CN104457907B - Non-contact detection device for measuring liquid level in insulating container - Google Patents
Non-contact detection device for measuring liquid level in insulating container Download PDFInfo
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- CN104457907B CN104457907B CN201410756144.XA CN201410756144A CN104457907B CN 104457907 B CN104457907 B CN 104457907B CN 201410756144 A CN201410756144 A CN 201410756144A CN 104457907 B CN104457907 B CN 104457907B
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- insulating vessel
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- 239000007788 liquid Substances 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 51
- 229910052751 metal Inorganic materials 0.000 claims abstract description 51
- 239000004020 conductor Substances 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims description 55
- 230000005611 electricity Effects 0.000 claims description 11
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract 2
- 238000010276 construction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The invention discloses a non-contact detection device for measuring liquid level in an insulating container, which comprises an upper environmental electrode plate, a lower reference electrode plate and a vertical measuring electrode plate, wherein each electrode plate comprises a middle insulating medium layer, a metal measuring layer and a metal shielding layer, the measuring device also comprises an isolated conductor capacitance value C1 for measuring the metal measuring layer on the upper environmental electrode plate, an isolated conductor capacitance value C2 for measuring the metal measuring layer on the lower reference electrode plate and a grounded capacitance sensor for measuring the isolated conductor capacitance value C3 for the metal measuring layer on the vertical measuring electrode plate, and the grounded capacitance sensor is also electrically connected with a controller for calculating the height Hx of the liquid level in the insulating container relative to the bottom edge of the vertical measuring electrode plate according to the capacitance measuring result of the grounded capacitance sensor. The present case simple structure easily realizes, and it is convenient to detect.
Description
[technical field]
The present invention relates to a kind of contactless detection device for being used to measure liquid level in insulating vessel.
[background technology]
At present, existing liquid level emasuring device would generally be influenceed by environment or fluid to be measured so that testing result has
Deviation, its applicability is bad.
Therefore, it is necessary to solve as above problem.
[content of the invention]
Not enough instant invention overcomes above-mentioned technology there is provided a kind of is used to measure the contactless of liquid level in insulating vessel
Detection means, its easy realization simple in construction is easy to detect.
To achieve the above object, present invention employs following technical proposal：
A kind of contactless detection device for being used to measure liquid level in insulating vessel, includes for being arranged on insulating vessel
Upside environment battery lead plate 1, downside reference electrode plate 2 and vertical measuring electrode plate 3 on lateral wall, the upside environment electricity
Pole plate 1, downside reference electrode plate 2, vertical measuring electrode plate 3 all for rectangular flat plate shape and all include middle insulated medium layer,
Middle insulated medium layer side is arranged on for the metal measurement layer with insulating vessel wall contacts and intermediate insulation is arranged on
Dielectric layer opposite side is used for the metal screen layer influenceed in measurement on the outside of shielding on metal measurement layer, wherein, the metal is surveyed
Amount layer is parallel with the metal screen layer, and the width of three electrode plates is all L, upside environment battery lead plate 1 and downside reference electrode
The lateral length of plate 2 is all H1, and the vertical extension of vertical measuring electrode plate 3 is H3, and this non-contact measurement apparatus also includes
For measuring the isolated conductor capacitance C1 of metal measurement layer on upside environment battery lead plate 1, metal is surveyed in downside reference electrode plate 2
The isolated conductor capacitance C3's of metal measurement layer connects on the isolated conductor capacitance C2 of amount layer and vertically measuring electrode plate 3
Ground capacitance sensor 4, the metal of the upside environment battery lead plate 1, downside reference electrode plate 2 and vertical measuring electrode plate 3 is surveyed
Amount layer and metal screen layer are all electrically connected with the ground capacity sensor 4 respectively, are also electrically connected on the ground capacity sensor 4
It is connected to for calculating the relatively described vertical measurement electricity of liquid level in insulating vessel according to the capacitance measurements of ground capacity sensor 4
The height Hx on the base of pole plate 3 controller 5.
A kind of contactless detection device for being used to measure liquid level in insulating vessel as described above, the vertical measurement electricity
The base of pole plate 3, the base of downside reference electrode plate 2 all maintain an equal level with insulating vessel bottom.
A kind of contactless detection device for being used to measure liquid level in insulating vessel as described above, the vertical measurement electricity
The top of pole plate 3, the top of upside environment battery lead plate 1 all maintain an equal level with the insulating vessel upper end.
