CN102496433B - Electronic potentiometer and calibration method thereof - Google Patents
Electronic potentiometer and calibration method thereof Download PDFInfo
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- CN102496433B CN102496433B CN201110376846.1A CN201110376846A CN102496433B CN 102496433 B CN102496433 B CN 102496433B CN 201110376846 A CN201110376846 A CN 201110376846A CN 102496433 B CN102496433 B CN 102496433B
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Abstract
The invention discloses an electronic potentiometer and a calibration method thereof. A noncontact potentiometer comprises a coil and a magnetic conductive sheet. A bracing frame passes through an inner cavity of the coil; the magnetic conductive sheet is fixed on the bracing frame; the bracing frame can drive the magnetic conductive sheet to move in the inner cavity of the coil; the bracing frame is in a ''C'' shape and is provided with a ''C'' shape magnetic conductive sheet installation groove on an upper end thereof; and the magnetic conductive sheet is inserted and fixed in the magnetic conductive sheet installation groove and is a ribbon with a width changed from large to small. A calibration method of the noncontact potentiometer comprises steps of: measurement, adjustment, calibration and assembly. According to the invention, adjustment of variable inductance parameters are realized through arrangement of the bracing frame and change of a physical structure of the magnetic conductive sheet, so as to simplify processing algorithm in a subsequent circuit, easily realize detection circuit and facilitate installation and debug of a sensor. The potentiometer calibration method provided by the invention is simple and novel and has characteristics of convenience, fastness and high precision, etc.
Description
Technical field
The present invention relates to sensor technology, specifically, is a kind of electronic potentiometer and calibration steps thereof.
Background technology
Potentiometer be there are three exits, resistive element that resistance can regulate by certain Changing Pattern.It is made up of resistive element and moveable brush or sliding system usually, when brush moves along resistive element, namely obtains the resistance value or voltage that become certain relation with displacement at output.Namely between two fixing electric shocks of resistive element, when an additional voltage, by rotating or the sliding system change position of contact on resistive element, between moving contact with fixed contact, one becomes certain relation with moving contact position voltage can just be obtained.The potentiometer of current use is generally galvanically potentiometer, is made up of resistive film and contact, directly regulates the position that contact is residing on resistive film, the size of adjustable resistance, thus the height of adjustment current potential.Because frequent between contact with resistive film contacts and direct friction, cause wearing and tearing and the scratch of resistive film, make the potentiometer life-span not long.At present mainly by increasing conductive protection device between resistive film and contact, protective resistance film or contact are come to the improvement of potentiometer; thus reach and extend the object in potentiometer life-span, but fundamentally solve the problem that potentiometer causes the life-span not grow because of frictionally damage.
China Patent No. is 98212193.8, name is called that the utility model patent of " inductance type liquid level sensor " discloses a kind of electromagnetic sensor of slope shape iron core, be characterized in the change by iron core relative conductivity in coil, realize the detection of change in displacement, mention in its specification: no matter core configuration is circular cone, round platform, pyramid, terrace with edge etc., and linearly correct by revising iron core, but no matter in specification, which kind of iron core is proposed, all there is rigidity knot stronger, the feature that cost is higher, to revise iron core, it can only be the gradient of polishing iron core entirety, as specification sayed, the gradient of iron core entirety is consistent, its linear effects is subject to the limitation of the iron core gradient, implement difficulty very large, so almost do not see the figure of this technical scheme in present electromagnetic sensor.
China Patent No. is 02217324.2, name is called that the utility model patent of " non-contact point potentiometer " discloses a kind of non-contact point potentiometer, it is made up of sensor-based system and circuit analysis converting system, its sensor-based system is made up of induction coil and inductor, induction coil is a solenoid coil, inductor is a magnetic conductor, and inductor is near induction coil, and the relative position between inductor and induction coil can handle movement.This utility model patent reaches by relative position between adjustment inductor and induction coil the object adjusting current potential, and it is a kind of potentiometer without wearing and tearing, is applicable to the industry such as motor, electric sewing machine needing frequent speed governing.But this utility model has following deficiency: although first is the wear problem solving potentiometer, and the transducer adopting variable inductance principle to make has been applied in increasing field, its major function transfers various physical characteristic to electrology characteristic, thus realize the automatic detection of various parameter, but this patented technology is difficult to the fine adjustment realizing current potential height, let alone uses this potentiometer to carry out the detection of various parameter; Second is linearly not easily regulate, and variable inductance formula transducer adopts solid core usually, to iron core processing uniformity, coil winding uniformity requirement very high.
