CN206945069U - A kind of mass flowmenter - Google Patents
A kind of mass flowmenter Download PDFInfo
- Publication number
- CN206945069U CN206945069U CN201720415178.1U CN201720415178U CN206945069U CN 206945069 U CN206945069 U CN 206945069U CN 201720415178 U CN201720415178 U CN 201720415178U CN 206945069 U CN206945069 U CN 206945069U
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- Prior art keywords
- sensor
- fluid
- inclination
- electronic signal
- mass flowmenter
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Abstract
The utility model discloses a kind of mass flowmenter, it can be combined with an inclination sensor, this inclination sensor can detect angle of inclination of at least a portion mass flowmenter relative to an at least reference axis, the angle of inclination detected according to this, point out to flow through the output signal of the mass flowmenter of the fluid mass flow rate of this sensor, it can be compensated, to make up any inaccuracy relevant with mass flowmenter is mounted orientation；These inaccuracy of compensation, including thermosyphon effect and fluid buoyancy effect are provided；It is inaccurate by compensating these, mass flowmenter can be used in any orientation and it is non-inertial environmentally, improve ease of use.
Description
Technical field
Flowmeter technology field is the utility model is related to, particularly relates to a kind of mass flowmenter.
Background technology
Mass flowmenter is early known in the art.Moreover, in the art, it is known that mass flowmenter
Orientation may influence its performance.For example, due to the phenomenon of so-called recycling effect, the accuracy of mass flowmenter may be from one
Individual another orientation that is directed to produces apparent change.Although have been attempt to setting with the different mass flowmenter of many kinds
Meter mode, to mitigate the influence of recycling, still, in general, the degree of its reduction is to depend on installing mass flowmenter
And it is used in the certain orientation for being designed as using.
Therefore, it is necessary to a kind of new mass flowmenter is designed, to solve above-mentioned technical problem.
Utility model content
For problem present in background technology, the purpose of this utility model is to provide a kind of mass flowmenter, Ke Yiyong
In in any orientation and it is non-inertial environmentally, improve ease of use.
What the technical solution of the utility model was realized in：A kind of mass flowmenter, there is fluid intake and fluid to go out
Mouth, including thermal mass flow sensor, inclination sensor, controller and neighbouring fluid flow path, the thermal mass spread
Sensor is used for the first electronic signal for providing the fluid mass flow rate flowed through between fluid intake and fluid issuing, thermal mass influenza
Utensil is answered to have the sensor inlet portion for being fluidly coupled to fluid intake, the sensor outlet portion for being fluidly coupled to fluid issuing
And place simultaneously fluid-type and be connected to the sensor measurement portion between sensor inlet portion and sensor outlet portion；The gradient
Sensor is used to provide at least one second electronic signal, is surveyed with providing sensor inlet portion, sensor outlet portion and sensor
At least one of amount portion relative to an at least reference axis angle of inclination；The controller be used for receive the first electronic signal with
Second electronic signal, according to the second electronic signal calculate correction factor, and by correction factor put in the first electronic signal with
The 3rd electronic signal is provided, the 3rd electronic signal is used for the matter for providing the fluid flowed through between fluid intake and fluid issuing
Flow velocity is measured, to compensate angle of inclination of at least one sensor portion relative to an at least reference axis；The neighbouring flow of fluid
Path, its have be placed on that sensor inlet portion is neighbouring and fluid-type be connected to the flow path entrance of fluid intake, and
Be placed on that sensor outlet portion is neighbouring and fluid-type be connected to the flow path outlet of fluid issuing.
In the above-mentioned technical solutions, further comprising the bypass pipe in the fluid flow path being disposed adjacent to.
In the above-mentioned technical solutions, the 3rd electronic signal is used to compensate thermal mass flow sensor and neighbouring fluid stream
Recycling between dynamic passage.
In the above-mentioned technical solutions, second electronic signal is used to provide sensor measurement portion relative at least one reference
The angle of inclination of axle, and the 3rd electronic signal is compensating between thermal mass flow sensor and neighbouring fluid flow path again
Circulation.
