CN2387520Y - High precision capacitive sensing liquid level measurer - Google Patents
High precision capacitive sensing liquid level measurer Download PDFInfo
- Publication number
- CN2387520Y CN2387520Y CN 99228882 CN99228882U CN2387520Y CN 2387520 Y CN2387520 Y CN 2387520Y CN 99228882 CN99228882 CN 99228882 CN 99228882 U CN99228882 U CN 99228882U CN 2387520 Y CN2387520 Y CN 2387520Y
- Authority
- CN
- China
- Prior art keywords
- electrode
- liquid level
- utility
- level measuring
- fluid level
- 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
- 239000007788 liquid Substances 0.000 title abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 5
- 239000012212 insulator Substances 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000003628 erosive effect Effects 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 229910000679 solder Inorganic materials 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000001939 inductive effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Images
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses a capacitive sensing liquid level measurer with high precision, comprising a metal casing, electrode arranging seats, and a cable line. An electrode comprises an inner electrode, an upper outer electrode, and a lower outer electrode. The upper outer electrode and the lower outer electrode are fixedly connected with each other by an insulator. The upper ends of the inner electrode and the upper outer electrode are fixedly connected with an upper electrode arranging seat. The lower ends of the inner electrode and the lower outer electrode are fixedly connected with a lower electrode arranging seat. The utility model has simple structure; when measured liquid level changes, the ratio of an upper capacitance and a lower capacitance in the metal casing changes; thus, a measuring circuit can detect value of change of liquid level. The utility model has no interference by environmental factors and high measuring precision.
Description
The utility model relates to a kind of instrument that utilizes capacitive transducer to carry out level gauging.
The micro-pressure sensor that a kind of measuring liquid level is arranged at present, its measuring condition requires high, and precision height, but complex structure involve great expense.The differential capacitance sensor that also has a kind of Displacement Measurement, its dynode must relatively move in electrode, complex structure, volume is big.For level gauging, the specific inductive capacity of fluid to be measured can influence the raising of capacitance sensing measuring accuracy with environmental change.
The purpose of this utility model is, overcomes the shortcoming of prior art, and a kind of simple in structure, capacitance sensing fluid level measuring instrument that measuring accuracy is high is provided.
The purpose of this utility model is achieved through the following technical solutions: a kind of high-accuracy capacitor sensing fluid level measuring instrument, its composition comprises metal shell, electrode, electrode mount pad, cable, communicating pipe by housing bottom is connected with the fluid to be measured container bottom, it is characterized in that electrode comprises interior electrode and upper and lower external electrode, upper and lower external electrode is fixedly connected by insulator, fixedlying connected with the top electrode mount pad with the upper end of last external electrode in the upper end of interior electrode, fixedlys connected with the bottom electrode mount pad in the lower end of the lower end of interior electrode and following external electrode.
The utility model is simple in structure, and electrode and upper and lower external electrode constitute upper and lower two electric capacity in it.When tested liquid level change, the ratio of upper and lower two electric capacity will change thereupon in the housing, and metering circuit can be measured the liquid level change value in view of the above.Measuring instrument adopts the metering system of two capacitance ratios, can eliminate the influence that is unfavorable for improving measuring accuracy that the specific inductive capacity because of fluid to be measured produces with environmental change.The purpose of this utility model is achieved.
With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in detail.
Fig. 1 is the utility model one-piece construction synoptic diagram.
The composition of the utility model high-accuracy capacitor sensing fluid level measuring instrument comprises metal shell 2, electrode mount pad 3,8, cable 1, communicating pipe 10 by housing bottom is connected with fluid to be measured container 9 bottoms, electrode 5 and upper and lower external electrode 4,7 in electrode comprises, upper and lower external electrode 4,7 is fixedly connected by insulator 6, fixedlying connected with top electrode mount pad 3 in the upper end of the upper end of interior electrode 5 and last external electrode 4, fixedlys connected with bottom electrode mount pad 8 in the lower end of the lower end of interior electrode 5 and following external electrode 7.
Electrode can be the cylinder that the cross section is any one geometric configuration in of the present utility model, and among the embodiment, interior electrode is a right cylinder; External electrode can be the cylinder that the cross section is any one geometric configuration, and among the embodiment, dispatch from foreign news agency is the face of cylinder very.
