CN106556370B - Calibration device and calibration method for motor vehicle outline detector - Google Patents
Calibration device and calibration method for motor vehicle outline detector Download PDFInfo
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- CN106556370B CN106556370B CN201510644558.8A CN201510644558A CN106556370B CN 106556370 B CN106556370 B CN 106556370B CN 201510644558 A CN201510644558 A CN 201510644558A CN 106556370 B CN106556370 B CN 106556370B
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Abstract
The invention discloses a calibration device and a calibration method of a motor vehicle outline detector, wherein the calibration device comprises: the calibration ruler is provided with a flat calibration surface, and two end surfaces of the calibration ruler in the length direction are respectively perpendicular to the calibration surface; the leveling base is connected to the middle point position of the back of the calibration surface of the calibration ruler to support the calibration ruler and enable the calibration surface to be in a horizontal state, or the leveling base is connected to one of the two end surfaces of the calibration ruler to support the calibration ruler and enable the calibration surface to be in a vertical state; and the two horizontal indicating devices are respectively a first horizontal indicating device and a second horizontal indicating device, and the first horizontal indicating device is arranged on one side surface of the calibration scale adjacent to the calibration surface. The calibration device has the advantages of simplicity, convenience in installation and accurate calibration.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a calibration device and a calibration method of a motor vehicle outline detector.
Background
The overload and the overrun of the motor vehicle become a prominent problem which seriously affects the safety of lives and properties of people and endangers the social and economic order. In order to control the overload and overrun of the vehicle from the source, national standards GB1589-2004 'road motor vehicle overall dimension, axle load and quality limit value' and GB7258-2012 'motor vehicle operation safety technical condition' are promulgated and implemented in China, and each motor vehicle inspection station is required to carry out forced inspection on the overall dimension of the motor vehicle.
At present, the main calibration method of the motor vehicle outline detector in China is to use a known square object with a known length, width and height to simulate an automobile for calibration, but the calibration object has the advantages of large volume, high cost, difficult storage and transportation, no horizontal or vertical adjusting mechanism, and larger error inevitably caused by the calibration result; some outline detectors also use real vehicles as calibration objects, and since the vehicles are not standard objects and the outlines of the vehicles are irregular, the calibration results inevitably have larger errors.
Disclosure of Invention
In order to solve the above problems, an aspect of the present invention provides a calibration apparatus for a vehicle profile measuring apparatus, including:
the calibration ruler is provided with a flat calibration surface, and two end surfaces of the calibration ruler in the length direction are respectively perpendicular to the calibration surface;
the leveling base is connected to the back of the calibration surface of the calibration scale to support the calibration scale and enable the calibration surface to be in a horizontal state, or the leveling base is connected to one of the two end surfaces of the calibration scale to support the calibration scale and enable the calibration surface to be in a vertical state; and
the two horizontal indicating devices are respectively a first horizontal indicating device and a second horizontal indicating device, and the first horizontal indicating device and the second horizontal indicating device are connected with the calibration scale.
Further, a first level indicating device is provided on one side surface of the scale, and a second level indicating device is provided on one end surface of the scale.
Further, the leveling base is provided with an adjusting screw to adjust the horizontal or vertical state of the calibration scale.
Further, each of the two level indicating devices includes:
the level bubble base is connected to the corresponding end face of the calibration ruler;
the horizontal adjusting mechanism is connected with the level bubble base, and preferably consists of a wave washer or a spring and a screw; and
the level bubble is connected with the level bubble base through the horizontal adjusting mechanism and is round or strip-shaped.
Furthermore, the calibration ruler is in a cuboid shape, and the thickness from the calibration surface to the back surface is larger than the minimum measurement unit of the light curtain to be calibrated and measured.
Further, the length of the calibration length is in the range of 0.2m to 3m, and preferably, the length of the calibration length is 1.2 m.
In another aspect of the present invention, a calibration method using the calibration apparatus for detecting a vehicle profile is provided, and the calibration method includes:
step A: connecting the leveling base to the middle point position of the back of the calibration surface of the calibration ruler, or connecting the leveling base to one end surface of the calibration ruler;
and B, step: calibrating the horizontal state of the calibration surface by using a first horizontal indicating device and/or calibrating the vertical state of the calibration surface by using a second horizontal indicating device; and
c, step C: the calibration device is used for calibrating the motor vehicle contour detector in the height direction, the width direction and/or the length direction.
Further, the step B includes:
b1: using a theodolite or a gradienter as a reference to adjust the calibration surface to be horizontal and/or using the theodolite as a reference to adjust the calibration surface to be vertical;
b2: adjusting the first level indicating device and/or the second level indicating device to enable the horizontal state of the first level indicating device and/or the second level indicating device to be consistent with the horizontal or vertical state of the calibration surface;
b3: adjusting the leveling base to enable the calibration surface to be in a horizontal or vertical state; and
b4: and fixing the leveling base.
