Vehicle running test equipment
The vehicle running test device stabilizes wheel alignment and descent detection across various vehicle types using fixed sensors, addressing the challenges of accommodating diverse tire sizes and reducing operational complexity and costs.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- DAIHATSU MOTOR CO LTD
- Filing Date
- 2022-07-26
- Publication Date
- 2026-07-22
AI Technical Summary
Existing vehicle running test devices struggle to accommodate multiple vehicle types due to varying tire sizes, requiring frequent sensor repositioning, increasing operator burden and equipment complexity and cost.
A vehicle running test device with a fixed distance sensor positioned to detect the lower part of the wheel's side surface, combined with a photoelectric sensor for descent detection, allowing for stable measurements across different vehicle types without additional sensors or increased costs.
Enables efficient and accurate wheel alignment and descent detection, reducing operator burden and equipment costs while maintaining consistent measurement accuracy and evaluation standards.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to a vehicle running test device.
Background Art
[0002] In a vehicle manufacturing site, after manufacturing a vehicle, a running test of the vehicle is performed using a dedicated device to confirm the performance of the vehicle. Also, in this type of test, in order to detect abnormalities during the running test such as tire burst, a distance sensor is arranged on the outer side in the width direction of the tire, and by measuring the distance to the upper end portion of the side surface of the tire with this distance sensor, it has been proposed to be able to detect the descent of the vehicle body and the magnitude of the sway in the left-right direction (the width direction of the vehicle) (for example, refer to Patent Document 1).
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] By the way, since this type of test is performed on a plurality of vehicle types to be manufactured, a configuration that can accommodate a plurality of vehicle types is also required for the above-described test device. However, as described in Patent Document 1, in a configuration where the distance sensor is arranged so as to be able to measure the distance to the upper end portion of the side surface of the tire, it is difficult to accommodate a plurality of vehicle types. That is, since the size (diameter) of the tire varies depending on the vehicle type, if the upper end portion of the side surface of the tire is to be the measurement target, every time the type of the vehicle to be tested changes, it is necessary to change the height direction position of the sensor, which increases the burden on the operator. Also, problems such as the measurement accuracy not being stable due to frequently changing the position of the sensor occur.
[0005] Furthermore, when conducting this type of test, in order to always evaluate performance under the same standards, it is necessary to place the wheels (tires) on the wheel drive rollers and align the wheels in the width direction. In this case, one might consider aligning the vehicle in the width direction by repeatedly loading the wheels onto the rollers while visually inspecting or measuring the position with a scale, but this places an extremely heavy burden on the worker. For example, it is possible to detect the width direction position of the wheels by placing sensors capable of measuring the distance to the wheels on the outside of the vehicle in the width direction. However, such a configuration requires a separate sensor for alignment in addition to the sensor that detects the magnitude of the width direction deviation, which leads to problems such as increased complexity of the equipment and soaring equipment costs.
[0006] In light of the above circumstances, this specification aims to solve the technical problem of enabling stable measurement of the distance to the wheels in vehicle running tests without increasing the burden on workers or incurring increased equipment costs. [Means for solving the problem]
[0007] The aforementioned problems are solved by the vehicle running test device according to the present invention. Specifically, this running test device comprises a drive roller that supports the vehicle's wheels and applies rotational driving force to the wheels, and a widthwise position detection unit that detects the widthwise position of the wheels, wherein the widthwise position detection unit is composed of a distance sensor, and the distance sensor is fixed in a predetermined position so as to be detected on the lower part of the side surface of the wheel.
[0008] As described above, the driving test apparatus according to the present invention employs a distance sensor as a widthwise position detection unit for detecting the widthwise position of the wheel, and fixes this distance sensor in a predetermined position so that the lower part of the side of the wheel is the detection target. By making the lower part of the side of the wheel the detection target of the distance sensor in this way, it is possible to detect a common part of the side of the wheel regardless of the type of vehicle, that is, even if the wheel size is different. Therefore, it is possible to perform widthwise runout measurement in a short time without the trouble of changing the position of the distance sensor each time the type of vehicle changes. In addition, regardless of the vehicle type, the distance to the wheel can be measured automatically simply by mounting the wheel on the drive roller, so widthwise alignment during mounting can be performed quickly and easily. Of course, in either case, it is not necessary to move the distance sensor in accordance with the change in vehicle type (it can remain fixed), so the measurement accuracy is stable, and consequently, it is possible to evaluate driving performance using common evaluation criteria regardless of the vehicle type. Furthermore, since widthwise runout measurement and alignment can be performed with a common distance sensor, the number of sensors can be reduced, and the driving test apparatus can be constructed at low cost.
