CN102901487B - Reluctance type inclination angle sensor - Google Patents
Reluctance type inclination angle sensor Download PDFInfo
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- CN102901487B CN102901487B CN201210428308.7A CN201210428308A CN102901487B CN 102901487 B CN102901487 B CN 102901487B CN 201210428308 A CN201210428308 A CN 201210428308A CN 102901487 B CN102901487 B CN 102901487B
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Abstract
The invention provides a reluctance type inclination angle sensor. The reluctance type inclination angle sensor comprises a cylindrical body, an end cover, a connecting piece and a mandrel, a fixed plate, an annular soft magnet, E-type soft magnet coils and a detection circuit, wherein a through groove is formed in the center of the mandrel; the fixed plate is connected with the mandrel through the through groove; the fixed plate and the mandrel penetrate through and are arranged in the annular soft magnet; two side edges of the fixed plate are fixedly connected with the inner side surface of the annular soft magnet; the connecting piece is positioned on the cylindrical body and/or the end cover and is matched with and connected with two ends of the mandrel; the E-type soft magnet coils are arranged on the outer side surface of the cylindrical body; the cylindrical body is in sealed connection with the end cover to form a closed cavity; the annular soft magnet and the cylindrical body are eccentrically fixed through the fixed plate; and the detection circuit is connected with the E-type soft magnet coils and is used for detecting an oscillation frequency value, wherein an inclination angle is obtained by mapping the oscillation frequency value.
Description
Technical field
The present invention relates to data message detection field, particularly a kind of reluctance type inclination angle sensor.
Background technology
Sensor is a kind of pick-up unit, measured information can be experienced, and can the information experienced be detected, the information being for conversion into electric signal or other desired forms according to certain rules exports, to meet the requirements such as the transmission of information, process, storage, display, record and control.It is the primary link realizing automatically detecting and automatically controlling.
Obliquity sensor as the one of sensor, its be according to Newton second law be theoretical foundation make, for measuring the instrument of object angle with respect to the horizontal plane.That is, obliquity sensor can be used for the change of pitch angle amount measured with respect to the horizontal plane.
Obliquity sensor is widely used in the various application taken measurement of an angle.Such as, the pitch angle measurement of high-precision laser instrument level, engineering mechanical device leveling, remote distance mearuring equipment, High Altitude Platform safeguard protection, directed satellite communication antenna, ship's navigation attitude measurement, the application of shield structure push pipe, dam detect, the monitoring of geology device inclined, penetrate measurement of angle, radar vehicle detection of platform, satellite communication car attitude detection etc. at the beginning of system for artillery.
In the feedback control system of above-mentioned various instrument and device, obliquity sensor is self-evident as its importance of main devices of feedback element, it outputs signal the important evidence that control system often makes a policy, and the distortion of feedback signal may the consequence of bringing on a disaster property.Such as: obliquity sensor fluid,matching level sensor is used for landslide or snowslide monitoring, and it transfers data to central control system by wireless sensing system, and Real-Time Monitoring massif state, can effectively reduce the loss that landslide is brought.Again such as: obliquity sensor is applied to railroad rail, particularly, obliquity sensor is applied to the monitoring of electric power line steel tower angle of inclination, can Real-Time Monitoring power transmission line angle of inclination, once because the disasteies such as strong wind cause angle of inclination excessive, send early warning signal in real time, keeped in repair by staff, and then reduce the loss, etc.In existing obliquity sensor, a class designs based on capacitance principle.The typical products of such sensor is AccuStar obliquity sensor produced in USA.Its design mainly holds a slice conventional capacitive sheet between two halves sensor enclosing cover.This capacitance sheet, through etching, constitutes two variable condenser.Sensor module, be i.e. filled with dielectric medium solution and inert gas between two electrodes of electric capacity.When sensor has rotary motion, the liquid level of electrolyte between the capacitance electrode of sensor also will change position owing to will keep level thereupon, thus make capacitor produce linear change, finally make sensor export corresponding dip angle signal.
