• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Vehicle (1) for the public transport of passengers comprising a plurality of walls (2), a roof (4) and a floor (3) which delimit an interior space (5) of the vehicle (1) suitable for the carriage of passengers , the vehicle (1) comprising image acquisition means (10) configured to detect the silhouette of the passengers in the interior space (5) and their position on the floor (3). Figure for the abstract: Fig. 1
    公开号:FR3079778A3
    申请号:FR1903638
    申请日:2019-04-04
    公开日:2019-10-11
    发明作者:Stéphane CODRON
    申请人:Iveco France SAS；
    IPC主号:
    专利说明:

    Description
    Title of the invention: SYSTEM FOR CONTROLLING THE SUSPENSION OF A VEHICLE
    TECHNICAL FIELD [0001] The present invention relates to a suspension control system for a vehicle, particularly a system for controlling the active suspensions of a vehicle for the public transport of passengers.
    PRIOR ART [0002] Buses may include active suspensions for the latter axles configured to modify the rigidity and / or the damping of the suspension elements in order to provide an action capable of compensating for the pitch and roll movements of the suspension. chassis of the vehicle and consequently guarantee the comfort of the passengers.
    The active suspension systems for vehicles are normally controlled by an electronic unit which is configured to change said physical variables according to a functional parameter of the vehicle, for example the profile of the road, the operation of the engine or the weight acting on the axles of the vehicle.
    [0004] However, in a bus, the passengers can walk inside this bus and therefore the distribution of the weight of the passengers on the floor can vary continuously even though the total weight of the passengers remains equal. It may therefore occur that the suspension control system controls the elements of the suspensions in such a way that they contribute negatively to passenger comfort.
    It is therefore necessary to improve the control systems of the active suspensions of vehicles for the public transport of passengers to increase the comfort of these.
    The invention aims to solve the aforementioned drawbacks in an economical manner. SUMMARY OF THE INVENTION [0007] The objectives mentioned above are achieved by a road vehicle for the public transport of passengers comprising a plurality of walls, a roof and a floor which delimit an interior space of said vehicle capable of carrying passengers. , said vehicle comprising image acquisition means configured to detect the silhouette of the passengers in said interior space and their position on said floor and comprising an electronic unit connected to said image acquisition means and configured to calculate the weight of each of the passengers on the basis of said silhouette and active suspensions for axles of said vehicle, said electronic unit being configured to control said active suspensions to vary the value of rigidity and / or damping of said suspension as a function of said passenger weights and their position on said floor, said means for acquisition of images being thermal cameras.
    The invention may comprise the following characteristics, taken alone or according to any one of their technically possible combinations: at least two image acquisition means, first image acquisition means positioned in the anterior portion of said vehicle and second image acquisition means positioned in the rear portion of the vehicle, the first and second image acquisition means being configured to view the entire floor of said vehicle, - said electronic unit is connected to said image acquisition means either by a wired connection, or by a wi-fi connection, - said electronic unit is the ECU of said vehicle, - said weight is calculated according to the height and the width of said silhouette - said position is calculated as a coordinate point in a plane represented by said floor.
    The invention also relates to a method for controlling active suspensions of such a vehicle, comprising the following phases: - detection of an image of the interior space of the vehicle; - recognition of the silhouette and the position of the passengers in said interior space of said vehicle; estimating the weight of each of the passengers acting on said floor of said vehicle; estimating the weight acting on the axles of said vehicle; control of the rigidity / damping of the suspensions of said vehicle on the basis of said weights on said floor and said reactions to the axles.
    The method may include the step of counting the number of said silhouettes and store it in said electronic unit.
    BRIEF DESCRIPTION OF THE DRAWINGS [0011] Other characteristics and advantages of the invention will emerge clearly from the description which is given hereinafter, by way of indication and in no way limitative, with reference to the appended drawings, in which: [0012] Fig. 1] is a perspective view of a vehicle with parts removed for the sake of clarity and comprising a system according to the invention; and [0013] [fig.2] Figure 2 is a schematic side sectional view of the vehicle of Figure 1.
