CN103547929B - Speed detection device of eddy current meter - Google Patents
Speed detection device of eddy current meter Download PDFInfo
- Publication number
- CN103547929B CN103547929B CN201280024591.5A CN201280024591A CN103547929B CN 103547929 B CN103547929 B CN 103547929B CN 201280024591 A CN201280024591 A CN 201280024591A CN 103547929 B CN103547929 B CN 103547929B
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- China
- Prior art keywords
- mentioned
- screw
- rotor
- eddy current
- installation site
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/07—Indicating devices, e.g. for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/07—Indicating devices, e.g. for remote indication
- G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
- G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
- G01P1/11—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by the detection of the position of the indicator needle
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/49—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents
- G01P3/495—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents where the indicating means responds to forces produced by the eddy currents and the generating magnetic field
Abstract
Provided is a speed detection device of an eddy current meter, the speed detection device capable of reducing the cost by reduction in the number of components and maintaining stable detection accuracy. In an eddy current meter (C) provided with a magnet rotor (2) which rotates with a main shaft (1), a rotor (3) which rotates with the rotation of the magnet rotor (2), a pointer shaft (5) which is affixed to the rotor (3) and to which a pointer (4) is attached, and a frame body (6) which secures the main shaft (1) and in which the magnet rotor (2) and the rotor (3) are disposed, a speed detection device is provided with a magnetic detection element (7) provided near the magnet rotor (2), a circuit board (8) on which the magnetic detection element (7) is disposed, and a holder (9) which holds the circuit board (8) in the frame body (6), a pair of arm pieces (9b, 9c); is provided in the holder (9), the respective arm pieces (9b, 9c) are affixed to the frame body (6) via first and second screws (10a, 10b), and the magnetic detection element (7) is located on a line (L) connecting a mounting position (X) by the first screw (10a) and a mounting position (Y) by the second screw (10b).
Description
Technical field
The present invention relates to a kind of Eddy Current Type surveying instrument with speed detector.
Background technology
For the speed detector in existing Eddy Current Type surveying instrument, by turning axle, magnet, needle pivot, in the Eddy Current Type surveying instrument that hairspring and tablet are formed, there is the magnetoelectric conversion element in the magnetic circuit being arranged on above-mentioned magnet, wherein, above-mentioned turning axle transmits the rotation of the wheel of vehicle, the wheel of this vehicle is rotatably pivotally mounted on the framework of Eddy Current Type surveying instrument, above-mentioned magnet is arranged at the upper end of this turning axle, above-mentioned needle pivot is arranged at said frame, angle transfer is carried out pro rata with the rotational speed of above-mentioned turning axle, above-mentioned hairspring controls the rotation of this needle pivot, above-mentioned tablet is arranged at the bottom of this needle pivot, to have the mode in a little space to arrange (such as with above-mentioned magnet, see patent documentation 1).
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 63-88752 publication
Summary of the invention
The problem that invention will solve
In the past, the fixture construction of above-mentioned magnetoelectric conversion element in said frame is following structure: by installing plate screw-driving in said frame, and by the casing screw-driving that is made up of insulating material on this installing plate, the circuit board use screw-driving of above-mentioned magnetoelectric conversion element will be installed on this casing.Because number of components is more and complicated, therefore there is the high problem of cost.In addition, because number of components is many, according to this installation accuracy, there is deviation the position that can produce above-mentioned magnetoelectric conversion element, is difficult to maintain the problem of stable accuracy of detection.
So the present invention makes to solve the problem.Its object is to provide a kind of can by reducing the speed detector in the Eddy Current Type surveying instrument of number of components and reduced cost and the stable accuracy of detection of maintenance.
For solving the technical scheme of problem
For the speed detector in Eddy Current Type surveying instrument of the present invention, this Eddy Current Type surveying instrument has: the Magnmet rotor rotated together with main shaft; The rotor rotated with the rotation of Magnmet rotor; Be fixed on rotor and the needle pivot of pointer is housed; Fixed main shaft is also provided with the framework of Magnmet rotor and rotor, and the speed detector in this Eddy Current Type surveying instrument has: be arranged at the magnetic detecting element near above-mentioned Magnmet rotor; Be provided with the circuit substrate of above-mentioned magnetic detecting element; Foregoing circuit substrate is held in the maintaining part of above-mentioned framework, a pair wrist sheet is provided with in above-mentioned maintaining part, described each wrist sheet is fixed on above-mentioned framework by the 1st screw, the 2nd screw, and above-mentioned magnetic detecting element is positioned on the connecting line of the installation site of above-mentioned 1st screw and the installation site of above-mentioned 2nd screw.