A class obliquity sensor is also had to design based on acceleration transducer.Ultimate principle based on the obliquity sensor of acceleration transducer is: acceleration sensor outputs signals is after analog to digital conversion, after transferring to microprocessor to carry out the process such as filtering, level and smooth, variance evaluation, obtain accurate instantaneous acceleration, the most accurately instantaneous acceleration is resolved as obliquity information.
Another kind of obliquity sensor designs based on magnetoresistive transducer principle.The representative of such sensor is the TCM series electronic compass of Precision Navigation company of the U.S..Such sensor is based on magnetic strength (MI) technology, and namely changes of magnetic field causes the change of sensing unit inductance value, converts the analog voltage that sensor exports to digital signal through A/D circuit.The data provided due to this sensor are calculating in the Fundamentals of Measurement of terrestrial magnetic field.
A class obliquity sensor is also had to be the obliquity sensor designed based on MEMS angular rate gyroscope.Wherein the sensor of an output angle speed reaches with Beijing StarNet space the angular rate gyroscope that the XWG80 type low-power consumption micro-mechanical gyroscope of company designs and CRS03 type gyroscope produced in USA are representative.The angular rate gyroscope of these two models is all based on MEMS angular rate gyroscope chip design peripheral circuit, enables sensor export the analog voltage be directly proportional to turning rate.
Above-mentioned obliquity sensor principle is different, differs from one another, but has again the limitation that cannot overcome simultaneously.
Wherein, the measuring principle of capacitance principle sensor and acceierometer sensor is all prototype with gravity pendulum, capacitance principle sensor and acceierometer sensor are for eliminating by the impact of translatory acceleration during kinetic measurement, and also from another side illustration, these sensors are used for kinetic measurement is infeasible for this.
The measurement of reluctance principle sensor, be subject to the influence of magnetic field of surrounding environment (as high-lager building, iron ore mine, generating plant, high-tension transformation equipment etc. on the one hand, even near the iron and steel article of sensor), on the other hand, although existing reluctance principle sensor has static magnetic field calibration function, but it does not have the calibration function for dynamic magnetic field, so be not suitable for the measurement of dip angle in dynamic system.
High-grade gyroscope can three rotational angles, angular velocity and angular acceleration of output region Eulerian angle, and the translational velocity in three directions, translatory acceleration, although high-grade gyrostatic sensor can be applied to the measurement of dip angle in dynamic system, but the type sensor price costly, greatly can improve the cost of feedback system, be unfavorable for widespread use.
Therefore, how to provide a kind of obliquity sensor, above-mentioned shortcoming can be overcome, become technical matters urgently to be resolved hurrily.
Summary of the invention
The technical problem to be solved in the present invention how to provide a kind of reluctance type inclination angle sensor, utilizes eccentric center principle, can measure the problem in tilt angles and direction in a dynamic system.
For solving the problems of the technologies described above, the invention provides a kind of reluctance type inclination angle sensor, comprising: cylindrical shell, end cap, web member, mandrel, fixed head, annular soft magnetic bodies, E type soft magnetic bodies coil, testing circuit;
Wherein, in the middle of described mandrel, there is groove; Described fixed head is connected with described mandrel by described groove; Described fixed head and described mandrel are arranged in described annular soft magnetic bodies, and described fixed head dual-side is fixedly connected with described annular soft magnetic bodies medial surface; Described web member, is positioned on described cylindrical shell and/or end cap, and in mating connection with described mandrel two ends; Described E type soft magnetic bodies coil is installed on described cylindrical shell lateral surface; Described cylindrical shell and described end cap is airtight is connected to form closed cavity; Described annular soft magnetic bodies is fixed by described fixed head and described cylindrical shell bias; Described testing circuit, is connected with described E type soft magnetic bodies coil, for detecting oscillation frequency value, being mapped obtain tilt angles by oscillation frequency value.
Preferably, the eccentric distance of described annular soft magnetic bodies and described cylindrical shell, is adjusted by the position of described fixed head at described mandrel.