Further, the step C includes:
c11 step: placing the calibration device with the calibration surface in a horizontal state on a scanning surface of a height scanner of a motor vehicle outline detector, and enabling the length direction of the calibration device to be vertical to the driving direction of a motor vehicle;
c12 step: manually measuring the vertical distance between the calibration surface and the ground to be used as the actual height, scanning the calibration surface by using a height scanner, and obtaining the vertical distance between the calibration surface and the ground to be used as the scanning height; and
c13 step: repeating the steps C11 and C12 for multiple times to obtain multiple groups of actual heights and scanning heights, and calculating the linear relation between the multiple groups of actual heights and scanning heights.
Further, the calibration device is placed on the ground or a support.
Further, the step C includes:
c21 step: placing a calibration device with a calibration surface in a vertical state on a scanning surface of a width scanner of a motor vehicle outline detector, so that the calibration surface is parallel to a driving direction and is arranged towards the width scanner;
c22 step: manually measuring the vertical distance between the calibration surface and the scanner as the actual width, scanning the calibration surface by using a width scanner, and obtaining the vertical distance between the calibration surface and the scanner as the scanning width; and
c23 step: repeating the steps C21 and C22 for multiple times to obtain multiple groups of actual widths and scanning widths, and calculating the linear relation between the multiple groups of actual widths and scanning widths.
Further, the step C includes:
c31 step: placing a calibration device with a calibration surface in a vertical state in a scanning area of a length scanner of a motor vehicle outline detector, so that the calibration surface faces the length scanner and is perpendicular to a driving direction;
c32 step: manually measuring the vertical distance between the calibration surface and the length scanner as an actual length, scanning the calibration surface by using the length scanner and obtaining the vertical distance between the calibration surface and the length scanner as a scanning length; and
c33 step: repeating the steps C31 and C32 for multiple times to obtain multiple groups of actual lengths and scanning lengths, and calculating the linear relation between the multiple groups of actual lengths and scanning lengths.
The invention also provides a method for testing the measurement accuracy of the motor vehicle contour detector by simulating the motor vehicle by using the calibration device of the motor vehicle contour detector, which comprises the following steps:
step A': connecting the leveling base to the middle point position of the back of the calibration surface of the calibration ruler, or connecting the leveling base to one end surface of the calibration ruler;
b' step: calibrating the horizontal state of the calibration surface by using a first horizontal indicating device and/or calibrating the vertical state of the calibration surface by using a second horizontal indicating device; and
c', step: the calibration device is used for calibrating the motor vehicle contour detector in the height direction, the width direction and/or the length direction.
Further, the step B includes the steps of:
b1': using the theodolite or the level as a reference to adjust the calibration surface to be horizontal and/or using the theodolite as a reference to adjust the calibration surface to be vertical;
b2': adjusting the first level indicating device and/or the second level indicating device to enable the horizontal state of the first level indicating device and/or the second level indicating device to be consistent with the horizontal or vertical state of the calibration surface;
b3': adjusting the leveling base to enable the calibration surface to be in a horizontal or vertical state; and
b4': and fixing the leveling base.
Further, the step C includes:
step C11': placing the calibration device with the calibration surface in a horizontal state on a scanning surface of a height scanner of a motor vehicle outline detector, and enabling the length direction of the calibration device to be vertical to the driving direction of a motor vehicle;
step C12': manually measuring the vertical distance between the calibration surface and the ground as the actual height;
step C13': scanning the calibration surface by using a height scanner to obtain a vertical distance between the calibration surface and the height scanner, and calculating according to the known vertical distance between the scanner and the ground to obtain the vertical distance between the calibration surface and the ground as a scanning height; and
step C14': the actual height is compared to the scanned height to verify the measurement accuracy of the height scanner.
Further, the step C includes:
step C21': placing the two calibration devices with the calibration surfaces in a vertical state on the scanning surface of a width scanner of the motor vehicle outline detector, so that the calibration surfaces of the two calibration devices are arranged in a back-to-back manner and respectively face the width scanner close to the calibration surfaces;
step C22': manually measuring the vertical distance between the two calibration surfaces as the actual width;
step C23': respectively scanning the vertical distance from the calibration surface close to the width scanner by using the width scanner, and calculating the vertical distance between the two calibration surfaces according to the known vertical distance between the two width scanners to obtain the scanning width; and
step C24': the actual width is compared to the scan width to verify the measurement accuracy of the width scanner.
