CN102445241A - Magnetic-sensing-type flow sensing system - Google Patents
Magnetic-sensing-type flow sensing system Download PDFInfo
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- CN102445241A CN102445241A CN2010102984308A CN201010298430A CN102445241A CN 102445241 A CN102445241 A CN 102445241A CN 2010102984308 A CN2010102984308 A CN 2010102984308A CN 201010298430 A CN201010298430 A CN 201010298430A CN 102445241 A CN102445241 A CN 102445241A
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Abstract
The invention discloses a magnetic-sensing-type flow sensing system used for measuring the volume flow of a fluid, and belongs to the field of fluid measurement. The technical scheme adopted by the invention is as follows: the magnetic-sensing-type flow sensing system provided by the invention comprises a Venturi tube, a high pressure chamber, a high pressure piston, a low pressure chamber, a low pressure piston, high pressure chamber magnetic steel, a high pressure chamber magnetic-sensing component, a high pressure chamber spring, low pressure chamber magnetic steel, a low pressure chamber magnetic-sensing component, a low pressure chamber spring, a high pressure signal conditioner, a low pressure signal conditioner, a multi-way changeover switch, an A/D (analog/digital) converter, a single chip microcomputer and a liquid crystal display unit. A pressure drop is generated when the fluid flows through the diameter-reducing Venturi tube; high pressures and low pressure values are measured by the high pressure chamber magnetic-sensing component and the low pressure chamber magnetic-sensing component; high pressures and low pressure signals are collected by the multi-way changeover switch, the A/D converter and the single chip microcomputer; and the flow value is calculated internally, and the flow of the fluid in a pipeline is displayed on the liquid crystal display unit. The magnetic-sensing-type flow sensing system has a simple structure and is suitable for flow measurement of different types of fluids.
Description
Technical field
The present invention relates to a kind of Mageneto-sensitive type flow sensing system, especially a kind of flow sensor of magnetosensitive Hall element is applicable to that the pipeline flow of gas, liquid is measured.
Background technology
Development along with instrumental technique; Increasing flow instrument is applied to each industrial circle; According to the most popular, classification the most widely at present, flowmeter can be divided into: the vortex shedding flow meter in volumeter, differential pressure flowmeter, suspended body flowmeter, turbo flow meter, electromagnetic flowmeter, the fluid oscillating flowmeter, mass flowmeter and plug-in type flow meter.Wherein differential pressure flowmeter occupies important status with the application characteristic of himself always in flow measurement, and about 60% what use is throttle differential flowmeter in flow measurement in China, and it is widely used in industrial and mining enterprises.The classification of pressure type flowmeter is like orifice flowmeter, Venturi meter, uniform speed tube's flowmeter etc.Venturi meter is a kind of throttling flow meter; It utilizes the differential pressure of restriction device front and back and the relation of mean flow rate and flow; According to differential pressure measurement value calculated flow rate, venturi flowmeter plug-in unit simple in structure, no does not disturb fluid to flow, crushing is little, receive the physical properties of fluids variable effect little; Be convenient to enforcement, safe and reliable, measuring accuracy is high.Venturi tube can obtain the pressure differential of straight length and trunnion section, needs pressure difference transmitter to change the digital signal that the simulating signal of pressure differential is changed into pressure differential.The pressure difference transmitter of existing Venturi tube directly contacts with fluid, causes that Venturi meter is corrosion-resistant, heat-resisting quantity is poor.Existing Venturi meter adopts proprietary pressure unit, has the uncontrollable shortcoming of range ability.
Summary of the invention
The objective of the invention is to the deficiency to prior art, a kind of Mageneto-sensitive type flow sensing system is provided,, realize the high-acruracy survey of flow, adapt to the flow measurement of corrosive fluid according to the flow rate test requirement of all kinds of gases, liquid.
The technical scheme of technical solution problem of the present invention is: a kind of Mageneto-sensitive type flow sensing system comprises Venturi tube 1; High pressure chest 2; High pressure piston 3; High pressure chest magnet steel 4; High pressure chest spring 5; High pressure chest magneto sensor 6; High-voltage signal conditioning 7; Low-voltage signal conditioning 8; Low-pressure cavity 9; Low-pressure piston 10; Low-pressure cavity magnet steel 11; Low-pressure cavity spring 12; Low-pressure cavity magneto sensor 13; Multicircuit switch 14; A/D conversion 15; Single-chip microcomputer 16; Liquid crystal display 17.
