CN109297548A - A kind of magnetic flow meters and measurement method - Google Patents
A kind of magnetic flow meters and measurement method Download PDFInfo
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- CN109297548A CN109297548A CN201811150927.8A CN201811150927A CN109297548A CN 109297548 A CN109297548 A CN 109297548A CN 201811150927 A CN201811150927 A CN 201811150927A CN 109297548 A CN109297548 A CN 109297548A
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- 238000000691 measurement method Methods 0.000 title claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 230000003068 static effect Effects 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims description 19
- 239000004973 liquid crystal related substance Substances 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000002277 temperature effect Effects 0.000 claims description 4
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 52
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of magnetic flow meters and measurement methods, including ontology, it is characterized in that: the body interior front end is fixedly connected with centrum, the body interior is fixedly connected with fore-stock and after-poppet, front slide axle sleeve is fixedly connected in the fore-stock, one end of rear sliding shaft sleeve is fixedly connected in the after-poppet, static magnet is fixedly connected between the after-poppet and the rear sliding shaft sleeve, annulus Fixing shrink ring is on circular shaft, annulus outer ring ring set fixes moving magnet, the front end fitting of the circular shaft is fixedly connected with the center of pushing plate across the front slide axle sleeve, the rear end fitting of the circular shaft is across the static magnet and the rear sliding shaft sleeve, supporting protection body is fixedly connected on the upside of the ontology.The present invention relates to a kind of flowmeter, especially a kind of magnetic flow meters.The present invention simple, anti-interference detection that is strong, practical, at low cost, can be widely used for various gases, liquid in instrument industry with structure.
Description
Technical field
The present invention relates to a kind of flowmeter, especially a kind of magnetic flow meters and measurement method.
Background technique
The flowmeter that present flow measuring and controlling uses, measurement gas is mainly shafting flowmeter, and measurement liquid is mainly ultrasound
Wave and electromagnetic flowmeter can measure the flowmeter of gas and liquid simultaneously, be substantially differential pressure flowmeter, differential pressure flowmeter
Measurement range very little, and the pressure loss is larger, at runtime between consume a large amount of energy, be unfavorable for energy conservation.Flux of vortex street
Meter is also capable of measuring gas and fluid flow, but vibration is very big on the influence of the measurement accuracy of vortex-shedding meter, does not have both at home and abroad now
A kind of vortex-shedding meter of real antivibration.In conclusion now flow circle do not have it is a kind of can have measurement liquid, gas, and
Crushing is small, and measurement range is wide, and to insensitive flowmeter is vibrated, this is in place of the deficiencies in the prior art.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of magnetic flow meters and measurement method, be conducive to measure liquid or
Person's gas flow.
The present invention adopts the following technical scheme that realization goal of the invention:
A kind of magnetic flow meters, including ontology (1), it is characterized in that: the ontology (1) interior forward end is fixedly connected with centrum
(6), it is fixedly connected with fore-stock (7) and after-poppet (11) inside the ontology (1), is fixedly connected in the fore-stock (7) advancing slip
Moving axis set (8), is fixedly connected with one end of rear sliding shaft sleeve (12) in the after-poppet, the after-poppet (11) and it is described after sliding
It is fixedly connected between axle sleeve (12) static magnet (10), annulus (5b) Fixing shrink ring is on circular shaft (5a), annulus (5b) outer ring
Ring set is fixed moving magnet (9), and the front end of the circular shaft (5a), which is bonded, is fixedly connected with pushing plate across the front slide axle sleeve (8)
(5) center, the circular shaft (5a) rear end fitting across the static magnet (10) and it is described afterwards sliding shaft sleeve (12), described
It being fixedly connected supporting protection body (15) on the upside of body (1), plate rear portion is fixedly connected with pressure sensor (2) on the upside of the ontology (1),
Protection sleeve pipe (3) is secured across plate center on the upside of the ontology (1), and linear Hall biography is provided in the protection sleeve pipe (3)
Sensor (16), PT100 thermal resistance (4) are secured across plate front on the upside of the ontology (1).
