CN220960119U

CN220960119U - Appointed activation assembly for linear grating encoder

Info

Publication number: CN220960119U
Application number: CN202322593554.4U
Authority: CN
Inventors: 于洋; 范守苏
Original assignee: Shanghai Patney Intelligent Technology Co ltd
Current assignee: Shanghai Patney Intelligent Technology Co ltd
Priority date: 2023-09-22
Filing date: 2023-09-22
Publication date: 2024-05-14
Anticipated expiration: 2033-09-22

Abstract

The utility model discloses a designated activating component for a linear grating encoder, which comprises a grating ruler, wherein the surface of the grating ruler is connected with the grating encoder in a sliding way, a plurality of index scales are fixedly connected on the surface of the grating ruler at equal intervals, an activating sticker is stuck on the index scales, the grating encoder comprises a shell, and a photoelectric sensor and a grating sensor are embedded in the shell, and the utility model has the beneficial effects that: by sticking the activated sticker at a designated position near the index scale which needs to trigger the output origin Zpulse signal, the size of the activated sticker just shields the light emitting window and the light receiving window of the photoelectric sensor, and the black surface is used for absorbing the light signal emitted by the photoelectric sensor, so that the light signal cannot be reflected back to the receiving end of the photoelectric sensor, the designated index scale is marked by activating the sticker, a special analysis component is not needed, and the cost of the encoder is greatly reduced.

Description

Appointed activation assembly for linear grating encoder

Technical Field

The utility model relates to the technical field of grating scales, in particular to a designated activating component for a linear grating encoder.

Background

Grating scales, also known as grating scale displacement sensors, are measurement feedback devices that work on the optical principle of gratings. The grating ruler is often applied to a closed-loop servo system of a numerical control machine tool and can be used for detecting linear displacement or angular displacement.

Compared with the rotary grating ruler, each circle of the rotary grating ruler only has 1 index scale for outputting an original point signal Zpulse, the linear grating ruler is influenced by a production process, 1 index scale is arranged at each interval of one section of position, when the linear encoder is applied to position feedback of the linear motor, only one index scale is usually fixed from zero to two sides of the motor, the index scales of other stroke sections need to be ignored, in the prior art, an analysis component is arranged in the encoder, so that the encoder is internally provided with a designated index scale activation function, whether the original point Zpulse signal is output or not is judged according to the requirement of external light or a magnetic sensor input trigger signal, and the cost of the encoder is greatly increased due to the mode.

Disclosure of utility model

The present utility model is directed to a specific activation component for a linear grating encoder to solve the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the appointed activation component for the linear grating encoder comprises a grating ruler, wherein the grating encoder is connected onto the surface of the grating ruler in a sliding mode, a plurality of index scales are fixedly connected onto the surface of the grating ruler at equal intervals, and activation stickers are adhered onto the index scales.

Preferably, the grating encoder comprises a casing, and a photoelectric sensor and a grating sensor are embedded in the casing.

Preferably, the activated decal corresponds to a photosensor, and the activated decal has the same size as the photosensor.

Preferably, the distance between the active sticker and the index scale center is the same as the distance between the photoelectric sensor and the grating sensor center.

Compared with the prior art, the utility model has the beneficial effects that: by sticking the activated sticker at a designated position near the index scale which needs to trigger the output origin Zpulse signal, the size of the activated sticker just shields the light emitting window and the light receiving window of the photoelectric sensor, and the black surface is used for absorbing the light signal emitted by the photoelectric sensor, so that the light signal cannot be reflected back to the receiving end of the photoelectric sensor, the designated index scale is marked by activating the sticker, a special analysis component is not needed, and the cost of the encoder is greatly reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of a grating encoder according to the present utility model;

FIG. 3 is a schematic block diagram of the circuit of the present utility model;

Fig. 4 is a schematic circuit diagram of the present utility model.

In the figure: 1. a grating ruler; 2. a grating encoder; 21. a housing; 22. a photoelectric sensor; 23. a grating sensor; 3. index scale; 4. the decal is activated.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides a appointed activation subassembly for linear type grating encoder, including grating chi 1, sliding connection has grating encoder 2 on the surface of grating chi 1, equidistant fixedly connected with a plurality of index graduations 3 on the surface of grating chi 1, paste on the index graduation 3 and have activation sticker 4, the activation sticker is the black tape gum sticker that length and width is 3mmx4mm, the size just enough blocks the luminous and the receipts light window of photoelectric sensor PC1, the surface black is used for absorbing the optical signal that photoelectric sensor PC1 sent, make it unable reflection return to the triggering sampling unit of photoelectric sensor PC1, play the marking effect that the appointed index graduation position.

The grating encoder 2 comprises a shell 21, a photoelectric sensor 22 and a grating sensor 23 are embedded in the shell 21, the photoelectric sensor 22 is matched with the design of a black light absorption sticker sampling activation triggering position in a triggering sampling unit, and a circuit design for comparing and judging an output signal of the photoelectric sensor 22 with a reference signal is adopted in a comparing and judging unit.

The activation sticker 4 corresponds to the photosensor 22, and the activation sticker 4 is the same size as the photosensor 22.

The distance between the active decal 4 and the center of the index scale 3 is the same as the distance between the photosensor 22 and the center of the grating sensor 23.

Specifically, when the encoder moves near index scale 3 with activated sticker 4, photoelectric sensor 22 emits light source to irradiate black activated sticker 4, no or only very weak reflected light signal is received by receiving end of photoelectric sensor 22, current signal is generated and loaded on resistor R6 to be converted into analog voltage signal TRIG representing reflected light intensity, voltage of the signal is compared with voltage division signal VREF of resistor R1 and R3 through hysteresis comparator circuit, TRIG voltage is lower than VREF voltage, output signal ENABLE of comparator outputs 5V high level, trigger activation is effective at this time, when grating encoder 2 continues to move near index scale 3 with activated sticker 4, grating sensor 23 outputs indexZ high level pulse of signal, and output end PIN4 outputs Zpulse signal when input end of AND gate U2 is all high level, since the pulse width of the TRIG signal generated by the activated adhesive tape is proportional to the width of the activated sticker 4, the pulse width is far higher than that of indexZ, so that the phase of the Zpulse signal output by the and gate U2 is identical to that of indexZ, so that Zpulse signal replaces indexZ signal to be used as the output signal of index scale 3, the precision of the grating encoder 2 cannot be affected, when the grating encoder 2 moves near the index scale 3 of the inactivated sticker 4, the photoelectric sensor 22 emits light to irradiate the blank of the grating scale 1, the light signal reflected by the grating scale 1 made of stainless steel is received by the receiving end of the photoelectric sensor 22, the generated current signal is loaded on the resistor R6 to be converted into an analog voltage signal TRIG representing the intensity of reflected light, the voltage of the TRIG signal is far higher than that of VREF, the output signal ENABLE of the comparator outputs 0V low level, at the moment, the activation failure is triggered when the grating encoder 2 passes near the index scale 3 of the inactivated sticker 4, the output signal Zpulse of the and gate U2 still keeps a low level state, and an output signal representing the index scale 3 is not generated, so that the circuit designed in this example achieves the function that the index scale 3 of the activated sticker 4 outputs a high-precision Zpulse signal, and the index scale 3 of the deactivated sticker 4 does not output a Zpulse signal.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A specific activation assembly for a linear grating encoder, comprising a grating scale (1), characterized in that: the surface of the grating ruler (1) is slidably connected with a grating encoder (2), a plurality of index scales (3) are fixedly connected with the surface of the grating ruler (1) at equal intervals, and an activation sticker (4) is adhered to the index scales (3).

2. A designated activation component for a linear grating encoder as defined in claim 1, wherein: the grating encoder (2) comprises a shell (21), and a photoelectric sensor (22) and a grating sensor (23) are embedded in the shell (21).

3. A designated activation component for a linear grating encoder as defined in claim 1, wherein: the activated sticker (4) corresponds to the photoelectric sensor (22), and the activated sticker (4) has the same size as the photoelectric sensor (22).

4. A designated activation component for a linear grating encoder as defined in claim 1, wherein: the distance between the active sticker (4) and the center of the index scale (3) and the distance between the photoelectric sensor (22) and the center of the grating sensor (23) are the same.