Further, the step C includes:
step C31': the calibration device is characterized in that two calibration devices with vertical calibration surfaces are used, one calibration device is placed in a scanning area of a length scanner of a motor vehicle outline detector, the other calibration device is placed in a measuring area of a positioning light curtain in front of the length scanner along the driving direction, so that the calibration surface of one calibration device faces the length scanner, the calibration surface of the other calibration device faces away from the length scanner, and the connecting line of the two calibration devices is parallel to the driving direction of the motor vehicle;
step C32': manually measuring the vertical distance between the two calibration surfaces as the actual length between the two calibration surfaces;
step C33': scanning one calibration surface by using a length scanner and obtaining position data of the other calibration surface in the measuring light curtain, and calculating the scanning length between the two calibration surfaces according to the length from the known length scanner to the boundary, close to the length scanner, of the measuring light curtain; and
step C34': the actual length is compared to the scan length to verify the measurement accuracy of the length scanner.
The calibration device of the motor vehicle outline detector provided by the invention has the advantages of simple structure and convenience in manufacturing, and when the calibration device is specifically applied, the calibration device is only required to be placed at different detection positions of the motor vehicle outline detector according to different calibration targets, so that the calibration device is simple to operate and wide in application range.
Drawings
The above and other aspects and features of the present invention will become apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1A is a schematic diagram of a horizontal placement state of a calibration device of a vehicle profile inspection apparatus according to an embodiment of the invention;
FIG. 1B is a schematic diagram of a calibration device of a vehicle profile inspection machine according to an embodiment of the invention in a vertical position;
FIG. 2 is a schematic illustration of calibrating an elevation using a calibration apparatus of an automotive contour inspection machine according to an exemplary embodiment of the present invention;
FIG. 3 is a schematic illustration of a calibration width using a calibration arrangement of an automotive contour inspection machine according to another exemplary embodiment of the present invention;
FIG. 4 is a schematic illustration of calibrating length using a calibration apparatus of an automotive contour inspection machine according to yet another exemplary embodiment of the present invention;
FIG. 5 is a schematic view of a length scan of a vehicle using a vehicle profile detector;
FIG. 6 is a schematic view of a width measurement and inspection of a simulated vehicle using a calibration device;
FIG. 7 is a schematic view of a calibration device used to simulate the length of a motor vehicle for measurement and inspection; and
FIG. 8 is a graph of actual values versus scanner readings for width calibration using a calibration method according to one embodiment of the present invention.
Detailed Description
The following describes in detail illustrative, non-limiting embodiments of the present invention with reference to the accompanying drawings, further illustrating a calibration apparatus and a calibration method of a vehicle contour detector according to the present invention.
According to an aspect of the present invention, a calibration apparatus for a vehicle profile inspection apparatus is provided, and referring to fig. 1, the calibration apparatus includes: the leveling device comprises a calibration scale 1, a leveling base 2 and two level indicating devices.
The calibration ruler 1 has a flat calibration surface, and two end surfaces in the length direction of the calibration ruler 1 are perpendicular to the calibration surface respectively. The scale 1 is a main body portion of the calibration device. In the calibration process, the calibration surface faces the scanner of the vehicle contour detector to serve as a scanned surface, so that the scanning light of the scanner of the vehicle contour detector can scan the calibration surface, thereby obtaining data related to the position relationship, such as the distance between the calibration surface and the scanner, and further calculating by using the data of the position relationship to obtain target data, such as the height, the width or the length, calibrated by the calibration device, which will be described in detail below.
The leveling base 2 can be connected to the back of the calibration surface of the calibration scale 1, so that the effect of supporting the calibration scale 1 and keeping the calibration scale in a horizontal state is achieved; or the leveling base 2 is connected to one end of the scale 1, thereby playing a role of supporting the scale 1 and making it in a vertical state. The leveling base 2 and the calibration scale 1 are two separable parts, the leveling base 2 and the calibration scale 1 can be combined for use according to different calibration targets, and the combination mode is simple, so that the calibration device is simple in integral structure and can be used in a wide range. However, in a more complex calibration procedure, multiple calibration devices may be used for calibration as needed. Further, an adjusting screw may be provided on the leveling base 2, and the adjusting screw may be adjusted according to the states of the two level indicating devices, so that the scale 1 is in a horizontal or vertical state.
