CN104457907A - Novel non-contact detection device for measuring liquid level in insulating container - Google Patents
Novel non-contact detection device for measuring liquid level in insulating container Download PDFInfo
- Publication number
- CN104457907A CN104457907A CN201410756144.XA CN201410756144A CN104457907A CN 104457907 A CN104457907 A CN 104457907A CN 201410756144 A CN201410756144 A CN 201410756144A CN 104457907 A CN104457907 A CN 104457907A
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- electrode plate
- layer
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- metal
- 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 53
- 239000004020 conductor Substances 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims description 17
- 230000007613 environmental effect Effects 0.000 abstract 2
- 230000005284 excitation Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000009413 insulation Methods 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
- 230000007812 deficiency 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 novel 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 novel contactless detection device for measuring liquid level in insulating vessel.
[background technology]
At present, existing liquid level emasuring device can be subject to the impact of environment or fluid to be measured usually, and make testing result have deviation, its applicability is bad.
Therefore, be necessary to solve as above problem.
[summary of the invention]
Instant invention overcomes the deficiency of above-mentioned technology, providing a kind of novel contactless detection device for measuring liquid level in insulating vessel, its structure is simple and easy to realize, easy to detect.
For achieving the above object, present invention employs following technical proposal:
A kind of novel contactless detection device for measuring liquid level in insulating vessel, include the upside environment battery lead plate 1 for being arranged on insulating vessel lateral wall, downside reference electrode plate 2, and vertical potential electrode plate 3, described upside environment battery lead plate 1, downside reference electrode plate 2, vertical potential electrode plate 3 is all rectangular flat plate shape and all comprises middle insulated medium layer, be arranged on middle insulated medium layer side for measuring layer with the metal of insulating vessel wall contacts, and be arranged on middle insulated medium layer opposite side measures layer impact on metal metal screen layer for the shielding outside when measuring, wherein, it is parallel with described metal screen layer that described metal measures layer, the width of three electrode plate is all L, the lateral length of upside environment battery lead plate 1 and downside reference electrode plate 2 is all H1, the vertical extension of vertical potential electrode plate 3 is H3, described measurement mechanism also includes measures the isolated conductor capacitance C1 of layer for measuring metal on upside environment battery lead plate 1, in the reference electrode plate 2 of downside, metal measures the isolated conductor capacitance C2 of layer, and metal measures the direct earth capacitance sensor 4 of the isolated conductor capacitance C3 of layer on vertical potential electrode plate 3, described upside environment battery lead plate 1, downside reference electrode plate 2, and the metal of vertical potential electrode plate 3 measures layer and metal screen layer is electrically connected with described direct earth capacitance sensor 4 all respectively, described direct earth capacitance sensor 4 is also electrically connected with the controller 5 for calculating the height H x on relatively described vertical potential electrode plate 3 base of liquid level in insulating vessel according to the capacitance measurements of direct earth capacitance sensor 4.
A kind of novel contactless detection device for measuring liquid level in insulating vessel as above, described vertical potential electrode plate 3 base, downside reference electrode plate 2 base all maintain an equal level with insulating vessel bottom.
A kind of novel contactless detection device for measuring liquid level in insulating vessel as above, described vertical potential electrode plate 3 top, environment battery lead plate 1 top, upside all maintain an equal level with described insulating vessel upper end.
A kind of novel contactless detection device for measuring liquid level in insulating vessel as above, the height H 3 of described vertical potential electrode plate 3 is greater than its width L.
Compared with prior art, the invention has the beneficial effects as follows:
1, structure is simple and easy to realize, have employed upside environment battery lead plate, downside reference electrode plate and vertical potential electrode plate, height H x that direct earth capacitance sensor, controller come the relatively described vertical potential electrode plate base of liquid level in insulating vessel, it is easy to detect, the kind of testing result Hx and liquid has nothing to do, and applicability is good.
2, every electrode plate is all rectangular flat plate shape, all comprise middle insulated medium layer, be arranged on middle insulated medium layer side for measuring layer with the metal of insulating vessel wall contacts, and be arranged on middle insulated medium layer opposite side measures layer impact on metal metal screen layer for the shielding outside when measuring, direct earth capacitance sensor is when measuring metal and measuring the isolated conductor capacitance of layer, metal to same battery lead plate is measured on layer and metal screen layer and is applied same excitation, making the metal of same battery lead plate during measurement measure electromotive force between layer and metal screen layer is zero, thus shield layer is measured in outside impact on metal, improve the accuracy measured.
3, vertical potential electrode plate base, reference electrode plate base, downside all maintain an equal level with insulating vessel bottom, and so, the Hx recorded is the height on liquid level opposing insulation container base.
