SU599216A1

SU599216A1 - Operator conductivity measuring arrangement

Info

Publication number: SU599216A1
Application number: SU762426509A
Authority: SU
Inventors: Фридун Гамзаевич Гусейнов; Нариман Рахманович Рахманов; Владимир Михайлович Зауберман
Original assignee: Отделение Азербайджанского Научно-Исследовательского Института Энергетики Им. И.Г.Есьмана
Priority date: 1976-12-03
Filing date: 1976-12-03
Publication date: 1978-03-25

Description

1one

Изобретение относитс к электроизмерительной технике.This invention relates to electrical measuring technology.

Известно устройство дл измерени операторной проводимости, которое содержит усилитель , устройство умножени , преобразователь , блок индикации 1.A device for measuring operator conductivity is known, which comprises an amplifier, a multiplier, a converter, a display unit 1.

Однако функциональные возможности устройства ограничены.However, the functionality of the device is limited.

Известно также устройство дл измерени It is also known a device for measuring

операторной проводимости, содержащее преобразователь тока в напр жение и два идентичных канала преобразовани , содержащих последовательно соединенные выпр митель, накопитель , вычитающее устройство, блок согласовани , первый ключ, аналого-цифровой преобразователь, второй ключ, а также блок опорного напр жени , выход которого через блок уставок опорного напр жени соединен с управл ющим входом вычитающего устрсства , выход аналого-цифрового преобразова тел соединен со входом блока цифровой индикации , выход выпр мител соединен со входом первого ключа, вход выпр мител первого канала преобразовани соединен с выходом преобразовател тока в напр жение, а вход аналого-цифрового преобразовател первого канала преобразовани соединен со входомoperator conductivity, containing a current-to-voltage converter and two identical conversion channels containing a series-connected rectifier, accumulator, subtractive device, matching unit, first key, analog-to-digital converter, second key, as well as a reference voltage block whose output through the reference voltage setting block is connected to the control input of the subtracting device, the analog-digital converter output is connected to the digital indication block input, the rectifier output is connected to the first key input, the rectifier input of the first conversion channel is connected to the output of the current to voltage converter, and the analog-to-digital converter input of the first conversion channel is connected to the input

аналого-цифрового преобразовател второго ка нала преобразовани 2.analog-digital converter of the second channel of the conversion 2.

Однако диапазон функциональных возможностей устройства ограничен.However, the range of functionality of the device is limited.

Цель изобретени - расширение функциональных возможностей устройства.The purpose of the invention is to expand the functionality of the device.

Это достигаетс тем, что в устройство дл измерени операторной проводимости, содержащее преобразователь тока в напр жение и два канала преобразовани , каждый из которых содержит выпр митель, накопитель, вычитающее устройство, блок согласовани , два ключа, аналого-цифровой преобразователь, блок цифровой индикации, блок опорного напр жени , блок уставок опорного напр жени , введены нуль-орган, устройство сброса, хронизатор , пересчетное устройство, блок логики , вычислительное устройство, причем вход выпр мител второго канала преобразовани через нуль-орган соединен сThis is achieved in that a device for measuring operator conductivity, containing a current-to-voltage converter and two conversion channels, each of which contains a rectifier, a drive, a subtractive device, a matching unit, two keys, an analog-to-digital converter, a digital display unit, the reference voltage block, the reference voltage settings block, a null organ, a reset device, a chronizer, a counting device, a logic block, a computing device are entered, with the rectifier input of the second channel converting mations through zero-body connected to