It is further limited as to the technical program, the pressure sensor (2), the protection sleeve pipe (3) and described
PT100 thermal resistance (4) setting is fixedly connected with watchcase on the upside of the supporting protection body (15) in the supporting protection body (15)
(13), it is fixedly connected control panel (18) in the watchcase (13), is fixedly connected with liquid crystal display on front side of the control panel (18)
(14), it is fixedly connected single-chip microcontroller (19) on rear side of the control panel (18), battery (20) is installed in the watchcase (13).
It is further limited as to the technical program, the front slide axle sleeve (8) and described rear sliding shaft sleeve (12) material
Material is polytetrafluoroethylene (PTFE), and the battery (20) is lithium metal battery.
It is further limited as to the technical program, pushing plate (5) front end and the centrum (6) most narrow place are flat
Together.
It is further limited as to the technical program, protection sleeve pipe (3) lower end is located at the front slide axle sleeve (8)
Rear side upper end.
It is further limited as to the technical program, the moving magnet (9) and the static magnet (10) N are extremely opposite.
It is further limited as to the technical program, the pressure sensor (2), the linear hall sensor (16)
And the PT100 thermal resistance (4) is all connected with the single-chip microcontroller (19), the single-chip microcontroller (19) is also connected with key circuit and liquid crystal
Show device (14).
A kind of magnetic flow meters measurement method, it is characterized in that: including the following steps:
(1) ontology (1) is installed in pipeline, by pushing plate (5) face liquid flow direction or gas flow direction
It installs ontology (1), liquid liquid or gas push pushing plate (5) and liquid or gas when perhaps gas passes through ontology (1)
Equidirectional movement, pushing plate (5) drive circular shaft (5a) along fore-stock (7), front slide axle sleeve (8), rear sliding shaft sleeve (12) and after
Bracket (11) is mobile, and circular shaft (5a) drives moving magnet (9) mobile, moving magnet (9) close to static magnet (10), moving magnet (9) with it is quiet
Distance becomes smaller between magnet (10), and magnetic induction intensity between the two becomes larger, and linear hall sensor (16) experiences magnetic field strength change
Change, magnetic field variation signal is sent to single-chip microcontroller (19), single-chip microcontroller (19) calculates moving magnet (9) shifting according to the variation in magnetic field
The information of calculating is transmitted to liquid crystal display (14) to calculate the fluid flow for flowing through magnetic flow meters by dynamic distance
On；
(2) if gas flows through ontology (1), the volume of gas is larger by pressure and temperature effect, the shell in ontology (1)
The pressure sensor (2) and PT100 thermal resistance (4) installed on body, the pressure signal and temperature signal that will test are sent to monolithic
Machine operation carries out pressure, temperature-compensating to the volume of gas, single-chip microcontroller (19) based on the received linear hall sensor (16),
Pressure sensor (2) and the information of PT100 thermal resistance (4) acquisition calculate the gas flow under standard condition, by the letter of calculating
Breath is transmitted on liquid crystal display (14).
It is further limited as to the technical program, the step (1) calculates the process of fluid flow are as follows:
For liquid, pass through the available flow rate of liquid V of calibration experiment data1With linear hall sensor measurement
Magnetic field strength H1Changing rule:
K1- by the calculated constant of experimental data
Thus fluid flow Q is calculated1:
D-ontology pipeline diameter
S-ontology pipeline cross-sectional area
The magnetic field strength H that linear hall sensor 16 will measure1It is sent to single-chip microcontroller 19, single-chip microcontroller 19 is according to formula
(2) liquid fluid flow is calculated.
It is further limited as to the technical program, the step (2) calculates gas flow process are as follows:
For gas, flow velocity V2With the magnetic field strength H of linear hall sensor measurement2Changing rule:
K2By the calculated constant of experimental data under-standard state；
Thus gas flow q under standard state is calculated:
Empirical equation is compensated according to gas flow:
q1- gas actual volume flow
Q-gas standard volume flow
p1- gas actual pressure, kpa
P-gas standard pressure, kpa, the gas pressure at 20 DEG C of temperature；
T1- gas actual temperature, DEG C
T-gas standard temperature, 20 DEG C
Gas actual pressure p1It is measured and is obtained by pressure sensor 2, gas actual temperature T1It is obtained by the measurement of PT100 thermal resistance 4
?.
