阅读说明：本技术 位置检测装置 (Position detecting device ) 是由 清间利明 鸭木豊 小杉辰彦 于 2020-02-18 设计创作，主要内容包括：本发明提供一种位置检测装置,其构成简单且精度高。编码器(1)具备旋转检测部(11)、基准位置检测部(12)、输出部(15)、存储部(18)。旋转检测部(11)根据转子(81)的旋转位置,输出具有第一分辨率(Ri)的周期性旋转检测信号(S1)。基准位置检测部(12)检测转子(81)的旋转位置是否为给定的基准位置。在存储部(18)中,存储与旋转检测信号(S1)对应的预先设定的校正信息(19)。输出部(15)基于从旋转检测部(11)输出的旋转检测信号(S1)、基准位置检测部(12)的检测结果、存储于存储部(19)的校正信息(19),输出具有比第一分辨率(Ri)低的第二分辨率(Rt)的周期性输出信号(S2)。(The invention provides a position detection device which is simple in structure and high in precision. The encoder (1) is provided with a rotation detection unit (11), a reference position detection unit (12), an output unit (15), and a storage unit (18). The rotation detection unit (11) outputs a periodic rotation detection signal (S1) having a first resolution (Ri) according to the rotational position of the rotor (81). A reference position detection unit (12) detects whether the rotational position of the rotor (81) is a predetermined reference position. A storage unit (18) stores preset correction information (19) corresponding to the rotation detection signal (S1). The output unit (15) outputs a periodic output signal (S2) having a second resolution (Rt) lower than the first resolution (Ri) on the basis of the rotation detection signal (S1) output from the rotation detection unit (11), the detection result of the reference position detection unit (12), and the correction information (19) stored in the storage unit (19).)

1. A position detection device is characterized by comprising:

a rotating body;

a rotation detecting unit that outputs a first pulse signal having a periodicity of a first resolution according to a rotational position of the rotating body;

a reference position detecting unit that detects whether or not a rotational position of the rotating body is a predetermined reference position;

a storage unit that stores preset correction information corresponding to the first pulse signal;

and an output unit that outputs a second pulse signal having a periodicity of a second resolution lower than the first resolution based on the first pulse signal output from the rotation detection unit, the detection result of the reference position detection unit, and the correction information stored in the storage unit.

2. The position detection apparatus according to claim 1,

the output unit generates pulses of the second pulse signal based on a timing at which a pulse determined based on the correction information among the pulses of the first pulse signal is output.

3. The position detection apparatus according to claim 1 or 2,

the correction information is set to correspond to each pulse included in the first pulse signal output during a period in which the rotating body rotates in the entire rotatable range.

Technical Field

The present invention relates to a position detecting device, and more particularly to a position detecting device that outputs a signal according to a rotational position of a rotating body.

Background

For example, a position detection device is used which outputs a signal according to a rotational position (rotational angle) of a rotating body such as a rotor of a motor.

For example, patent document 1 discloses the following: in the planetary gear device, a rotation command of the servo motor is corrected based on a rotation angle correction amount corresponding to the rotation angle detected by the rotary encoder or the like at the time of input, thereby reducing a rotation angle error.

(prior art documents)

(patent document)

Patent document 1: JP-A9-311725.

Disclosure of Invention

(problems to be solved by the invention)

The invention aims to provide a high-precision position detection device with a simple structure.

(means for solving the problems)

In order to achieve the above object, according to one aspect of the present invention, a position detection device includes: a rotating body; a rotation detection unit that outputs a periodic first pulse signal having a first resolution according to a rotational position of the rotating body; a reference position detecting unit that detects whether or not a rotational position of the rotating body is a predetermined reference position; a storage unit that stores preset correction information corresponding to the first pulse signal; and an output unit that outputs a periodic second pulse signal having a second resolution lower than the first resolution based on the first pulse signal output from the rotation detection unit, the detection result of the reference position detection unit, and the correction information stored in the storage unit.

Preferably, the output section generates the pulses of the second pulse signal based on a timing at which the pulse determined based on the correction information among the pulses of the first pulse signal is output.

Preferably, the correction information is set to correspond to each pulse included in the first pulse signal that is output while the rotating body rotates in the entire region of the rotatable range.

(effect of the invention)

According to the present invention, a high-precision position detection device having a simple configuration can be provided.

Drawings

Fig. 1 is a block diagram showing a configuration of a motor device using an encoder according to one embodiment of the present invention.

Fig. 2 is a block diagram showing a schematic configuration of an encoder.

Fig. 3 is a timing chart illustrating the operation of the encoder.

Fig. 4 is a timing chart illustrating an operation of the encoder according to the first modification of the present embodiment.

Fig. 5 is a timing chart illustrating an operation of an encoder according to a second modification of the present embodiment.

Detailed Description

Hereinafter, an encoder (an example of a position detection device) according to an embodiment of the present invention will be described.