RU2097775C1 - Phase shift-to-code transducer-converter - Google Patents

Abstract

FIELD: instrumentation engineering. SUBSTANCE: phase shift-to- code transducer-converter uses amplifiers, counter, generator cut in the multiplier circuit, switch; the amplifiers are used as scalers-shapers. The inputs of the scalers-shapers are used as inputs of the transmitter that feeds current and voltage signals; the signals from the outputs of the scalers-shapers are fed to the inputs of the multiplier; the multiplier output signal is fed to one input of the switch, the second input of the switch receives the signal from the radio-frequency generator, the signal from the switch output is fed to the input of the counter, the counter output serves as the device output. EFFECT: enhanced accuracy of measurements, simplified design and use as a power consumption monitor. 1 dwg

Description

 The proposed sensor Converter relates to the field of instrumentation and is intended for use in devices for monitoring power consumption of various electrical installations, as well as in electrical engineering.

 A known phase-to-code converter (ed. St. N 1374142, class G 01 R 25/00) is used in the field of instrumentation to convert an analog to a code.

 The disadvantage of this device is the complexity of the circuit, the low accuracy of the measurement and the inability to work as a transducer.

 Known phase-code converter (ed. St. N 1352396, class G 01 R 25/00), which contains shapers, switches, triggers, AND elements, and delay elements, a pulse generator, a timing unit, OR elements, counters and is used in radio measurement technology, in particular in digital phase meters.

 The disadvantage of this device is the complexity of the circuit, the low accuracy of the measurement and the inability to work as a transducer.

 Of the known converters, the closest in technical essence is the phase-to-code converter (ed. St. N 1314278, class G 01 R 25/00). This converter contains the first and second phase-shifting elements, the first and second voltage dividers, the first and second summing amplifiers, the first and second comparison units, which include a phase detector and a voltage to pulse frequency converter, first, second, third and fourth reversible counters, block of elements And, subtractor and pulse generator.

 The disadvantage of this device is the complexity of the circuit, the low accuracy of the measurement and the inability to use as a transducer.

 The purpose of the invention is to increase the accuracy of measurement, simplifying the design and making it possible to use it as a transducer for monitoring power consumption.

 This goal is achieved by the fact that in the phase-shift converter to the code containing amplifiers, counters, a generator, for use as a sensor-converter, the first and second phase-shifting elements, the first and second voltage dividers, the first and second comparison blocks, the block of elements And and a subtractor, an additional multiplier and a key are introduced, and the amplifiers are used as scale amplifiers, the counter used as a frequency divider, and the generator is selected as high-frequency for setting accuracy. New connections between functional elements have been introduced, the inputs of the amplifier-drivers are designed to supply current and voltage signals, the outputs of the amplifier-drivers are connected to the inputs of the multiplier, the output of the multiplier is connected to one input of the key, the second input of the key is connected to the output of the generator, the output of the key is connected to the input counter, the counter output is the output of the device.

 The block diagram of the proposed device is shown in the drawing and contains amplifiers-shapers 1 and 2 with adjustable transmission coefficients, a multiplier 3, a high-frequency pulse generator 4, a key 5 and a counter 6. The inputs of the amplifiers-shapers are designed to connect to current and voltage sources, the output counter is the output of the device. Shaper amplifiers are designed to generate the necessary signals for the multiplier, the multiplier generates the phase difference between the current and voltage signals, the high-frequency generator generates high-frequency pulses with a frequency value corresponding to the required measurement accuracy, the key generates a pulse sequence signal proportional to the phase shift of the current signals and voltage, the divider counter provides an output digital code according to the phase shift signal. Structurally, the device has a small size, compactness and a low number of functional elements, which ensures its reliability, replicability and use as a transducer.

 The proposed device operates as follows.

 The monitored current and voltage signals are fed to the inputs of the amplifiers-shapers 1 and 2, the signals from large-scale amplifiers-shapers are then sent to the inputs of the multiplier 3, from the output of the multiplier, the signal is then fed to one input of the key 5, the signal of the high-frequency pulse sequence comes to the second input of the key generator 4, from the output of the key, a pulse packet signal proportional to the phase shift arrives at the input of the counter 6, from the output of the counter the signal enters the communication line with the terminal device.

The use of new elements and the connections between them favorably distinguishes the proposed sensor-converter by the cheaper design and allows to achieve high measurement accuracy (in the considered embodiment, when setting the generator frequency of 20 MHz, accuracy 2.5 • 10 ^{-6 is} achieved), the use of the sensor to control power consumption makes it possible to optimize electrical modes of operation of enterprises.

Claims (1)

 A phase-to-phase sensor transducer into a code comprising the first and second amplifiers, a pulse counter, a pulse generator, characterized in that a multiplier and a key are introduced into it, the pulse generator being made in the form of a high-frequency generator, and the first and second amplifiers are made in the form of the first and the second large-scale amplifiers-shapers with adjustable transmission coefficients, the signal from each output of which is intended for supply to the corresponding input of the multiplier; from the output of the multiplier, the signal is intended for supply at the first input of the key, from the output of the high-frequency generator, the signal is intended to be fed to the second input of the key, from the output of the key, the signal is intended to be fed to the input of a pulse counter, the output of which is the output of the device, and the inputs of the first and second amplifiers-shapers with adjustable transmission coefficients are respectively the first and second inputs of the device.