A kind of contactless detection device for being used to measure liquid level in insulating vessel as described above, the vertical measurement electricity
The height H3 of pole plate 3 is more than its width L.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, easy realization simple in construction, employs upside environment battery lead plate, downside reference electrode plate and vertical measuring electrode
Plate, ground capacity sensor, controller carry out the height Hx on the relatively described vertical measuring electrode plate base of liquid level in insulating vessel, its
Easy to detect, testing result Hx is unrelated with the species of liquid, and applicability is good.
2nd, all it is rectangular flat plate shape per electrode plate, all including middle insulated medium layer, is arranged on middle insulated medium
Layer side is used for and the metal measurement layers of insulating vessel wall contacts and is arranged on middle insulated medium layer opposite side and is used for
The metal screen layer that shielding outside influences on metal measurement layer during measurement, orphan of the ground capacity sensor in measurement metal measurement layer
During vertical capacitance of conductor value, to the metal measurement layer and metal screen layer of same battery lead plate on apply same excitation, when making measurement
Potential is zero between the metal measurement layer and metal screen layer of same battery lead plate, so as to shield shadow of the outside to metal measurement layer
Ring, improve the accuracy of measurement.
3rd, vertical measuring electrode plate base, downside reference electrode plate base all maintain an equal level with insulating vessel bottom, in this way, measuring
Hx be liquid level opposing insulation container base height.
4th, vertical measuring electrode plate top, upside environment battery lead plate top all maintain an equal level with the insulating vessel upper end, in this way,
Expand the vertical measurement range of vertical measuring electrode plate as far as possible.
5th, the height H3 of vertical measuring electrode plate is more than its width L, reduces width consumptive material, is easy to specific implementation,
It is easy to actual measurement to use.
[brief description of the drawings]
Fig. 1 is the structure principle chart of the present invention.
Fig. 2 is scheme of installation of three electrode plates of the present invention on insulating vessel outer wall.
Fig. 3 is three-decker schematic diagram of the present invention per electrode plate.
[embodiment]
Feature of present invention and other correlated characteristics are described in further detail by embodiment below in conjunction with accompanying drawing, so as to
In the understanding of technical staff of the same trade：
As shown in Figure 1-2, a kind of contactless detection device for being used to measure liquid level in insulating vessel, it is characterised in that bag
Include for the upside environment battery lead plate 1 being arranged on insulating vessel lateral wall, downside reference electrode plate 2 and vertical measurement
Battery lead plate 3, the upside environment battery lead plate 1, downside reference electrode plate 2, vertical measuring electrode plate 3 all for rectangular flat plate shape and
All include middle insulated medium layer, be arranged on middle insulated medium layer side for being measured with the metal of insulating vessel wall contacts
Layer and be arranged on middle insulated medium layer opposite side be used for measurement when shielding on the outside of on metal measurement layer influence metal screen
Layer is covered, wherein, the metal measurement layer is parallel with the metal screen layer, and the width of three electrode plates is all L, upside environment electricity
Pole plate 1 and the lateral length of downside reference electrode plate 2 are all H1, and the vertical extension of vertical measuring electrode plate 3 is H3, this noncontact
Formula measurement apparatus also includes for measuring the isolated conductor capacitance C1 of metal measurement layer, downside on upside environment battery lead plate 1
In reference electrode plate 2 on the isolated conductor capacitance C2 of metal measurement layer and vertical measuring electrode plate 3 metal measurement layer orphan
Vertical capacitance of conductor value C3 ground capacity sensor 4, the upside environment battery lead plate 1, downside reference electrode plate 2 and vertical
The metal measurement layer and metal screen layer of measuring electrode plate 3 are all electrically connected with the ground capacity sensor 4 respectively, the ground connection
Also it is electrically connected with capacitance sensor 4 for calculating liquid in insulating vessel according to the capacitance measurements of ground capacity sensor 4
The height Hx on the relatively described vertical base of measuring electrode plate 3 in position controller 5.
The operation principle and use process of this case are as follows：
During measurement, ground capacity sensor 4 measures the isolated conductor electricity of metal measurement layer on upside environment battery lead plate 1 respectively
Gold on the isolated conductor capacitance C2 of metal measurement layer and vertical measuring electrode plate 3 on capacitance C1, downside reference electrode plate 2
Belong to the isolated conductor capacitance C3 of measurement layer.
