CN2636206Y - Level meter capable of precisely and reliably measuring float force - Google Patents
Level meter capable of precisely and reliably measuring float force Download PDFInfo
- Publication number
- CN2636206Y CN2636206Y CN 03207191 CN03207191U CN2636206Y CN 2636206 Y CN2636206 Y CN 2636206Y CN 03207191 CN03207191 CN 03207191 CN 03207191 U CN03207191 U CN 03207191U CN 2636206 Y CN2636206 Y CN 2636206Y
- Authority
- CN
- China
- Prior art keywords
- linear displacement
- liquid level
- displacement transducer
- level gauge
- float
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Level Indicators Using A Float (AREA)
Abstract
The utility model discloses a liquid level meter, which comprises a floater, a hanger, a wheel hub, a motor and a force sensor. Wherein, the force sensor is a linear displacement sensor, which is provided with a fixed part and a movable part. The liquid level meter also comprises a cantilever type plate spring, one end of the cantilever type plate spring is a fixed end and the other end is a floating end; the movable part of the linear displacement sensor is connected with the floating end of the plate spring and the motor is connected with the plate spring via a connecting piece. The force structure of the liquid level meter is connected and used reliably and can realize highly accurate flotage measurement.
Description
Technical field
The utility model relates to level gauging instrument technical field, be specifically related to a kind of can be accurately and the liquid level gauge of reliable measurements buoyancy.
Background technology
Liquid level gauge is widely used in the storing and transporting system of industries such as oil, chemical industry, food.In various liquid level gauges, the most frequently used is the force balance type liquid level gauge.
The force balance type liquid level gauge generally is made up of float, steel wire, wheel hub, motor, force transducer etc. and corresponding electronic circuit.Its principle is that float, steel wire, wheel hub, motor and force transducer etc. are formed a dynamic balance rotation system, and float can move up and down under the drive of motor, and the moment that float gravity produces reacts on the force transducer.Because the buoyancy difference of float under the different densities medium, also different to the reacting force that force transducer produces, so,, can determine that the float position is in air, on liquid level (liquid level position) or interface (interface between liquid) by measuring the size of reacting force.Therefore, accurately the prerequisite of measuring liquid level is the accurately variation of perception buoyancy of force transducer.
For accurately perception buoyancy variation, generally require force cell precision height, reliability height, and stable performance.With regard to existing liquid level gauge, the following structure of the general employing of used usually force transducer is about to foil gauge (strain resistor) and is fixed on the elastic body with adhesive means, forms force transducer.The force transducer of this structure is in long-term use, because the athletic meeting of motor produces jerk to it, so frequent vibrations cause foil gauge to come off from elastic body easily, perhaps, owing to the bonded section hardening function that follows the string, thereby cause force sensor measuring inaccurate even lost efficacy.Being useful on the force transducer on the servo liquid meter abroad, is to adopt exclusive technology, and structure is very complicated, is difficult to make.
Summary of the invention
Technical problem underlying to be solved in the utility model is, a kind of new liquid level gauge is provided, its force transducer use reliable and precision higher, and simple in structure, thereby high-acruracy survey that can realizable force.
For solving above-mentioned technical problem underlying, the utility model provides a kind of new liquid level gauge, it comprises float, suspender, wheel hub, motor and force transducer, wherein said force transducer is a Linear displacement transducer, and it has a fixed part and a moving part, and this liquid level gauge also comprises a cantilever, the one end is a stiff end, the other end is a floating end, and the moving part of described Linear displacement transducer is connected with the floating end of described leaf spring, and motor is connected with leaf spring by web member.
Wherein, described web member comprises a connecting link and a connecting line, and connecting link one end is fixed on the motor, and the other end is connected with connecting line, and the other end of connecting line is connected with leaf spring.
Wherein, described Linear displacement transducer is a condenser type Linear displacement transducer, and described fixed part is the quiet pole piece of capacitor, and described moving part is the moving pole piece of capacitor.
Wherein, described Linear displacement transducer is the electric vortex type Linear displacement transducer, and described fixed part is a coil, and described moving part is a metal vortex board.
