CN201628538U

CN201628538U - Non-contact rotation angle sensor

Info

Publication number: CN201628538U
Application number: CN2010201198303U
Authority: CN
Inventors: 林哲然
Original assignee: 林颖; 陈余峰; 吴克刚
Priority date: 2010-01-30
Filing date: 2010-01-30
Publication date: 2010-11-10
Anticipated expiration: 2020-01-30

Abstract

The utility model relates to a sensor used for measuring throttle valve rotation angle in an automobile or motorcycle electric control system, in particular to a non-contact rotation angle sensor, which comprises a casing. A bearing is arranged inside the casing, a rotary shaft is arranged on the bearing, one end of the rotary shaft extends from the casing, and a rotating body is fixedly connected to the other end of the rotary shaft. A circular groove and an annular sealed groove concentric to the same are disposed in the center of the rotating body, an annular magnet yoke and two symmetric arc permanent magnets are concentrically arranged in the annular sealed groove, the annular magnet yoke is closely connected onto the outer wall of the annular sealed groove, the two arc permanent magnets are symmetrically and closely connected between the annular magnet yoke and the annular sealed groove, and one face of one of the two arc permanent magnet and one opposite face of the other arc permanent magnet are respectively provided with an N pole and an S pole of the permanent magnets. A Hall element is arranged inside the casing and positioned inside the circular groove in the center of the rotating body, and the Hall element does not contact with the circular groove. The non-contact rotation angle sensor has the advantages of high measurement precision, no contact, no abrasion, practicality, reliability and the like.

Description

Non-contact type rotating angle sensor

Technical field

The utility model is to be used to measure the sensor that the air throttle corner is used, particularly a kind of non-contact type rotating angle sensor in a kind of automobile or the motorcycle electric-control system.

Technical background

The effect of the angular sensor of engine air throttle is that the position of air throttle or aperture are changed into electric signal, passes to ECU (Electrical Control Unit) (ECU), judges the foundation of engine operation condition as ECU (Electrical Control Unit).

The angular sensor of available engine air throttle adopts " potentiometer " formula angular transducer mostly, and its major defect is that potentiometer carbon membrane or conductive plastics film wear and tear easily, make brush along with vibration, cause gyration working sensor instability, reliability is not high, and the life-span is short.

The patent No. is 200920037068.1, name be called " the motorcycle digital throttle position sensor " and patent in, be to adopt the Hall-type element to measure the air throttle corner, because this patented technology does not adopt the yoke of magnetic conduction, so DISTRIBUTION OF MAGNETIC FIELD is just inhomogeneous, and the setting of magnet is 90 ° of scopes and arranges, so the magnetic flux by the Hall element sensitive surface just can not appear as zero situation, cause the electric signal by the Hall element induction, its linear characteristic will not be clearly.

Summary of the invention

It is not high that the purpose of this utility model is to overcome existing " potentiometer " formula angular transducer job insecurity reliability, and the unconspicuous defective of the existing inhomogeneous linear characteristic of Hall-type angular transducer Distribution of Magnetic Field, thereby invention is a kind of non-electric charge quantity signallings such as angle or position are changed into the non-contact type rotating angle sensor that the linear voltage realization accurately takes measurement of an angle and changes.

The purpose of this utility model realizes as follows: described non-contact type rotating angle sensor, include housing, be provided with a bearing in the housing, bearing is provided with a rotating shaft, one end of rotating shaft stretches out from housing, the other end of rotating shaft is connected with a rotary body, the central authorities of rotary body have the concentric therewith wreath line closes groove of a circular groove and, the concentric arc permanent magnet that is provided with annular yoke and two symmetries in the wreath line closes groove, the annular yoke is connected airtight on the outer wall of wreath line closes groove, and the connecting airtight between annular yoke and wreath line closes groove of two arc permanent magnetism iron rule symmetries, two one sides that the arc permanent magnet is relative are respectively the N utmost point and the S utmost point of permanent magnet; Be provided with a Hall element in the housing, Hall element is the circular groove that is positioned at rotary body central authorities, and between Hall element and the circular groove without any contacting.

