SU1622827A1 - Instrument transducer - Google Patents

Abstract

The invention can be used in the construction of primary transducer transducers of constant, alternating and pulsed current, used and systems. Max. built-in automated monitoring and diagnostics of radio electronic, for example, television (equipment). The purpose of the invention is the extension of the field of application — achieved by converting two input signals. The device contains rectifier cone 19 and 20 made on operational amplifiers 2.6 and 30, a multipolar pulse generator 21 containing a self-generator 38 symmetric rectangular pulses, resistors, capacitors and diodes. The operation of the measuring transducer is due to temporary signals grams, of the invention disclosed herein. 2 yl. with (L w oc e to 23 s

Description

The invention relates to the communications industry, and can be used in the construction of primary transducer transducers of direct, alternating current and pulsed current used in the systems of built-in automated monitoring and diagnostics of radio electronic equipment, in particular, television equipment.

The aim of the invention is to expand the scope by providing conversion of two input signals.

Figure 1 shows the structural diagram of the measuring transducer; figure 2 - diagrams of signals at characteristic points.

The transmitter will hold input terminals 1, 2 and 3 for connecting two sources 4 and 5 of the DC or AC convertible voltage (terminal 2 is common). The anode of the diode 6 of the first diode-capacitor storage cell 7 is connected to terminal 1. The cathode of diode 6 is connected to the cathode of the separation diode 8 and the first, the output of the capacitor 9, in parallel with which the first discharge resistor 10 is connected. To terminal 3, the cathode of the second diode 11 is connected diode capacitor cell 12. Anode of diode 11 Connected to the anode of the second separation diode 13 and the first terminal of the capacitor 14. Parallel to the capacitor 14 is connected the second discharge resistor I5. The second terminals of capacitors 9 and 14 are interconnected with the input terminal 2 and one terminal of the second 16 windings of the pulse transformer 17, the other terminal of which is connected to the anode of the diode 8 and the cathode of the diode 13. The first terminal of the first 18 windings of the transformer 17 is connected to the inputs of rectifying converters 19 and 20, respectively, and with the output of the generator 21 of different-pair pulses, through the limiting resistor 27. The second terminal of the first winding 18 of the transformer 17 is connected to the common wire 23. The output of the rectifying converter 19 is the amplitude of the pulse s positive polarity is connected to the output terminal 24 and the output transducer 20 rectifying unit amplitude pulses of negative polarity - to the output terminal 25.

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As diodes 6 and 8, 11 and 13, any diodes can be used, preferably with identical characteristics. As a pulse transformer 17 can be used any small pulse transformer, for example, type TIM.

The rectifier converter 19 pulses of positive polarity contains an operational amplifier 26, the non-inverting input of which is connected to the input of the rectifying converter, the picker 19, and the inverting input - with its output, the output of the operational amplifier 26 is connected to the anode of the diode 27, the cathode of which is connected to the outlets rectifier converter 19 and parallel KS circuit 28,29. The rectifying converter 20 pulses of negative polarity contains an operational amplifier 30, a diode 31, a capacitor 32 and a resistor 33. At the same time, the diode 3 has an inclusion opposite to that of diode 27. The generator 21 of different polarity pulses shifted in time between themselves is made on the basis of two transistor switches on transit bangs 34 and 35 of various kinds of conductivity. RC control circuits 36 and 37 of control pulse generation, the inputs of which are connected to the output of the oscillator 38 of symmetrical rectangular pulses, are connected to the control inputs of the keys.

The measuring transducer operates as follows.

When the power is turned on, the autogenerator 38 generates at its output symmetric rectangular pulses (Fig. 2a), the front and the slope of which, through the forming RC circuits 36 and 37, act on the inputs of transistor switches 34 and 35 to provide alternating pulses at the output of the generator 21 this amplitude (Fig.26), coming through a resistor 22 to the first 18 windings of the pulse transformer 17.

In the absence of input signals at the input terminals 1 and 3, the amplitude of the pulses at the inputs of the rectifier converters 19 and 20 is equal to the voltage drop across the dynamic resistances of the diodes 8 and 13, respectively, stBno. During the action of pulses (positive and negative polarity passing through transformer 17 and diodes 3 and 13, respectively, on capacitors 9 and 14, capacitors 9 and 14 are practically not charged, since the constant charging times of capacitors are much longer than the duration of the pulses. Resistors 10 and 15 provide the full discharge of capacitors 9 and 14 over the time interval between pulses.

When DC voltages are supplied to input terminals 1 and 3 from sources 4 and 5, respectively, capacitors 9 and 14 are charged through diodes 6 and II to voltages. The magnitude of which differs from the values of the input voltages by the amount of voltage drops dynamic resistances of diodes 6 and 11, respectively, and cover diodes 8 and 13. Diode 8 is opened by positive polarity pulses from generator 21, larger in amplitude than the voltage on capacitor 9, by the amount of voltage drop across diode 8. With identical characteristics diodes 6 and 3 amplitudes of positive polarity pulses at the input of rectifying converter 19 correspond to the input voltage across terminals 1 and 2. This pulse voltage is converted by rectifying converter 19 to a constant voltage that goes to output terminal 24 for measuring or monitoring .

Diode 13 is opened by negative-polarity pulses from generator 2 1, larger in amplitude than the voltage on capacitor 14, by the amount of voltage drop across diode 13. With identical characteristics of diodes 11 and 13, the amplitude of negative polarity pulses at the input of the rectifier converter 20 corresponds to the magnitude of the input voltage at terminals 3 and 2. This pulse voltage is converted into a constant voltage similar to the previous, but negative polarity, and is fed to the output terminal 25.

Claims (1)

Figure 2d, g shows the characteristics of the first and second input converter. Invention Formula Measuring transducer containing a pulse transformer, a pulse generator, the output of which is through the limiting resistor co 5 0 5 0 five 0 five 0 five dinene with the first output of the first winding of the transformer and with the input of the rectifying converter of the amplitude of positive-polarity pulses, the output of which is connected to the first output of the measuring converter, the second output of the first winding of the transformer is connected to the common bus, and the first isolation diode and the first diode-capacitor storage cell whose diode anode is connected to the first input terminal of the measuring converter, and the cathode of this diode is connected to the cathode of the first isolation diode and the first in vodom capacitor memory cell, the anode of the diode is connected to the first separator to a first terminal of the second winding of the transformer, a second terminal which is connected to the second terminal -godnoy transducer and the second terminal of the memory cell capacitor, the capacitor is connected parallel to the discharge the first j a resistor, characterized in that, in order to expand the field of application, a second storage diode-condensation cell, a second isolation diode, a second discharge resistor, a rectifying converter of the amplitude of negative polarity impulses are introduced into it, and the pulse generator is designed as a PD generator pnyh pulses shifted between themselves in time, while the third input terminal is connected to the cathode of the diode of the second storage cell, the anode of this diode is connected to the anode of the second separating diode and The first terminal of the storage cell capacitor, the cathode of the second isolation diode is connected to the first terminal of the second transformer winding, the second terminal of the capacitor of the second storage cell is connected: the second input terminal, the second discharge resistor is connected in parallel to the capacitor of the second storage cell, the inputs of rectifying converters are connected to each other, and the output of the rectifying amplitude transducer of negative polarity pulses is connected to the second output of the measuring transducer. e ) L four I f G OHO T Us, four "R.2 UBl / x.2 &. /