CN204988166U - Position detection device - Google Patents
Position detection device Download PDFInfo
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- CN204988166U CN204988166U CN201290001320.3U CN201290001320U CN204988166U CN 204988166 U CN204988166 U CN 204988166U CN 201290001320 U CN201290001320 U CN 201290001320U CN 204988166 U CN204988166 U CN 204988166U
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
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- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Position detection device possesses: have polarity face and the S utmost point of the N utmost point the polarity face, install in reciprocating motion's drive shaft, and produce the body along the shifting magnetic field that the direction with the direction of the magnetic poles quadrature removed, have produce the party of the body with the shifting magnetic field polarity in the face of putting the first fixed magnetic substance of the curve portion of configuration, dispose in the polarity that produces the another party of the body with the shifting magnetic field in the face of the position of putting, have the curve portion opposition that is separating the shifting magnetic field and producing the body and first fixed magnetic substance, and fix the magnetic substance with the second that the shifting magnetic field produced the parallel straight line of the moving direction of the body, and set up between the fixed magnetic substance of first fixed magnetic substance and second, detect the magnetic sensor that the shifting magnetic field produced the position of the body, the shifting magnetic field produce the body have at least set up in the one side with first fixed magnetic substance opposition and with the nonmagnetic distance piece of one side of the fixed magnetic substance opposition of second, the shifting magnetic field produces the body, and to separate the distance piece attached in the sharp portion of the fixed magnetic substance of second with the help of magnetic force.
Description
Technical field
The utility model relates to position detecting device, and this position detecting device detects the shift position of carrying out the object of rectilinear motion.
Background technology
Existing position detecting device described in patent documentation 1 is formed as following structure: arranged in facing mode with the second component being fixed with flux detection element by the first component being fixed with magnet device, the relative displacement between two parts is detected with magnetic means, wherein, the magnetic flux that produces from magnet device of flux detection element testing.
In addition, existing position detecting device described in patent documentation 2 is formed as following structure: possess magnet and be fixed with the flux channeled parts of magnetoelastic transducer key element, the displacement of the magnet of mutual relative motion relative to flux channeled parts is detected with magnetic means, wherein, magnetoelastic transducer key element detects the magnetic flux produced from magnet.
Patent documentation 1: Japanese Unexamined Patent Publication 2007-121256 publication
Patent documentation 2: Japanese Unexamined Patent Application Publication 2005-515459 publication
The structure that existing position detecting device is formed as making to have gap between magnet and flux channeled parts and makes above-mentioned two part displacements in a non-contact manner, but can because two parts are by magnetic force tractive or be applied with the external factors such as vibration and produce and rock.Rock if produced, then by the flux change of magnetoelastic transducer key element, therefore, with output valve change therewith.As a result, even if the relative position relationship of two parts, also can become and represent that position there occurs the output valve of change, therefore, the problem that location accuracy of detection reduces.
In addition, in the past, as rocking countermeasure, such as by magnet configuration in from the position of flux channeled component deflection or utilize the magnet of spring to insert-molding to pressurize this magnet is pressed on flux channeled parts, but correspondingly need space and parts, can cause complicated because of the maximization of device and the increase of component parts number, large on the impact of reliability, size, cost.
Utility model content
The utility model completes to solve above-mentioned problem, its object is to provide a kind of and prevents rocking of magnet and improve the position detecting device of precision.
Position detecting device in the technical solution of the utility model 1 possesses: shifting magnetic field produces body, this shifting magnetic field produces body to be had the polar surface of N pole and is positioned at the polar surface of S pole of rear side of polar surface of N pole, be installed on reciprocating driving shaft, and move along the direction orthogonal with the pole orientation that this NS pole arranges, first fixed magnetic body, the curve part that the polar surface that this first fixed magnetic body has the side producing body with shifting magnetic field is arranged opposite, second fixed magnetic body, this the second fixed magnetic body is configured at the opposed position of the polar surface that produces the opposing party of body with shifting magnetic field, has that to produce body across shifting magnetic field opposed with the curve part of the first fixed magnetic body and produce the parallel line part of the moving direction of body with shifting magnetic field, and Magnetic Sensor, this Magnetic Sensor is arranged between the first fixed magnetic body and the second fixed magnetic body, corresponding with the to-and-fro movement of driving shaft, the distance that shifting magnetic field produces between body and the curve part of the first fixed magnetic body changes, flux change passed through thus, Magnetic Sensor detects the position that shifting magnetic field produces body accordingly, shifting magnetic field produces body and has the nonmagnetic distance piece being at least arranged at the side opposed with the first fixed magnetic body and the side opposed with the second fixed magnetic body, shifting magnetic field produces body and invests the line part of the second fixed magnetic body across this distance piece by magnetic sticker.
