CN107479049B - Device and method for verifying monitoring precision of blind spot monitoring system - Google Patents
Device and method for verifying monitoring precision of blind spot monitoring system Download PDFInfo
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- CN107479049B CN107479049B CN201710914077.3A CN201710914077A CN107479049B CN 107479049 B CN107479049 B CN 107479049B CN 201710914077 A CN201710914077 A CN 201710914077A CN 107479049 B CN107479049 B CN 107479049B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012795 verification Methods 0.000 claims abstract description 44
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
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Abstract
The invention relates to the technical field of safe driving control, and discloses a device and a method for verifying the monitoring precision of a blind spot monitoring system. Meanwhile, the invention also discloses a method for verifying the blind spot monitoring system, and compared with the traditional verification method, the verification method is simple and accurate.
Description
Technical Field
The invention relates to the technical field of safe driving control, in particular to a device and a method for verifying monitoring precision of a blind spot monitoring system.
Background
In order to improve driving safety, a blind spot monitoring system (LWC) is currently loaded in many automobiles, the function uses a camera of a right rearview mirror to shoot a right rear image of the automobile and displays the right rear image on a screen of a center console, and in order to assist in judging a relative distance between an object in a blind spot area displayed in the screen and the automobile, three marked lines are arranged in the screen of the blind spot monitoring system: the first target line, the second target line and the third target line respectively mark the reference positions of the rear blind spot areas with the tail distances of L1, L2 and L3 (3.15 m, 11.2m and 24.0 m), and the blind area range of the right rearview mirror can be greatly reduced by installing the blind spot monitoring system on the vehicle, so that the original visible range of the right rearview mirror is improved to more than 100 degrees after the blind spot monitoring system is loaded. Before the vehicle is off line, the LWC needs to be verified and activated on a special post of the QA detection line, after the verification and activation are successful, the LWC function can be normally used, and three marked lines are displayed on a screen. The target line should meet a certain position accuracy requirement, and the process of verifying the blind spot monitoring system (LWC) is to verify the position accuracy of three target lines in a screen, namely, verify whether the deviation of the display distance and the actual distance of the target line is within an error allowable range.
The identification distances from the first target line, the second target line and the third target line to the tail of the vehicle to be verified are L1, L2 and L3 respectively, the position accuracy of the target line is verified, the actual position of the projection of the target line in the screen on the verification platform is required to be determined, then the actual distances L1', L2' and L3 'from the projection position on the verification platform to the tail of the vehicle to be verified are measured, the actual distances are compared with the identification distances L1-L1', L2-L2', L3-L3', and whether the deviation is within the error allowable range is judged, so that the monitoring accuracy of the blind spot monitoring system is verified. The verification process requires a large working space and is difficult to operate.
In order to reduce the working space for measurement, referring to fig. 3, a whiteboard is placed on the center line of the rear wheel, passes through the center point of the rear wheel and is perpendicular to the verification platform, and the mode of marking the projection position of the target line on the verification platform and measuring the distance is changed into a mode of marking the projection position of the target line on the whiteboard and measuring the height thereof. From the proportions of similar trianglesWherein L is the identification distance from the target line to the tail of the vehicle, firstly measuring the values of a and b, and then calculating the corresponding allowable range value of the standard value h through the allowable range value set by L on the design of the blind spot monitoring system; then, an actual value h ' is measured, the actual value h ' is compared with a standard value h, and whether the h ' is within an allowable range value of h is confirmed, namely whether the blind spot monitoring system meets the requirement of monitoring precision is verified.
As can be seen from the above description, referring to fig. 3, the key of the process of verifying the monitoring accuracy of the blind spot monitoring system is to determine the position of the H spot, and the current method for determining the position of the H spot is as follows:
1. hanging hammers at a headstock central point, a tailstock central point, a right rearview mirror camera central point and a right rear wheel central point of a vehicle to be verified respectively, and marking a headstock central point B, a tailstock central point C, a right rearview mirror camera central point A and a right rear wheel central point D which correspond to each other on a verification platform;
2. determining the BC length and the BA length through a vehicle bottom rope throwing device;
3. drawing an arc by taking A as a circle center BC as a radius, drawing an arc by taking C as a circle center BA as a radius, and connecting AJ by using a rope, wherein the intersection point of the two arcs is J;
4. and (3) making a straight line perpendicular to the AJ line through the center point C of the vehicle tail, and finally obtaining the corresponding drop foot H.
After the point H is determined, measuring the distance HA from the center point A of the right rearview mirror camera to the vertical point H by using a tape measure; the white board vertical to the verification platform is placed along the vertical center line of the right rear wheel, the intersection point F of the white board and the AJ is firstly made, and then the numerical value of the HF is measured by using a tape measure.
The current method for measuring the distance values of HA and HF mainly HAs the following defects:
1. the operation steps are complex, and the time consumption is long: the steps of rope throwing, arc drawing, intersection point solving and the like are needed through the bottom of the vehicle, and the operation steps are more, so that the time consumption is long and the error is easy to occur;
2. the auxiliary tools used are numerous and crude: the operation process needs to use scissors, paper, ropes and oily pen auxiliary tools, and the auxiliary tools are long in preparation time consumption and inconvenient to use, so that the operation of the verification process is troublesome.
The difficulty in measuring the distance between AH and AF results in difficulty in verifying the monitoring accuracy of the blind spot monitoring system, and a method for simply verifying the monitoring accuracy of the blind spot monitoring system is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and aims to provide a device which has a simple structure and can rapidly and accurately verify the detection precision of a blind spot monitoring system.
Accordingly, another technical problem to be solved by the invention is to provide a method for verifying the monitoring precision of the automobile blind spot monitoring system by using the device.
In order to achieve the above object, the present invention provides a device for verifying monitoring accuracy of a blind spot monitoring system, which comprises a base, wherein the base comprises a linear guide rail, and a first support and a second support which are respectively arranged at two ends of the linear guide rail, a right angle laser instrument for emitting two perpendicular and intersected laser beams is arranged on the first support, a sliding block capable of sliding along the linear guide rail is arranged on the linear guide rail, a reflector and a laser range finder are arranged on the sliding block, a plane formed by the two laser beams emitted by the right angle laser instrument is a horizontal plane, and an included angle between the reflector and the horizontal plane is 45 degrees.
As an optimal scheme, a first light guide plate is arranged on the linear guide rail between the right-angle laser instrument and the sliding block, and a first light passing slit is formed in the light guide plate.
As a preferable scheme, a second light guide plate is arranged on the linear guide rail between the first light guide plate and the right-angle laser instrument, a second light passing slit is formed in the second light guide plate, and the intersection point of the first light passing slit, the second light passing slit and the two laser beams is in a plane.
As a preferable scheme, the first support and the second support are rotatably connected with the linear guide rail, and the first support and the second support can rotate around the linear guide rail on a vertical plane.
Preferably, the first support comprises a first support body and a supporting part arranged at the bottom of the first support body, and the height of the supporting part is adjustable.
Preferably, the bottom of the first support body is provided with a threaded hole, and the supporting part is a screw connected with the threaded hole.
Preferably, the reflector mounting bracket is rotatably connected with the sliding block, and the reflector can rotate around the sliding block in a horizontal plane.
As a preferable scheme, the device for verifying the monitoring precision of the blind spot monitoring system further comprises a laser range finder mounting bracket for mounting the laser range finder and a reflector mounting bracket for mounting the reflector, wherein the laser range finder mounting bracket can rotate around the reflector mounting bracket in a horizontal plane.
