CN110926516A - Detection device and method for detecting position of light source of encoder - Google Patents
Detection device and method for detecting position of light source of encoder Download PDFInfo
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- CN110926516A CN110926516A CN201911160209.3A CN201911160209A CN110926516A CN 110926516 A CN110926516 A CN 110926516A CN 201911160209 A CN201911160209 A CN 201911160209A CN 110926516 A CN110926516 A CN 110926516A
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- light source
- encoder
- infrared display
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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Abstract
The invention relates to the technical field of sensors, in particular to a detection device and a detection method for detecting the position of a light source of an encoder; the infrared display target comprises a bracket, a target board and an infrared display, wherein the bracket is in a convex shape and comprises an installation board and a fixed board; placing a light source to be detected on the shaft sleeve, and emitting a light beam by the light source to form an image on the infrared display through the target pattern; when the position of the light source at different positions of the encoder is detected, the infrared display is required to be arranged right above the target pattern, light emitted by the light source is imaged on the infrared display through the target pattern, and whether the position of the light source of the encoder is ideal or not is detected by observing the positions of light spots imaged on the infrared display and the target pattern.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a detection device and a detection method for detecting the position of a light source of an encoder.
Background
When the encoder works, the rotation of the rotating shaft drives the coded disc to rotate, moire fringes with alternate light and shade are generated by the relative motion of the coded disc and the slit, photoelectric signals with variable heights are generated on the photoelectric receiver after light beams pass through the coded disc and the slit, and the angle value of the encoder can be obtained by processing the electric signals.
In the prior art, as shown in fig. 2, light emitted from a light source at an ideal position passes through a code wheel and a slit, and then forms a circular light spot to irradiate a plurality of corresponding photoelectric receivers, wherein the center of the light spot is located at the center of the plurality of photoelectric receivers; however, in the welding and adjusting processes, the light source is easy to translate or tilt, so that light spots are offset, and a light fleeing phenomenon is caused, namely, some photoelectric receivers receive light emitted by other light sources; or the received light intensity of the corresponding photoelectric receivers is not uniform, so that it is important to ensure the position of the light source to be accurate.
Disclosure of Invention
The invention mainly solves the technical problem of providing a detection device and a method for detecting the position of a light source of an encoder, when the detection device detects the position of the light source at different parts of the encoder, an infrared display is required to be ensured to be right above a target pattern, light emitted by the light source is imaged on the infrared display through the target pattern, and whether the position of the light source of the encoder is ideal or not is detected by observing the positions of light spots imaged on the infrared display and the target pattern.
In order to solve the technical problems, the invention adopts a technical scheme that: the detection device for detecting the light source position of the encoder is used for detecting the light source position of the encoder and comprises a support, a target board and an infrared display, wherein the target board and the infrared display are connected to the support; and a light source emission beam of the encoder is imaged on the infrared display through the target pattern, and whether the position of the light source of the encoder is ideal or not is judged by observing the position of a light spot imaged on the infrared display.
As a refinement of the invention, the edges of the frame of the target pattern are provided as opaque regions, and both the inside and the outside of the frame of the target pattern are provided as transparent regions.
As a further improvement of the invention, the infrared display adopts a device capable of imaging and displaying infrared light.
A detection method for detecting the position of a light source of an encoder comprises the following steps:
step S1, connecting a shaft sleeve of an encoder to a mounting plate of a bracket, connecting a target plate to the upper end surface of the shaft sleeve, connecting an infrared display to a fixing plate of the bracket, and adjusting the infrared display to enable the infrared display to be aligned with a target pattern on the target plate;
step S2, placing a light source of the encoder to be detected on the shaft sleeve;
step S3, the bracket is placed in a darkroom environment;
step S4, the light source emits a light beam to image on the infrared display through the target pattern, and whether the position of the light source of the encoder is ideal is judged by observing the position of a light spot imaged on the infrared display;
and step S5, eliminating the light sources which do not meet the use requirement.
As a modification of the present invention, in step S1, the target pattern is made to be the same size as the photoelectric receiver in the related art.
As a further improvement of the present invention, in step S2, the distance between the target pattern and the light source is the same as the distance between the photoelectric receiver and the light source in the prior art.