The feature of the position detecting device involved by technical scheme 2 is, in the position detecting device involved by technical scheme 1, the thickness of the side opposed with above-mentioned first fixed magnetic body of above-mentioned distance piece is greater than the thickness of the side opposed with above-mentioned second fixed magnetic body.
The feature of the position detecting device involved by technical scheme 3 is, in the position detecting device involved by technical scheme 2, the thickness of the side opposed with above-mentioned second fixed magnetic body of above-mentioned distance piece is formed as the thickness that ensure that the thickness suitable with following wear extent, and above-mentioned wear extent is wear extent when sliding stipulated number on the line part of above-mentioned second fixed magnetic body.
The feature of the position detecting device involved by technical scheme 4 is, in the position detecting device involved by technical scheme 1, the volume that the above-mentioned shifting magnetic field generation bodily form becomes above-mentioned second fixed magnetic side is greater than the shape of the volume on above-mentioned first fixed magnetic side.
The feature of the position detecting device involved by technical scheme 5 is, in the position detecting device involved by technical scheme 4, the cross section from above-mentioned first fixed magnetic body towards the direction of above-mentioned second fixed magnetic body that above-mentioned shifting magnetic field produces body is triangle, convex form or concave shape.
The position detecting device of technical solutions of the utility model 6 possesses: mobile magnetic, and this moves magnetic and is installed on reciprocating driving shaft and moves, first fixed magnetic body, this first fixed magnetic body has curve part, second fixed magnetic body, this second fixed magnetic body has across the mobile magnetic line part opposed and parallel with the moving direction of mobile magnetic with the curve part of the first fixed magnetic body, fixed magnetic field produces body, and this fixed magnetic field produces body and is arranged between the first fixed magnetic body and the second fixed magnetic body, produces the magnetic field by the curve part of the first fixed magnetic body and the line part of the second fixed magnetic body, and Magnetic Sensor, this magnetic sensor configuration produces on the magnetic field of body at fixed magnetic field, corresponding with the to-and-fro movement of driving shaft, distance between the curve part of mobile magnetic and the first fixed magnetic body changes, flux change passed through thus, Magnetic Sensor detects the position of mobile magnetic accordingly, mobile magnetic has the nonmagnetic distance piece being at least arranged at the side opposed with the first fixed magnetic body and the side opposed with the second fixed magnetic body, mobile magnetic produces by fixed magnetic field the line part that the magnetic sticker of body invests the second fixed magnetic body across this distance piece.
According to the utility model, the shifting magnetic field being installed on driving shaft produces body and invests the line part of the second fixed magnetic body across nonmagnetic distance piece by magnetic sticker and slide, and can prevent from thus rocking, can improve position detection accuracy.
According to the utility model, the magnetic sticker that the mobile magnetic being installed on driving shaft produces body across nonmagnetic distance piece by fixed magnetic field invests the line part of the second fixed magnetic body and slides, and can prevent from thus rocking, can improve position detection accuracy.
Accompanying drawing explanation
Fig. 1 is the front view of the basic structure of the position detecting device illustrated involved by embodiment 1 of the present utility model.
Fig. 2 is the front view after being amplified by the distance piece of the position detecting device involved by embodiment 1.
Fig. 3 A, Fig. 3 B, Fig. 3 C are the cut-open views after the shifting magnetic field of the position detecting device involved by embodiment 1 generation body and distance piece being amplified.
Fig. 4 A, Fig. 4 B illustrate the variation of the distance piece of the position detecting device involved by embodiment 1, and Fig. 4 A is stereographic map, and Fig. 4 B is the cut-open view after cutting off along AA line.
Fig. 5 is the front view of the basic structure of the position detecting device illustrated involved by embodiment 2 of the present utility model.
