CN101373149B - Auxiliary electrode of capacitance object position sensor - Google Patents
Auxiliary electrode of capacitance object position sensor Download PDFInfo
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- CN101373149B CN101373149B CN2008101386901A CN200810138690A CN101373149B CN 101373149 B CN101373149 B CN 101373149B CN 2008101386901 A CN2008101386901 A CN 2008101386901A CN 200810138690 A CN200810138690 A CN 200810138690A CN 101373149 B CN101373149 B CN 101373149B
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- cable wire
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- auxiliary electrode
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Abstract
The invention relates to an assistant electrode of a capacitive level sensor, which comprises at least a flexible electric conductance tightwire, the length of which is equal to that of the main pole of the sensor, a plurality of insulator brackets made of non-conducting material, and a plurality of barrel-shaped or ring-shaped electrode units, wherein at least one of the two ends of each insulator bracket is fixed with the flexible electric conductance tightwire or the main pole through connecting terminals; a plurality of barrel-shaped or ring-shaped electrode units with or without insulator brackets are electrically connected together by at least a flexible electric conductance tightwire to integrally form a flexible assistant electrode. The assistant electrode has the beneficial effects that the structure is reasonable, installation and transportation are convenient, the signals of the capacitance measurement are highly enhanced, and the stability and the accuracy of the level measurement are increased. The assistant electrode is particularly suitable for being used as the flexible assistant electrode of various flexible level measuring sensors, the capacitance or the transadmittance of which serves as a measuring parameter.
Description
Technical field
The present invention relates to the modifying device to a measurement mechanism, specifically is that some are the auxiliary electrode of thing (liquid) position measuring sensor of measurement parameter with electric capacity or admittance.Especially the flexible auxiliary electrode of flexible measuring sensor.
Background technology
In thing (liquid) position measuring sensor that industrial circle is used always, it is to measure the utmost point with an electric conductor that gos deep in the feed bin (jar) as the master that a kind of measuring method commonly used is arranged, and is called for short main pole; Contain storehouse (jar) wall of electric conductor as another utmost point with conduction or inside, the thing of differing heights (liquid) material can influence the size of electric capacity, resistance or the admittance of the two poles of the earth formation between the two poles of the earth, by measuring the variable quantity of this electric capacity, resistance or admittance, just can detect the height of (jar) interior thing (liquid) position of delivering from godown, the measurement scheme that is provided as Chinese patent 00215270.3.But, under situation about having, because the horizontal span of feed bin (jar) is too big, make the distance of two interpolars long, the signal that causes electric capacity, resistance or the admittance of exporting too a little less than, be subjected to extraneous interference easily, influenced degree of stability and the accuracy measured, under the more approaching situation of the dielectric coefficient of tested material and hole capital after selling all securities (jar), this consequence is more serious.
Chinese patent 01243602.X and patent 02110211.2 disclose two kinds of level sensors that adapt to material of different nature, have the segmented electrode structure respectively, rely on electric capacity (or admittance) parameter that detects respectively between each segmented electrode and storehouse (jar) wall, improve the precision of level gauging.Because every segment electrode is shorter, electric capacity (or admittance) signal between itself and the bulkhead is littler, is more vulnerable to the influence of environmental fluctuating, and is therefore higher to the required distance between central electrode and storehouse (jar) wall, and distance will cause the level sensor cisco unity malfunction than greatly the time.
Purer at tested material, mobile better as finished fluid, under the less as situation of common fuel tank of tested batch can, U.S. Pat 005103368A has provided a kind of solution of the sectional capacitance sensor with the rigidity auxiliary electrode, can improve the precision of level gauging.But this scheme is relatively poor inapplicable as crude oil, powder etc. and the industrial various height of level gauging, big material bin (jar) of needing for flowability, does not have using value.On the one hand, mobile relatively poor material may be blocked between the two poles of the earth, and on the other hand, the outside continuous electrode of rigidity may be difficult to installation and transportation, and lose its using value because of too heavy.
Summary of the invention
Technical matters to be solved by this invention is in order to overcome above-mentioned the deficiencies in the prior art, providing a kind of adorns with the capacitance object position sensor companion, install, convenient transportation, can strengthen the auxiliary electrode of the capacitance object position sensor of above-mentioned capacitance type sensor measuring-signal.
The technical scheme that the present invention solves the problems of the technologies described above employing is:
A kind of auxiliary electrode of capacitance object position sensor, it comprises:
(1) at least one length is suitable with the length of companion's dress capacitance object position sensor main pole, has flexible conduction cable wire;
(2) several are used for the main pole of sensor and the conduction cable wire of described flexibility are kept apart equably along the direction of level gauging by the insulating support that non-conducting material is made; Have at least an end to fix in the two ends of insulating support by the conduction cable wire or the main pole of splicing ear and described flexibility.