As a further improvement of the present invention, in step S1, the infrared display is a CCD camera.
As a further improvement of the present invention, in step S1, the edges of the boxes of the target pattern are set as opaque regions, and both the inside and the outside of the boxes of the target pattern are set as transparent regions.
The invention has the beneficial effects that: when the position of the light source at different positions of the encoder is detected, the infrared display is required to be arranged right above the target pattern, light emitted by the light source is imaged on the infrared display through the target pattern, and whether the position of the light source of the encoder is ideal or not is detected by observing the positions of light spots imaged on the infrared display and the target pattern.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a prior art optoelectronic connector receiving a light source;
FIG. 3 is a schematic view of the construction of a target board within the present invention;
FIG. 4 is a schematic view of an imaging of an internal infrared display according to the present invention;
FIG. 5 is a block diagram of the method steps of the present invention;
reference numerals: the method comprises the following steps of 1-support, 11-mounting plate, 12-fixing plate, 2-target plate, 21-target pattern, 3-infrared display, 4-shaft sleeve, 5-light source, 6-processing circuit board, 7-photoelectric receiver, 8-slit, 9-code disc and 10-rotating shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 2, in the prior art, light emitted from a light source at an ideal position passes through a code wheel and a slit, and then forms a circular light spot to irradiate onto a plurality of corresponding photoelectric receivers, wherein the center of the light spot is located at the center of the plurality of photoelectric receivers; however, in the welding and adjusting processes, the light source is easy to translate or tilt, so that light spots are offset, and a light fleeing phenomenon is caused, namely, some photoelectric receivers receive light emitted by other light sources; or cause non-uniformity in received light intensity of the corresponding plurality of photoreceivers.
To solve the technical problem in fig. 2, as shown in fig. 1, 3 and 4, the present invention provides a detection device for detecting a light source position of an encoder, which is used for detecting the light source position of the encoder, and the encoder is provided with a shaft sleeve.
As shown in fig. 1, the detection device for detecting the position of the light source of the encoder of the present invention includes a bracket 1, and a target plate 2 and an infrared display 3 connected to the bracket 1, wherein the bracket 1 is in a "convex" shape, the middle of the bracket 1 is in a hollow structure, the bracket 1 includes an installation plate 11 disposed on the bottom surface of the bracket 1 and a fixing plate 12 disposed on the top surface of the bracket 1, a shaft sleeve 4 is connected to the installation plate 11, the target plate 2 is connected to the upper end surface of the shaft sleeve 4, a target pattern 21 is disposed on the target plate 2, the infrared display 3 is connected to the fixing plate 12, and the infrared display 3 is aligned to the target pattern 21; the light source 5 of the encoder is arranged in the shaft sleeve of the encoder, the light beam emitted by the light source 5 of the encoder is imaged on the infrared display 3 through the target pattern 21, and whether the position of the light source 5 of the encoder is ideal or not is judged by observing the position of a light spot imaged on the infrared display 3.
When the invention detects the light source positions of different parts of the encoder, the infrared display 3 is required to be ensured to be right above the target pattern 21, the light emitted by the light source 5 is imaged on the infrared display 3 through the target pattern 21, and whether the position of the encoder light source is ideal or not is detected by observing the light spot imaged on the infrared display 3 and the position of the target pattern 21.
Within the present invention, the edges of the frame of the target pattern 21 are set as opaque regions, and both the inside and the outside of the frame of the target pattern 21 are set as transparent regions.
In the present invention, the infrared display 3 is a device capable of displaying infrared light by imaging, such as a CCD camera or a mobile phone or an infrared display card.
As shown in fig. 1, fixing a light source 5 on a shaft sleeve 4 of an encoder, mounting a manufactured target plate 2 on the upper end surface of the shaft sleeve 4, wherein the position of the target plate 2 is the same as the position when a processing circuit board 6 is mounted in fig. 1, the distance between a target pattern 21 and the light source 5 is the same as the distance between an photoelectric receiver 7 and the light source 5 in fig. 1, the size and the position of the target pattern 21 on the target plate 2 are the same as those of the photoelectric receiver 7 in fig. 1, placing the shaft sleeve 4 on a mounting plate 11 at the lower part of a bracket 1, mounting an infrared display 5 (such as a CCD camera or a mobile phone, an infrared display card and the like) on a fixing plate 12 at the upper part of the bracket 1, and detecting the whole device in; light emitted by the light source 5 passes through the target 2 and is imaged on the infrared display 5.