The method for verifying the monitoring precision by using the blind spot monitoring system mainly comprises the following steps:
s1, hanging hammers at a headstock central point, a tailstock central point, a right rearview mirror camera central point and a right rear wheel central point of a vehicle to be verified respectively, and marking a headstock central point B, a tailstock central point C, a right rearview mirror camera central point A and a right rear wheel central point D which correspond to each other on a verification platform;
s2, placing a device for verifying the monitoring precision of the blind spot monitoring system on a verification platform, opening a right-angle laser instrument to enable the intersection point of two beams of vertical lasers to be aligned with a vehicle tail center point C, wherein one beam of lasers is aligned with a vehicle head center point B, and a linear guide rail is parallel to the other beam of lasers;
s3, moving the sliding block to ensure that laser parallel to the linear guide rail passes through the center point A of the right rearview mirror camera after being reflected by the reflecting mirror;
s4, opening the laser range finder to measure the distance between the laser range finder and the center point A of the right rearview mirror camera;
s5, placing a white board vertical to the verification platform along the vertical center line of the right rear wheel, and measuring the distance between the laser range finder and the white board by using the laser range finder;
s6, measuring the vertical height from the center point of the right rearview mirror camera to the verification platform;
s7, according to the distance L from the tail of the vehicle, which is marked by the target line in the screen of the blind spot monitoring system, and the set allowable range value L max ～L min The vertical height H from the projection position of the target line on the whiteboard to the verification platform is calculated by the distance a between the laser range finder and the whiteboard, the distance b between the laser range finder and the center point A of the right rearview mirror camera and the vertical height H from the center point of the right rearview mirror camera to the verification platform:and obtaining the allowable range value h from the projection position of the target line on the whiteboard to the set vertical height of the verification platform max ～h min ；
S8, measuring an actual vertical height value h' from the projection position of the target line on the white board to the verification platform according to the projection position of the target line on the white board in a screen of the blind spot monitoring system;
s9, when h max ≤h'≤h min When the blind spot monitoring system is used, the monitoring precision of the blind spot monitoring system is judgedAnd if not, judging that the monitoring precision of the blind spot monitoring system is not qualified.
The invention provides a device and a method for verifying the monitoring precision of a blind spot monitoring system, wherein the device for verifying the monitoring precision of the blind spot monitoring system comprises a linear guide rail, a first support and a second support, wherein the first support and the second support are respectively arranged at two ends of the linear guide rail, a right-angle laser instrument is arranged on the first support, a reflecting mirror and a laser range finder which can slide along the linear guide rail are arranged on the linear guide rail, and the monitoring precision of the blind spot monitoring system on an automobile can be simply and accurately verified by utilizing the right-angle laser instrument, the reflecting mirror and the laser range finder of the device.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of an apparatus for verifying the accuracy of a blind spot monitoring system in accordance with a preferred embodiment of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a process schematic of a method of verifying the accuracy of a blind spot monitoring system in a preferred embodiment of the invention;
fig. 4 is a top view of fig. 3.
In the figure, 10, a base; 11. a linear guide rail; 12. a first support; 121. a first support body; 122. a support part; 13. a second support; 20. a right angle laser instrument; 30. a slide block; 40. a reflecting mirror; 41. a mirror mounting bracket; 50. a laser range finder; 51. a laser range finder mounting bracket; 60. a first light guide plate; 61. a first light transmission slit; 70. a second light guide plate; 71. and a second light transmission slit.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
As shown in fig. 1 and 2, a device for verifying the monitoring accuracy of a blind spot monitoring system according to a preferred embodiment of the present invention includes a base 10, where the base 10 includes a linear guide rail 11, and a first support 12 and a second support 13 respectively disposed at two ends of the linear guide rail 11, a right angle laser 20 for emitting two vertical laser beams is disposed on the first support 12, a slider 30 capable of sliding along the linear guide rail 11 is disposed on the linear guide rail 11, a mirror 40 and a laser range finder 50 are mounted on the slider 30, the mirror 40 includes a mirror 40 and a mirror mounting bracket 41 for mounting the mirror 40, a plane formed by two vertical lasers emitted by the right angle laser 20 is a horizontal plane, the mirror 40 is perpendicular to the horizontal plane and has an included angle of 45 ° with the linear guide rail 11, by moving the mirror at the position of the linear guide rail 11, an H spot shown in fig. 3 can be first found, and finally a distance AH from the H spot to a center point a right rear view mirror a is measured by the laser range finder 50.
In order to ensure the uniqueness of the propagation path of the laser beam entering the reflecting mirror 40, a first light guide plate 60 is disposed on the linear guide rail 11 between the square laser 20 and the slider 30, the first light guide plate 60 includes a first light through slit 61, and a beam of laser beam emitted by the square laser 20 enters the reflecting mirror 40 after passing through the first light through slit 61.
Based on the above technical solution, in order to better ensure the uniqueness of the propagation path of the laser beam, a second light guide plate 70 is disposed on the linear guide rail 11 between the first light guide plate 60 and the right angle laser 20, the second light guide plate 70 includes a second light through slit 71, the first light through slit 61, the second light through slit 71 and the intersection point of the two laser beams are in a plane, and a laser beam emitted by the right angle laser 20 is injected into the reflecting mirror 40 after passing through the first light through slit 61 and the second light through slit 71.
Specifically, the first support 12 and the second support 13 are rotatably connected with the linear guide rail 11, and the first support 12 and the second support 13 can rotate around the linear guide rail 11 on a vertical plane, so that the relative position relationship between the first support 12 and the second support 13 can be adjusted to ensure that the first support 12, the linear guide rail 11 and the second support 13 keep relative levelness; by rotating the linear guide 11, the slider 30, the reflecting mirror 40 and the laser range finder 50 on the linear guide are driven to rotate together, and the levelness of the reflecting mirror 40 and the laser range finder 50 on the slider 30 is adjusted.
Preferably, the first support 12 includes a first support body and a supporting portion 122 disposed at the bottom of the first support body, the height of the supporting portion 122 is adjustable, and the levelness of the first support 12 can be further adjusted by adjusting the height of the supporting portion 122, so as to adjust the levelness of the right angle laser 20 disposed on the first support 12.
Preferably, the above-mentioned supporting parts 122 comprise at least three supporting parts 122, and the at least three supporting parts 122 can determine the plane where the bottom of the first support 12 contacts the verification platform, and thus determine the levelness of the first support 12.
Illustratively, the bottom of the first support body 121 of the first support 12 is uniformly provided with four support portions 122.
Preferably, a threaded hole is formed in the bottom of the first support body 121, the supporting portion 122 is a screw connected to the threaded hole, and the height of the supporting portion 122 can be finely adjusted by rotating the screw.
Preferably, in this embodiment, in order to flexibly adjust the relative positional relationship between the laser rangefinder 50 and the mirror 40, the mirror 40 is rotatably connected to the slider 30, and the mirror 40 can rotate around the slider 30 in a horizontal plane, so as to ensure that the angular accuracy of the laser beam reflected by the mirror 40 is adjustable.
In this embodiment, the laser range finder mounting bracket 51 is further provided with the laser range finder 50, the laser range finder mounting bracket 51 is rotatably connected with the reflector mounting bracket 41, the laser range finder mounting bracket 51 can rotate around the reflector mounting bracket 41 in a horizontal plane, the position relationship between the laser range finder 50 and the reflector 41 can be adjusted by rotating the laser range finder mounting bracket 51, the relative angle between the reflected laser beam reflected from the reflector 40 and the laser beam emitted by the laser range finder 50 can be adjusted, and the two laser beams can be ensured to be in the same vertical plane by adjusting the relative angle, so that the ranging accuracy can be ensured.
As shown in fig. 3 and 4, the present embodiment further provides a method for verifying the monitoring accuracy of the blind spot monitoring system, which includes the following steps:
s1, hanging hammers at a headstock central point, a tailstock central point, a right rearview mirror camera central point and a right rear wheel central point of a vehicle to be verified respectively, and marking a headstock central point B, a tailstock central point C, a right rearview mirror camera central point A and a right rear wheel central point D which correspond to each other on a verification platform;
s2, placing a device for verifying the monitoring precision of the blind spot monitoring system on a verification platform, opening a right-angle laser instrument to enable the intersection point of two beams of vertical lasers to be aligned with a vehicle tail center point C, wherein one beam of lasers is aligned with a vehicle head center point B, and a linear guide rail is parallel to the other beam of lasers;
s3, moving the sliding block to ensure that laser parallel to the linear guide rail passes through the center point A of the right rearview mirror camera after being reflected by the reflecting mirror;
s4, opening the laser range finder to measure the distance between the laser range finder and the center point A of the right rearview mirror camera;
s5, placing a white board vertical to the verification platform along the vertical center line of the right rear wheel, and measuring the distance between the laser range finder and the white board by using the laser range finder;
s6, measuring the vertical height from the center point of the right rearview mirror camera to the verification platform;
s7, according to the distance L from the tail of the vehicle, which is marked by the target line in the screen of the blind spot monitoring system, and the set allowable range value L max ～L min The vertical height H from the projection position of the target line on the whiteboard to the verification platform is calculated by the distance a between the laser range finder and the whiteboard, the distance b between the laser range finder and the center point A of the right rearview mirror camera and the vertical height H from the center point of the right rearview mirror camera to the verification platform:and obtaining the allowable range value h from the projection position of the target line on the whiteboard to the set vertical height of the verification platform max ～h min ；
S8, measuring an actual vertical height value h' from the projection position of the target line on the white board to the verification platform according to the projection position of the target line on the white board in a screen of the blind spot monitoring system;
s9, judging whether h' is in the allowable range value h max ～h min In order to verify whether the monitoring precision of the blind spot monitoring system is qualified: when h max ≤h'≤h min And judging that the monitoring precision of the blind spot monitoring system is qualified, and if not, judging that the monitoring precision of the blind spot monitoring system is unqualified.
In the above process, when the projection position of the target line on the whiteboard in the screen of the blind spot monitoring system is marked, one person needs to look at the screen in the vehicle, instruct another person outside the vehicle to mark the position of the target line seen through the screen on the floor, and then measure the actual vertical height h' from the projection position of the target line on the whiteboard to the verification platform according to the marked position.
By using the device for verifying the monitoring precision of the blind spot monitoring system, firstly, the position of the right-angle laser 20 on the verification platform is determined, then the position of the sliding block 30 is adjusted to find the H point, finally, the laser range finder 50 is opened to accurately measure the center point A of the laser range finder and the right rearview mirror camera, and then the distance between the laser range finder and the white board can be measured by placing the center point of the wheel on the white board perpendicular to the verification platform; then, the vertical height from the center point of the right rearview mirror camera to the verification platform is measured, and an error allowable range value from the projection position of the target line on the whiteboard to the vertical height of the verification platform can be calculated according to the measured data; and finally, measuring the actual vertical height value from the projection position of the target line on the whiteboard to the verification platform, and comparing the error allowable range value of the actual vertical height value and the vertical height, so as to verify whether the blind spot monitoring system meets the monitoring precision requirement.
In summary, the embodiment of the invention provides a device for verifying the monitoring precision of a blind spot monitoring system, which comprises a linear guide rail 11, and a first support 12 and a second support 13 respectively arranged at two ends of the linear guide rail 11, wherein a right angle laser 20 for emitting two vertical laser beams is arranged on the first support 12, a reflecting mirror 40 and a laser range finder 50 which can slide along the linear guide rail 11 are arranged on the linear guide rail 11, and the distance of AH shown in fig. 3 can be accurately measured by adjusting the position relationship among the right angle laser 20, the reflecting mirror 40 and the laser range finder 50, so that the monitoring precision of the blind spot monitoring system of an automobile is verified. Meanwhile, the invention also provides a method for verifying the blind spot monitoring system, which is simple and accurate compared with the traditional verification method.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (8)
