CN202420821U

CN202420821U - Comprehensive detecting system for laser line light sources

Info

Publication number: CN202420821U
Application number: CN 201120528200
Authority: CN
Inventors: 孙建华; 袁科
Original assignee: Xian Huanic Optoelectronic Corp Ltd
Current assignee: Xian Huanic Optoelectronic Corp Ltd
Priority date: 2011-12-16
Filing date: 2011-12-16
Publication date: 2012-09-05
Anticipated expiration: 2021-12-16

Abstract

The utility model provides a comprehensive detecting system for laser line light sources, which comprises a straight laser module, a planar array CCD (charge coupled device) module, a linear CCD module, a rotary platform and a PC (personal computer). The planar array CCD module is used for acquiring an image of a measured point, the linear array CCD module is used for detecting the position and the line width of laser rays of the measured point, the rotary platform drives the straight laser module to rotate, the PC displays the image detected by the planar array CCD module and processes data of the linear array CCD module, and both the planar array CCD module and the linear array CCD module are disposed at the measured point. By the aid of the system, the width and the linearity of the laser rays can be accurately detected, the shortcoming that the condition of the laser rays cannot be truly reflected due to artificial errors and a sampling detection mode is effectively overcome, detection precision is improved, a detection result can be visually shown to people in an image form, and the comprehensive detecting system is well received by people, and is easy to be popularized, simple in method, operation and structure, easy to be implemented and low in cost.

Description

A kind of comprehensive detection system of laser line light source

Technical field

The utility model belongs to laser measuring technology, is specifically related to a kind of comprehensive detection system of laser line light source.

Background technology

Laser line light source can produce redness or green visible straight line laser by what laser diode, optical element, hardware and electronic circuit were formed, can be widely used in the other products such as indoor and outdoor decoration graticule location.

The line that laser line light source is become on projection surface is laser rays, and the linearity of laser rays, width, line matter are its main indexes.

Linearity is the quantization means of the straight line laser degree of crook launched of laser line light source.

As depicted in figs. 1 and 2, the setting laser line source is perpendicular to the graticule receiving screen, and receiving screen is apart from the laser line light source O point 10m of place; Connect two critical point A and B (A, B are the parallel lines of nadir on the graticule receiving screen), on graticule, look for solstics C apart from straight line AB; Cross the C point and be the vertical line CD of AB straight-line segment; Export center " O " point of crossing light source connects C, D 2 points, and then ∠ COD representes the linearity of this graticule.

Laser rays can be crooked with form shown in Figure 1 in theory, but claim the S line again because wave shown in Figure 2 can appear in the problem laser rays of optical element, also can occur the jumping point of certain point as shown in Figure 3 sometimes.General measure adopts sampling or five point measurement methods at 3, can't react the linearity of laser rays more really, because wave and jumping point can make sample point become at random, adds many producers and adopts human eye observation that measurement is become more at random.

The general two big class methods that adopt of the detection that present laser line light source line is directly spent; 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 need measuring, the image of a plurality of measurement points is shown in face of the detection person through Video Segmentation device and display; Though intuitively but finally low through its precision of human eye judgement precision, personal error is big for this kind method.

Another kind of is to adopt line array CCD; Though precision is high, on the one hand the light-sensitive surface of line array CCD is less, adopts the mode of putting 3-5 sample point can't reflect truly that the line of laser rays directly spends situation on the other hand; And not directly perceived, make a lot of in the industry personages can't really accept this kind measuring method.

Along with development of technology; Having occurred such as publication number is CN102062579A; Name is called the utility application of " a kind of detection method and device thereof with line array CCD Laser Measurement bundle position and live width ", and this utility application discloses the method for utilizing line array CCD measuring laser beam position and live width.

Summary of the invention

The purpose of utility model be solve detection personal error that present laser line light source line directly spend big with can't make the really shortcoming of acceptance of insider.

For reaching above-mentioned purpose; Utility model provides a kind of comprehensive detection system of laser line light source; Its special character is; Comprise a word laser module, in order to the area array CCD module of the image that obtains measurement point, in order to the line array CCD module of the position of the laser rays that detects measurement point and live width, drive said word laser module rotation rotation platform and to the detected image of said area array CCD module show, to the PC that the data of said line array CCD module are handled, said area array CCD module and line array CCD module all are arranged on said measurement point.

Above-mentioned rotation platform is the vertical pivot system of electronic theodolite.

