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Multi-rotation encoder

A technology of rotary encoder and rotating shaft, applied in the direction of converting sensor output, instruments, measuring devices, etc., can solve the problems of rising cost, difficulty in high durability, poor maintenance of backup batteries, etc., and achieve the effect of accurate detection

Inactive Publication Date: 2014-12-24
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem of poor maintainability due to periodic replacement of the backup battery
[0005] On the other hand, in the former method, since the number of revolutions is counted and stored mechanically, it has the advantage of being able to store the number of revolutions regardless of the presence or absence of an external power supply, but there are complex structures, increased costs, and difficulties in achieving high speed. The issue of durability

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0042] figure 1 The configuration of the batteryless multi-rotary encoder 101 according to Embodiment 1 of the present invention is shown in . The batteryless multi-rotary encoder 101 of this embodiment is a multi-rotary encoder that detects and stores the rotation direction and the number of revolutions of the rotary shaft without receiving power supply from the outside, and is roughly classified into: a rotation detection mechanism 110; The processing circuit 120 is electrically connected to the rotation detection mechanism 110 .

[0043] Such as figure 2 As shown, the rotation detection mechanism 110 has a magnet 111 and detection coils 112 and 113 , and is configured to detect the rotation of a rotation shaft 115 . In addition, the rotating shaft 115 corresponds to, for example, an output shaft (rotating shaft) of a motor, etc., but is not limited thereto, and may correspond to a rotating body rotatable about an axial direction.

[0044] The magnet 111 has a disc shap...

Embodiment approach 2

[0068] refer to Figure 8 The batteryless multi-rotary encoder 102 according to Embodiment 2 of the present invention will be described.

[0069] The batteryless multi-rotary encoder 102 of the present embodiment also includes a rotation detection mechanism 110 , and a signal processing circuit electrically connected to the rotation detection mechanism 110 , as in the aforementioned batteryless multi-rotation encoder 101 . The battery-less multi-rotation encoder 102 of this embodiment is different from the above-described battery-less multi-rotation encoder 101 in that it includes a signal processing circuit 131 instead of the signal processing circuit 120 . In addition, the difference between the signal processing circuit 120 and the signal processing circuit 131 is that the nonvolatile memory 127 is arranged outside the signal processing circuit. Other configurations of the signal processing circuit 131 are the same as those of the signal processing circuit 120 .

[0070] ...

Embodiment approach 3

[0072] refer to Figure 9 The batteryless multi-rotary encoder 103 according to Embodiment 3 of the present invention will be described.

[0073] The battery-less multi-rotary encoder 103 of this embodiment also has a rotation detection mechanism 110 and a signal processing circuit electrically connected to the rotation detection mechanism 110 similarly to the above-mentioned battery-less multi-rotation encoder 101 . The battery-less multi-rotary encoder 103 of the present embodiment is different from the battery-less multi-rotary encoder 101 described above in that it includes a signal processing circuit 132 instead of the signal processing circuit 120 . The difference between the signal processing circuit 120 and the signal processing circuit 132 is that the full-wave rectification circuit 121 and the constant voltage circuit 122 are arranged between the rotation detection mechanism 110 and the signal processing circuit 132 outside the signal processing circuit. Other confi...

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Abstract

A multi-rotation encoder having detection coils (112, 113) having a Barkhausen effect, wherein a rotation detection mechanism (110) and a signal processing circuit (120) are provided, the detection coils generate positive / negative opposite-sign voltage pulses and transmit the voltage pulses to the signal processing circuit, the signal processing circuit has a controller (125) for storing the state of the detection coils as high or low in a memory (127) and maintaining the high or low state on the basis of the positive or negative sign of the voltage pulses and whether a voltage pulse is not being generated, and an adder (126) for updating a number of rotations in accordance with changes in the state of the detection coils, and the rotation angle of a rotary shaft is determined to within approximately 1 / 4 rotation units.

Description

technical field [0001] The present invention relates to a multi-rotation encoder capable of detecting and storing the rotation direction and the number of revolutions of a rotating body in a motor or the like without receiving external power supply. Background technique [0002] Generally, for example, a rotary encoder for detecting the rotation angle of a motor rotating shaft is composed of a turntable connected to the motor rotating shaft and having an optical pattern or a magnetic pattern formed thereon, and a detection element for reading the Optical patterns or magnetic patterns. For this kind of rotary encoder, the following method is known, that is, an incremental encoder that detects the rotation angle of the rotary shaft by integrating the pulse signals detected by the detection element, and a rotary encoder that detects the rotation angle of the rotary shaft according to the number of different numbers on the turntable. An absolute value encoder that detects the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/244G01D5/245
CPCG01D5/2013G01D5/00G01D5/244G01D5/245G01B7/30G01D5/12
Inventor 井上甚武舍武史西泽博志仲岛一武内良祐井藤达也平位隆史永田启史
Owner MITSUBISHI ELECTRIC CORP
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