Wherein, described Linear displacement transducer is a difference induction formula Linear displacement transducer, and described fixed part is the coil of inductor, and described moving part is the magnetic conductor of inductor.
Adopt such scheme, the utlity model has following beneficial effect:
One, because this liquid level gauge has adopted web member and the fixing leaf spring of an end, and sensor is fixed in the floating end of leaf spring, so this dynamometry structure connection and use are very reliable, the problem that does not exist foil gauge to come off.
Two, this liquid level gauge does not exist bonded section and elastomeric ageing hardening problem, and its measurement structure is reliable and stable.
Three, this liquid level gauge utilizes structures such as leaf spring, dexterously Linear displacement transducer is introduced in the perception and measurement to buoyancy, because the sensing accuracy of Linear displacement transducer is than original sensor height, so this liquid level gauge can realize high-precision buoyancy and measure, and and then improve the precision of level gauging.
Description of drawings
Below in conjunction with accompanying drawing, describe embodiment of the present utility model in detail.
Fig. 1 is the structural representation of the utility model first embodiment, and wherein said sensor is the condenser type Linear displacement transducer;
Fig. 2 is the structural representation of the utility model second embodiment, and wherein said sensor is the electric vortex type Linear displacement transducer;
Fig. 3 is the structural representation of the utility model the 3rd embodiment, and wherein said sensor is a difference induction formula Linear displacement transducer.
Piece number explanation among the figure:
1-float; 2-steel band; 3-perforation; 4-optoelectronic switch; 5-wheel hub; 6-magnetic clutch discs; 7-stepper motor; 8-axle; 9-support; 10-leaf spring; 11-moving pole piece; 12-quiet pole piece; 13-pull bar; 14-backguy; 15-metal vortex board; 16-coil; 17-iron-core workpiece; 18-coil.
Embodiment
Referring to Fig. 1, show first embodiment of the present utility model.
This liquid level gauge comprises a wheel hub 5, one magnetic clutch discs 6, and a stepper motor 7, and wheel hub 5 is installed together with magnetic clutch discs 6, and stepper motor 7 is connected with magnetic clutch discs 6 by axle 8.
The hub end of this liquid level gauge is provided with the liquid level information collecting device, and the stepper motor end is provided with the equilibrant sensing apparatus.The utility model is the innovation and creation that the equilibrant sensing apparatus of liquid level gauge is done.
First talk about the hub end of this liquid level gauge.Be wound with a steel band 2 on the wheel hub 5, steel band 2 lower ends are connected with float 1.Longitudinally equidistantly be provided with row's perforation 3 on the steel band 2, steel band 2 next doors are provided with an optoelectronic switch 4.Upper and lower when mobile with float 1 when steel band 2, the perforation 3 on it can just in time be passed through from the relevant position of optoelectronic switch 4, thereby optoelectronic switch 4 can perceive this perforation 3.This has the steel band 2 and the optoelectronic switch 4 common liquid level information collecting devices that constitute liquid level gauge described in the utility model of perforation 3.Described perforation 3 also can be to be arranged on the steel band in the Else Rule mode, the photoelectricity collector reads corresponding with it different perforation 3, represents that then float is positioned at the position of a certain height, like this, by the coded message of the perforation on the steel band 3, just can know the position of float.
Now, the stepper motor end of this liquid level gauge again.The right-hand member of stepper motor 7 has a pull bar 13, pull bar 13 the other end be connected with a leaf spring 10 by a backguy 14.The left end of leaf spring 10 is fixed in a support 9, and its right-hand member links to each other with a Linear displacement transducer.In the present embodiment, what described Linear displacement transducer specifically adopted is a kind of condenser type Linear displacement transducer, and it has a moving pole piece 11 and a quiet pole piece 12.Wherein moving pole piece 11 is fixed in the right-hand member of leaf spring 10.Because float 1, steel band 2, wheel hub 5, magnetic clutch discs 6, axle 8, stepper motor 7, pull bar 13, backguy 14 and leaf spring 10 constitute a dynamic balance system, when so float 1 relative liquid level distance changes, its suffered buoyancy also changes, the variation of this buoyancy will be reflected to leaf spring 10, and then the distance between pole piece 11 and the quiet pole piece 12 is changed, thereby this condenser type Linear displacement transducer can perceive this variation.Because the variation and the float 1 suffered buoyancy of the electric signal of the condenser type Linear displacement transducer perception that is caused by variable in distance between the dynamic and static pole piece 11,12 have fixing corresponding relation, so also can accurately measure the suffered buoyancy of float by this device.