Preferably, described web member is bearing; Described annular soft magnetic bodies is circular ferrite or nickel oxysome or zinc oxysome; Described E type soft magnetic bodies coil is E type ferrite coil or E type nickel oxysome coil or E type zinc oxysome coil.
Preferably, described fixed head is damping sheet.
Preferably, reluctance type inclination angle sensor provided by the invention comprises further: damping fluid, and described damping fluid pours in described closed cavity.
Preferably, reluctance type inclination angle sensor provided by the invention comprises further: multiple blister, is mounted opposite in both sides, described damping sheet upper edge, and away from described annular soft magnetic bodies eccentric direction.
Preferably, O-ring seal is provided with between described cylindrical shell and described end cap.
Preferably, described E type soft magnetic bodies coil is multiple.
Preferably, the two ends, outside of described cylindrical shell and/or end cap are provided with projecting shaft, be used for fixing and support obliquity sensor when detecting.
Compared with prior art, feature of the present invention is, the present invention utilizes eccentric center principle, is changed the magnetic resistance change rate caused, and then obtain corresponding angle by measurement by air gap distance.Therefore, structure of the present invention is simple, and cost is lower, and measurement range is large, and reaction velocity, dynamic accuracy are high.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention and technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment and description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the entirety composition structural representation of a kind of obliquity sensor provided by the invention;
Fig. 2 is the principle of work schematic diagram of a kind of obliquity sensor provided by the invention;
Fig. 3 is many groups E type soft magnetic bodies coil working principle schematic of a kind of obliquity sensor provided by the invention;
Fig. 4 A and Fig. 4 B is front view and the axonometric drawing of the fixed head of a kind of obliquity sensor provided by the invention respectively;
Fig. 5 A and Fig. 5 B is front view and the axonometric drawing of the inner barrel of a kind of obliquity sensor provided by the invention respectively;
Fig. 6 A and Fig. 6 B is front view and the axonometric drawing of the mandrel of a kind of obliquity sensor provided by the invention respectively;
Fig. 7 A and Fig. 7 B is front view and the axonometric drawing of the cylindrical shell of a kind of obliquity sensor provided by the invention respectively;
Fig. 8 A and Fig. 8 B is front view and the axonometric drawing of the end cap of a kind of obliquity sensor provided by the invention respectively;
Fig. 9 A and Fig. 9 B is front view and the axonometric drawing of the annular soft magnetic bodies of a kind of obliquity sensor provided by the invention respectively.
Embodiment
Below by engaging the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to shown in Fig. 1, Fig. 1 is the entirety composition structural representation of a kind of obliquity sensor provided by the invention.
A kind of obliquity sensor provided by the invention, comprising: cylindrical shell 1, end cap 2, web member 4, mandrel 5, fixed head 6, annular soft magnetic bodies 7, E type soft magnetic bodies coil 8, testing circuit;
Wherein, in the middle of described mandrel 5, there is groove 51; Described fixed head 6 is connected with described mandrel 5 by described groove 51; Described fixed head 6 and described mandrel 5 are arranged in described annular soft magnetic bodies 7, and described fixed head 6 dual-side is fixedly connected with described annular soft magnetic bodies 7 medial surface; Described web member 4, is positioned on described cylindrical shell 1 and/or end cap 2, and in mating connection with described mandrel 5 two ends; Described E type soft magnetic bodies coil 8 is installed on described cylindrical shell 1 lateral surface; Described cylindrical shell 1 is connected to form closed cavity with described end cap 2 is airtight; Described annular soft magnetic bodies 7 is fixing with described cylindrical shell 1 bias by described fixed head 6; Described testing circuit, is connected with described E type soft magnetic bodies coil, for detecting oscillation frequency value, being mapped obtain tilt angles by oscillation frequency value.
Described web member is bearing, is positioned at described cylindrical shell and/or end cap medial center.
Please refer to shown in Fig. 2, Fig. 2 is the principle of work schematic diagram of a kind of obliquity sensor provided by the invention.