Know-why of the present invention is:
Adopt the Venturi tube throttling, according to bernoulli equation and fluid law of continuity, the pipeline flow size is directly proportional with the square root of the pressure reduction of Venturi tube straight tube end and trunnion end.Venturi tube becomes differential pressure signal to flow signal; Fluid promotes high pressure chest piston and low-pressure cavity piston, and the straight length pressure of Venturi tube is directly proportional through the relative distance of high pressure chest magneto sensor with the high pressure chest magnet steel respectively; The contraction section pressure of Venturi tube is directly proportional through the relative distance of low-pressure cavity magneto sensor with the low-pressure cavity magnet steel respectively; Pressure signal is converted into current signal through magneto sensor, converts digital signal to through A/D again and gets into single-chip microcomputer, and single-chip microcomputer calculates flow according to flow formula, has realized the collection and the processing of flow, and on LCD, shows flow number.
Advantage of the present invention is:
1, system architecture is simple, and differential pressure transporting adopts magneto sensor, low cost of manufacture.
2, system reliability is good, Venturi tube plug-in unit simple in structure, no, does not disturb fluid to flow.
3, detection medium adaptability is strong, is suitable for measuring various types of fluids, and single-phase flow and polyphasic flow.
4, range ability scalable is scalable measuring amount journey through changing high pressure chest with the different spring of elasticity coefficient in the low-pressure cavity.
5, the detection adaptability for working condition is strong, magneto sensor and measured fluid isolation, high temperature resistant, corrosion resistant characteristics that measuring system has.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention.
Among the figure:
1, Venturi tube; 2, high pressure chest; 3, high pressure piston; 4, high pressure chest magnet steel 5, high pressure chest spring; 6, high pressure chest magneto sensor; 7, high-voltage signal conditioning; 8, low-voltage signal conditioning; 9, low-pressure cavity; 10, low-pressure piston; 11, low-pressure cavity magnet steel; 12, low-pressure cavity spring; 13, low-pressure cavity magneto sensor; 14, multicircuit switch; 15, A/D conversion; 16, single-chip microcomputer; 17, liquid crystal display.
Embodiment
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is further described.
As shown in Figure 1, of the present inventionly comprise Venturi tube 1 from Mageneto-sensitive type flow sensing system; High pressure chest 2; High pressure piston 3; High pressure chest magnet steel 4; High pressure chest spring 5; High pressure chest magneto sensor 6; High-voltage signal conditioning 7; Low-voltage signal conditioning 8; Low-pressure cavity 9; Low-pressure piston 10; Low-pressure cavity magnet steel 11; Low-pressure cavity spring 12; Low-pressure cavity magneto sensor 13; Multicircuit switch 14; A/D conversion 15; Single-chip microcomputer 16; Liquid crystal display 17.
Fluid flows through from Venturi tube 1, and when flow of liquid in the pipeline during through Venturi tube, the flow section shrinks, and flow velocity increases at the necked-down section place, and pressure reduces, and produces pressure reduction before and after making Venturi tube, again according to the pressure reduction calculated flow rate that records.The fluid of venturi straight length flows into high pressure chest 2, and the fluid of trunnion section flows into low-pressure cavity 9.High pressure piston 3 overcomes high pressure chest spring 5 under the promotion of hydrodynamic pressure acting force moves down; High pressure chest magnet steel 4 in high pressure piston 3 bottoms moves down thereupon; High pressure chest magnet steel 4 shortens with the relative distance of the high pressure chest magneto sensor 6 that is fixed on high pressure chest 2 bottoms; The current signal of high pressure chest magneto sensor 6 outputs becomes big, and is input to high-voltage signal conditioning 7.