Fig. 6 is the front view of the variation of the position detecting device illustrated involved by embodiment 2.
Embodiment
Below, in order to be described in detail the utility model, be described for implementing mode of the present utility model with reference to accompanying drawing.
Embodiment 1.
Fig. 1 illustrates the basic block diagram of the position detecting device in embodiment 1 of the present utility model, possesses: as the first fixed magnetic body 10 and the second fixed magnetic body 20 of fixture; The shifting magnetic field of magnet produces body 30; The Magnetic Sensor 40 of Hall element; And nonmagnetic distance piece 50.
Shifting magnetic field produces the face that body 30 possesses the polarity of the both sides with N pole and S pole, and it is mobile along the direction (hereinafter referred to as moving direction X) orthogonal with the direction (hereinafter referred to as pole orientation Y) that N pole and S pole arrange that this shifting magnetic field produces body 30.First fixed magnetic body 10 is to configure with the mode that shifting magnetic field produces the polar surface of a side of body 30 opposed, and the second fixed magnetic body 20 produces the polar surface configuration of the opposing party of body 30 relative to shifting magnetic field.
In addition, utilize nonmagnetic resin component to produce body 30 to this shifting magnetic field and carry out insert-molding, form distance piece 50 and driving shaft 51.Although the diagram of omission, driving shaft 51 is installed on the axle etc. of actuator, and axle is along moving direction X to-and-fro movement (rectilinear motion), and thus, the driving shaft 51 formed as one with this axle and shifting magnetic field produce body 30 and also move along moving direction X.
Curve part 11 is formed with the face that shifting magnetic field produces the opposed side of body 30 at the first fixed magnetic body 10.Even if it is harmless that this curve part 11 is not level and smooth curve shape yet, can be comprise many straight lines polygon-shaped.
On the other hand, produce the face (opposed faces of the first above-mentioned fixed magnetic body 10) of the opposed side of body 30 at the second fixed magnetic body 20 with shifting magnetic field, be formed with the line part 21 that the moving direction X that produces body 30 with shifting magnetic field is parallel.Thus, shifting magnetic field produces body 30 in the gap be made up of the opposed faces of the first fixed magnetic body 10 and the second fixed magnetic body 20, slides along moving direction X with the state investing the line part 21 of the second fixed magnetic body 20 across distance piece 50 by magnetic sticker.
In addition, between the first fixed magnetic body 10 and the second fixed magnetic body 20, be configured with Magnetic Sensor 40, and lead to wire (electrode terminal) 41 towards the outside.In the example in fig 1, one end of the moving direction X of the second fixed magnetic body 20 is formed as the L shape vertically bent, and the teat 22 making this vertically bend is opposed with the end face of the first fixed magnetic body 10.Further, Magnetic Sensor 40 is configured between this teat 22 and opposed faces of the first fixed magnetic body 10.
The magnetic flux that the polar surface of side, N pole producing body 30 from shifting magnetic field sends to be formed from the teat 22 of the curve part 11 of the first fixed magnetic body 10, Magnetic Sensor 40, second fixed magnetic body 20 by line part 21 towards the flux loop that the polar surface of side, S pole flows.And, produce body 30 by shifting magnetic field to move along moving direction X, the magnetic flux density that the curve part 11 of the first fixed magnetic body 10 and the shifting magnetic field distance produced between body 30 are left and formed loop reduces, or curve part 11 and shifting magnetic field produce distance between body 30 close to and the magnetic flux density that forms loop increases.
The curve part 11 of the first fixed magnetic body 10 be formed as displacement that shifting magnetic field produces the moving direction X of body 30 with by the proportional shape of the magnetic flux density (flux loop) of Magnetic Sensor 40.Magnetic Sensor 40 pairs of magnetic fluxs carry out ratio conversion and convert voltage to and export, and export and shifting magnetic field produces voltage corresponding to the displacement of body 30.Thus, can detect according to the output voltage of Magnetic Sensor 40 position that shifting magnetic field produces body 30, and then detect the position of axle etc. of actuator.