Described E type soft magnetic bodies coil 8 of the present invention is installed on outside cylindrical shell 1, and along with object under test rotates together with cylindrical shell 1, its angle departing from vertical direction is defined as φ, according to triangle geometric relationship, can draw following equation:
wherein, d is air gap distance, the distance namely between E type soft magnetic bodies coil 8 and annular soft magnetic bodies 7; R is the internal diameter of cylindrical shell 1; R is the external diameter of annular soft magnetic bodies 7; Unit m; Δ is the eccentric spacing of annular soft magnetic bodies 7 relative to cylindrical shell 1.From above formula, air gap distance becomes corresponding relation with angle, and when angle changes, air gap distance changes thereupon, and then causes the change of magnetic resistance, by the measurement of peripheral testing circuit for magnetic resistance, can obtain corresponding angular metric.The present invention is by utilizing eccentric center principle, is changed the magnetic resistance change rate caused, and then obtain corresponding angle by measurement by air gap distance.Therefore, structure of the present invention is simple, and cost is lower, and measurement range is large, and reaction velocity, dynamic accuracy are high.
It should be noted that, the gap existed between annular soft magnet and E type soft magnet, is referred to as air gap.Coil produces magnetic field, and magnetic field is propagated by E type coil, and magnetic field is equivalent to electric current for magnetic resistance and corresponds to resistance, represents the conducting effect in magnetic field.Much smaller than in soft magnet of magnetic permeability in air, therefore the change of air gap on the impact of overall magnetic resistance clearly, and the present invention utilizes the magnetic resistance changing air-gap separation and then change magnetic circuit, then detects the angle turned over.
The course of work of the present invention and its testing circuit is as follows: after system electrification, oscillatory circuit starting of oscillation, the sinusoidal waveform that output amplitude is less.Sinusoidal waveform adjusts by finishing circuit, and output duty cycle is the square wave of 50%.Square-wave signal access check-out console, by the check-out console side of measurement wave frequency.When sensor run-off the straight, housing into rotation followed by telefault i.e. E type soft magnetic bodies coil, and annular soft magnetic bodies is under the effect of fixed head, and the position keeping original changes hardly.Because the bias of annular soft magnetic bodies is installed, make the spacing of telefault and annular soft magnetic bodies become large by minimum value gradually with certain geometric relationship, cause inductance value to diminish, thus square wave frequency value becomes large.Cylindrical shell rotates a circle, and angle changes 360 °, and corresponding square wave frequency value, also completes the output of one-period.Thus complete the measurement to angle by frequency measurement.
In a kind of obliquity sensor provided by the invention, described annular soft magnetic bodies 7 and the eccentric distance of described cylindrical shell 1, can be adjusted by the position of described fixed head 6 at described mandrel 5 according to demand.
Again with reference to shown in figure 1, in a kind of obliquity sensor provided by the invention, described web member 4 is bearing; Described annular soft magnetic bodies 7 is circular ferrite or nickel oxysome or zinc oxysome; Described E type soft magnetic bodies coil 8 is E type ferrite coil or E type nickel oxysome coil or E type zinc oxysome coil.
Shown in figure 3, Fig. 3 is in a kind of obliquity sensor of the present invention, adopts many group E type soft magnetic bodies coil 8 principle of work schematic diagram.
Due to the symmetry of system architecture, one group of E type soft magnetic bodies coil 8 can measure angle, but cannot obtain the direction of angle.In order to obtain the direction taken measurement of an angle, need to increase by one group or several groups of E type soft magnetic bodies coils 8 according to same principle on cylindrical shell 1, as shown in Figure 3.Now, wherein one group of circle of serving as theme, as 8-1, its main measurement of angle effect, another group is for ancillary coil is as 8-2, and Main Function is the direction of calibration measurements angle.Ancillary coil 8-2 can arrange arbitrarily, but can not be arranged in 180 ° of directions of main coil.
Described E type soft magnetic bodies coil is arranged in the outside of cylindrical shell, corresponding with annular soft magnetic bodies, and forms closed magnetic circuit.
