CN103234603A - Floater mechanism and measurement method used for measuring liquid level of liquid pressure meter - Google Patents
Floater mechanism and measurement method used for measuring liquid level of liquid pressure meter Download PDFInfo
- Publication number
- CN103234603A CN103234603A CN2013100959080A CN201310095908A CN103234603A CN 103234603 A CN103234603 A CN 103234603A CN 2013100959080 A CN2013100959080 A CN 2013100959080A CN 201310095908 A CN201310095908 A CN 201310095908A CN 103234603 A CN103234603 A CN 103234603A
- Authority
- CN
- China
- Prior art keywords
- liquid level
- liquid
- container
- float
- floater
- 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.)
- Granted
Links
Images
Landscapes
- Level Indicators Using A Float (AREA)
Abstract
The invention relates to a liquid pressure meter and belongs to the field of detection. A floater mechanism used for measuring the liquid level of the liquid pressure meter is arranged on a conductive medium liquid level of the liquid pressure meter, and is characterized by comprising a floater and a floater stabilization mechanism, wherein the floater comprises a floater body and a T-shaped measurement head; the floater body adopts an aluminum alloy floater body; the T-shaped top end surface of the measurement head is a polytetrafluoro diffuse reflection plane; extended stabilization grooves are formed in the two ends of the floater body respectively; the stabilization grooves are sleeved in vertical columns of left and right stabilization brackets fixed in a container of the liquid pressure meter; the two stabilization brackets are vertically arranged between the upper and lower planes in the container; the floater body is symmetrically arranged by a central line; the measurement head is arranged on the symmetry axis of the central line; and the inner wall of the container adopts a Teflon coating. According to the liquid pressure meter, the floater mechanism is applied to the liquid level of the liquid pressure meter, so that the height value of the liquid level can be very accurately obtained in combination with a measurement device, and the accuracy and the stability are very good.
Description
Technical field
The present invention relates to liquid manometer, relate in particular to a kind of float mechanism for the measurement of liquid manometer liquid level position.
Background technology
Liquid manometer is that a kind of liquid-column height difference of utilizing is directly carried out tonometric instrument.Its biggest advantage is directly perceived, less pressure can be kept steady state (SS), but will realize that the maximum technological difficulties that pin-point accuracy is measured are that liquid level position is measured.Traditional measurement liquid level method roughly is divided into two kinds, a kind of is the position that engraves liquid level in the scale range estimation glass tube at glass tube, another kind method is to adjust liquid level and observe awl point and its inverted image in liquid level that is fixed in the container, make it to be about to collide, this moment, the position of awl point was exactly liquid level position.As shown in Figure 1, the most typical is exactly U-tube manometer, and accuracy of measurement is quite low.Method shown in the accompanying drawing 2 is more accurate relatively, and exemplary is exactly compensate-type micropressure meter, and the liquid level position when its shortcoming first is balance is fixed, and it two is to come the adjustment position with range estimation, is difficult to control automatically and digital communication.The somebody adopts ultrasound wave directly to carry out the liquid level position measurement at present except above two kinds of methods.Hyperacoustic feature is the frequency height, and wavelength is short, and the diffraction phenomenon is little, and good directionality, can become ray and direction propagation.Liquid level is the long-pending of ultrasonic propagation velocity and delivery time, Distance=VT.Measuring principle be when opening ultrasound wave trigger pulse count down to stop when receiving return signal the counting, see shown in the accompanying drawing 3.In order to make measurement more accurate, can demarcate some constants that ultrasound wave transmits with the crosswise fixed distance.Accuracy of measurement might reach the order of magnitude of a few percent millimeter.But, be the liquid manometer of water if adopt medium, corresponding a few tenths of Pa pressure.Measuring stability and accuracy are then unsatisfactory.
Summary of the invention
Technical matters to be solved by this invention provides a kind of float mechanism for the measurement of liquid manometer liquid level position, solves present liquid manometer liquid level position and measures the range estimation of employing human eye or other method, and degree of accuracy can't guarantee, the defective that consistance is very poor.
