SU385227A1 - METHOD OF MEASURING VOLTAGE - Google Patents

METHOD OF MEASURING VOLTAGE

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Publication number
SU385227A1
SU385227A1 SU1653156A SU1653156A SU385227A1 SU 385227 A1 SU385227 A1 SU 385227A1 SU 1653156 A SU1653156 A SU 1653156A SU 1653156 A SU1653156 A SU 1653156A SU 385227 A1 SU385227 A1 SU 385227A1
Authority
SU
USSR - Soviet Union
Prior art keywords
scale
frequency
voltage
measuring voltage
output
Prior art date
Application number
SU1653156A
Other languages
Russian (ru)
Inventor
К. Золотков Л.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to SU1653156A priority Critical patent/SU385227A1/en
Application granted granted Critical
Publication of SU385227A1 publication Critical patent/SU385227A1/en

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  • Measurement Of Current Or Voltage (AREA)

Description

Изобретение относитс  к электроизмерительной технике. Известны спосабы измерени  на пр жений, основанные на масштабно.м преобразовании измер емого напр жени  в частоту импульсов с последующим преобразованием частоты в цифровую форму. Дл  этих способов Характерна погрешность , вызванна  неточностью установки заданного коэффициента масштабного лрео-бразовани . Цель изобретени  - повышение точности измерений. Достигаетс  она тем, что источник опорного напр жени  согласно предлагаемому способу периодически (например, раз в сутки) .подключают поочередно к выходу и входу масштабного преОб.разовател . Одновременно измен ют врем  интегрировани  частоты или частоту в число раз, равное заданному коэффициенту масштабного преоб-разовати , и коэффициент масштабного дреобразовани  измен ют до совпадени  результатов измерени . Уравнение преобразовани  преобразовател  «напр жение - частота на основном пределе измерени  имеет вид ,, где / - выходна  частота; k - крутизна преобразовани ; Ux - измер емое напр жение. Результат, получаемый на счетчике: N UJ, где Т - врем  интегрировани  (врем  подсчета импульсов с выхода преобразовател  «Напр жение - частота). Дл  напр ж.ений, превышающих динамический диапазон преобразовател , примен ют масштабный преобразователь - делитель напр жени  (коэффициент делени  обычно выбирают кратным 10). При этом результат измерени  лг, k-Ч,-т,(3) п - коэффициент масштабного преобразовани ; п - погрешность задани  коэффициента преобразовани , завис ща  от неточности задани  номиналов делител , температурного и временного и,х ухода. Источник опорного напр жени  периодически (например, лосле каждого включени  прибора в сеть и его прогрева) подключают поочередно к выходу и входу масштабногоThis invention relates to electrical measuring technology. Methods of measuring voltage are known, based on a scale of conversion of the measured voltage to a pulse frequency with subsequent conversion of the frequency to digital form. For these methods, the error is characteristic, caused by the inaccuracy of the installation of a given coefficient of scale lreo-brazi. The purpose of the invention is to improve the measurement accuracy. It is achieved by the fact that the source of the reference voltage according to the proposed method periodically (for example, once a day). Is connected in turn to the output and the input of a large-scale transformer. At the same time, the frequency integration time or frequency is changed by a number equal to the specified scale conversion factor, and the scale conversion factor is changed until the measurement results match. The transducer equation of voltage-frequency at the main measurement limit is, where / is the output frequency; k is the slope of the transform; Ux is the measured voltage. The result obtained on the counter is: N UJ, where T is the integration time (pulse counting time from the output of the voltage-frequency converter). For voltages exceeding the dynamic range of the converter, a scale converter - voltage divider is used (the division factor is usually chosen to be a multiple of 10). At the same time, the result of the measurement of lg, k-h, -t, (3) n is the scale conversion factor; n is the uncertainty of setting the conversion factor, depending on the inaccuracy of setting the values of the divider, temperature and time, and x care. The source of the reference voltage is periodically (for example, the losle of each power-up of the device to the network and its warm-up) is connected alternately to the output and input of the large-scale

SU1653156A 1971-05-13 1971-05-13 METHOD OF MEASURING VOLTAGE SU385227A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1653156A SU385227A1 (en) 1971-05-13 1971-05-13 METHOD OF MEASURING VOLTAGE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1653156A SU385227A1 (en) 1971-05-13 1971-05-13 METHOD OF MEASURING VOLTAGE

Publications (1)

Publication Number Publication Date
SU385227A1 true SU385227A1 (en) 1973-05-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU1653156A SU385227A1 (en) 1971-05-13 1971-05-13 METHOD OF MEASURING VOLTAGE

Country Status (1)

Country Link
SU (1) SU385227A1 (en)

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