A method and system for measuring an indirect field of view device of an automobile

Abstract

The present invention discloses a method for measuring an indirect visual field device for an automobile, comprising the following steps: S1, parking a vehicle in a specified visual field measurement area; S2, placing a target object around the vehicle according to standard requirements; S3, symmetrically providing two cameras and a light source at the eye point of an HPM-I dummy, and providing a laser in the middle of the eye point of the HPM-I dummy; S4, placing the HPM-I dummy on the driver's seat of the vehicle; S5, starting the camera to shoot; S6, checking whether a target object appears in the mirror in the video image; S7, turning on the light source to shoot a top view of the visual field measurement area; S8, in the top view, comparing the proportion of the shadow part relative to the visual field measurement area; S9, starting the laser to align the ray emitted by the laser with the center line on the main exterior rearview mirror; S10, measuring the angle at which the head of the HPM-I dummy is rotated. The present invention provides a method for measuring an indirect visual field device for an automobile, and improves the efficiency of measuring an indirect visual field device for an automobile. The present invention also provides a system for measuring an indirect visual field device for an automobile.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile indirect visual field measurement, and in particular to an automobile indirect visual field device measurement method and system. Background Art

[0002] Indirect vision device is a device used to observe the traffic area near the vehicle that cannot be observed by direct vision. It can include traditional optical mirrors, cameras, monitors or other devices that can provide indirect vision information to the driver. It is a necessary device for observing other vehicles or pedestrians and objects during driving to ensure the driving safety of people.

[0003] Our country has requirements for the performance and installation of indirect vision devices for automobiles. In the GB15084-2013 standard, there are clear testing requirements for each indirect vision device of the automobile. During the test, the HPM-I dummy is placed on the car seat, and the seat is adjusted to the necessary position and angle according to the regulations. The HPM-I dummy is used to simulate the state of people driving. In the GB15084-2013 standard, there are strict requirements for the left and right and rear vision areas of the vehicle, the position of the exterior mirror on the driver's side of the vehicle in 6.3.4 of the standard, when determining the position of the vehicle driver's side exterior mirror, the angle between the vertical longitudinal middle plane of the vehicle and the vertical plane passing through the center of the mirror and the center of the 65 mm line connecting the driver's two eye points should be no more than 55°, and the proportion of vision obstruction in 6.5.9 of the standard.

[0004] However, the determination of the above three situations requires relatively complicated steps to be performed in the prior art. In some detection processes, specific environments and time are also required, and errors may occur during the measurement process, thus causing inconvenience to people. Summary of the invention

[0005] The object of the present invention is to provide a method and system for measuring an indirect field of view device of an automobile, which can accurately and efficiently perform measurements according to the above three standard requirements, thereby improving the efficiency of measuring the indirect field of view device of an automobile.

[0006] The technical solution adopted by a method and system for measuring an indirect visual field device of an automobile disclosed in the present invention is:

[0007] A method for measuring an indirect visual field device of an automobile comprises the following steps:

[0008] S1, park the vehicle in the specified visual field measurement area and adjust the vehicle seat to the factory design value;

[0009] S2, according to the standard requirements, place the target objects at the four corners or edges of the specified area of ​​the vehicle mirror field of view;

[0010] S3, two cameras and light sources are symmetrically arranged at the eye points of the HPM-I dummy, and the cameras are connected to the external information processing device through data cables, and a laser is arranged in the middle of the eye points of the HPM-I dummy;

[0011] S4, placing the HPM-I dummy on the good driver's seat of the vehicle set in S1, adjusting the HPM-I dummy to the specified angle and position, and setting the center line of the main exterior rearview mirror near the driver's seat side;

[0012] S5, starting the camera at the eye point of the HPM-I dummy set in S3 to shoot, and transmitting the shot video to an external information processing device;

[0013] S6, by checking whether a target object appears in the mirror in the captured video image, thereby determining whether the vehicle mirror installation meets the standard requirements;

