JP6207229B2 - Cargo vehicle centerline calculation method and centerline calculation facility - Google Patents

Description

  The present invention relates to a method for calculating a center line of a truck and its center line calculating facility in or near a facility for manufacturing a truck.

  Trucks are measured for dimensions such as full length, full width, full height after completion of manufacture. There are various shapes of trucks, and the measurer often performs direct measurement manually. Specifically, the weight is swung down from the front and rear ends or the left and right ends of the lorry, and the floor surface position swung vertically is marked. And after moving a lorry, the mark position is measured on a floor and the full length etc. of a lorry are calculated.

  In such measurement, there is a concern that a measurement error occurs due to a difference in the skill of the worker and that a large work cost is required for the measurement. Therefore, a technique (Patent Document 1) for measuring each dimension of a truck using a camera or the like has been studied. By inputting photographing data from a camera or the like to the control device, the coordinate position of each part of the truck can be obtained, and the total length or the like can be calculated based on the coordinate position. As a result, stable measurement accuracy and measurement work time can be shortened.

JP 2013-033027 A

  If a dimensional measurement facility such as Patent Document 1 is used, it is surely expected to have a great effect on the calculation of various dimensions of a lorry. There is a process to “calculate the center line of the truck” before. This center line is an important index for calculating the width value of each part of the truck, but this process is still measured directly by hand and there is still room for improvement.

The center line is calculated using wheels. After the front and rear wheels of the stopped lorry are colored with paint, the lorry is moved (rolls the wheel) by a very small distance to cause the wheel marks to adhere to the floor. Then, the center line of the truck is calculated on the floor from the wheel marks.
The main reasons for continuing such manual work are the “shape of the wheel” and the “efficiency of loading and unloading trucks with respect to the facility”.

  For example, when using optical system means such as a camera, a target part that reflects light is attached to the measurement site, and the dimensions are mechanically calculated from the coordinate position of the target part. The part is difficult to apply to wheels. The outer shape of the wheel is not only the peripheral surface but also the end in the width direction swells and curves. If the method of sticking a target part to such a curved part is taken, it will be difficult to arrange a target part in an exact position and direction, and it will become difficult to determine an exact coordinate position. Moreover, a difference in skill is likely to occur in the pasting operation itself. On the other hand, if the imaging member dedicated to the wheel provided with the target portion is fixed in advance in the calculation facility, it is highly skilled to stop the lorry accurately at the position where the wheel is close to the small imaging member. Desired. In order to suppress the difference in workmanship, if the member to be photographed is enlarged and made conspicuous, the traveling of the truck is obstructed and the facility space is unnecessarily restricted.

  The present invention has been made in view of these points, and a method for calculating a centerline of a lorry capable of improving the work efficiency in the overall process of measuring the dimensions of a lorry while maintaining the work accuracy, and the centerline thereof. The purpose is to provide a calculation facility.

In order to solve the above-mentioned problems, the following measures related to “the method for calculating the center line of a truck” and “the center line calculating facility” will be adopted.
First, as the centerline calculation method, “contact step”, “irradiation step”, “coordinate determination step”, and “centerline calculation step” are performed in order.

In the “contact step”, the target portion mounting member including the target portion is brought into contact with the wheel of the stopped truck. In the “irradiation step”, light is irradiated by the optical system means toward the mounting member. In the “coordinate determination step”, the coordinate position of the target portion is determined based on the data of the light reflected from the target portion. In the “center line calculation step”, the center line of the truck is calculated from the determined coordinate position of the target portion.
Further, in the “contact step”, the target portion mounting member is arranged so that the target portions are arranged in the front-rear direction or the width direction of the truck.

Here, with respect to the contact member used in the “contact step” described above, the structure includes a long member, and the long member is a left side portion and a right side portion or a circumferential surface of the wheel of the truck. It is good also as a method of making it contact | abut in the state which pinches | interposes the front part or back part. By using this method, the contact area or contact length with respect to the wheel can be set to a predetermined size, so that the target portion can be stably aligned with the front-rear direction or the width direction of the lorry in a stable state. Can be lined up.
Next, the center line calculation facility includes “optical system means”, “target part”, “contact member”, and “calculation part”.