Referring to Fig. 2, show the utility model second embodiment, for for simplicity, only show axle 8 and later part thereof.Wherein, different with first embodiment is, described Linear displacement transducer is the electric vortex type Linear displacement transducer, and it comprises a metal vortex board 15 and a coil 16.Described metal vortex board 15 is a moving part, is fixed in the rear end of stepper motor 7, and described coil 16 is a fixed part.When the suffered buoyancy of float changes, this variation will be reflected to leaf spring 10, and then the distance between metal vortex board 15 and the coil 16 is changed, and at metal vortex board 15 surface generation current vortexs, the eddy current magnetism of this current vortex will act on coil 16, thereby this electric vortex type Linear displacement transducer can perceive this variable in distance.Because the variation and the float 1 suffered buoyancy of the electric signal of the electric vortex type Linear displacement transducer perception that is caused by the variation of distance between metal vortex board 15 and the coil 16 have fixing corresponding relation, so can accurately measure float 1 suffered buoyancy by this device.
Referring to Fig. 3, show the utility model the 3rd embodiment, for for simplicity, also only show axle 8 and later part thereof.Wherein, different with previous embodiment is, described Linear displacement transducer is a difference induction formula Linear displacement transducer, it only shows an iron-core workpiece 17 and a coil 18, iron-core workpiece 17 is arranged in coil 18 as magnetic conductor, and as moving part, be fixed in the rear end of stepper motor 7,18 of coils are fixed part.When the suffered buoyancy of float changes, this variation will be reflected to leaf spring 10, and then the distance between iron-core workpiece 17 and the coil 18 is changed.At this moment, this difference induction formula Linear displacement transducer can perceive this variable in distance by coil 18.Because the variation and the float 1 suffered buoyancy of the electric signal of this difference induction formula Linear displacement transducer perception that is caused by the variation of distance between iron-core workpiece 17 and the coil 18 have fixing corresponding relation, so can accurately measure float 1 suffered buoyancy by this device.
Describe the course of work of this liquid level gauge below in detail.
Stepper motor 7 rotates, and drives 6 rotations of magnetic clutch discs by axle 8, and magnetic clutch discs 6 and then drive wheel hub 5 rotate.When wheel hub 5 rotated, steel band 2 was on wheel hub 5 or reel or unclamp, thereby drove float 1 upper and lower motion.At this moment, optoelectronic switch 4 can read the position at float 1 place by the perforation on the steel band 23.Float 1 is subjected to the acting in conjunction of gravity and buoyancy, will produce a moment to described dynamic balance system, and this moment will act on the leaf spring 10.According to Archimedes's the law of buoyancy, the moment difference that float 1 produces when reaching in the different densities liquid in air, also just different to the acting force of leaf spring 10, the distance meeting between the moving part of linear transducer (moving pole piece 11, metal vortex board 15 or iron-core workpiece 17) and the fixed part (quiet pole piece 12, coil 16 or coil 18) changes with the different of size of float 1 suffered buoyancy.To reach the effect of accurate measurement buoyancy by the variation of measuring this distance.Like this,, in other words,, will know that float 1 is to be arranged in air according to the variation of the electric signal of Linear displacement transducer perception by measurement result to this equilibrant, on the liquid level, or on the interface between liquid.At this moment, the position of the perforation 3 by described optoelectronic switch 4 perception can obtain accurate liquid level or interface.
Embodiment only is explanation the utility model, but not to restriction of the present utility model.All in the scope that does not break away from the utility model principle to the utility model do various modifications and accommodation, all within protection domain of the present utility model.
Claims (5)
1. liquid level gauge, comprise float, suspender, wheel hub, motor and force transducer, it is characterized in that, described force transducer is a Linear displacement transducer, and it has a fixed part and a moving part, and this liquid level gauge also comprises a cantilever, the one end is a stiff end, the other end is a floating end, and the moving part of described Linear displacement transducer is connected with the floating end of described leaf spring, and motor is connected with leaf spring by web member.