The two level indicating devices are a first level indicating device 3 and a second level indicating device 4 respectively, wherein the first level indicating device 3 and the second level indicating device 4 are both connected with the calibration scale 1. Preferably, the first level indicating means 3 is provided on one side surface of the scale 1, and the second level indicating means 4 is provided on one end surface of the scale 1. The two horizontal indicating devices are used for assisting in adjusting the horizontal or vertical state of the calibration device. More specifically, when the calibration surface of the calibration ruler 1 is required to be in a horizontal state in the calibration process, the leveling base 2 is connected to the middle point position of the back surface of the calibration ruler 1, whether the calibration surface is completely horizontal or not is judged by using the first level indicating device 3, and if the calibration surface does not reach the horizontal state, the leveling base 2 is used for adjusting; in the calibration process, when the calibration surface of the calibration scale 1 is required to be in a vertical state, the leveling base 2 is connected to the one end surface of the calibration scale 1, whether the second horizontal indicating device 4 is balanced or not is used for judging whether the other end surface where the second horizontal indicating device 4 is located is horizontal or not, whether the calibration surface perpendicular to the other end surface is in a vertical state or not is further judged, and if the other end surface is not in a horizontal state, the leveling base 2 is used for adjusting until the other end surface is horizontal. The first horizontal indicating device 3 and the second horizontal indicating device 4 indicate accurately, and the leveling base 2 is utilized to adjust the horizontal and vertical states of the calibration scale 1, so that the whole technical scheme has the characteristics of simplicity and easiness in operation, and the measurement accuracy can be ensured.
Preferably, the calibration ruler 1 is in a cuboid shape, and the thickness from the calibration surface to the back surface of the calibration surface is greater than the minimum measurement unit of the light curtain in the motor vehicle outline detector to be calibrated. The calibration ruler 1 is made into a cuboid shape, one surface in the length direction of the cuboid can be used as a calibration surface, the surface opposite to the calibration surface is a back surface which can be connected with the leveling base 2, one side surface adjacent to the calibration surface is used for arranging the first horizontal indicating device 3, one end surface of the cuboid shape in the length direction can be connected with the leveling base 2, and the other end surface is used for arranging the second horizontal indicating device 4. The rectangular parallelepiped shape is easy to form, and is a preferred embodiment of the calibration scale 1 of the present embodiment. The vertical distance from the calibration surface to the back surface of the calibration ruler 1 is set to be larger than the minimum measurement unit of the measurement light curtain in the motor vehicle outline detector to be calibrated, so that the measurement light curtain can read the position and the thickness of the calibration ruler 1, otherwise, measurement errors are easily caused.
Preferably, the length of the scale 1 is between 0.2m and 3 m. The longer the length of the calibration scale 1, the more points the scanner reads out during calibration, the more accurate the calibration is, but the increase in the length of the calibration scale 1 also makes the distance error between both ends of the calibration surface larger due to the error of the level indicating device, and increases the cost of the calibration scale 1. Therefore, the present invention preferably sets the length of the calibration ruler 1 to be between 0.2m and 3 m. More preferably, the length of the calibration ruler 1 is set to 1.2m, so that the calibration precision of the calibration device is ensured, and the ratio of the calibration precision to the manufacturing cost is maximized.
Further, each of the above-described first level indicating device 3 and second level indicating device 4 includes: a vial base (not shown), a leveling mechanism (not shown), and a vial (not shown), wherein the vial base is attached to a corresponding end surface of the scale. Horizontal adjustment mechanism is connected with the air level base, and the air level passes through horizontal adjustment mechanism and is connected with the air level base to, the air level can be circular or bar. The two horizontal indicating devices shown in the embodiment of the invention can assist the leveling base 2 to adjust the horizontal or vertical state of the calibration surface of the calibration scale 1, the indicating precision is high, and any horizontal indicating device commonly used by a person skilled in the art can be adopted to achieve the technical effect. Preferably, the leveling mechanism consists of a wave washer or spring and screw.
It should be noted that, as shown in fig. 2 to 4, the vehicle profile inspection apparatus calibrated in the present specification employs an inspection apparatus commonly used in the art, and the vehicle profile inspection apparatus at least includes a height scanner 5, a width scanner 6, a length scanner 7 and a positioning light curtain 8. In the scanning process, the height scanner 5 forms a scanning light curtain to scan the highest point of the motor vehicle, and the vertical distance from the height scanner 5 to the ground is known, so that the height H of the motor vehicle can be calculated. The width scanner 6 comprises two width scanners 6 which are arranged at two sides of the driving lane and the connecting line of the two width scanners 6 is vertical to the driving direction, the two width scanners 6 form a scanning light curtain which is vertical to the driving direction so as to scan two sides of the motor vehicle, and the vertical distance between the two width scanners 6 is known, so that the width W of the motor vehicle is calculated according to the vertical distance from the two sides of the motor vehicle to the width scanners 6. In the process of scanning the length of the motor vehicle, the length scanner 7 is required to be matched with the positioning light curtain 8, as shown in fig. 5, the length scanner 7 is arranged at the rear side of the motor vehicle along the driving direction to form a scanning light curtain, the rear side of the motor vehicle is scanned, the vertical distance from the rear side of the motor vehicle to the length scanner 7 is obtained, and the vertical distance a between the length scanner 7 and the positioning light curtain 8 is known data. When the vehicle stops when the positioning light curtain 8 is driven to the vehicle, the length L2 of the shielded part of the positioning light curtain 8 is known, the vertical distance L1 of the rear side of the vehicle from the length scanner 7 is measured by the length scanner 7, and the vehicle length L can be calculated according to the formula L, namely A + L2-L1.