Obtain ontology pipeline actual flow q1:
The magnetic field strength H that linear hall sensor (16) will measure2It is sent to single-chip microcontroller (19), pressure sensor (2)
With PT100 thermal resistance (4), the pressure signal p that will test1With temperature signal T1It is sent to single-chip microcontroller (19), single-chip microcontroller (19) basis
Formula (7) calculates gas flow.
Compared with prior art, the advantages and positive effects of the present invention are: ontology is installed in pipeline, just by pushing plate
Ontology is installed in fluid flow direction, and when fluid flows through ontology, fluid forces pushing plate is mobile to fluid flowing opposite direction, is pushed
Strip is moved circular shaft and is moved along fore-stock, front slide axle sleeve, rear sliding shaft sleeve and after-poppet to fluid flowing opposite direction, and circular shaft drives
Moving magnet is mobile to fluid flowing opposite direction, and moving magnet distance between static magnet, moving magnet and static magnet becomes smaller, between the two
Magnetic induction intensity become larger, linear hall sensor experiences change of magnetic field strength, and magnetic field variation signal is sent to single-chip microcontroller, single
Piece machine calculates the mobile distance of moving magnet according to the variation in magnetic field, so that the fluid volume for flowing through magnetic flow meters is calculated,
Every terms of information is transmitted on liquid crystal display, when for measurement gas, the volume of gas is larger by pressure and temperature effect,
The pressure sensor and PT100 thermal resistance installed on the shell of ontology, the pressure signal and temperature signal that will test are sent to list
Piece machine operation carries out pressure, temperature-compensating to the volume of gas, and single-chip microcontroller calculates the gas volume under standard condition, will be each
Item information is transmitted on liquid crystal display.The present invention is simple, practical, at low cost with structure, can be widely used for instrument row
The detection of various gases or liquid in industry.
Detailed description of the invention
Fig. 1 is schematic perspective view one of the invention.
Fig. 2 is stereochemical structure cut-away diagram one of the invention.
Fig. 3 is sectional perspective structural schematic diagram one of the invention.
Fig. 4 is sectional perspective structural schematic diagram two of the invention.
Fig. 5 is sectional perspective structural schematic diagram three of the invention.
Fig. 6 is cross-sectional view of the invention.
Fig. 7 is left view of the invention.
Fig. 8 is monolithic mainboard CPU module schematic diagram of the invention.
Fig. 9 is pressure sensor module schematic diagram of the invention.
Figure 10 is linear hall sensor module principle figure of the invention.
Figure 11 is key circuit module principle figure of the invention.
In figure: 1, ontology, 2, pressure sensor, 3, protection sleeve pipe, 4, PT100 thermal resistance, 5, pushing plate, 5a, circular shaft,
5b, annulus, 6, centrum, 7, fore-stock, 8, front slide axle sleeve, 9, moving magnet, 10, static magnet, 11, after-poppet, 12, rear sliding axle
Set, 13, watchcase, 14, liquid crystal display, 15, supporting protection body, 16, linear hall sensor, 18, control panel, 19, single-chip microcontroller,
20, battery.
Specific embodiment
With reference to the accompanying drawing, the specific embodiment of the present invention is described in detail, it is to be understood that of the invention
Protection scope be not limited by the specific implementation.
As shown in Figure 1-Figure 11, the present invention includes ontology 1, and 1 interior forward end of ontology is fixedly connected with centrum 6, and described
It is fixedly connected with fore-stock 7 and after-poppet 11 inside body 1, front slide axle sleeve 8, the after-poppet are fixedly connected in the fore-stock 7
It is inside fixedly connected with one end of rear sliding shaft sleeve 12, is fixedly connected with static magnet between the after-poppet 11 and the rear sliding shaft sleeve 12
10, annulus 5b Fixing shrink ring is on circular shaft 5a, the fixed moving magnet 9 of annulus 5b outer ring ring set, the front end patch of the circular shaft 5a
The suitable excessively described front slide axle sleeve 8 is fixedly connected with the center of pushing plate 5, and the rear end of the circular shaft 5a is bonded across the static magnet
10 and it is described after sliding shaft sleeve 12, be fixedly connected with supporting protection body 15, the 1 upside plate rear portion of ontology on the upside of the ontology 1
It is fixedly connected with pressure sensor 2, protection sleeve pipe 3 is secured across the 1 upside plate center of ontology, sets in the protection sleeve pipe 3
It is equipped with as linear hall sensor 16, PT100 thermal resistance 4 is secured across the 1 upside plate front of ontology.