[0009] Furthermore, the driving test device according to the present invention may further include a descent detection unit for detecting the descent of the vehicle during a driving test. In this case, the descent detection unit may consist of a photoelectric sensor capable of detecting the lower end of the vehicle body when the vehicle is descending, and a moving device for moving the photoelectric sensor in the longitudinal and vertical directions of the vehicle body.
[0010] Thus, the descent detection unit, which detects the descent of a vehicle during a driving test, is composed of a photoelectric sensor and a moving device for moving the photoelectric sensor. By enabling the lower end of the vehicle body to be detected by the photoelectric sensor when the vehicle descends, the photoelectric sensor can be positioned appropriately according to changes in the vehicle type. Therefore, even if the vehicle type changes, it is possible to reliably detect a vehicle descent of more than a predetermined amount. Furthermore, since photoelectric sensors are relatively inexpensive to obtain, even if a moving device for the photoelectric sensor is provided to change the detection position of the photoelectric sensor according to the type of vehicle, the entire descent detection unit can be manufactured at a low cost. [Effects of the Invention]
[0011] As described above, the vehicle running test device according to the present invention makes it possible to stably measure the distance to the wheels without increasing the burden on the operator or increasing equipment costs during the preparation for or execution of the running test. Therefore, lateral alignment when the vehicle is mounted can be performed quickly and easily, and the lateral sway of the vehicle during the test can be accurately grasped, allowing for safe running tests. [Brief explanation of the drawing]
[0012] [Figure 1] This is a plan view showing the overall configuration of a vehicle running test device according to one embodiment of the present invention. [Figure 2] Figure 1 is a side view of the running test device shown. [Figure 3] Figure 1 shows a flowchart illustrating an example of a vehicle driving test method using the driving test device, and is a flowchart of the preparation procedure before the start of the driving test. [Figure 4] Figure 1 shows a flowchart illustrating an example of a vehicle driving test method using the driving test device, and more particularly an example of safety control during the driving test. [Modes for carrying out the invention]
[0013] The details of the driving test device according to one embodiment of the present invention will be described below based on the drawings.
[0014] Figure 1 is a plan view showing the overall configuration of a vehicle running test device 10 according to one embodiment of the present invention, and Figure 2 is a side view of the running test device 10. In both figures, the vehicle 1 to be tested is shown mounted on the device. As shown in these figures, the running test device 10 includes a drive roller 11 that applies rotational driving force to the wheels 2 of the vehicle 1 to be tested, a width direction position detection unit 12 that detects the width direction position of the wheels 2, and first and second display units 13 and 14 that output and display the position information detected by the width direction position detection unit 12. In this embodiment, the running test device 10 further includes a descent detection unit 15 that detects the descent of the vehicle 1, and a regulating unit 16 that restricts the sway of the vehicle 1 in the width direction. The details of each element will be described below. In Figure 1, the width direction corresponds to the up and down direction, the vehicle body longitudinal direction corresponds to the left and right direction, and the vertical direction corresponds to the direction through which the paper passes. In Figure 2, the width direction corresponds to the direction through which the paper passes.
[0015] The drive roller 11 is configured to apply rotational driving force to the wheels 2 of the vehicle 1 under test, with the wheels 2 placed on top of the drive roller 11. In this embodiment, four drive rollers 11 are provided, and each drive roller 11 is capable of applying rotational driving force to each of the four corresponding wheels 2 with the wheels 2 placed on top of it.
