CN2703254Y - Laser beam grid photoelectric sensor - Google Patents
Laser beam grid photoelectric sensor Download PDFInfo
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- CN2703254Y CN2703254Y CN 200420064665 CN200420064665U CN2703254Y CN 2703254 Y CN2703254 Y CN 2703254Y CN 200420064665 CN200420064665 CN 200420064665 CN 200420064665 U CN200420064665 U CN 200420064665U CN 2703254 Y CN2703254 Y CN 2703254Y
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- photoelectric sensor
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Abstract
The utility model discloses a laser beam grid photoelectric sensor which comprises laser diodes used as a light source, transmission type detecting units each of which is composed of a laser diode and a light activated element and a light shielding hole plate arranged in front of the light activated element, wherein the detecting units are divided into two groups of queues and are vertically and crosswise arranged in the same plane so as to cause queue laser beams to form a grid. The utility model is characterized in that light of the adjacent detecting units has no influence on each other; the output signal state of each detecting unit only depends on whether a light path in the detecting unit is blocked by detected objects or not; the distance of the laser diode and the light activated element in each detecting unit can be a plurality of centimeters to tens of meters according to the size of the detection range; the number of each row and each line of detecting units is not limited and can be determined according to the need of the detection range; the arrangement interval of the detecting units is not limited and can be determined according to the size of the detected objects. Compared with the existing sensor, the laser beam grid photoelectric sensor of the utility model can detect the position that the objects pass through the detecting section and recognize the condition that a plurality of objects simultaneously pass through.
Description
Affiliated technical field
The utility model is a kind of photoelectric sensor, particularly detects the photoelectric sensor of particle object.
Background technology
Whether in produce measuring control, often using detection has object to pass through the sensor in certain cross section, detects such as the seeding of seeder in the agricultural production.Inspected object is by the polytypes such as sensor condenser type, piezoelectric type and photo-electric commonly used in certain cross section, its version all is to arrange one group of sensitive element in detection sectional plane, have object by with no object by the time sensitive element circuit parameter change, obtain detection information through amplifying shaping.Inspected object has two by the difficult point in certain cross section: one is how to guarantee that object passes through all reliable detection from the optional position, cross section, just eliminate and detect the blind area; The 2nd, how recognition object is by the particular location of detection sectional plane and the situation that has a plurality of objects to pass through simultaneously.Chinese patent ZL 01220058.1 has proposed laser beam grid photoelectric sensor, has solved the detection blind zone problem of photoelectric sensor.But present sensor all can not recognition object by the particular location of detection sectional plane and a plurality of object the situation by detection sectional plane simultaneously.
Summary of the invention
The purpose of this utility model provides a kind of sensor, does not detect under the prerequisite of blind area guaranteeing, can detect situation that many objects pass through and the object position by detection sectional plane.
The technical scheme that the utility model adopted comprises three contents: the firstth, and be light source with the laser diode of many band lens, each laser tube cooperates a light activated element to constitute a transmission-type detecting unit.Because well the converging property of laser beam, the distance of light source and light activated element can be provided with arbitrarily according to the size of detection sectional plane, and is little of several centimetres, but arrives several meters, tens meters equal operate as normal greatly.The secondth, a plurality of detecting units are divided into two groups of square crossings of ranks are arranged in same plane, the number of ranks detecting unit is by the size decision of detection sectional plane, and laser beam constitutes a grid that covers certain limit on same plane.Pass through as object,, make corresponding ranks light activated element produce signal respectively as long as dimension of object, will be blocked each light of ranks at least simultaneously greater than beam separation.According to the scanning detection method of computer keyboard matrix, detect the state of all light activated elements of ranks, can draw the ranks position that object passes through.If there are many objects to pass through simultaneously, can identify from different ranks values.The 3rd is in light activated element photosensitive head front the shading orifice plate to be set.The converging property of laser diode light is fine, shines tens meters and can guarantee that also beam diameter is about 2～3mm.With laser tube is that the detecting unit that light source constitutes can realize only detecting a line, and live width equals the diameter of laser beam, and the light of adjacent cells arranged side by side can not influence each other, and this is the led light source effect that is beyond one's reach.Increase the shading orifice plate and can avoid influencing each other of adjacent cells light more up hill and dale.Shading orifice plate thickness 6～10mm, the position drill diameter 3mm light hole of corresponding each light activated element, the photosensitive head of each light activated element is aimed at the light hole of oneself.The detection sectional plane of sensor is more little, beam separation is more little, and the necessity of shadow shield is just big more.
