KR890009273Y1 - Rotary phase detecting system - Google Patents

Abstract

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Description

Cylindrical rotation angle position detection device

FIG. 1 (a) is an exploded perspective view of a conventional detection device, FIG. 1 (b) is a magnetic force line direction diagram according to the polarity of the circular annular magnet 6 shown in FIG. 1 (a), and FIG. 1 (c) is the first (a) Magnetic force line direction view from the front in the assembled state of the figure.

FIG. 2 (a) is an exploded perspective view of the detection device of the present invention, FIG. 2 (b) is a perspective view of the circular annular magnet 7 shown in FIG. 2 (a), and FIG. 2 (c) is different from FIG. 2 (b). As an example, a perspective view of a circular annular magnet 8, a plan view of FIG. 2 (d) or FIG. 2 (b), a plan view of FIG. 2 (e) or FIG. 2 (c), and a second plan of FIG. b) is a state in which the circular ring magnets 7 and 8 of FIG. 2 (c) are unfolded in a straight line, and FIG. 2 (g) is a direction diagram showing the direction of the magnetic lines in the front when the assembly state of FIG. FIG. 2 (h) is an output voltage characteristic diagram of the Hall Effect element 10 according to the angle or number at the time of rotation of the most cylindrical cylinder 1 of FIG.

* Explanation of symbols for main parts of the drawings

1: rotating cylinder 2: disc

3,4,5: Hole 6,7,8: Circular ring magnet

10: Hall effect element 11: magnetic shield plate

12: axis 13,14,15: outer peripheral surface

16, 17, 18: inner side 19: element support

The present invention relates to a cylindrical rotation angle position detection device to accurately detect the number according to the rotation angle and the rotation angle of the rotation cylinder when the rotation of the rotating cylinder with a circular ring magnet.

Conventionally, when using a detection device composed of a plurality of rotating cylinders, the magnetic force of the magnets installed inside each rotating cylinder causes mutual interference, and there is a disadvantage in that a magnetic shielding plate must be installed to prevent the interference. By attaching the Hall effect element for magnetic sensing, the size of the product is increased and there is a considerable difficulty in mass production.

The present invention solves such a conventional problem will be described in detail based on the accompanying drawings as follows.

FIG. 1 (c) is an assembly front view of a conventional detection device, in which a plurality of rotating cylinders 1 are provided, and a circular ring magnet coupled to a disk 2 as shown in FIG. 1 (a) inside the rotating cylinder 1. (6) is installed and the magnetic shield plate 11 is installed between the rotating cylinder (1) and the adjacent rotating cylinder (1), the home effect element (10) is attached to one side of the disk of the magnetic shield plate (11) have.

In addition, the shaft 12 is coupled to the holes 3, 4, 5 to enable rotation of the rotary cylinder 1 on the shaft 12, and the shield plate 11 is fixed.

Hereinafter, the operation and effect of the conventional detection device will be described.

When the rotating cylinder 1 rotates under power, the circular ring magnet 6 installed inside the rotating cylinder 1 rotates at the same time.

At this time, the hole effect element 10 attached to one side of the circumferential surface of the magnetic cylinder plate 11 adjacent to the rotating cylinder 1 detects a change in the intensity of the magnetic field of the circular annular magnet 6.

The polarity of the circular annular magnet 6 is the N pole (or S pole) and the right side is the S pole (or N pole). Therefore, the magnetic force line exits the N pole and enters the S pole to the left and right sides of each rotating cylinder 1. Magnetic lines of force are formed.

Therefore, in the detection device composed of a plurality of rotating cylinders 1 as shown in FIG. 1 (c), mutual magnetic interference is caused by the polarity of the circular annular magnet 6 installed inside the adjacent rotating cylinder 1. Therefore, in order to prevent such interference of magnetic force, there was a disadvantage in that the magnetic shield plate 11 should be installed, and the output voltage characteristics were also non-linear, so that accurate measurement was difficult.

In addition, since the Hall effect element 10 should be attached to one side of the magnetic shield plate 11, there was a considerable difficulty in assembling the product during mass production, and the volume of the product was widened, which was not good in appearance.

2 (e) is a front view of the assembly of the detection device according to the present invention when explaining the configuration and effect as follows.

The Hall effect element 10 is provided on the support 19 so as to maintain a minute distance from the outer circumferential surface 13 of the rotating cylinder 1, and a wedge-shaped magnet as shown in FIG. d), when wound in a circular shape as shown in FIG. 2 (e), the circular annular magnets 7 and 8 are formed to gradually increase (or decrease) the longitudinal area, and the circular annular magnets 7 ( 8, the outer peripheral surface 14, 15 is the N pole (or S pole) inner surface 16, 17 is the S pole (or N pole) as shown in Fig. 2 (g) as shown in Fig. 2 (g) Since the circular ring magnets 7 and 8 formed inside the rotating cylinders 1 and 10 are respectively formed only above and below the rotating cylinders 1, the magnetic effect is hardly influenced by the Hall effect element 10. As shown in the drawing, the magnetic shielding plate 11 is not required, and the rotation angle and number of the cylinder can be detected accurately.

As another embodiment, the shape of the circular ring magnets 7 and 8 may use various shapes such as trapezoidal, circular, and semicircular in addition to the rectangular shape of the longitudinal section.

As described above, the present invention does not require the installation of a magnetic shielding plate between the respective rotating cylinders, and the interference due to the polarity of the circular ring magnet installed inside each rotating cylinder does not interact with each other, so that the rotation angle of the rotating cylinder 1 and There is an advantage that the number can be accurately detected as shown in FIG. 2 (h).

Claims (2)

As shown in the drawing, in the detection device composed of a circular annular magnet 6 and a hall effect element 10 provided inside the rotating cylinder 1, the Hall effect element 10 is formed on the outer circumferential surface of the rotating cylinder 1 ( 13) is installed on the support 19 so as to maintain a fine spacing, and the outer circumferential surfaces 14 and 15 of the circular ring magnets 7 and 8 have an N pole (or S pole) inner surface 16 ( 17) is a cylindrical rotation angle position detection device, characterized in that the S pole (or N pole). 2. A cylindrical rotation angle position detection device according to claim 1, characterized in that the longitudinal area of the circular ring magnet (7) (8) is shaped to gradually increase (or decrease).