Summary of the invention
The object of the invention is to propose wider, the maneuverable electronic potentiometer of a kind of adjustable range, adopt the variable inductance transducer that this potentiometer is assembled, the Processing Algorithm of subsequent conditioning circuit can be simplified, make transducer install, debug convenient.
For achieving the above object, scheme of the present invention is as follows:
A kind of electronic potentiometer, comprise coil and magnetic conduction sheet, its main points are: in the inner chamber of described coil, be equipped with bracing frame, and described magnetic conduction sheet fixed by this bracing frame, and support frame as described above can drive described magnetic conduction sheet to move in the inner chamber of described coil.
The present invention carries out Creative Design according to many deficiencies of existing potentiometer, by magnetic conduction sheet is being fixed on bracing frame, especially for the magnetic conduction sheet that material is softer, the reliable fixing of magnetic conduction sheet can be realized, avoiding magnetic conduction sheet and coil etc. that touching occurs causes certainty of measurement difference etc. not live, fix described magnetic conduction sheet due to bracing frame and can move back and forth with in this magnetic conduction sheet in coil chamber, make magnetic conduction sheet at different insertion depths, there is different magnetic conduction abilities, thus the output valve of adjustment variable inductance, reach required output linearity.
Support frame as described above is in " C " character form structure, and have the magnetic conduction sheet mounting groove of " C " font in support frame as described above upper surface, described magnetic conduction sheet embeds and is fixed in this magnetic conduction sheet mounting groove, and this magnetic conduction sheet is the strip of the descending rule change of a width.
Support frame as described above is in " C " character form structure, and have the magnetic conduction sheet mounting bar groove of " C " font in support frame as described above upper surface, described magnetic conduction sheet embeds and is fixed in this magnetic conduction sheet mounting bar groove, and this magnetic conduction sheet is the strip of the descending change of a width.
Adopt above structure, bracing frame in " C " character form structure, when rotating under the drive of bracing frame at other parts, the range ability of magnetic conduction sheet in coil in chamber can be made longer, namely rotational angle is larger, and the built-in length of magnetic conduction sheet is longer, finally realizes adjustable range of the present invention larger; In above structure, magnetic conduction sheet embeds in magnetic conduction sheet mounting bar groove and can be good at the reliable installation realizing magnetic conduction sheet, simultaneously, do not need to shape to magnetic conduction sheet, directly the magnetic conduction sheet processed is carried out changing, so saved the processing cost of magnetic conduction sheet, be also convenient to the replacing of magnetic conduction sheet; The magnetic conduction sheet of above structure can judge different magnetic conduction abilities according to the shape of magnetic conduction sheet, obtains difference and the parameter of rule.
Be fixed with push rod in support frame as described above one end, and this push rod is positioned at below support frame as described above.Adopt above structure, push rod can be fixed with other parts, thus can be good at effect bracing frame being played to support, so push rod can drive bracing frame to rotate reliably.
Described push rod upper end and support frame as described above are fixed, and this push rod lower end is fixed with rotating shaft fixed block, and this rotating shaft fixed block has rotating shaft installing hole.Adopt above structure, can be good at by rotating shaft installing hole the connection realizing push rod and bracing frame and power part, thus realize its rotation.
Described rotating shaft installing hole is circular configuration, and the center line of this rotating shaft installing hole and bracing frame overlaps.
Described rotating shaft fixed block is circular configuration, and the diameter of this rotating shaft fixed block is less than the diameter of support frame as described above.
Adopt above structure, when rotating shaft fixed block drives push rod and bracing frame rotates, because the center line of described rotating shaft installing hole and bracing frame overlaps, thus bracing frame can not be waved, so can not interfere with the inner chamber of coil, make the precision of measurement more accurate.
Support frame as described above evenly has the notch communicated with described magnetic conduction sheet mounting groove.Adopt above structure, can be good at through notch the installation situation problem checking magnetic conduction sheet, also facilitate the dismounting of magnetic conduction sheet simultaneously.
Described coil is provided with the first coil and the second coil, described first coil and the second coil are wound on the drum stand of band cavity respectively, wherein the two ends of the first coil lead to the first coil connecting line and the first coil return line respectively, and the two ends of the second coil lead to the second coil connecting line and the second wire loop line respectively.Inductance coil forms mutual inductor by the first coil and the second coil, and testing circuit can determine the inductance parameters of variable inductance by the voltage transitions coefficient between measurement first coil and the second coil, thus determines location parameter, and testing circuit is easy to realize.
For the ease of observing various states when the present invention uses, be fixed with rotation axis at described rotating shaft installing hole, described rotation axis, bracing frame, push rod and rotating shaft fixed block are installed in shell, and this shell is made up of transparent material.