[0016] The width direction position detection unit 12 is composed of a plurality of distance sensors 17. These plurality of distance sensors 17 are fixed in predetermined positions so that the lower portion of the side surface of the corresponding wheel 2 is the target of detection. In this embodiment, four distance sensors 17 are fixed in predetermined positions in the longitudinal and vertical directions of the vehicle body so that the lower portion of the side surface 3a of the corresponding tire 3 is the target of detection. In addition, in this embodiment, a pair of distance sensors 17a, 17a for detecting the width direction position of a pair of front wheels 2a, 2a are arranged at the same longitudinal and vertical positions of the vehicle body, and a pair of distance sensors 17b, 17b for detecting the width direction position of a pair of rear wheels 2b, 2b are arranged at the same longitudinal and vertical positions of the vehicle body.
[0017] All of the above-mentioned distance sensors 17 are displayed on the first display unit 13 and the second display unit 14.
[0018] Any known product can be used as the distance sensor 17, and in this embodiment, a laser sensor is used. In this case, the position and orientation of the distance sensor 17 (the orientation is usually set to be aligned with the width direction) are set so that the laser L emitted from the distance sensor 17 is irradiated onto the lower part of the side of the wheel 2, and in this embodiment, onto the lower part of the side 3a of the tire 3.
[0019] The first display unit 13 is capable of displaying the distance to the side of the wheel 2 detected by the distance sensor 17. In this embodiment, the first display unit 13 is positioned in front of the vehicle 1 mounted on the drive roller 11 of the running test device 10, and is positioned in a location visible to the driver of the vehicle 1 (not shown). The first display unit 13 is also capable of displaying the distances D11 and D12 from a pair of distance sensors 17a corresponding to the front wheels 2a to the lower part of the side 3a of the tire 3 of each front wheel 2a as detected by these pair of distance sensors 17a, as well as the difference D11-D12 between distances D11 and D12. The first display unit 13 is also capable of displaying the distances D21 and D22 from a pair of distance sensors 17b corresponding to the rear wheels 2b to the lower part of the side 3a of the tire 3 of each rear wheel 2b as detected by these pair of distance sensors 17b, as well as the difference D21-D22 between distances D21 and D22. In this case, it is preferable that the widthwise position of each distance sensor 17 be set such that the widthwise position on the drive roller 11 of vehicle 1 becomes the appropriate position when the distance differences D11-D12 and D21-D22 are both substantially zero.
[0020] The second display unit 14, similar to the first display unit 13, can display the distance to the side surface of the wheel 2 detected by the distance sensor 17 and the vehicle body 4 of the vehicle 1 detected by the descent detection unit 15 described later. In the present embodiment, the second display unit 14 is disposed at a position where the person in charge of the running test by the running test device 10 (not shown) can visually observe and operate. Also, in the present embodiment, in the second display unit 14 as well, the distances D11 and D12 to the lower portions of the side surfaces 3a of the tires 3 of the front wheels 2a detected by the pair of distance sensors 17a and the variation amounts of the distances D11 and D12 can be respectively displayed. Further, the second display unit 14 can display the distances D21 and D22 to the lower portions of the side surfaces 3a of the tires 3 of the rear wheels 2b detected by the pair of distance sensors 17b and the variation amounts of the distances D21 and D22 respectively.
[0021] In the present embodiment, the descent detection unit 15 includes one or more photoelectric sensors 18 and a moving device 19 that moves the one or more photoelectric sensors 18 in the vehicle body longitudinal direction and the vertical direction. In the present embodiment, two photoelectric sensors 18 are provided. These two photoelectric sensors 18 are arranged at predetermined vehicle body longitudinal direction positions and vertical direction positions such that when the vehicle 1 is mounted on the driving roller 11, the light beam R emitted from the photoelectric sensor 18 passes through the space S generated below the vehicle body 4, and when the vehicle 1 descends for some reason during the running test, the light beam R emitted from the photoelectric sensor 18 irradiates the lower end portion 4a of the vehicle body 4 (that is, the lower end portion 4a of the vehicle body 4 is detected).