The utility model mass flowmenter, it can be combined with an inclination sensor, this inclination sensor can detect
At least a portion mass flowmenter is relative to the angle of inclination of an at least reference axis, the angle of inclination detected according to this, it is indicated that
The output signal of the mass flowmenter of the fluid mass flow rate of this sensor is flowed through, can be compensated, to make up any and matter
Measure the mounted orientation of flowmeter about inaccuracy；These inaccuracy of compensation are provided, including thermosyphon effect floats with fluid
Stress effect.It is inaccurate by compensating these, mass flowmenter can be used in any orientation and it is non-inertial environmentally, improve and use
Convenience.
Brief description of the drawings
Fig. 1 is the functional block diagram according to the utility model mass flowmenter；
Fig. 2 is compensation conventional process flow chart.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole realities
Apply example.Based on the embodiment in the utility model, those of ordinary skill in the art institute under the premise of creative work is not made
The every other embodiment obtained, belong to the scope of the utility model protection.
As shown in figure 1, a kind of mass flowmenter 300 described in the utility model, including one have fluid intake 320 with
The base 310 of fluid issuing 330, a thermal mass flow sensor 346, and some related electronic building bricks 360.
Thermal mass flow sensor 346 includes：One sensor inlet portion 346A, is connected to fluid intake its fluid-type
On 320, to accommodate a part for the treatment of fluid that fluid intake 320 is accommodated；One sensor outlet portion 346B, its fluid-type
It is connected to fluid issuing 330；And a sensor measurement portion 346C, be placed with around it two resistance coils or winding 346D,
346E, and this sensor measurement portion system fluid-type be connected to sensor inlet portion and sensor outlet portion.Mass flowmenter 300
A pressure can be included and decline bypass pipe (existing structure is not shown), the remainder of the fluid accommodated at fluid intake 320
Part flows through bypass pipe, is designed to for wherein mass flowmenter in the embodiment of high flow velocities.
Control electronic building brick 360 is installed on printed circuit board (PCB) 365, and this printed circuit board (PCB) can be attached to thermal mass stream
Sensor 346, base 310, or both on.Control electronic building brick 360 includes：Some form of controller 360A is (for example, micro-
Processor or digital signal processor)；Some internal memories 360B (for example, RAM, ROM, flash memory or its combination), these internal memory quilts
It is connected on controller, and being capable of the store controller number that can perform and/or use and/or data；And with thermal mass
Some electronic building bricks 360C that flow sensor 346 is combined.Control electronic building brick 360 can handle the institute of thermal mass flow sensor 346
The electronic signal that represent the rate of flow of fluid for flowing through thermal mass flow sensor is provided, and, there is provided a representative flows through quality stream
The output signal of the mass velocity of the fluid of gauge 300.
In general, thermal mass flow sensor 346 can be closed in a sensor housing 348, this sensor housing
It is attached on base 310, so as to which thermal mass flow sensor 346 is kept apart with surrounding environment.Sensor housing 348 can be with
It is at least local to be filled up by an isolation material (not shown), such as insulation foam or non-conductive fibre, in this way, being limited in sensor shell
The convection current total amount that may occur in body 348, furthermore, it is possible to which thermal mass flow sensor 346 is further kept apart with surrounding environment
Come.
Combined in control electronic building brick 360 and printed circuit board (PCB) 365 with thermal mass flow sensor 346 to be formed
In the case of the mass flowmenter of one entirety, one second housing (not shown) can be filled and be attached on base 310, to close heat
Mass flow sensor 346, sensor housing 348, control electronic building brick 360, and printed circuit board (PCB) 365, for such as
In the purposes such as EMI/RFI maskings, safety factor, aesthetic considerations.No matter such as control electronic building brick and printed circuit board (PCB) other zero
Whether part combines with thermal mass flow sensor 346, and the second housing may be used as by thermal mass flow sensor 346
Any other device of operation with that may influence mass flowmenter is further kept apart.