[0014] S7, turning on the light source at the eye point of the HPM-I dummy, and setting a camera above the vehicle to capture a top view of the visual field measurement area;

[0015] S8, in the top view taken by S7, comparing the proportion of the shadow part to the field of vision measurement area, so as to determine the range of the indirect field of vision of the vehicle being blocked;

[0016] S9, start the laser set in the middle of the eye point of the HPM-I dummy set in S3, turn the head of the HPM-I dummy toward the main exterior rearview mirror on the driver's side, and align the rays emitted by the laser with the center line of the main exterior rearview mirror;

[0017] S10, measuring the rotation angle of the HPM-I dummy's head, the angle between the vertical reference plane between the center lines of the main exterior rearview mirror and the vertical reference plane of the longitudinal direction of the vehicle can be obtained.

[0018] As a preferred solution, the camera is a field of view imaging high-definition camera, the camera position is 635 mm upward on the Z axis of the HPM-I dummy three-dimensional coordinate, and the center distance is 65 mm.

[0019] As a preferred solution, in step S7, before turning on the light source, it is ensured that the vehicle is in a dark environment.

[0020] A vehicle indirect visual field device measurement system comprises an HPM-I dummy and a bird's-eye view device, wherein the HPM-I dummy comprises a head model and a trunk, wherein the head model is rotatably connected to the trunk, two cameras are arranged opposite to each other at the eye points of the head model, and the cameras are equipped with a light source, and the cameras are connected to an external information processing device via a data cable, a laser is arranged in the middle of the eye points of the head model, and the bird's-eye view device comprises a bracket and a camera, wherein the camera is fixed to the upper end of the bracket, the camera is arranged to face downward, and the camera is connected to the external information processing device.

[0021] As a preferred solution, the camera position is 635 mm upward on the Z axis of the HPM-I dummy's three-dimensional coordinates, and the center distance is 65 mm.

[0022] As a preferred embodiment, the bracket includes a base, a lifting rod and a horizontal extension rod, the lifting rod is fixed above the base, the lifting rod and the base are connected by a lifting cylinder, the horizontal extension rod is vertically arranged above the lifting rod, and a screw rod is provided on one side of the horizontal extension rod, one end of the screw rod is rotatably connected to the lifting rod, and a rotating motor is provided at the upper end of the lifting rod, the rotating motor is fixedly connected to one end of the screw rod, the surface of the screw rod is sleeved on a moving block, the moving block is threadedly connected to the screw rod, and the moving block is slidably connected to the horizontal extension rod, the camera is fixed below the moving block, and the camera is arranged to face downward.

[0023] As a preferred solution, an angle sensor is provided below the head mold, and the angle sensor is located at the rotation center of the neck below the head mold.

[0024] The beneficial effects of a vehicle indirect visual field device measurement method disclosed in the present invention are as follows: a camera is used to replace the position of a traditional incandescent lamp light source, so that when the vehicle is measuring the indirect visual field area of ​​the vehicle, it is possible to directly and effectively observe from the video picture taken by the camera simulating the human eye whether the vehicle's mirror can reflect the target object placed in the vehicle's mirror visual field specified area; and a light source is also provided at the eye point of the HPM-I dummy, and when the light source is turned on, the light emitted by the light source is reflected by the vehicle's mirror, so that a bright area is formed in the area specified in the vehicle's mirror visual field, and the bright area is equivalent to the visual field range made by people in the vehicle, and then the visual field measurement area is photographed from a bird's-eye view, and the visual field measurement area can be calculated from the photographed picture. The proportion of the shadow area to the field of vision measurement area can be used to determine the range of the indirect field of vision of the vehicle, which is more efficient and accurate than the traditional measurement method; when measuring the angle between the vertical middle plane of the longitudinal vertical plane of the vehicle and the center point of the driver's eyes connected by the center line of the mirror, the laser in the middle of the eye point of the HPM-I dummy can be turned on, and the head of the HPM-I dummy can be rotated toward the main exterior rearview mirror, so that the rays emitted by the laser are aligned with the pre-set center line of the main exterior rearview mirror. According to the angle of rotation of the head of the HPM-I dummy, the angle between the vertical reference plane of the center line of the main exterior rearview mirror and the center point of the driver's eyes connected by the center line of the main exterior rearview mirror relative to the vertical reference plane of the longitudinal vertical plane of the vehicle can be directly obtained. Through the above method, three of the requirements in the GB15084-2013 standard can be measured accurately and efficiently, improving the efficiency of the measurement of the indirect field of vision of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a flow chart of a method for measuring an indirect visual field device for an automobile.

