CN117073583A - Measuring device for measuring maximum width of turning channel - Google Patents
Measuring device for measuring maximum width of turning channel Download PDFInfo
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- CN117073583A CN117073583A CN202311023128.5A CN202311023128A CN117073583A CN 117073583 A CN117073583 A CN 117073583A CN 202311023128 A CN202311023128 A CN 202311023128A CN 117073583 A CN117073583 A CN 117073583A
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- 238000012360 testing method Methods 0.000 claims abstract description 145
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims description 12
- 238000011160 research Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003708 edge detection Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/255—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring radius of curvature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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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
- G01S17/08—Systems determining position data of a target for measuring distance only
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- Computer Networks & Wireless Communication (AREA)
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- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The application belongs to the field of whole vehicle test research, and particularly relates to a measuring device for measuring the maximum width of a turning channel, which comprises a functional rod assembly, a laser radar assembly and a display panel; the function lever assembly comprises a first function lever and a second function lever; the first functional rod is fixed at the front end of the test vehicle and is positioned right above an outer loop line of the test road, and the second functional rod is fixed at the center of a rear axle or a rear axle group of the test vehicle and is arranged in a diagonal direction with the first functional rod; the laser radar component is placed at the center of the arc section of the test road; the display panel is located in the cab of the test vehicle and is in communication connection with the first and second function levers and the lidar assembly. The application can accurately measure the maximum width of the turning channel of the vehicle, ensure that the deviation between the wheel track of the front and outer steering wheels of the test vehicle and the outer loop line of the test road is less than 50mm in the test process, ensure the safety of the test process without extending the head of the driver out of the cab in the whole process.
Description
Technical Field
The application belongs to the field of whole vehicle test research, and particularly relates to a measuring device for measuring the maximum width of a turning channel.
Background
The vehicle passing test is used for verifying the capability of the vehicle to pass through various bad roads and road-free zones and overcome various obstacles, wherein the vehicle curve passing test is used for verifying whether the vehicle can pass through a curve road section by measuring the maximum width of a curve passage when the vehicle turns according to a prescribed route. The vehicle curve passing test requirement is specified in QC/T912-2013: 1. the test road should be a flat, dry, clean, unobstructed paved surface, and the coefficient of friction of the contact surface of the tire and the road should be no greater than 0.80.2. The route prescribed by the test consists of three parts: the straight line driving-in road section, a 90-degree arc road section with the radius of 12.5m and a straight line driving-out road section are tangent to the arc at the intersection point of the two straight line road sections and the arc road section. 3. The vertical projection of the outside automobile body on the bottom surface is recorded as a reference line for measuring the backward swing value, the speed of the experimental automobile is not more than 5km/h, the front and outer steering wheel tires of the automobile are ensured to be consistent with a specified route on the ground in the processes of entering, turning and exiting, and the track deviation is not more than 50mm.
The prior measuring of the maximum width of the turning channel usually adopts a water dripping method, a marking rod is arranged at the front end of the left side of the vehicle, a water dripping rod is arranged at the center of a rear axle (group) on the right side of the vehicle, the vehicle speed is monitored by a road instrument on the vehicle, the marking rod is always parallel to the maximum width of the left side of the vehicle, the marking rod is ensured to coincide with a running track as much as possible, the water dripping rod on the right side of the vehicle is manually operated to add water, the total water of the water dripping rod falls down to form the water dripping track, and after the vehicle completely leaves a place, a tape measure is used for measuring the distance from the midpoint of an arc to the water dripping track, namely the measured maximum width of the turning channel. The dripping method has the following problems: 1. in the test process, a driver needs to control the vehicle speed and monitor whether the marking rod coincides with the road track or not, the operation level requirement on the driver is extremely high, the fact that the reference point of the front and outer steering wheel tires of the vehicle on the ground is consistent with a specified route in the driving-in, turning and driving-out processes can be effectively guaranteed, track deviation is not more than 50mm, multiple tests are needed if the deviation occurs, the driver is tired in operation, and meanwhile, the head of the driver needs to stretch out of a cab in the whole process, and a certain risk is provided. 2. The test needs many people to cooperate, and the pole department of dripping needs to have the tester to be responsible for adding liquid, has the tester fixed tape measure origin when measuring, still needs a tester to carry out dynamic measurement. 3. The track formed by dripping water is easy to volatilize in summer and summer under the influence of external environment, and multiple measurements are needed; in winter, the influence of wind speed is larger than theoretical deviation of the water drop track, so that the measurement accuracy is influenced, and the final measurement result has low accuracy.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides a novel measuring device for measuring the maximum width of a turning channel, which can accurately control the deviation between the wheel track of the front and outer steering wheel and the outer loop line of a test road in the process of entering, turning and exiting of a test vehicle, and ensures the safety of the test process without extending the head of a driver out of a cab in the whole process.