The beneficial effects of the utility model: be used to detect diameter greater than the particle object of 3mm situation by detection sectional plane, do not exist and detect the blind area, detection sectional plane size and tested object change in size scope are big, the signal that not only can whether be had object to pass through particularly, and can obtain the signal that position that recognition object passes through and a plurality of object pass through simultaneously.
Description of drawings
Fig. 1 is a kind of embodiment of the present utility model.[P] is the substrate of carrying sensor components and parts, and [W] is the rectangle detection window that the central authorities at [P] open, the sense channel that just tested object passes through.[A] is laser diode, [A '] be the light activated element corresponding with [A], [A-A '] constituted a detecting unit, the similar detection unit also has [B-B '], [C-C '], [D-D '], [E-E '], [F-F '], [1-1 '], [2-2 '], [3-3 '], [4-4 '], [5-5 '], [6-6 '] totally 12, be divided into 6 row, 6 row around detection window, article 6, horizontal dotted line is represented the row of laser beam, article 6, vertical dotted line is represented the row of laser beam, the ranks laser beam constitutes the grid that covers whole detection window on same plane, size will be blocked the ranks laser beam greater than the object of laser beam spacing simultaneously by grid, reflects at the output terminal of corresponding sensitive element.[M1] is the shadow shield of row light activated element, and [M2] is the shadow shield of row light activated element, and [N] is the light hole of light activated element [A '], and other light activated element all has light hole separately.Output line H1～the H6 of 6 capable light activated elements and 6 row light activated element output line L1～L6 connect detecting instrument (not drawing among the figure) respectively, go out the ranks that light is blocked by the program interpretation, thereby determine the position that object passes through.
Embodiment
Fig. 1 embodiment is the laser beam grid sensor that is used to detect maize precise sowing machine seeding situation.The minimum diameter of laser tube product is 5mm at present, and the seeding channel diameter of corn Precision Seeding machine is generally about 30mm.Ranks are closely arranged by 6 laser tubes respectively in this example, and then the laser beam spacing is 5mm, and grid covers the rectangular extent of 35mm*35mm.Lasing beam diameter is 2mm, and analysis and experiment show, as long as minimum value can both reliable detection greater than 3mm in the corn seed three-dimensional dimension.Fig. 2 is several possibility situations of corn seed by detection sectional plane: seed [S1] blocking-up 1 row 1 row light can reflect at L1 and H1 end; Seed [S2] blocking-up 2 row 2 row light can reflect at L4, L5 and H2, H3 end; Seed [S3] blocking-up 2 row 1 row light can reflect at L5 and H4, H5 end; Seed [S4] blocking-up 1 row 2 row light can reflect at L1, L4 and H1 end.
Fig. 3 embodiment is the laser beam grid sensor that 7 row, 7 row detecting units constitute, laser tube is staggered, and can obtain littler laser beam spacing, be used to detect than corn particle little as particles such as soybean, also can be used for detecting larger particles such as corn, this moment is more favourable for improving bearing accuracy.
Fig. 4 is the embodiment that is used to detect one 8 row, 6 row in a big way.This moment, whole sensor was unnecessary to be produced on the PCB, but determine laser beam spacing and the required detecting unit number of ranks according to sensing range and tested dimension of object, make the light source board [X1] of row, the light source board [Y1] of row, the sensitive element plate [X2] of row and the sensitive element plate [Y2] of row respectively.Dotted line is represented sensing range among Fig. 4.If beam separation is bigger, shadow shield shown in Figure 1 can omit.