1. The verification method is characterized by utilizing a device for verifying the monitoring precision of the blind spot monitoring system;
the device for verifying the monitoring precision of the blind spot monitoring system comprises a base, wherein the base comprises a linear guide rail, a first support and a second support which are respectively arranged at two ends of the linear guide rail, a right-angle laser instrument for emitting two mutually perpendicular and intersected laser beams is arranged on the first support, a sliding block capable of sliding along the linear guide rail is arranged on the linear guide rail, a reflecting mirror and a laser range finder are arranged on the sliding block,
the plane formed by two laser beams emitted by the right-angle laser instrument is a horizontal plane, and the reflecting mirror is vertical to the horizontal plane and forms an included angle of 45 degrees with the linear guide rail;
the method comprises the following steps:
s1, hanging hammers at a headstock central point, a tailstock central point, a right rearview mirror camera central point and a right rear wheel central point of a vehicle to be verified respectively, and marking a headstock central point B, a tailstock central point C, a right rearview mirror camera central point A and a right rear wheel central point D which correspond to each other on a verification platform;
s2, placing a device for verifying the monitoring precision of the blind spot monitoring system on a verification platform, opening a right-angle laser instrument to enable the intersection point of two beams of vertical lasers to be aligned with a vehicle tail center point C, wherein one beam of lasers is aligned with a vehicle head center point B, and a linear guide rail is parallel to the other beam of lasers;
s3, moving the sliding block to ensure that laser parallel to the linear guide rail passes through the center point A of the right rearview mirror camera after being reflected by the reflecting mirror;
s4, opening the laser range finder to measure the distance between the laser range finder and the center point A of the right rearview mirror camera;
s5, placing a white board vertical to the verification platform along the vertical center line of the right rear wheel, and measuring the distance between the laser range finder and the white board by using the laser range finder;
s6, measuring the vertical height from the center point of the right rearview mirror camera to the verification platform;
s7, according to the distance L from the tail of the vehicle, which is marked by the target line in the screen of the blind spot monitoring system, and the set allowable range value L max ~L min The method comprises the steps of calculating the set vertical height H from the projection position of a target line on the whiteboard to the verification platform, wherein the set vertical height H is calculated from the distance a between the laser range finder and the whiteboard, the distance b between the laser range finder and the center point A of the right rearview mirror camera and the vertical height H from the center point of the right rearview mirror camera to the verification platform:and obtain the allowable range value h of the projection position of the target line on the whiteboard to the set vertical height of the verification platform max ~h min ；
S8, measuring an actual vertical height value h' from the projection position of the target line on the white board to the verification platform according to the projection position of the target line on the white board in a screen of the blind spot monitoring system;
s9, when h max ≤h'≤h min And judging that the monitoring precision of the blind spot monitoring system is qualified, and if not, judging that the monitoring precision of the blind spot monitoring system is unqualified.
2. The method of claim 1, wherein a first light guide plate is disposed on a linear guide rail between the right angle laser and the slider, and a first light passing slit is disposed on the light guide plate.
3. The method of claim 2, wherein a second light guide plate is disposed on a linear guide rail between the first light guide plate and the right angle laser, a second light passing slit is disposed on the second light guide plate, and the first light passing slit, the second light passing slit and an intersection point of the two laser beams are in a plane.
4. A method of validating as defined in claim 3, wherein the first support and the second support are each rotatable about the linear guide in a vertical plane.
5. The authentication method of claim 4, wherein the first holder includes a first holder body and a support portion provided at a bottom of the first holder body, a height of the support portion being adjustable.
6. The method of verifying of claim 5, wherein the bottom of the first holder body is provided with a threaded hole, and the support is a screw coupled to the threaded hole.
7. A method of authenticating as claimed in claim 3 wherein the mirror is rotatable about the slider in a horizontal plane.
8. The authentication method of claim 7 further comprising a laser rangefinder mounting bracket for mounting a laser rangefinder and a mirror mounting bracket for mounting the mirror, the laser rangefinder mounting bracket being rotatable in a horizontal plane about the mirror mounting bracket.
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| CN109945790B (en) * | 2017-12-21 | 2020-09-01 | 中国科学院长春光学精密机械与物理研究所 | Optical method for establishing characteristic points for large vertical object |
| CN109990734B (en) * | 2018-01-03 | 2021-07-13 | 浙江舜宇智能光学技术有限公司 | Automatic detection system and method for precision of depth information camera module |
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