As shown in fig. 3, the size and the position of the target pattern 21 on the target plate 2 are the same as those of the photoelectric receiver 7, and in order to facilitate observation of the distribution of the light spots in the target pattern 21, the edges of the square frame of the target pattern 21 are designed as opaque regions, and the inner and outer portions of the square frame of the target pattern 21 are designed as transparent regions.
Fig. 4 is an image of light emitted from a light source passing through a target pattern and being imaged on an infrared display 5 (such as a CCD camera, a mobile phone, an infrared display card, etc.), wherein a solid line is an example of a light spot position where light emitted from the light source at an ideal position is imaged on the infrared display 5 (such as a CCD camera, a mobile phone, an infrared display card, etc.), and a dotted line is an example of a light spot position where light emitted from the light source at a non-ideal position is imaged on the infrared display 5 (such as a CCD camera, a mobile phone, an infrared display card, etc.), and by identifying the position of the light spot, it can be detected whether the light source meets requirements, and the installation efficiency and the.
As shown in fig. 5, a method for detecting the position of a light source of an encoder includes the following steps:
step S1, connecting a shaft sleeve of an encoder to a mounting plate of a bracket, connecting a target plate to the upper end surface of the shaft sleeve, connecting an infrared display to a fixing plate of the bracket, and adjusting the infrared display to enable the infrared display to be aligned with a target pattern on the target plate;
step S2, placing a light source of the encoder to be detected on the shaft sleeve;
step S3, the bracket is placed in a darkroom environment;
step S4, the light source emits a light beam to image on the infrared display through the target pattern, and whether the position of the light source of the encoder is ideal is judged by observing the position of a light spot imaged on the infrared display;
and step S5, eliminating the light sources which do not meet the use requirement. In step S1, as shown in fig. 2, the target pattern 21 is made the same size as the photoelectric receiver 7 in the related art; in step S2, the distance between the target pattern 21 and the light source 5 is the same as the distance between the photoelectric receiver 7 and the light source 5 in the prior art.
In step S1, the infrared display 3 uses a CCD camera, the edge of the frame of the target pattern 21 is set as a non-light-transmitting region, and both the inside and the outside of the frame of the target pattern 21 are set as light-transmitting regions.
Within the present invention, the target plate 2 is simulated as the spatial position of the photoelectric receiver 7; and performing visible debugging on the infrared light source invisible to naked eyes by using a CCD camera, a mobile phone camera or an infrared display card.
The invention can accurately detect the position of the light source, eliminates the light source which does not meet the use requirement in advance before the whole encoder is installed and adjusted, avoids blind adjustment after the use, and reduces the workload brought by replacing the light source which does not meet the requirement in the installation and adjustment process of the encoder.
The detection device for detecting the position of the light source of the encoder consists of a target plate 2, a bracket 1 and an infrared display 3; the target pattern 21 on the target board 2 is used as a space position simulation of the photoelectric receiver 7, the position of the target pattern 21 on the target board 2 is the same as the position of the photoelectric receiver 7 on the processing circuit board 6 in fig. 2, and the size of the target pattern 21 is the same as that of the photoelectric receiver 7 in fig. 2; because the spectrum of the light source 5 is an invisible infrared band, the debugging of invisible light needs to be converted into visible debugging, and the infrared display 3 can be a CCD camera, a mobile phone or an infrared display card and the like; fixing a light source 5 in a shaft sleeve 4 of an encoder, fixing a target board 2 at the same position as a processing circuit board 6, wherein the distance between a target pattern 21 and the light source 5 is the same as the distance between a photoelectric receiver 6 and the light source 5 in the figure 2, fixing the shaft sleeve 4 on a mounting plate 11 at the lower part of a bracket 1, and fixing an infrared display 3 on a fixing plate 12 at the upper part of the bracket; when the light source positions of different parts of the encoder are detected, the infrared display is required to be ensured to be right above the target pattern, the light emitted by the light source 5 is imaged on the infrared display 3 through the target pattern 21, and whether the encoder light source position is ideal or not is detected by observing the positions of light spots imaged on the infrared display 3 and the target pattern 21.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A detection device for detecting the position of a light source of an encoder is used for detecting the position of the light source of the encoder and is characterized by comprising a support, a target board and an infrared display, wherein the target board and the infrared display are connected to the support; and a light source emission beam of the encoder is imaged on the infrared display through the target pattern, and whether the position of the light source of the encoder is ideal or not is judged by observing the position of a light spot imaged on the infrared display.
2. The detecting device for detecting the position of the light source of the encoder as claimed in claim 1, wherein the edge of the frame of the target pattern is set as a non-light-transmitting region, and both the inside and the outside of the frame of the target pattern are set as light-transmitting regions.
3. The apparatus as claimed in claim 1, wherein the infrared display is a device capable of displaying infrared light.
4. A detection method for detecting the position of a light source of an encoder is characterized by comprising the following steps:
step S1, connecting a shaft sleeve of an encoder to a mounting plate of a bracket, connecting a target plate to the upper end surface of the shaft sleeve, connecting an infrared display to a fixing plate of the bracket, and adjusting the infrared display to enable the infrared display to be aligned with a target pattern on the target plate;
step S2, placing a light source of the encoder to be detected on the shaft sleeve;
step S3, the bracket is placed in a darkroom environment;
step S4, the light source emits a light beam to image on the infrared display through the target pattern, and whether the position of the light source of the encoder is ideal is judged by observing the position of a light spot imaged on the infrared display;
and step S5, eliminating the light sources which do not meet the use requirement.
5. The method as claimed in claim 4, wherein in step S1, the target pattern is made to be the same size as the photoreceiver in the prior art.
6. The method as claimed in claim 5, wherein in step S2, the distance between the target pattern and the light source is the same as the distance between the photoelectric receiver and the light source in the prior art.
7. The method as claimed in claim 4, wherein in step S1, the infrared display is a CCD camera.
8. The method as claimed in claim 4, wherein in step S1, the edges of the frame of the target pattern are opaque regions, and the inner and outer portions of the frame of the target pattern are transparent regions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911160209.3A CN110926516A (en) | 2019-11-23 | 2019-11-23 | Detection device and method for detecting position of light source of encoder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911160209.3A CN110926516A (en) | 2019-11-23 | 2019-11-23 | Detection device and method for detecting position of light source of encoder |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57120815A (en) * | 1980-12-19 | 1982-07-28 | Ibm | Sequential rotary encoder |
| CN1940489A (en) * | 2005-09-30 | 2007-04-04 | 安华高科技Ecbuip(新加坡)私人有限公司 | Method and system of detecting eccentricity and up/down movement of a code wheel of an optical encoder set |
| CN103308093A (en) * | 2013-06-13 | 2013-09-18 | 哈尔滨理工大学 | Automatic adjusting set for encoder grating eccentricity |
| CN109682576A (en) * | 2017-10-19 | 2019-04-26 | 深圳光峰科技股份有限公司 | Light source hot spot detection method and detection device |
| CN110332955A (en) * | 2019-07-25 | 2019-10-15 | 长沙滕创信息技术有限公司 | A kind of photoelectric encoder calibration method |
-
2019
- 2019-11-23 CN CN201911160209.3A patent/CN110926516A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57120815A (en) * | 1980-12-19 | 1982-07-28 | Ibm | Sequential rotary encoder |
| CN1940489A (en) * | 2005-09-30 | 2007-04-04 | 安华高科技Ecbuip(新加坡)私人有限公司 | Method and system of detecting eccentricity and up/down movement of a code wheel of an optical encoder set |
| CN103308093A (en) * | 2013-06-13 | 2013-09-18 | 哈尔滨理工大学 | Automatic adjusting set for encoder grating eccentricity |
| CN109682576A (en) * | 2017-10-19 | 2019-04-26 | 深圳光峰科技股份有限公司 | Light source hot spot detection method and detection device |
| CN110332955A (en) * | 2019-07-25 | 2019-10-15 | 长沙滕创信息技术有限公司 | A kind of photoelectric encoder calibration method |
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Application publication date: 20200327 |