which may be longer or shorter than the previous one. If the duration is longer, the number of excited LEDs 11 is increased by an amount corresponding to the number of pulses invested in the duration, which corresponds to the difference of these durations. This is due to the fact that in this period of time

The operation of the cells 8 is on the light-diodes 28.

If the duration is shorter, the number of excited LEDs 11 is reduced by an amount corresponding to the number of pulses invested in the duration, which corresponds to the difference of these durations. Zeroing from this point on proceeds due to the operation of the cells (via LEDs 29, which transmit signals to the phototransistors 31 and the excited LEDs 11 and the photo thyristors 30 are shunted by 3U phototransistors

The color of the luminescence is set by the signals on the control buses, which excite the LEDs 11, 12 and 27 of the red, green and yellow luminescence. The brightness of each color is determined by the pulse duration on the control buses. The combination of durations makes it possible to obtain any color of the glow.

Claims (1)

Invention Formula Voltage indicator bar, containing an amplitude-time converter, the input of which is connected to the input of the device, and the output - to the input of the inverter, a pulse generator, the output of which is connected to the counting input of the trigger, the input of the installation O of the trigger is connected to the power supply through a series-connected triggering LED and a first resistor, an indicator unit consisting of N cells, each consisting of a first photothyristor, a first communication LED, a red LED, and a green candle LED In addition, the first LED of each cell, except the last one, is optically coupled to the first photo thyristor of the next cell, the trigger LED is optically coupled to the first photo thyristor of the first cell, the cathodes of the first photo thyristors of odd cells are combined, the cathodes of the first photo thyristors of even cells are combined, the torus of each cell is connected to the cathode of the corresponding first communication LED, and the second resistor, which is concerned with the fact that, in order to expand the field of application, three transistors, three control, optical five 0 five 0 five 0 45 50 55 a converter, a differentiating circuit, a one-shot and five resistors, and a yellow LED, a second and third connection LEDs, a second photo thyristor, a phototransistor, and an eighth transistor, and the third photo-thyristor, the first photothyristors, and odd and the even cells are connected respectively to the forward and inverse outputs of the trigger; the cathodes of the second and third communication LEDs of each cell are connected to the anode of the first photo thyristor; the anodes of the first communication LEDs are all The x cells are connected to the power source via the second resistor, the anodes of the second LEDs of all cells are connected to the output of the amplitude-time converter via the third resistor, the anodes of the third LEDs of all cells are connected to the output of the inverter through the fourth resistor, cathodes, red LEDs of all cells connected to the collector of the first transistor, the cathodes of the green LEDs of all cells are connected to the collector of the second transistor, the cathodes of the yellow LEDs of all cells are connected to the number The third transistor vector, the anodes of the red, green, and yellow LEDs of each cell are combined and connected to the cathode of the second photothyristor, the anode of which is connected to the power source through the corresponding eighth resistor, the collector of the phototransistor of each cell is connected to the anode of the second photothyristor, and the emitter is connected to the common bus, The second and third communication LEDs of each cell are optically coupled to the second photo thyristor and phototransistor, respectively, the anode and cathode of the third photo thyristor are connected to the anode and cathode At the first photo thyristor of the first cell, the first LED of the connection of the last cell is optically coupled to the third photo thyristor and through an optical converter to the control input of the amplitude-time converter, the input of the differentiating circuit is connected to the power source, and the output is to the input of the | About the trigger through the one-shot, the first, second and third control buses are connected to the bases of the first, second 91552105Y and third transistors, respectively, the emitters of the transistors are given in terms of the fifth, sixth, and seventh switches to each other.