In the position detecting device of present embodiment 1, the distance piece 50 that Nei Bao shifting magnetic field produces body 30 slides along moving direction X under the state of line part 21 investing the second fixed magnetic body 20 by magnetic sticker, therefore, even if be applied with the external factors such as vibration, shifting magnetic field produces body 30 and also can not rock.Therefore, the output voltage of Magnetic Sensor 40 can not change, and accuracy of detection improves.
In addition, coated by utilizing distance piece 50 to carry out, can prevent shifting magnetic field produce body 30 breakage when disperse.
In addition, shifting magnetic field produce the N pole of body 30 and S pole towards also can be contrary.In addition, as long as the position arranging Magnetic Sensor 40 is on the magnetic field of magnetic field generating body 30, illustrated example is not limited to.
Herein, the preferred structure example for making shifting magnetic field generation body 30 be attached at the second fixed magnetic body 20 by magnetic force is described.
Fig. 2 is the front view after being amplified by distance piece 50.As shown in Figure 2, when Nei Bao shifting magnetic field is produced body 30 distance piece 50, the thickness of the side of the line part 21 that is attached at the second fixed magnetic body 20 is set to A, when the thickness of the side opposed with the curve part 11 of the first fixed magnetic body 10 is set to B, in the mode becoming the size relationship of A < B, body 30 is produced to shifting magnetic field and carry out insert-molding.Thus, keep shifting magnetic field to produce body 30 in the mode producing distance till body 30 to the second fixed magnetic body 20 from shifting magnetic field shorter than the distance produced from shifting magnetic field till body 30 to the first fixed magnetic body 10, act on the shifting magnetic field magnetic force produced between body 30 and the second fixed magnetic body 20 and be greater than and act on shifting magnetic field and produce magnetic force between body 30 and the first fixed magnetic body 10.Therefore, shifting magnetic field produces body 30 and is easily attached at the second fixed magnetic body 20.
In addition, in the case of figure 2, only adjust thickness A, the B of distance piece 50, therefore, it is possible to easily manufacture, the effect that productivity improves and cost reduces can be obtained.
Like this, in the position detecting device involved by present embodiment 1, distance piece 50 invests the line part 21 of the second fixed magnetic body 20 by magnetic sticker and slides, therefore, by long-time use, the face skimming wear of the second fixed magnetic body 20 side (thickness A side) of distance piece 50.If wear and tear completely in the second fixed magnetic body 20 side of distance piece 50, then there is shifting magnetic field and produce the possibility that body 30 rocks when sliding or directly contact with the second fixed magnetic body 20, therefore, the thickness A being desirably in distance piece 50 guarantees the thickness of wear extent.
For the thickness of wear extent, can carry out wear test, the measurement result of the wear extent of the distance piece 50 when sliding based on the number of times specified with the slip number of times etc. suitable with the life-span of position detecting device determines.
In addition, even if when guaranteeing the thickness of wear extent, also size is set in the mode that thickness B is thicker than the thickness A of the thickness comprising this wear extent.
As the preferred structure example for making shifting magnetic field generation body 30 be attached at the second fixed magnetic body 20 by magnetic force, except as shown in Figure 2 the thickness A of distance piece 50, the size relationship of B being studied, such as, also can the shape that shifting magnetic field produces body 30 be studied.
Shown in Fig. 3 A, Fig. 3 B, Fig. 3 C, shifting magnetic field is produced body 30 to cut off along the direction from the first fixed magnetic body 10 to the second fixed magnetic body 20 with distance piece 50 and the cut-open view that obtains.As shown in Figure 3A, shifting magnetic field produces the section constitution of body 30 is triangle.In addition, such as, as shown in Figure 3 B, shifting magnetic field produces the section constitution of body 30 is convex form.In addition, such as, as shown in Figure 3 C, the central portion making shifting magnetic field produce the polar surface opposed with the curve part 11 of the first fixed magnetic body 10 of body 30 caves in, thus section constitution is concave shape.
When arbitrary shape of Fig. 3 A ~ Fig. 3 C, shifting magnetic field produce body 30 the volume being attached at the side of the line part 21 of the second fixed magnetic body 20, be greater than the volume of the side opposed with the curve part 11 of the first fixed magnetic body 10, act on the shifting magnetic field magnetic force produced between body 30 and the second fixed magnetic body 20 and be greater than and act on shifting magnetic field and produce magnetic force between body 30 and the first fixed magnetic body 10.Therefore, shifting magnetic field produces body 30 and is easily attached at the second fixed magnetic body 20.