Based on the basic framework of the motor vehicle scanner, the invention further provides a motor vehicle profile detector calibration method using the motor vehicle profile detector calibration device. The calibration method comprises the following steps:
step A: the leveling base 2 is connected to the middle point position of the back of the calibration surface of the calibration scale 1, or the leveling base 2 is connected to one end surface of the calibration scale 1 in the length direction. Depending on the particular calibration situation, multiple calibration devices may be used during the calibration process. When the calibration device is used for height calibration of the motor vehicle contour detector, the calibration surface of the calibration scale 1 needs to be horizontally oriented to the scanning surface of the height scanner 5 of the motor vehicle contour detector, so that the leveling base 2 needs to be connected to the middle point position of the back surface of the calibration scale 1, and the calibration surface of the calibration scale 1 is in a horizontal state. When the calibration device is used for calibrating the width and the length of the motor vehicle outline detector, the calibration surface of the calibration scale 1 needs to vertically face the scanning surfaces of the corresponding width scanner 6 and the length scanner 7 of the motor vehicle outline detector, so that the leveling base 2 is connected to one end of the calibration scale 1 in the length direction, and the calibration surface of the calibration scale 1 is in a vertical state.
And B, step: the horizontal state of the calibration surface is calibrated using the first level indicating device 3 and/or the vertical state of the calibration surface is calibrated using the second level indicating device 4. The horizontal and/or vertical state of the calibration surface is calibrated to ensure that the calibration surface can be parallel or vertical to the scanning light curtain of the motor vehicle outline detector in the calibration process, so that the calibration precision of the motor vehicle outline detector is improved.
C, step C: the calibration device is used for calibrating the motor vehicle outline detector in the height direction, the width direction and/or the length direction. The specific calibration method will be described in detail below.
In an embodiment of the present invention, the step B may further include: b1: and adjusting the calibration surface to be horizontal by using the theodolite or the gradienter as a benchmark and/or adjusting the calibration surface to be vertical by using the theodolite as a benchmark so as to finish the primary horizontal and/or vertical positioning of the calibration surface. B2: the first and/or second level indicating means are adjusted so that the level state of the first level indicating means 3 and/or the second level indicating means 4 coincides with the level or vertical state of the calibration surface. B3: the leveling base 2 is adjusted so that the calibration surface is in a horizontal or vertical state. If the level bubble of the first and/or second level indicating device is located at the center of the level bubble base, the calibration surface is proved to be in a horizontal state and/or a vertical state; if the vial of the first and second level indicating devices is not centered on the vial base, the leveling base 2 is adjusted to adjust the calibration surface until the vial of the first and second level indicating devices is centered on the vial base. B3: after the calibration surface of the calibration device is adjusted to be in a horizontal or vertical state, the leveling base 2 of the calibration device is fixed, so that the leveling base is firm and cannot loosen in the calibration process.
As shown in fig. 2, the step C may include the following steps in the height calibration of the vehicle contour measuring apparatus according to an exemplary embodiment of the present invention. C11 step: the calibration device with the calibration surface in the horizontal state is placed on the scanning surface of the height scanner 5 of the motor vehicle outline detector, so that the calibration surface faces the height scanner 5, and the length direction of the calibration device is perpendicular to the driving direction of the motor vehicle. C12 step: the vertical distance between the calibration surface and the ground is manually measured as the actual height, and the height scanner 5 is used for scanning the calibration surface and obtaining the vertical distance between the calibration surface and the ground as the scanning height. C13 step: repeating the steps C11 and C12 for multiple times to obtain multiple groups of actual heights and scanning heights, and calculating the linear relation between the multiple groups of actual heights and scanning heights. And obtaining the linear relation between the scanning height and the actual height of the motor vehicle outline detector through the steps of C11, C12 and C13, and calculating the actual height of the motor vehicle according to the linear relation between the scanning height and the actual height in the actual scanning process.
Further, when the height of the motor vehicle contour detector is calibrated, the calibration device can be placed on the ground or a support.
As shown in fig. 3, when the width calibration is performed on the vehicle contour measuring apparatus according to another exemplary embodiment of the present invention, the step C may include the following steps. C21 step: the calibration device with the calibration surface in the vertical state is placed on the scanning surface of the width scanner 6 of the motor vehicle outline detector, so that the calibration surface is parallel to the driving direction and is arranged facing the width scanner 6. C22 step: the vertical distance between the two calibration faces is manually measured as the actual width, the calibration faces are scanned using the width scanner 6 and the vertical distance between the calibration faces and the width scanner 6 is found as the scan width. C23 step: and repeating the steps C21 and C22 for multiple times to obtain multiple groups of actual widths and scanning width values, and calculating the linear relation between the multiple groups of actual widths and scanning widths to finish the width calibration of the motor vehicle outline detector. When the motor vehicle outline detector is used for measuring the width of a motor vehicle, the width scanner 6 is used for scanning the scanning width of the motor vehicle, and the actual width of the motor vehicle is calculated by combining the linear relation.