The pressure sensor 2, the protection sleeve pipe 3 and the PT100 thermal resistance 4 are arranged in the supporting protection body 15
It is interior, it is fixedly connected with watchcase 13 on the upside of the supporting protection body 15, control panel 18, the control panel are fixedly connected in the watchcase 13
18 front sides are fixedly connected with liquid crystal display 14, and single-chip microcontroller 19, installation in the watchcase 13 are fixedly connected on rear side of the control panel 18
There is battery 20.
The front slide axle sleeve 8 and rear 12 material of sliding shaft sleeve are polytetrafluoroethylene (PTFE) and have self-lubricating property, institute
Stating battery 20 is lithium metal battery.
5 front end of pushing plate is concordant with the most narrow place of the centrum 6.
3 lower end of protection sleeve pipe is located at the rear side upper end of the front slide axle sleeve 8.
The pressure sensor 2, the linear hall sensor 16 and the PT100 thermal resistance 4 are all connected with the monolithic
Machine 19, the single-chip microcontroller 19 are also connected with key circuit and liquid crystal display 14.
The 16 model HG106A of linear hall sensor.
The 2 model HK3023 of pressure sensor.
Battery 20 is the power supply of single-chip microcontroller 19.
Pin 1, pin 2, pin 60 and the pin 10 of the single-chip microcontroller 19 connect key circuit, and the single-chip microcontroller 19 draws
Foot 3 and pin 4 connect the PT100 thermal resistance 4, and the pin 5 of the single-chip microcontroller 19 connects the pressure sensor 2, the list
The pin 6 of piece machine 19 connects the linear hall sensor 16, the pin 12-39 of the single-chip microcontroller 19, pin 44, pin 45 and
The pin 48-55 connection liquid crystal display 14, the pin 64 of the single-chip microcontroller 19 connect the battery 20.
Workflow of the invention are as follows:
(1) ontology 1 is installed in pipeline, 5 face liquid flow direction of pushing plate or gas flow direction is installed
Ontology 1, liquid liquid or gas push pushing plate 5 and liquid or the equidirectional shifting of gas when perhaps gas passes through ontology 1
Dynamic, pushing plate 5 drives circular shaft 5a to move along fore-stock 7, front slide axle sleeve 8, rear sliding shaft sleeve 12 and after-poppet 11, circular shaft 5a band
Dynamic moving magnet 9 is mobile, and the distance between static magnet 10, moving magnet 9 and static magnet 10 of moving magnet 9 becomes smaller, magnetic strength between the two
Intensity is answered to become larger, linear hall sensor 16 experiences change of magnetic field strength, and magnetic field variation signal is sent to single-chip microcontroller 19, monolithic
Machine 19 calculates the mobile distance of moving magnet 9, to calculate the liquid flow for flowing through magnetic flow meters according to the variation in magnetic field
Amount, the information of calculating is transmitted on liquid crystal display 14；
(2) if gas flows through ontology 1, the volume of gas is larger by pressure and temperature effect, on the shell of ontology 1
The pressure sensor 2 and PT100 thermal resistance 4 of installation, the pressure signal and temperature signal that will test are sent to single-chip microcontroller operation, right
The volume of gas carries out pressure, temperature-compensating, single-chip microcontroller 19 linear hall sensor 16,2 and of pressure sensor based on the received
The information that PT100 thermal resistance 4 acquires calculates the gas flow under standard condition, and the information of calculating is transmitted to liquid crystal display
On 14.
The step (1) calculates the process of fluid flow are as follows:
For liquid, pass through the available flow rate of liquid V of calibration experiment data1With linear hall sensor measurement
Magnetic field strength H1Changing rule:
K1- by the calculated constant of experimental data
Thus fluid flow Q is calculated1:
D-ontology pipeline diameter
S-ontology pipeline cross-sectional area
The magnetic field strength H that linear hall sensor 16 will measure1It is sent to single-chip microcontroller 19, single-chip microcontroller 19 is according to formula
(2) liquid fluid flow is calculated.