Preferably be configured to: the volume that shifting magnetic field produces body 30 accounts for over half in the second fixed magnetic body 20 side.
In addition, exemplified with section triangle, convex form and concave shape in Fig. 3 A, Fig. 3 B, Fig. 3 C, but the variation that shifting magnetic field produces body 30 is not limited thereto.
In addition, only can implement the thickness A of distance piece 50 shown in Fig. 2, the research of the size relationship of B and Fig. 3 A, Fig. 3 B, the shifting magnetic field shown in Fig. 3 C and produce any one party in the research of the shape of body 30, also both sides can be combined enforcement.
And then in Fig. 1 ~ Fig. 3 A, Fig. 3 B, Fig. 3 C, distance piece 50 is formed as the structure that coated shifting magnetic field produces body 30 entirety, but also can be formed as the structure of a coated part.Herein, the variation of distance piece 50 shown in Fig. 4 A, Fig. 4 B.As shown in the stereoscopic figure of Fig. 4 A, when forming distance piece 50 and driving shaft 51 when utilizing nonmagnetic resin component to carry out insert-molding to shifting magnetic field generation body 30, distance piece 50 is formed as framework, as shown in the cut-open view of Fig. 4 B, peristome 50a ~ 50d is set.In the case of such a construction, the distance piece 50 surrounding the frame shaped of shifting magnetic field generation body 30 invests the line part 21 of the second fixed magnetic body 20 by magnetic sticker and slides.
In addition, in the above description, utilize nonmagnetic resin component to form distance piece 50, but be not limited thereto, as long as nonmagnetic parts.
Above, according to embodiment 1, position detecting device possesses: shifting magnetic field produces body 30, this shifting magnetic field produces body 30 to be had the polar surface of N pole and is positioned at the polar surface of S pole of rear side of polar surface of N pole, be installed on reciprocating driving shaft 51, and move along the moving direction X orthogonal with the pole orientation Y that this NS pole arranges, first fixed magnetic body 10, the curve part 11 that the polar surface that this first fixed magnetic body 10 has the side producing body 30 with shifting magnetic field is arranged opposite, second fixed magnetic body 20, this the second fixed magnetic body 20 is configured at the opposed position of the polar surface that produces the opposing party of body 30 with shifting magnetic field, has that to produce body 30 across shifting magnetic field opposed with the curve part 11 of the first fixed magnetic body 10 and produce the parallel line part 21 of the moving direction X of body 30 with shifting magnetic field, and Magnetic Sensor 40, this Magnetic Sensor 40 is arranged between the first fixed magnetic body 10 and the second fixed magnetic body 20, corresponding with the to-and-fro movement of driving shaft 51, the distance that shifting magnetic field produces between body 30 and the curve part 11 of the first fixed magnetic body 10 changes, flux change passed through thus, Magnetic Sensor 40 detects the position that shifting magnetic field produces body 30 accordingly, shifting magnetic field produces body 30 and is configured to: this shifting magnetic field produces body 30 and has the nonmagnetic distance piece 50 being at least arranged at the side opposed with the first fixed magnetic body 10 and the side opposed with the second fixed magnetic body 20, invest the line part 21 of the second fixed magnetic body 20 by magnetic sticker across this distance piece 50.Therefore, Nei Bao shifting magnetic field produce body 30 distance piece 50 invest by magnetic sticker the second fixed magnetic body 20 line part 21 slide in state dynamic, even if be applied with the external factors such as vibration, shifting magnetic field produce body 30 also can not rock.Thus, the output of Magnetic Sensor 40 can not change, and position detection accuracy improves.
In addition, according to embodiment 1, distance piece 50 is configured to: the thickness B of the side opposed with the first fixed magnetic body 10 is greater than the thickness A of the side opposed with the second fixed magnetic body 20.Therefore, it is possible to make the distance piece 50 of Nei Bao shifting magnetic field generation body 30 be attached at the second fixed magnetic body 20 with the structure easily manufactured, productivity can be improved and reduce costs.
