CN1214450A - Material level sensor - Google Patents
Material level sensor Download PDFInfo
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- CN1214450A CN1214450A CN 97106145 CN97106145A CN1214450A CN 1214450 A CN1214450 A CN 1214450A CN 97106145 CN97106145 CN 97106145 CN 97106145 A CN97106145 A CN 97106145A CN 1214450 A CN1214450 A CN 1214450A
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- metal
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- level sensor
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Abstract
The material level sensor has a main metal pipe, fixing flange on the main pipe, several metal sub-electrodes arranged in certain intervals, below the flange and along the main pipe, shielded cables connected to the sub-electrodes and the transducers on the main pipe and mounted inside the main pipe, insulating spacers between the main pipe and the sub-electrodes. The present invention can realize sectional continuous measurement in high accuracy, and has simple structure and no movable part and is easy-to-install, without powder material carrying during use and suitable for measurement of material level in various environment.
Description
The present invention relates to a kind of surveying instrument.Specifically a kind of level sensor.
We know, and are present.Multiple apparatus for measuring charge level is arranged both at home and abroad.With material in the feed bin is dielectric, utilizes capacitance type sensor to realize that detection to material in the high aniseed storehouse is one of more convenient at present, practical means.Patent 91108963.2 and 94100133.4 has been introduced two kinds of sectional capacitance sensors that constitute with the bulkhead of segmented electrode insulated from each other, that be fixed together with suitable series arrangement and tested feed bin respectively, this structure is because with the utmost point of bulkhead as its measurement, measurement result directly is subjected to shape, the size of each tested feed bin, factor affecting such as the installation site of sensor, sensor in the storehouse along with moving of material when the position changes, uncertain variation also takes place in measurement result thereupon, and tangible deficiency is arranged on the performance; The sectional capacitance sensor of formula that patent 89219440.5 has been introduced a kind of " string sugarcoated haws ", it comprises a metal elongated tubular, the fixedly ring flange of usefulness is equipped with in the upper end, be with some groups of emitter tubes, receiving pole tube and shielding cylinder and bakelite on the metal tube, adjacent emitter tube and receiving pole tube are formed sectional capacitance one by one, the sectional capacitance sensor of this structure, for each group electric capacity, controlling level is the complicated function of electric capacity.Especially like this, measuring accuracy is difficult to satisfy user's requirement under the uneven situation of tested material; Patent 94240067.0 and 95234563.3 has been introduced several tubular type level sensors, and it is responsible for as electric capacity with metal and concentrates the utmost point, and its upper end is provided with the fixedly ring flange of usefulness.Metal is responsible for outside differing heights and is connected with some groups of tubular metal split poles by insulated terminal, constitute a variable dielectric formula sectional capacitance between the every component utmost point and the concentrated utmost point, the height of material is directly proportional with the capacitance signal of its output, as long as therefore detect this section electric capacity output valve, just can determine the height of material, the not isoparametric influence of receiver bin structure.But since said structure detect be metal be responsible for and the tubulose split pole between parameter of materials, and the gap that metal is responsible between the concentrated utmost point and the split pole is subjected to limitation of field condition, can not be too big, therefore, when the tested material particle is bigger, or humidity is bigger, when perhaps adhesion is strong, just the material folding phenomenon be may cause, thereby the testing result and the operate as normal of detector influenced.
Purpose of the present invention is exactly in order to overcome the deficiency of above-mentioned various level sensors, a kind of simple in structure, easy for installation, influence of not being subjected to installation environment is provided, no movable member, shock-resistant, do not press from both sides powder, can carry out the segmentation continuous coverage, the level sensor that measuring accuracy is high.
For achieving the above object, the present invention is a kind of level sensor, it is provided with a metal and is responsible for, be responsible for top and be provided with the fixing ring flange of using, be responsible at a certain distance along metal below the ring flange that series arrangement is provided with some groups of metal split poles, the shielded cable that is connected with each split pole is contained in the person in charge, and it links to each other with transmitter on being responsible for, it is characterized in that being provided with insulation spacer between the metal person in charge and each split pole, insulation spacer is full of the space of easy material folding between the person in charge and each split pole.
The present invention is responsible for the concentrated utmost point of doing electric capacity with metal, be responsible for the part of concentrating the utmost point and as easy as rolling off a log material folding of each minute and be insulated the pad filling, the material medium can only the part beyond pad change, influence the capacitance signal of each set of segmentation electric capacity from the side, this capacitance signal is directly proportional with the height of materials that floods this section electric capacity, the not influence of the installation site of receiver bin structure and sensor, and it is simple in structure, the powder phenomenon can not appear pressing from both sides, the measuring accuracy height.