As described above, when measuring the isolated conductor capacitance of metal measurement layer, to the metal measurement layer of same battery lead plate
With apply same excitation on metal screen layer, electricity between the metal measurement layer and metal screen layer of same battery lead plate when making measurement
Gesture is zero, so as to shield influence of the outside to metal measurement layer, improves the accuracy of measurement.
As described above, wherein, capacitance C3 is electricity of the vertical measuring electrode plate 3 in insulating vessel under the influence of the liquid level of bottom
Algebraical sum under capacitance C with vertical measuring electrode plate 3 on capacitance C under insulating vessel internal upper part air impact, that is, have C3
Under=C on+C, and the measuring environment of part is as the measuring environment of upside environment battery lead plate 1 on vertical measuring electrode plate 3, i.e.,
Their dielectric constants are identical, also, the measurement of the measuring environment and downside reference electrode plate 2 of vertical 3 times parts of measuring electrode plate
Environment is the same, i.e., their dielectric constants are identical, as described above, the electric capacity calculation formula of isolated conductorThree electrode plates
It is identical with the distance between conductor that potential is zero, show that the size of capacitance is directly proportional to area, that is, have：
And
The final height for drawing the relatively described vertical base of measuring electrode plate 3 in liquid level face in insulating vessel
As described above, this case it is simple in construction it is easy realize, employ upside environment battery lead plate 1, downside reference electrode plate 2, with
And vertical measuring electrode plate 3, ground capacity sensor 4, controller 5 carry out the relatively described vertical measuring electrode of liquid level in insulating vessel
The height Hx on the base of plate 3, its is easy to detect, and testing result Hx is unrelated with the species of liquid, and applicability is good.
As described above, when the vertical base of measuring electrode plate 3, the base of downside reference electrode plate 2 are all held with insulating vessel bottom
It is flat, in this way, the Hx measured is the height on liquid level opposing insulation container base.
As described above, the vertical top of measuring electrode plate 3, the top of upside environment battery lead plate 1 all with the insulating vessel upper end
Maintain an equal level, in this way, expanding the vertical measurement range of vertical measuring electrode plate 3 as far as possible.
As described above, the height H3 of vertical measuring electrode plate 3 is more than its width L, reduce width consumptive material, be easy to specific
Implementation, be easy to actual measurement to use.
As described above, this case protection is a kind of contactless detection device for being used to measure liquid level in insulating vessel, one
Cutting the technical scheme same or like with this case structure should all be shown as falling into the protection domain of this case.
Claims (4)
1. a kind of contactless detection device for being used to measure liquid level in insulating vessel, it is characterised in that include for being arranged on
Upside environment battery lead plate (1), downside reference electrode plate (2) and vertical measuring electrode plate (3) on insulating vessel lateral wall,
The upside environment battery lead plate (1), downside reference electrode plate (2), vertical measuring electrode plate (3) are all rectangular flat plate shape and all
Including middle insulated medium layer, middle insulated medium layer side is arranged on for being measured with the metal of insulating vessel wall contacts
Layer and be arranged on middle insulated medium layer opposite side be used for measurement when shielding on the outside of on metal measurement layer influence metal screen
Layer is covered, wherein, the metal measurement layer is parallel with the metal screen layer, and the width of three electrode plates is all L, upside environment electricity
Pole plate (1) and the lateral length of downside reference electrode plate (2) they are all H1, and the vertical extension of vertical measuring electrode plate (3) is H3, this
Non-contact measurement apparatus also includes the isolated conductor capacitance for measuring metal measurement layer on upside environment battery lead plate (1)
Gold on the isolated conductor capacitance C2 of metal measurement layer and vertical measuring electrode plate (3) on C1, downside reference electrode plate (2)
Belong to the isolated conductor capacitance C3 of measurement layer ground capacity sensor (4), the upside environment battery lead plate (1), downside reference
The metal measurement layer and metal screen layer of battery lead plate (2) and vertical measuring electrode plate (3) are all passed with the ground capacity respectively
Sensor (4) is electrically connected, and is also electrically connected with the ground capacity sensor (4) for the electricity according to ground capacity sensor (4)
Hold the controller (5) that measurement result calculates the height Hx on relatively described vertical measuring electrode plate (3) base of liquid level in insulating vessel.