  The “optical system means” is means such as a camera that irradiates the wheels of a truck that has entered the measurement location and stopped. The “target portion” is a member that reflects the light output from the optical system means, and can be directly attached to the vehicle. The “abutting member” is a member that includes the above-described target portion and further abuts against a wheel of a stopped lorry. The abutting member has a size and a configuration that can be moved or carried independently, and does not become an obstacle to the entry when the lorry enters the measurement place. The “calculation unit” is a means for determining the coordinate position of the target unit by the light reflected from the target unit and calculating the center line of the truck from the coordinate position.

  Here, the contact member includes a long member provided at a position different from the attachment surface of the target portion, and the long member has a shape extending in a direction intersecting the attachment surface of the target portion. Preferably it is. However, depending on the use of the optical system means, it may be a long member extending in a state along the surface direction of the mounting surface.

  Furthermore, the contact member may have a configuration in which a plurality of target portions are provided side by side and a guide member extending along this direction is provided. In this case, the long member is preferably provided so as to be slidable along the guide member.

  When the centerline calculation method as in the present invention is used, since the irradiation step and the centerline calculation step are provided, the centerline of the truck can be easily calculated while maintaining a certain accuracy. Moreover, since the contact step is provided, the target portion mounting member is disposed after the truck stops, and the member may be removed when the truck is moved. That is, it does not hinder the running of the truck. In particular, since the target portion mounting member is already provided with the target portion, the target portion can be quickly arranged at a predetermined position.

It is a schematic diagram which shows the truck measurement facility of the measurement place which concerns on embodiment of this invention. It is the top view and side view which show the contact member made to contact | abut to the rear-wheel of the lorry vehicle which concerns on embodiment of this invention. It is a schematic plan view which shows the imaging | photography operation | work for centerline calculation which concerns on embodiment of this invention. It is a mimetic diagram showing a lorry size measurement process of a measurement place concerning an embodiment of the present invention.

  DESCRIPTION OF EMBODIMENTS An embodiment of a truck centerline calculation method and centerline calculation facility according to the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing a facility for calculating the center line of a truck 1 and calculating dimensions such as the overall length of the truck 1. This facility becomes a place where, for example, the final process is carried when the truck 1 is manufactured. The center line (center line) refers to an imaginary line that passes through the intermediate point in the width direction of the truck 1 and extends along the front-rear direction.

  The front-wheel FT and the rear-wheel RT of the stopped truck 1 are arranged in a state where target-part mounting members 2F and 2R having target parts 2Fa and 2Ra that reflect light are in contact with each other (hereinafter referred to as target The part mounting member is simply referred to as “contact member”). The target portions 2Fa and 2Ra are attached to the contact members 2F and 2R, respectively. The target portion 2Fa of the front wheel contact member 2F faces the front, and the target portion 2Ra of the rear wheel contact member 2R is the rear. It is in a state of facing.

  In this facility, in addition to the contact members 2F and 2R, cameras 31 and 32, which are examples of the optical system means, and a PC facility serving as a control unit 40 for processing these photographing data are provided. It has been. The contact members 2F and 2R are brought into contact with the wheels FT and RT, and images are taken by the cameras 31 and 32 so that the target portions 2Fa and 2Ra are included toward the contact members 2F and 2R. As a result, image data obtained by reflecting light emitted from the cameras 31 and 32 to the target units 2Fa and 2Ra is processed by the control unit 40 in the PC, and the center line of the truck 1 is calculated.

  The control unit 40 has a coordinate position determination unit 43 that determines the coordinate positions of the target units 2Fa and 2Ra from the image data, and a center line calculation unit 44 that calculates the center line of the lorry 1 from the coordinate positions. And a center line determination unit 45 for determining the calculation accuracy of the center line. The output results such as the coordinate position and the calculated numerical value can be stored in the data storage unit 47 and output on the screen or in a document in a predetermined format via the data output unit 48. Specifically, these processes are performed according to the following procedure.

  The shooting data is input to the coordinate position determination unit 43 via the external input / output unit 41 and the shooting data reading unit 42. The photographic data reading unit 42 has a function of displaying the read photographic data on the PC screen, and the operator can immediately determine the quality of the photographic state from the display image.

  A known means (Japanese Patent Laid-Open No. 2013-033027) is used to acquire photographing data related to the calculation of the coordinate position and center line of the target units 2Fa and 2Ra using the coordinate position determination unit 43, the center line calculation unit 44, and the center line determination unit 45. Gazette). For example, when determining the coordinate position of the target unit 2Ra, the reflected light from the target unit 2Ra is projected onto a plurality of types of imaging surfaces R1, R2,. The projected positions u1, u2,... Are extracted by the coordinate position determining unit 43. Are associated with the positions u1, u2,... On the imaging planes R1, R2,.

  Here, the configuration of the contact members 2F and 2R to be photographed will be described with reference to FIG. 2 with the contact member 2R contacting the rear wheel as a representative example. 2A is a plan view of the contact member 2R, and FIG. 2B is a side view of the contact member 2R in contact with the rear wheel 2R of the lorry 1.

  As shown in FIG. 2A, the contact member 2R is slidable with four long members 21 extending in the front-rear direction of the lorry (vehicle) and four long members 21 extending in the vehicle width direction. A plate-like target portion mounting portion (hereinafter simply referred to as “mounting portion”) that is attached to a guide member 22 supported by the head and a target portion (not shown) and is erected on the vehicle rear side end portion of the long member 21. ) 23, and support portions 24 and 25 that are fixed to both ends of the guide member 22 and support the guide member 22.

  The four long members 21 are formed with recess-shaped notches provided over the entire width direction on the rear side of the vehicle. On the other hand, a V-shaped groove is formed in the guide member 22 along the longitudinal direction. The guide member 22 is fitted in the notch of the long member 21, and the long member 21 can slide along the longitudinal direction of the guide member 22.

  The four long members 21 extend in a direction perpendicular to the guide member 22, and are all disposed with respect to the rear wheel RT on the left side of the vehicle. The rear wheel RT of the lorry 1 has two tires arranged side by side. Therefore, the two long members 21a and 21b on the left side are adjusted to positions that sandwich the outer tire, and the two long members 21c and 21d on the right side are adjusted to positions that sandwich the inner tire. For each tire, the long members 21a to 21d are arranged in a direction perpendicular to the central axis direction of the tire by bringing the long members 21a to 21d into contact with both sides of the left side surface portion and the right side surface portion. Can do.

  Further, the long members 21a to 21d have a length as shown in FIG. 2B and come into contact with the rear wheel RT. As shown in the enlarged view of the figure, the long members 21a to 21d have a larger contact area as the length of the abutting portion S indicated by oblique lines with respect to the rear wheel RT, so the longitudinal direction of the guide member 22 is the rear wheel. This is preferable because it can be parallel to the central axis direction of RT. Therefore, as shown in the figure, the long members 21a to 21d are set to be longer in the vehicle front-rear direction than the portion where the tire contacts the ground.

  Here, the long members 21a and 21b for the outer tire and the long members 21c and 21d for the inner tire have taper portions 211a, 211b, 211c, and 211d extending in the longitudinal direction in the direction facing each other. Yes. Each of the outer tire and the inner tire has a curved shape in which the end portion of the circumferential surface in the vehicle width direction swells, but the long member 21 is made to be a rear wheel by having the tapered portions 211a to 211d. It can be brought into close contact with 2R. That is, it is useful for ensuring stable contact between the long members 21a to 21d and the tire.

  The long members 21a to 21d are plate members made of MC nylon (registered trademark of Quadrant Polypenco Japan Co., Ltd. (No. 4355072)), and are lighter than iron members. Further, as shown in the enlarged view of FIG. 2B, the guide member 22 is suspended by the support portion 24. Specifically, the support portion 24 is formed by assembling a support plate 24a to which the guide member 22 is fixed, and bolts 24b and 24c that are screwed to the front end portion and the rear end portion of the support plate. Bolts 24b and 24c are erected with respect to the ground, and a support plate 24a is arranged so that the guide member 22 is slightly separated from the ground. Therefore, the end of the long member 21a on the rear side of the vehicle is in a state separated from the ground by the height of H1. Therefore, the contact area with the ground is small, the frictional resistance with the ground is suppressed, and the long member 21a is easily slid with respect to the guide member 22.

The attachment portion 23 is a plate-shaped bracket, and is erected on each vehicle rear side end portion of the long member 21 so that the surface direction of the main surface intersects the longitudinal direction of the long members 21a to 21d perpendicularly. Has been. As for an attaching part, the main surface has faced the vehicle rear side, and target part 2Ra is stuck on the said main surface. That is, the target portion 2Ra is slidable along the longitudinal direction of the guide member 22 in accordance with the sliding of the long members 21a to 21d, and all of them are aligned along the longitudinal direction. As a result, when the long members 21a to 21d are brought into contact with the side surfaces of the tire, the target portion 2Ra is positioned at the end in the width direction of the tire when viewed from the rear of the vehicle.
Next, center line calculation of the truck 1 will be described with reference to FIG. For convenience of explanation, the truck 1 is indicated by a dotted line, and the target portion is hatched.

  In order to calculate the center line, the abutting step in which the abutting members 2F and 2R are arranged, and the irradiation light of the cameras 31 and 32 are irradiated (photographed) to the target portions 2Fa and 2Ra of the abutting members 2F and 2R. An irradiation step, a coordinate position determining step for determining the coordinate positions of the target units 2Fa and 2Ra, and a center line calculating step for calculating the center line by the control unit 40 such as a PC are sequentially performed.

  The contact step is performed after stopping the truck. The contact members 2F and 2R are brought into contact with the front wheel FT and the rear wheel RT. Specifically, the front wheel contact member 2F is moved from the vehicle front side to the rear side, and the rear wheel contact member 2R is moved from the vehicle rear side to the front side. After the movement, each of the long members 21a to 21d is slid along the longitudinal direction of the guide member 22, and the tapered portions 211a to 211d are brought into contact with the tire side portion so that the two long members (21a and 21b and 21c, 21d). Since the abutting member 2R is arranged so as to form the abutting portion S having a predetermined area, two long members are in good condition along the front-rear direction of the truck 1 for one tire. Whether or not there is can be easily determined by the visual and tactile sensation of the operator. Therefore, the target portions 2Fa and 2Ra can be easily arranged side by side along the width direction of the lorry 1. Regarding the contact member, there are differences in the number of long members and the number of target portions depending on the number of tires of the front wheels and the rear wheels.

  In the contact step, the operation of attaching the target portions 5a and 5b to the outer surfaces of the front and rear wheels is also performed without using the contact members 2F and 2R. The target portions 5a and 5b are attached to a cover member (not shown) covering the hub hole so as to coincide with the position of the hub hole. The cover member is removed after the contact step.

The irradiation step is performed after the contact step. Camera photography is performed from three locations on the left and right of the front wheel FT and the rear wheel RT, respectively. As shown in the figure, the shooting locations are the three locations 31a to 31c on the outer side, the front side (vehicle front side), and the inner side with respect to the front wheel FT, and the three locations on the outer side, front side (vehicle rear side), and inner side with respect to the rear wheel RT. 32a to 32c. In any place, the target portions 2Fa and 2Ra are irradiated with irradiation light, that is, the target portions 2Fa and 2Ra are included in the imaging region.
Further, in the irradiation step, camera photographing is similarly performed on the target portions 5a and 5b attached to the outer surfaces of the wheels FT and RT.

  Note that when performing camera shooting, even if the camera is fixed to the facility, the camera may be used to sequentially capture images from a plurality of positions. Furthermore, you may make it image | photograph simultaneously from several positions.

  Next, a coordinate position determination step is performed. Shooting data is output to the control unit 40 in the PC via the external input / output unit 41. The photographing data is sent to the coordinate position determination unit 43. The coordinate position determination unit 43 determines the three-dimensional coordinate positions of the target units 2Fa and 2Ra using three types of imaging data. Note that imaging data including the vicinity of each wheel FT, RT is prepared in advance for imaging data of any wheel FT, RT, and the prepared imaging data is used as a reference.