The advantage of utility model is: the not only width of detection laser line and linearity accurately; Effectively avoid the defective of the situation that personal error and sampling Detection can't the actual response laser rays, improved the precision that detects, and can the form of testing result with image have been represented to the people intuitively; Be easy to people's acceptance and popularization; And method is simple to operate, and system architecture simply is easy to realize, and is with low cost.

Description of drawings

Below will combine accompanying drawing that utility model is explained further details:

Fig. 1 is the crooked synoptic diagram of laser rays.

Fig. 2 is that laser rays is the synoptic diagram of wave.

Fig. 3 is the system schematic that realizes the method for comprehensive detection of laser line light source.

Fig. 4 is laser rays track synoptic diagram when being straight line.

Fig. 5 is that laser rays is the track synoptic diagram of S line.

Fig. 6 is the track synoptic diagram that the laser rays of jumping point is arranged.

Among the figure: 1, a word laser module; 2, area array CCD module; 3, line array CCD module.

Embodiment

Present embodiment solve detection personal error that present laser line light source line directly spends big with can't make the real shortcoming of accepting of insider; Present embodiment provides a kind of method for comprehensive detection of laser line light source, may further comprise the steps: 1) on the projection surface of this word laser module, divide this spread angle in 120 ° the scope equally and form the face territory that several edge angles equate;

2) get the edge in above-mentioned each face territory and the intersection point of the laser rays of a word laser module on projection surface; Mid point with the laser rays between the adjacent intersection point is a measurement point; And put area array CCD module and line array CCD module in this measurement point, with the image of the laser rays that obtains this measurement point and the position and the line width information of laser rays;

3) utilize rotation platform to make word laser module rotation, to realize detection to whole laser rays;

The position and the line width information of the laser rays of 4) measuring according to the line array CCD module of each measurement point of obtaining judge whether laser rays is on S curve or its whether jumping point to be arranged; If then finish detection, if not, then proceed to step 5) to laser rays;

5) according to the position and the line width information of the laser rays of each measurement point of obtaining; Whether the slope of geometric locus of judging each measurement point is consistent; If show that then this laser rays is straight line (as shown in Figure 4), then calculates the linearity value of this laser rays if not; And end is to the detection of laser rays; The computation process of the linearity value that here relates to is (combination Fig. 2): two limits of the projectional angle of line taking laser and the first intersection point A and second intersection points B of projection surface, and the line AB point C farthest apart from this first intersection point A and second intersection points B that crosses on the laser rays ACB then is the vertical line CD perpendicular to this line AB, must this vertical line CD and the intersection point D (intersection point) of this line AB; Then by the central point O of the center light hole of linear laser source and said farthest some C, the linearity value that angle ∠ COD that intersection point D forms is laser rays ACB; This ∠ COD=arctgCD/OD, wherein CD is the maximum position variable quantity of the laser rays of line array CCD module measurement, OD is a measuring distance.

Whether the laser rays in the step 4) is that the decision method of S curve is; Whether the position of the image of observing the laser rays that the area array CCD module of each measurement point the obtains laser rays whether be S curve or observation obtain according to the line array CCD module and the geometric locus that line width information is depicted are the S curve, and promptly whether this laser rays of decidable is the S curve.

Whether there is the judgment mode of jumping point to be on the laser rays in the step 4); The position of the laser rays that obtains according to the line array CCD module and the geometric locus majority that line width information is depicted are a straight path, show that then the jumping point is arranged on this laser rays if the geometric locus of this straight path occurs departing from.

Geometric locus in the step 5) is the position of the laser rays that obtains according to the line array CCD module and the geometric locus that line width information is depicted.

Judgement by jumping point, S line or linearity is not difficult to find out; Geometric locus in the said method; The curve that the positional information of the laser rays that in fact just obtains according to the line array CCD module is described to form; Each position that is about to the laser rays that the line array CCD module of each measurement point obtains is joined to one another and can obtains this curve; And when laser rays line width information that the line array CCD module of utilizing each measurement point is obtained, the curve of depicting then is the curve with certain width that can characterize laser rays width.