Please refer to shown in Fig. 4 A, Fig. 4 B, Fig. 5 A, Fig. 5 B, described Fig. 4 A and Fig. 4 B is front view and the axonometric drawing of the fixed head of a kind of obliquity sensor provided by the invention respectively; Fig. 5 A and Fig. 5 B is front view and the axonometric drawing of the inner barrel of a kind of obliquity sensor provided by the invention respectively.
Described cylindrical shell 1 comprises mandrel 5, damping sheet 6, annular soft magnetic bodies 7, blister 9, and be consolidated composition, and is articulated with the inside of cylindrical shell 1 and end cap 2 sensor outer housing by bearing 4.
Described fixed head 6 in the present invention is damping sheet.Can also comprise in described cylindrical shell 1: damping fluid 10, described damping fluid 10 pours in described closed cavity; Described blister can be multiple, is mounted opposite in both sides, described damping sheet upper edge, and away from described annular soft magnetic bodies eccentric direction.Wherein, damping sheet is plate part, in damping fluid 10, provide damping force, thus plays the effect suppressing translation noise.
Described annular soft magnetic bodies bias be fixed in mandrel, be connected by damping sheet (fixed head) between them, the plane at damping sheet place is through the center of mandrel and annular soft magnetic bodies, and damping sheet is symmetrical about mandrel, damping fin can be symmetrical be arranged as many groups, the center of each damping fin overlaps with mandrel.
Please refer to shown in Fig. 6 A and Fig. 6 B, Fig. 6 A and Fig. 6 B is front view and the axonometric drawing of the mandrel of a kind of obliquity sensor provided by the invention respectively.
Described mandrel 5 is axial workpieces, and centre has groove, for installing fixing damping sheet 6, and adjusts the eccentric spacing of annular soft magnetic bodies 7 relative to cylindrical shell 1 by the installation site adjusting damping sheet 6.
Please refer to Fig. 7 A and Fig. 7 B and Fig. 8 A and Fig. 8 B, described Fig. 7 A and Fig. 7 B is front view and the axonometric drawing of the cylindrical shell of a kind of obliquity sensor provided by the invention respectively; Described Fig. 8 A and Fig. 8 B is front view and the axonometric drawing of the end cap of a kind of obliquity sensor provided by the invention respectively.
Wherein, O-ring seal is provided with between described cylindrical shell 1 and described end cap.The two ends, outside of described cylindrical shell and/or end cap are provided with projecting shaft, be used for fixing and support obliquity sensor when detecting.Described cylindrical shell is thin-walled cup-shaped member, and one end is closed, and the output shaft that stretches out, to fixedly mount.Openend radial equipartition six through holes, by screw and end cap fastening, be also furnished with O-ring seal between the two, formed airtight cavity, described O-ring seal can be O RunddichtringO.
Please refer to Fig. 9 A and Fig. 9 B, described Fig. 9 A and Fig. 9 B is front view and the axonometric drawing of the annular soft magnetic bodies of a kind of obliquity sensor provided by the invention respectively.
Wherein, annular soft magnetic bodies 7 is ferromagnetism material parts of annular, forms with E type soft magnetic bodies coil 8 magnetic circuit closed.Described annular soft magnetic bodies is circular ferrite or nickel oxysome or zinc oxysome; Described E type soft magnetic bodies coil is E type ferrite coil or E type nickel oxysome coil or E type zinc oxysome coil.
The present invention succeeds in developing experimental prototype, and has carried out implementing test.The parameter of this model machine and performance: measurement range :-180---+180 °, measuring accuracy: ± 0.05 °, kinetic measurement progress: ± 0.1 °.
As can be seen here, the invention provides a kind of obliquity sensor, utilize eccentric center principle, changed the magnetic resistance change rate caused by distance, and then obtain corresponding angle.
In addition, due to the entirety of annular soft magnetic bodies, damping sheet and mandrel, under the acting in conjunction of the eccentric gravity of annular soft magnetic bodies and blister buoyancy, damping sheet is made to remain vertical direction; And because liquid only transmits the characteristic of shear wave, and under the effect of damping fluid damping, the translation impact in rotation process can be restrained effectively.