Electronic potentiometer and calibration steps thereof, is characterized in that comprising the steps:
1) measure: the described magnetic conduction sheet of strip strip structure is linearly progressively sent in linear coil, records the electrical quantity that described magnetic conduction sheet is arranged in the described each position of linear coil inner chamber;
2) regulate: by step 1) detect after magnetic conduction sheet take out, prune, regulate the magnetic conduction cross-sectional sizes of this magnetic conduction sheet (2);
3) calibrate: repeatedly carry out step 1) and step 2), until the electrical quantity compound of each position sets requirement when magnetic conduction sheet stretches into described linear coil;
4) assemble: by step 3) magnetic conduction sheet calibrate is fixed into " C " shape structure, and in magnetic conduction sheet mounting bar groove feeding " C " shape coil of the magnetic conduction sheet of " C " shape structure embedding support frame as described above, thus finished product will be assembled.
Above method is adopted to calibrate potentiometer, can prune magnetic conduction sheet accurately, regulate the size in the magnetic conduction cross section of magnetic conduction sheet accurately simultaneously, again the magnetic conduction sheet adjusted bent to " C " character form structure and be arranged on bracing frame, avoid directly magnetic conduction sheet to be arranged on bracing frame and adjust again, need repeatedly to take off the trouble that magnetic conduction sheet carries out regulating, so make this kind of method convenient, potentiometer can be made to obtain higher, school precision accurately when measuring simultaneously.
Remarkable result of the present invention is: by increasing bracing frame, increase the adjustable range of potentiometer comparatively, the physical structure simultaneously changing magnetic conduction sheet realizes the adjustment of variable inductance parameter, simplifies the Processing Algorithm in subsequent conditioning circuit, testing circuit is easy to realize, and transducer is installed, it is more convenient to debug; The calibration steps of potentiometer provided by the invention is simply novel, has convenient and swift, precision high.
Accompanying drawing explanation
Fig. 1 is cross section structure schematic diagram of the present invention;
Fig. 2 is the mounting structure schematic diagram of bracing frame 3 in Fig. 1, push rod 4, rotating shaft fixed block 5 and magnetic conduction sheet 2;
Fig. 3 is the structural representation of Fig. 1 coil 1;
Fig. 4 is three kinds of state diagrams when combining of bracing frame 3 and coil 1;
Fig. 5 is mounting structure exploded perspective view of the present invention;
Fig. 6 is the calibration steps flow chart of non-contact point potentiometer of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1 and Figure 4, a kind of electronic potentiometer, comprises coil 1, magnetic conduction sheet 2, bracing frame 3 etc., is equipped with bracing frame 3 in the inner chamber of described coil 1, described magnetic conduction sheet 2 fixed by this bracing frame 3, and support frame as described above 3 can drive described magnetic conduction sheet 2 to move in the inner chamber of described coil 1.
As shown in Figure 2 and Figure 4: support frame as described above 3 is in " C " character form structure, and have the magnetic conduction sheet mounting bar groove 3a of " C " font in support frame as described above 3 upper surface, described magnetic conduction sheet 2 embeds and is fixed in this magnetic conduction sheet mounting bar groove 3a; Certain above-mentioned bracing frame 3 is also not necessarily in " C " character form structure, and support frame as described above 3 can be straight, as long as this bracing frame can be fixed magnetic conduction sheet 2 and can move in coil 1; Described magnetic conduction sheet 2 is the flake of the descending change of a width, described magnetic conduction sheet 2 can select be soft with hard two kinds, just select to adopt during soft material bracing frame fixed effect can be more obvious, but not as restriction.
Refer to Fig. 2 and Fig. 4: be fixed with push rod 4 in support frame as described above 3 one end, and this push rod 4 is positioned at below support frame as described above 3, namely described push rod 4 upper end and support frame as described above 3 are fixed, this push rod 4 lower end is fixed with rotating shaft fixed block 5, this rotating shaft fixed block 5 has rotating shaft installing hole 5a, described rotating shaft installing hole 5a is circular configuration, and the center line of this rotating shaft installing hole 5a and bracing frame 3 overlaps; Described rotating shaft fixed block 5 is circular configuration, and the diameter of this rotating shaft fixed block 5 is less than the diameter of support frame as described above 3; Support frame as described above 3 evenly has the notch 3b communicated with described magnetic conduction sheet mounting groove 3a.
