CN103162937B - Comprehensive detection method of laser ray light source and system for achieving the same - Google Patents
Comprehensive detection method of laser ray light source and system for achieving the same Download PDFInfo
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- CN103162937B CN103162937B CN201110422745.3A CN201110422745A CN103162937B CN 103162937 B CN103162937 B CN 103162937B CN 201110422745 A CN201110422745 A CN 201110422745A CN 103162937 B CN103162937 B CN 103162937B
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Abstract
The invention provides a comprehensive detection method of a laser ray light source and a system for achieving the method. An area array charge coupled device (CCD) module and a linear array CCD module are placed on a measurement point simultaneously so as to obtain an image of a laser ray of the measurement point and information of the position and ray width of the laser ray, the width and straightness of the laser ray can be detected accurately, the defect that the circumstance of the laser ray can not be truly reflected caused by personal errors and sampling detection is avoided effectively, detection precision is improved, and detection results can be shown to people visually in a manner of images, and therefore the method and the system are easy to accept and popularize for people, the method is simple in operation, and the system is simple in structure, easy to realize and low in cost.
Description
Technical field
The invention belongs to laser measuring technology, be specifically related to a kind of method for comprehensive detection of laser line light source and realize the system of the method.
Background technology
What laser line light source was made up of laser diode, optical element, hardware and electronic circuit can produce redness or green visible straight line laser, can be widely used in the other products such as indoor and outdoor decoration graticule location.
Formed line is laser rays on projection surface for laser line light source, and the linearity of laser rays, width, line matter are its main indexs.
The quantization means of the straight line laser degree of crook that linearity and laser line light source are launched.
As depicted in figs. 1 and 2, setting laser line source is perpendicular to graticule receiving screen, and receiving screen is apart from laser line light source O point place 10m; Connect two critical point A and B(A, parallel lines that B is nadir on graticule receiving screen), graticule is looked for distance straight line AB solstics C; Cross the vertical line CD that C point does AB straight-line segment; Export center " O " point crossing light source connects C, D 2 point, then ∠ COD represents the linearity of this graticule.
Laser rays can bend with the form shown in Fig. 1 in theory, but there will be the wave shown in Fig. 2 also known as S line due to the problem laser rays of optical element, sometimes also there will be hop of certain point as shown in Figure 3.General measure adopts sampling 3 or 5 mensurations, cannot react the linearity of laser rays more really, because wave and hop can make sample point become random, adds many producers and adopts human eye observation to make measurement become more random.
The detection that current laser line light source line is directly spent generally adopts two large class methods, a kind of method of shooting that adopts is measured, utilize area array CCD as signal collecting element, be placed on the check point of needs measurement, by Video segmentation device and display, the image of multiple measurement point is shown in face of detection person, although this kind of method is directly perceived but judge that its precision of precision is low eventually through human eye, personal error is large.
Another kind of is adopt line array CCD, although precision is high, the light-sensitive surface of line array CCD is less on the one hand, adopts the mode of putting 3-5 sample point truly cannot reflect that the line of laser rays directly spends situation on the other hand, and not directly perceived, make a lot of personage in the industry cannot really accept this kind of measuring method.
Along with the progress of technology, occur that such as publication number is CN102062579A, the application for a patent for invention that name is called " a kind of line array CCD measures detection method and the device thereof of laser beam position and live width ", this application for a patent for invention discloses the method utilizing line array CCD measuring laser beam position and live width.
Summary of the invention
The object of invention is the large shortcoming with insider cannot be made really to accept of detection personal error that the current laser line light source line of solution is directly spent.
For reaching above-mentioned purpose, invention provides a kind of method for comprehensive detection of laser line light source, comprises step: 1) on the projection surface of this word laser module, divide this spread angle equally in the scope of 120 ° and form the equal territory, face of several edge angles;
2) edge in above-mentioned each territory and the intersection point of the laser rays of a word laser module on projection surface is got, with the mid point of the laser rays between adjacent intersection point for measurement point, and put area array CCD module and line array CCD module, with the position of the image and laser rays that obtain the laser rays of this measurement point and line width information in this measurement point;
3) utilize rotation platform that one word laser module is rotated, to realize the detection to whole laser rays;
4) position of laser rays measured according to the line array CCD module of each measurement point obtained and line width information, judge laser rays be whether S curve or its on whether have hop; If so, then terminate the detection to laser rays, if not, then proceed to step 5);
5) according to position and the line width information of the laser rays of each measurement point obtained, judge that whether the slope of the geometric locus of each measurement point is consistent, if so, then show that this laser rays is straight line, then calculate the straight line angle value of this laser rays if not, and terminate the detection to laser rays.