The present invention will be further described below in conjunction with accompanying drawing:
Fig. 1 is a structural representation of the present invention.
As can be seen from Figure, a kind of level sensor, it is done metal with stainless-steel tube and is responsible for 1, and its reality also is the concentrated utmost point of all electric capacity, the top that metal is responsible for is provided with fixing with ring flange 3 and capacitance signal transmitter 2, and ring flange 3 is used for the person in charge is fixed on material bin or material tank deck.In the bottom of ring flange 3, along metal be responsible for 1 at a certain distance series arrangement be provided with the fractions utmost point 4.Split pole 4 can be metal plate-like, also can be tubular metal or bar-shaped, and split pole of the present invention is processed by stainless-steel tube.Be responsible for to be provided with respectively the shielded cable 5 that extremely links to each other with each component etc. in 1, above-mentioned technology belongs to prior art, and this does not describe in detail.Metal of the present invention is responsible for and can be only established one group of metal tube split pole outward, is used for spot measurement, and that judges material has or does not have, also can organize be set more by the feed bin requirement for height.Every component utmost point can adopt the monometallic tubular construction, also can adopt the multitube structure, and they are connected in parallel.The every component of this sensor is double pipe structure very, they be connected in parallel metal be responsible on the corresponding shielded cable, symmetry is laid in two of sustained height that metal is responsible for, the two adjacent component utmost points are responsible for 1 vertical quadrature along metal, promptly vertically stagger mutually 90 to spend.
The present invention is the deficiency that overcomes easy material folding between the past metal person in charge 1 and each split pole, is provided with insulation spacer between the metal person in charge 1 and each split pole, and insulation spacer 6 is full of the space between the person in charge 1 and each split pole 3.Insulation spacer 6 of the present invention is parallel with the person in charge, is fixed between the person in charge and each split pole.Insulation spacer 6 adopts high temperature resistance, and is corrosion-resistant, and has the insulating material processing of certain intensity, as processing with polytetrafluoroethylmaterial material.Its inside can be provided with cavity, with the reduction material cost, and the influence of minimizing to surveying.Insulation spacer rises on the one hand concentrates the utmost point and split pole insulating effect, and main is the space of filling easy material folding, stops to be responsible for and concentrates material folding between the utmost point and the split pole, guarantees the measuring accuracy of sensor.Metal of the present invention be responsible for and each split pole over against part be insulated pad 5 fully and occupy, the material medium can only the part beyond pad change, and influences the capacitance signal of each set of segmentation electric capacity from the side.The capacitance signal that is obtained is directly proportional with the height of materials of this section electric capacity that floods.Each is organized capacitance signal and by the transmitter on top capacitance signal is converted to position signalling by cable, thereby finishes the sensing measurement of height of materials position.
The present invention is for improving impact resistance, and convenient transportation and installation also are provided with universal movable joint 7 and middle loose-leaf flange 8 on metal is responsible for, and they have done description in patent 94235991.7, and this does not describe in detail.
The present invention can realize the segmentation continuous coverage, the measuring accuracy height, and it is simple in structure, and no movable member installs and fixes conveniently, uses and does not have the folder powder, is widely applicable for the material position measurement under the various environment.
Claims (4)
1, a kind of level sensor, it is provided with a metal and is responsible for, be responsible for top and be provided with the fixing ring flange of using, being responsible at a certain distance along metal below the ring flange, series arrangement is provided with some groups of metal split poles, the shielded cable that is connected with each split pole is contained in the person in charge, it links to each other with transmitter on being responsible for, it is characterized in that metal is responsible for and each split pole between be provided with insulation spacer, insulation spacer is full of the space between the person in charge and each split pole.
2, level sensor as claimed in claim 1 is characterized in that said insulation spacer is parallel with the person in charge, is fixed between the person in charge and each split pole.
3, level sensor as claimed in claim 1 is characterized in that said insulation spacer inside is provided with cavity.
4, level sensor as claimed in claim 1 is characterized in that only establishing one group of metal tube split pole outside the said metal person in charge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97106145 CN1214450A (en) | 1997-10-14 | 1997-10-14 | Material level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97106145 CN1214450A (en) | 1997-10-14 | 1997-10-14 | Material level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1214450A true CN1214450A (en) | 1999-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97106145 Pending CN1214450A (en) | 1997-10-14 | 1997-10-14 | Material level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1214450A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579942A (en) * | 2018-12-27 | 2019-04-05 | 安徽博微长安电子有限公司 | Detect the capacitance sensor of foodstuff drying device material position |
-
1997
- 1997-10-14 CN CN 97106145 patent/CN1214450A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579942A (en) * | 2018-12-27 | 2019-04-05 | 安徽博微长安电子有限公司 | Detect the capacitance sensor of foodstuff drying device material position |
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