    DESCRIPTION OF THE EMBODIMENTS [0014] The following description refers to a bus, for the sake of clarity and in no way limiting, since the following description is suitable for application to other types of road vehicles.
    Figure 1 illustrates a bus 1 of known type comprising a plurality of walls 2, a floor 3 and a roof 4 configured to delimit an interior space 5 of the bus 1 suitable for passenger transport. The bus 1 also comprises a plurality of wheels 7, anterior and posterior, carried by a respective axle 8 which is connected to the chassis of the vehicle by active suspensions, not shown.
    According to the present invention the bus 1 comprises a plurality of image acquisition means configured to see an area inside the bus 5 and configured to detect the silhouette of the passengers and their position X; , Y; On the floor 3. Advantageously, the image acquisition means are cameras 10, preferably thermal cameras.
    Preferably the cameras 10 are at least two in number, a first camera 10 placed in an anterior portion of the bus, for example carried by the front wall 2 and facing the interior space 5 of the vehicle 1 and a second camera 10 placed in a rear portion of the bus 1, for example carried by the rear wall 2 and facing the interior space 5 of the vehicle 1. In the case of a bus 1 of great length, the bus could comprise a third camera 10 (or a fourth) carried by one of the side walls 2 and placed in an intermediate position with respect to the cameras 10 anterior and posterior.
    The vehicle 1 also comprises an electronic unit (not shown) electronically connected to the cameras 10 and suspensions of the vehicle 1, for example through a wired connection or wireless transmission means. The electronic unit is configured to acquire the passenger silhouettes data and their position X, Y; relative to the floor 3 and to calculate the weight F; of each of the passengers on the basis of their silhouette. Preferably, the electronic unit is the ECU of the vehicle 1.
    The weight F; is calculated on the basis of the silhouette for example according to the height and the width of the passenger who are confronted with average values of weight tabulated which can be stored in the electronic unit. Alternatively, a mathematical formula based on at least the height and width of the passenger's silhouette could provide an estimate of the weight F; of the passenger.
    The position of the silhouette is for reference a point on the plane defined by the floor 3. This point can be defined as the intersection of the sagittal and frontal planes of the silhouette of a passenger with the plane of the floor 3. This point has a distance X ;, Y; relative to a fixed position of the floor 3, for example the anterior end of the floor 3.
    The electronic unit is further configured, knowing the weights F; passengers and their positions X ;, Y; on the floor 3, to calculate the R reactions; to the axles 8 of the vehicle 1. This calculation can be carried out as the solution of a force system taking into account the knowledge of the value of each force F; and his position. Alternatively, this calculation could be performed through other solution systems of a known type of force system, for example the fundamental principle of the static, ie ZF equals zero at equilibrium.
    Once known R reactions; at the axles 8, the electronic unit adjusts the stiffness and / or damping values of the elements of the active suspensions of the vehicle to guarantee passenger comfort. The stiffness and / or damping values of the elements of the active suspensions may be chosen from tabulated values as a function of the reactions R; the axles 8 stored in the electronic unit or calculated on the basis of the R reactions; with axles 8.
    The operation of a vehicle 1 comprising a control system according to the invention is as follows.
    The cameras 10 continually monitor the interior 5 of the vehicle 1 by detecting the silhouette of the passengers and their position on the floor 3.
    The data relating to the silhouette of the passengers and their position are received in real time by the electronic unit which performs the calculations of the reactions R; to 8 axles due to the position and appearance of the passengers. Preferably the calculation can be repeated continuously to control the suspensions in real time, alternatively the electronic unit can perform the calculation at fixed time intervals, for example every minute. If the position of the passengers varies, the suspensions will be checked accordingly with each update of the acquired images.
    The invention further relates to a method for controlling suspensions of a vehicle 1 as described above and comprising the following phases: - detection of an image of the interior 5 of the vehicle 1; - recognition of the silhouette and the X, Y position; passengers inside the vehicle 1; - estimation of the weight F; of each of the passengers agent on the floor 3 of the vehicle 1; - estimation of the reaction R; to the axles 8 of the vehicle 1; - control of suspensions of vehicle 1 on the basis of axle reactions 8.
    The method may also include the subsequent phase of counting the number of passengers on the bus and memorize this number in the electronic unit.