The such auxiliary electrode of the present invention cooperates with the sensor main pole, and during the thing position of measuring media, the signal of acquisition obviously improves, and helps improving the accuracy and the stability of level gauging.
The present invention when being used to measure some particular mediums, as oil product etc., is to guarantee accuracy and the stability measured on the basis of such scheme, has set up:
(3) some tubulars or ring electrode unit, by at least one described compliant conductive cable wire with some tape insulation supports or not the tubular or the ring electrode unit of tape insulation support link together, form a flexible auxiliary electrode on the whole.Solve the problem that signal is not strong and cable wire is easy to tie a knot.
Said tubular electrode unit loop can be made of the mesh of rigidity or the conductive material of palisade around the sensor main pole in the such scheme of the present invention, does not have stroke basically; Also can being made of the conductive material of spring-like or flexible mesh-like, is the structure with retractility and flexibility.Employing has the tubular auxiliary electrode cellular construction of retractility and flexibility, can obtain further benefit: bigger retractility of whole auxiliary electrode and flexibility promptly are provided, provide bigger convenience for installing and transporting.
The present invention is owing to adopt flexible auxiliary electrode, itself and capacitance object position sensor companion adorn, by the distance that furthers on one's own initiative with the main pole of sensor, form two electrodes of capacitive transducer, against existing technologies, the present invention is rational in infrastructure, installation, convenient transportation, significantly improve the signal of measuring electric capacity, increased the degree of stability and the accuracy of its level gauging.Being specially adapted to do to some electric capacity or admittance is the flexible auxiliary electrode of various flexible thing (liquid) position measuring sensor of measurement parameter, no matter these survey sensors employings is the continuous coverage mode, or the sectional type metering system.
The present invention is under the condition of rigidity at the capacitance object position sensor main pole, a kind of other technical scheme also is provided, it is mainly reached by insulating support forms around the rigidity tubular electrode unit of sensor main pole, the tubular electrode unit is electrically connected as auxiliary electrode, the quantity of insulating support can be determined according to the quantity of tubular electrode, reduce as far as possible, limiting case is, only be one with the rigidity tubular electrode unit of main pole companion dress, its length equates substantially with main pole, and the insulating support that tubular electrode and main pole are kept apart is needed two at least.
Description of drawings
Describe the present invention below in conjunction with accompanying drawing:
Label among the figure is: 1. conduction cable wire, and 2. insulating support, 3. tubular electrode unit, 3 '. ring electrode unit, 4. sensor main pole, 5. splicing ear.
Fig. 1 is a kind of insulating support synoptic diagram of the present invention.
Fig. 2 is a kind of synoptic diagram that conducts electricity the embodiment that cable wire and sensor main pole keep apart by insulating support of the present invention.
Fig. 3 is the embodiment synoptic diagram that a kind of rigidity tubular electrode unit of the present invention is connected with the sensor main pole by conduction cable wire, insulating support.
Fig. 4 is the rigidity tubular electrode unit synoptic diagram among Fig. 3.
Fig. 5 is the embodiment synoptic diagram that the tubular electrode unit of a kind of spring-like of the present invention is connected with the sensor main pole by conduction cable wire, insulating support.
Fig. 6 is the spring-like tubular electrode cell schematics among Fig. 5.
Fig. 7 is the embodiment synoptic diagram that a kind of ring electrode of the present invention unit is connected with the sensor main pole by conduction cable wire, insulating support.
Fig. 8 is the synoptic diagram of a kind of rigidity tubular electrode unit of the present invention mutual embodiment that isolates on short transverse.
Fig. 9 is the embodiment synoptic diagram that the tubular electrode unit of the spring-like of a kind of simplification of the present invention is connected with the sensor main pole by conduction cable wire, insulating support.
Figure 10 is the embodiment synoptic diagram that the rigidity tubular electrode unit of a simplification of the present invention is connected with the sensor main pole by insulating support.
Embodiment
A kind of auxiliary electrode of capacitance object position sensor comprises:
(1) at least one length is suitable with the length of the capacitance object position sensor main pole 4 of companion's dress, has flexible conduction cable wire 1.Conduction cable wire 1 is generally two or three.
(2) several insulating supports 2 of being made by non-conducting material, structure as shown in Figure 1 is used for the sensor main pole 4 and the conduction cable wire 1 of described flexibility are kept apart equably along the direction of level gauging.Insulating support 2 will conduct electricity cable wire 1 or tubular electrode and level transducer main pole keeps apart.Have at least an end fixing with the conduction cable wire 1 or the sensor main pole 4 of described flexibility in the two ends of insulating support 2 by splicing ear 5.Structure as shown in Figure 2.
