CN212779087U

CN212779087U - Erasable magnetic grid ruler magnetic reading device with bidirectional zero position

Info

Publication number: CN212779087U
Application number: CN202021977616.1U
Authority: CN
Inventors: 李巍; 王钰莹
Original assignee: Shenzhen Innoway System Co ltd
Current assignee: Shenzhen Innoway System Co ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-03-23
Anticipated expiration: 2030-09-11

Abstract

The utility model discloses a magnetic grating ruler magnetic reading device with two-way zero position and erasable, including magnetic grating ruler body and magnetic reading head, the wainscot of this magnetic grating ruler body is magnetic conduction base member layer, and its magnetic face inlayer is equipped with the increment sign way, the increment sign way through fill N magnetic sheet, fill S magnetic sheet interval arrangement in magnetic conduction base member layer, at the magnetic face surface and relative to arbitrary one fill N magnetic sheet or arbitrary one fill S magnetic sheet position on cover have one deck zero position mark, this zero position mark erasable and it with the magnetic face forms the reflection of light colour difference that the contrast is higher; and one end of the read head facing the magnetic surface is provided with a magnetic sensing head for reading the incremental code channel and an optical sensing head for reading the zero mark. The utility model discloses be equipped with two-way zero-bit and erasable magnetic grid chi read magnetism device is on traditional incremental displacement sensor, especially magnetic grid incremental displacement sensor, on the basis that does not destroy original structure, the user can freely define the zero-bit of specific position.

Description

Erasable magnetic grid ruler magnetic reading device with bidirectional zero position

Technical Field

The utility model relates to a magnetic grid, it is specific relate to a magnetic grid chi reads magnetism device with two-way zero-bit and erasable.

Background

The magnetic scale records magnetic waves with strictly equal intervals on the magnetic scale (or disk) by a recording head in a similar way to the recording technique, and is called magnetic recording. The magnetic scale on which the magnetic wave has been recorded is called a magnetic grid scale. The separation distance between adjacent grid waves on the magnetic grid ruler is called the wavelength of the magnetic grid, and is also called the pitch (grid distance) of the magnetic grid. The magnetic grid ruler is a reference element of the magnetic grid digital display system. Obviously, the wavelength is the length measurement unit of the magnetic scale. Any measured length can be represented by the sum of the corresponding magnetic grid wavelengths. The body of the magnetic grid ruler can be made of hard magnetic alloy meeting certain requirements. Or the magnetic material with a layer of hard magnetic alloy plated on the surface.

As shown in fig. 1, the magnetic scale cooperates with a read head, and the magnetic scale and the read head operate according to the principle of magnetic induction. When the read head moves linearly in the magnetic field space of the magnetic grid ruler, the read head can output position pulses meeting the standard in real time according to the relevant movement displacement of the movement.

The traditional incremental displacement sensor cannot memorize the current position after the system is in a voltage-off state, so a reference zero position must be set, the reference zero position is powered on and returns to zero, if the zero position is fixed, the reference zero position is used invariably, the zero position required in many occasions is determined by the actual field requirements of customers, and if the incremental displacement sensor is directly powered off, the incremental displacement sensor has huge use limitation.

SUMMERY OF THE UTILITY MODEL

To the not enough among the prior art, the to-be-solved technical problem of the utility model lies in providing a magnetic device is read to magnetic grid chi with two-way zero-bit and erasable, and the purpose of designing this magnetic grid structure is for quick, accurate definite zero-bit.

In order to solve the technical problem, the utility model discloses a following scheme realizes: the utility model discloses a magnetic grid chi reads magnetism device with two-way zero-bit and erasable, including magnetic grid chi body and read magnetic head, the wainscot of this magnetic grid chi body is magnetic conduction base member layer, and its magnetic surface inlayer is equipped with the increment sign way, the increment sign way through fill N magnetic sheet, fill S magnetic sheet interval arrangement in magnetic conduction base member layer, at the magnetic surface and relative to arbitrary one fill N magnetic sheet or arbitrary one fill S magnetic sheet position on cover have one deck zero-bit mark, this zero-bit mark erasable and its with the magnetic surface forms the reflection of light colour difference that the contrast is higher;

and one end of the read head facing the magnetic surface is provided with a magnetic sensing head for reading the incremental code channel and an optical sensing head for reading the zero mark.

Further, any N-charging magnetic sheet or any S-charging magnetic sheet is fully covered by the zero mark.

Further, the zero mark and the magnetic surface form a reflective color difference which is enough to be read by the optical sensor head.

Furthermore, the outer surface of the magnetic surface is a light reflecting surface.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses be equipped with two-way zero-bit and erasable magnetic grid chi read magnetism device is on traditional incremental displacement sensor, especially magnetic grid incremental displacement sensor, on the basis that does not destroy original structure, the user can freely define the zero-bit of specific position.

Drawings

Fig. 1 is a schematic structural diagram of a magnetic scale reading device in the prior art.

Fig. 2 is a schematic structural view of the magnetic scale reading device of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making more clear and definite definitions of the protection scope of the present invention. It is obvious that the described embodiments of the invention are only some of the embodiments of the invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1: the utility model discloses a concrete structure as follows:

referring to fig. 2, the magnetic scale reading device with bidirectional zero position and erasable of the present invention comprises a magnetic scale body and a reading head 3, wherein the facing of the magnetic scale body is a magnetic conductive substrate layer 1, an increment code track is arranged on the inner layer of a magnetic surface 2 of the magnetic scale body, the increment code track is arranged on the magnetic conductive substrate layer 1 through N-charging magnetic sheets and S-charging magnetic sheets at intervals, a zero position mark 4 is covered on the outer surface of the magnetic surface and at a position opposite to any N-charging magnetic sheet or any S-charging magnetic sheet, the zero position mark 4 is erasable and forms a reflection color difference with a higher contrast with the magnetic surface 2;

the read head 3 has a magnetic sensor head 31 for reading the incremental track and an optical sensor head 32 for reading the null mark 4 at its end facing the magnetic surface 2.

A preferred technical solution of this embodiment: and the zero position mark 4 is used for fully covering any one N-charging magnetic sheet or any one S-charging magnetic sheet.

A preferred technical solution of this embodiment: the null mark 4, which is a difference in reflection of light with the magnetic surface 2, is sufficient for the optical sensor head 32 to read.

A preferred technical solution of this embodiment: the outer surface of the magnetic surface 2 is a light reflecting surface.

Example 2:

in the linear mechanism, in order to enable the movable part to accurately move and position, a magnetic grid ruler magnetic reading device is arranged on the linear mechanism, the magnetic grid ruler is attached to one side of the guide rail, and the magnetic reading head is arranged on the movable part on the guide rail or directly arranged on the sliding block. The magnetic sensing head 31 on the read head 3 and facing the magnetic scale moves with the movable part or slider.

In order to solve the problems in the background art, it is necessary to improve the read head 3 as in embodiment 1, and add an optical sensor 32 to the conventional read head 3, where the optical sensor 32 is used to read the zero mark 4, and the zero position can be quickly determined after the linear mechanism is powered on, so that the movable portion can be accurately moved. Such as the print section on a printer, which also requires reading the null marks to determine the print position.

Example 3:

the color of the reflective surface of the magnetic surface 2 on the magnetic scale must form a high reflective color difference with the zero mark 4 so that the optical sensor head 32 can accurately read.

If an operator coats any one of the N-charging magnetic sheets or any one of the S-charging magnetic sheets through a highlighter or white ink with higher light reflection rate and the like and coats the N-charging magnetic sheets or the S-charging magnetic sheets in a full-coverage mode, the highlighter and the white ink can be erased through alcohol, and therefore the zero mark 4 can be replaced according to actual requirements.

Example 4:

the magnetic surface 2 is generally a gray scale reflective surface, and the null marks 4 are preferably white ink.

To sum up, the utility model discloses be equipped with two-way zero-bit and erasable magnetic grid chi and read magnetism device is on traditional incremental displacement sensor, especially magnetic grid incremental displacement sensor, on the basis that does not destroy original structure, the zero-bit of specific position can freely be defined to the user. The utility model discloses combine the grating chi with the magnetic grid chi and form a novel magnetic grid chi and read magnetism device, its zero-bit location is quick, accurate.

Example 5:

since the null flag 4 can be set by demand, the null flag 4 can be set to a bidirectional null for use with more linear mechanisms.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. A magnetic grating ruler magnetic reading device with bidirectional zero position and erasable performance comprises a magnetic grating ruler body and a magnetic reading head (3), wherein the surface of the magnetic grating ruler body is faced with a magnetic conduction base body layer (1), the inner layer of a magnetic surface (2) of the magnetic grating ruler body is provided with an increment code channel, and the increment code channel is arranged on the magnetic conduction base body layer (1) through N-charging magnetic sheets and S-charging magnetic sheets at intervals, and the magnetic grating ruler magnetic reading device is characterized in that a zero position mark (4) is covered on the outer surface of the magnetic surface and at a position corresponding to any one of the N-charging magnetic sheets or any one of the S-charging magnetic sheets, and the zero position mark (4) is erasable and forms reflection color difference with higher contrast with the magnetic surface (;

and one end of the read head (3) facing the magnetic surface (2) is provided with a magnetic sensing head (31) for reading the incremental code track and an optical sensing head (32) for reading the zero mark (4).

2. A rewritable magnetic scale reading device with a bidirectional null according to claim 1, characterized in that the null indicator (4) covers all of either N-charged or S-charged disks.

3. A magnetic scale reading device with bidirectional null and erasable as claimed in claim 1, characterized in that the difference in reflection colour between the null mark (4) and the magnetic surface (2) is sufficient for the optical head (32) to read.

4. A rewritable magnetic scale reading device with bidirectional null according to claim 1, characterized in that the outer surface of the magnetic surface (2) is a reflective surface.