CN103557835B - Laser ranging system and method - Google Patents
Laser ranging system and method Download PDFInfo
- Publication number
- CN103557835B CN103557835B CN201310536281.8A CN201310536281A CN103557835B CN 103557835 B CN103557835 B CN 103557835B CN 201310536281 A CN201310536281 A CN 201310536281A CN 103557835 B CN103557835 B CN 103557835B
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- Prior art keywords
- sensitive cell
- photo
- incidence hole
- emission element
- laser
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
- G01C3/26—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with fixed angles and a base of variable length, at, near, or formed by the object
Abstract
The invention provides a kind of laser ranging system, comprising: photo-sensitive cell; Be arranged on the incidence hole above described photo-sensitive cell; Be arranged on the laser emission element of described photo-sensitive cell side, described laser emission element is for launching the laser beam vertical with described photo-sensitive cell.The present invention can ensure to measure quick identification, precision is high, cost is low.
Description
Technical field
The present invention relates to bar-code identification field, particularly relate to a kind of laser ranging system and method.
Background technology
Current distance-finding method generally adopts Emission Lasers to find range, and laser ranging is generally adopted and carried out measuring distance in two ways: impulse method and phase method.The process of impulse method range finding is that the laser launched by distance measuring equipment is received by distance measuring equipment again after the reflection of object being measured, the distance measuring equipment time that recording laser is round simultaneously.The half of the product of the light velocity and two-way time is exactly the distance between distance measuring equipment and object being measured.Phase shift rangefinder is the frequency with radio wave band, carries out amplitude modulation(PAM) and measure light modulated coming and going once the produced phase delay of object being measured to laser beam, then according to the wavelength of light modulated, the distance converted representated by this phase delay.
But impulse method is generally only applicable to long distance ranging, and mostly bar code scan is short distance, and impulse method range finding can because too shortly cannot accurately calculate distance reflection interval in short distance.Although phase shift rangefinder is applicable to short distance high-acruracy survey, apparatus structure is complicated, cost intensive, and volume is large, be not suitable for barcode scan engine with the use of.
Summary of the invention
The object of the present invention is to provide a kind of laser ranging system, accurately can measure bar code reading head range-to-go.
Another object of the present invention is to provide a kind of laser distance measurement method, above-mentioned laser ranging system can be utilized accurately to measure bar code reading head range-to-go.
Corresponding a kind of laser ranging system, comprising:
Photo-sensitive cell;
Be arranged on the incidence hole above described photo-sensitive cell;
Be arranged on the laser emission element of described photo-sensitive cell side, described laser emission element is for launching the laser beam vertical with described photo-sensitive cell.
As a further improvement on the present invention, the transmitting terminal of described laser emission element is provided with lens pillar.
As a further improvement on the present invention, described incidence hole is provided with preposition eyeglass.
As a further improvement on the present invention, be provided with shadow shield above described photo-sensitive cell, described incidence hole is arranged on described shadow shield.
As a further improvement on the present invention, the vertical projection of center on described photo-sensitive cell of described incidence hole is positioned at the center of described photo-sensitive cell.
As a further improvement on the present invention, described photo-sensitive cell comprises CCD.
Utilize a laser distance measurement method for above-mentioned laser ranging system accordingly, the method comprises the following steps:
Laser emission element Emission Lasers bundle, and on target object, be imaged as the first image;
Photo-sensitive cell catches the light of described first image through incidence hole, and is imaged as the second image thereon;
Calculate described second image and the distance CE of described incidence hole on described photo-sensitive cell between vertical projection;
Calculate the distance AB between described laser emission element and target object, its computing formula is:
, wherein, AE is laser emission element and the distance of described incidence hole on described photo-sensitive cell between vertical projection, and DE is the distance between incidence hole and photo-sensitive cell.
Compared with prior art, the present invention forms two similar triangles by the round of laser and device itself, measures bar code reading head range-to-go, can ensure to measure quick identification, precision is high, cost is low according to the relation of similar triangles.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of an embodiment of the present invention.
Embodiment
Describe the present invention below with reference to embodiment shown in the drawings.But these embodiments do not limit the present invention, the structure that those of ordinary skill in the art makes according to these embodiments, method or conversion functionally are all included in protection scope of the present invention.
As shown in Figure 1, an embodiment of the present invention.Laser ranging system comprises laser emission element A, photo-sensitive cell 10, incidence hole D.Together with laser emission element A is arranged side by side with photo-sensitive cell 10, laser emission element A is arranged on the side of photo-sensitive cell 10, photo-sensitive cell 10 preferably adopts wire CCD, and the laser vertical that laser emission element A sends in photo-sensitive cell 10, and forms the first image B on object.In order to ensure the first image B imaging clearly on photo-sensitive cell 10, be preferably provided with lens pillar at the transmitting terminal of laser emission element A.Above photo-sensitive cell 10, be provided with incidence hole D, be provided with shadow shield above photo-sensitive cell 10, incidence hole D is arranged on shadow shield.Photo-sensitive cell 10 has the projection E of incidence hole D on photo-sensitive cell 10, preferably, the vertical projection of center on photo-sensitive cell 10 of incidence hole D is positioned at the center of photo-sensitive cell 10.According to the principle of linear propagation of light, the first image B can form second image C at the projection E of photo-sensitive cell 10 relative to the opposite side of laser emission element A at incidence hole D by incidence hole D.Enter in photo-sensitive cell 10 to prevent dust and affect photosensitive effect, incidence hole D place is provided with preposition eyeglass.
Adopt above-mentioned laser ranging system to measure, first laser emission element A Emission Lasers bundle, and on target object, be imaged as the first image B.Photo-sensitive cell catches the light of the first image B through incidence hole D, and is imaged as the second image C thereon.Photo-sensitive cell 10 utilizes image processing method to calculate the second image C and the distance CE of incidence hole D on photo-sensitive cell 10 between vertical projection by processor.The triangle that laser emission element A, the first image B and the second image C are formed, the triangle similar triangles each other formed at projection E and the second image C of photo-sensitive cell 10 with incidence hole D, incidence hole D, therefore calculate the distance AB between described laser emission element A and target object, its computing formula is:
, wherein, AE is laser emission element A and the distance of incidence hole D on photo-sensitive cell 10 between vertical projection E, and be fixing known, DE is the distance between incidence hole D and photo-sensitive cell 10, is known fixed.
In sum, the present invention forms two similar triangles by the round of laser and device itself, and measure bar code reading head range-to-go according to the relation of similar triangles, can ensure to measure quick identification, precision is high, distance measuring equipment cost is low.
Be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
A series of detailed description listed is above only illustrating for feasibility embodiment of the present invention; they are also not used to limit the scope of the invention, all do not depart from the skill of the present invention equivalent implementations done of spirit or change all should be included within protection scope of the present invention.
Claims (1)
1. a laser ranging system, for measuring bar code reading head range-to-go, is characterized in that, comprise:
Photo-sensitive cell, described photo-sensitive cell comprises wire CCD, is provided with shadow shield above described photo-sensitive cell;
Be arranged on the incidence hole above described photo-sensitive cell, described incidence hole is arranged on described shadow shield, and described incidence hole is provided with preposition eyeglass, and the vertical projection of center on described photo-sensitive cell of described incidence hole is positioned at the center of described photo-sensitive cell;
Be arranged on the laser emission element of described photo-sensitive cell side, the transmitting terminal of described laser emission element is provided with lens pillar, and described laser emission element is for launching the laser beam vertical with described photo-sensitive cell;
Described laser emission element Emission Lasers bundle, and on target object, be imaged as the first image;
Described photo-sensitive cell catches the light of described first image through incidence hole, and is imaged as the second image thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310536281.8A CN103557835B (en) | 2013-11-04 | 2013-11-04 | Laser ranging system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310536281.8A CN103557835B (en) | 2013-11-04 | 2013-11-04 | Laser ranging system and method |
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| Publication Number | Publication Date |
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| CN103557835A CN103557835A (en) | 2014-02-05 |
| CN103557835B true CN103557835B (en) | 2016-01-06 |
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| CN201310536281.8A Active CN103557835B (en) | 2013-11-04 | 2013-11-04 | Laser ranging system and method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10378881B2 (en) | 2013-03-13 | 2019-08-13 | Robert Bosch Gmbh | Distance measuring device |
| WO2015165008A1 (en) * | 2014-04-28 | 2015-11-05 | 深圳市大疆创新科技有限公司 | Measurement apparatus and unmanned aerial vehicle |
| CN109188843A (en) * | 2018-10-24 | 2019-01-11 | 泉州市新锐极光科技有限公司 | It is a kind of can auto-focusing ultrashort out-of-focus projection's device and method thereof |
Citations (3)
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| US3325647A (en) * | 1963-10-18 | 1967-06-13 | Sud Aviation | Dual photocell optical telemeter using phase comparison |
| DE4445535A1 (en) * | 1994-12-20 | 1996-06-27 | Tr Elektronic Gmbh | Optical sensor for measuring distance |
| CN1493845A (en) * | 2002-09-26 | 2004-05-05 | 夏普株式会社 | Optical displacement sensor |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5995336U (en) * | 1982-12-17 | 1984-06-28 | ソニー株式会社 | Video camera |
| JPS60154107A (en) * | 1984-01-24 | 1985-08-13 | Canon Inc | Distance measuring device |
| JPS60178413A (en) * | 1984-02-27 | 1985-09-12 | Asahi Optical Co Ltd | Focus correcting device of camera |
| JPS61207913A (en) * | 1985-03-11 | 1986-09-16 | Seiko Instr & Electronics Ltd | Optical distance measuring instrument |
| JP3058299B2 (en) * | 1991-07-26 | 2000-07-04 | オムロン株式会社 | Displacement sensor |
| JPH09257470A (en) * | 1996-03-26 | 1997-10-03 | Matsushita Electric Works Ltd | Optical displacement sensor |
| JP3633713B2 (en) * | 1996-04-23 | 2005-03-30 | 松下電器産業株式会社 | Distance measuring method and distance sensor |
| JP5314239B2 (en) * | 2006-10-05 | 2013-10-16 | 株式会社キーエンス | Optical displacement meter, optical displacement measuring method, optical displacement measuring program, computer-readable recording medium, and recorded device |
| EP2620894B1 (en) * | 2012-01-26 | 2014-01-08 | Sick AG | Optoelectronic sensor and method for recording object information |
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2013
- 2013-11-04 CN CN201310536281.8A patent/CN103557835B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3325647A (en) * | 1963-10-18 | 1967-06-13 | Sud Aviation | Dual photocell optical telemeter using phase comparison |
| DE4445535A1 (en) * | 1994-12-20 | 1996-06-27 | Tr Elektronic Gmbh | Optical sensor for measuring distance |
| CN1493845A (en) * | 2002-09-26 | 2004-05-05 | 夏普株式会社 | Optical displacement sensor |
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| CN103557835A (en) | 2014-02-05 |
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