In addition, for the speed detector in Eddy Current Type surveying instrument of the present invention, the installation site of above-mentioned 1st screw is different at the axial height of the rotation of above-mentioned Magnmet rotor from the installation site of above-mentioned 2nd screw.
In addition, for the speed detector in Eddy Current Type surveying instrument of the present invention, the installation site of above-mentioned 1st screw is different relative to the position of the vertical direction of the turning axle of above-mentioned Magnmet rotor from the installation site of above-mentioned 2nd screw.
The effect of invention
The present invention can provide a kind of can by reducing the speed detector in the Eddy Current Type surveying instrument of number of components and reduced cost and the stable accuracy of detection of maintenance.
Accompanying drawing explanation
The outboard profile of the speed detector in the Eddy Current Type surveying instrument of Fig. 1 involved by the 1st example of the present invention;
The front view (FV) of the key position of the speed detector in the Eddy Current Type surveying instrument of Fig. 2 involved by above-mentioned example;
Fig. 3 is the sectional view of the A-A line along Fig. 2;
Fig. 4 is the sectional view of the B-B line along Fig. 2;
Fig. 5 is the stereographic map of maintaining part.
Embodiment
With reference to the accompanying drawings, the 1st example of the speed detector W in Eddy Current Type surveying instrument C involved in the present invention is specifically described.
The Eddy Current Type surveying instrument C of this example is made up of main shaft 1, Magnmet rotor 2, rotor 3, pointer 4, needle pivot 5 and framework 6.Speed detector W is made up of magnetic detecting element 7, circuit substrate 8 and maintaining part 9.Speed detector W is fixed on Eddy Current Type surveying instrument C by screw 10.
The rotation of the wheel of vehicle by not shown flexible cable transmission is passed to Magnmet rotor 2 by main shaft 1.Its by cylindrical shell 1a and parts of bearings 1b rotatably axle be supported on the diapire described later of framework 6.
Magnmet rotor 2 by magnet 2a, the ring-type relative with this magnet 2a soft magnetic bodies 2b, keep the shell 2c of the nonmagnetic body of this soft magnetic bodies 2b to form.Magnmet rotor 2 is close to the upper end of main shaft 1.
Rotor 3 is arranged to leave the mode in a little space with the magnet 2a of Magnmet rotor 2.The current vortex effect that rotor 3 produces because of the rotation of Magnmet rotor 2 and in rotary moving.It produces the rotary torque proportional with the rotational speed of Magnmet rotor 2.The center of rotor 3 is provided with the needle pivot 5 being mounted with pointer 4.
The upper end of needle pivot 5 is fixed in pointer 4 press-in, and it rotates together with the needle pivot 5 being loaded into rotor 3, and shows the speed of vehicle.
Needle pivot 5 erection has the following framework of framework 6, by the not shown upside bearing of this framework and be arranged at main shaft 1 upper-center lower side bearing 1c and supported by axle.The lower position of below the central authorities of needle pivot 5 is fixed in the inner of hairspring 11, and the peg 12 being arranged at framework is fixed in its outer end.
Framework 6 is made up of metal materials such as cold rolling steel plates (such as SPCC), and the section configuration with two sidewall 6a and diapire 6b is U-shaped, and framework 6c is set up in the upper end of the outer wall 6a of two.Framework 6 keeps each component parts such as main shaft 1, Magnmet rotor 2 and rotor 3.
Magnetic detecting element 7 between Magnmet rotor 2 and the diapire 6b of framework 6, and near Magnmet rotor 2.In this example, it is located in the mode relative with below Magnmet rotor 2, and is installed on circuit substrate 8 with magnetic force detection faces with described relative mode below.Magnetic detecting element 7 is arranged at framework 6 by maintaining part 9.The change in the magnetic field that magnetic detecting element 7 detects the rotation with Magnmet rotor 2 and produces, convert the change in this magnetic field to electric signal, and this electric signal is exported to the control device (engine control assembly: hereinafter referred to as ECU) being equipped on vehicle (motorcycle).
Circuit substrate 8 is provided with not shown electronic unit such as resistance, capacitor etc. that protection magnetic detecting element 7 do not affect by extraneous noise etc.Above-mentioned ECU is connected by not shown electric wire.Circuit substrate 8 is fixed on maintaining part 9 by screw 9i.
Maintaining part 9 is made up of following: base portion 9a; Be arranged at the 1st wrist sheet at the two ends of this base portion 9a, the 2nd wrist sheet 9b, 9c; Connect vertical setting unit 9d, the 9e of base portion 9a and the 1st wrist sheet, the 2nd wrist sheet 9b, 9c.Described each wrist sheet 9b, 9c are fixed on the sidewall 6a of framework 6 respectively by the 1st screw, the 2nd screw 10a, 10b.In addition, this vertical setting unit 9d, 9e are contacted with the sidewall 6a of framework 6, and when being fixed by the 1st screw, the 2nd screw 10a, 10b, framework 6 is difficult to displacement relative to maintaining part 9.
The downside of base portion 9a is formed with the stage portion 9f on the diapire 6b of framework 6.In addition, in base portion 9a, as the positioning element of installation site determining circuit substrate 8, there are two bolt 9g.Described bolt 9g can be arranged at the hole of circuit substrate 8 by through and determined the installation site of circuit substrate 8 relative to 9a.
As shown in Figure 1, Figure 2, Figure 4 shows, the 1st wrist sheet 9b is relative to the 2nd wrist sheet 9c, and such as, in the turning axle direction of Magnmet rotor 2, in lower position, and as shown in Figure 2 and Figure 4, the 1st wrist sheet 9b is longer than the 2nd wrist sheet 9c.That is, in the vertical direction relative to base portion 9a longitudinal direction, and longer in axial vertical direction formation is rotated relative to Magnmet rotor 2.In addition, the hole 9h that each screw 10 passes through is respectively equipped with in each wrist sheet 9b, 9c.
The mode that maintaining part 9 is positioned on the connecting line L of the installation site X of the 1st screw 10a and the installation site Y of the 2nd screw 10b with magnetic detecting element 7 is arranged at framework 6.
The installation site X of the 1st screw 10a is different relative to the axial height of the rotation of Magnmet rotor 2 from the installation site Y of the 2nd screw 10b.
In addition, the installation site X of the 1st screw 10a is different relative to the position of the vertical direction of the turning axle of Magnmet rotor 2 from the installation site Y of the 2nd screw 10b.
By forming in the above described manner, can by reducing number of components and reduced cost and maintaining stable accuracy of detection.In addition, turning axle when turning axle when the 1st screw 10a rotates and the 2nd screw 10b rotate is not on the same line.Namely the 1st screw 10a is parallel with the 2nd screw 10b, the rotation of screw 10a, 10b when maintaining part 9 being fixed to framework 6 can be suppressed and the displacement of the magnetic detecting element 7 caused, keep magnetic detecting element 7 certain with the distance of Magnmet rotor 2 always, thus the stable velocity measuring of high-quality can be carried out.
In addition, by arranging vertical setting unit 9d, 9e, relative to framework 6, the vertical setting unit 9d of maintaining part 9,9e are contacted with the sidewall 6a of framework 6, can suppress the driven of the maintaining part 9 produced during tighten the screws and the displacement of the sense of rotation caused.
In addition, by the position of the magnetic detecting element be arranged on circuit substrate 87 being arranged on the connecting line L of two screws 10a, 10b maintaining part 9 being fixed on framework 6, even if maintaining part 9 is driven along with the rotation of screw 10a, 10b, because magnetic detecting element 7 is arranged on the turning axle of screw 10a, 10b, so the displacement of magnetic detecting element 7 can be suppressed, the speed detector in the Eddy Current Type surveying instrument of the magnetic force accuracy of detection that can remain stable can be provided.
Industry utilizes possibility
The present invention can be used in the Eddy Current Type surveying instrument with speed detector.
Symbol description
Label 1 represents main shaft;
Label 2 represents Magnmet rotor;
Label 3 represents rotor;
Label 4 represents pointer;
Label 5 represents needle pivot;
Label 6 represents framework;
Label 7 represents magnetic detecting element;
Label 8 indication circuit substrate;
Label 9 represents maintaining part;
Label 9b, 9c represent wrist sheet;
Label 9d, 9e represent vertical setting unit;
Label 10a represents the 1st screw;
Label 10b represents the 2nd screw;
Label C represents Eddy Current Type surveying instrument;
Label W represents speed detector;
Label X, Y represent installation site.
