RU98102783A - TRANSMITTER TO ENSURE A SIGNAL CHARACTERIZING A FLOW THROUGH A DIFFERENTIAL CONVERTER USING SIMPLIFIED DATA PROCESSING - Google Patents
TRANSMITTER TO ENSURE A SIGNAL CHARACTERIZING A FLOW THROUGH A DIFFERENTIAL CONVERTER USING SIMPLIFIED DATA PROCESSINGInfo
- Publication number
- RU98102783A RU98102783A RU98102783/28A RU98102783A RU98102783A RU 98102783 A RU98102783 A RU 98102783A RU 98102783/28 A RU98102783/28 A RU 98102783/28A RU 98102783 A RU98102783 A RU 98102783A RU 98102783 A RU98102783 A RU 98102783A
- Authority
- RU
- Russia
- Prior art keywords
- pressure
- flow
- signal
- pipeline
- transmitter according
- Prior art date
Links
- 230000001702 transmitter Effects 0.000 title claims 8
- 239000012530 fluid Substances 0.000 claims 3
- 239000007788 liquid Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 238000004886 process control Methods 0.000 claims 1
- 230000003068 static Effects 0.000 claims 1
Claims (2)
причем схема микро-ЭВМ сформирована так, что, по меньшей мере, два сомножителя аппроксимированы как функция, по меньшей мере, одного из параметров: температуры, статического давления и перепада давления.1. A process control transmitter connected to a fluid conduit comprising a first pressure sensor sensing a pressure in the pipeline and providing a signal (pressure in the pipeline) characterizing a pressure in the pipeline, a second pressure sensor sensing a pressure difference across the diaphragm in the pipeline and providing a signal (differential pressure) characterizing the differential pressure, a temperature measuring circuit formed to provide measurement of the temperature signal characterizing a fluid temperature, a microcomputer circuit connected to the first and second pressure sensors and to a temperature measuring circuit, and provided with power supply through the circuit, calculating the flow of fluid through the pipeline based on the pressure signal in the pipeline, the differential pressure signal and the temperature signal, and providing an output signal characterizing the flow, characterized in that the micro-computer circuit calculates the flow Q according to an equation having factors in general
moreover, the microcomputer circuit is formed so that at least two factors are approximated as a function of at least one of the parameters: temperature, static pressure and differential pressure.
3. Передатчик по п. 1, отличающийся тем, что член Еd2 по существу представлен в виде
4. Передатчик по п. 1, отличающийся тем, что коэффициент расширения газа Y1 по существу представлен в виде
5. Передатчик по п. 1, отличающийся тем, что плотность ρ для жидкости по существу представлена в виде
6. Передатчик по п. 1, отличающийся тем, что плотность ρ для газа по существу представлена в виде
7. Передатчик по п. 1, отличающийся тем, что коэффициент расхода Сd по существу представлен в виде
2. The transmitter according to claim 1, characterized in that the flow coefficient C d is essentially represented as
3. The transmitter according to claim 1, characterized in that the member Ed 2 is essentially represented as
4. The transmitter according to claim 1, characterized in that the gas expansion coefficient Y 1 is essentially represented as
5. The transmitter according to claim 1, characterized in that the density ρ for the liquid is essentially presented in the form
6. The transmitter according to claim 1, characterized in that the density ρ for gas is essentially represented as
7. The transmitter according to claim 1, characterized in that the flow coefficient C d is essentially presented in the form
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/503,166 | 1995-07-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
RU98102783A true RU98102783A (en) | 1999-12-10 |
Family
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