In order to achieve the above purpose, the technical scheme adopted by the application provides a measuring device for measuring the maximum width of a turning channel, the measuring device is arranged in a test site, the test site comprises a test vehicle and a test road, the test road is a straight-line entering road section, a 90-degree arc road section with the radius of 12.5m and a straight-line exiting road section, the intersection points of the two straight-line road sections and the arc road section are tangent to an arc respectively, and the measuring device comprises a functional rod assembly, a laser radar assembly and a display panel;
the function lever assembly comprises a first function lever and a second function lever; when the test vehicle runs clockwise along the test road, the first functional rod is fixed at the front end of the left side of the test vehicle, and the second functional rod is fixed at the center of the rear axle or the rear axle group on the right side of the test vehicle; when the test vehicle runs anticlockwise along a test road, the first functional rod is fixed at the front end of the right side of the test vehicle, and the second functional rod is fixed at the center of a rear axle or a rear axle group on the left side of the test vehicle;
a laser camera is installed at the bottom of the first functional rod, and a laser radar is installed at the bottom of the second functional rod; the laser radar component is arranged at the center of the arc section of the test road; the display panel is positioned in a cab of the test vehicle and is in communication connection with the first functional lever and the second functional lever.
Further, the laser radar component is used for measuring the vertical height information of the laser emergent point from the circle center of the arc section of the test road and sending the vertical height information to the second functional rod.
Further, the bottoms of the first functional rod and the second functional rod are both at a predetermined height from the ground; the first functional rod is used for collecting the driving track information of the wheels along the outer ring line of the test road and feeding back the driving track information to the display panel; the second functional rod is used for collecting the height from the ground, receiving signals transmitted by the laser radar component and feeding the signals back to the display panel.
Further, the formula of the maximum width D of the turning channel measured by the measuring device is as follows:
D＝12.5-H min
wherein: h min For the projection distance from the exit point of the laser radar component to the laser line of the second functional rod, S is the measurement distance from the laser radar component to the laser radar of the second functional rod, h1 is the vertical distance from the exit point of the laser radar component to the circle center of the circular arc section of the test road, and h2 is the laser radar of the second functional rodThe vertical distance from the exit point of (2) to the ground of the test road;
further, during road test, the second functional rod and the laser radar component record a plurality of groups of values S, h and h1 based on the acquisition frequency according to the formulaAnd calculating the projection distance from the emergent point of the laser radar component to the laser line of the second functional rod, and calculating the maximum width D of the turning channel measured by the measuring device based on the minimum distance from the emergent point of the laser radar component to the projection of the laser line of the second functional rod.
Further, the laser beam emitted by the laser camera of the first functional rod is perpendicular to the tread center line of the wheel, and the laser beam emitted by the laser radar of the second functional rod is perpendicular to the ground, is positioned at the wheelbase center of the right two rear wheels of the test vehicle and is positioned on the outer side line of the right wheel running track.
Further, the display panel comprises a GPS and a controller, wherein the GPS and the controller are positioned inside the display panel; the GPS is used for acquiring the speed of the test vehicle in real time and displaying the speed on a screen of the display panel through the display panel; the controller analyzes and processes and displays on a screen of the display panel based on information received from the first function lever and the second function lever.
Further, during road test, the laser beam emitted by the laser camera of the first functional rod is perpendicular to the central line of the tread of the wheel, and the collected image information is fed back to the display panel, so that a driver can control the laser beam to fall in the outer loop line of the test road with the designed width by observing the display panel.