Compared with traditional obliquity sensor, have the following advantages: structure is simple, and cost is lower, measurement range is large, and be swift in response, dynamic accuracy is high, has good inhibition to translation.The single axle rotation be applicable under compound movement condition is measured.
The foregoing is only the preferred implementation of a kind of reluctance type inclination angle sensor provided by the invention, do not form limiting the scope of the present invention.Number of components in this embodiment is not limited to the mode adopted in embodiment, and any any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (9)
1. a reluctance type inclination angle sensor, is characterized in that, comprising: cylindrical shell, end cap, web member, mandrel, fixed head, annular soft magnetic bodies, E type soft magnetic bodies coil, testing circuit;
Wherein, in the middle of described mandrel, there is groove; Described fixed head is connected with described mandrel by described groove; Described fixed head and described mandrel are arranged in described annular soft magnetic bodies, and described fixed head dual-side is fixedly connected with described annular soft magnetic bodies medial surface; Described web member, is positioned on described cylindrical shell and/or end cap, and in mating connection with described mandrel two ends; Described E type soft magnetic bodies coil is installed on described cylindrical shell lateral surface; Described cylindrical shell and described end cap is airtight is connected to form closed cavity; Described annular soft magnetic bodies is fixed by described fixed head and described cylindrical shell bias; Described testing circuit, is connected with described E type soft magnetic bodies coil, for detecting oscillation frequency value, being mapped obtain tilt angles by oscillation frequency value.
2. the reluctance type inclination angle sensor according to claims 1, is characterized in that, the eccentric distance of described annular soft magnetic bodies and described cylindrical shell, is adjusted by the position of described fixed head at described mandrel.
3. the reluctance type inclination angle sensor according to claims 1, is characterized in that, described web member is bearing; Described annular soft magnetic bodies is circular ferrite or nickel oxysome or zinc oxysome; Described E type soft magnetic bodies coil is E type ferrite coil or E type nickel oxysome coil or E type zinc oxysome coil.
4. the reluctance type inclination angle sensor according to claims 1, is characterized in that, described fixed head is damping sheet.
5. the reluctance type inclination angle sensor according to claims 4, is characterized in that, comprises further: damping fluid, and described damping fluid pours in described closed cavity.
6. the reluctance type inclination angle sensor according to claims 5, is characterized in that, comprises further: multiple blister, is mounted opposite in both sides, described damping sheet upper edge, and away from described annular soft magnetic bodies eccentric direction.
7. the reluctance type inclination angle sensor according to claims 1, is characterized in that, is provided with O-ring seal between described cylindrical shell and described end cap.
8. reluctance type inclination angle sensor according to claim 1, is characterized in that, described E type soft magnetic bodies coil is multiple.
9. the reluctance type inclination angle sensor according to patent requirements 1, is characterized in that being, the two ends, outside of described cylindrical shell and/or end cap are provided with projecting shaft, is used for fixing and supports obliquity sensor when detecting.
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| CN201210428308.7A CN102901487B (en) | 2012-10-31 | 2012-10-31 | Reluctance type inclination angle sensor |
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| CN201210428308.7A CN102901487B (en) | 2012-10-31 | 2012-10-31 | Reluctance type inclination angle sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107370757B (en) * | 2017-08-28 | 2020-09-11 | 苏州乐菲昂科技有限公司 | Internet of things system based on ANT protocol, angle measuring method and device |
| CN109470210B (en) * | 2018-12-29 | 2023-10-27 | 桂林市利通电子科技有限责任公司 | Toppling sensor |
| CN113790707B (en) * | 2021-09-13 | 2022-08-23 | 吉林大学 | Thermal convection type electrochemical tilt angle sensor |
| CN114812617B (en) * | 2022-07-01 | 2022-10-04 | 深圳市沃感科技有限公司 | Intelligent inclination angle calibration device and calibration method thereof |
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