In addition, according to embodiment 1, be configured to the thickness being formed as the thickness A of the side opposed with the second fixed magnetic body 20 of distance piece 50 to ensure that the thickness suitable with following wear extent, this wear extent is wear extent when sliding stipulated number on the line part 21 of the second fixed magnetic body 20.Therefore, in use, even if the second fixed magnetic body 20 Slideslip wearing and tearing of distance piece 50, shifting magnetic field also can be made to produce body 30 can not directly be contacted with the second fixed magnetic body 20, can guarantee stable sliding.
In addition, according to embodiment 1, shifting magnetic field produces the shape that volume that body 30 is configured to the second fixed magnetic body 20 side is greater than the volume of the first fixed magnetic body 10 side.Therefore, not by means of only the thickness A, the B that adjust distance piece 50 as described above, and produced the volume of body 30 by adjustment shifting magnetic field, the distance piece 50 that Nei Bao shifting magnetic field also can be made to produce body 30 is attached at the second fixed magnetic body 20.
Embodiment 2.
Fig. 5 is the front view of the basic structure of the position detecting device illustrated involved by present embodiment 2, and the part identical or suitable with Fig. 1 ~ Fig. 4 A, Fig. 4 B is marked to identical label and omit the description.In above-mentioned embodiment 1, using the shifting magnetic field of magnet produce body 30 as position detected object, but in present embodiment 2 using mobile magnetic 70 as position detected object.
In the structure shown here, between the teat 22 fixed magnetic field of magnet generation body 60 being arranged on the second fixed magnetic body 20 and Magnetic Sensor 40.In addition, utilize nonmagnetic resin component to carry out insert-molding to mobile magnetic 70, form distance piece 50 and driving shaft 51.
The magnetic flux that the polar surface of side, N pole producing body 60 from fixed magnetic field sends is formed from the teat 22 of the second fixed magnetic body 20 by the curve part 11 of line part 21, mobile magnetic 70, first fixed magnetic body 10, Magnetic Sensor 40 and the flux loop that flows towards the polar surface of side, S pole.And, distance piece 50 in the mobile magnetic 70 of the bag magnetic sticker that on one side produces body 60 by fixed magnetic field invest the line part 21 of the second fixed magnetic body 20 while movement, thus, the magnetic flux density that distance between the curve part 11 of the first fixed magnetic body 10 and mobile magnetic 70 is left and formed loop reduces, or distance between curve part 11 and mobile magnetic 70 close to and the magnetic flux density that forms loop increases.Magnetic Sensor 40 pairs of magnetic fluxs carry out ratio conversion and convert voltage to and export, and export the voltage corresponding with the displacement of mobile magnetic 70.
In addition, fixed magnetic field produce the N pole of body 60 and S pole towards also can be contrary.In addition, in Figure 5, fixed magnetic field is produced body 60 and be arranged between Magnetic Sensor 40 and the second fixed magnetic body 20, but also can be arranged on as shown in Figure 6 between Magnetic Sensor 40 and the first fixed magnetic body 10.
And then, can as described in Fig. 2 of above-mentioned embodiment 1, the thickness that the Thickness Ratio of that be formed as the distance piece 50 of the mobile magnetic of interior bag 70, opposed with the curve part 11 of the first fixed magnetic body 10 side is attached at the side of the line part 21 of the second fixed magnetic body 20 is thick, to make easily to be attached at the second fixed magnetic body 20.In addition, also can as described in Fig. 3 A, Fig. 3 B of above-mentioned embodiment 1, Fig. 3 C, the volume being configured to the second fixed magnetic body 20 side of mobile magnetic 70 is greater than the volume of the first fixed magnetic body 10 side, to make easily to be attached at the second fixed magnetic body 20.
Above, according to embodiment 2, position detecting device possesses: mobile magnetic 70, and this moves magnetic 70 and is installed on reciprocating driving shaft 51 and moves, first fixed magnetic body 10, this first fixed magnetic body 10 has curve part 11, second fixed magnetic body 20, this second fixed magnetic body 20 has the line part 21 opposed with the curve part 11 of the first fixed magnetic body 10 and parallel with the moving direction of mobile magnetic 70 across mobile magnetic 70, fixed magnetic field produces body 60, and this fixed magnetic field produces body 60 and is arranged between the first fixed magnetic body 10 and the second fixed magnetic body 20, produces the magnetic field by the curve part 11 of the first fixed magnetic body 10 and the line part 21 of the second fixed magnetic body 20, and Magnetic Sensor 40, this Magnetic Sensor 40 is configured in fixed magnetic field and produces on the magnetic field of body 60, corresponding with the to-and-fro movement of driving shaft 51, distance between mobile magnetic 70 and the curve part 11 of the first fixed magnetic body 10 changes, flux change passed through thus, Magnetic Sensor 40 detects the position of mobile magnetic 70 accordingly, mobile magnetic 70 is configured to: this moves magnetic 70 and has the nonmagnetic distance piece 50 being at least arranged at the side opposed with the first fixed magnetic body 10 and the side opposed with the second fixed magnetic body 20, invest the line part 21 of the second fixed magnetic body 20 by the magnetic sticker of fixed magnetic field generation body 60 across this distance piece 50.Therefore, the distance piece 50 of the mobile magnetic of interior bag 70 invest by magnetic sticker the second fixed magnetic body 20 line part 21 slide in state dynamic, even if be applied with the external factors such as vibration, mobile magnetic 70 also can not rock.Thus, the output of Magnetic Sensor 40 can not change, and position detection accuracy improves.
In addition, the application's utility model can carry out the omission of any inscape in the distortion of the independent assortment of each embodiment or any inscape of each embodiment or each embodiment in the scope of this utility model.
Industry utilizes possibility
As mentioned above, position detecting device involved by the utility model makes shifting magnetic field produce body or mobile magnetic is attached at fixed magnetic body across distance piece and slides thus make it have resistance to vibration, therefore, the position detecting device etc. of shaft position of actuator of moving vane etc. detecting and drive and be equipped on the throttling valve of vehicle, EGR (ExhaustGasRecirculation) valve, WG (WasteGate) valve, VG (VariabeGeometric) turbine system is suitable as.
Label declaration
10: the first fixed magnetic bodies; 11: curve part; 20: the second fixed magnetic bodies; 21: line part; 22: teat; 30: shifting magnetic field produces body; 40: Magnetic Sensor; 41: wire; 50: distance piece; 50a ~ 50d: peristome; 51: driving shaft; 60: fixed magnetic field produces body; 70: mobile magnetic.
Claims (6)
1. a position detecting device, is characterized in that,
Described position detecting device possesses:
Shifting magnetic field produces body, and this shifting magnetic field produces body to be had the polar surface of N pole and is positioned at the polar surface of S pole of rear side of polar surface of N pole, is installed on reciprocating driving shaft, and moves along the direction orthogonal with the pole orientation that this NS pole arranges;
First fixed magnetic body, the curve part that the polar surface that this first fixed magnetic body has the side producing body with described shifting magnetic field is arranged opposite;
Second fixed magnetic body, this the second fixed magnetic body is configured at the opposed position of the polar surface that produces the opposing party of body with described shifting magnetic field, has that to produce body across described shifting magnetic field opposed with the curve part of described first fixed magnetic body and produce the parallel line part of the moving direction of body with described shifting magnetic field; And
Magnetic Sensor, this Magnetic Sensor is arranged between described first fixed magnetic body and described second fixed magnetic body, corresponding with the to-and-fro movement of described driving shaft, the distance that described shifting magnetic field produces between body and the curve part of described first fixed magnetic body changes, flux change passed through thus, described Magnetic Sensor detects the position that described shifting magnetic field produces body accordingly
Described shifting magnetic field produces body and has the nonmagnetic distance piece being at least arranged at the side opposed with described first fixed magnetic body and the side opposed with described second fixed magnetic body, and described shifting magnetic field produces body and invests the line part of described second fixed magnetic body across described distance piece by magnetic sticker.
2. position detecting device according to claim 1, is characterized in that,
The thickness of the side opposed with described first fixed magnetic body of described distance piece is greater than the thickness of the side opposed with described second fixed magnetic body.
3. position detecting device according to claim 2, is characterized in that,
The thickness of the side opposed with described second fixed magnetic body of described distance piece is formed as the thickness that ensure that the thickness suitable with following wear extent, and described wear extent is wear extent when sliding stipulated number on the line part of described second fixed magnetic body.
4. position detecting device according to claim 1, is characterized in that,
The volume that the described shifting magnetic field generation bodily form becomes described second fixed magnetic side is greater than the shape of the volume on described first fixed magnetic side.
5. position detecting device according to claim 4, is characterized in that,
The cross section from described first fixed magnetic body towards the direction of described second fixed magnetic body that described shifting magnetic field produces body is triangle, convex form or concave shape.
6. a position detecting device, is characterized in that,
Described position detecting device possesses:
Mobile magnetic, this moves magnetic and is installed on reciprocating driving shaft and moves;
First fixed magnetic body, this first fixed magnetic body has curve part;
Second fixed magnetic body, this second fixed magnetic body has across the described mobile magnetic line part opposed and parallel with the moving direction of described mobile magnetic with the curve part of described first fixed magnetic body;
Fixed magnetic field produces body, and this fixed magnetic field produces body and is arranged between described first fixed magnetic body and described second fixed magnetic body, produces the magnetic field by the curve part of described first fixed magnetic body and the line part of described second fixed magnetic body; And
Magnetic Sensor, this magnetic sensor configuration produces on the magnetic field of body at described fixed magnetic field, corresponding with the to-and-fro movement of described driving shaft, distance between the curve part of described mobile magnetic and described first fixed magnetic body changes, flux change passed through thus, described Magnetic Sensor detects the position of described mobile magnetic accordingly
Described mobile magnetic has the nonmagnetic distance piece being at least arranged at the side opposed with described first fixed magnetic body and the side opposed with described second fixed magnetic body, and described mobile magnetic invests the line part of described second fixed magnetic body across this distance piece by the magnetic sticker that described fixed magnetic field produces body.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/078861 WO2014073055A1 (en) | 2012-11-07 | 2012-11-07 | Position detection device |
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| Publication Number | Publication Date |
|---|---|
| CN204988166U true CN204988166U (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201290001320.3U Expired - Lifetime CN204988166U (en) | 2012-11-07 | 2012-11-07 | Position detection device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5675009B2 (en) |
| CN (1) | CN204988166U (en) |
| WO (1) | WO2014073055A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441064A (en) * | 2016-11-02 | 2017-02-22 | 广东百合医疗科技股份有限公司 | Method for measuring displacement through magnetic gap and equipment thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3056622B2 (en) * | 1993-11-25 | 2000-06-26 | 富士通株式会社 | Position detection device |
| JP2003065705A (en) * | 2001-08-27 | 2003-03-05 | Nippon Soken Inc | Displacement sensor |
| DE10202309A1 (en) * | 2002-01-23 | 2003-07-31 | Bosch Gmbh Robert | Displacement sensor with magnetoelectric transducer element |
| WO2003062741A2 (en) * | 2002-01-23 | 2003-07-31 | Robert Bosch Gmbh | Path sensor with an magnetoelectric transformer element |
| JP2006073711A (en) * | 2004-09-01 | 2006-03-16 | Daido Steel Co Ltd | Non-contact variable resistor |
| CN101331385B (en) * | 2005-12-16 | 2011-11-30 | 旭化成电子材料元件株式会社 | Position detector |
| JP4606485B2 (en) * | 2008-09-02 | 2011-01-05 | アルプス電気株式会社 | Movement detection device using magnets |
-
2012
- 2012-11-07 CN CN201290001320.3U patent/CN204988166U/en not_active Expired - Lifetime
- 2012-11-07 JP JP2014545488A patent/JP5675009B2/en not_active Expired - Fee Related
- 2012-11-07 WO PCT/JP2012/078861 patent/WO2014073055A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441064A (en) * | 2016-11-02 | 2017-02-22 | 广东百合医疗科技股份有限公司 | Method for measuring displacement through magnetic gap and equipment thereof |
| CN106441064B (en) * | 2016-11-02 | 2020-01-31 | 广东百合医疗科技股份有限公司 | method and equipment for measuring displacement by magnetic seam |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5675009B2 (en) | 2015-02-25 |
| JPWO2014073055A1 (en) | 2016-09-08 |
| WO2014073055A1 (en) | 2014-05-15 |
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