[0026] Figure 2 The present invention is a structural diagram of an HPM-I dummy of an automobile indirect visual field device measuring system.

[0027] Figure 3 The present invention is a head model structure diagram of an HPM-I dummy of an automobile indirect visual field device measuring system.

[0028] Figure 4 The present invention is a structural diagram of a bird's-eye view device of an automobile indirect field of view device measuring system. DETAILED DESCRIPTION

[0029] The present invention will be further described and illustrated below in conjunction with specific embodiments and accompanying drawings:

[0030] Please refer to Figure 1 , a method for measuring an indirect visual field device of an automobile, comprising the following steps:

[0031] S1, park the vehicle in the specified visual field measurement area, and adjust the vehicle seat to the factory design value. The visual field measurement area used varies according to different types of vehicles. The visual field measurement area is demarcated according to the actual situation, and the measurement is performed while ensuring safety.

[0032] S2, according to the standard requirements, place target objects at the four corners or edges of the specified area of ​​the vehicle's mirror field of view. According to the requirements for the mirror field of view in 6.5 of GB15084-2013, set multiple corresponding target objects around the vehicle to be measured. By checking whether the corresponding target objects appear in the vehicle's mirror, it is determined whether the vehicle's mirror field of view meets the requirements.

[0033] S3, two cameras and light sources are symmetrically arranged at the eye point of the HPM-I dummy, and the cameras are connected to the external information processing equipment through data cables, and a laser is arranged in the middle of the eye point of the HPM-I dummy. The HPM-I dummy adopts the GB generation three-dimensional H-point measurement dummy, and multiple expansion interfaces are arranged on its surface, so that the camera and light source can be set at the eye point of the HPM-I dummy. The camera is a high-definition camera for field of view imaging, and the camera position is 635mm upward on the Z axis of the three-dimensional coordinate of the HPM-I dummy, and the center distance is 65mm. The camera is connected to the external information processing equipment through a data cable, and the external information processing equipment can be a computer or a smart device such as a mobile phone.

[0034] S4, place the HPM-I dummy on the driver's seat of the vehicle set up in S1, adjust the HPM-I dummy to the specified angle and position, and set the center line on the main exterior rearview mirror near the driver's seat. Adjust the HPM-I dummy to a standard posture on the driver's seat of the vehicle to reduce errors during the measurement process and complete the preparation process before the measurement.

[0035] S5, start the camera at the eye point of the HPM-I dummy set in S3 to shoot, and transmit the shot video to the external information processing device. Use the two cameras at the eye point of the HPM-I dummy to simulate the left and right eyes of a person, and then combine with the existing visual system to focus on the center of the mirror surface and shoot, and transmit the shot picture to the external information processing device.

[0036] S6, by checking whether there is a target object in the mirror in the captured video image, it is determined whether the vehicle mirror installation meets the standard requirements. For example, 6.5 of the GB15084-2013 standard specifies the field of view areas corresponding to different mirrors such as rearview mirrors, interior mirrors, and main exterior rearview mirrors. A target object can be placed at the boundary of the specified field of view area. By observing whether the corresponding target object appears in the mirror, it can be directly determined whether the mirror covers the corresponding field of view.

[0037] S7, turn on the light source at the eye point of the HPM-I dummy, and set a camera above the vehicle to take a bird's-eye view of the field of view measurement area. When performing detection at S7, ensure that the vehicle is in a dark environment before turning on the light source, so that the light emitted by the light source can be more clearly captured by the camera, making the shadow area formed by the occlusion more obvious, which is convenient for the software to quickly calculate.

[0038] S8, in the overhead view taken by S7, the proportion of the shadow part relative to the field of view measurement area is compared to determine the range of obstruction of the indirect field of view of the vehicle. The captured picture can be processed by existing image processing to calculate the bright and shadow parts of the picture, and the proportion of the shadow area in the field of view measurement area can be quickly obtained, thereby completing the measurement requirements of 6.5.9 in GB15084-2013 standard.

[0039] S9, start the laser set in the middle of the eye point of the HPM-I dummy set in S3, rotate the head of the HPM-I dummy toward the main exterior rearview mirror on the driver's side, and align the rays emitted by the laser with the center line of the main exterior rearview mirror.

[0040] S10, measuring the rotation angle of the HPM-I dummy's head, the angle between the vertical reference plane connecting the center line of the main exterior rearview mirror and the center points of the driver's eyes and the longitudinal vertical reference plane of the vehicle can be obtained, thereby completing the mirror setting requirements of 6.3.4 in GB15084-2013 standard.

[0041] By using a camera to replace the position of the traditional incandescent light source, when measuring the indirect field of view of the vehicle, it is possible to directly and effectively observe from the video images taken by the camera simulating the human eye whether the target object placed in the specified field of view of the vehicle mirror can be reflected in the vehicle mirror;

[0042] In addition, a light source is provided at the eye point of the HPM-I dummy. When the light source is turned on, the light emitted by the light source is reflected by the vehicle's mirrors, thereby forming a bright area in the area specified by the vehicle's mirror field of view. The bright area is equivalent to the field of view made by people in the vehicle. The field of view measurement area is then photographed from a bird's-eye view angle, and the proportion of the shadow area to the field of view measurement area can be calculated from the photographed picture, so as to determine the range of obstruction of the vehicle's indirect field of view device. Compared with traditional measurement methods, this method is more efficient and accurate.

[0043] When measuring the angle between the longitudinal vertical middle plane of the vehicle and the vertical plane connecting the center points of the driver's eyes through the center line of the mirror, the laser in the middle of the eye point of the HPM-I dummy can be turned on, and the head of the HPM-I dummy can be rotated toward the main exterior rearview mirror so that the rays emitted by the laser are aligned with the preset center line of the main exterior rearview mirror. Therefore, the angle between the vertical reference plane connecting the center line of the main exterior rearview mirror and the center points of the driver's eyes relative to the longitudinal vertical reference plane of the vehicle can be directly obtained according to the rotation angle of the HPM-I dummy's head.

[0044] Through the above method, three of the requirements in the GB15084-2013 standard can be measured accurately and efficiently, thereby improving the efficiency of the vehicle indirect field of view device measurement. The camera is used to replace the position of the traditional incandescent lamp light source, so that when the vehicle is measuring the vehicle indirect field of view device, it can be directly and effectively observed from the video picture taken by the camera simulating the human eye to see whether the vehicle's mirror can reflect the target object in the visible area of ​​the adjacent vehicle.

[0045] Furthermore, the measurement order of the above steps S5 to S6, S7 to S8 and S9 to S10 can be changed arbitrarily without affecting the measurement results, and the measurement personnel can freely adjust according to the actual situation.

[0046] Please refer to Figure 2 , Figure 3 and Figure 4 A vehicle indirect visual field device measurement system includes an HPM-I dummy 10 and a bird's-eye view device 20. The HPM-I dummy 10 includes a head mold 12 and a torso 11. The head mold 12 is rotatably connected to the torso 11. Two cameras 13 are oppositely arranged at the eye points of the head mold 12. The position of the camera 13 is 635 mm upward on the Z axis of the three-dimensional coordinate of the HPM-I dummy 10, and the center distance is 65 mm.

[0047] The camera 13 has a built-in light source 14, and the camera 13 is connected to an external information processing device via a data cable. A laser 15 is provided in the middle of the eye point of the head model 12. The overhead shooting device 20 includes a bracket 21 and a camera 22. The camera 22 is fixed to the upper end of the bracket 21, and the camera 22 is arranged to face downward, and the camera 22 is connected to the external information processing device.

[0048] The camera 13 is used to simulate the driver's vision in the vehicle, so as to judge whether the field of view meets the standard according to the mirror, and the overhead shooting device 20 can be used to shoot a top view of the vehicle exterior and the field of view measurement area.

[0049] The bracket 21 includes a base 211, a lifting rod 212 and a horizontal extension rod 213. The lifting rod 212 is fixed above the base 211. The lifting rod 212 and the base 211 are connected by a lifting cylinder 214. The horizontal extension rod 213 is vertically arranged above the lifting rod 212, and a screw rod 215 is provided on one side of the horizontal extension rod 213. One end of the screw rod 215 is rotatably connected to the lifting rod 212, and a rotating motor 216 is provided at the upper end of the lifting rod 212. The rotating motor 216 is fixedly connected to one end of the screw rod 215. The surface of the screw rod 215 is sleeved on a moving block 217. The moving block 217 is threadedly connected to the screw rod 215, and the moving block 217 is slidably connected to the horizontal extension rod 213. The camera 22 is fixed below the moving block 217, and the camera 22 is arranged to face downward.

[0050] When it is necessary to take a bird's-eye view, the lifting cylinder 214 drives the lifting rod 212 to rise, and the horizontal extension rod 213 above the lifting rod 212 also rises together, and then the rotating motor 216 drives the screw rod 215 to rotate, and the moving block 217 on the surface of the screw rod 215 is slidably connected with the horizontal extension rod 213, so that the horizontal extension rod 213 restricts the moving block 217 from rotating with the screw rod 215, so that the moving block 217 moves along the screw rod 215, and the horizontal position of the camera 22 below the moving block 217 is adjusted, so that the camera 22 can take better and more accurate photos.

[0051] An angle sensor 16 is provided below the head mold 12. The angle sensor 16 is located at the center below the head mold 12. The angle sensor 16 can more directly determine the angle of rotation of the head mold 12 during measurement, and also avoids errors caused by human calculations and measurements.

[0052] The present invention provides a method for measuring an indirect visual field device of an automobile. A camera is used to replace the position of a traditional incandescent lamp light source, so that when the vehicle is measuring the indirect visual field area of ​​the vehicle, it is possible to directly and effectively observe from the video picture taken by the camera simulating human eyes whether the vehicle's mirror can reflect a target object placed in the specified area of ​​the vehicle's mirror visual field; and a light source is also provided at the eye point of the HPM-I dummy. When the light source is turned on, the light emitted by the light source is reflected by the vehicle's mirror, so that a bright area is formed in the specified area of ​​the vehicle's mirror visual field, and the bright area is equivalent to the visual field range made by people in the vehicle. Then, the visual field measurement area is photographed from a bird's-eye view, and the shadow can be calculated from the photographed picture. The proportion of the area relative to the field of vision measurement area can determine the range of the indirect field of vision device of the vehicle that is blocked, which is more efficient and accurate than the traditional measurement method; when measuring the angle between the vertical middle plane of the longitudinal vertical plane of the vehicle and the center point of the driver's eyes connected by the center line of the mirror, the laser in the middle of the eye point of the HPM-I dummy can be turned on, and the head of the HPM-I dummy can be rotated toward the main exterior rearview mirror, so that the rays emitted by the laser are aligned with the pre-set center line of the main exterior rearview mirror. According to the angle of rotation of the head of the HPM-I dummy, the angle between the vertical reference plane of the center line of the main exterior rearview mirror and the center point of the driver's eyes connected by the center line of the main exterior rearview mirror relative to the vertical reference plane of the longitudinal vertical plane of the vehicle can be directly obtained. Through the above method, three of the requirements in the GB15084-2013 standard can be measured accurately and efficiently, improving the efficiency of the measurement of the indirect field of vision device of the vehicle.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A method for measuring an indirect visual field device of an automobile, characterized in that: The following steps are involved: S1, park the vehicle in the specified visual field measurement area and adjust the vehicle seat to the factory design value; S2, according to the standard requirements, place the target objects at the four corners or edges of the specified area of ​​the vehicle mirror field of view; S3, two cameras and light sources are symmetrically arranged at the eye point of the HPM-I dummy, and the cameras are connected to the external information processing device through a data cable, and a laser is arranged in the middle of the eye point of the HPM-I dummy; S4, place the HPM-I dummy on the driver's seat of the vehicle set in S1 as required, adjust the HPM-I dummy to the specified angle and position, and set the center line of the main exterior rearview mirror near the driver's seat side; S5, starting the camera at the eye point of the HPM-I dummy set in S3 to shoot, and transmitting the shot video to an external information processing device; S6, by checking whether a target object appears in the mirror in the captured video image, thereby determining whether the vehicle mirror installation meets the standard requirements; S7, turning on the light source at the eye point of the HPM-I dummy, and setting a camera above the vehicle to capture a top view of the visual field measurement area; S8, in the top view taken by S7, comparing the proportion of the shadow part to the field of vision measurement area, so as to determine the range of the indirect field of vision of the vehicle being blocked; S9, start the laser set in the middle of the eye point of the HPM-I dummy set in S3, turn the head of the HPM-I dummy toward the main exterior rearview mirror on the driver's side, and align the rays emitted by the laser with the center line of the main exterior rearview mirror; S10, measuring the rotation angle of the HPM-I dummy's head, and obtaining the angle between the vertical reference plane between the center lines of the main exterior rearview mirror and the center points of the driver's eyes and the longitudinal vertical reference plane of the vehicle; The camera is a high-definition camera for visual field imaging. The camera is located 635 mm upward on the Z axis of the HPM-I dummy's three-dimensional coordinates, and the center distance is 65 mm. In step S7, before turning on the light source, it is ensured that the vehicle is in a dark environment.

2. A vehicle indirect vision device measurement system for executing the method of claim 1, characterized in that: The invention comprises an HPM-I dummy and a bird's-eye view device, wherein the HPM-I dummy comprises a head model and a torso, wherein the head model is rotatably connected to the torso, two cameras are arranged opposite to each other at the eye points of the head model, and the cameras are equipped with a light source, and the cameras are connected to an external information processing device via a data cable, and a laser is arranged in the middle of the eye points of the head model, and the bird's-eye view device comprises a bracket and a camera, wherein the camera is fixed to the upper end of the bracket, and the camera is arranged to face downward, and the camera is connected to the external information processing device.

3. The vehicle indirect visual field device measuring system according to claim 2, characterized in that: The camera position is 635 mm upward on the Z axis of the HPM-I dummy's three-dimensional coordinates, and the center distance is 65 mm.

4. The vehicle indirect visual field device measuring system according to claim 2, characterized in that: The bracket includes a base, a lifting rod and a horizontal extension rod, the lifting rod is fixed above the base, the lifting rod and the base are connected by a lifting cylinder, the horizontal extension rod is vertically arranged above the lifting rod, and a screw rod is provided on one side of the horizontal extension rod, one end of the screw rod is rotatably connected to the lifting rod, and a rotating motor is provided at the upper end of the lifting rod, the rotating motor is fixedly connected to one end of the screw rod, the surface of the screw rod is sleeved on a moving block, the moving block is threadedly connected to the screw rod, and the moving block is slidably connected to the horizontal extension rod, the camera is fixed below the moving block, and the camera is arranged to face downward.

5. The vehicle indirect visual field device measuring system according to claim 2, characterized in that: An angle sensor is provided below the head mold, and the angle sensor is located at the rotation center of the neck below the head mold.

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