JPS62299719A - Magnetic encoder - Google Patents

Abstract

PURPOSE:To decrease the kinds of components of a device in number and to make production control advantageous by providing one magnetic sensor with plural sensor element groups which differ in array pitch according to resolution and providing connection terminals to the respective sensor element groups individually. CONSTITUTION:For example, when the magnetic sensor 1 provided with an element group of sensor elements 2 with array pitch P' and an element group with array pitch P is used in combination with a magnetic drum having magnetization pitch 4P', connecting terminals 3 of the element group with the array pitch P' are connected to a waveform shaping circuit 6 and when the sensor is used in combination with a magnetic drum with magnetization pitch 4P, connecting terminals of the element group with the array pitch P are used similarly. Consequently, the kinds of components are decreased in number at the time of the mass-production of an encoder with different resolution, thereby improving the production control.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to improvement of a magnetic sensor that is a component of a magnetic encoder.

[Conventional technology]

In a magnetic encoder, if the magnetization pitch of the magnetic drum is 4P, then the arrangement pitch of the sensor elements of the magnetic sensor is P. The value of P changes depending on the resolution value required of the encoder.

[Problem that the invention seeks to solve]

Conventionally, in manufacturing encoders, several types of magnetic sensors have been manufactured according to the number of types of one resolution depending on the required resolution. This increases the number of types of parts when mass-producing encoders, which is disadvantageous in terms of production management.

[Means for solving problems]

In this invention, - magnetic sensors are provided with a plurality of sensor element groups having different arrangement pitches according to resolution, and each sensor element group is provided with a separate connection terminal.

[Effect]

A magnetic sensor including an element group with a sensor element arrangement pitch of Pl and an element group with a sensor element arrangement pitch of Pz is 1.
When used in combination with a magnetic drum with a magnetization pitch of 4P1, connect the connection terminals of the element group with an arrangement pitch of 4Pz to a waveform shaping circuit, and when used in combination with a magnetic drum with a magnetization pitch of 4Px, the arrangement The connection terminals of the element group with pitch P2 can be used in the same way.

〔Example〕

FIG. 1 shows an example of a magnetic sensor embodying the present invention. In FIG. 1, 1 is a sensor, 2 is a sensor element, and 3 is a terminal of the sensor element. In this example, the array pitch is P
and 4 sensor elements with an arrangement pitch of P'.
The pieces are arranged in parallel on the same center line.

FIG. 2 shows the magnetized state of the magnetic drum having rotation @5 and the combined state of the magnetic sensor 1 and the waveform shaping circuit that face it.

FIG. 3 shows another embodiment of the magnetic sensor 1. In FIG. In this example, four sensor elements with an arrangement pitch of P are arranged in the lower row, and four sensor elements with an arrangement pitch of P' are arranged in the upper row. The position of the sensor 1 is fixed by making the magnetized surface of the magnetic drum corresponding to the magnetization pitch face the upper or lower row of sensors.

〔Effect of the invention〕

According to the present invention, since one type of magnetic sensor can be applied to many types of magnetic drums, the number of types of parts can be reduced in the production of magnetic encoders with different resolutions. Therefore, regarding the management of manufacturing and inventory 1 assembly in the case of mass production, installation Q.

This has a great effect in reducing work time.

[Brief explanation of drawings]

FIG. 1 is a front view of the magnetic sensor used in the magnetic encoder of the present invention, FIG. 2 is a perspective view showing the assembly of parts of the magnetic encoder of the present invention, and FIG. 3 is the magnetic sensor shown in FIG. 1. It is a front view showing a modification of.

Claims (1)

[Claims] 1. In a combination of a magnetic drum with a magnetization pitch of 4P, a magnetic sensor with an arrangement pitch P of magnetic sensor elements, and a waveform shaping circuit, the above-mentioned magnetic sensor is divided into a group of sensor elements with different values of the arrangement pitch P. What is claimed is: 1. A magnetic encoder comprising a plurality of sensor element groups, each having a separate terminal connected to each sensor element group for switching to a waveform shaping circuit.