Claims (3)
1. the speed detector in Eddy Current Type surveying instrument, this Eddy Current Type surveying instrument has: the Magnmet rotor rotated together with main shaft; The rotor rotated with the rotation of Magnmet rotor; Be fixed on rotor and the needle pivot of pointer is housed; Fixed main shaft is also provided with the framework of Magnmet rotor and rotor, and it is characterized in that, the speed detector in this Eddy Current Type surveying instrument has: be arranged at the magnetic detecting element near above-mentioned Magnmet rotor; Be provided with the circuit substrate of above-mentioned magnetic detecting element; Foregoing circuit substrate is held in the maintaining part of above-mentioned framework, a pair wrist sheet is provided with in above-mentioned maintaining part, described each wrist sheet is fixed on above-mentioned framework by the 1st screw, the 2nd screw, and above-mentioned magnetic detecting element is positioned on the connecting line of the installation site of above-mentioned 1st screw and the installation site of above-mentioned 2nd screw.
2. the speed detector in Eddy Current Type surveying instrument according to claim 1, is characterized in that, the installation site of above-mentioned 1st screw is different at the axial height of the rotation of above-mentioned Magnmet rotor from the installation site of above-mentioned 2nd screw.
3. the speed detector in Eddy Current Type surveying instrument according to claim 1 and 2, it is characterized in that, the installation site of above-mentioned 1st screw is different relative to the position of the vertical direction of the turning axle of above-mentioned Magnmet rotor from the installation site of above-mentioned 2nd screw.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011122534A JP5703970B2 (en) | 2011-05-31 | 2011-05-31 | Velocity detector in eddy current type instrument. |
| JP2011-122534 | 2011-05-31 | ||
| PCT/JP2012/060202 WO2012165065A1 (en) | 2011-05-31 | 2012-04-16 | Speed detection device of eddy current meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103547929A CN103547929A (en) | 2014-01-29 |
| CN103547929B true CN103547929B (en) | 2015-04-08 |
Family
ID=47258929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280024591.5A Active CN103547929B (en) | 2011-05-31 | 2012-04-16 | Speed detection device of eddy current meter |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5703970B2 (en) |
| CN (1) | CN103547929B (en) |
| WO (1) | WO2012165065A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112018003074T5 (en) * | 2017-06-14 | 2020-02-27 | Mitsubishi Electric Corporation | Current detection device and power conversion device |
| US11293949B2 (en) | 2017-06-14 | 2022-04-05 | Mitsubishi Electric Corporation | Current detection apparatus and power conversion apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1081256A (en) * | 1992-07-08 | 1994-01-26 | 李扬荣 | A kind of speed of a motor vehicle meter that can export the real-time speed pulse signal |
| US5487303A (en) * | 1992-07-08 | 1996-01-30 | Li; Yang R. | Speedometer capable of providing real-time speed pulse signals |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2584490B1 (en) * | 1985-07-05 | 1987-10-16 | Veglia | METHOD FOR DISPLAYING THE SPEED AND DISTANCE ON BOARD A MOTOR VEHICLE. |
| JPS6259865U (en) * | 1985-10-04 | 1987-04-14 | ||
| JPS6388752U (en) * | 1986-11-29 | 1988-06-09 | ||
| JP3028091B2 (en) * | 1998-01-07 | 2000-04-04 | 日本精機株式会社 | Velocity detection device for eddy current instruments |
-
2011
- 2011-05-31 JP JP2011122534A patent/JP5703970B2/en active Active
-
2012
- 2012-04-16 WO PCT/JP2012/060202 patent/WO2012165065A1/en active Application Filing
- 2012-04-16 CN CN201280024591.5A patent/CN103547929B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1081256A (en) * | 1992-07-08 | 1994-01-26 | 李扬荣 | A kind of speed of a motor vehicle meter that can export the real-time speed pulse signal |
| US5487303A (en) * | 1992-07-08 | 1996-01-30 | Li; Yang R. | Speedometer capable of providing real-time speed pulse signals |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103547929A (en) | 2014-01-29 |
| JP5703970B2 (en) | 2015-04-22 |
| JP2012251788A (en) | 2012-12-20 |
| WO2012165065A1 (en) | 2012-12-06 |
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| C14 | Grant of patent or utility model | ||
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