CN110967702A - Dynamic ranging system and method under high-power pulse laser environment - Google Patents
Dynamic ranging system and method under high-power pulse laser environment Download PDFInfo
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- CN110967702A CN110967702A CN201811159775.8A CN201811159775A CN110967702A CN 110967702 A CN110967702 A CN 110967702A CN 201811159775 A CN201811159775 A CN 201811159775A CN 110967702 A CN110967702 A CN 110967702A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/46—Indirect determination of position data
- G01S17/48—Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves
Abstract
The invention relates to a dynamic ranging system under a high-power pulse laser environment, which is used for measuring the distance between a laser head (1) and a light spot (2) of high-power pulse laser equipment, and comprises a lens (4), a photosensitive sheet (5) and an image processor (6), wherein the relative position of the lens (4), the photosensitive sheet (5) and the lens (4) is fixed, when the dynamic ranging system is used, the distance between the laser head (1) and the lens (4) is not changed, a laser beam forms the light spot on the surface of an object, the laser beam is reflected to the lens (4) to reach the photosensitive sheet (5), the image processor (6) reads the imaging central point of the light spot (2) on the photosensitive sheet (5), and the distance between the laser head (1) and the light spot (2) is calculated by using a geometric relationship. Compared with the prior art, the invention is suitable for ranging of laser equipment with different light sources, has strong stability, easy maintenance and integration and greatly improves the working efficiency.
Description
Technical Field
The invention relates to a distance measuring system, in particular to a dynamic distance measuring system and method under a high-power pulse laser environment.
Background
The laser has four characteristics of high brightness, high directivity, high monochromaticity and high coherence. When the laser equipment is used, in order to obtain extremely high energy density, a light beam needs to be focused on the surface of an object for operation. At present, the laser application successfully realizes the processing of cutting, punching, welding, surface modification and the like, and compared with the traditional mode, the laser processing has the characteristics of high speed, high precision and high adaptability.
In a high power pulse laser apparatus (generally, a high power pulse laser refers to a pulse laser having a peak power of 105 watts or more and an average power of 200 watts or more) when an object is cleaned, welded, cut, or the like, it is necessary to measure a distance from a light spot to a laser head, and adjust a focal length to perform work. Due to the existence of high-power laser spots, the traditional optical distance measuring equipment is seriously interfered, and the distance measurement from the spots to the laser head is difficult to directly measure by the distance measuring equipment. The current common method is to measure in a pre-scanning mode under the condition that high-power pulse laser equipment does not work, store the measured distance information, and call the distance information when needed later. Although the method solves the problem of distance measurement of high-power pulse laser equipment, the flexibility of equipment application is influenced and the working efficiency is reduced due to the need of pre-measurement.
To improve the flexibility of the application of the laser equipment, greatly improve the working efficiency and reduce the production cost, a novel distance measurement means is needed to realize the real-time distance measurement, and the application range of the high-power pulse laser equipment is fundamentally widened.
Disclosure of Invention
The present invention is directed to a dynamic ranging system and method under high power pulsed laser environment to overcome the above-mentioned drawbacks of the prior art.
The purpose of the invention can be realized by the following technical scheme:
a dynamic distance measuring system under the environment of high-power pulse laser is used for measuring the distance between a laser head and a light spot of high-power pulse laser equipment, the system comprises a lens, a photosensitive sheet and an image processor, the relative position of the lens and the photosensitive sheet is fixed, the distance between the lens and the photosensitive sheet is fixed,
when the laser imaging device is used, the distance between the laser head and the lens is unchanged, the laser beam forms a light spot on the surface of an object, the laser beam is reflected to the lens to reach the photosensitive piece, the image processor reads the imaging central point of the light spot on the photosensitive piece, and the distance between the laser head and the light spot is calculated by utilizing the geometric relation.
And a filter is arranged in front of the lens.
The filter is a band-pass filter.
The filter, the lens, the light sensitive plate and the image processor are integrated into one device.
The image processor comprises a camera.
A method for ranging using the ranging system, wherein the distance is calculated by the following formula:
H＝L*h/l
h is the vertical distance between the laser head and the light spot, L is the horizontal distance between the laser head and the central point of the lens, H is the height of the imaging central point of the light spot, the height of the central point of the lens is 0, and L is the horizontal distance between the central point of the lens and the photosensitive film.
Compared with the prior art, the invention has the following advantages:
(1) the laser ranging device is suitable for ranging of laser devices with different light sources, and is strong in stability, easy to maintain, easy to integrate and capable of greatly improving working efficiency.
(2) The filter plate is arranged in front of the lens, so that the filtered laser has good purity, image recognition is facilitated, and the distance measurement accuracy is improved.
(3) The filter, the lens, the light sensitive sheet and the image processor are integrated in one device, and the device is compact in structure and good in stability.
Drawings
FIG. 1 is a schematic structural diagram of a dynamic ranging system according to the present embodiment;
fig. 2 is a schematic diagram illustrating a principle of the distance measuring method according to the embodiment.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
As shown in figure 1, the dynamic distance measuring system under the high-power pulse laser environment is used for measuring the distance between a laser head 1 and a light spot 2 of a high-power pulse laser device, and comprises a lens 4, a photosensitive film 5 and an image processor 6, wherein the relative position of the lens 4 and the photosensitive film 5 is fixed, the distance between the lens 4 and the photosensitive film 5 is fixed,
when the laser scanning device is used, the distance between the laser head 1 and the lens 4 is unchanged, the laser beam forms a light spot on the surface of an object, the laser beam is reflected to the lens 4 to reach the photosensitive film 5, the image processor 6 reads the imaging central point of the light spot 2 on the photosensitive film 5, and the distance between the laser head 1 and the light spot 2 is calculated by using the geometric relation.
The filter 3 is arranged in front of the lens 4, the filter 3 is a band-pass filter, the band-pass range is selected according to laser equipment, the selected band-pass filter is a 1064nm band-pass filter, and light with wavelength different from 1064nm is filtered.
The filter 3, the lens 4, the light-sensing plate 5 and the image processor 6 are integrated in one device.
The image processor 6 includes a camera.
As shown in fig. 2, a method for ranging using a ranging system calculates a distance using the following equation:
H＝L*h/l
h is the vertical distance between the laser head 1 and the light spot 2, L is the horizontal distance between the laser head 1 and the central point of the lens 4, H is the height of the imaging central point of the light spot 2, the height of the central point of the lens 4 is 0, and L is the horizontal distance between the central point of the lens 4 and the photosensitive film 5.
When the spot distance changes by Δ H, the height of the imaging center point of the spot 2 correspondingly changes by Δ H, and at this time, H + Δ H ═ L (H + Δ H)/L, thereby realizing dynamic ranging.
Claims (6)
1. A dynamic distance measuring system under the environment of high-power pulse laser is used for measuring the distance between a laser head (1) and a light spot (2) of high-power pulse laser equipment and is characterized by comprising a lens (4), a photosensitive film (5) and an image processor (6), wherein the relative position of the lens (4) and the photosensitive film (5) is fixed and unchanged,
when the laser scanning device is used, the distance between the laser head (1) and the lens (4) is unchanged, the laser beam forms a light spot on the surface of an object, the laser beam is reflected to the lens (4) to reach the photosensitive piece (5), the image processor (6) reads the imaging central point of the light spot (2) on the photosensitive piece (5), and the distance between the laser head (1) and the light spot (2) is calculated by utilizing the geometric relation.
2. The dynamic distance measuring system in the environment of high power pulse laser according to claim 1, wherein a filter (3) is arranged in front of the lens (4).
3. The dynamic distance measuring system in the environment of high power pulse laser according to claim 2, wherein said filter (3) is a band pass filter.
4. The dynamic distance measuring system in the environment of high power pulse laser according to claim 2, wherein the filter (3), the lens (4), the light sensing plate (5) and the image processor (6) are integrated into one device.
5. The dynamic range finding system in high power pulsed laser environment according to claim 1, wherein the image processor (6) comprises a camera.
6. A method of ranging using a ranging system according to any of claims 1 to 5, wherein the distance is calculated using the formula:
H＝L*h/l
h is the vertical distance between the laser head (1) and the light spot (2), L is the horizontal distance between the laser head (1) and the central point of the lens (4), H is the height of the imaging central point of the light spot (2), the height of the central point of the lens (4) is 0, and L is the horizontal distance between the central point of the lens (4) and the photosensitive piece (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811159775.8A CN110967702A (en) | 2018-09-30 | 2018-09-30 | Dynamic ranging system and method under high-power pulse laser environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811159775.8A CN110967702A (en) | 2018-09-30 | 2018-09-30 | Dynamic ranging system and method under high-power pulse laser environment |
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| CN110967702A true CN110967702A (en) | 2020-04-07 |
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Citations (6)
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| CN101923160A (en) * | 2009-05-29 | 2010-12-22 | 喜利得股份公司 | The laser equipment that is used for electro-optical distance measurement |
| CN102032895A (en) * | 2009-09-30 | 2011-04-27 | 深圳科奥智能设备有限公司 | Electronic device with ranging function, ranging system and ranging method |
| CN102622890A (en) * | 2012-04-16 | 2012-08-01 | 公安部第三研究所 | Laser ranging-based road vehicle information acquisition node device |
| CN105717513A (en) * | 2015-01-30 | 2016-06-29 | 北京雷动云合智能技术有限公司 | Low-cost laser distance measurement apparatus and method based on common pick-up head chip |
| CN106092146A (en) * | 2016-08-30 | 2016-11-09 | 宁波菜鸟智能科技有限公司 | Laser ranging bearing calibration and system |
| CN107042223A (en) * | 2017-04-14 | 2017-08-15 | 上海铁路通信有限公司 | A kind of laser cleaning machine handheld terminal for metal base |
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2018
- 2018-09-30 CN CN201811159775.8A patent/CN110967702A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923160A (en) * | 2009-05-29 | 2010-12-22 | 喜利得股份公司 | The laser equipment that is used for electro-optical distance measurement |
| CN102032895A (en) * | 2009-09-30 | 2011-04-27 | 深圳科奥智能设备有限公司 | Electronic device with ranging function, ranging system and ranging method |
| CN102622890A (en) * | 2012-04-16 | 2012-08-01 | 公安部第三研究所 | Laser ranging-based road vehicle information acquisition node device |
| CN105717513A (en) * | 2015-01-30 | 2016-06-29 | 北京雷动云合智能技术有限公司 | Low-cost laser distance measurement apparatus and method based on common pick-up head chip |
| CN106092146A (en) * | 2016-08-30 | 2016-11-09 | 宁波菜鸟智能科技有限公司 | Laser ranging bearing calibration and system |
| CN107042223A (en) * | 2017-04-14 | 2017-08-15 | 上海铁路通信有限公司 | A kind of laser cleaning machine handheld terminal for metal base |
Non-Patent Citations (1)
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| 王飞等: "多脉冲增益调制三维实时成像系统", 《中国激光》 * |
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