CN1091250C - Continuous capacitance sensor - Google Patents
Continuous capacitance sensor Download PDFInfo
- Publication number
- CN1091250C CN1091250C CN 98110100 CN98110100A CN1091250C CN 1091250 C CN1091250 C CN 1091250C CN 98110100 CN98110100 CN 98110100 CN 98110100 A CN98110100 A CN 98110100A CN 1091250 C CN1091250 C CN 1091250C
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- main pole
- sensor
- capacitance sensor
- continuous capacitance
- continuous
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention relates to a continuous capacitance sensor. A metal main pole is arranged on the continuous capacitance sensor. A flange which is fixedly used is arranged on the upper end of the main pole, and a capacitance transmitter is arranged on the upper part of the flange. A stock bin of the main pole is insulated. Scaling electrodes are arranged at a plurality of determined heights of the external side of the metal main pole in the stock bin and are respectively connected with the transmitter through cables arranged in the main pole. The sensor realizes sectional scaling with scaling electrodes, which enhances the measure precision of a capacitance sensor. The sensor has the advantages of simple structure, low cost and high capacity of shock resistance, the measure precision can meet the requirement for a material level measure of a coal bin, a stone bin, etc., and the sensor is particularly suitable for being used under bad environment conditions.
Description
Technical field
The present invention relates to a kind of measurement mechanism, specifically a kind of continuous capacitance sensor.
Background technology
We know, for solid material in the specific feed bin (powdery or bulk) amount what, utilizing the capacitive transducer measurement is one of more convenient at present, practical means.Traditional capacitive transducer is a kind of continuous capacitance sensor, promptly with the bulkhead of feed bin as a utmost point, make another utmost point to stretch into a metal electrode that is parallel to direction of measurement in the storehouse from Cang Ding, constitute one group and become the dielectric capacitance sensor, the variation of the capacitance signal by measuring the output of this capacitive transducer transmitter, the variation that can measure material level in the storehouse.During use, this survey sensor need adopt the alternate manner calibration, and difficulty is bigger; Simultaneously, because composition, moisture content, temperature, the granular physical parameter of material constantly change in the storehouse, original scaling point is no longer suitable, causes measurement result to be drifted about, and it is no longer accurate to measure.This measuring method can not satisfy the needs of user to level gauging eventually through transforming repeatedly.In order to address the above problem, patent 91108963.2,94100133.4 has been introduced respectively and has severally been constituted the sectional capacitance sensor with insulated from each other, series arrangement, the set of segment electrodes and the bulkhead that are fixed together with suitable mode; Patent 89219440.5,94240007.0 has also proposed several sectional capacitance sensors, and the two poles of the earth of its each set of segmentation capacitive transducer provide by sensor self, is not related with the bulkhead of tested feed bin.Above-mentioned patent solves the scaling point problem by the continuous capacitance section, has reduced the influence of the change of properties of the accumulation of error and tested material to measurement structure, has improved measuring accuracy.But the project organization of section is complicated, and cost is higher, relatively poor, the narrow application range of shock resistance.
Summary of the invention
Technical problem to be solved in the utility model is to overcome existing continuous capacitance sensor to measure inaccurate and above-mentioned material level sectional capacitance sensor construction complexity, deficiency that cost is high, provide a kind of simple in structure, cost is low, strong shock resistance is measured the continuous electric capacity sensor with enough accuracy.
The technical scheme in the invention for solving the above technical problem is: a kind of continuous capacitance sensor, it establishes a metal main pole, the main pole upper end is provided with the fixing ring flange of using, ring flange top is provided with capacitive pick-up, main pole is fixing with ring flange and feed bin insulation by insulating mat, main pole and feed bin bulkhead are respectively a utmost point, constitute and become the medium continuous capacitance, it is characterized in that very tubular structure of master metal, the main pole outside is some in the storehouse determines highly to be provided with the calibration electrode, and it is connected with transmitter by the cable that is arranged in the main pole pipe respectively, and the calibration electrode is an electrode terminal, be provided with insulation spacer between itself and the main pole, and enrich space between the two by insulation spacer.
The present invention determines the calibration electrode of height and the two poles of the earth that the metal main pole forms calibration electric capacity, by judging the size of this calibration electric capacity, can determine whether the material in the storehouse arrives this this scaling point, after judging that material reaches certain and determines height, the continuous capacitance value that is available this section height is calibrated, significantly reduced accumulated error, in time avoided the adverse effect of material physical factor variation measuring.The present invention only judges having or not of material with the calibration electrode, do not carry out quantitative measurment, so the said calibration electrode of the present invention can select enough fewly, can be electrode terminal as it, be provided with insulation spacer between itself and the main pole, insulation spacer is full of the space between main pole and the calibration electrode.Having avoided folder powder phenomenon, improved impact resistance, is a kind of desirable subsection calibration continuous capacitance sensor.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further;
Fig. 1 is a structural representation of the present invention.