The step (2) calculates gas flow process are as follows:
For gas, flow velocity V2With the magnetic field strength H of linear hall sensor measurement2Changing rule:
K2By the calculated constant of experimental data under-standard state；
Thus gas flow q under standard state is calculated:
Empirical equation is compensated according to gas flow:
q1- gas actual volume flow
Q-gas standard volume flow
p1- gas actual pressure, kpa
P-gas standard pressure, kpa, the gas pressure at 20 DEG C of temperature；
T1- gas actual temperature, DEG C
T-gas standard temperature, 20 DEG C
Gas actual pressure p1It is measured and is obtained by pressure sensor 2, gas actual temperature T1It is obtained by the measurement of PT100 thermal resistance 4
?.
Obtain ontology pipeline actual flow q1:
The magnetic field strength H that linear hall sensor 16 will measure2It is sent to single-chip microcontroller 19, pressure sensor 2 and PT100
Thermal resistance 4, the pressure signal p that will test1With temperature signal T1It is sent to single-chip microcontroller 19, single-chip microcontroller 19 calculates outlet according to formula 7
Body flow.
Disclosed above is only a specific embodiment of the invention, and still, the present invention is not limited to this, any ability
What the technical staff in domain can think variation should all fall into protection scope of the present invention.
Claims (10)
1. a kind of magnetic flow meters, including ontology (1), it is characterized in that: the ontology (1) interior forward end is fixedly connected with centrum (6),
It is fixedly connected with fore-stock (7) and after-poppet (11) inside the ontology (1), is fixedly connected with advancing slip moving axis in the fore-stock (7)
It covers (8), one end of rear sliding shaft sleeve (12), the after-poppet (11) and the rear sliding shaft sleeve is fixedly connected in the after-poppet
(12) it is fixedly connected between static magnet (10), annulus (5b) Fixing shrink ring is on circular shaft (5a), annulus (5b) outer ring ring set
Fixed moving magnet (9), the front end of the circular shaft (5a), which is bonded, is fixedly connected with pushing plate (5) across the front slide axle sleeve (8)
Center, the rear end fitting of the circular shaft (5a) is across the static magnet (10) and the rear sliding shaft sleeve (12), the ontology (1)
Upside is fixedly connected supporting protection body (15), and plate rear portion is fixedly connected pressure sensor (2) on the upside of the ontology (1), is protected
Casing (3) is secured across plate center on the upside of the ontology (1), is provided with linear hall sensor in the protection sleeve pipe (3)
(16), PT100 thermal resistance (4) is secured across plate front on the upside of the ontology (1).
2. magnetic flow meters according to claim 1, it is characterized in that: the pressure sensor (2), the protection sleeve pipe
(3) and the PT100 thermal resistance (4) setting is in the supporting protection body (15), fixed on the upside of the supporting protection body (15)
It connects watchcase (13), is fixedly connected control panel (18) in the watchcase (13), be fixedly connected with liquid crystal on front side of the control panel (18)
Display (14), control panel (18) rear side are fixedly connected single-chip microcontroller (19), are equipped with battery (20) in the watchcase (13).
3. magnetic flow meters according to claim 1, it is characterized in that: the front slide axle sleeve (8) and the rear sliding axle
Set (12) material is polytetrafluoroethylene (PTFE), and the battery (20) is lithium metal battery.
4. magnetic flow meters according to claim 1, it is characterized in that: the pushing plate (5) front end and the centrum (6)
Most narrow place is concordant.
5. magnetic flow meters according to claim 1, it is characterized in that: the protection sleeve pipe (3) lower end is positioned at described advancing slip
The rear side upper end of moving axis set (8).
6. magnetic flow meters according to claim 1, it is characterized in that: the moving magnet (9) and the static magnet (10) pole N
Relatively.
7. magnetic flow meters according to claim 1, it is characterized in that: the pressure sensor (2), the linear Hall pass
Sensor (16) and the PT100 thermal resistance (4) are all connected with the single-chip microcontroller (19), and the single-chip microcontroller (19) is also connected with key circuit
With liquid crystal display (14).
8. a kind of magnetic flow meters measurement method, it is characterized in that: including the following steps:
(1) ontology (1) is installed in pipeline, pushing plate (5) face liquid flow direction or gas flow direction is installed
Ontology (1), liquid liquid or gas push pushing plate (5) and liquid or gas Tongfang when perhaps gas passes through ontology (1)
To movement, pushing plate (5) drives circular shaft (5a) along fore-stock (7), front slide axle sleeve (8), rear sliding shaft sleeve (12) and after-poppet
(11) mobile, circular shaft (5a) drives moving magnet (9) mobile, and moving magnet (9) is close to static magnet (10), moving magnet (9) and static magnet
(10) distance becomes smaller between, and magnetic induction intensity between the two becomes larger, and linear hall sensor (16) experiences change of magnetic field strength, will
Magnetic field variation signal is sent to single-chip microcontroller (19), single-chip microcontroller (19) according to the variation in magnetic field, calculate moving magnet (9) it is mobile away from
From to calculate the fluid flow for flowing through magnetic flow meters, the information of calculating is transmitted on liquid crystal display (14)；
(2) if gas flows through ontology (1), the volume of gas is larger by pressure and temperature effect, on the shell of ontology (1)
The pressure sensor (2) and PT100 thermal resistance (4) of installation, the pressure signal and temperature signal that will test are sent to single-chip microcontroller fortune
It calculates, pressure, temperature-compensating is carried out to the volume of gas, single-chip microcontroller (19) linear hall sensor (16), pressure based on the received
Sensor (2) and the information of PT100 thermal resistance (4) acquisition calculate the gas flow under standard condition, and the information of calculating is passed
It is sent on liquid crystal display (14).
9. magnetic flow meters measurement method according to claim 8, it is characterized in that: the step (1) calculates fluid flow
Process are as follows:
For liquid, pass through the available flow rate of liquid V of calibration experiment data1With the magnetic field of linear hall sensor measurement
Intensity H1Changing rule:
K1- by the calculated constant of experimental data
Thus fluid flow Q is calculated1:
D-ontology pipeline diameter
S-ontology pipeline cross-sectional area
The magnetic field strength H that linear hall sensor 16 will measure1It is sent to single-chip microcontroller 19, single-chip microcontroller 19 is calculated according to formula (2)
Liquid fluid flow out.
10. magnetic flow meters measurement method according to claim 8, it is characterized in that: the step (2) calculates gas flow
Process are as follows:
For gas, flow velocity V2With the magnetic field strength H of linear hall sensor measurement2Changing rule:
K2By the calculated constant of experimental data under-standard state；
Thus gas flow q under standard state is calculated:
Empirical equation is compensated according to gas flow:
q1- gas actual volume flow
Q-gas standard volume flow
p1- gas actual pressure, kpa
P-gas standard pressure, kpa, the gas pressure at 20 DEG C of temperature；
T1- gas actual temperature, DEG C
T-gas standard temperature, 20 DEG C
Gas actual pressure p1It is measured and is obtained by pressure sensor 2, gas actual temperature T1It is measured and is obtained by PT100 thermal resistance 4.
Obtain ontology pipeline actual flow q1:
The magnetic field strength H that linear hall sensor (16) will measure2Be sent to single-chip microcontroller (19), pressure sensor (2) and
PT100 thermal resistance (4), the pressure signal p that will test1With temperature signal T1It is sent to single-chip microcontroller (19), single-chip microcontroller (19) is according to public affairs
Formula (7) calculates gas flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811150927.8A CN109297548A (en) | 2018-09-29 | 2018-09-29 | A kind of magnetic flow meters and measurement method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033488A (en) * | 2020-08-19 | 2020-12-04 | 重庆市山城燃气设备有限公司 | Natural gas meter with composite adjusting function and control method thereof |
| CN114920199A (en) * | 2021-12-30 | 2022-08-19 | 北京恒合信业技术股份有限公司 | Magnetic induction type flow sensor |
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| CN114920199B (en) * | 2021-12-30 | 2024-04-09 | 北京恒合信业技术股份有限公司 | Magnetic induction type flow sensor |
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