Claims

the input of the chronizer, the first output of which is connected through serially connected scaling device and logic unit to the inputs of two-channel analog-to-digital converters in conversion; the second output of the chroniser is connected to the input of the reset device, the first and second outputs of which are connected to the corresponding two-channel control inputs of the two channels transformations, and the inputs of the computing device are connected to the corresponding outputs of the second keys of the two conversion channels. The drawing shows the structural electrical circuit of the proposed device. The device contains a rectifier 1, a current-voltage converter 2, a rectifier 3, accumulators 4 and 5, a zero-organ 6, a chronizer 7, a reset device 8, a counting device 9, a logic block 10, a reference voltage blocks 11 and 12 blocks 13 and 14 of the reference voltage settings, subtractive devices 15 and 16, matching blocks 17 and 18, analog-digital converters l and 20, digital display blocks 21 and 22, computing device 23, keys 24-27. The device works as follows. The signal of the process being measured is fed to the rectifier 1 in the voltage channel and the rectifier 3 in the current channel, in the first case the signal is converted from alternating to constant, and in the second, the measured current is converted into alternating voltage, which in turn converts rectifier 3 in a constant. The rectified voltage enters the accumulators 4 and 5, simultaneously with the null-organ synchronized with the frequency of the measured signal, a signal is generated that triggers 7. At the output of the synchronizer, a rectangular voltage is obtained, in phase coinciding with the measured voltage. This voltage is fed to the input of the device 8, where, after the end of the conversion process to the code, a control pulse is generated for the accumulators 4 and 5 in the voltage and current measurement channels. In addition, the voltage is supplied from the chronizer to a counting device 9, the output of which is a sequence of voltage pulses whose duration is equal to the length of the half-wave of the voltage being measured. This sequence of pulses, entering the input of block 10, forms pulse voltages at their output, which, at the beginning of the last half period of the measured voltage, form a trigger signal for analog-to-digital converters. Simultaneously with these processes, a stable reference voltage is formed in blocks 11 and 12, the value of which is set by adjusting devices in blocks 13 and 14, respectively, the nominal values of the measured values. From the output of blocks 13 and 14, the reference voltage is fed to the second input of the subtractors 15 and 16, where it is algebraically added to the measured voltage coming from the drives 4 and 5. At the output of the subtractors 15 and 16, a difference signal is formed, which is fed to the input of blocks 17 and 18, where the voltage is scaled and fed to the inputs of analog-to-digital converters 19 and 20, from the outputs of which the generated code enters the blocks 21 and 22 and the computing device 23, where the incoming discrete values of the fluctuations of the current and voltage are processed and the values of the operator conductivity or the operator resistance Z (p) are output. If it is necessary to measure the nominal values of measured values, the keys 24-27 connect the connections, by means of which the signal from the rectifiers 1 and 3 is fed to the inputs of analog-to-digital converters 19 and 20, from the outputs of which goes to the digital display units 21 and 22. In this case, the computing device 23 is turned off. An apparatus for measuring operator conductivity comprising a current-to-voltage converter and two identical conversion channels comprising a series-connected rectifier, a drive, a subtractor, a matching unit, a first key, an analog-to-digital converter, a second key, and a reference voltage block unit, whose output through the reference voltage setting block is connected to the control input of the subtractor, the output of the analog-digital converter is connected to the input of the digital block In this case, the output of the rectifier is connected to the input of the first key, the input of the rectifier of the first conversion channel is connected to the output of the current-to-voltage converter, and the input of the analog-digital converter of the first conversion channel is connected to the input of the analog-digital converter of the second conversion channel, that in order to expand the functionality of the device, a null organ, a reset device, a chronizer, a counting device, a logic unit, a computing device are introduced, and the input is The second channel conversion math is connected to the chronizer input through a null organ, the first output of which is connected through serially connected scaling device and logic unit to the inputs of analog-digital converters of two conversion channels, the second output of the chroniser is connected to the input of the reset device, the first and second outputs of which are connected with the corresponding control inputs of the accumulators of the two conversion channels, and the inputs of the calculating device are connected to the corresponding outputs of the second key second converting two channels. Sources of information taken into account in the examination: 1. USSR Author's Certificate No. 429361, cl. G 01 R 19/04, 02.06.72.

2. USSR author's certificate No. 298899, cl. G 01 R 19/02, 04.11.64.