[0022] When two photoelectric sensors 18 are arranged as described above, a reflector 20 is arranged at the same vehicle body longitudinal direction position and vertical direction position as each photoelectric sensor 18. Thereby, when the light beam R emitted from the photoelectric sensor 18 passes through the space S below the vehicle body 4, the light beam R is reflected by the reflector 20 located on the opposite side in the width direction of the vehicle body 4, enabling detection that the vehicle body 4 does not exist in the detection region of the photoelectric sensor 18.
[0023] The moving device 19 allows each photoelectric sensor 18 to move in the longitudinal and vertical directions of the vehicle body. Depending on the shape and size of the body 4, each photoelectric sensor 18 can be moved to a predetermined longitudinal and vertical position of the vehicle body to satisfy the illumination conditions (detection conditions) described above. In this embodiment, the appropriate longitudinal and vertical positions of the photoelectric sensor 18 are set in advance for each vehicle model to satisfy the illumination conditions described above. By selecting these vehicle-specific set positions on the second display unit 14, the operator can move each photoelectric sensor 18 to the corresponding position.
[0024] The regulating section 16 is positioned at a predetermined distance in the width direction from each wheel 2, for example. In this embodiment, four regulating sections 16 are positioned at the outer ends in the width direction of the drive roller 11. Here, the regulating section 16 is composed of, for example, a roller that can rotate around a vertical axis. In this case, the corresponding distance sensor 17 is positioned adjacent to the regulating section 16 in the longitudinal direction of the vehicle body, but further away from the wheel 2 in the width direction than the regulating section 16. This prevents interference between the distance sensor 17 and the wheel 2.
[0025] Next, an example of a vehicle 1 running test method using the running test device 10 configured as described above will be explained, mainly based on the flowcharts shown in Figures 3 and 4.
[0026] Here, the driving test method according to this embodiment is broadly divided into a preparation step S1 and a driving test step S2. The preparation step S1 includes a width direction position detection step S11, a width direction position confirmation step S12, a width direction position adjustment step S13, a vehicle body longitudinal direction position adjustment step S14, and a vehicle holding step S15. The driving test step S2 includes a width direction swing amount detection step S21, a descent detection step S22, a width direction swing amount confirmation step S23, a descent amount confirmation step S24, and an alarm issuance step S25. The steps S11 to S15 and S21 to S25 will be described below in chronological order.
[0027] (S1) Preparation process (S11) Width direction position detection step First, in step S11, when mounting the vehicle 1 onto the drive roller 11 of the running test device 10, the widthwise position of the wheels 2 is detected. Specifically, distances D11, D12, D21, and D22 are measured from a distance sensor 17 positioned at a predetermined distance in the widthwise direction from the planned mounting position of the wheels 2 (the position shown in Figure 1) to the lower part of the side surface of the wheel 2 (in this embodiment, the lower part of the side surface 3a of the tire 3). Then, the widthwise position of the wheels 2 is calculated based on the measured distances D11, D12, D21, and D22, and the widthwise position of the distance sensor 17. Note that, as will be described later, if the driver of the vehicle 1 can recognize the widthwise position of each wheel 2 from the values of the distances D11, D12, D21, and D22, or the differences between these distances D11-D12 and D21-D22, the calculation process for the widthwise position of the wheels 2 may be omitted in step S11.
[0028] (S12) Width direction position confirmation step In step S12, the widthwise position of the vehicle 1 when mounted on the driving test device 10 is confirmed. In this embodiment, the widthwise position of the vehicle 1 when mounted is confirmed to be correct (predetermined position) based on the distances D11, D12, D21, D22 and the distance differences D11-D12, D21-D22 displayed on the first display unit 13 located in front of the driver of the vehicle 1. For example, if the distance differences D11-D12 and D21-D22 are both substantially zero, the next step, vehicle body longitudinal position adjustment step S14, is performed.
[0029] (S13) Width direction position adjustment step For example, if the difference in distances D11-D12 and D21-D22 is not considered to be substantially zero, the driver moves vehicle 1 to adjust its widthwise position. When adjusting the widthwise position based on the difference in distances D11-D12 and D21-D22, vehicle 1 is moved and its widthwise position is adjusted until the difference in distances D11-D12 and D21-D22 becomes substantially zero.