As shown in fig. 4, when the length calibration is performed on the vehicle contour measuring apparatus according to another exemplary embodiment of the present invention, the step C may include the following steps. C31 step: the calibration device with the calibration surface in the vertical state is placed in the scanning area of the length scanner 7 of the motor vehicle profile detector such that the calibration surface of the calibration device faces the length scanner 7 and is perpendicular to the direction of travel. C32 step: the vertical distance between the calibration surface and the length scanner 7 is manually measured as the actual length, the calibration surface is scanned using the length scanner 7 and the vertical distance between the calibration surface and the length scanner 7 is found as the scan length. C33 step: and repeating the steps C31 and C32 for multiple times to obtain multiple groups of actual lengths and scanning lengths, and calculating the linear relation between the multiple groups of actual lengths and scanning lengths to finish the calibration of the length scanner 7 of the motor vehicle outline detector. When the motor vehicle outline detector is used for length scanning of a motor vehicle, the length scanner 7 is used for scanning the tail of the motor vehicle to obtain the scanning length of the motor vehicle, and the actual length of the motor vehicle is obtained by combining the linear relation.
Referring to fig. 8, the calibration method disclosed in the present invention is described below by taking the calibration of the width scanner 6 as an example:
the measuring range of the motor vehicle width by the motor vehicle outline detector is 1.2-3.5m, when a vehicle enters a measuring area of the outline detector, two side surfaces of the vehicle width are distributed at two sides of the connecting line center of two width scanners, if the distance between the two width scanners 6 is 4200mm, one width scanner 6 is calibrated by three actual widths of 0.5m, 1.0m and 1.5m respectively, and the actual width and the scanning width of the width scanner 6 are recorded:
| actual width | 500mm | 1000mm | 1500mm |
| Scanning width | 497mm | 1002mm | 1505mm |
The calibrated linear relationship is shown in fig. 8. When the calibrated motor vehicle outline detector is used for scanning the width of a motor vehicle, if the reading of the scanner is 850mm, the motor vehicle outline detector can automatically judge that the value is within the interval of 500 plus 1000mm, and corresponding linearity is used for calculation. The calculation is as follows:
(X-500)/(850-497)＝(1000-500)/(1002-497)
result in X-849.5
I.e. the actual distance of one side of the vehicle from the width scanner 6 is 849.5 mm. If the reading of the other width measuring scanner is 852mm and the corresponding actual distance is 851.5mm, the measured vehicle width of the tested motor vehicle is 4200-849.5-851.5-2498 mm
Similarly, the linear relation of the motor vehicle outline detector in the height and length directions can be obtained by utilizing the height and length calibration method in the calibration method, and the height and length values of the motor vehicle can be calculated in real scanning by utilizing the linear relation.
According to another aspect of the invention, a method for testing the accuracy of the measurement results of a motor vehicle contour measuring instrument by simulating the motor vehicle using the calibration device of the motor vehicle contour measuring instrument is also provided.
As shown in fig. 2, the method for simulating the vehicle height inspection measurement result by using the calibration device comprises the following steps: placing the calibration device with the calibration surface in a horizontal state on a scanning surface of a height scanner of a motor vehicle outline detector, and enabling the length direction of the calibration device to be vertical to the driving direction of a motor vehicle; the actual height H 'of the calibration surface is manually measured, the reading H of the height scanner 6 is read as the scanning height, and the accuracy of the height measurement can be checked by comparing the actual height H' with the scanning height H.
As shown in fig. 6, the method for simulating the vehicle width checking measurement result by using the calibration device comprises the following steps: placing the calibration devices with the two calibration surfaces in a vertical state on the scanning surface of a width scanner of the motor vehicle outline detector, so that the calibration surfaces of the two calibration devices are arranged in a back-to-back manner and respectively face the width scanner 6 close to the calibration surfaces; the accuracy of the width measurement can be checked by manually measuring the vertical distance W 'between the two calibration surfaces as the actual width between the two calibration surfaces, reading the values W1 and W2 of the two width scanners 6, respectively, and calculating the scanning width W between the two calibration surfaces B-W1-W2 from the known vertical distance B between the two width scanners 6, and comparing the actual width W' with the scanning width W.
As shown in fig. 6, the method for simulating the vehicle length inspection measurement result by using the calibration device comprises the following steps: the calibration device with two calibration surfaces in a vertical state is used, one calibration device is placed in a scanning area of a length scanner 7 of the motor vehicle outline detector, the calibration surface faces the length scanner 7, the other calibration device is placed in a measurement area of a positioning light curtain 8 in front of the driving direction, the calibration surface of the calibration device faces away from the length scanner 8, and the connecting line of the two calibration devices is parallel to the driving direction of the motor vehicle; the vertical distance L 'between the two calibration surfaces is manually measured as the actual length, the measurement value L1 of the length scanner 7 and the position value L2 of the other calibration device in the positioning light curtain 8 are read, the scanning length L between the two calibration surfaces is calculated as a-L1+ L2 according to the distance a from the length scanner 7 to the boundary of the measuring light curtain, and the accuracy of the length measurement can be checked by comparing the actual length L' with the scanning length L.
Although exemplary embodiments of the present invention have been described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (19)
1. A calibration device for a profile detector of a motor vehicle comprises:
the calibration ruler is provided with a flat calibration surface, and two end surfaces of the calibration ruler in the length direction are respectively perpendicular to the calibration surface;
the leveling base is connected to the back of the calibration surface of the calibration scale so as to support the calibration scale and enable the calibration surface to be in a horizontal state, or the leveling base is connected to one of the two end surfaces of the calibration scale so as to support the calibration scale and enable the calibration surface to be in a vertical state; and
the two horizontal indicating devices are respectively a first horizontal indicating device and a second horizontal indicating device, and the first horizontal indicating device and the second horizontal indicating device are both connected with the calibration scale.
2. The calibration device for a vehicle profile inspection machine according to claim 1, wherein the first level indicating device is provided on one side surface of the calibration scale, and the second level indicating device is provided on one end surface of the calibration scale.
3. The calibration device of the motor vehicle profile inspection machine according to claim 1, wherein the leveling base is provided with an adjusting screw to adjust a horizontal or vertical state of the calibration scale.
4. The calibration device for a vehicle profile inspection machine according to claim 1, wherein each of the two level indicating devices comprises:
a vial base connected to a respective end face of the calibrated scale;
the horizontal adjusting mechanism is connected with the level bubble base; and
the level bubble is connected with the level bubble base through the horizontal adjusting mechanism and is round or strip-shaped.
5. The calibration device of the motor vehicle profile detector according to claim 4, wherein the horizontal adjustment mechanism is composed of a wave washer and a screw or a spring and a screw.
6. The calibration device of the vehicle profile inspection machine according to claim 1, wherein the calibration ruler is rectangular parallelepiped, and the thickness from the calibration surface to the back surface is greater than the minimum measurement unit of the light curtain to be calibrated and measured.
7. The calibration device for a vehicle profile inspection machine according to claim 1, wherein the length of the calibration scale is in the range of 0.2m to 3 m.
8. The calibration device for a vehicle profile inspection machine according to claim 7, wherein the length of the calibration scale is 1.2 m.
9. A calibration method using the calibration apparatus for an automobile contour inspecting apparatus according to any one of claims 1 to 8, comprising:
step A: connecting the leveling base to the middle point position of the back of the calibration surface of the calibration scale, or connecting the leveling base to the end surface of the calibration scale;
and B, step: calibrating the horizontal state of the calibration surface by using the first horizontal indicating device and/or calibrating the vertical state of the calibration surface by using the second horizontal indicating device; and
c, step C: the calibration device is used for calibrating the motor vehicle outline detector in the height direction, the width direction and/or the length direction.
10. The calibration method according to claim 9, wherein the step B includes:
b1: using a theodolite or a gradienter as a reference to adjust the calibration surface to be horizontal and/or using the theodolite as a reference to adjust the calibration surface to be vertical;
b2: adjusting the first level indicating device and/or the second level indicating device so that the horizontal state of the first level indicating device and/or the second level indicating device is consistent with the horizontal or vertical state of the calibration surface;
b3: adjusting the leveling base to enable the calibration surface to be in a horizontal or vertical state; and
b4: and fixing the leveling base.
11. The calibration method according to claim 9, wherein the step C includes:
c11 step: placing the calibration device with the calibration surface in a horizontal state on a scanning surface of a height scanner of a motor vehicle outline detector, and enabling the length direction of the calibration device to be perpendicular to the driving direction of a motor vehicle;
c12 step: manually measuring the vertical distance between the calibration surface and the ground to be used as the actual height, scanning the calibration surface by using a height scanner, and obtaining the vertical distance between the calibration surface and the ground to be used as the scanning height; and
c13 step: repeating the steps C11 and C12 for multiple times to obtain multiple groups of actual heights and scanning heights, and calculating the linear relation between the multiple groups of actual heights and scanning heights.
12. The calibration method according to claim 11, wherein the calibration device is placed on the ground or on a support.