Technical scheme
A kind of float mechanism for the measurement of liquid manometer liquid level position, be arranged on the conductive medium liquid level of liquid manometer, it is characterized in that: comprise float and float stabilizing mechanism, described float comprises buoyancy aid and "T"-shaped measuring head, buoyancy aid adopts the aluminium alloy buoyancy aid, the "T"-shaped top end face of measuring head is polytetrafluoro diffuse reflection plane, the buoyancy aid two ends have the gutter that stretches out respectively, described gutter be enclosed within the container that is fixed on liquid manometer about on the vertical column of two center rests, described two center rests vertically are arranged on to be gone up between the lower plane in the described container, described buoyancy aid is symmetrical arranged with center line, "T"-shaped measuring head is arranged on this center line axis of symmetry, and described container inner wall adopts the Teflon coating.
Further, the two ends, the left and right sides of described buoyancy aid press close to be arranged on respectively in the container about two center rests.
Further, described buoyancy aid is downward cone.
Further, described container is airtight container.
Further, described container is provided with laser displacement gauge, cooperates the interior liquid level of described float mechanism's measuring vessel.
Beneficial effect
Float of the present invention mechanism is used on the liquid level of fluid pressure machine, cooperate laser displacement gauge or other measurement mechanism just can point-devicely obtain the height value of liquid level, and observe the variation of liquid level, improve greatly compared with present eyes direct-view degree of accuracy, even under minute-pressure changes, also can accurately test, unaffected, stability is very good.
Description of drawings
Fig. 1 is the synoptic diagram of a kind of measuring method of prior art.
Fig. 2 is the synoptic diagram of the another kind of measuring method of prior art.
Fig. 3 is ultrasonic measurement principle schematic in the prior art.
Fig. 4 is structural representation of the present invention.
Fig. 5 carries out the principle schematic of liquid level gauging for respective outer side edges laser displacement gauge of the present invention.
Wherein: 1-buoyancy aid, 2-measuring head, the "T"-shaped top end face of 3-measuring head, 4-gutter, 5-center rest, 6-pressure transmitting medium liquid level, 7-container, the eyeglass before the 8-semiconductor laser, 9-laser instrument, 10-collects eyeglass, 11-CCD array, 12-signal processor, 13-testee.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.
For solving the detection under the minute-pressure situation, newly designed a kind of float mechanism, float mechanism is arranged on the conductive medium liquid level 6 in the container 7 of liquid manometer, whole float mechanism comprises float and float stabilizing mechanism, described float comprises buoyancy aid 1 and "T"-shaped measuring head 2, buoyancy aid 1 adopts the aluminium alloy buoyancy aid, the "T"-shaped top end face 3 of measuring head is polytetrafluoro diffuse reflection plane, buoyancy aid 1 two ends have the gutter 4 that stretches out respectively, described gutter 4 be enclosed within the container 7 that is fixed on liquid manometer about on the vertical column of two center rests 4, described two center rests 4 vertically are arranged in the described container 7 and go up between the lower plane, center rest 4 can limit float and rotate and wave, referring to accompanying drawing 4.The laser displacement gauge of container 7 tops with the plane of reflection of laser beam directive diffuse reflection surface, carries out range observation according to the corresponding different reflection angle of different distances.Container 7 inwalls of this float mechanism adopt the Teflon coating, to reduce inner surface of container to the adhesion of medium, make adhesion less than the cohesion between fluid molecule like this, and liquid medium is difficult for producing wall cling phenomenon.
Merit attention, very consistent of the center of gravity that the development of this float mechanism must guarantee float and its center, not so float can tilt and produce friction at center rest 4 buoyant equilibrium is changed, therefore described buoyancy aid 1 is symmetrical arranged with center line, and "T"-shaped measuring head 2 is arranged on this center line axis of symmetry.
On described container 7, can be provided with laser displacement gauge, cooperate the interior liquid level of described float mechanism's measuring vessel.Laser displacement gauge adopts optical triangulation method measuring principle (seeing accompanying drawing 5) to measure, and just the monochromatic light that semiconductor laser 8 is penetrated focuses on testee 13 by the eyeglass 9 before the laser instrument.Reflected light is collected eyeglass 10 and collects, and projects on the ccd array 11; Signal processor 12 calculates light spot position on the ccd array 11 by trigonometric function and obtains distance apart from object.Signal testee 13 initial positions are to the instrumentation plan of shift position among the figure.If plane of departure generation deflection then must have influence on the accuracy of position measurement, so the floating state of float is very important.
In order to measure absolute pressure and vacuum, float mechanism must seal fully.Sealing mechanism divides three parts: the one, and the embedded toroidal rubber cushion sealing of loam cake, second is the pressure vacuum sealing of pressure interface, the 3rd is the logical light isolating seal of laser displacement gauge and this mechanism.
During actual measurement, the laser displacement gauge measured value D during with no pressure reduction
0Be zero-bit, the laser displacement gauge reading D when the pressurization back is measured
xBe a relative reading, actual liquid level position D:
D＝D
x-D
0-----------（1）
Consider the temperature variation in the measuring process, actual liquid level position also must carry out the temperature correction of Media density, and the Media density of establishing original state is ρ
0, the temperature funtion of Media density is ξ (t), then the Media density of duty is
Equal to arrange the weight of liquid according to Archimedes' principle buoyancy, equal the gravity of float according to statics balance principle buoyancy, then can derive actual liquid level position
In the formula: d is the external diameter of float; V
0Immerse the initial volume of medium for float.
Can calculate actual level change value by formula (2) and (3).
According to the prior art level of laser displacement gauge, its position measurement uncertainty can reach 7 μ (k=2), and measurement range is 10mm.
This programme has been developed the float mechanism in the movable container and fixed container in the high-precision liquid pressure gauge, and laser displacement gauge is arranged on container 7 tops, utilizes laser beam to carry out range observation to the plane of reflection of diffuse reflection surface.This float mechanism structure is simple, and modern design realizes high-precision measurement.It has not only enlarged measurement range but also improved uncertainty of measurement than original compensatory pressure meter, and measurement data directly is digital form, the pith that can be used as automatic measurement is introduced into the system of full-automatic micro pressure measuring, make the testing equipment practicality stronger, more be applicable to the requirement of actual micro-pressure measurement.
Claims (6)
1. one kind is used for the float mechanism that the liquid manometer liquid level position is measured, be arranged on the conductive medium liquid level of liquid manometer, it is characterized in that: comprise float and float stabilizing mechanism, described float comprises buoyancy aid and "T"-shaped measuring head, buoyancy aid adopts the aluminium alloy buoyancy aid, the "T"-shaped top end face of measuring head is polytetrafluoro diffuse reflection plane, the buoyancy aid two ends have the gutter that stretches out respectively, described gutter be enclosed within the container that is fixed on liquid manometer about on the vertical column of two center rests, described two center rests vertically are arranged on to be gone up between the lower plane in the described container, described buoyancy aid is symmetrical arranged with center line, "T"-shaped measuring head is arranged on this center line axis of symmetry, and described container inner wall adopts the Teflon coating.
2. float mechanism of measuring for the liquid manometer liquid level position as claimed in claim 1 is characterized in that: the two ends, the left and right sides of described buoyancy aid press close to be arranged on respectively in the container about two center rests.
3. float mechanism of measuring for the liquid manometer liquid level position as claimed in claim 1 or 2, it is characterized in that: described buoyancy aid is downward cone.
4. float mechanism of measuring for the liquid manometer liquid level position as claimed in claim 1 or 2, it is characterized in that: described container is airtight container.
5. float mechanism of measuring for the liquid manometer liquid level position as claimed in claim 1 or 2, it is characterized in that: described container is provided with laser displacement gauge, cooperates liquid level in the described float mechanism measuring vessel.
6. an application float as claimed in claim 1 mechanism carries out the method that the liquid manometer liquid level position is measured, it is characterized in that: in the liquid container of liquid manometer, be provided with described float mechanism, at described liquid container end face, be positioned at float mechanism top and be provided with laser displacement gauge, described laser displacement gauge adopts the optical triangulation method, polytetrafluoro diffuse reflection plane with described float mechanism is that testee carries out displacement measurement, and obtains the height and position of liquid level in conjunction with the calculation of parameter of conductive medium and float mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310095908.0A CN103234603B (en) | 2013-03-25 | 2013-03-25 | Floater mechanism and measurement method used for measuring liquid level of liquid pressure meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310095908.0A CN103234603B (en) | 2013-03-25 | 2013-03-25 | Floater mechanism and measurement method used for measuring liquid level of liquid pressure meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103234603A true CN103234603A (en) | 2013-08-07 |
| CN103234603B CN103234603B (en) | 2015-07-22 |
Family
ID=48882654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310095908.0A Expired - Fee Related CN103234603B (en) | 2013-03-25 | 2013-03-25 | Floater mechanism and measurement method used for measuring liquid level of liquid pressure meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103234603B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674164A (en) * | 2013-12-26 | 2014-03-26 | 武汉理工大学 | Weighing type detection object, device and method for detecting liquid level position |
| CN108594878A (en) * | 2018-04-22 | 2018-09-28 | 北京工业大学 | A kind of device accurately controlling shield model test excavation face supporting power |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4756076A (en) * | 1984-10-10 | 1988-07-12 | Tokheim Comporation | Method for making a resistive level sensor |
| CN101008581A (en) * | 2006-01-27 | 2007-08-01 | 李鑫钰 | Laser measurement liquid level meter |
| CN101074889A (en) * | 2007-06-14 | 2007-11-21 | 南京航空航天大学 | Float laser liquid-level measuring device |
| CN202793680U (en) * | 2012-06-19 | 2013-03-13 | 中国计量科学研究院 | Floater used for liquid pressure meter |
-
2013
- 2013-03-25 CN CN201310095908.0A patent/CN103234603B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4756076A (en) * | 1984-10-10 | 1988-07-12 | Tokheim Comporation | Method for making a resistive level sensor |
| CN101008581A (en) * | 2006-01-27 | 2007-08-01 | 李鑫钰 | Laser measurement liquid level meter |
| CN101074889A (en) * | 2007-06-14 | 2007-11-21 | 南京航空航天大学 | Float laser liquid-level measuring device |
| CN202793680U (en) * | 2012-06-19 | 2013-03-13 | 中国计量科学研究院 | Floater used for liquid pressure meter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674164A (en) * | 2013-12-26 | 2014-03-26 | 武汉理工大学 | Weighing type detection object, device and method for detecting liquid level position |
| CN108594878A (en) * | 2018-04-22 | 2018-09-28 | 北京工业大学 | A kind of device accurately controlling shield model test excavation face supporting power |
| CN108594878B (en) * | 2018-04-22 | 2021-06-25 | 北京工业大学 | Device for accurately controlling shield model test excavation face supporting force |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103234603B (en) | 2015-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103217252B (en) | Movable container type high-precision micro-pressure detection device | |
| CN104897243B (en) | Liquid level emasuring device and level measuring method based on anallatic transparency liquid | |
| CN106802176A (en) | A kind of water level detecting system | |
| CN202631043U (en) | Formation gas volume measurement device of flexible package lithium ion battery | |
| CN103234603B (en) | Floater mechanism and measurement method used for measuring liquid level of liquid pressure meter | |
| CN103344542A (en) | Device for measuring permeability coefficient by variable head method | |
| CN104848918A (en) | CCD-based essential oil filling measurement method | |
| CN111693109A (en) | Multifunctional storage tank liquid level meter | |
| RU2296958C2 (en) | Method for calibrating gas flow meters and device for its realization | |
| CN116990260A (en) | Alcohol concentration measuring method | |
| CN216309135U (en) | Liquid level measuring system | |
| RU2485449C1 (en) | Device to measure liquid flow in open canals | |
| CN107144296A (en) | A kind of hydrostatic level calibrating installation measured based on height gauge | |
| CN213068035U (en) | Compensation micro-pressure meter | |
| CN201107083Y (en) | Contrast type liquid level measuring device | |
| CN202648859U (en) | Liquid manometer calibrated by sound velocity in real time | |
| CN211262061U (en) | Double-guide-rail equal-height detection tool | |
| CN203940858U (en) | Can automatically quote the two-dimensional gradienter of measuring numerical value | |
| CN103512700B (en) | A kind of fluid pressure of velocity of sound real-time calibration takes into account pressure measurement method | |
| CN102323003A (en) | High-accuracy automatic liquid pressure gauge | |
| US10962432B2 (en) | Systems and methods for pressure measurement | |
| CN107144295A (en) | A kind of device of the portable hydrostatic level calibration measured based on height gauge | |
| CN202420484U (en) | Multi-functional frame-type level | |
| CN108374816B (en) | A kind of hydraulic interior leak detection apparatus and the detection method using the device | |
| CN110702018A (en) | Device and method for measuring thickness of sample in diamond anvil cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 Termination date: 20200325 |