Mass flowmenter 300 also includes an inclination sensor 370, and it can provide a signal, to point out sensor
Inlet portion 346A, sensor outlet portion 346B, and at least one of sensor measurement portion 346C is relative to an at least reference axis
Angle of inclination.In most thermal mass flow sensor, sensor inlet portion 346A, sensor outlet portion 346B, and
Sensor measurement portion 346C is to be aligned in same level (for example, X-Y plane) in the manner shown in fig. 1 so that sensor inlet
Portion 346A and sensor outlet portion 346B is typically normal to be heated the sensor measurement portion 346C of (or cooling), and it is grown
Degree is substantially less than the sensor measurement portion.Because sensor measurement portion is usually the most long position of sensor, moreover, it is tilted
Angle tends to have most strong influence to recycling, so, it is preferred that inclination sensor 370 can provide sensor survey
Amount portion 346C relative at least angle of inclination of a reference axis reading.However, because the shape of flow-sensint unit is typically
, it is known that so, it should it is to be understood that this inclination sensor 370 can be alternately provided sensor inlet portion 346A, pass
The reading at the sensor export department 346B angles of inclination of either or both, if however, being shaped as flow-sensint unit is known
Words, the angle of inclination of sensor portion are used as to determine the angle of inclination of another sensor portion.
In the embodiment shown in fig. 1, when sensor measurement portion 346C typically system parallel to base 310 a segment length with
And during X-axis, inclination sensor 370 can point out relative at least X-axis angle of inclination (this point can also be discussed as,
Inclination sensor can point out rotation of the sensor measurement portion around Z axis).Preferably, however, in the embodiment shown in Fig. 1
In, inclination sensor can be pointed out relative to angle of inclination more than an axle, moreover, it is preferred that can point out to quality stream
The accuracy of gauge 300 has the angle of inclination of these axles of maximum effect.Inclination sensor 370 can point out that sensor is surveyed
Amount portion 346C relative to the angle of inclination of X-axis and Y-axis (or on the other hand, inclination sensor can point out sensor survey
Rotation of the amount portion respectively around Z axis and X-axis).
Although the angle of inclination of sensor measurement portion has significant influence for recycling, still there are others
Physical phenomenon may influence the accuracy of thermal mass flow sensorses, moreover, being on sensor inlet portion 346A, sensor outlet
Angle of inclination more than portion 346B, and one of sensor measurement portion 346C.One of which phenomenon, it is referred to herein as outer
Portion's effect, it has pointed out the mode or speed that sensor housing 348 diffuses to the heat (or cooling) of its ambient temperature, can
The fact that be able to can be changed according to the orientation of mass flowmenter.Another phenomenon, referred to herein as density effect or
Rho-g-h effects, it has pointed out sensor inlet portion and the different densities of the fluid in sensor outlet portion 346A, 346B,
And the combined result in sensor inlet portion and the angle of inclination in sensor outlet portion, it is likely to result in the buoyancy caused by temperature
The fact, this buoyancy can stop or help fluid to flow through sensor.By detecting the sensor of a part relative at least one ginseng
The angle of inclination of axle is examined, can be to determine some correction factors, these correction factors can make up due to recycling effect, outside
Portion's effect, density effect or the error caused by the effect that other depend on orientation in the flow velocity measured.Moreover,
These correction factors can also be applied on the quality stream signal that mass flowmenter is provided.
According to an embodiment, inclination sensor can provide sensor measurement portion 346C inclining relative to three normal axis
The reading of rake angle, two of which shafting perpendicular to sensor measurement portion longitudinal axis, and be left another axle then align this sensing
The longitudinal axis of device measurement portion.In the embodiment shown in fig. 1, these three normal axis correspond respectively to X, Y and Z axis, thus, tilt
Degree sensor can point out rotation of the sensor measurement portion around Z, X and Y-axis respectively.Although it is on recycling most significant influence
It is relevant (around the rotation of Z axis in Fig. 1) relative to the angle of inclination of X-axis with sensor measurement portion, still, relative to inclining for Y-axis
Rake angle (around the rotation of X-axis in Fig. 1, or, the orientation that sensor inlet portion is aligned with sensor outlet portion), it is general right
Still there is smaller but still measurable influence out in the accuracy of thermal mass flow sensorses, this point is due to above-mentioned density effect
Reason.