Sensor main pole 4 is with the thing position of conduction cable wire 1 auxiliary electrode conjunction measuring medium the time like this, and the signal of acquisition will obviously improve, and help improving the accuracy and the stability of level gauging.
When the present invention is used to measure the less medium of some signal specific with the above-mentioned level transducer that is made of sensor main pole 4 and conduction cable wire 1 auxiliary electrode, as oil product etc., because auxiliary electrode only is some simple conduction cable wires, signal between itself and the sensor main pole is too little, be not enough to guarantee accuracy and the stability measured, and, some isolated conduction cable wires, effectively do not limit, support, under the effect of liquid stream, be easy to knotting, distortion, be unfavorable for homogeneity and the stability measured.For this reason, the present invention is on the basis of aforementioned schemes, set up some around the sensor main pole tubular electrode unit 3 or ring electrode unit 3 ', with some tape insulation supports 2 or not the tubular electrode unit 3 of tape insulation support or ring electrode unit 3 ' link together, form a flexible auxiliary electrode by at least one described compliant conductive cable wire 1 on the whole.Like this, can solve the problem that signal is not strong and the conduction cable wire is easy to tie a knot.As Fig. 3, Fig. 5, Fig. 7, Fig. 8, shown in Figure 9.
Tubular electrode of the present invention unit 3 can be made of the mesh of rigidity or the conductive material of palisade, does not have stroke basically; Also can being made of the conductive material of spring-like or flexible mesh-like, is the structure with retractility and flexibility.
From Fig. 3, Fig. 4 as can be seen, in the present invention program, by at least one above-mentioned conduction cable wire 1 with some tape insulation supports 2 or not the rigidity tubular electrode unit 301 of tape insulation support link together, form a flexible auxiliary electrode on the whole, each rigidity tubular auxiliary electrode unit 301 can be made of the conductive material of mesh or palisade, as shown in Figure 4, be not have stroke substantially.In the tubular electrode unit is under the situation of rigidity, its with the conduction cable wire connected mode, both can adopt adjacent tubular electrode unit to be in contact with one another, the connected mode that supports each other, all tubular electrode unit are electrically connected with a common conduction cable wire at least by splicing ear 5, play and strengthen the effect that is electrically connected, as shown in Figure 3; One end of conduction cable wire is fixedlyed connected with the flange on top, the other end is fixedlyed connected with the tubular electrode unit of bottommost, with other tubular electrode unit of centre can be to fixedly connected, here saidly fixedly connectedly be meant that on splicing ear 5 and the conduction cable wire certain a bit is fixed together, and can not slide on conduction cable wire direction; Also can be to flexibly connect, here said flexible connection refers to that splicing ear 5 can slide in conduction cable wire direction, as conduct electricity cable wire 1 by the slip of the aperture on the splicing ear 5, form the tubular auxiliary electrode of a flexibility on the whole, can adopt the fit system of mortar head, mortar bowl at the tubular electrode two ends, to reduce rotary resistance to each other.Scheme as shown in Figure 3, Figure 4.
The present invention 3 is under the situation of rigidity in the tubular electrode unit, its with the conduction cable wire connected mode, can also adopt adjacent tubular electrode unit not to be in contact with one another each other, each tubular electrode unit 301, firmly be connected with at least two common conduction cable wires by splicing ear 5, rely on the conduction cable wire mutually positioning, rely on the space between the adjacent tubular electrode unit to provide flexible, the top of common conduction cable wire is connected with the ring flange on top, whole flexible auxiliary electrode is played a supporting role, as shown in Figure 8.
As can be seen, tubular electrode unit further of the present invention is made of the conductive material by spring-like or flexible mesh-like, is the structure with retractility and flexibility from Fig. 5, Fig. 6.Employing has the tubular electrode cellular construction of retractility and flexibility, can obtain further benefit: bigger retractility of whole auxiliary electrode and flexibility promptly are provided, provide bigger convenience for installing and transporting.In the tubular electrode unit for having under retractility and the flexible situation, the tubular electrode unit 302 of spring-like as shown in Figure 6, it conducts electricity the connected mode of cable wire with being connected, and both can adopt between the adjacent tubular electrode unit 302 to be in contact with one another, as shown in Figure 5; Also can adopt the mode that keeps a fixed gap between the adjacent tubular electrode unit 302, be to have in the solution of flexible auxiliary electrode of level transducer of retractility and flexible structure for above-mentioned tubular electrode unit further, can also be reduced to a barrel on the whole and constitute, as shown in Figure 9 by flexibility or springiness material.The upper end edge of electrode and lower end edge are respectively by at least two splicing ears 5, fixedly connected with at least one cable wire, the length of entire electrode relies on the rope length that connects to determine when launching formal the application, in order to keep the homogeneity of entire electrode, between the upper end edge and lower end edge of tubular electrode, at the differing heights of tubular electrode, will fixedly connected with the cable wire of relevant position by splicing ear spring 5 respectively, thereby reach the effect that the spring-like barrel is positioned.Its common feature is, upper edge and lower edge with tubular electrode unit of retractility are passed through at least two splicing ears respectively, fixedly connected with at least two cable wires, when launching formal the application, each tubular electrode unit limits the position of tubular electrode unit by the position of splicing ear 5 on cable wire.The length of flexible tubular electrode unit positions by the direction of connected conduction cable wire along level gauging when normal the use.