Further, the first functional lever and the second functional lever each comprise a lever body and a base, the lever bodies of the first functional lever and the second functional lever are respectively connected with the respective bases and are perpendicular to the ground, and the bases of the first functional lever and the second functional lever are respectively fixed and firm with the test vehicle.
The beneficial effects of the application are as follows:
the first functional lever and the second functional lever of the functional lever component are fixed at the front end of the left side or the right side of the test vehicle according to the running direction of the test vehicle, namely, the front end is positioned right above the outer loop line of the test road, the second functional lever is fixed at the center position of the axle distance of two rear wheels of the test vehicle and is in a diagonal direction with the first functional lever, the laser camera is arranged at the bottom of the first functional lever, the laser radar component is arranged at the center position of the arc section of the test road, signals can be transmitted to the second functional lever through the laser radar component, the tire of the test vehicle runs on the outer loop line of the test road, the wheel tread is rolled to cover the wheel track of the test road, the laser beams emitted by the laser camera are perpendicular to the center line of the wheel tread of the test road, the collected image information is fed back to the display panel, a driver is controlled to fall in the outer loop line of the test road with a certain width through observing the display panel in a driver's cab, the driver can accurately control the turning and steering, the driver can run out of the test road and the test road in the whole process of the test road is not required to have a certain deviation from the driver's wheel track, and the driver is required to run out of the test road is 50mm, and the driver is required to run out of the test road is ensured in the whole process of the safety is safe;
secondly, in a preferred implementation mode, the laser radar component can send signals to the laser radar of the second functional rod to perform distance measurement, can realize accurate measurement, and solves the problems that the existing dripping measurement is influenced by external environment, the dripping is easy to volatilize in summer and the water drop track has larger theoretical deviation compared with the wind speed;
third, in a preferred implementation manner, the maximum width calculation formula of the turning channel is obtained according to the space coordinates and Pythagorean theorem, and d=12.5-H min ，H min The projection distance from the emergent point of the laser radar component to the laser line of the second functional rod is S, and the measurement distance between the laser radar component and the laser radar of the second functional rod is SH1 is the vertical distance from the emergent point of the second laser radar to the circle center of the circular arc section of the test road, h2 is the vertical distance from the emergent point of the first laser radar to the ground of the test road, and the calculation method is simple and high in accuracy;
fourth, in a preferred implementation manner, the first functional rod of the present application adopts a telescopic rod, and the telescopic structure of the first functional rod can adjust the ground clearance height, so that the visual range of the laser camera can be ensured to cover the ground track, and the light emitted by the laser probe is presented in the display panel.
Drawings
FIG. 1 is a schematic view of the arrangement of a measuring device of the present application for measuring the maximum width of a turning channel;
FIG. 2 is a top view of the functional rod assembly of the present application disposed on a test vehicle;
FIG. 3 is a side view of the functional rod assembly of the present application disposed on a test vehicle;
FIG. 4 is a schematic view of the left wheel of the present application traveling along the outer loop of the test road;
FIG. 5 is a side view of the lidar assembly of the present application disposed on a level ground;
fig. 6 is a schematic diagram of the positional relationship of the lidar assembly and the second function lever of the present application.
Wherein, 1-the function lever assembly; 10-a first function lever; 100-laser beam; 11-a second function lever; a 2-lidar assembly; 20-a second lidar; 21-a mounting part; a, testing a road; a1-an arc section; a2-an outer loop line of the test road; b-test vehicle; b1-rear axle; b2-left tread; b20-wheel tread centerline.
Detailed Description
In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be further described in detail with reference to the accompanying drawings and examples.
The terms of directions such as up, down, left, right, front and rear in the present document are established based on the positional relationship shown in the drawings. The drawings are different, and the corresponding positional relationship may be changed, so that the scope of protection cannot be understood.
In the present application, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected or detachably connected, integrally connected or mechanically connected, electrically connected or communicable with each other, directly connected or indirectly connected through an intermediate medium, or communicated between two components, or an interaction relationship between two components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The application discloses a measuring device for measuring the maximum width of a turning channel, and the measuring device is used for measuring the maximum width of the turning channel based on a test road and a test vehicle. The test road comprises a straight-line entering road section, a 90-degree arc road section with the radius of 12.5m and a straight-line exiting road section, and the intersection points of the two straight-line road sections and the arc road section are tangent to the arc. The measuring device for measuring the maximum width of the turning channel is arranged on the test vehicle, and the test vehicle respectively runs clockwise and anticlockwise along the test road to measure the maximum width of the turning channel during road test.
As shown in fig. 1, the measuring device for measuring the maximum width of the turning channel of the present application comprises a function lever assembly 1, a laser radar assembly 2 and a display panel. The functional rod assemblies 1 are provided with two different structures, when the test vehicle runs clockwise along a test road, one functional rod is fixed at the front end of the left side of the test vehicle, and the other functional rod is fixed at the center of a rear axle or a rear axle group on the right side of the test vehicle; when the test vehicle runs along the test road mud hour hand, the functional rod fixed at the left front end of the test vehicle is adjusted and installed at the right front end of the test vehicle, and the functional rod fixed at the center position of the wheel base of the two rear wheels at the right side of the test vehicle is adjusted and installed at the center of the rear axle or the rear axle group at the left side of the test vehicle.
The bottoms of the two functional rod assemblies 1 are all at a preset height from the ground, and the two functional rod assemblies 1 are respectively in communication connection with the display panel through signal wires. The laser radar component 2 is arranged at the center position of the arc section A1 of the test road A, and the laser radar component 2 is used for transmitting signals to the functional rod component 1 positioned at the center of the wheelbase of the two rear wheels of the test vehicle B.
The functional rod assembly 1 is arranged at the front end of the test vehicle B and is used for collecting the running track of the wheels along the outer loop line of the test road A and feeding back the collected information to the display panel; the functional rod assembly 1 installed in the center of the wheelbase of the two rear wheels of the test vehicle B is used for collecting the height from the ground and receiving the signal emitted by the laser radar assembly 2, and feeding back the collected height information and the signal of the laser radar assembly 2 to the display panel.
The display panel is internally provided with a GPS and a controller. The GPS is used for acquiring the speed of the test vehicle B in real time and displaying speed information on a screen of the display panel; the controller is used for receiving information from the two function rod assemblies 1, analyzing, processing and displaying the information on a screen of the display panel.
The following describes a measuring device for measuring the maximum width of a turning passage, taking a test vehicle running clockwise along a test road as an example.
As shown in fig. 2, 3 and 4, the function lever assembly 1 includes a first function lever 10 and a second function lever 11. The first functional lever 10 is vertically fixed at the left front end of the test vehicle B, and the second functional lever 11 is vertically fixed at the center of wheelbase of the right two rear wheels of the test vehicle B. Taking the state shown in fig. 2 as an example, the test vehicle B is a heavy truck of a driving type 8×4, the first functional lever 10 is vertically fixed to the front end of the left side of the test vehicle B, and the second functional lever 11 is vertically fixed in the middle of the rear wheel axle group of the right side of the test vehicle B.
The first functional rod 10 and the second functional rod 11 comprise a rod body and a base, the rod bodies of the first functional rod 10 and the second functional rod 11 are respectively connected with the respective base and are perpendicular to the ground, and the base is firmly fixed with the test vehicle B by adopting a buckle type or magnetic attraction type.
The laser camera is installed to the shaft bottom of first function pole 10, and the laser camera passes through signal line and display panel's controller communication connection. The laser camera of the first installed functional rod 10 is matched with the tread center line B20 of the wheel on the left side of the test vehicle B. During road test, the left tire of the test vehicle B runs on the test road outer loop line A2, the left tire tread B2 rolls to cover the test road outer loop line A2 to form a wheel track, the laser beam 100 emitted by the laser camera is perpendicular to the center line B20 of the tire tread and feeds back collected image information to the display panel, a driver in a cab observes the display panel to control the laser beam 100 to fall in the test road outer loop line A2 with a certain width, and the deviation between the wheel track of the front and outer steering wheels and the test road outer loop line A2 in the driving-in, turning and driving-out processes of the test vehicle B can be accurately controlled to be smaller than 50mm.
In one embodiment, the first functional rod 10 is a telescopic rod, which may be an electric telescopic rod, the housing of the telescopic rod is fixed on the base, the push rod of the telescopic rod faces the ground vertically, and the bottom of the push rod of the telescopic rod is fixedly provided with a laser camera and a laser radar respectively. The telescopic structure of the first functional rod 10 can ensure that the visual range of the laser camera covers the ground track, so that the light emitted by the laser probe appears in the display panel.
In one embodiment, a lane line detection and identification program is arranged in the display panel, the laser camera of the first functional lever 10 transmits each acquired frame of ground image to the display panel, the lane line detection and identification program in the display panel carries out image preprocessing, including gray scale processing, canny edge detection and ROI region of interest extraction, a width critical line of the test lane outer ring line A2 is determined according to the width of the image acquisition test lane outer ring line A2, a theoretical track line of a driving track is determined according to the center of the width critical line of the test lane outer ring line A2, 50mm critical lines relative to two sides of the theoretical track line are further determined, and the lane line detection and identification program can synchronously display the theoretical track line, the 50mm critical line and the laser beam 100 on a screen of the display panel based on a space geometric relationship.
The first laser radar is installed at the bottom of the second functional lever 11, and the laser beam emitted by the first laser radar perpendicular to the ground is located at the center of the wheelbase of the right two rear wheels of the test vehicle B and on the outer side line of the right wheel running track. The first lidar is used to measure the height from the ground and to receive information from the lidar assembly 2.
As shown in fig. 5, the lidar assembly 2 includes a second lidar 20 and a mounting portion 21. The second laser radar 20 is fixed at the top of the mounting part 21, the mounting part 21 is fixed at the center position of the arc section A1 of the test road A, and the position of the emergent point of the second laser radar 20 is matched with the center position of the arc section A1 of the test road A. The second lidar 20 is used for detecting the height from the center of the circular arc section A1 of the test road a, and transmitting laser light and detected height information to the first lidar of the second functional lever 11.
As shown in fig. 6, according to the space coordinates and the pythagorean theorem, the formula of the maximum width D of the turning channel measured by the measuring device for measuring the maximum width of the turning channel is as follows:
D＝12.5-H min
wherein: 12.5 is the radius of the test road, H min Is the projected distance of the exit point of the second lidar 20 to the second function lever laser line.
Wherein S is the measurement distance from the second laser radar 20 to the first laser radar, h1 is the vertical distance from the exit point of the second laser radar 20 to the center of the arc section A1 of the test road A, and h2 is the vertical distance from the exit point of the first laser radar to the ground of the test road A.
It should be noted that, in the road test, the second functional rod 11 and the second laser radar 20 record a plurality of sets of values S, h, h1 based on the acquisition frequency, and in this embodiment, the acquisition frequency of the second functional rod 11 and the second laser radar 20 is 10hz, that is, a set of data is acquired every 0.1 s; according to the formulaCalculating the exit point of the second lidar 20 to the second function lever11, and calculating the maximum width D of the turning channel measured by the measuring device based on the minimum projection distance of the laser line from the exit point of the second laser radar 20 to the laser line of the second function lever 11.
The foregoing is merely exemplary embodiments of the present application, and specific structures and features that are well known in the art are not described in detail herein. It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The measuring device is arranged in a test site, the test site comprises a test vehicle and a test road, the test road is a straight-line entering road section, a 90-degree arc road section with the radius of 12.5m and a straight-line exiting road section, and the intersection points of the two straight-line road sections and the arc road section are tangent to an arc, and the measuring device is characterized by comprising a functional rod assembly (1), a laser radar assembly (2) and a display panel;
the function lever assembly (1) comprises a first function lever and a second function lever; when the test vehicle runs clockwise along the test road, the first functional rod is fixed at the front end of the left side of the test vehicle, and the second functional rod is fixed at the center of the rear axle or the rear axle group on the right side of the test vehicle; when the test vehicle runs anticlockwise along a test road, the first functional rod is fixed at the front end of the right side of the test vehicle, and the second functional rod is fixed at the center of a rear axle or a rear axle group on the left side of the test vehicle;
a laser camera is installed at the bottom of the first functional rod, and a laser radar is installed at the bottom of the second functional rod; the laser radar component (2) is arranged at the center of the arc section of the test road; the display panel is positioned in a cab of the test vehicle and is in communication connection with the first functional lever and the second functional lever.