According to an embodiment of the invention, inclination sensor 370 can be any the one of many known inclination sensors
Kind, such as：Electronic mechanical inclination sensor, piezoelectric type inclination sensor, liquid tilt formula inclination sensor, optics
Or Magnetic Induction formula inclination sensor, heat or electric capacity MEMS formula inclination sensors.The mounting means of inclination sensor, makes
Must tilt effective axle to an as little as axle (preferably two axles) not parallel to sensor measurement portion 346C, moreover, it is preferred that hanging down
Directly in the longitudinal axis of sensor measurement portion.When using the situation for the inclination sensor that effective axle is tilted with three, it is preferred that
3rd tilts longitudinal axis of effective axle parallel to sensor measurement portion.
In the embodiment shown in fig. 1, inclination sensor 370 is attached on printed circuit board (PCB) 365, and printed circuit
Plate is attached on base 310 successively.Inclination sensor 370 can also be placed on other positions, as long as this is tilted
The orientation of the effective axle of inclination of sensor is spent, has well known corresponding relation with the orientation of thermal mass flow sensor 346.
Thus, for example, inclination sensor 370 can be attached to by dress base 310 or, dress is attached to any other position of flowmeter
On, and there is known corresponding relation with the orientation of sensor, consequently, it is possible to just can correctly confirm at least one of
Thermal mass flow sensor relative to an at least reference axis gradient.
Mass flowmenter 300 can include more than one temperature sensor 370A, 370B, and more than one pressure
Sensor 375, each sensor produce communication with controller 36A.In the embodiment shown in fig. 1, temperature sensor 370A
It is placed with and forms thermal communication with the entrance of mass flowmenter 320, it is thus possible to points out the processing stream flowed into mass flowmenter
The temperature of body.In the case of base 310 is made up of heat-conductings such as stainless steel, aluminium or brass, this temperature is typically to represent
Through the fluid temperature (F.T.) of mass flowmenter, but not comprising the fluid in thermal mass flow sensor 346 itself.When combination is to resistive conductor
During the understanding of heating (or cooling) total amount that circle or winding 346D, 346E are provided, for entering the processing in mass flowmenter
The understanding of fluid temperature (F.T.), it is more accurate that the density and/or stickiness of the fluid in the different parts of mass flowmenter can be provided
Judgement.
In addition to being placed with and forming one or more temperature sensor 370A of thermal communication with treatment fluid, quality stream
Gauge 300 can also include a temperature sensor 370B being placed in mass flowmenter, but not with flowing into place therein
Manage fluid and form thermal communication.For example, this temperature sensor 370B can also be placed on printed circuit board (PCB) 365 and close sensing
Device housing 348, in this way, measuring the temperature of the environment near it.The reading of environment temperature around sensor housing, can by with
To determine the error total amount caused by external effect.
For the mode that the inaccuracy illustrated depending on orientation is determined out, and the mode of compensation, institute may be provided
With the compensation conventional process for being used together the mass flowmenter with reference to shown in illustrating with Fig. 1 figure 2.
In step 410, the controller 360A controllers such as in Fig. 1, the gradient sensing of one or more can be inquired
Device, these sensors are able to confirm that out angle of inclination of the thermal mass flow sensor relative to an at least reference axis.It is to be understood that
This step is preferably after flowmeter is installed in the estimated position (that is, its operating position) used.Moreover, as first schemed
Described in 1, this at least reference axis is preferably comprised at least two orthogonal reference axis, moreover, being preferably comprised at least one
It is individual not parallel to sensor measurement portion 346C reference axis.In the embodiment shown in fig. 1, these at least two reference axis can be really
Recognize the degree in sensor measurement portion offset level direction and sensor inlet the portion direction signified with export department.When single
When inclination sensor is configured to correspond to each reference axis, controller can sequentially inquire each inclination sensor, so
And, it will be appreciated that obtain, single inclination sensor can also be used, to confirm the inclination angle relative to an at least reference axis
Degree.After one or more inclination sensors were inquired, this compensation usual proceeds to step 420.
At step 420, compensate it is usual determine one be used for recycle and external effect the combination correction factor, with more
Mend any inaccuracy caused by these effects and the orientation of sensor in quality stream output signal.