13. The calibration method according to claim 9, wherein the step C includes:
c21 step: placing the calibration device with the calibration surface in a vertical state on a scanning surface of a width scanner of a motor vehicle outline detector, so that the calibration surface is parallel to a driving direction and faces the width scanner;
c22 step: manually measuring the vertical distance between the calibration surface and the scanner as the actual width, scanning the calibration surface by using the width scanner, and obtaining the vertical distance between the calibration surface and the width scanner as the scanning width; and
c23 step: repeating the steps C21 and C22 for multiple times to obtain multiple groups of actual widths and scanning widths, and calculating the linear relation between the multiple groups of actual widths and scanning widths.
14. The calibration method according to claim 9, wherein the step C includes:
c31 step: placing the calibration device with the calibration surface in a vertical state in a scanning area of a length scanner of a motor vehicle outline detector so that the calibration surface faces the length scanner and is perpendicular to the driving direction;
c32 step: manually measuring the vertical distance between the calibration surface and the length scanner as an actual length, scanning the calibration surface by using the length scanner and obtaining the vertical distance between the calibration surface and the length scanner as a scanning length; and
c33 step: repeating the steps C31 and C32 for multiple times to obtain multiple groups of actual lengths and scanning lengths, and calculating the linear relation between the multiple groups of actual lengths and scanning lengths.
15. A test method for testing the accuracy of measurement of a vehicle contour detector by simulating a vehicle using the calibration apparatus of the vehicle contour detector according to any one of claims 1 to 8, comprising:
step A': connecting the leveling base to the middle point position of the back of the calibration surface of the calibration scale, or connecting the leveling base to the end surface of the calibration scale;
b' step: calibrating the horizontal state of the calibration surface by using the first horizontal indicating device and/or calibrating the vertical state of the calibration surface by using the second horizontal indicating device; and
c', step: the calibration device is used for calibrating the motor vehicle outline detector in the height direction, the width direction and/or the length direction.
16. The inspection method of claim 15, wherein the B' step comprises the steps of:
b1': using a theodolite or a gradienter as a reference to adjust the calibration surface to be horizontal and/or using the theodolite as a reference to adjust the calibration surface to be vertical;
b2': adjusting the first level indicating device and/or the second level indicating device so that the horizontal state of the first level indicating device and/or the second level indicating device is consistent with the horizontal or vertical state of the calibration surface;
b3': adjusting the leveling base to enable the calibration surface to be in a horizontal or vertical state; and
b4': and fixing the leveling base.
17. The inspection method of claim 15, wherein the C' step comprises:
step C11': placing the calibration device with the calibration surface in a horizontal state on a scanning surface of a height scanner of a motor vehicle outline detector, and enabling the length direction of the calibration device to be perpendicular to the driving direction of a motor vehicle;
step C12': manually measuring the vertical distance between the calibration surface and the ground to be used as the actual height;
step C13': scanning the calibration surface by using a height scanner to obtain a vertical distance between the calibration surface and the height scanner, and calculating according to the known vertical distance between the scanner and the ground to obtain the vertical distance between the calibration surface and the ground as a scanning height; and
step C14': comparing the actual height to the scanned height to verify the measurement accuracy of the height scanner.
18. The inspection method of claim 15, wherein the C' step comprises:
step C21': placing the two calibration devices with the calibration surfaces in a vertical state on the scanning surface of a width scanner of the motor vehicle outline detector, so that the calibration surfaces of the two calibration devices are arranged in a back-to-back manner and respectively face the width scanner close to the calibration surfaces;
step C22': manually measuring the vertical distance between the two calibration surfaces as the actual width;
step C23': respectively scanning the vertical distance from the calibration surface close to the width scanner by using the width scanner, and calculating the vertical distance between the two calibration surfaces according to the known vertical distance between the two width scanners to obtain the scanning width; and
step C24': comparing the actual width to the scan width to verify the measurement accuracy of the width scanner.
19. The inspection method of claim 15, wherein the C' step comprises:
step C31': using the calibration devices with two calibration surfaces in a vertical state, placing one calibration device in a scanning area of a length scanner of a motor vehicle outline detector, and placing the other calibration device in a measuring area of a positioning light curtain in front of the length scanner along a driving direction, so that the calibration surface of the one calibration device faces the length scanner, the calibration surface of the other calibration device faces away from the length scanner, and a connecting line of the two calibration devices is parallel to the driving direction of the motor vehicle;
step C32': manually measuring the vertical distance between the two calibration surfaces as the actual length between the two calibration surfaces;
step C33': scanning the calibration surface by using a length scanner and obtaining the position data of the other calibration surface in the measuring light curtain, and calculating the scanning length between the two calibration surfaces according to the known length from the length scanner to the boundary of the measuring light curtain close to the length scanner; and
step C34': comparing the actual length to the scan length to verify the measurement accuracy of the length scanner.
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