JPH09113317A - Hybrid rotation detector and detecting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an impact resistant detector by a structure wherein a winding type rotation detector performs detection within single revolution of a rotary shaft whereas a detector for detecting the rotation of a rotary encoding plate detects multiple rotations of rotary shaft. SOLUTION: A winding type rotation detector 2 is mounted on a base 1 and the hollow shaft 2A thereof is coupled with a rotary shaft 3 and then a stainless steel rotary encoding plate 4 is secured to the upper end thereof. Supports 7, 6 for light receiving section 7 and light emitting section 8 are also mounted on the base 1. The light receiving section 7 and light emitting section 8 are disposed on the opposite sides of encoding plate 4 and constitute a rotation detector 9 therefor. The detector 9 detects one code of the encoding plate 4 to produce a pulse per single revolution thus detecting multiple rotations of the rotary shaft 3. The rotary shaft 3 is coupled through the hollow shaft 2A with a motor shaft 10 and the detector 2 detects the rotational angle within a single revolution. Consequently, detection of motor shaft 10 within single revolution can be performed simultaneously with detection of multiple rotations using the rotation detection signals from the detectors 2, 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid type rotation detector and a rotation detection method, and more particularly, to detection within one rotation of a rotation shaft by a winding type detector, and to perform multiple rotations of the rotation shaft by an optical or magnetic method. The present invention relates to a new improvement to be performed on the detector.

[0002]

2. Description of the Related Art As a conventional rotation detecting method, an optical absolute encoder is generally used, and an output panes is counted by a counter, so that the rotation axis
In-rotation detection and multi-rotation detection were performed.

[0003]

In the conventional rotation detecting method, since the optical absolute encoder is used, the rotary code plate and the grating are made of glass, and the rotary code plate, the grating and the optical detector are used. Since they are arranged close to each other with an extremely small gap, they cannot absorb the displacement of the rotating shaft of the motor, and are not suitable for mass production. Further, since glass is used, it is weak against impact and is not suitable for applications with large impact.

The present invention has been made to solve the above problems, and in particular, the detection of the rotation shaft within one rotation is performed by a wire-wound rotation detector, and multiple rotations of the rotation shaft are performed by an optical or magnetic method. It is an object of the present invention to provide a hybrid type rotation detector and a rotation detection method which are performed by a detection device of the formula.

[0005]

A hybrid type rotation detector according to the present invention comprises a winding type rotation detector provided on a base and a rotation code provided on a rotation shaft provided on the winding type rotation detector. A plate, and a detector provided on the base for detecting the rotation of the rotation code plate, the winding type rotation detector detects the rotation shaft within one rotation, and multi-rotation of the rotation shaft is performed. This is a configuration in which the detection object is used for detection.

More specifically, the wire-wound rotation detector is composed of a resolver, and the detection body is composed of an optical light emitting part and a light receiving part.

The rotation detection method according to the present invention uses a wire-wound rotation detector and an optical or magnetic detector for detecting the rotation of the rotary shaft of the wire-wound rotation detector, and This is a method in which detection is performed within one rotation of the rotation shaft, and the detection body detects multiple rotations of the rotation shaft.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a hybrid type rotation detector and a rotation detection method according to the present invention will be described in detail below with reference to the drawings. A reference numeral 1 in FIG. 1 is a base, and a winding type rotation detector 2 including a known resolver or the like is provided on the base 1. The rotary shaft 3 connected to the hollow shaft 2A of the wire-wound type rotation detector 2 is extended upward, and the upper end of the rotary shaft 3 is made of a stainless steel plate. 4 are integrally attached. The base 1
L-shaped first and second supports 5 and 6 are provided on the upper side,
A light receiving portion 7 is provided at the tip of the first support body 5, and a light emitting portion 8 such as an LED is provided at the tip of the second support body 6. The light receiving portion 7 and the light emitting portion 8 are arranged so as to sandwich the rotary code plate 4, and also constitute a detector 9 for detecting the rotation of the rotary code plate 4. The detection body 9 is configured to detect one code formed on the rotary code plate 4 and output one pulse for one rotation, and to detect multiple rotations of the rotary shaft 3 by detecting this one pulse. Is configured. The detection body 9 is of a magnetic type in which the rotary code plate 4 is of a magnetic type (for example, a magnet is formed at one place of a disk) and the light receiving part 7 or the light emitting part 8 is a magnetic sensor. Also in this case, multiple rotations of the rotary shaft 3 can be detected.

Next, the operation will be described. First, in the configuration of FIG. 1 described above, the winding type rotation detector 2 is configured by a well-known hollow shaft 2A type, and the rotation shaft 3 and the motor shaft 10 are connected via the hollow shaft 2A. . When the motor shaft 10 rotates in this state, the hollow shaft 2A and the rotary shaft 3 also rotate at the same time.
The in-rotation detection is detected by the winding type rotation detector 2 and
The rotation angle within the rotation is detected as an absolute value, and the known A /
It is converted into a digital value by the R / D converter which is a D converter.

Further, the rotation of the rotary shaft 3 is detected by the pulse detected from the detector 9 by one rotation of the rotary code plate 4, and a number of pulses corresponding to the number of rotations of the rotary shaft 3 is obtained.
Multiple rotations of the rotating shaft 3 (rotation speed) by detection of this pulse
Can be detected. Therefore, the winding type rotation detector 2
By the rotation detection signal from the motor and the rotation detection signal from the detector 9, multi-rotation of the motor shaft 10 and detection within one rotation can be performed at the same time.

[0011]

As described above, the hybrid type rotation detector and the rotation detecting method according to the present invention perform the detection within one rotation by the winding type rotation detector and detect the multiple rotations by the rotation code plate and the detector. Therefore, unlike the conventional structure, the rotary code plate and the detector have a rough structure with a sufficient gap, absorb the displacement of the motor shaft sufficiently, and have a strong shock resistance and an inexpensive rotation. A detector can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a hybrid type rotation detector according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Winding type rotation detector 3 Rotation axis 4 Rotation code plate 7 Light receiving part 8 Light emitting part 9 Detector

Claims (3)

[Claims] 1. A wire-wound rotation detector provided on a base (1)
(2) and the rotary shaft provided in the winding type rotation detector (2)
(3) is provided with a rotation code plate (4), the base (1) is provided with a detection body (9) for detecting the rotation of the rotation code plate (4), the winding type rotation detection Hybrid rotation detection, characterized in that the rotation axis (3) is detected within one rotation by the device (2), and multiple rotations of the rotation axis (3) are detected by the detection body (9). vessel. 2. The winding type rotation detector (2) is composed of a resolver, and the detection body (9) is an optical light emitting part (7) and a light receiving part.
The hybrid type rotation detector according to claim 1, characterized in that it comprises (8). 3. A winding type rotation detector (2) and an optical or magnetic detection body (9) for detecting the rotation of a rotation shaft (3) of the winding rotation detector (2), The linear rotation detector (2) detects within one rotation of the rotating shaft (3), and the detection body (9)
The rotation detection method is characterized by detecting multiple rotations of the rotating shaft (3).