2. a kind of contactless detection device for being used to measure liquid level in insulating vessel according to claim 1, its feature
It is that vertical measuring electrode plate (3) base, downside reference electrode plate (2) base all maintain an equal level with insulating vessel bottom.
3. a kind of contactless detection device for being used to measure liquid level in insulating vessel according to claim 1, its feature
It is that vertical measuring electrode plate (3) top, upside environment battery lead plate (1) top all maintain an equal level with the insulating vessel upper end.
4. a kind of non-contact detection dress for being used to measure liquid level in insulating vessel according to claim 1-3 any one
Put, it is characterised in that the height H3 of the vertical measuring electrode plate (3) is more than its width L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410756144.XA CN104457907B (en) | 2014-12-10 | 2014-12-10 | Non-contact detection device for measuring liquid level in insulating container |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410756144.XA CN104457907B (en) | 2014-12-10 | 2014-12-10 | Non-contact detection device for measuring liquid level in insulating container |
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| Publication Number | Publication Date |
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| CN104457907A CN104457907A (en) | 2015-03-25 |
| CN104457907B true CN104457907B (en) | 2017-10-13 |
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| CN201410756144.XA Active CN104457907B (en) | 2014-12-10 | 2014-12-10 | Non-contact detection device for measuring liquid level in insulating container |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880234A (en) * | 2015-06-02 | 2015-09-02 | 广东美的厨房电器制造有限公司 | Liquid level sensor and liquid level detection method |
| CN105043502A (en) * | 2015-07-31 | 2015-11-11 | 广东美的制冷设备有限公司 | Liquid level detection device, liquid level detection method and dehumidifier |
| US9551804B1 (en) * | 2015-09-15 | 2017-01-24 | Koninklijke Philips N.V. | Motion detection device and corresponding method |
| CN105571682A (en) * | 2015-12-30 | 2016-05-11 | 重庆山外山血液净化技术股份有限公司 | Tank liquid level detection system |
| CN106441502A (en) * | 2016-08-29 | 2017-02-22 | 长春迪瑞医疗科技股份有限公司 | Device and method for noncontact measuring of remaining reagent amount |
| DE102017223855A1 (en) * | 2017-12-28 | 2019-07-04 | Kautex Textron Gmbh & Co. Kg | Operating fluid tank with integrated system for the detection of the filling level |
| CN109443489A (en) * | 2018-11-13 | 2019-03-08 | 世强先进(深圳)科技股份有限公司 | A kind of capacitance type liquid level measuring device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6073488A (en) * | 1997-12-22 | 2000-06-13 | Abb Research Ltd. | Capacitive liquid level sensor with integrated pollutant film detection |
| CN201152767Y (en) * | 2008-02-19 | 2008-11-19 | 俞险峰 | Non-contact capacitor induction water level sensor |
| CN101545799A (en) * | 2009-04-24 | 2009-09-30 | 江苏工业学院 | Non-contact sensor for simultaneously detecting liquid level and electrical conductivity |
| CN101903755A (en) * | 2007-12-28 | 2010-12-01 | 飞思卡尔半导体公司 | Liquid level sensing device and method |
| CN204241069U (en) * | 2014-12-10 | 2015-04-01 | 华帝股份有限公司 | Novel non-contact detection device for measuring liquid level in insulating container |
-
2014
- 2014-12-10 CN CN201410756144.XA patent/CN104457907B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6073488A (en) * | 1997-12-22 | 2000-06-13 | Abb Research Ltd. | Capacitive liquid level sensor with integrated pollutant film detection |
| CN101903755A (en) * | 2007-12-28 | 2010-12-01 | 飞思卡尔半导体公司 | Liquid level sensing device and method |
| CN201152767Y (en) * | 2008-02-19 | 2008-11-19 | 俞险峰 | Non-contact capacitor induction water level sensor |
| CN101545799A (en) * | 2009-04-24 | 2009-09-30 | 江苏工业学院 | Non-contact sensor for simultaneously detecting liquid level and electrical conductivity |
| CN204241069U (en) * | 2014-12-10 | 2015-04-01 | 华帝股份有限公司 | Novel non-contact detection device for measuring liquid level in insulating container |
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| CN104457907A (en) | 2015-03-25 |
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