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Rotation detector

A technology of rotation detection and rotation axis, which is applied in measuring devices, using electric/magnetic devices to transfer sensing components, converting sensor outputs, etc., can solve the problem of inability to detect the deviation of the rotation axis

Inactive Publication Date: 2011-05-04
KK TOKAI RIKA DENKI SEISAKUSHO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, according to the above-mentioned conventional rotation detection device, it is only a device for determining the correction value of the output value of the magnetic sensor used to obtain the rotation angle, and there is a problem that it cannot detect what kind of axis deviation occurs with respect to the rotation axis. question

Method used

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no. 1 approach

[0024] figure 1 It is a schematic diagram showing a structural example of the appearance of the rotation detection device according to the first embodiment of the present invention.

[0025] The rotation detection device 1 has a sensor S that measures the distance from the bevel gear portion 20 of the gear 2 and outputs a voltage value corresponding to the distance. 1 and S 2 ; and based on sensor S 1 and S 2 The measured distance detects the internal circuit of the rotation speed of the gear 2, the deviation of the rotation axis, and the like. In addition, the rotation detection device 1 is connected to the drive unit 3 and outputs the detected rotation speed and the like for feedback.

[0026] Sensor S 1 and S 2 It is a magnetic or optical distance sensor. For example, a distance sensor that outputs a small voltage value when the distance is large and a large voltage value when the distance is small is used.

[0027] The gear 2 has a bevel gear portion 20 on the rotat...

no. 2 approach

[0086] The second embodiment differs from the first embodiment in that the sensor S 1 and S 2 They are arranged at positions where the off-angles of the xy plane around the rotation axis 2A are different.

[0087] Figure 10 (a) and (b) are schematic diagrams showing a configuration example of the gear 2 according to the second embodiment, (a) is a side view, and (b) is a front view.

[0088] Sensor S 1 Set at the left end of the bevel gear 20, used to measure the distance d from the bevel gear 20 1 . In addition, the sensor S 2 It is installed at the right end of the figure of the bevel gear part 20, and is used to measure the distance d from the bevel gear part 20 2 . In addition, the sensor S 1 and S 2 , arranged at positions where the off-angle of the xy plane centered on the rotation axis 2A is shifted.

[0089] Figure 11 (a) and (b) are schematic diagrams showing the operation when the gear 2 is misaligned, (a) is a schematic diagram showing an example when t...

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Abstract

The present invention provides a rotation detector, capable of detecting offset of a rotation axis and detecting an accurate rotation of the rotation axis corresponding to the detected offset. The rotation detector (1) includes a first distance sensor S1 disposed to face a gear (2) with a gear portion (20) formed non-parallel to the rotation axis (2A) for continuously measuring a distance from the gear portion (20); a second distance sensor S2 disposed to face the gear (2) at a position different from the first distance sensor S1 in a direction of the rotation axis (2A) for continuously measuring a distance from the gear portion (20); and an axis shift detecting portion (12) for detecting an axis shift of the rotation axis (2A) based on a variation in the distance measured by at least one of the first and second distance sensors S1, S2.

Description

technical field [0001] The present invention relates to a rotation detection device. Background technique [0002] As a conventional rotation detecting device, there is known a device capable of measuring a rotation angle with high accuracy even if an axis misalignment occurs (for example, refer to Patent Document 1). [0003] The rotation detecting device described in this patent document 1 has: a magnetic sensor that detects a magnetic field generated by a disk-shaped magnet connected to a rotating shaft; a storage unit that stores an output value output from the magnetic sensor; Calculation unit that obtains the rotation angle of the rotation axis. The calculation unit stores the output of the magnetic sensor for each rotation angle obtained by rotating the rotation shaft with a first axis deviation as data 1 in the storage unit, and also stores the output obtained by rotating the rotation shaft with a second axis deviation. The output of the magnetic sensor for each ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/12
CPCG01D5/24476G01D5/2448
Inventor 竹内修一
Owner KK TOKAI RIKA DENKI SEISAKUSHO
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