For the utility model can both be moved under various severe environmental conditions reliably and with long-term, further Feature is: (1), electrode are manufactured by metallizing film on the erosion resisting insulation material of Heat stability is good Form, all have the erosion resisting insulation material coating on (2), electrode surface and the cable solder joint. Like this, the utility model measuring instrument can reach multiple corrosive liquid environment under 100% damp condition Work long-term effectively down.
Claims (4)
1, high-accuracy capacitor sensing fluid level measuring instrument, its composition comprises metal shell, electrode, electrode mount pad, cable, communicating pipe by housing bottom is connected with the fluid to be measured container bottom, it is characterized in that electrode comprises interior electrode and upper and lower external electrode, upper and lower external electrode is fixedly connected by insulator, fixedlying connected with the top electrode mount pad with the upper end of last external electrode in the upper end of interior electrode, fixedlys connected with the bottom electrode mount pad in the lower end of the lower end of interior electrode and following external electrode.
2, high-accuracy capacitor sensing fluid level measuring instrument according to claim 1, electrode is a right cylinder in it is characterized in that, dispatch from foreign news agency is the face of cylinder very.
3, high-accuracy capacitor sensing fluid level measuring instrument according to claim 1 is characterized in that electrode is manufactured by metallizing film on the erosion resisting insulation material of Heat stability is good to form.
4, according to claim 1 or 2 or 3 described high-accuracy capacitor sensing fluid level measuring instruments, it is characterized in that all having the erosion resisting insulation material coating on electrode surface and the cable solder joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228882 CN2387520Y (en) | 1999-07-15 | 1999-07-15 | High precision capacitive sensing liquid level measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228882 CN2387520Y (en) | 1999-07-15 | 1999-07-15 | High precision capacitive sensing liquid level measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2387520Y true CN2387520Y (en) | 2000-07-12 |
Family
ID=34018188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99228882 Expired - Lifetime CN2387520Y (en) | 1999-07-15 | 1999-07-15 | High precision capacitive sensing liquid level measurer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2387520Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427898C (en) * | 2004-10-29 | 2008-10-22 | 日本特殊陶业株式会社 | Liquid state detecting sensor |
| CN100442027C (en) * | 2006-03-17 | 2008-12-10 | 英属盖曼群岛商胜光科技股份有限公司 | Liquid level detecting device method therefor |
| CN102012248A (en) * | 2010-12-20 | 2011-04-13 | 扬州汽车传感器工程技术研究所 | Capacitance type water level sensor |
| CN102680052A (en) * | 2012-05-10 | 2012-09-19 | 张家港市赛达机械有限公司 | Connecting structure of leading-out lead of capacitive low-temperature liquid level meter |
| CN103575360A (en) * | 2012-07-19 | 2014-02-12 | 北京航天试验技术研究所 | Circuit measuring achieving method for segmentation capacitor liquid level sensor |
| CN110608786A (en) * | 2019-10-31 | 2019-12-24 | 上海雷奎流体科技有限公司 | A Conductivity Liquid Level Gauge |
-
1999
- 1999-07-15 CN CN 99228882 patent/CN2387520Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427898C (en) * | 2004-10-29 | 2008-10-22 | 日本特殊陶业株式会社 | Liquid state detecting sensor |
| CN100442027C (en) * | 2006-03-17 | 2008-12-10 | 英属盖曼群岛商胜光科技股份有限公司 | Liquid level detecting device method therefor |
| CN102012248A (en) * | 2010-12-20 | 2011-04-13 | 扬州汽车传感器工程技术研究所 | Capacitance type water level sensor |
| CN102012248B (en) * | 2010-12-20 | 2012-05-23 | 扬州汽车传感器工程技术研究所 | Capacitance type water level sensor |
| CN102680052A (en) * | 2012-05-10 | 2012-09-19 | 张家港市赛达机械有限公司 | Connecting structure of leading-out lead of capacitive low-temperature liquid level meter |
| CN103575360A (en) * | 2012-07-19 | 2014-02-12 | 北京航天试验技术研究所 | Circuit measuring achieving method for segmentation capacitor liquid level sensor |
| CN103575360B (en) * | 2012-07-19 | 2016-05-11 | 北京航天试验技术研究所 | Merogenesis capacitive liquid level sensor measuring circuit implementation method |
| CN110608786A (en) * | 2019-10-31 | 2019-12-24 | 上海雷奎流体科技有限公司 | A Conductivity Liquid Level Gauge |
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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 |