Above-mentioned steps 4) in laser rays whether be the decision method of S curve be, whether the geometric locus that the position of the laser rays whether image of the laser rays observing the area array CCD module of each measurement point obtain obtains according to line array CCD module for S curve or observation and line width information are depicted is S curve, can judge this laser rays whether as S curve.
Above-mentioned steps 4) in laser rays on whether have the judgment mode of hop to be, the geometric locus majority that the position of laser rays obtained according to line array CCD module and line width information are depicted is a straight path, departs from the geometric locus of this straight path, show that this laser rays has hop if occur.
Above-mentioned steps 5) in geometric locus be the geometric locus that the position of laser rays that obtains according to line array CCD module and line width information are depicted.
Above-mentioned steps 5) process that calculates the straight line angle value of laser rays is: two limits of the projectional angle of line taking laser and the first intersection point of projection surface and the second intersection point, then the line point C farthest crossing this first intersection point of distance on laser rays and the second intersection point does the vertical line perpendicular to this line, must the intersection point D of this vertical line and this line, then by central point O and the described some C farthest of the center light hole of linear laser source, the angle ∠ COD that intersection point D forms is described straight line angle value, this ∠ COD=arctgCD/OD, wherein CD is the maximum position variable quantity of the laser rays that line array CCD module is measured, OD is measuring distance.
Simultaneously, the invention provides a kind of system realizing the method for comprehensive detection of above-mentioned laser line light source, it is characterized in that: comprise a word laser module, in order to obtain the image of measurement point area array CCD module, in order to the position and live width of detecting the laser rays of measurement point line array CCD module, drive the rotation platform that a described word laser module rotates and the PC detected image of described area array CCD module being shown, the data of described line array CCD module are processed, described area array CCD module and line array CCD module are all arranged on described measurement point.
Above-mentioned rotation platform is the vertical pivot system of electronic theodolite.
The advantage of invention is: not only can the width of detection laser line and linearity accurately, effectively avoid personal error and sampling Detection cannot the defect of situation of actual response laser rays, improve the precision of detection, and testing result can be presented to people in the form of images intuitively, be easy to people accept and promote, and method is simple to operate, system architecture is simply easy to realize, with low cost.
Accompanying drawing explanation
Below with reference to accompanying drawing, invention is described in further details:
Fig. 1 is that laser rays bends schematic diagram.
The schematic diagram of Fig. 2 to be laser rays be wave.
Fig. 3 is the system schematic of the method for comprehensive detection realizing laser line light source.
Fig. 4 is laser rays track schematic diagram when being straight line.
The track schematic diagram of Fig. 5 to be laser rays be S line.
Fig. 6 is the track schematic diagram of the laser rays having hop.
In figure: 1, a word laser module; 2, area array CCD module; 3, line array CCD module.
Embodiment
The present embodiment solves the large shortcoming with insider cannot be made really to accept of detection personal error that current laser line light source line is directly spent, present embodiments provide a kind of method for comprehensive detection of laser line light source, comprise the following steps: 1) on the projection surface of this word laser module, divide this spread angle equally in the scope of 120 ° and form the equal territory, face of several edge angles;
2) edge in above-mentioned each territory and the intersection point of the laser rays of a word laser module on projection surface is got, with the mid point of the laser rays between adjacent intersection point for measurement point, and put area array CCD module and line array CCD module, with the position of the image and laser rays that obtain the laser rays of this measurement point and line width information in this measurement point;
3) utilize rotation platform that one word laser module is rotated, to realize the detection to whole laser rays;
4) position of laser rays measured according to the line array CCD module of each measurement point obtained and line width information, judge laser rays be whether S curve or its on whether have hop; If so, then terminate the detection to laser rays, if not, then proceed to step 5);
5) according to position and the line width information of the laser rays of each measurement point obtained, judge that whether the slope of the geometric locus of each measurement point is consistent, if, then show that this laser rays is straight line (as shown in Figure 4), then calculate the straight line angle value of this laser rays if not, and the detection terminated laser rays, the computation process of the straight line angle value herein related to is (composition graphs 2): two limits of the projectional angle of line taking laser and the first intersection point A of projection surface and the second intersection points B, then the line AB point C farthest crossing this first intersection point A of distance on laser rays ACB and the second intersection points B is the vertical line CD perpendicular to this line AB, must the intersection point D(intersection point of this vertical line CD and this line AB), then by central point O and the described some C farthest of the center light hole of linear laser source, the angle ∠ COD that intersection point D forms is the straight line angle value of laser rays ACB, this ∠ COD=arctgCD/OD, wherein CD is the maximum position variable quantity of the laser rays that line array CCD module is measured, OD is measuring distance.