Claims (4)
1. laser beam grid photoelectric sensor, it is characterized in that: be light source with the laser diode, a laser diode and a light activated element constitute a transmission-type detecting unit, a plurality of detecting units are divided into two groups of ranks and arrange in the square crossing of same plane, make laser beam form grid, the light of blocking some ranks when tested object passes through the laser beam grid produces detection information.
2. laser beam grid photoelectric sensor according to claim 1, it is characterized in that: that utilizes laser diode well converges performance, in conjunction with the shading orifice plate that is provided with before the light activated element, make the output state signal of each detecting unit only depend on whether the light path of this unit is subjected to stopping of tested object, the light of adjacent detecting unit does not influence each other.
3. laser beam grid photoelectric sensor according to claim 1, it is characterized in that: the output signal of each detecting unit is drawn separately and is gathered.
4. laser beam grid photoelectric sensor according to claim 1, it is characterized in that: the distance of laser tube and light activated element changes arbitrarily according to the needs of sensing range in each detecting unit, the quantity of every row and every row detecting unit without limits, needs according to sensing range are determined, the arrangement pitches of detecting unit is determined according to the size of tested object without limits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420064665 CN2703254Y (en) | 2004-06-03 | 2004-06-03 | Laser beam grid photoelectric sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420064665 CN2703254Y (en) | 2004-06-03 | 2004-06-03 | Laser beam grid photoelectric sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2703254Y true CN2703254Y (en) | 2005-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420064665 Expired - Fee Related CN2703254Y (en) | 2004-06-03 | 2004-06-03 | Laser beam grid photoelectric sensor |
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| CN (1) | CN2703254Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214002A (en) * | 2010-04-08 | 2011-10-12 | 颜涌 | Human-machine interface input equipment operated by using light beam and interdicting way of light beam |
| CN103267537A (en) * | 2013-05-13 | 2013-08-28 | 东莞市嘉准电子科技有限公司 | Four-face light-emitting window exterior optical fiber tube |
| CN108824906A (en) * | 2018-06-29 | 2018-11-16 | 仲恺农业工程学院 | It is a kind of that corrector of moving backward is stopped based on photosensitive sensor design |
| CN109539893A (en) * | 2018-10-18 | 2019-03-29 | 珠海强源体育用品有限公司 | A kind of automatic scoring round target device |
| CN111442739A (en) * | 2020-04-02 | 2020-07-24 | 上海海洋大学 | Calibration system for underwater three-dimensional imaging of moving water tank and construction method |
| CN112504129A (en) * | 2020-10-30 | 2021-03-16 | 北京全路通信信号研究设计院集团有限公司 | Non-contact multi-rail crawling displacement monitoring method and monitoring system based on laser detection |
-
2004
- 2004-06-03 CN CN 200420064665 patent/CN2703254Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214002A (en) * | 2010-04-08 | 2011-10-12 | 颜涌 | Human-machine interface input equipment operated by using light beam and interdicting way of light beam |
| CN103267537A (en) * | 2013-05-13 | 2013-08-28 | 东莞市嘉准电子科技有限公司 | Four-face light-emitting window exterior optical fiber tube |
| CN108824906A (en) * | 2018-06-29 | 2018-11-16 | 仲恺农业工程学院 | It is a kind of that corrector of moving backward is stopped based on photosensitive sensor design |
| CN109539893A (en) * | 2018-10-18 | 2019-03-29 | 珠海强源体育用品有限公司 | A kind of automatic scoring round target device |
| CN111442739A (en) * | 2020-04-02 | 2020-07-24 | 上海海洋大学 | Calibration system for underwater three-dimensional imaging of moving water tank and construction method |
| CN111442739B (en) * | 2020-04-02 | 2022-03-01 | 上海海洋大学 | Calibration system for underwater three-dimensional imaging of moving water tank and construction method |
| CN112504129A (en) * | 2020-10-30 | 2021-03-16 | 北京全路通信信号研究设计院集团有限公司 | Non-contact multi-rail crawling displacement monitoring method and monitoring system based on laser detection |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |