CN110609333A - Parallel light source grating device - Google Patents
Parallel light source grating device Download PDFInfo
- Publication number
- CN110609333A CN110609333A CN201810613588.6A CN201810613588A CN110609333A CN 110609333 A CN110609333 A CN 110609333A CN 201810613588 A CN201810613588 A CN 201810613588A CN 110609333 A CN110609333 A CN 110609333A
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- light
- parallel
- receivers
- grating device
- emitters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a parallel light source grating device, which comprises a plurality of light emitters for providing light sources, a plurality of light receivers corresponding to the light emitters and capable of receiving light rays, and a plurality of lenses arranged between the light emitters and the light receivers; the lens modulates the light source of the light emitter from general scattered light into parallel light and emits the parallel light towards the light receivers, a plurality of channels of parallel light form a light curtain, and the distance between the light receivers is smaller than the section size of an object; when the object falls and passes through the light curtain, part of the parallel light can be shielded, and at the moment, part of the light receivers cannot receive the parallel light at the moment when the object passes through and cannot receive light emitted from other directions, so that the situation that the object falls and is not detected is avoided, and the accuracy of judging the passing of the object can be improved.
Description
Technical Field
The present invention relates to a grating device; more particularly, to a parallel light source grating device.
Background
Referring to fig. 1 ~ 3, fig. 1 is a schematic diagram of a conventional grating device, fig. 2 is an operation diagram of the grating device, and fig. 3 is another operation diagram of the grating device.
As shown in fig. 1 ~ 3, a conventional light barrier device 1 is usually installed at an exit of an object 2 to detect whether the object is actually delivered, as shown in fig. 1, the conventional light barrier device 1 includes a plurality of light emitters 11 and a plurality of light receivers 12 corresponding to the light emitters 11, wherein the light receivers 12 can receive light sources a emitted by the light emitters 11, and determine whether the object 2 actually drops to the exit according to whether the light sources a are received, that is, when the object 2 drops and passes between the light receivers 12 and the light emitters 11, the light receivers 12 sense that the light sources a are shielded, and then send a signal that the object 2 drops to a vending machine host, after receiving the signal, the vending machine host confirms that the object 2 is delivered, updates information of the object 2, and returns to a shopping mode to provide the next shopping for the consumer.
However, known grating devices have the following disadvantages:
1. the optical receiver 12 is susceptible to interpretation errors (one): as shown in fig. 2, when the object 2 falls and passes between the light receiver 12 and the light emitter 11, although the object 2 shields a part of the light source a from the light emitter 11, since the light source a emitted by each light emitter 11 is usually in a scattering state, the light source a received by the light receiver 12 is in a plurality of scattering states, so that a difference in the density of the light source a is formed at different positions between the light receiver 12 and the light emitter 11, when the object 2 passes between the light receiver 12 and the light emitter 11, if only a part of the light source a is shielded, the light receiver 12 can still receive most of the light source a, so that the object 2 cannot be interpreted, no instruction is transmitted to the vending machine host, and therefore, errors occur in subsequent processing procedures of the vending machine host, possibly causing an error in stock quantity recording of the vending machine host, or failing to send out a true shipment signal, the host machine of the vending machine does not return to the mode of the consumer for selecting the purchase, so that the vending machine can not select the purchase again temporarily.
2. The optical receiver 12 is liable to generate an interpretation error (two): as shown in fig. 3, when the volume of the object 2 ' is too small, the object 2 ' passes between the light emitter 11 and the light receiver 12 to shield only a very small portion of the light source a, and the light receiver 12 still receives most of the other light sources a, and at this time, the light receiver 12 cannot detect that the object 2 ' has fallen to the exit, so that the interpretation error is easily caused.
3. The light source receiving accuracy of the light receiver 12 is difficult to control: to solve the above-mentioned disadvantages, some manufacturers design the optical receiver 12 to determine whether the object falls or not according to the intensity of light or the characteristics of light (direction change, frequency change, etc., which can be set by the user), but the accuracy of the determination is difficult to control, and the light intensity determination setting when all objects pass through cannot be accurately designed, so it is difficult to accurately design the logic.
In view of the above, the applicant of the present invention has made extensive studies on the above-mentioned deficiencies according to research and development experiences in the related fields for many years, and has actively sought a solution to the above-mentioned needs, and completed the present invention through long-term research and many tests.
Disclosure of Invention
The present invention provides a grating device, and more particularly, to a parallel light source grating device capable of improving the accuracy of detecting the falling of an object by adding a lens.
To achieve the above objective, the present invention provides a parallel light source grating device, which comprises a plurality of light emitters, a plurality of light receivers, and a plurality of lenses.
The plurality of light emitters emit light for detecting the object, and the light emitters can be LEDs.
The plurality of light receivers correspond to the plurality of light emitters and are used for receiving light rays so as to judge whether an object passes through or not.
A plurality of lenses are arranged between the plurality of light emitters and the plurality of light receivers, each lens respectively modulates the light source emitted by the corresponding light emitter into a plurality of parallel lights and emits the parallel lights towards the corresponding light receiver, and the plurality of parallel lights form a light curtain; the distance between the light receivers is smaller than the size of the section of the object, and the light receivers detect the object by using a light curtain.
The lens can be a fresnel lens, and the light emitter is disposed at a focal point of the fresnel lens, so that light scattered by the light source of the light emitter can be adjusted into parallel light by the fresnel lens and emitted toward the light receiver.
By means of the structure, each light emitter can scatter the light source towards the lens (Fresnel lens), adjust the scattered light source into a plurality of parallel lights through the lens (Fresnel lens), emit the parallel lights towards the light receiver, and detect whether an object passes through a light curtain formed by the plurality of flat lights; particularly, the light received by the light receiver of the present invention is parallel light, and does not receive light incident in different directions other than the parallel light, so that when the object falls and passes through a plurality of parallel lights (light curtains), a part of the parallel light received by the light receiver is shielded, and at this time, the light receiver is not interfered by light incident in other directions, so that the object does not fall and the object is not sensed, thereby improving the accuracy of determining the passing of the object, and finally, a signal that the object has passed through the parallel light (light curtain) is transmitted to the vending machine main unit, so that the vending machine main unit updates information and returns to a normal state for the consumer to purchase.
In addition, the present invention can be installed at the object exit of the vending machine, or in the gate for controlling the entrance and exit of people, or other equivalent devices for controlling applications, so that the object, people, or other related goods to be controlled can use the present invention to detect the passing time and record the passing quantity.
Drawings
FIG. 1 is a schematic diagram of a known grating device;
FIG. 2 is a schematic diagram of a conventional grating device;
FIG. 3 is another schematic diagram of a conventional grating device;
FIG. 4 is a schematic diagram of a parallel light source grating apparatus according to the present invention;
FIG. 5 is a partially enlarged view of a parallel light source grating device according to the present invention;
FIG. 6 is a schematic diagram of the parallel light source grating device according to the present invention.
Symbolic illustration in the drawings:
3 a parallel light source grating device; 31 a light emitter; a 32 light receiver; 33 a lens; a' a light source; b, a light curtain; 4, the object;
notation in the known art:
1 a grating device; 11 light emitters; 12 an optical receiver; a, a light source; 2. 2' object.
Detailed Description
In order to provide a more complete understanding of the objects, functions, features and structure of the invention, reference should now be made to the preferred embodiments illustrated in the accompanying drawings.
Referring to fig. 4 ~ 6, fig. 4 is a schematic view of a parallel light source grating device of the present invention, fig. 5 is a partially enlarged view of the parallel light source grating device of the present invention, and fig. 6 is an operation view of the parallel light source grating device of the present invention.
As shown in the figure, the parallel light source grating device 3 of the present invention includes a plurality of light emitters 31, a plurality of light receivers 32, and a plurality of lenses 33.
The light emitters 31 emit light sources a' for detecting the object 4, and the light emitters 31 may be LEDs.
The light receivers 32 correspond to the light emitters 31 for receiving light and further determining whether the object 4 passes through.
A plurality of lenses 33 are disposed between the plurality of light emitters 31 and the plurality of light receivers 32, the lenses 33 correspond to the light emitters 31 and the light receivers 32, and the lenses 33 modulate the light source a' emitted by the light emitters 31 into a plurality of parallel lights and emit the parallel lights toward the light receivers 32, so that the plurality of parallel lights form a light curtain B; wherein, the pitch of the multiple parallel lights is smaller than the cross-sectional size of the object 4, and the object 4 is sensed by the multiple parallel lights (light curtain B).
The lens 33 may be a fresnel lens, and the light emitter 31 is disposed at a focal point of the fresnel lens, so that the light source a' of the light emitter 31 is scattered to the fresnel lens, and is adjusted to a plurality of parallel lights, and the light beams are emitted toward the light receiver 32, the plurality of parallel lights form a light curtain B, and the light receiver 32 detects the object 4 by using the light curtain B.
The invention can be especially arranged at the outlet of the object 4 of the vending machine, or a gate for controlling personnel to enter and exit, or other equivalent control application equipment, so that the object 4, personnel or other related goods to be controlled can detect the passing time of the object 4, or the personnel or other related goods to be controlled by the invention, and the passing quantity can be recorded.
The embodiments of the present invention and the related reference figures are detailed as follows:
referring to fig. 4 ~ 6, the present embodiment is described by taking a lens as a fresnel lens and installing the present invention at an object exit of a vending machine as an example.
Firstly, the light emitter 31 emits the light source a ', which may be a point light source provided by an LED, toward the light receiver 32 in a scattering state, and each light emitter 31 is disposed at a focal point of each fresnel lens, so that when the scattered light source a ' is emitted from the focal point, the scattered light source a ' is adjusted into a plurality of parallel lights through the corresponding fresnel lens and emitted toward the light receiver 32, and the plurality of parallel lights form a light curtain B state, and the light receiver 32 can interpret the passing of the object 4 by sensing the light curtain B.
In succession to the above, the light received by the light receiver 32 is all parallel light, and does not receive light incident from other directions, so that when the object 4 is judged to pass through, no light incident from the parallel direction is sensed, and the sensing error can be avoided, thereby solving the problem that the object passes through without sensing, and improving the accuracy of judging and reading the actual delivery of the vending machine.
Furthermore, when the vending machine is in the normal operation mode, the light emitter 31 will keep emitting the light source a', and the light receiver 32 will keep receiving the plurality of parallel lights (light curtains B), and when a consumer purchases the object 4 on the vending machine frame, clicks the object 4 and completes payment, the object 4 will fall from the frame in the vending machine and pass through the parallel lights between the light receiver 32 and the fresnel lens, at this time, the object 4 will shield part of the light curtain B instantaneously, and the light receiver 32 in this instantaneous part will not sense the shielded light curtain B, and there will be no light in other directions entering the light receiver 32, so that it can immediately and accurately determine that the object 4 has passed, and send a signal that the object 4 has passed to the vending machine frame, so that the vending machine frame can confirm the shipment, update the stock of the shipped object 4, and return to the mode for selection by the consumer, for the consumer to make the next purchase.
In addition, the present invention can make each light receiver 32 receive multiple parallel lights, that is, the light curtain B, only by installing a plurality of lenses (fresnel lenses), and the size of the object 4 is larger than the distance between the light receivers 32, so that each light receiver 32 can completely sense the instant when all the objects 4 pass through the light curtain B; when the object 4 passes through the light curtain B, since the light curtain B for sensing the object 4 is all parallel light, the light receiver 32 only senses whether the parallel light is shielded when sensing light, and is not interfered by light emitted from other directions, so that the problem that the object in the prior art passes through the detected light, but the light receiver 32 still receives light from other directions, which causes no judgment on the defect that the object 4 passes through is avoided, and the effect of accurately judging the shipment of the object 4 can be achieved only by simply adding a lens.
In summary, the parallel light source grating device of the present invention has the advantages that:
1. the accurate judgment object really passes through: the light receiver only receives the incident light of a plurality of parallel lights (light curtains) and is not interfered by the light incident from other directions, so when an object passes through the light curtains, the object shields part of the parallel lights received by the light receiver, and at the moment, the light receiver accurately judges that the object passes through, and the defect that the object passes through because the object is not sensed due to the fact that other light rays can be received in the prior art is avoided.
2. The simple components can achieve the accurate detection of the object passing: the invention only adds a plurality of lenses to enable the light source to be changed into parallel light, so that the light receiver can judge whether an object passes through or not only if the parallel light is received and is shielded, and the light receiver can not be influenced by light emitted from other directions, thereby achieving the effect of accurately judging the object passing without complex design.
The above description is only a preferred embodiment of the present invention, and other equivalent structural changes made by applying the present invention to the specification and claims should be included in the claims of the present invention.
Claims (4)
1. A parallel light source grating device comprises a plurality of light emitters, a plurality of light receivers and a plurality of lenses;
the plurality of light emitters emit light sources for detecting an object;
the plurality of light receivers correspond to the plurality of light emitters and are used for receiving light rays and further judging whether an object passes through or not;
the method is characterized in that: a plurality of lenses are arranged between the plurality of light emitters and the plurality of light receivers, the lenses correspond to the light emitters and the light receivers, and the lenses adjust the light sources emitted by the light emitters into a plurality of channels of parallel light and emit the light towards the corresponding light receivers to form a light curtain; the distance between the light receivers is smaller than the cross-sectional size of the object, and the light receivers detect the object by multiple parallel light beams.
2. The source grating device of claim 1, wherein the lens is a fresnel lens and the light emitter is disposed at a focal point of the fresnel lens, such that the scattered light emitted from the light emitter is collimated by the fresnel lens.
3. The parallel light source grating device of claim 1, wherein the parallel light source grating device is disposed at an article exit of a vending machine.
4. The parallel light source grating device of claim 1, wherein the light emitter is an LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613588.6A CN110609333A (en) | 2018-06-14 | 2018-06-14 | Parallel light source grating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613588.6A CN110609333A (en) | 2018-06-14 | 2018-06-14 | Parallel light source grating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110609333A true CN110609333A (en) | 2019-12-24 |
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ID=68887914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810613588.6A Withdrawn CN110609333A (en) | 2018-06-14 | 2018-06-14 | Parallel light source grating device |
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| Country | Link |
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| CN (1) | CN110609333A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6592005B1 (en) * | 2001-05-02 | 2003-07-15 | Scriptpro Llc | Pill count sensor for automatic medicament dispensing machine |
| US20150234049A1 (en) * | 2014-02-18 | 2015-08-20 | onVector Technology, LLC | Object detection systems |
| US20160025556A1 (en) * | 2012-11-29 | 2016-01-28 | Softronics, Ltd. | Optical Sensing System |
| CN207281895U (en) * | 2017-09-21 | 2018-04-27 | 深圳友朋智能商业科技有限公司 | A kind of automatic vending machine |
| CN208421266U (en) * | 2018-06-14 | 2019-01-22 | 大成国际钢铁股份有限公司 | Source of parallel light grating device |
-
2018
- 2018-06-14 CN CN201810613588.6A patent/CN110609333A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6592005B1 (en) * | 2001-05-02 | 2003-07-15 | Scriptpro Llc | Pill count sensor for automatic medicament dispensing machine |
| US20160025556A1 (en) * | 2012-11-29 | 2016-01-28 | Softronics, Ltd. | Optical Sensing System |
| US20150234049A1 (en) * | 2014-02-18 | 2015-08-20 | onVector Technology, LLC | Object detection systems |
| CN207281895U (en) * | 2017-09-21 | 2018-04-27 | 深圳友朋智能商业科技有限公司 | A kind of automatic vending machine |
| CN208421266U (en) * | 2018-06-14 | 2019-01-22 | 大成国际钢铁股份有限公司 | Source of parallel light grating device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191224 |