Whether the laser rays in step 4) is the decision method of S curve, whether the geometric locus that the position of the laser rays whether image of the laser rays observing the area array CCD module of each measurement point obtain obtains according to line array CCD module for S curve or observation and line width information are depicted is S curve, can judge this laser rays whether as S curve.
Whether the laser rays in step 4) there is the judgment mode of hop be, the geometric locus majority that the position of laser rays obtained according to line array CCD module and line width information are depicted is a straight path, departs from the geometric locus of this straight path, show that this laser rays has hop if occur.
Geometric locus in step 5) is the geometric locus depicted according to position and the line width information of the laser rays of line array CCD module acquisition.
Be not difficult to find out by the judgement of hop, S line or linearity, geometric locus in said method, in fact just according to the curve that the positional information of the laser rays of line array CCD module acquisition is described, each position of the laser rays obtained by the line array CCD module of each measurement point is joined to one another and can obtains this curve, and when the laser rays line width information utilizing the line array CCD module of each measurement point to obtain, the curve depicted is then the curve with one fixed width that can characterize laser rays width.
The position of the laser rays according to the acquisition of line array CCD module related in the present embodiment and line width information, software can be utilized to make computing machine depict geometric locus corresponding to these information, more intuitively to reflect the situation of laser rays, also can not need to describe this geometric locus, namely by the method for some data analyses, judge the linearity of laser rays, whether be S line or whether have hop, algorithm prior art about these is a lot, and the present embodiment is obviously have selected the position of laser rays and geometric locus corresponding to line width information to be depicted by computing machine, object is exactly to make testing result more for directly perceived and easy, be easy to insider accept.
Meanwhile, the invention provides a kind of system realizing the method for comprehensive detection of above-mentioned laser line light source as shown in Figure 3, comprise a word laser module 1, in order to obtain measurement point E, F, the area array CCD module 2 of the image of G, in order to detect measurement point E, F, the rotation platform (not shown) of the position of the laser rays of G and the line array CCD module 3 of live width and the rotation of drive one word laser module 1, and the detected image of area array CCD module 2 is shown, to the PC that the data of line array CCD module 3 process, area array CCD module 2 and line array CCD module 3 are all arranged on measurement point E, F, G place i.e. each measurement point E, F, G place is respectively arranged with an area array CCD module 2 and line array CCD module 3, this measurement point E, F, G specifically obtains like this, the i.e. spread angle ∠ AOD of decile one word laser module 1, each sub-multiple angle (is that spread angle ∠ AOD has been divided into trisection in Fig. 1, each sub-multiple angle is 40 °) must be crossing with the laser rays AD of word laser module 1 on projection surface, as shown in Figure 1, intersection point is B respectively, C, D, then gets consecutive point A, B, C, laser rays AB between D, BC, the mid point E of CD, F, G, with this E, F, G point is as measurement point.
The vertical pivot system of what the rotation platform in the present embodiment was selected is electronic theodolite.Area array CCD module 2 is for realizing the camera of microshot, and the image of its shooting is directly shown by PC, operator can be observed more intuitively and the situation that hop or S line and line are not straight also easily allow insider accept.Line array CCD module 3 then ensure that the high precision of detection, and rotation platform then by driving laser module to rotate, achieves the detection to whole laser rays, and effectively overcoming sampling Detection cannot the shortcoming of situation of actual response laser rays.
(in seconds), this ∠ COD=arctgCD/OD, wherein CD is the maximum position variable quantity of the maximum laser that line array CCD module is measured, and OD is measuring distance.
What the line array CCD module in the present embodiment utilized is publication number is CN102062579A, name is called that a kind of line array CCD measures the device in the detection method of laser beam position and live width and device thereof, namely by programmable digital logic device or other electron device, line array CCD is driven, the position of line array CCD light-sensitive surface and the judgement of live width is incided by measuring, thus obtaining the photoelectric detection system of laser in the absolute position of CCD light-sensitive surface---the line array CCD module related to namely in the present embodiment all adopts this device, this device has RS485 communication interface, be connected with master control system, being connected with the RS485 communication of master control system can be wired also can be wireless connections (namely wireless connections adopt wireless module to dock with RS485 interface).
Master control system wherein: mainly complete the reception of PC order and the management to the control of CCD apparatus module, the transmission of data and power supply.Master control system is by serial ports or USB port and PC communication.
