CN101701815A - liquid height gauge - Google Patents
liquid height gauge Download PDFInfo
- Publication number
- CN101701815A CN101701815A CN200910259624A CN200910259624A CN101701815A CN 101701815 A CN101701815 A CN 101701815A CN 200910259624 A CN200910259624 A CN 200910259624A CN 200910259624 A CN200910259624 A CN 200910259624A CN 101701815 A CN101701815 A CN 101701815A
- Authority
- CN
- China
- Prior art keywords
- transparent tube
- solution
- syringe
- gas
- heat
- 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.)
- Pending
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 34
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims 5
- 238000007789 sealing Methods 0.000 abstract description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 10
- 229910052753 mercury Inorganic materials 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000005259 measurement Methods 0.000 description 8
- 239000003292 glue Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The liquid height measuring instrument comprises a closed heat-insulating container, wherein a certain amount of solution and gas are placed in the heat-insulating container; the transparent tube extends along the vertical direction, is provided with a through hole extending along the length direction, the lower end of the transparent tube is communicated with the solution in the heat-insulating container, and the upper end of the transparent tube is communicated with the atmosphere; the scale marks are distributed at equal intervals along the vertical direction and are matched with the transparent tube; the pressure adjusting device is used for adjusting the pressure of the gas in the heat-insulating container so as to align the liquid level of the solution in the transparent tube with a certain scale mark, and is provided with a sealing cavity communicated with the gas in the heat-insulating container and an operating part used for adjusting the size of the sealing cavity.
Description
Technical field
The present invention relates to adopt the height-gauge of the little liquid of density as medium, is a kind of measuring instrument that utilizes atmospheric pressure to come measuring height.
Background technology
In the prior art, the instrument that is used to measure sea level elevation generally is to adopt barometric altimeter, measure the pressure of tested height and position by barometer, calculate the height of measured object then, but existing its degree of accuracy of aneroid barometric altimeter is lower, error is big, can't measure the height on mountain range exactly, it is particularly evident particularly to measure its error of low height above sea level mountain range, low as aneroid barometer sensitivity, error is bigger, should not be used for actual measurement; The mercury gage scale is little, and unit is big, estimate number and be difficult to accurately, and length more also inconvenience carry and use; Utilize evangelista torricelli experiment to have the disadvantage of mercury gage equally, operation is also pretty troublesome and pollution arranged in addition.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of simple in structure, easy to use, height-gauge that degree of accuracy is high is provided.
Purpose of the present invention is achieved through the following technical solutions:
Liquid height measuring instrument comprises an airtight cool-bag, and its inside is placed with certain quantity solution and gas; One transparent tube is vertically extended, and is formed with the through hole that extends along its length direction, and its lower end is connected with solution in the described cool-bag, and the upper end is connected with atmosphere; Some scale marks, vertically equidistantly distribute, and be equipped with described transparent tube, it is characterized in that: also comprise a pressure regulating device, be used for regulating the pressure of described cool-bag gas, so that the liquid level of solution described in the transparent tube aligns with a certain scale mark, it has annular seal space that is connected with gas in the described cool-bag and the controls that is used to regulate described annular seal space size.
Described pressure regulating device is a syringe, and the needle tubing of syringe is connected with gas in the described cool-bag, and the piston rod of syringe can be handled and slide in the syringe of syringe, to regulate the size of the annular seal space that syringe and piston rod were surrounded.
One section of described transparent tube vertically is inserted in the described cool-bag, and its lower end stretches in the described solution, and another section outer peripheral face that described transparent tube is positioned at described cool-bag outside equidistantly is distributed with some scale marks along its length direction.
The internal diameter of described transparent tube is 1mm～2mm.
Solution in the described cool-bag is red solution.
Principle of work of the present invention and beneficial effect:
Because the internal diameter of transparent tube is less, in transparent tube in the liquid level change procedure of solution, can ignore to the influence of the volume of gas in the cool-bag, and cool-bag can guarantee the temperature-resistant of gas, according to formula PV=nRT, can set the pressure P of gas in the cool-bag
0It is definite value.If the atmospheric pressure of datum is P
1, the atmospheric pressure at tested place is P
2By physics knowledge P
0=P+ ρ gh can get:
P
1＝P
0-ρgh
1??P
2＝P
0-ρgh
2
P
1-P
2＝ρg(h
2-h
1)＝ρgh
The air pressure at datum and tested place poor equals the pressure that the fluid column two difference in height h of place produce in the transparent tube.And the pressure P in pressure difference and the constant voltage bottle
0Size is irrelevant.
If mercury density is ρ
Hg, fluid density is ρ
Liquid, the mercury difference in height is h
Hg, the difference in height of solution is h
Liquid, then:
P
1-P
2=ρ
HgG h
Hg=ρ
LiquidGh
Liquid
According in height above sea level 2 kms, 12 meters of every risings, atmospheric pressure reduces to be about 1 millimeter (10
-3M) mercury slug.Therefore, the height difference H of tested place and datum can be expressed as:
Formula shows: if the gas pressure intensity P in the maintenance cool-bag
0Constant, the height at tested place is high more, and the atmospheric pressure of being surveyed is more little, and the liquid level of solution rises highly more in the transparent tube.And the difference in height h of liquid level of solution in the height difference H of tested place and datum and the transparent tube
LiquidBecome simple linear proportional relation.
Different densities and mercury density p according to various solution
Hg=13.6 * 10
3Kg/m
3, can draw following table:
| Solution | Water | Alcohol | Gasoline | Kerosene |
| Density (* 10 3kg/m 3) | ??1.00 | ??0.79 | ??0.70 | ??0.80 |
| The relation of measuring height difference and liquid-column height difference | ??H＝0.882×??10 3h Liquid | ??H＝0.697×??10 3h Liquid | ??H＝0.618×??10 3h Liquid | ??H＝0.706×??10 3h Liquid |
| The corresponding liquid-column height difference of unit height difference h Liquid(mm) | ??1.133 | ??1.435 | ??1.618 | ??1.416 |
The spacing that can set adjacent two scale marks for convenience of reading of the present invention is
And the setting Digital ID corresponding with corresponding scale mark, promptly scale mark one lattice are measuring height 1m during reading, can carry out reading easily and intuitively.
The pressure regulating device, regulate the volume of gas in the cool-bag by the size of regulating annular seal space, the final pressure of regulating gas in the described cool-bag, so that the liquid level of solution described in the transparent tube aligns with a certain scale mark (normally zero graduation line), prevent because of solution evaporation influences reading, the repeatedly zeroing accumulative total of being convenient to measure higher height above sea level is simultaneously measured, adopt barometric control unit, as long as the transparent tube of about 20 centimeter length is 2000 meters of energy measurements even bigger height just, measuring height is big, and is practical.If adopt the less pure water of density to replace the bigger mercury of density, the highly transparent pipe that does not have barometric control unit will measure 1000 meters is approximately wanted 1.3 meters long, as bring making like this, to carry inconvenience.
Cool-bag can make the present invention not be subjected to the influence of ambient temperature in measuring process.
Adopt less, the metastable solution of density to replace the big mercury of density, the height-gauge of making, simpler and easy accurately than traditional height-gauge, accuracy can reach in 1 meter; Adopt the transparent tube of internal diameter 1mm-2mm, do not influencing the influence that reduces capillarity under the experiment condition to greatest extent, the liquid level of solution rises, descends freely, is quick on the draw.
The present invention is simple in structure, easy to make, can be used as the teaching aid in the study course of middle school, perhaps allows student oneself action make, and improves students'ability for practice, motivates students' interest in learning.
Description of drawings
The present invention is further detailed explanation below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present invention.
Embodiment
With reference to Fig. 1.Liquid height measuring instrument comprises airtight cool-bag 1, transparent tube 5, pressure regulating device 4, cool-bag 1, and for thermos or other have the container of insulation effect, its inside is placed with a certain amount of red solution 2 and gas 3; Transparent tube 5, vertically extend, and be formed with the through hole that extends along its length direction, one section is inserted in the cool-bag 1, and the lower end is connected with solution 2, and its outside surface that is positioned at another section of cool-bag 1 outside has some scale marks along its length direction spaced set, and the Digital ID corresponding with corresponding scale mark, and the upper end is connected with atmosphere, and the internal diameter of transparent tube is 1.5mm; Pressure regulating device 4 is a syringe, the needle tubing of syringe is connected with gas 3 in the cool-bag, the piston rod of syringe can be handled and be slided in the syringe of syringe, to regulate the size of the annular seal space that syringe and piston rod were surrounded, be used for regulating the pressure of cool-bag 1 gas 3, so that the liquid level of solution aligns with a certain scale mark in the transparent tube 5, pressure regulating device 4 also can be used other devices with adjustments of gas 3 volume functions.
Method for making of the present invention is as follows:
Need use equipment and instrument: thermos (about 250ml), one of a calibrated pipet, plastic injector two (5ml, 50ml), pure water, potassium permanganate, AB double-tube glue, No. 5 flexible glue plugs, No. 12 syringe needles, transparent rubberized fabric, beaker (250ml), a scissors, card punch, copper wire etc.
Card punch bores a hole more smaller than transparent tube at the flexible glue plug, inserts the flexible glue plug at leisure with the water-wet calibrated pipet, inserts saturating flexible glue plug, the dial-out copper wire after copper wire is passed No. 12 syringe needles.
Bottleneck and the sealing of ready-made flexible glue plug jam-pack with thermos mix sealing if any the bad available AB double-tube glue of sealing.Add the potassium permanganate of a granule at beaker, add the pure water vibration evenly to increase visibility; Water with the syringe holder red color of 50ml injects about 100ml in the thermos.To put upside down water filling to thermos, could drive the air in the thermos come out of from transparent tube.
Whole device is just vertically being put, extracted the syringe of 50ml, inserting the zeroing syringe of 5ml, red water rises along the calibrated pipet pipe core, and regulates the pure water liquid level and align with 0 scale mark or certain integer of calibrated pipet next door scale mark.
The friction force that facts have proved the syringe piston on this altitude gauge is enough big, durable in use, can syringe piston be slided naturally because of the pressure difference inside and outside the altitude gauge bottle.If for a long time time spent not, pull out syringe piston, in case temperature is when raising, red water rises in the calibrated pipet pipe core and leaks outside.
Height-gauge is because the vibration the when variation of temperature or carrying, and wherein error can appear in scale.Therefore before measurement, must carry out the scale adjustment.Utilize mercury gage to carry out adjustment.Syringe debugging with 5ml makes the transparent tube intraluminal fluid face of liquid height measuring instrument align with 0 scale mark, writes down the reading of mercury gage, is converted into sea level elevation.
During measurement, height-gauge is taken tested height, is put in height-gauge on the surface level and makes it vertical, leave standstill a little while, just can read pure water liquid level rising h, utilize formula from the calibrated pipet scale mark:
H=0.882 * 10
3H just can calculate the sea level elevation in building height or somewhere.
Adopt height-gauge provided by the invention that the height of certain each floor of building is measured, measurement data is as follows:
| The number of plies | True altitude (rice) | Registration (lattice) | Accuracy rate |
| ??1 | ??0 | ??0 | ??100％ |
| ??2 | ??4.2 | ??4.5 | ??92.9％ |
| ??3 | ??7.6 | ??8 | ??94.7％ |
| ??4 | ??11 | ??11 | ??100％ |
| ??5 | ??14.4 | ??14 | ??97.2％ |
| ??6 | ??17.8 | ??18 | ??98.9％ |
| ??7 | ??21.2 | ??21 | ??99.1％ |
| ??8 | ??24.6 | ??24.5 | ??99.6％ |
| ??9 | ??28 | ??28 | ??100％ |
| ??10 | ??31.4 | ??31.5 | ??99.7％ |
| ??11 | ??34.8 | ??34.5 | ??99.1％ |
| ??12 | ??38.2 | ??38 | ??99.5％ |
| ??13 | ??41.6 | ??41.5 | ??99.8％ |
From top measurement data as can be seen, measuring height is high more, and relative error is more little, the measurement data accuracy rate of measuring height more than 20 meters is all more than 99%, and actual measurement exists error very little, and the reason that error produces has, during the eyes observed reading, there is certain error in the visual angle; The reading of liquid level can only be that estimating of half-space half-space read, and this is the main cause of error.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910259624A CN101701815A (en) | 2009-12-21 | 2009-12-21 | liquid height gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910259624A CN101701815A (en) | 2009-12-21 | 2009-12-21 | liquid height gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101701815A true CN101701815A (en) | 2010-05-05 |
Family
ID=42156735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910259624A Pending CN101701815A (en) | 2009-12-21 | 2009-12-21 | liquid height gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101701815A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103258459A (en) * | 2013-02-21 | 2013-08-21 | 浙江豪情汽车制造有限公司 | Liquid amount visual measurement training station |
| CN109431481A (en) * | 2018-12-25 | 2019-03-08 | 苏州博思光学有限公司 | Mini optical fibre pressure sensor and its manufacturing method, pressure capsule system |
-
2009
- 2009-12-21 CN CN200910259624A patent/CN101701815A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103258459A (en) * | 2013-02-21 | 2013-08-21 | 浙江豪情汽车制造有限公司 | Liquid amount visual measurement training station |
| CN109431481A (en) * | 2018-12-25 | 2019-03-08 | 苏州博思光学有限公司 | Mini optical fibre pressure sensor and its manufacturing method, pressure capsule system |
| CN109431481B (en) * | 2018-12-25 | 2024-03-19 | 苏州博思光学有限公司 | Micro optical fiber pressure sensor, manufacturing method thereof and pressure sensing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100505 |