The position and the line width information of the laser rays that obtains according to the line array CCD module that relates in the present embodiment can utilize software to make computing machine depict the corresponding geometric locus of these information, more intuitively to reflect the situation of laser rays; Also can not need describe this geometric locus; Promptly through the method for some data analyses, whether the linearity of judgement laser rays is the S line or the jumping point is not arranged; Algorithm prior art about these is a lot; And present embodiment obviously is to have selected the position and the corresponding geometric locus of line width information of laser rays are described out through computing machine, and purpose is exactly in order to make testing result more be directly perceived and be prone to row, to be easy to insider's acceptance.

Simultaneously; The utility model provides a kind of system of method for comprehensive detection of the above-mentioned laser line light source of realization as shown in Figure 3; Comprise a word laser module 1, in order to the area array CCD module 2 of the image that obtains measurement point E, F, G, in order to the line array CCD module 3 of the position of the laser rays that detects measurement point E, F, G and live width with drive the rotation platform (not shown) of a word laser module 1 rotation; The PC that shows with detected image, the data of line array CCD module 3 are handled to area array CCD module 2; It is that each measurement point E, F, G place are provided with an area array CCD module 2 and line array CCD module 3 respectively that area array CCD module 2 and line array CCD module 3 all are arranged on measurement point E, F, G place; This measurement point E, F, G specifically obtain like this; Be the spread angle ∠ AOD of five equilibrium one word laser module 1, each sub-multiple angle (be that spread angle ∠ AOD has been divided into trisection among Fig. 1, each sub-multiple angle is 40 °) must intersect with the laser rays AD of word laser module 1 on projection surface; As shown in Figure 1; Intersection point is respectively B, C, D, gets laser rays AB, BC, the mid point E of CD, F, G between consecutive point A, B, C, the D then, with this E, F, G point as measurement point.

What the rotation platform in the present embodiment was selected for use is the vertical pivot system of electronic theodolite.Area array CCD module 2 is for realizing the camera of microshot, and the image of its shooting directly shows through PC, the operator can be observed more intuitively jump point or S line and the not straight situation of line, also lets the insider accept easily.Line array CCD module 3 has then been guaranteed the high precision that detects, rotation platform then through driving the rotation of laser module, has been realized the detection to whole laser rays, has effectively overcome the shortcoming of the situation that sampling Detection can't the actual response laser rays.

(is unit with the second), this ∠ COD=arctgCD/OD, wherein CD is the maximum position variable quantity of the maximum laser of line array CCD module measurement, OD is a measuring distance.

Line array CCD module utilization in the present embodiment be that publication number is CN102062579A; Name is called the device in the application for a patent for invention of " a kind of detection method and device thereof with line array CCD Laser Measurement bundle position and live width "; Promptly line array CCD is driven through programmable digital logic device or other electron device; Incide the position of line array CCD light-sensitive surface and the judgement of live width through measurement; Thereby obtain the photoelectric detection system of laser in the absolute position of CCD light-sensitive surface---be that the line array CCD module that relates in the present embodiment all adopts this device; This device has the RS485 communication interface, is connected with master control system, be connected with the RS485 communication of master control system can be wired also can be wireless connections (wireless connections promptly adopt wireless module to dock with the RS485 interface).

Master control system wherein: mainly accomplish the reception of PC order and to the control of CCD apparatus module, the transmission of data and the management of power supply.Master control system is through serial ports or USB mouth and PC communication.

PC: transmit the measurement data of CCD apparatus module through the lose one's life reception master control system of order of serial ports or USB oral instructions; And reflection laser position and the live width data of utilizing the application software transmission are carried out data analysis and trajectory analysis; And accomplish the functions such as preservation and printing of corresponding data, and laser line light source is done final decision.And the image of a plurality of (shown in Figure 3 is 3) the individual camera that directly demonstrates in the PC system makes the operator observe accent point or S line and the not straight situation of line more intuitively.Also let easily and accept in the industry.

More than giving an example only is to the illustrating of utility model, and does not constitute the restriction to the protection domain of utility model, everyly all belongs within the protection domain of utility model with the same or analogous design of utility model.

Claims

1. the comprehensive detection system of a laser line light source; It is characterized in that: comprise a word laser module, in order to the area array CCD module of the image that obtains measurement point, in order to the line array CCD module of the position of the laser rays that detects measurement point and live width, drive said word laser module rotation rotation platform and to the detected image of said area array CCD module show, to the PC that the data of said line array CCD module are handled, said area array CCD module and line array CCD module all are arranged on said measurement point.

2. the system of claim 1, it is characterized in that: said rotation platform is the vertical pivot system of electronic theodolite.