2. The measuring device for measuring the maximum width of the turning channel according to claim 1, wherein the laser radar component (2) is used for measuring the vertical height information of the laser emergent point from the circle center of the circular arc section of the test road and sending the vertical height information to the second functional rod.
3. The measuring device for maximum width of a turn tunnel according to claim 1, wherein the bottoms of the first and second function levers each have a predetermined height from the ground; the first functional rod is used for collecting the driving track information of the wheels along the outer ring line of the test road and feeding back the driving track information to the display panel; the second functional rod is used for collecting the height from the ground, receiving signals emitted by the laser radar component (2) and feeding the signals back to the display panel.
4. The device for measuring the maximum width of a turning channel according to claim 1, wherein the formula of the maximum width D of the turning channel measured by the measuring device is as follows:
D＝12.5-H min
wherein: h min The projection distance from the exit point of the laser radar component (2) to the laser line of the second functional rod is S, the measurement distance from the laser radar component (2) to the laser radar of the second functional rod is h1, the vertical distance from the exit point of the laser radar component (2) to the circle center of the circular arc section of the test road is h2, and the vertical distance from the exit point of the laser radar of the second functional rod to the ground of the test road is h 2.
5. The measuring device for maximum width of a turning channel according to claim 4, wherein the second function lever and the lidar assembly (2) record a plurality of sets of values S, h, h1 based on the acquisition frequency during a road test according to the formulaAnd calculating the projection distance from the emergent point of the laser radar component (2) to the laser line of the second functional rod, and calculating the maximum width D of the turning channel measured by the measuring device based on the minimum distance from the emergent point of the laser radar component (2) to the projection of the laser line of the second functional rod.
6. The measuring device for measuring the maximum width of the turning channel according to claim 1, wherein the laser beam emitted by the laser camera of the first functional lever is perpendicular to the tread center line of the wheel, and the laser beam emitted by the laser radar of the second functional lever is perpendicular to the ground, is positioned at the center of the wheelbase of the right two rear wheels of the test vehicle, and is positioned on the outer side line of the running track of the right wheel.
7. The measurement device for measuring a maximum width of a turning channel of claim 1, wherein the display panel comprises a GPS and a controller, the GPS and the controller being located inside the display panel; the GPS is used for acquiring the speed of the test vehicle in real time and displaying the speed on a screen of the display panel through the display panel; the controller analyzes and processes and displays on a screen of the display panel based on information received from the first function lever and the second function lever.
8. The measuring device for maximum width of turning channel according to claim 3, wherein the laser beam emitted from the laser camera of the first functional lever is perpendicular to the center line of the tread of the wheel during road test, and the collected image information is fed back to the display panel, and the driver controls the laser beam to fall in the outer loop of the test road with the designed width by observing the display panel.
9. The measuring device for maximum width of a turning channel according to claim 1, wherein the first and second function levers each comprise a lever body and a base, the lever bodies of the first and second function levers are respectively connected with the respective bases and are perpendicular to the ground, and the bases of the first and second function levers are respectively fixed with a test vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311023128.5A CN117073583B (en) | 2023-08-15 | 2023-08-15 | Measuring device for measuring maximum width of turning channel |
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| CN202311023128.5A CN117073583B (en) | 2023-08-15 | 2023-08-15 | Measuring device for measuring maximum width of turning channel |
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| CN117073583A true CN117073583A (en) | 2023-11-17 |
| CN117073583B CN117073583B (en) | 2024-07-02 |
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| CN202311023128.5A Active CN117073583B (en) | 2023-08-15 | 2023-08-15 | Measuring device for measuring maximum width of turning channel |
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| CN117073583B (en) | 2024-07-02 |
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