In step 430, compensation is usual determines a correction factor for being used for density effect or rho-g-h effects,
To make up due to appointing in quality stream output signal caused by sensor inlet portion and export department 346A, 346B orientation institute are main
How the inaccuracy based on density.
In step 440, the correction factor determined in step 420 and 430 is applied to the output of mass flowmenter
On signal, cause, the output quality stream signal that mass flowmenter is provided can make up the installation orientation institute for being attributed to flowmeter
It is inaccurate caused by caused any orientation.
The step 410 of the gradient of quality-determining flowmeter, it is only necessary to after flowmeter is installed in its operating position,
It is or i.e. executable after a new operating position is installed on.For example, made up in order to ensure the orientation of flowmeter,
After having been carried out any other startup program, when mass flowmenter is powered, can traffic meter gradient
Decision.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in
Protection domain within.
Claims (4)
1. a kind of mass flowmenter, there is fluid intake and fluid issuing, it is characterised in that：Including thermal mass flow sensor, incline
Tilt sensor, controller and neighbouring fluid flow path, the thermal mass flow sensor are used to provide fluid intake and stream
First electronic signal of the fluid mass flow rate flowed through between body outlet, thermal mass stream sensing apparatus are fluidly coupled to fluid
The sensor inlet portion of entrance, the sensor outlet portion for being fluidly coupled to fluid issuing and placement and fluid-type is connected to biography
Sensor measurement portion between sensor inlet portion and sensor outlet portion；The inclination sensor is used to provide at least one second
Electronic signal, to provide at least one of sensor inlet portion, sensor outlet portion and sensor measurement portion relative to extremely
The angle of inclination of a few reference axis；The controller is used to receive the first electronic signal and the second electronic signal, according to the second electricity
Subsignal calculates correction factor, and correction factor is put in the first electronic signal to provide the 3rd electronic signal, and described the
Three electronic signals are used for the mass velocity for providing the fluid flowed through between fluid intake and fluid issuing, to compensate at least one biography
Sensor portion relative to an at least reference axis angle of inclination；The neighbouring fluid flow path, it, which has, is placed on sensor
Inlet portion is neighbouring and fluid-type be connected to the flow path entrance of fluid intake, and be placed on sensor outlet portion it is neighbouring and
It is connected to the flow path outlet of fluid issuing fluid-type.
2. mass flowmenter according to claim 1, it is characterised in that：Further comprising the flow of fluid being disposed adjacent to
Bypass pipe in path.
3. mass flowmenter according to claim 1, it is characterised in that：3rd electronic signal is used to compensate thermal mass
Recycling between flow sensor and neighbouring fluid flowing passage.
4. mass flowmenter according to claim 1, it is characterised in that：Second electronic signal is used to provide sensor
Measurement portion relative to an at least reference axis angle of inclination, and the 3rd electronic signal to compensate thermal mass flow sensor with it is neighbouring
Fluid flow path between recycling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720415178.1U CN206945069U (en) | 2017-04-19 | 2017-04-19 | A kind of mass flowmenter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720415178.1U CN206945069U (en) | 2017-04-19 | 2017-04-19 | A kind of mass flowmenter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206945069U true CN206945069U (en) | 2018-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720415178.1U Expired - Fee Related CN206945069U (en) | 2017-04-19 | 2017-04-19 | A kind of mass flowmenter |
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| Country | Link |
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| CN (1) | CN206945069U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940449A (en) * | 2018-09-21 | 2020-03-31 | 罗斯蒙特公司 | Remote seal diaphragm system |
| CN112424572A (en) * | 2018-06-08 | 2021-02-26 | 伯金公司 | Pressure insensitive thermal flowmeter |
-
2017
- 2017-04-19 CN CN201720415178.1U patent/CN206945069U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112424572A (en) * | 2018-06-08 | 2021-02-26 | 伯金公司 | Pressure insensitive thermal flowmeter |
| CN110940449A (en) * | 2018-09-21 | 2020-03-31 | 罗斯蒙特公司 | Remote seal diaphragm system |
| CN110940449B (en) * | 2018-09-21 | 2021-12-21 | 罗斯蒙特公司 | Remote seal diaphragm system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180130 Termination date: 20200419 |
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| CF01 | Termination of patent right due to non-payment of annual fee |