Low-pressure piston 10 overcomes low-pressure cavity spring 12 under the promotion of hydrodynamic pressure acting force moves down; Low-pressure cavity magnet steel 11 in low-pressure piston 10 bottoms moves down thereupon; Low-pressure cavity magnet steel 11 shortens with the relative distance of the low-pressure cavity magneto sensor 13 that is fixed on low-pressure cavity 9 bottoms; The current signal of low-pressure cavity magneto sensor 13 outputs becomes big, and is input to low-voltage signal conditioning 8.
What should explain at last is: the above is merely the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a Mageneto-sensitive type flow sensing system comprises Venturi tube, high pressure chest, high pressure piston, low-pressure cavity, low-pressure piston, high pressure chest magnet steel, high pressure chest magneto sensor, high pressure chest spring, low-pressure cavity magnet steel, low-pressure cavity magneto sensor, low-pressure cavity spring, high-voltage signal conditioning, low-voltage signal conditioning, multicircuit switch, A/D conversion, single-chip microcomputer, liquid crystal display.
2. Mageneto-sensitive type flow sensing according to claim 1 system is characterized in that high pressure chest magnet steel and low-pressure cavity magnet steel are installed in the bottom of high pressure piston and low-pressure piston respectively.
3. Mageneto-sensitive type flow sensing according to claim 1 system is characterized in that, the high pressure chest magneto sensor with press the chamber magneto sensor to be installed in the bottom of high pressure chest and low-pressure cavity respectively.
4. Mageneto-sensitive type flow sensing according to claim 1 system is characterized in that high pressure chest is connected with the Venturi tube straight length, and low-pressure cavity is connected with Venturi tube trunnion section.
5. Mageneto-sensitive type flow sensing according to claim 1 system is characterized in that high pressure chest magnet steel and high pressure chest magneto sensor are provided with in opposite directions, and low-pressure cavity magnet steel and low-pressure cavity magneto sensor are provided with in opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102984308A CN102445241A (en) | 2010-10-05 | 2010-10-05 | Magnetic-sensing-type flow sensing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102984308A CN102445241A (en) | 2010-10-05 | 2010-10-05 | Magnetic-sensing-type flow sensing system |
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| CN102445241A true CN102445241A (en) | 2012-05-09 |
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| CN2010102984308A Pending CN102445241A (en) | 2010-10-05 | 2010-10-05 | Magnetic-sensing-type flow sensing system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2789732Y (en) * | 2004-12-08 | 2006-06-21 | 常州市汇丰船舶附件制造有限公司 | Portable intelligent digital display micro-flowmeter |
| CN2886531Y (en) * | 2006-04-12 | 2007-04-04 | 苏文彪 | Fluid pressure sensing device |
| CN101017106A (en) * | 2007-02-14 | 2007-08-15 | 大连亨利测控仪表工程有限公司 | Vencore flowmeter |
| CN101021450A (en) * | 2007-03-26 | 2007-08-22 | 应城市新世纪摩托车配件有限责任公司 | Internal combustion engine negative pressure sensor |
| CN201034643Y (en) * | 2007-02-02 | 2008-03-12 | 刘志壮 | Venturi type differential pressure liquid flowmeter |
| CN201378089Y (en) * | 2009-04-17 | 2010-01-06 | 蒋伟荣 | Vehicular electronic pressure sensor |
-
2010
- 2010-10-05 CN CN2010102984308A patent/CN102445241A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2789732Y (en) * | 2004-12-08 | 2006-06-21 | 常州市汇丰船舶附件制造有限公司 | Portable intelligent digital display micro-flowmeter |
| CN2886531Y (en) * | 2006-04-12 | 2007-04-04 | 苏文彪 | Fluid pressure sensing device |
| CN201034643Y (en) * | 2007-02-02 | 2008-03-12 | 刘志壮 | Venturi type differential pressure liquid flowmeter |
| CN101017106A (en) * | 2007-02-14 | 2007-08-15 | 大连亨利测控仪表工程有限公司 | Vencore flowmeter |
| CN101021450A (en) * | 2007-03-26 | 2007-08-22 | 应城市新世纪摩托车配件有限责任公司 | Internal combustion engine negative pressure sensor |
| CN201378089Y (en) * | 2009-04-17 | 2010-01-06 | 蒋伟荣 | Vehicular electronic pressure sensor |
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Application publication date: 20120509 |