Refer to Fig. 3 and Fig. 5: described coil 1 is provided with the first coil 1a and the second coil 1b, described first coil 1a and the second coil 1b is wound on the drum stand 1c of band cavity respectively, wherein the two ends of the first coil 1a lead to the first coil connecting line V1 and the first coil return line G1 respectively, the two ends of the second coil 1b lead to the second coil connecting line V2 and the second wire loop line G2 respectively, inductance coil forms mutual inductor by the first coil 1a and the second coil 1b, testing circuit can determine the inductance parameters of variable inductance by the voltage transitions coefficient between measurement first coil 1a and the second coil 1b, thus determine liquid level, testing circuit is easy to realize.
It can also be seen that in Figure 5: be fixed with rotation axis 6 at described rotating shaft installing hole 5a, described rotation axis 6, bracing frame 3, push rod 4 and rotating shaft fixed block 5 are installed in shell 7, and this shell 7 is made up of transparent material.
Refer to Fig. 6: electronic potentiometer and calibration steps thereof, it is characterized in that comprising the steps:
1) measure: the described magnetic conduction sheet 2 of strip strip structure is linearly progressively sent in linear coil, records the electrical quantity that described magnetic conduction sheet 2 is arranged in the described each position of linear coil inner chamber; Namely be that the magnetic conduction sheet 2 of strip is progressively stretched in coil 2, measure electrical parameter values when magnetic conduction sheet 2 often enters certain depth, line item of going forward side by side;
2) regulate: by step 1) detect after magnetic conduction sheet 2 take out, prune, regulate the magnetic conduction cross-sectional sizes of this magnetic conduction sheet 2;
The regulative mode of magnetic conduction cross-sectional sizes is a lot, can be magnetic conduction sheet 2 is holed, also can be magnetic conduction sheet 2 is slotted, sawtooth, can also be that magnetic conduction sheet 2 is repaired, regulate the schemes such as magnetic conduction sheet 2 thickness.
3) calibrate: repeatedly carry out step 1) and step 2), until the electrical quantity compound setting requirement of each position when magnetic conduction sheet 2 stretches into described linear coil, the rule presenting linear structure change or other settings changes, and namely calibrates complete;
4) assemble: by step 3) magnetic conduction sheet 2 calibrate is fixed into " C " shape structure, and embedded by the magnetic conduction sheet 2 of " C " shape structure in magnetic conduction sheet mounting bar groove 3a feeding " C " shape coil of support frame as described above 3, thus assemble finished product.
Typical apply of the present invention is as liquid level sensor, rotation axis 6 one end is connected on lever and float, the other end is connected on rotating shaft fixed block 5, bracing frame 3 is supported on described rotating shaft fixed block 5 by push rod 4, magnetic conduction sheet 2 is fixed in the upper end of bracing frame 3, and bracing frame 3 and magnetic conduction sheet 2 fixed thereon are located in coil 1, and coil 1 is electrically connected with circuit board 8 by connecting line, this liquid level sensor is also provided with a transparent shell 7, rotation axis 6, coil 1, magnetic conduction sheet 2, bracing frame 3, rotating shaft fixed block 5 and push rod 4 are arranged in second chamber 7a of shell 7, the circuit board 8 being provided with seal box is positioned at first chamber 7b of shell 7, outside shell 7, be also provided with bonnet 9 seal, the external circuit of circuit board 8 is only had to connect pin V, S, G stretches out outside encapsulation box.
Float just can drive rotation axis 6 to rotate by lever, by regulating rotary moving axis 6, drives magnetic conduction sheet 2 to rotate, be deep into coil 1 inner, along with the anglec of rotation of magnetic conduction sheet 2 is different, different induced signals can be obtained, thus export different electric potential signals, change inductance signal, measure level value, because bracing frame 3 is in " C " character form structure, the advantage of this structure is the tolerance of environment strong, stability is high, and the adjustable range of output signal is wide, is easy to batch production.
Operation principle of the present invention is: by arranging bracing frame and changing the shape of magnetic conduction sheet, make magnetic conduction sheet at different insertion depths, there is different magnetic conduction abilities, thus the output valve of adjustment variable inductance, reach required output linearity, simplify subsequent algorithm, make transducer install, debug convenient.