The edge of described rotary body is provided with a projection, in housing with the corresponding position of projection on symmetry be provided with two blocks, projection and block are used for limiting rotor and can only rotate in less than 180 scopes of spending.

Described rotary body is made with non-magnet material.

Good effect of the present utility model is as follows: the utility model can be used for the measurement of angle less than 180 °, it has measuring accuracy height, untouchable, advantages such as nothing is worn and torn, practicality is reliable, life-span length, is very suitable for the measurement of the throttle opening on automobile and the motorcycle; The utility model is simple in structure, with low cost, pollution-free.

Description of drawings

Fig. 1 is the utility model structural drawing

Fig. 2 is rotor master TV structure figure

Among the figure: 3 rotating shafts of 1 housing, 2 bearings

4 rotary bodies, 5 circular grooves, 6 wreath line closes grooves

7 annular yoke 8 arc permanent magnets 9 Hall elements

10 protruding 11 blocks

Embodiment

Shown in Figure 2 as Fig. 1, described non-contact type rotating angle sensor, include housing 1, be provided with a bearing 2 in the housing 1, bearing 2 is provided with a rotating shaft 3, one end of rotating shaft 3 stretches out from housing 1, the other end of rotating shaft 3 is connected with a rotary body 4, the central authorities of rotary body 4 have a circular groove 5 and a concentric therewith wreath line closes groove 6, the concentric arc permanent magnets 8 that are provided with annular yoke 7 and two symmetries in the wreath line closes groove 6, annular yoke 7 is connected airtight on the outer wall of wreath line closes groove 6, and two arc permanent magnets 8 are connecting airtight between annular yoke 7 and wreath line closes groove 6 of symmetry then, the one side that two arc permanent magnets 8 are relative is respectively the N utmost point and the S utmost point of permanent magnet; Be provided with a Hall element 9 in the housing 1, Hall element 9 is the circular grooves 5 that are positioned at rotary body 4 central authorities, and between Hall element 9 and the circular groove 5 without any contacting.

The edge of described rotary body 4 is provided with a projection 10, in housing 1 with projection 10 corresponding positions on symmetry be provided with two blocks 11, projection 10 and block 11 are used for limiting rotor 4 and can only rotate in less than 180 scopes of spending.

Described rotary body 4 usefulness non-magnet materials are made.

During work, rotating shaft is connected with measured body, measured body rotates rotary body by rotating shaft, and then drive arc permanent magnet and the rotation of annular yoke, Hall element is maintained fixed motionless, at this moment, two block permanent magnets just in time can make the magnetic flux by the Hall element sensitive surface occur by negative-zero-just or by just-zero-negative continuous variation, so on the Hall element sensitive surface, form equally distributed magnetic field, be the linear change characteristic with regard to the electric signal that Hall element is induced like this.

Claims

1. non-contact type rotating angle sensor, include housing, be provided with a bearing in the housing, bearing is provided with a rotating shaft, one end of rotating shaft stretches out from housing, it is characterized in that: the other end of rotating shaft is connected with a rotary body, the central authorities of rotary body have the concentric therewith wreath line closes groove of a circular groove and, the concentric arc permanent magnet that is provided with annular yoke and two symmetries in the wreath line closes groove, the annular yoke is connected airtight on the outer wall of wreath line closes groove, and the connecting airtight between annular yoke and wreath line closes groove of two arc permanent magnetism iron rule symmetries, two one sides that the arc permanent magnet is relative are respectively the N utmost point and the S utmost point of permanent magnet; Be provided with a Hall element in the housing, Hall element is the circular groove that is positioned at rotary body central authorities, and between Hall element and the circular groove without any contacting.

2. non-contact type rotating angle sensor according to claim 1, it is characterized in that: the edge of described rotary body is provided with a projection, in housing with the corresponding position of projection on symmetry be provided with two blocks, projection and block are used for limiting rotor and can only rotate in less than 180 scopes of spending.

3. non-contact type rotating angle sensor according to claim 1 is characterized in that: described rotary body is made with non-magnet material.