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Flux integrating instrument of iterating differential pressure

A flow totalizer and iterative technology, applied in the field of flow totalizers, can solve problems such as inability to solve errors, lack of real-time performance, etc., and achieve the effect of improving the turndown ratio and low cost

Inactive Publication Date: 2007-09-12
张国仁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the iterative method is used, which requires manual operation of computers or calculators, so there is no real-time performance, and the error of the calculation point can only be known but cannot be solved.

Method used

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  • Flux integrating instrument of iterating differential pressure
  • Flux integrating instrument of iterating differential pressure
  • Flux integrating instrument of iterating differential pressure

Examples

Experimental program
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Effect test

Embodiment Construction

[0027] The function of the platinum resistance differential quotient measuring circuit is to measure the temperature of the measured medium, and the purpose of measuring the temperature is achieved by measuring the resistance value of the platinum resistance. The temperature is used to look up the table to calculate the density of the measured medium, as well as the pipe diameter D under working conditions, the opening diameter d of the throttling element and the diameter ratio β.

[0028]The platinum resistance Rt to be tested from the outside is connected to the terminal of the instrument in a three-wire system, and then connected to the first analog switch circuit through the internal connection similar to the internal standard resistance RH and RL. When working, the MCU Pl.1 and P1.2 ports control the bit selection terminals A and B of the 4052 through the driver 7406 and the optocoupler TLP521-2, and then connect the constant current source I1 to RH, RL and Rt in turn to g...

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Abstract

The present invention relates to a flow integrating instrument, specially, it is a differential pressure interative flow integrating instrument. It is formed from platinum resistance difference quotient measuring circuit; pressure and differential pressure difference quotient measuring circuit; PWM output circuit; keyboard and displaying circuit; power supply circuit and microcontroller circuit. Said invention also provides its application range.

Description

technical field [0001] The invention relates to a flow totalizer, in particular to a differential pressure iterative flow totalizer. Background technique [0002] The throttling device is a set of devices for generating a static pressure difference in the fluid flowing in the pipeline. It consists of three parts: a throttling element, a pressure taking device and a straight pipe section that meets the requirements. The throttling element is obtained by mechanical processing to make the fluid shrink and have different shapes, and there are three forms of orifice plate, nozzle, and Venturi tube. The orifice plate is a circular thin plate, the nozzle is a cylindrical body that smoothly forms a throat, and the Venturi tube is a cylindrical short tube that smoothly forms a throat and diffuses smoothly. The pressure taking device is a set of equipment for measuring the pressure difference before and after the throttling element in a certain way. It is divided according to the dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/36
Inventor 张国仁安树祥
Owner 张国仁