CN2480819Y - Point poistion capacitance type material instrument with auliliary electrode - Google Patents
Point poistion capacitance type material instrument with auliliary electrode Download PDFInfo
- Publication number
- CN2480819Y CN2480819Y CN 01243603 CN01243603U CN2480819Y CN 2480819 Y CN2480819 Y CN 2480819Y CN 01243603 CN01243603 CN 01243603 CN 01243603 U CN01243603 U CN 01243603U CN 2480819 Y CN2480819 Y CN 2480819Y
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- electrode
- utility
- detecting electrode
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- detecting
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- Expired - Lifetime
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model relates to a point position capacitance material instrument with an auxiliary electrode, which comprises a flange, a strut and a capacitive transducer, and the instrument is characterized in that the flange is connected with one end of a metal detecting electrode through an insulating part, and a metal screen electrode is arranged on a circulating detecting electrode through the insulating part, and the flange is provided with the auxiliary electrode and a detecting electrode side by side. The utility model causes an electrode and a screen layer as equal potential by electricity method, and the utility model is capable of eliminating the effects caused by a shunt capacitance and a hanging powder, and determining the height of the materials by measuring the variations in capacitance between the detecting electrode and the auxiliary electrode, thereby improving the measurement accuracy.
Description
The utility model relates to a kind of measuring instrument, specifically a kind of position capacitive transducer.
We know, for granular material amount in the specific feed bin what, utilizing the capacitive transducer measurement is one of more convenient at present, practical means.ZL00215269.x discloses a kind of position capacitive transducer, its technical characterstic is that sensor head is made up of a plurality of tubular metal main poles and split pole, be provided with insulation course between main pole and the split pole, each main pole and adjacent one group of capacitive transducer of two split poles (earthing pole) formation, two groups (comprising two groups), above capacitive transducer constituted a sensor head, and every group of capacitive transducer cable by separately respectively links to each other with capacitive pick-up.Though this level sensor has solved the inaccurate problem of measurement result that causes because of bridging to a certain extent, but still has certain measuring errors.Condenser type point position instrument is to use fill level measuring device more widely at present, the metal electrode that it stretches in the tested feed bin is a utmost point, with the bulkhead of tested feed bin is a utmost point in addition, by detecting the capacitance signal size that forms between two electrodes, determine that the level-sensing device present position has or not material, because metal electrode just is installed in a side of feed bin, is installed on the bulkhead by ring flange, stray capacitance between electrode and the bulkhead and the extension powder on the electrode have bigger influence to measuring accuracy.
The purpose of this utility model is exactly in order to overcome above-mentioned the deficiencies in the prior art, provides a kind of simple structure, the some position condenser type material instrument that measuring accuracy is high.
For achieving the above object, the utility model can be realized by following measure: it is provided with ring flange, pole, capacitive pick-up, its technical characterstic is that ring flange is connected with an end of metal detection electrode through insulating part, be provided with the metallic shield electrode around detecting electrode through insulating part, ring flange is provided with the auxiliary electrode that parallels with detecting electrode.
The utility model also can be realized by following measure: detecting electrode links to each other with capacitive pick-up through cable respectively with guarded electrode.
The utility model makes electrode and screen layer equipotential by electrical method, the influence that can eliminate stray capacitance to greatest extent and hang powder, determine the height of material by the capacitance change of measuring between detecting electrode and the auxiliary electrode, thereby improved the precision of measuring.
The utility model will be further described below in conjunction with accompanying drawing:
Fig. 1 is a structural representation of the present utility model.
As can be seen from Figure 1, the utility model tubular struts 8 two ends are fixed with capacitive pick-up 1 and ring flange 2 respectively, one end of cylindrical metal detecting electrode 6 is fixed on the ring flange 2 through insulating part 5, and with ring flange 2 insulation, be provided with tubular shielding electrode 4 around detecting electrode 6, be insulating part 5 between detecting electrode 6 and the guarded electrode 4, be with insulating part 3 on the guarded electrode 4, and it is guarded electrode 4 is fixing with ring flange 2 through this insulating part 3, bar-shaped auxiliary electrode 7 also is installed on the ring flange 2, auxiliary electrode 7 can be one, also can be many, auxiliary electrode 7 and detecting electrode 6 side by side, the two keeps the distance greater than 10mm, detecting electrode 6 joins through cable and capacitive pick-up 1 respectively with guarded electrode 4.When the utility model uses, method by electricity is with detecting electrode 6 and guarded electrode 4 equipotentials, thereby can eliminate stray capacitance to greatest extent and hang the influence of powder measurement result, distance between detecting electrode 6 and the auxiliary electrode 7 is the safe distance that tested material character is determined, guarantees that it is unlikely bridging to occur.The utility model is by detecting the capacitance signal variation delta C1 between metal detection electrode 6 and the bin wall, be converted into the capacitance signal variation delta C2 that detects between metal detection electrode 6 and the auxiliary electrode 7, because the distance between detecting electrode 6 and the auxiliary electrode 7 is less than the distance between detecting electrode 6 and the bulkhead, so Δ C2 is much larger than Δ C1, thereby reduced the difficulty of measuring, improved the reliability that detects; Δ C2 is not subjected to the influence of other factors in the storehouse (feed bin structure, built-in article) basically simultaneously, so, got rid of the influence of testing environment basically to testing result.In addition, because detecting electrode 6 is with in auxiliary electrode 7 is arranged on a relative small range, can be arranged to specific structure according to the needs of measuring, as: level or alternate manner, do not resemble and to involve very big material scope the original structure, therefore, can improve the precision of check point greatly, realize some position measurement truly.
Claims (2)
1, a kind of some position condenser type material instrument with auxiliary electrode, it is provided with ring flange, pole, capacitive pick-up, it is characterized in that ring flange is connected with an end of metal detection electrode through insulating part, be provided with the metallic shield electrode around detecting electrode through insulating part, ring flange is provided with detecting electrode and is provided with auxiliary electrode side by side.
2,, it is characterized in that said detecting electrode links to each other with capacitive pick-up through cable respectively with guarded electrode according to the some position condenser type material instrument of the described auxiliary electrode of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01243603 CN2480819Y (en) | 2001-06-20 | 2001-06-20 | Point poistion capacitance type material instrument with auliliary electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01243603 CN2480819Y (en) | 2001-06-20 | 2001-06-20 | Point poistion capacitance type material instrument with auliliary electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2480819Y true CN2480819Y (en) | 2002-03-06 |
Family
ID=33655183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01243603 Expired - Lifetime CN2480819Y (en) | 2001-06-20 | 2001-06-20 | Point poistion capacitance type material instrument with auliliary electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2480819Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907478A (en) * | 2010-07-30 | 2010-12-08 | 威海海和科技有限责任公司 | Capacitance type continuous material level sensor |
| CN102353857A (en) * | 2011-07-05 | 2012-02-15 | 苏州索拉科技有限公司 | Electric signal detection system |
-
2001
- 2001-06-20 CN CN 01243603 patent/CN2480819Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907478A (en) * | 2010-07-30 | 2010-12-08 | 威海海和科技有限责任公司 | Capacitance type continuous material level sensor |
| CN102353857A (en) * | 2011-07-05 | 2012-02-15 | 苏州索拉科技有限公司 | Electric signal detection system |
| CN102353857B (en) * | 2011-07-05 | 2013-09-18 | 苏州索拉科技有限公司 | Electric signal detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: WEIHAI HAIHE TECHNOLOGY CO., LTD. Free format text: FORMER NAME OR ADDRESS: INSTRUMENT DIVISION, BEIYANG ELECTRIC GROUP CO., LTD., WEIHAI |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Haihe Science &. Technology Co., Ltd., Weihai Patentee before: Instrument Division, Beiyang Electric Group Co., Ltd., Weihai |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110620 Granted publication date: 20020306 |