CN209992001U

CN209992001U - Polarization angle encoder

Info

Publication number: CN209992001U
Application number: CN201921226262.4U
Authority: CN
Inventors: 高飞; 景国丰; 吉玉成; 刘晓乐; 潘光鑫; 段程程
Original assignee: YANTAI UNIVERSAL MACHINE TOOL EQUIPMENT Co Ltd; Yantai Global Cnc Technology Co Ltd
Current assignee: YANTAI UNIVERSAL MACHINE TOOL EQUIPMENT Co Ltd; Yantai Global Cnc Technology Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-01-24
Anticipated expiration: 2029-07-31

Abstract

The utility model discloses a polarization angle encoder, including the installation shell, the pivot is installed in the rotation on the installation shell, one side of pivot is equipped with the motor, the output fixed mounting of motor has the drive shaft, and the pivot can be dismantled and connect in the drive shaft, fixed mounting has polarizing glass dish on the lateral wall that drive shaft one end was kept away from in the pivot, fixed mounting has first polaroid and second polaroid on polarizing glass dish's the roof, and first polaroid and second polaroid all incline the setting, the point of reference groove has been carved on polarizing glass dish is close to the roof of first polaroid and second polaroid one side. The utility model discloses in compare with current grating encoder, the polarization angle encoder need not carve a large amount of grooves and only need the reference point groove one of carving, very big reduction the processing degree of difficulty, polarization glass dish is lower than traditional grating groove glass dish cost moreover to very big reduction manufacturing cost, economic suitability is good.

Description

Polarization angle encoder

Technical Field

The utility model relates to an angle encoder technical field especially relates to a polarization angle encoder.

Background

The angle encoder is used in a large amount in various servo motors in the industry nowadays, the existing angle encoder is generally a grating encoder and a magnetic encoder, the magnetic encoder is low in precision and cannot meet the precision requirements of the servo motors and other high-precision occasions on the encoder, so the encoder used in the existing servo motor encoder and other high-precision occasions generally uses the grating encoder, and the grating encoder needs to be improved due to the fact that the grating encoder needs precise grating lines and is high in manufacturing difficulty and cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems of the grating encoder in the prior art that the manufacturing difficulty and the cost are higher, and providing a polarization angle encoder.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a polarization angle encoder comprises an installation shell, a rotating shaft is rotatably installed on the installation shell, a motor is arranged on one side of the rotating shaft, a driving shaft is fixedly installed at the output end of the motor, the rotating shaft is detachably connected to the driving shaft, a polarization glass disc is fixedly installed on the outer side wall far away from one end of the driving shaft in the rotating shaft, a first polarization film and a second polarization film are fixedly installed on the top wall of the polarization glass disc and obliquely arranged, a reference point groove is carved on the top wall close to one side of the first polarization film and one side of the second polarization film, a first photosensitive element, a second photosensitive element and a third photosensitive element are fixedly installed at the top end of the polarization glass disc, and the first photosensitive element, the second photosensitive element and the third photosensitive element respectively correspond to the first polarization film, the second polarization film and the reference point groove, the electronic circuit is connected to the first photosensitive element, the second photosensitive element and the third photosensitive element together, a first light-emitting diode, a second light-emitting diode and a third light-emitting diode are fixedly mounted at the bottom end of the polarized glass disc, the first light-emitting diode, the second light-emitting diode and the third light-emitting diode correspond to the reference point scribed line, the second polaroid and the first polaroid respectively, a third beam expanding collimating lens, a second beam expanding collimating lens and a first beam expanding collimating lens are fixedly mounted at the top ends of the first light-emitting diode, the second light-emitting diode and the third light-emitting diode respectively, and the third beam expanding collimating lens, the second beam expanding collimating lens and the first beam expanding collimating lens are all located below the polarized glass disc.

Preferably, a bearing is fixedly mounted on the outer side wall of one end of the rotating shaft close to the driving shaft.

Preferably, the first polarizer and the second polarizer are both obliquely arranged, and the difference between the oblique angles of the first polarizer and the second polarizer is.

Compared with the prior art, the utility model discloses there is following beneficial effect: compared with the existing grating encoder, the polarization angle encoder does not need to carve a large number of lines but only needs to carve one reference point line, so that the processing difficulty is greatly reduced, and the polarization glass disc is lower in cost than the traditional grating line glass disc, so that the manufacturing cost is greatly reduced, and the economic applicability is good.

Drawings

Fig. 1 is a schematic front structural diagram of a polarization angle encoder according to the present invention.

In the figure: the device comprises a first photosensitive element 1, a second photosensitive element 2, a third photosensitive element 3, a first polarizing film 4, a second polarizing film 5, a reference point reticle 6, a polarizing glass disc 7, a first beam expanding and collimating lens 8, a second beam expanding and collimating lens 9, a third beam expanding and collimating lens 10, a first light emitting diode 11, a second light emitting diode 12, a third light emitting diode 13, a bearing 14 and a rotating shaft 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1, a polarization angle encoder, including the installation shell, rotate on the installation shell and install pivot 15, one side of pivot 15 is equipped with the motor, and the output fixed mounting of motor has the drive shaft, and pivot 15 can dismantle the connection in the drive shaft, and fixed mounting has bearing 14 on the pivot 15 is close to the lateral wall of drive shaft one end, and the pivot 15 free rotation of not only being convenient for can also alleviate the axial load of pivot 15.

A polarizing glass disc 7 is fixedly installed on the outer side wall of one end, far away from the driving shaft, of the rotating shaft 15, a first polarizing film 4 and a second polarizing film 5 are fixedly installed on the top wall of the polarizing glass disc 7, the first polarizing film 4 and the second polarizing film 5 are both obliquely arranged, the difference value of the inclination angles of the first polarizing film 4 and the second polarizing film 5 is 45 degrees, a reference point line 6 is carved on the top wall of one side, close to the first polarizing film 4 and the second polarizing film 5, of the polarizing glass disc 7, a first photosensitive element 1, a second photosensitive element 2 and a third photosensitive element 3 are fixedly installed at the top end of the polarizing glass disc 7, the first photosensitive element 1, the second photosensitive element 2 and the third photosensitive element 3 respectively correspond to the first polarizing film 4, the second polarizing film 5 and the reference point line 6, and an electronic circuit is jointly connected on the first photosensitive element 1, the second photosensitive element 2 and the third photosensitive element 3, the bottom end of the polarization glass disc 7 is fixedly provided with a first light emitting diode 11, a second light emitting diode 12 and a third light emitting diode 13, the first light emitting diode 11, the second light emitting diode 12 and the third light emitting diode 13 respectively correspond to the reference point reticle 6, the second polaroid 5 and the first polaroid 4, the top ends of the first light emitting diode 11, the second light emitting diode 12 and the third light emitting diode 13 are respectively fixedly provided with a third beam expanding collimator lens 10, a second beam expanding collimator lens 9 and a first beam expanding collimator lens 8, and the third beam expanding collimator lens 10, the second beam expanding collimator lens 9 and the first beam expanding collimator lens 8 are all positioned below the polarization glass disc 7.

In the utility model, the installation shell is connected with the motor shell when in use, the rotating shaft 15 is connected with the driving shaft, the rotating shaft 15 and the polarized glass disk 7 arranged on the rotating shaft 15 rotate along with the rotation when the motor rotates, the light emitted by the first light emitting diode 11, the second light emitting diode 12 and the third light emitting diode 13 becomes parallel light after passing through the third beam expanding collimating lens 10, the second beam expanding collimating lens 9 and the first beam expanding collimating lens 8, wherein the two paths of light become two paths of polarized light after passing through the polarized glass disk 7, the two paths of polarized light irradiate the first photosensitive element 1 and the second photosensitive element 2 after passing through the first polarizing film 4 and the second polarizing film 5, thereby the photosensitive elements generate corresponding voltage, along with the rotation of the polarized glass disk 7, the polarization direction of the two paths of polarized light passing through the polarized glass disk 7 changes, after further polarization through the first polarizing film 4 and the second polarizing film 5, the irradiation intensity of light is changed accordingly, and finally the output voltages of the first photosensitive element 1 and the second photosensitive element 2 are sine waves with periodic change (the voltage of each half turn of the rotating shaft 15 is a sine wave with a period), because the polarization angle difference of the first polarizing film 4 and the second polarizing film 5 is 45 degrees, the output voltages of the first photosensitive element 1 and the second photosensitive element 2 are actually two sine waves with 45-degree phase difference, the two voltage signals can be calculated by an electronic circuit to obtain a space angle and output to an upper computer, the light beam emitted by the first light emitting diode 11 is collimated by the third beam expanding collimator lens 10 and then irradiates the polarizing glass disc 7, and a zero pulse signal is generated on the third photosensitive element 3 when the reference point reticle 6 passes through the polarizing glass disc to determine a zero position.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a polarization angle encoder, includes the installation shell, install pivot (15), its characterized in that are installed in the rotation on the installation shell: one side of pivot (15) is equipped with the motor, the output fixed mounting of motor has the drive shaft, and pivot (15) can dismantle the connection in the drive shaft, fixed mounting has polarizing glass dish (7) on the lateral wall of drive shaft one end is kept away from in pivot (15), fixed mounting has first polaroid (4) and second polaroid (5) on the roof of polarizing glass dish (7), and first polaroid (4) and second polaroid (5) all incline the setting, point of reference scale groove (6) have been drawn on the roof that polarizing glass dish (7) are close to first polaroid (4) and second polaroid (5) one side, the top fixed mounting of polarizing glass dish (7) has first light sensitive element (1), second light sensitive element (2) and third light sensitive element (3), and first light sensitive element (1), second light sensitive element (2) and third light sensitive element (3) respectively with first polaroid (4), The second polaroid (5) corresponds to the reference point scribing line (6), an electronic circuit is connected to the first photosensitive element (1), the second photosensitive element (2) and the third photosensitive element (3) together, a first light-emitting diode (11), a second light-emitting diode (12) and a third light-emitting diode (13) are fixedly mounted at the bottom end of the polarizing glass disc (7), the first light-emitting diode (11), the second light-emitting diode (12) and the third light-emitting diode (13) correspond to the reference point scribing line (6), the second polaroid (5) and the first polaroid (4) respectively, a third beam expanding collimating mirror (10), a second beam expanding collimating mirror (9) and a first beam expanding collimating mirror (8) are fixedly mounted at the top ends of the first light-emitting diode (11), the second light-emitting diode (12) and the third light-emitting diode (13) respectively, and the third beam expanding collimating mirror (10), The second beam expanding and collimating lens (9) and the first beam expanding and collimating lens (8) are both positioned below the polarizing glass disc (7).

2. A polarization angle encoder according to claim 1, wherein: and a bearing (14) is fixedly arranged on the outer side wall of one end, close to the driving shaft, of the rotating shaft (15).

3. A polarization angle encoder according to claim 1, wherein: the first polaroid (4) and the second polaroid (5) are obliquely arranged, and the difference of the inclination angles of the first polaroid (4) and the second polaroid (5) is 45 degrees.