2, liquid level gauge according to claim 1 is characterized in that, described web member comprises a connecting link and a connecting line, and connecting link one end is fixed on motor or its support, and the other end is connected with connecting line, and the other end of connecting line is connected with leaf spring.
3, liquid level gauge according to claim 1 is characterized in that, described Linear displacement transducer is a condenser type Linear displacement transducer, and described fixed part is the quiet pole piece of capacitor, and described moving part is the moving pole piece of capacitor.
4, liquid level gauge according to claim 1 is characterized in that, described Linear displacement transducer is the electric vortex type Linear displacement transducer, and described fixed part is a coil, and described moving part is a metal vortex board.
5, liquid level gauge according to claim 1 is characterized in that, described Linear displacement transducer is a difference induction formula Linear displacement transducer, and described fixed part is the coil of inductor, and described moving part is the magnetic conductor of inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03207191 CN2636206Y (en) | 2003-08-07 | 2003-08-07 | Level meter capable of precisely and reliably measuring float force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03207191 CN2636206Y (en) | 2003-08-07 | 2003-08-07 | Level meter capable of precisely and reliably measuring float force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2636206Y true CN2636206Y (en) | 2004-08-25 |
Family
ID=34288327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03207191 Expired - Lifetime CN2636206Y (en) | 2003-08-07 | 2003-08-07 | Level meter capable of precisely and reliably measuring float force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2636206Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010015132A1 (en) * | 2008-08-06 | 2010-02-11 | Fan Mingjun | Servo liquid level meter |
| CN114812735A (en) * | 2022-04-11 | 2022-07-29 | 扬州市检验检测中心 | Multifunctional liquid level meter |
-
2003
- 2003-08-07 CN CN 03207191 patent/CN2636206Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010015132A1 (en) * | 2008-08-06 | 2010-02-11 | Fan Mingjun | Servo liquid level meter |
| CN114812735A (en) * | 2022-04-11 | 2022-07-29 | 扬州市检验检测中心 | Multifunctional liquid level meter |
| CN114812735B (en) * | 2022-04-11 | 2023-01-20 | 扬州市检验检测中心 | Multifunctional liquid level meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1837748B (en) | Contact-type displacement measuring apparatus | |
| US5027657A (en) | Acceleration sensor with cantilevered bending beam | |
| CN201787917U (en) | High-accuracy magnetic displacement transducer | |
| EP1612920A2 (en) | Position detecting device of linear motor | |
| CN101044375A (en) | Dial indicator system | |
| CN110281036B (en) | Double-measurement single-drive rigid-flexible coupling motion platform | |
| CN1677048A (en) | Scale | |
| CN1445557A (en) | Fluxgate sensor integrated in printed circuit board and manufacturing method thereof | |
| WO2005119179A1 (en) | Magnetic displacement detector | |
| CN109373886B (en) | Detection device based on dimensional morphology changes | |
| CN2636206Y (en) | Level meter capable of precisely and reliably measuring float force | |
| US20040164727A1 (en) | Single magnet linear position sensor | |
| US7246850B2 (en) | Seat weight sensor | |
| CN2636207Y (en) | Servo type level meter | |
| CN1811333A (en) | Coaxiality measuring instrument | |
| CN218059821U (en) | Highway quality detection device | |
| CN1300589C (en) | Speed tester for magnetic suspension vehicle | |
| CN214951096U (en) | Linear displacement experiment table convenient for sensor disassembly and assembly | |
| CN208399786U (en) | A kind of zoom lens controlled using voice coil motor | |
| CN2716815Y (en) | Capacitor grid type nilometer | |
| CN1621776A (en) | New pattern displacement gauge | |
| CN2663976Y (en) | Integrated guide rail type mechanical electronic resiliometer | |
| CN201306995Y (en) | Robot joint position sensor | |
| CN2665691Y (en) | Hall type force transducer | |
| CN2911616Y (en) | Optical-magnetic positioning level gage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130807 Granted publication date: 20040825 |