Claims (2)
1. an electronic potentiometer, comprise coil (1) and magnetic conduction sheet (2), it is characterized in that: in the inner chamber of described coil (1), be equipped with bracing frame (3), at the upper fixing described magnetic conduction sheet (2) of this bracing frame (3), support frame as described above (3) can drive described magnetic conduction sheet (2) to move in the inner chamber of described coil (1); Support frame as described above (3) is soft material; Support frame as described above (3) is in " C " character form structure, the magnetic conduction sheet mounting bar groove (3a) of " C " font is had in support frame as described above (3) upper surface, described magnetic conduction sheet (2) embeds and is fixed in this magnetic conduction sheet mounting bar groove (3a), and this magnetic conduction sheet (2) is the strip of the descending change of a width; Be fixed with push rod (4) in support frame as described above (3) one end, and this push rod (4) is positioned at support frame as described above (3) below; Described push rod (4) upper end and support frame as described above (3) are fixed, this push rod (4) lower end is fixed with rotating shaft fixed block (5), and this rotating shaft fixed block (5) has rotating shaft installing hole (5a); Described rotating shaft installing hole (5a) is circular configuration, and the center line of this rotating shaft installing hole (5a) and bracing frame (3) overlaps; Described rotating shaft fixed block (5) is circular configuration, and the diameter of this rotating shaft fixed block (5) is less than the diameter of support frame as described above (3); Support frame as described above (3) evenly has the notch (3b) communicated with described magnetic conduction sheet mounting bar groove (3a); Described coil (1) is provided with the first coil (1a) and the second coil (1b), described first coil (1a) and the second coil (1b) are wound on the drum stand (1c) of band cavity respectively, wherein the two ends of the first coil (1a) lead to the first coil connecting line (V1) and the first coil return line (G1) respectively, and the two ends of the second coil (1b) lead to the second coil connecting line (V2) and the second wire loop line (G2) respectively; Rotation axis (6) is fixed with described rotating shaft installing hole (5a), described rotation axis (6), bracing frame (3), push rod (4) and rotating shaft fixed block (5) are installed in shell (7), and this shell (7) is made up of transparent material.
2. a calibration steps for electronic potentiometer according to claim 1, is characterized in that comprising the steps:
1) measure: the described magnetic conduction sheet (2) of strip strip structure is linearly progressively sent in linear coil, records the electrical quantity that described magnetic conduction sheet (2) is arranged in the described each position of linear coil inner chamber;
2) regulate: by step 1) detect after magnetic conduction sheet (2) take out, prune, regulate the magnetic conduction cross-sectional sizes of this magnetic conduction sheet (2);
3) calibrate: repeatedly carry out step 1) and step 2), until the electrical quantity compound of each position sets requirement when magnetic conduction sheet (2) stretches into described linear coil;
4) assemble: by step 3) magnetic conduction sheet (2) calibrated is fixed into " C " shape structure, and the magnetic conduction sheet mounting bar groove (3a) magnetic conduction sheet (2) of " C " shape structure being embedded support frame as described above (3) is sent in " C " shape coil, thus assembling finished product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110376846.1A CN102496433B (en) | 2011-11-23 | 2011-11-23 | Electronic potentiometer and calibration method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110376846.1A CN102496433B (en) | 2011-11-23 | 2011-11-23 | Electronic potentiometer and calibration method thereof |
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| CN102496433A CN102496433A (en) | 2012-06-13 |
| CN102496433B true CN102496433B (en) | 2015-01-28 |
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| CN110568049B (en) * | 2019-09-12 | 2021-04-02 | 中国原子能科学研究院 | Calibration method of oxygen analyzer |
| CN113421730B (en) * | 2021-06-18 | 2023-03-31 | 深圳市谷粒科技有限公司 | Self-adaptive full stroke detection electromagnetic induction type potentiometer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200948575Y (en) * | 2006-09-18 | 2007-09-19 | 李中好 | Electromagnetic power actuated setting device |
| CN201780941U (en) * | 2010-07-28 | 2011-03-30 | 宁波奇乐电器科技有限公司 | Transmission mechanism of tripping device |
| CN102231940A (en) * | 2011-06-01 | 2011-11-02 | 蒋勤舟 | Packaging method of circuit board and liquid level sensor device using same |
| CN202502851U (en) * | 2011-11-23 | 2012-10-24 | 蒋勤舟 | Electronic potentiometer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2554781Y (en) * | 2002-05-08 | 2003-06-04 | 张嘉元 | Non-contact potentiometer |
| CN101436463A (en) * | 2007-06-18 | 2009-05-20 | 王鹏 | Detachable high precision feeble current sensor |
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2011
- 2011-11-23 CN CN201110376846.1A patent/CN102496433B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200948575Y (en) * | 2006-09-18 | 2007-09-19 | 李中好 | Electromagnetic power actuated setting device |
| CN201780941U (en) * | 2010-07-28 | 2011-03-30 | 宁波奇乐电器科技有限公司 | Transmission mechanism of tripping device |
| CN102231940A (en) * | 2011-06-01 | 2011-11-02 | 蒋勤舟 | Packaging method of circuit board and liquid level sensor device using same |
| CN202502851U (en) * | 2011-11-23 | 2012-10-24 | 蒋勤舟 | Electronic potentiometer |
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