Fluid closed loop type on-line liquid density transmitter

A liquid density, closed-loop technology, applied in the direction of determining the specific gravity by measuring the pressure difference, which can solve the problems of data deviation, large workload, and inability to obtain data curves, achieve smooth output value curves, avoid accidental errors, installation and use handy effect

Inactive Publication Date: 2008-09-24
马兆辉
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Problems solved by technology

The traditional measurement of density is mainly by measuring the mass and volume of the unit liquid separately. There are three commonly used methods, namely the density bottle weighing method, the density meter method, and the U-shaped tube method. Data errors are often caused by human factors. At the same time, there is a certain error between the temperature during sampling and the temperature during measurement. The pressure changes in real time, and the above measurement methods cannot know the state of the liquid at any time online, which seriously restricts the improvement of the automation level of the enterprise
[0003] In addition, the liquid will fluctuate during the flow process, which will lead to deviations in the data collected online, and then make the calculated density value show jumping changes, and it is impossible to obtain a smooth data curve

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  • Fluid closed loop type on-line liquid density transmitter
  • Fluid closed loop type on-line liquid density transmitter

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Embodiment Construction

[0024] Such as figure 1 Shown in -2: Fluid closed-loop integrated online liquid density test transmitter, mainly composed of a density probe and an output display communication meter, which is characterized in that: a precision differential pressure sensor and a temperature sensor are arranged on the density probe, and the meter head On it, temperature compensator, density closed-loop calculation and temperature compensation processor, liquid crystal display control system, real-time data display device and interface for power supply to the transmitter, the precision differential pressure sensor on the density probe is connected to the differential pressure sampling electronic circuit , the output signal of the differential pressure sampling electronic circuit is sent to the density closed-loop calculation and temperature compensation processor, the display signal of the density closed-loop calculation and temperature compensation processor is sent to the display through the li...

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Abstract

The invention belongs to a fluid closed loop type integrated on-line liquid density transmitter which is applicable in density measurement of flowing liquid and static liquid in pipes and cans. The invention includes a precise difference sensor and a professional sampling and closed loop control computer integrated circuit board and a specially matching temperature compensation controller; the differential pressure sensor measures the pressure of different pressure pipes, converts modulus and calculates the closed loop control and displays the density and the medium temperature to the gauge head of an instrument with a double four-digit display screen, and has remote monitoring and maintenance according to a HART agreement.

Description

technical field [0001] The invention belongs to a fluid closed-loop integrated online liquid density transmitter, which is suitable for density measurement of flowing liquid and static liquid in pipelines and tanks. Background technique [0002] The measurement of liquid density can provide data for process design, infer the purity of substances, quickly determine the concentration of substances, etc. Density is an important indicator in the intermediate control and finished product inspection of many liquid products. The traditional measurement of density is mainly by measuring the mass and volume of the unit liquid separately. There are three commonly used methods, namely the density bottle weighing method, the density meter method, and the U-shaped tube method. Data errors are often caused by human factors. At the same time, there is a certain error between the temperature during sampling and the temperature during measurement. The pressure changes in real time, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/26
Inventor 马兆辉
Owner 马兆辉
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