PC: transmit the measurement data that the reception master control system of ordering transmits CCD apparatus module by serial ports or USB port, and the reflection laser position utilizing application software transmission and live width data carry out data analysis and trajectory analysis, and complete the function such as preservation and printing of corresponding data, and final judgement is done to laser line light source.And the image of multiple (Figure 3 shows that 3) the individual camera directly demonstrated in PC system makes operator observe the situation that tune point or S line and line are not straight more intuitively.Also easily allow and accept in the industry.
More than exemplifying is only illustrating invention, does not form the restriction of protection domain to invention, everyly all belongs within the protection domain of invention with the same or analogous design of invention.
Claims (7)
1. a method for comprehensive detection for laser line light source, is characterized in that, comprises the following steps:
1) on the projection surface of a word laser module, divide this spread angle equally in the scope of 120 ° and form the equal territory, face of several edge angles;
2) edge in above-mentioned each territory and the intersection point of the laser rays of a word laser module on projection surface is got, with the mid point of the laser rays between adjacent intersection point for measurement point, and put area array CCD module and line array CCD module, with the position of the image and laser rays that obtain the laser rays of this measurement point and line width information in this measurement point;
3) utilize rotation platform that one word laser module is rotated, to realize the detection to whole laser rays;
4) position of laser rays measured according to the line array CCD module of each measurement point obtained and line width information, judge laser rays be whether S curve or its on whether have hop; If so, then terminate the detection to laser rays, if not, then proceed to step 5);
5) according to position and the line width information of the laser rays of each measurement point obtained, judge that whether the slope of the geometric locus of each measurement point is consistent, if so, then show that this laser rays is straight line, then calculate the straight line angle value of this laser rays if not, and terminate the detection to laser rays.
2. the method for comprehensive detection of laser line light source as claimed in claim 1, it is characterized in that: whether be the laser rays in described step 4) if being the decision method of S curve, whether the geometric locus that the position of the laser rays whether image of the laser rays observing the area array CCD module of each measurement point obtain obtains according to line array CCD module for S curve or observation and line width information are depicted is S curve, can judge this laser rays whether as S curve.
3. the method for comprehensive detection of laser line light source as claimed in claim 1, it is characterized in that: whether the laser rays in described step 4) has the judgment mode of hop be, the geometric locus majority that the position of laser rays obtained according to line array CCD module and line width information are depicted is a straight path, departs from the geometric locus of this straight path, show that this laser rays has hop if occur.
4. the method for comprehensive detection of laser line light source as claimed in claim 1, is characterized in that: the geometric locus in described step 5) is the geometric locus depicted according to position and the line width information of the laser rays of line array CCD module acquisition.
5. the method for comprehensive detection of laser line light source as claimed in claim 1, it is characterized in that: the process that described step 5) calculates the straight line angle value of laser rays is: two limits of the projectional angle of line taking laser and the first intersection point of projection surface and the second intersection point, then the line point C farthest crossing this first intersection point of distance on laser rays and the second intersection point does the vertical line perpendicular to this line, must the intersection point D of this vertical line and this line, then by central point O and the described some C farthest of the center light hole of linear laser source, the angle ∠ COD that intersection point D forms is described straight line angle value, this ∠ COD=arctgCD/OD, wherein CD is the maximum position variable quantity of the laser rays that line array CCD module is measured, OD is measuring distance.
6. one kind realizes the system of the method for comprehensive detection of laser line light source according to claim 1, it is characterized in that: comprise a word laser module, in order to obtain the image of measurement point area array CCD module, in order to the position and live width of detecting the laser rays of measurement point line array CCD module, drive the rotation platform that a described word laser module rotates and the PC detected image of described area array CCD module being shown, the data of described line array CCD module are processed, described area array CCD module and line array CCD module are all arranged on described measurement point.
7. system as claimed in claim 6, is characterized in that: described rotation platform is the vertical pivot system of electronic theodolite.
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| CN114354137B (en) * | 2021-12-28 | 2023-11-28 | 中国航空工业集团公司北京长城航空测控技术研究所 | Linear laser nonstandard performance detection platform and linear laser characteristic parameter detection method |
| CN115389173B (en) * | 2022-10-26 | 2023-03-24 | 潍坊歌尔电子有限公司 | Laser bifurcation self-checking method and device, desktop projector and storage medium |
| CN115406544B (en) * | 2022-11-01 | 2023-03-14 | 四川省药品检验研究院(四川省医疗器械检测中心) | Method, device and system for measuring straightness of positioning line of laser positioning light source |
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