In the scheme that the above-mentioned tubular electrode unit by adjacent is not in contact with one another each other, we can turn to the electrode unit of each tubular a simple ring, structure as shown in Figure 7 further in the present invention.Fig. 7 be a kind of ring electrode of the present invention unit 3 ', an embodiment synoptic diagram that is connected with the sensor main pole by conduction cable wire, insulating support.
The present invention is for rigidity sensor main pole, and its needed subsidiary electrode does not need special flexible design, so the conduction cable wire 1 that plays fixing and supporting role not necessarily; Only need to use insulating support 2 that sensor main pole 4 is separated with one or several tubular electrode unit 303 around the sensor main pole and get final product, one or several tubular electrode unit 303 length overalls and sensor main pole are basic identical.As shown in figure 10, embodiment has provided by a tubular electrode 303 and two rigidity auxiliary electrode schemes that support is formed.
More than be not limit to the detailed description of the embodiment of the invention, the present invention should not be restricted to above disclosed precise forms.Those skilled in the art will appreciate that within the scope of the invention, can carry out various modifications that are equal to and replacement, such modification and replacement should be considered as being contained by this invention.In addition, also can be applicable to other field in the principle of the present invention that this provided, is sensor and need not be confined to capacitance object (liquid).The element of above-mentioned each embodiment can be combined together, so that further embodiment is provided.
In addition, should or not limit the invention to disclosed specific embodiment in this explanation, unless above detailed description clearly defines this term with the explaination of the term that uses in the claims.Therefore, actual range of the present invention all equivalents that should contain described embodiment and implement according to claim.
Claims (3)
1. the auxiliary electrode of a capacitance object position sensor, it is characterized in that: it comprises
(1) at least one length is suitable with the length of companion's dress capacitance object position sensor main pole, has flexible conduction cable wire;
(2) several are used for the conduction cable wire of sensor main pole and described flexibility is kept apart along the direction of level gauging by the insulating support that non-conducting material is made; Have at least an end to fix in the two ends of insulating support by the conduction cable wire or the sensor main pole of splicing ear and described flexibility;
(3) some tape insulation supports or the not tubular or the ring electrode unit of tape insulation support, by at least one described compliant conductive cable wire with some tape insulation supports or not the tubular or the ring electrode unit of tape insulation support be electrically connected, form flexible auxiliary electrode on the whole.
2. the auxiliary electrode of capacitance object position sensor according to claim 1, it is characterized in that: the tubular electrode unit is made of the mesh of rigidity or the conductive material of palisade, adjacent tubular electrode unit relies on the flexible connection of conduction cable wire or the space that relies on the conduction cable wire to be provided for adjacent tubular electrode unit and produces the whole needed flexibility of auxiliary electrode, all tubular electrode unit are electrically connected with the conduction cable wire, constitute a flexible auxiliary electrode on the whole.
3. the auxiliary electrode of capacitance object position sensor according to claim 1, it is characterized in that: the tubular electrode unit is made of the spring-like of flexibility or the conductive material of mesh-like, have retractility and flexibility structure, all tubular electrode unit are electrically connected with the conduction cable wire, constitute a flexible auxiliary electrode on the whole.
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| CN2008101386901A CN101373149B (en) | 2008-07-29 | 2008-07-29 | Auxiliary electrode of capacitance object position sensor |
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| CN2008101386901A CN101373149B (en) | 2008-07-29 | 2008-07-29 | Auxiliary electrode of capacitance object position sensor |
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| CN101373149B true CN101373149B (en) | 2010-07-21 |
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| CN101907478B (en) * | 2010-07-30 | 2012-05-30 | 威海海和科技有限责任公司 | Capacitance type continuous material level sensor |
| CN102818605A (en) * | 2012-02-25 | 2012-12-12 | 威海海和科技有限责任公司 | High-temperature and high-voltage resistance subsection capacitive level transmitter |
| CN105371920A (en) * | 2015-12-15 | 2016-03-02 | 江南大学 | Air bag type material level detection device |
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| CN201225914Y (en) * | 2008-07-29 | 2009-04-22 | 威海海和科技有限责任公司 | Auxiliary electrode for capacitance type object location sensor |
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