4, vertical potential electrode plate top, environment battery lead plate top, upside all maintain an equal level with described insulating vessel upper end, so, expand the vertical measurement range of vertical potential electrode plate as far as possible.
5, the height H 3 of vertical potential electrode plate is greater than its width L, reduces Width consumptive material, is convenient to concrete enforcement, is convenient to actual measurement and uses.
[accompanying drawing explanation]
Fig. 1 is structure principle chart of the present invention.
Fig. 2 is the scheme of installations of three electrode plate of the present invention on insulating vessel outer wall.
Fig. 3 is the three-decker schematic diagram of the every electrode plate of the present invention.
[embodiment]
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that the understanding of technician of the same trade:
As shown in Figure 1-2, a kind of novel contactless detection device for measuring liquid level in insulating vessel, it is characterized in that including the upside environment battery lead plate 1 for being arranged on insulating vessel lateral wall, downside reference electrode plate 2, and vertical potential electrode plate 3, described upside environment battery lead plate 1, downside reference electrode plate 2, vertical potential electrode plate 3 is all rectangular flat plate shape and all comprises middle insulated medium layer, be arranged on middle insulated medium layer side for measuring layer with the metal of insulating vessel wall contacts, and be arranged on middle insulated medium layer opposite side measures layer impact on metal metal screen layer for the shielding outside when measuring, wherein, it is parallel with described metal screen layer that described metal measures layer, the width of three electrode plate is all L, the lateral length of upside environment battery lead plate 1 and downside reference electrode plate 2 is all H1, the vertical extension of vertical potential electrode plate 3 is H3, described measurement mechanism also includes measures the isolated conductor capacitance C1 of layer for measuring metal on upside environment battery lead plate 1, in the reference electrode plate 2 of downside, metal measures the isolated conductor capacitance C2 of layer, and metal measures the direct earth capacitance sensor 4 of the isolated conductor capacitance C3 of layer on vertical potential electrode plate 3, described upside environment battery lead plate 1, downside reference electrode plate 2, and the metal of vertical potential electrode plate 3 measures layer and metal screen layer is electrically connected with described direct earth capacitance sensor 4 all respectively, described direct earth capacitance sensor 4 is also electrically connected with the controller 5 for calculating the height H x on relatively described vertical potential electrode plate 3 base of liquid level in insulating vessel according to the capacitance measurements of direct earth capacitance sensor 4.
Principle of work and the use procedure of this case are as follows:
During measurement, direct earth capacitance sensor 4 is measured metal on upside environment battery lead plate 1 respectively and is measured metal in the isolated conductor capacitance C1 of layer, downside reference electrode plate 2 and measure metal on the isolated conductor capacitance C2 of layer and vertical potential electrode plate 3 and measure the isolated conductor capacitance C3 of layer.
As mentioned above, when measuring metal and measuring the isolated conductor capacitance of layer, metal to same battery lead plate is measured on layer and metal screen layer and is applied same excitation, making the metal of same battery lead plate during measurement measure electromotive force between layer and metal screen layer is zero, thus shield layer is measured in outside impact on metal, improve the accuracy measured.
As mentioned above, wherein, capacitance C3 is the algebraic sum on the capacitance C under the capacitance C of vertical potential electrode plate 3 in insulating vessel under the impact of bottom liquid level with vertical potential electrode plate 3 under insulating vessel internal upper part air impact, namely to have under C3=C on+C, and the measurement environment of vertical potential electrode plate 3 upper part is the same with the measurement environment of upside environment battery lead plate 1, namely their specific inductive capacity are identical, and, the measurement environment of vertical potential electrode plate 3 lower part is the same with the measurement environment of downside reference electrode plate 2, namely their specific inductive capacity are identical, as mentioned above, the capacitance calculation formula of isolated conductor
three electrode plate and electromotive force are that the distance between the conductor of zero is identical, show that the size of capacitance is directly proportional to area, namely have:
and
Finally draw the height on relatively described vertical potential electrode plate 3 base, liquid level face in insulating vessel
As mentioned above, this case structure is simple and easy to realize, have employed upside environment battery lead plate 1, downside reference electrode plate 2 and vertical potential electrode plate 3, height H x that direct earth capacitance sensor 4, controller 5 come relatively described vertical potential electrode plate 3 base of liquid level in insulating vessel, it is easy to detect, the kind of testing result Hx and liquid has nothing to do, and applicability is good.
As mentioned above, when vertical potential electrode plate 3 base, downside reference electrode plate 2 base all maintain an equal level with insulating vessel bottom, so, the Hx recorded is the height on liquid level opposing insulation container base.