  After the coordinate position determination step, a center line calculation step is performed. This step includes a calculation sub-step by the center line calculation unit 44 and a determination sub-step for determining the quality of the calculated center line.

  In the calculation sub-step, the midpoint positions of the front wheel target portions 2Fa located at both ends of the left and right tires are calculated. The midpoints of the calculated left and right front wheels FT are connected to each other, and a front wheel connecting line L1 that is a virtual line is calculated. Similarly, the rear wheel connecting line L2 is calculated. In the case of the rear wheel connecting line L2, since the left and right rear wheels RT are each composed of two tires, the calculation of the coordinate position of the midpoint is further performed from one midpoint to another. In each of the connection lines L1 and L2 calculated in this way, the midpoint P1 of the left and right front wheels FT and the midpoint P2 of the left and right rear wheels RT are calculated, and a center line (center line) C that becomes a virtual line by connecting them. Is calculated. In addition, as for these middle points P1 and P2, each coordinate position used for calculation of each connection line L1 and L2 is utilized suitably.

In the determination sub-step, after calculating the center line C, the calculation accuracy of the front wheel connecting line L1 and the rear wheel connecting line L2 is determined. In addition, you may perform the said determination immediately after calculating each connection line L1 and L2, as what was integrated in the calculation substep.
The determination means uses the following two means.

  As a first means, the parallel state of the front wheel connecting line L1 with respect to the hub center connecting line L3 formed by connecting the target portions 5a of the left and right front wheels FT is verified. If this verification result falls within a predetermined condition, it is adopted as a good front wheel connecting line L1, and otherwise it is output as a failure calculation result. When the defect calculation result is output, the process from the contact step of the contact member 2F to the center line calculation step is performed again. The same parallel state is verified for the rear wheel connecting line L2.

  As a second means, the tire width is calculated one by one for each of the left and right rear wheels RT composed of two tires, and it is good if the widths W1 and W2 of adjacent tires are within predetermined conditions. Adopted as the rear wheel connecting line L2, and the others are output as the failure calculation results. Even in this sub-step, when the defect calculation result is output, the process from the contact step of the contact member 2R to the center line calculation step is performed again.

  Thus, although the center line calculation step has two sub-steps, the determination sub-step may be omitted. Also, only the first means or the second means may be adopted in the determination substep. In the calculation sub-step, the center line C is calculated from the midpoints P1 and P2. However, the centerline C is calculated by obtaining at least one of the midpoints P3 and P4 in the hub center connection lines L3 and L4. You may use it.

  By performing each step described above, the center line can be calculated with high accuracy. For example, as shown by a dotted line in FIG. 3B, when the long member 21a is arranged in a direction intersecting with the front-rear direction (oblique direction), the target portion 2Ra is in the vehicle width direction (left-right direction in the drawing). Since the contact member 2R according to the present embodiment has a plurality of long members 21a to 21d, the four long members 21a to 21d are not preferable because the contact members 2R of the present embodiment have a plurality of long members 21a to 21d. Cannot be brought into contact with the tire. Specifically, even if the inner long member 21d is slid so that the vehicle rear end portion 211da is located at the left end portion of the tire when viewed from the vehicle rear side, the outer long member 21a is The end 211a can be slid only to the outside of the right end of the tire. This is because the abutting member 2Ra is arranged in an inappropriate posture, so that even if the outer long member 21a is slid inward, the vehicle front side end portion 212a abuts on the tire first to regulate the sliding. It is. Therefore, the operator can easily grasp the arrangement state of the contact member 2R visually.

  Further, by adopting the first means of the determination sub-step, it is possible to determine the quality of the arrangement state of the contact member 2R even at a level that is difficult to determine visually. In addition, if the midpoints P1 to P4 calculated in the respective front-rear directions are used, it is possible to determine whether the tire direction (handle operation) is good or not when the truck 1 is stopped. That is, when any one of the midpoints P1 to P4 is not aligned in a straight line, it can be determined that the front wheel FT and the rear wheel RT do not face the same direction. Further, the rear wheel contact member 2R combined with two tires includes four target portions 2Ra. If the second means is adopted, these four target portions are all aligned in a straight line. It can be determined whether or not.

  When these operations are completed, the contact members 2F and 2R are removed and the lorry 1 is run. As described above, the contact members 2F and 2R are reduced in weight and can be easily removed.

  As described above, the method and the calculation facility according to the present embodiment can reduce the cost without reducing the calculation accuracy as compared with the method that does not use the optical system means. In particular, if the abutting members 2R and 2F are arranged in the vicinity of the front wheels FT and RT and the long member 21 is slid, the target portions 2Fa and 2Ra can be easily arranged along the vehicle width direction, and The target portions 2Fa and 2Ra can be arranged at desired positions with respect to the front wheels FT and the rear wheels RT, so that camera photography can be performed quickly. Therefore, as shown in FIG. 4, it can be completed in a short time while maintaining the measurement accuracy of the calculation of the center line (FIG. 4 (a)). In this center line calculation step, the contact members 2F and 2R are arranged on the stopped lorry 1, so that it is not necessary to obtain high accuracy at the stop position of the lorry 1. Further, since the contact members 2F and 2R are removed at the time of loading and unloading of the lorry 1, the travel is not hindered. And it can transfer to vehicle dimension measurement (FIG.4 (b)) easily after completion of a centerline calculation process. In this case, the work cost is reduced by reducing the time required for calculating the center line, which leads to the work cost of the entire process including the vehicle dimension measurement. Furthermore, the center line calculation step and the vehicle dimension measurement step are preferable because the work based on the photographing data obtained by the camera photographing is shared, so that the work man-hours for switching the working method can be omitted.

  In the measurement of the vehicle dimensions, as shown in FIG. 4B, the freight car 1 is photographed from a plurality of locations, and the three-dimensional shape of the freight car is grasped using a plurality of photographed data. A tail lamp is provided below the cargo box 6 provided in the truck 1, and when the camera is photographed at the same height or shooting angle only for grasping the external shape of the truck 1, It is difficult to accurately detect the position or size. Therefore, unlike other locations, the camera shooting at the rear portion of the lorry 1 is preferably performed separately with the camera focused on the lower side of the cargo box 6. That is, it is desirable to combine camera photography (solid arrow in the figure) for grasping the external shape of the truck 1 and camera photography (dotted arrow in the figure) focused on the tail lamp. With these combinations, the imaging data based on the solid line arrow is used for the first dimension calculation unit 46a, and the imaging data based on the dotted line arrow is used for the second dimension calculation unit 46b (see FIG. 1). As a result, the total length L and the total height H of the truck 1 can be easily calculated.

  In the present embodiment, the contact members 2F and 2R are moved from the front side or the rear side of the lorry 1. However, the contact members 2F and 2R may be moved from the width direction of the lorry 1. In this case, the part where the long member 21 contacts the front wheel or the rear wheel becomes the front part and the rear part of the front wheel or the rear wheel. Moreover, you may make it the state which faced the side of the lorry 1 also regarding target part 2Fa and 2Ra.

  In addition, although the center line calculation of the truck 1 is performed for measuring the dimensions of the truck 1, the manufacturing, repair, management, etc. of the truck 1 can be performed using the center line without being limited thereto. When performing, it can utilize suitably. For example, it can also be used for verifying the loaded state of the packed box, such as whether the center of gravity of the packed box 6 is located on the center line.

  In addition, as the optical system means, other means may be used as long as the coordinate position of each target portion can be grasped and a desired part can be measured. For example, means for measuring the distance to the target unit and the coordinate position of the target unit using a laser as an optical system unit is also known. Of course, as long as it can be used for measurement, those having other wavelengths are also applicable.

  The optical system means using the laser includes an output unit that directly outputs laser light to the target unit. Further, when the optical system means includes an input unit that detects and inputs the reflected light of the laser beam from the output unit, the input unit outputs input data to the coordinate position determination unit 43 described above. Even if the optical system means is not provided with an input unit, an input unit having the same function is separately provided and output to the coordinate position determination unit 34 is performed. Note that the input unit includes a unit that senses a layout where each target unit is placed by sensing with an image sensor, and a unit that detects reflected light and measures the position of each target from the detection time.

  Moreover, regarding the contact members 2F and 2R, the long members 21a to 21d are configured to be slidable, but the present invention is applicable without being limited thereto. For example, it is good also as a structure which attached target part 2Fa and 2Ra to the flame | frame fixed by the magnitude | size of the front wheel FT and the rear-wheel RT which were preset for every vehicle. Further, the long members 21a to 21d are provided in a state extending in a direction intersecting the guide member 22, and are provided in a direction intersecting with a direction in which the target portions are arranged (parallel direction). It is not limited to. That is, a member for attaching a target unit may be separately provided in a direction orthogonal to or intersecting with the guide member 22, and the target unit may be arranged side by side on the member. In this case, the longitudinal direction of the long members 21a to 21d and the parallel arrangement direction of the target portions are substantially parallel.

  In addition, although the method and facility described above are intended for the lorry 1 on which the cargo box 6 is mounted in the present embodiment, the present invention can also be applied to various types of vehicles. In particular, the same effect can be obtained for a vehicle (specially equipped vehicle) that carries a load, earth and sand, waste, gas, liquid, or a work machine, etc., other than the cargo box 6 mounted on the chassis frame.

  The present invention is useful as a method and means in a measurement facility where various trucks are carried.

1 Lorry
2F, 2R Contact member (target part mounting member)
2Fa, 2Ra Target part 21 Long member 22 Guide member 23 Mounting part 24 Support part 31, 32 Camera (optical system means)
40 Control Unit 41 External Input Terminal Unit 42 Image Data Reading Unit 43 Coordinate Position Determination Unit 44 Center Line Calculation Unit 45 Center Line Determination Unit

Claims (4)

An abutting step for abutting an abutting member having a target portion that reflects light against a wheel of a stopped truck;
An irradiation step of irradiating light with an optical system means toward the contact member;
A coordinate determination step for determining a coordinate position of the target unit based on data of light reflected from the target unit;
A center line calculating step for calculating the center line of the truck from the determined coordinate position in order,
In the abutting step, the abutting member is arranged so that the target portion is arranged between a left side portion and a right side portion of the wheel, or a front portion and a rear portion of a peripheral surface of the wheel, and the target portion is further The centerline calculation method for a lorry according to claim 1, wherein the contact members are arranged in a straight line in the width direction of the lorry or in the front-rear direction of the lorry . Optical means for illuminating the wheels of a stopped truck;
A target unit for reflecting light output from the optical system means;
An abutting member provided with the target portion and abutted against a wheel of a stopped lorry vehicle,
A calculation unit that determines a coordinate position of the target unit by light reflected from the target unit and calculates a center line of the truck from the coordinate position;
The abutting member includes a plurality of long members extending in parallel so as to intersect with the mounting surface of the target portion, and a guide member extending along the parallel direction of the plurality of long members. And
The long member is provided so as to be slidable along the guide member,
When the abutting member is abutted against the wheel, the target portion is set so as to be lined up between a left side portion and a right side portion of the wheel, or a front portion and a rear portion of the peripheral surface of the wheel , Furthermore the center line calculated property lorry which the target unit and wherein said Ru arranged abutment member that so as to be arranged in a straight line in the longitudinal direction in the width direction or the lorries of the lorry. The long member is
When the target portion is set to be arranged between the left side portion and the right side portion of the wheel, it is provided to be longer in the vehicle front-rear direction than the portion where the wheel is grounded,
That is provided to be longer in the longitudinal direction of the vehicle than to the region when it is set such that the target portion is arranged between the front portion及 beauty rear portion of the peripheral surface of the wheel is that the wheel is grounded The center line calculation facility for a lorry according to claim 2 , wherein the center line is calculated. The contact member, the guide member is suspended from a support portion provided on the left and right, to claim 3 in which the elongate member and having a supported configuration the guide member The centerline calculation facility for the listed lorry.

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