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Position detection device

A detection device and reference line technology, which can be used in measuring devices, using optical devices to transmit sensing components, and using electrical/magnetic devices to transmit sensing components, etc., which can solve the problems of contact deterioration, contact wear, and short life.

Pending Publication Date: 2021-08-27
METROL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, such a conventional position detection device has a problem of short life due to deterioration of contacts due to repeated mechanical switching.
In addition, there is a problem that the conduction between the contacts is poor due to the contamination of foreign matter or the formation of an oxide film, or there is a problem that the detection accuracy decreases due to wear and tear of the contacts due to repeated contact.

Method used

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Embodiment Construction

[0016] Below, refer to Figure 1 to Figure 4 , an embodiment of the position detection device according to the present invention will be described in detail. In addition, in Figure 1 to Figure 4 In , the same symbols are attached to the same or corresponding structural elements, and repeated explanations are omitted. In addition, in Figure 1 to Figure 4 In the drawings, the ratio or size of each constituent element may be exaggerated, and some constituent elements may be omitted.

[0017] figure 1 It is a schematic diagram showing the configuration of the position detection device 1 according to the first embodiment of the present invention. like figure 1 As shown, the position detection device 1 of this embodiment includes: a fixed part 10; a pair of magnetic sensors 21, 22, which are fixed on the fixed part 10; a detection part 30, which is connected to the magnetic sensors 21, 22 via a signal line 12; And a magnet 40 mounted on the movable body 2 moved by detecting ...

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PUM

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Abstract

Provided is a position detection device that can stably detect a position with high detection precision over a long lifespan. A position detection device 2 is provided with a magnet 40 configured so as to move, together with a movable body 2, on a movement path M extending along the X-direction. The magnet 40 has different magnetic poles 41, 42 in the Z-direction. The position detection device 2 is provided with a pair of magnetic sensors 21, 22 that are separated by equal distances, in the Z-direction, from the movement path M, and that are disposed at equal distances from a reference line S extending in the Z-direction. The magnetic sensors 21, 22 have the same sensor characteristics. The position detection device 2 is provided with a detection unit 30 that is configured so as to detect that the magnet 40 is positioned on the reference line S when the outputs of the magnetic sensors 21, 22 match.

Description

technical field [0001] The invention relates to a position detection device, in particular to a position detection device for detecting the position of a movable body. Background technique [0002] For example, in a machine tool such as a machining center, it is necessary to detect the initial position of the tool in order to achieve precise machining. As a position detection device for detecting the position of a movable body moved by a detection target such as a tool, a device that mechanically switches electrical contacts corresponding to the movement of the movable body is known (for example, refer to Patent Document 1). [0003] However, such a conventional position detection device has a problem of short life due to degradation of contacts due to repeated mechanical switching. In addition, there is a problem that poor conduction between contacts occurs due to contamination of foreign matter or formation of an oxide film, or deterioration of detection accuracy occurs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/244G01D5/36
CPCG01D5/145G01D5/34
Inventor 吉冈崇元菅野隆行
Owner METROL CO LTD
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