    From the foregoing, the advantages of a vehicle 1 comprising a control system according to the present invention are obvious.
    With the system according Γinvention, the reactions to the axles 8 can be known in real time in a precise and economical manner.
    [0030] In addition, the use of thermal cameras makes it possible to detect a silhouette accurately without the interference of the other elements placed inside the bus, for example the support columns, because these elements are cold relative to each other. to the bodies of the passengers.
    Finally, the weight of passengers could be used, in fully electric vehicles, to accurately calculate the range of the vehicle.
    Finally, it is clear that the vehicle comprising a control system according to the present invention may be subject to modifications and variants which, however, do not depart from the scope of protection defined by the claims.
    The image acquisition means could be made differently, their number and position could singularly vary from this described or, still, the calculation logic of the reactions to the axles 8 could be performed differently.
    For example, the image acquisition means could be infrared cameras.
    权利要求:
    Claims (1)
    [1" id="c-fr-0001]
    Claims [Claim 1] Vehicle (1) for the public transport of passengers comprising a plurality of walls (2), a roof (4) and a floor (3) which delimit an interior space (5) of said vehicle (1) capable of carrying passengers, said vehicle (1) comprising image acquisition means (10) configured to detect the silhouette of the passengers in said interior space (5) and their position (X; Y;) on said floor (3) and comprising an electronic unit connected to said image acquisition means (10) and configured to calculate the weight of each of the passengers on the basis of said silhouette and active suspensions for axles (8) of said vehicle ( 1), said electronic unit being configured to control said active suspensions to vary the stiffness and / or damping value of said suspension as a function of said passenger weights and their position (X, Y;) on said floor (3) , the said image acquisition means (10) being thermal cameras. [Claim 2] A road vehicle according to claim 1, characterized by comprising at least two image acquisition means (10), first image acquisition means (10) positioned in the front portion of said vehicle (1) and second image acquisition means (10) positioned in the rear portion of the vehicle (1), the first and second image acquisition means (10) being configured to view the entire floor ( 3) of said vehicle (D- [Claim 3] Road vehicle according to claim 1 or 2, characterized in that said electronic unit is connected to said image acquisition means (10) either by a wired connection, or by a wi-fi connection [Claim 4] Road vehicle according to one of the preceding claims, characterized in that said electronic unit is the ECU of said vehicle (1). [Claim 5] Road vehicle according to one of the preceding claims, characterized in that said weight is calculated according to the height and width of said silhouette. [Claim 6] Road vehicle according to one of the preceding claims, characterized in that said position (X; Y;) is calculated as a coordinate point in a plane represented by said floor (3). [Claim 7] Method for controlling active suspensions of a vehicle (1) according to one of the preceding claims, characterized by understanding the following phases: - detecting an image of the interior space (5) of the vehicle; - recognition of the silhouette and the position of the passengers in said interior space (5) of said vehicle (1); estimating the weight of each of the passengers acting on said floor (3) of said vehicle (1); estimating the weight acting on the axles (8) of said vehicle (1); control of the rigidity / damping of the suspensions of said vehicle (1) on the basis of said weights on said floor (3) and said reactions to the axles (8). [Claim 8] A method according to claim 7, characterized by comprising the step of counting the number of said silhouettes and storing it in said electronic unit.
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3079778B3|2020-04-10|
    DE202019101879U1|2019-07-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP3929811A1|2020-06-23|2021-12-29|Iveco France S.A.S.|Driving control system for an autonomous vehicle|
    DE102020202302A1|2020-02-24|2021-08-26|Zf Friedrichshafen Ag|System and method for optimizing the load distribution of given components of a vehicle|
    GB2597457A|2020-07-21|2022-02-02|Jaguar Land Rover Ltd|Vehicle active suspension control system and method|
    法律状态:
    2020-04-29| PLFP| Fee payment|Year of fee payment: 2 |
    2021-04-27| PLFP| Fee payment|Year of fee payment: 3 |
    优先权:
    申请号 | 申请日 | 专利标题
    IT201800004205|2018-04-04|
    IT102018000004205|2018-04-04|
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