As mentioned above, vertical potential electrode plate 3 top, environment battery lead plate 1 top, upside all maintain an equal level with described insulating vessel upper end, so, expand the vertical measurement range of vertical potential electrode plate 3 as far as possible.
As mentioned above, the height H 3 of vertical potential electrode plate 3 is greater than its width L, reduces Width consumptive material, is convenient to concrete enforcement, is convenient to actual measurement and uses.
As mentioned above, what this case was protected is a kind of novel contactless detection device for measuring liquid level in insulating vessel, and all technical schemes identical or close with this case structure all should be shown for falling in the protection domain of this case.
Claims (4)
1. a novel contactless detection device for measuring liquid level in insulating vessel, it is characterized in that including upside environment battery lead plate (1) for being arranged on insulating vessel lateral wall, downside reference electrode plate (2), and vertical potential electrode plate (3), described upside environment battery lead plate (1), downside reference electrode plate (2), vertical potential electrode plate (3) is all rectangular flat plate shape and all comprises middle insulated medium layer, be arranged on middle insulated medium layer side for measuring layer with the metal of insulating vessel wall contacts, and be arranged on middle insulated medium layer opposite side measures layer impact on metal metal screen layer for the shielding outside when measuring, wherein, it is parallel with described metal screen layer that described metal measures layer, the width of three electrode plate is all L, the lateral length of upside environment battery lead plate (1) and downside reference electrode plate (2) is all H1, the vertical extension of vertical potential electrode plate (3) is H3, described measurement mechanism also includes the isolated conductor capacitance C1 measuring layer for measuring the upper metal in upside environment battery lead plate (1), the upper metal in downside reference electrode plate (2) measures the isolated conductor capacitance C2 of layer, and the upper metal of vertical potential electrode plate (3) measures the direct earth capacitance sensor (4) of the isolated conductor capacitance C3 of layer, described upside environment battery lead plate (1), downside reference electrode plate (2), and the metal of vertical potential electrode plate (3) measures layer and metal screen layer is electrically connected with described direct earth capacitance sensor (4) all respectively, described direct earth capacitance sensor (4) is also electrically connected with the controller (5) for calculating the height H x on relatively described vertical potential electrode plate (3) base of liquid level in insulating vessel according to the capacitance measurements of direct earth capacitance sensor (4).
2. a kind of novel contactless detection device for measuring liquid level in insulating vessel according to claim 1, is characterized in that described vertical potential electrode plate (3) base, downside reference electrode plate (2) base all maintain an equal level with insulating vessel bottom.
3. a kind of novel contactless detection device for measuring liquid level in insulating vessel according to claim 1, is characterized in that described vertical potential electrode plate (3) top, environment battery lead plate (1) top, upside all maintain an equal level with described insulating vessel upper end.
4. a kind of novel contactless detection device for measuring liquid level in insulating vessel according to claim 1-3 any one, is characterized in that the height H 3 of described vertical potential electrode plate (3) is greater 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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| CN104457907A true CN104457907A (en) | 2015-03-25 |
| CN104457907B CN104457907B (en) | 2017-10-13 |
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Cited By (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 |
| 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 |
| CN108140295A (en) * | 2015-09-15 | 2018-06-08 | 皇家飞利浦有限公司 | Motion detection device and corresponding method |
| WO2020098633A1 (en) * | 2018-11-13 | 2020-05-22 | 世强先进(深圳)科技股份有限公司 | Capacitive liquid level measurement device and method |
| CN111542733A (en) * | 2017-12-28 | 2020-08-14 | 考特克斯·特克斯罗恩有限公司及两合公司 | Operating fluid container comprising a built-in system for detecting a filling level |
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| 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 |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Cited By (9)
| 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 |
| CN108140295A (en) * | 2015-09-15 | 2018-06-08 | 皇家飞利浦有限公司 | Motion detection device and corresponding method |
| CN108140295B (en) * | 2015-09-15 | 2020-04-14 | 皇家飞利浦有限公司 | 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 |
| CN111542733A (en) * | 2017-12-28 | 2020-08-14 | 考特克斯·特克斯罗恩有限公司及两合公司 | Operating fluid container comprising a built-in system for detecting a filling level |
| CN111542733B (en) * | 2017-12-28 | 2022-05-03 | 考特克斯·特克斯罗恩有限公司及两合公司 | Operating fluid container comprising a built-in system for detecting a filling level |
| WO2020098633A1 (en) * | 2018-11-13 | 2020-05-22 | 世强先进(深圳)科技股份有限公司 | Capacitive liquid level measurement device and method |
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| CN104457907B (en) | 2017-10-13 |
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