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Multi-zone analogue-discrete current sensor. RU patent 2459249. |
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FIELD: information technology. SUBSTANCE: multi-zone analogue-discrete current sensor has a first and a second operating four-terminal network, a group of switch elements equal to the number n of relay elements, a pulse generator, a univibrator, a first and a second NOT logic element, a first and a second three-input AND logic element, a delay element, a first and a second binary counter, a first and a second memory register, an arithmetic-logic unit, which compares codes, counts the number of '0' and '1' signals, and also performs the inhibit function if the number of '0' and '1' signals is not equal. EFFECT: high accuracy of operation of a multi-zone scanning transducer. 5 dwg
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Signal mixer / 2452010 Signal mixer comprises a multiplying Hilbert cell, the first and the second output transistors of the channel "Y", the first and second dividing separators, from the first to the third current-stabilising dipoles, a load circuit, the first and second additional transistors. |
Analogue mixer of two signals with output cascode / 2450353 Analogue mixer of two signals with an output cascode comprises an input multiplying Gilbert cell, the first and second output transistors, the first and second load resistors, the first and second additional resistors, the first and second current-stabilising dipoles. |
Analogue mixer of two signals / 2450352 Analogue mixer of two signals comprises an input multiplying Gilbert cell, the first and second additional transistors, the first and second load resistors, the first and second additional resistors, the first and second dipoles with low differential resistance by AC, the first and second circuits of static mode setting, the first and second additional current-stabilising dipoles. |
Device for the knapsack problem solution / 2443013 FIELD: computational engineering. SUBSTANCE: additional groups of m fifth I elements, a delay element, a trigger, a group of elements, a group of sixth registers were introduced, wherein the output of each of them being connected to the first input of the fifth I elements group, the second input of which is connected to the startup unit, the delay element input is connected startup unit, its output being connected to the first trigger input and the second input of which is connected to the counter overflow output and the output being connected to the second I element input. EFFECT: enhanced the functional capabilities of the device with reference to fast determination of optimum knapsack filling with various items in such a the total value of the knapsack is as large as possible, its total weight being fixed. 1 dwg, 1 dwg |
Discrete-analogue device / 2432611 Device has five analogue multipliers, four analogue subtractors and three analogue adders. |
Discrete-analogue device / 2427036 Device has first and second analogue subtractors, first and second analogue multipliers and an adder. Analogue values (one or zero) or discrete values (with logic level one or zero) enter first, second and third data inputs in parallel. An additional data input of device "1" from which the value of the signal entering the third data input of the device is subtracted. |
Discrete-analogue device / 2422897 Discrete-analogue device has a first, a second, a third, a fourth, a fifth, a sixth, a seventh, an eighth, a ninth and an extra data input, a first, a second, a third, a fourth, a fifth, a sixth, a seventh, an eighth, a ninth, a tenth, an eleventh, a twelfth and a thirteenth analogue subtracter, as well as a first, a second, a third and a fourth analogue multiplier, the extra data input of the device "1" is the first data input of the first-thirteenth analogue substracter. |
Multi-zone roll-out converter / 2422896 Multi-zone rolling out converter has a first electrical power source, series-connected input signal source and roll-out amplifier, consisting of series-connected first adder and an integrator, the output of which is connected to a group of n main relay elements, where n≥3 is an odd number, the outputs of which are connected to a second adder whose output if connected to the second input of the first adder. The output of the fist electrical power source is connected to the roll-out amplifier and specifically to power terminals of the first and second adders, the integrator and power terminals of the main relay elements. The disclosed converter also includes an output stage consisting of (n≥3), where n is an odd number, extra optocouples connected in series to extra relay elements and a third adder, as well as a second electrical power source. |
Analogue multiplier of voltages / 2396595 Device comprises the first source of the first multiplied voltage ux, the second source of the first multiplied voltage ux antiphased to the first source, the first and second antiphased sources of the second multiplied voltage uy, the first, second, third and fourth input transistors, the first and second current-stabilising two-terminal networks, the first load element, new connections are included - base of the second inlet transistor is connected to the first source of the second multiplied voltage uy, base of the fourth inlet transistor is connected to the second source of the second multiplied voltage uy, besides between emitter of the first input transistor and bus of power supply source there is the first additional capacitor connected by alternating current, and between emitter of the third input transistor and bus of power supply source there is the second additional capacitor connected by alternating current. |
Zero current sensor / 2390906 Zero current sensor includes in-series connected control signal source, the first four-pole device, summator, integrator, the first relay element the output whereof through the second four-pole device is connected to the second input of summator, in-series connected proportional-differentiating element, demodulator, smoothing filter, the second relay element the output of which is connected to output terminal. Also to the device there introduced is non-linear element with dead zone, the input of which is connected to output of integrator, and output is connected to the third input of summator; at that, input of proportional-differentiating element is connected to output of the first relay element. |
Method of measuring current in conductor and apparatus for realising said method / 2453853 Method and apparatus employ two Hall sensors placed in gaps of one or two magnetic conductors. Like planes of the Hall sensors are identically aligned relative external interference-generating fields, and the Hall sensors are arranged relative the measured magnetic field such that the measured magnetic flux enters the plane of one sensor and comes out of the like plane of another sensor. Output voltages of the Hall sensors are applied across the inverting and non-inverting inputs of a differential amplifier. The earth terminal of the amplifier is connected to like output leads of the Hall sensors. The measurement result is defined as the difference between output voltages, wherein voltages induced by the external interference-generating magnetic and electric fields are compensated for. |
Dc voltage determining method / 2452969 In direct-current voltage determining method which is based on formation of circuit with high limiting input resistance the monitoring of voltage is performed at input limiting resistance of sensitive member working in nanoampere range, from the output of which the voltage presence signal is supplied to the circuit of its processing and conversion to sound-and-light signals. |
Measurement method of voltages on earthing device / 2452968 Points of earthing device, between which voltage measurement is required, are connected by means of insulated wire made from resistive material; current is measured in that wire and voltage is calculated as per pre-measured resistance value of wire and measured current value. |
Fibre-optic current measuring transducer / 2451941 Apparatus has a light source, a shaping optical system in form of a microlens, a polariser, a polarisation-neutral beam splitter, a unit for detecting intensity of orthogonally polarised light components, which consists of an analyser in form of a polarisation beam splitter and two photodetectors. The sensitive element is made from a spun light guide in form of a loop around a conductor carrying the measured current, said loop consisting of at least one fibre winding. The unit for reverse input of radiation into the fibre is in form of a microlens and a Faraday mirror. The end faces of the light guide are made without axial reflection of light, and the spun light guide is selected with different signs of relative temperature coefficients, Verdet constants of the material of the core of the fibre and length beats of the built-in linear double refraction. |
Device for compensation of error of current trasformer / 2449296 Device contains current transformer, instrument shunt, supplemental voltage unit, integrator with adding element at input, the first input of which is connected to instrument shunt and the second input is connected to secondary winding of current transformer; bipolar relay element connected to integrator output; signal heteropolarity detector the first input of which is connected in parallel to instrument shunt and the second input is connected to integrator output; logic "AND" gate with inversion at output, the inputs of which are connected to outputs of relay element and signal heteropolarity detector, and its output signal controls the supplemental voltage unit, series-connected in circuit of current transformer and instrument shunt. |
Current sensor / 2445638 Sensor includes two Hall probes, two current leads, two amplifiers, reference voltage source and instrument amplifier. Output of the first current lead is connected to input of the second current lead so that current creates magnetic fields in them for the first and the second Hall probes in opposite directions. Outputs of the first and the second Hall probe are connected to inputs of the first and the second amplifier respectively. Outputs of amplifiers are connected to inputs of instrument amplifier the output of which is current sensor output. Output of reference voltage source, which is equal to half the nominal value of voltage of power supply, is supplied to instrument amplifier offset input. |
Sensor for measuring alternating current in conductor and indicator system having said sensor / 2444019 Sensor has a current detector as part of a current transformer mounted on a conductor, and a sensor circuit having a non-electric wave signal transmitter, wherein the sensor circuit has a current-to-frequency converting loop. The invention also discloses an indicator system for the conductor, which has a current sensor, communication line, apparatus for measuring voltage across the conductor, an analytical unit for measuring frequency of the pulsed current signal and conversion thereof into current which is proportional to the frequency of the current signal, threshold current and voltage detectors, indicators of the state of electrical processes in the conductor during operation of the threshold voltage detector. |
Current integrator / 2442177 FIELD: radio, physics. SUBSTANCE: invention refers to a measurement a technique and can be used for measuring small electric currents and charges. The technical result is the measurements accuracy increasing. To achieve this result, the device includes main and auxiliary current integrators, each of which contains a source follower with the insulated gate field-effect transistor, the follower's output is connected to the inverting input of operational amplifier; capacitor is connected between the output of the operational amplifier and the gate of the transistor, and the input of the first integrator through switch and a resistor connected to ground, and output of the first integrator through the second switch is connected to the input of the second integrator, and output of the second integrator trough a resistor connected with balancing contact of the of the first amplifier; this connection provides the negative feedback when the mentioned above second switch is closed. EFFECT: increased measurements accuracy. 1 dwg, 1 dwg |
Fibre-optic current transformer / 2438138 Device includes at least two current-leading insulated conductors enveloped with sensitive elements - coils from optic fibre, device for introducing polarised light signal to their optic fibre and device for its separation, which are optically connected to coil and included in measuring-converter unit. Conductors with coils from optic fibre are enclosed in terminal box; coils have various number of turns, which is made on an accrual basis, and their inlet and outlet ends are grouped and taken outside the terminal box. Optical communication of sensitive elements - coils with the device for introducing to the optic fibre of polarised light signal and with device for its separation is performed by means of the corresponding groups of input and output ends of coils of the appropriate optical dividers, one common multi-strand fibre optic cable and the appropriate optic connectors. Processing algorithm of measuring signal has been implemented in measuring and converting unit by means of programme code entered to microcontroller memory. |
Detecting element for fibre-optic electric current and magnetic field interferometric sensor / 2437107 Detecting element is in form of a piece of a quartz fibre light guide with internal linear double refraction placed on a circle. The fibre light guide has a structure with optical parameters which periodically recur along the fibre. The periodic structure is in form of a spiral structure with internal linear double refraction. The pitch Ltw of the spiral, beat length Lb of internal linear double refraction, temperature coefficient αb of internal linear double refraction, radius R of the cirlce of the piece of fibre light guide, radius r of the cross-section of the fibre light guide, the operating wavelength λ of the interferometric sensor and refraction index no(λ) of the cladding of the fibre light guide are selected from the relationship |
Method of determining amplitude and phase of equivalent current sinusoid in circuit with ferromagnetic core / 2247998 Method comprises measuring instantaneous values of sinusoidal voltage and nonsinusoidal current in the circuit. The power averaged over the period and effective values of voltage and current can be judged from the digital readings of instantaneous values of sinusoidal voltage and nonsinusoidal current in the circuit. The phase of the equivalent sinusoid is determined from the ratio of the power to the product of their effective values. |
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