[0030] (S14) Step for adjusting the front-to-rear position of the vehicle body Subsequently, the longitudinal position of the vehicle body on the drive roller 11 of the vehicle 1 is adjusted. In this case, although not shown in the diagram, an existing adjustment device may be used. By bringing the contact part of the adjustment device into contact with the front end of the vehicle 1 or its vicinity, and restricting the forward movement of the vehicle 1 at a predetermined position, it is possible to adjust the longitudinal position of the vehicle body on the drive roller 11 of the vehicle 1 to an appropriate position.
[0031] (S15) Vehicle holding step As described above, after setting the widthwise and longitudinal positions of the vehicle 1, the vehicle 1 is held in the position and orientation set at the time of position setting. In this embodiment, the vehicle 1 is held in the predetermined position and orientation by restraining it with wires. This completes the preparation for the driving test (preparation step S1).
[0032] (S2) Driving test process First, prior to the series of steps S21 to S25 described above, a running test of the vehicle 1 is started. Specifically, the rotational drive of the drive rollers 11 (four drive rollers 11 in this embodiment) is started, and rotational driving force is applied to each wheel 2 of the vehicle 1 while it is held on the drive rollers 11. Then, by rotating each drive roller 11 according to a preset program, the vehicle 1 is made to run in a predetermined manner, and the running performance of the vehicle 1 is evaluated by measuring the state of the vehicle 1 at that time. In addition, depending on the type of vehicle 1 to be tested, the photoelectric sensor 18 is moved by the moving device 19 to a predetermined position in the longitudinal direction and vertical direction of the vehicle body.
[0033] (S21) Width direction runout detection step During the aforementioned driving test, the following steps S21 to S25 are performed. First, in step S21, the amount of lateral runout of the vehicle 1 during the driving test is detected. Specifically, distances D11, D12, D21, and D22 are measured from a distance sensor 17, which is positioned at a predetermined distance in the width direction from the mounting position of the wheel 2 (the position shown in Figure 1), to the lower part of the side of the wheel 2 during driving (in this embodiment, the lower part of the side 3a of the tire 3). By continuously performing this measurement work, the amount of change in each distance D11, D12, D21, and D22 over time is calculated.
[0034] (S22) Downward detection step In this step, the downward movement of vehicle 1 during a driving test is detected. Specifically, during the driving test, a pair of photoelectric sensors 18, positioned at a predetermined distance in the width direction from vehicle 1, emit a light ray R, and the presence or absence of reflection of the light ray R is detected. That is, a light ray R is emitted from the photoelectric sensor 18, and the emitted light ray R passes through the space S located below the body 4 of vehicle 1 (the space enclosed by the lower end 4a of the body 4, the front wheels 2a, and the rear wheels 2b), reaches a reflector 20 located on the opposite side of vehicle 1 in the width direction from the photoelectric sensor 18, and after being reflected by the reflector 20, it is detected whether or not the light is received by the light receiving part (not shown) of the photoelectric sensor 18.
[0035] (S23) Step to confirm widthwise runout In step S23, the amount of widthwise sway of vehicle 1 during the driving test is confirmed. In this embodiment, the person in charge of the driving test checks the distances D11, D12, D21, D22 and the amount of variation of each distance D11, D12, D21, D22 displayed on the second display unit 14 installed at a predetermined position, and confirms whether the amount of widthwise sway is within the acceptable range. For example, if all of the amount of widthwise sway is within the acceptable range, the next step is to proceed to the downward amount confirmation step S24.
[0036] (S24) Step to confirm the amount of descent In step S24, the amount of descent of vehicle 1 during the driving test is confirmed. In this embodiment, the person in charge of the driving test checks the amount of descent of vehicle 1 displayed on the second display unit 14, specifically, whether the amount of descent of vehicle 1 is within the acceptable range. That is, in the descent detection step S22, if the light ray R emitted by the photoelectric sensor 18 is reflected by the reflector 20 and received by the light receiving unit of the photoelectric sensor 18, it is considered that there is no descent of vehicle 1, or that the amount of descent is within the acceptable range, and this is displayed on the second display unit 14.
[0037] Alternatively, if the light ray R emitted from the photoelectric sensor 18 cannot be received by the light receiving part of the photoelectric sensor 18, the vehicle 1 will descend to an unacceptable level, and the light ray R will irradiate the lower end portion 4a of the body 4. This is considered to block the light ray R, and this fact is displayed on the second display unit 14.
[0038] (S25) Alarm activation step Then, in the swing amount confirmation step S23, if the person in charge confirms that the widthwise swing amount of vehicle 1 is outside the permissible range, the person in charge issues an alarm. Alternatively, in the descent amount confirmation step S24, if the person in charge confirms that the descent amount of vehicle 1 is outside the permissible range, the person in charge issues an alarm. If an alarm is issued, for example, the drive roller 11 is immediately stopped and the running test is canceled.
[0039] The series of steps S21 to S24 described above are repeated at predetermined time intervals. Furthermore, these steps S21 to S24 are repeated until the driving test is completed (see Figure 4).
[0040] As described above, in the driving test device 10 according to this embodiment, a distance sensor 17 is used as a widthwise position detection unit 12 for detecting the widthwise position of the wheel 2, and this distance sensor 17 is fixed in a predetermined position so that the lower part of the side surface of the wheel 2 is the target of detection (see Figure 2). In this way, by making the lower part of the side surface of the wheel 2 the target of detection of the distance sensor 17, it is possible to detect a common part of the side surface of the wheel 2 regardless of the type of vehicle 1, that is, even if the size of the wheel 2 is different. Therefore, it is possible to efficiently measure the widthwise runout in a short time without the trouble of changing the position of the distance sensor 17 each time the type of vehicle 1 changes. In addition, regardless of the vehicle type, the distance to the wheel 2 can be measured automatically simply by mounting the wheel 2 on the drive roller 11, so it is possible to perform widthwise alignment during mounting without trouble and in a short time. Of course, in either case, it is not necessary to move the distance sensor 17 in accordance with the change of vehicle type (it can remain fixed), so the measurement accuracy is stable, and consequently it is possible to evaluate the driving performance with a common evaluation standard regardless of the vehicle type. Furthermore, since the same distance sensor 17 can be used to measure the runout in the width direction and perform alignment, the number of sensors can be reduced, allowing the running test device 10 to be constructed at a low cost.
[0041] Furthermore, in this embodiment, a descent detection unit 15 is provided to detect the descent of the vehicle 1 during a driving test. This descent detection unit 15 consists of a photoelectric sensor 18 capable of detecting the lower end portion 4a of the vehicle body 4 when the vehicle 1 descends, and a moving device 19 that moves the photoelectric sensor 18 in the longitudinal direction and the vertical left-right direction of the vehicle body. By configuring the descent detection unit 15 in this way, the photoelectric sensor 18 can be positioned in an appropriate location according to the change in vehicle type, so that even if the vehicle type is changed, the descent of the vehicle 1 above a predetermined amount can be reliably detected. In addition, since the photoelectric sensor 18 is relatively inexpensive to obtain, even if a moving device 19 for the photoelectric sensor 18 is provided to change the detection position of the photoelectric sensor 18 according to the type of vehicle 1, the descent detection unit 15 as a whole can be manufactured at a low cost.
[0042] Although one embodiment of the present invention has been described above, the running test apparatus and running test method according to the present invention may also adopt configurations other than those described above, without departing from the spirit of the invention.
[0043] For example, regarding the detection of the widthwise distance to the wheel 2 by the distance sensor 17, in the above embodiment, the lower part of the side surface 3a of the tire 3 of the wheel 2 was used as the detection target by the distance sensor 17, but the detection target is not limited to this. Any part of the side surface of the wheel 2 that has a relatively flat shape and allows for non-contact measurement of the distance by the distance sensor 17 may be used as the detection target (measurement target).
[0044] Furthermore, in the above embodiment, an example was given in which the descent detection unit 15 is composed of a photoelectric sensor 18 and a moving device 19, but of course the configuration of the descent detection unit 15 is not limited to this. Any type of sensor other than the photoelectric sensor 18 can be used as long as it can detect the lower end portion 4a of the vehicle body 4. Also, considering the effort involved in the work, a non-contact type sensor is preferable, but if effort is not a particular problem, a contact type sensor can be used as the sensor part of the descent detection unit 15.
[0045] Furthermore, while the above embodiment illustrates a case where the vehicle body longitudinal position adjustment step S14 is provided after the widthwise position confirmation step S12, it is of course not limited to this. For example, the widthwise position confirmation step S12 may be provided after the vehicle body longitudinal position adjustment step S14. Also, the series of steps S21 to S25 in the driving test process S2 are not limited to the order shown in the figures. For example, the widthwise swing amount detection step S21 and the descent detection step S22 may be performed in parallel. In that case, the widthwise swing amount confirmation step S23 and the descent amount confirmation step S24 may also be performed in parallel.
[0046] Furthermore, in the above embodiment, the example given was that in the alarm issuance step S25, a person who can see the second display unit 14 issues an alarm based on the information displayed on the second display unit 14. However, the main unit of the driving test device 10 or the control devices of each sensor 17, 18 may determine whether an alarm is necessary based on the amount of swing in the width direction and the amount of descent, and automatically issue an alarm.
[0047] Furthermore, the above description illustrates a case where the running test device 10 is equipped with four drive rollers 11 and the running test is performed with the four wheels 2 of the vehicle 1 mounted on these four drive rollers 11. However, the present invention can also be applied to running tests performed in a different manner. For example, although not shown in the figures, if the vehicle 1 is a front-wheel drive vehicle, the present invention may be applied to a case where the running test device 10 is equipped with only two drive rollers 11 corresponding to the front wheels 2a, and the running test is performed with the front wheels 2a of the vehicle 1 mounted on these two drive rollers 11. [Explanation of symbols]
[0048] 1 vehicle 2,2a,2b wheels 3 tires 3a side 4 Body 4a Bottom end 10. Running test equipment 11 Drive rollers 12 Width direction position detection unit 13 First display section 14 Second display section 15. Descent detection unit 16 Regulatory Department 17, 17a, 17b Distance Sensors 18 Photoelectric Sensor 19 Mobile device 20 Reflector D11, D12, D21, D22: Distance to the side of the wheel L Laser R-ray S Space S1 Preparation process S2 Driving Test Process S11 Width direction position detection step S12 Width direction position confirmation step S13 Width direction position adjustment step S14 Front / rear body position adjustment step S15 Vehicle Holding Step S2 Driving Test Process S21 Width direction runout detection step S22 Descent detection step S23 Widthwise runout confirmation step S24 Step to confirm the amount of descent S25 Alarm activation step
Claims
1. A vehicle running test device, A drive roller that supports a pair of left and right wheels of the vehicle and applies rotational driving force to each of the wheels, The system includes a widthwise position detection unit that detects the widthwise position of each of the aforementioned wheels, The width direction position detection unit consists of at least one pair of distance sensors fixed at a predetermined width direction position while facing each other in the width direction. A vehicle driving test device, wherein one distance sensor is fixed at a predetermined vehicle longitudinal and vertical position so as to detect the lower portion of the outer surface of one of the left and right wheels, and the other distance sensor is fixed at a predetermined vehicle longitudinal and vertical position so as to detect the lower portion of the outer surface of the other left and right wheel.
2. A vehicle running test device, A drive roller that supports the wheel of the vehicle and applies rotational driving force to the wheel, A widthwise position detection unit for detecting the widthwise position of the wheel, The vehicle is equipped with a descent detection unit that detects the vehicle's descent during a driving test, The width direction position detection unit is composed of a distance sensor. The distance sensor is fixed in a predetermined position so that the lower part of the side of the wheel is the target of detection. The vehicle running test apparatus comprises a photoelectric sensor capable of detecting the lower end of the vehicle body when the vehicle is descending, and a moving device that moves the photoelectric sensor in the longitudinal and vertical directions of the vehicle body.