CN202614292U

CN202614292U - Intelligent fluid flow meter

Info

Publication number: CN202614292U
Application number: CN 201220278746
Authority: CN
Inventors: 李赞东; 许景妍; 巴帅
Original assignee: 丹东市环欣电子有限公司
Priority date: 2012-06-13
Filing date: 2012-06-13
Publication date: 2012-12-19

Abstract

The utility model provides an intelligent fluid flow meter, which is formed by a central processing unit single chip microcomputer and a power supply module. A solid-state storage unit, a display unit and a keyboard are correspondingly connected with each wiring port of the central processing unit single chip microcomputer; an electric quantity detection module and a rotary speed sensing unit are respectively connected with the corresponding wiring port of the central processing unit single chip microcomputer in an output manner; the electric quantity detection module is a fluid pump shaft power measuring and transmitting circuit; and a rotary speed sensor of the rotary speed sensing unit is mounted in a fluid pump by a pump shaft rotary speed setting structure of a sensing fluid body pump. The technical scheme is applicable to measurement of any fluid flow, is suitable for each measurement environment and is more suitable for a wider flow measuring range.

Description

The intelligence liquid flowmeter

Technical field

The utility model relates to the electric liquid flowmeter.

Background technology

Existing flow measurement instrument type is various, and mostly these flowmeters are sensor flange access infrastructure, and sensor is inserted to measure in the fluid line and obtained flow, and it need be installed under disconnection state, dismantles or keep in repair; The second, sensing element directly contacts with fluid, for having corrosivity, aggressive fluids or sneaking into the fluid of a large amount of impurity, has then limited to the measurement effect of this flow instrument, causes actual techniques problems such as sensing element damage easily; The 3rd, existing flowmeter needs specific mounting structure, and the straight length of certain-length need be equipped with in the upstream and downstream of its installation position, could guarantee the requirement of measuring accuracy; The 4th, when flow diminished, measuring error can strengthen.Still lack in the existing flow instrumentation and can be applicable to any fluid, any range and the flow measurement instrument in various pipeline environment.

Summary of the invention

The goal of the invention of the utility model is to provide a kind of can be applicable to various pipeline environment conditions, any fluid, can obtain the intelligent liquid flowmeter that high-precision flow is measured at any flow.The intelligent liquid flowmeter technical scheme that the utility model provides; Its major technique content is: a kind of intelligent liquid flowmeter; Its composition comprises central processing single chip and power module; The corresponding connection of each Wiring port of solid-state storage unit, display unit and keyboard and central processing single chip; The electric weight detection module is exported the corresponding Wiring port that is connected central processing single chip respectively with the revolution speed sensing unit, and described electric weight detection module is that circuit is sent in the quantitative change of fluid pump shaft horsepower meter, and the speed probe of described revolution speed sensing unit is provided with structure with induction fluid pump pump shaft rotating speed and is installed in the fluid pump.

The intelligent liquid flowmeter technical scheme that the utility model provides; Based on Hydrodynamics Theory, accomplish flow measurement through the characteristic working curve of fluid pump shaft power and flow, and through gathering fluid revolution speed value in real time; Come to revise in real time this characteristic working curve; The reflection actual flow situation that makes it more to press close to is dwindled measuring error, can good measuring accuracy all be arranged to various flows, especially low discharge.The present technique scheme be applicable to any fluid flow measurement, be applicable to various measurement environment, also adapt to wideer flow measurement range.

Description of drawings

Fig. 1 is the circuit composition frame chart of this intelligent liquid flowmeter

Fig. 2 serve as reasons shaft power N that the rotating speed gathered in real time revises and the N-Q characteristic working curve diagram of flow Q.

Embodiment

The intelligent liquid flowmeter of the utility model; Form by central processing single chip and power module; Solid-state storage unit, display unit and keyboard are connected with each corresponding Wiring port of central processing single chip, and wherein the high capacity solid-state memory can be preserved data such as nearly 3 years fluid total flow every day, fluid pump state, and data memory format can directly be used for the statistics of administrative authority; Greatly facilitate management, reduce human input.

Electric weight detection module and revolution speed sensing unit are exported respectively and are connected to the corresponding Wiring port of central processing single chip; The revolution speed sensing parts of described revolution speed sensing unit are provided with structure with the induction of responding to the fluid revolution speed and are installed in the fluid pump; Speed probe wherein can be selected speed probes such as magnetoelectric tachometric transducer, photoelectric tachometric transducer or Hall speed probe for use; This enforcement structure is partial to use magnetoelectric tachometric transducer; It has good in anti-interference performance and need not the technological merit that signal amplifies; Gather magnetoelectric tachometric transducer Inside coil output voltage pulse signal in real time by central processing single chip, and treatment conversion obtains to be tachometer value.Described electric weight detection module is a fluid pump shaft power work measurement transmission circuit.

Interrelated by shaft power N, rotation speed n and lift H and fluid pump flow Q, the internal relation of mutual restriction, when wherein certain parameter changed, corresponding variation then took place in corresponding curve.With selected fluid pump rotation speed n is constant; The N-Q characteristic working curve of drawing that obtains shaft power N and flow Q, according to this, central processing single chip internal data handling procedure will obtain fluid pump shaft power detected value from collection of electric weight detection module and processing; With above-mentioned characteristic working curve is mathematical model; Calculate flow value, meanwhile, gather the fluid pump tachometer value n of the revolution speed sensing unit of reflection fluid pump rotating speed in real time _Δ, this tachometer value n _ΔEspecially when occurring in the real work comprising that voltage ripple of power network, valve event etc. cause the fluid pump rotation speed change big, according to Q/Q _Δ=n/n _ΔObtain correction factor, thereby obtain rotation speed n _Δ, be mathematical model with this revised characteristic working curve down, obtain flow value accurately by the fluid pump shaft power detected value conversion that central processing single chip collected with the fluid pump characteristic working curve of met in practice.

In the present embodiment structure; Be connected with the wireless communication module of realizing that wireless communication data transmits with a Wiring port of central processing single chip; Be connected with the radio-frequency card module for reading and writing of pre-payment control and the output executing circuit of control external unit respectively with the corresponding Wiring port of central processing single chip; The read or write speed of high-speed radio-frequency card is fast, to realize the opening and closing of IC-card consumption control fluid circuit.

Claims

1. intelligent liquid flowmeter; Its composition comprises central processing single chip and power module; The corresponding connection of each Wiring port of solid-state storage unit, display unit and keyboard and central processing single chip; It is characterized in that electric weight detection module and revolution speed sensing unit export the corresponding Wiring port that is connected central processing single chip respectively; Described electric weight detection module is that circuit is sent in the quantitative change of fluid pump shaft horsepower meter, and the speed probe of described revolution speed sensing unit is provided with structure with induction fluid pump pump shaft rotating speed and is installed in the fluid pump.