Embodiment
As can be seen from Figure 1, a kind of continuous capacitance sensor, it is provided with a metal main pole 1, it is a tubular structure, its upper end is provided with fixing with ring flange 2, ring flange top is provided with capacitive pick-up 3, and main pole 1 is fixing by insulating mat 4 usefulness ring flanges 2 and feed bin insulation, and main pole and feed bin bulkhead (the earth) are the two poles of the earth that become the medium continuous capacitance.The some definite calibration electrodes 5 that highly are provided with in main pole 1 outside are provided with insulation spacer 6 between main pole 1 and the calibration electrode 5, and enrich its space at interval by insulation spacer.Each calibration electrode 5 is connected with transmitter 3 by the cable 7 that is arranged in the main pole pipe, thus the capacitance signal between output calibration electrode and the main pole.
The present invention calibrates the selection of electrode number and can decide according to the height of tested material feed bin, and a calibration electrode is set between general every 1-6 rice height, and it preferably is located at the bottom of being responsible for joint flange 8, impacts to reduce material.Judge whether material arrives this point, does not carry out quantitative measurment, and it can select enough for a short time owing to only form electric capacity, make it be reduced to negligible degree the influence of the electric capacity between the person in charge and bulkhead with the calibration electrode.Therefore, it is electrode terminal that the present invention calibrates electrode, is provided with insulation spacer between itself and charge electrode, has reduced the impact of material to electrode, and has avoided the material folding phenomenon.
The course of work of the present invention is such, along with material add put in storage in, it highly progressively improves, do not flood as yet when determining height A 1 at material, variator changes by the capacitance signal of measuring continuous capacitance output, compare with the last signal of its record, determined that promptly the thing position is at the height that is lower than the A1 part, after flooding definite height A 1, material (judges) by the calibration capacitance signal, the continuous capacitance value m1 of the rapid logging machine 0-A1 of transmitter section full with substance, with this value the A1-A2 section is calibrated, the continuous capacitance value m1 of the continuous capacitance value that records and definite height A 1 relatively just can determine the height of materials between A1-A2, equally between A2-A3, continuous capacitance value m2 with the continuous capacitance value that records and definite height A 2 compares, and can determine the height of materials between A2-A3 more exactly, and the like.Subsection calibration has significantly reduced accumulated error like this, is responsible for the areal survey of having realized material by a metal, has improved the precision of measuring greatly, has overcome sectional capacitance sensor construction complexity in the past, the deficiency that cost is high.
The present invention is simple in structure, cost is low, strong shock resistance, and measuring accuracy can satisfy coal bunker, building stones storehouse etc. to the material Testing requirement, is particularly suitable for using under the environment mal-condition.
Claims (1)
1, a kind of continuous capacitance sensor, it establishes a metal main pole, the main pole upper end is provided with the fixing ring flange of using, ring flange top is provided with capacitive pick-up, main pole is fixing with ring flange and feed bin insulation by insulating mat, main pole and feed bin bulkhead are respectively a utmost point, constitute and become the medium continuous capacitance, it is characterized in that very tubular structure of master metal, the main pole outside is some in the storehouse determines highly to be provided with the calibration electrode, and it is connected with transmitter by the cable that is arranged in the main pole pipe respectively, and the calibration electrode is an electrode terminal, be provided with insulation spacer between itself and the main pole, and enrich space between the two by insulation spacer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110100 CN1091250C (en) | 1998-03-09 | 1998-03-09 | Continuous capacitance sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110100 CN1091250C (en) | 1998-03-09 | 1998-03-09 | Continuous capacitance sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1228530A CN1228530A (en) | 1999-09-15 |
| CN1091250C true CN1091250C (en) | 2002-09-18 |
Family
ID=5220181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98110100 Expired - Fee Related CN1091250C (en) | 1998-03-09 | 1998-03-09 | Continuous capacitance sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1091250C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3495300A (en) * | 1999-02-22 | 2000-09-14 | Procter & Gamble Company, The | Fibrous matrix for absorbing fats and oils |
| CN102235904A (en) * | 2010-04-28 | 2011-11-09 | 苏州工业园区易辰电子系统有限公司 | Digital calibration liquid level sensing device |
| CN102959391B (en) * | 2011-03-28 | 2014-10-29 | 威海海和科技有限责任公司 | Electrode structure and apparatus for use in measuring oil-water constituents |
| CN105784062B (en) * | 2016-04-13 | 2018-11-06 | 辽宁科技大学 | The detection method and device of level height in a kind of material bin |
| CN106092260B (en) * | 2016-06-06 | 2019-02-19 | 哈尔滨研拓科技发展有限公司 | A kind of high-precision discrete type capacitance level transducer |
| CN109328620B (en) * | 2018-09-19 | 2020-04-24 | 农业部南京农业机械化研究所 | Real-time yield measurement system and method of grain combine harvester |
-
1998
- 1998-03-09 CN CN 98110100 patent/CN1091250C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1228530A (en) | 1999-09-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AR01 | Abandonment of patent right to avoid double patenting |
According to article 9 of the patent law and article 13 of the detailed rules for the implementation of the patent law: 98110100.3 of the invention patents in the current issue of authorization announcement, and at the same time corresponding to the 98220043.9 utility model patent to be given up, and in the 18 volume of the 38 issue of the new type of communique on the patent right to abandon the announcement. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |