PARKING SENSOR SYSTEM

Abstract

Parking sensor system for a vehicle (1). The system includes one or more sensor assemblies (4) for mounting to elevated mounting locations (8,9,10) on the vehicle (1), each including a RADAR sensor (7) having a downwardly facing field of view for detecting objects below the respective elevated mounting location (8,9,10) during a parking operation. At least one of the sensor assemblies (4) may further include a parking camera (6) having a downwardly facing field of view for viewing objects below the elevated mounting location (8,9,10) during the parking operation.

Claims

1. A parking sensor system for a vehicle, comprising: one or more sensor assemblies for mounting to an elevated mounting location on the vehicle, each comprising a RADAR sensor having a downwardly facing field of view for detecting objects below the elevated mounting location during a parking operation.

2. A parking sensor system according to claim 1, wherein at least one of the sensor assemblies further comprises a parking camera having a downwardly facing field of view for viewing objects below the elevated mounting location during the parking operation.

3. A parking sensor system according to claim 2, wherein the at least one sensor assembly comprising both a RADAR sensor and a parking camera further comprises a mounting for supporting the RADAR sensor and the parking camera adjacent to one another.

4. A parking sensor system according to claim 2, wherein the at least one sensor assembly comprising both a RADAR sensor and a parking camera further comprises a housing for enclosing the RADAR sensor and the parking camera.

5. A parking sensor system according to claim 2, wherein each RADAR sensor is configured to generate a RADAR output for determining a distance between a detected object and a periphery of the vehicle.

6. A parking sensor system according to claim 5, further comprising a processor for receiving RADAR outputs from the RADAR sensors and calculating distances between detected objects and the periphery of the vehicle.

7. A parking sensor system according to claim 6, wherein the processor is configured to generate a representation of the distances between detected objects and the periphery of the vehicle.

8. A parking sensor system according to claim 7, wherein the representation is at least one of an audible signal and a visual indicator.

9. A parking sensor system according to claim 6, wherein each parking camera is configured to generate a video output and the processor is configured to receive the video outputs and process these in combination with the RADAR outputs.

10. A parking sensor system according to claim 9, wherein the processor is configured to generate an augmented video output combining the video outputs with visual indicators representing the distances between detected objects and the periphery of the vehicle.

11. A parking sensor system according to claim 1, wherein at least four sensor assemblies are provided for mounting to elevated mounting locations distributed around the vehicle.

12. A parking sensor system according to claim 11, wherein the RADAR sensors in the at least four sensor assemblies have a field of view for detecting objects distanced from a periphery of the vehicle associated with a respective mounting location.

13. A parking sensor system according to claim 12, wherein the at least four sensor assemblies further comprise parking cameras.

14. A parking sensor system according to claim 13, wherein each parking camera has a field of view for viewing an area adjacent to a periphery of the vehicle associated with a respective mounting location.

15. A parking sensor system according to claim 12, wherein the at least four sensor assemblies provide a combined field of view surrounding the vehicle.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0026] Illustrative embodiments will now be described with reference to the accompanying drawings in which:

[0027] FIG. 1 shows an above schematic view of a conventional ultrasonic parking sensor system fitted to a vehicle;

[0028] FIG. 2 shows a front view of a sensor assembly used in the parking sensor system according to a first embodiment;

[0029] FIG. 3 shows a rear perspective schematic view of a vehicle incorporating a parking sensor system according to the first embodiment; and

[0030] FIG. 4 shows an above schematic view of a vehicle incorporating the parking sensor system shown in FIG. 3.

DETAILED DESCRIPTION

[0031] A parking sensor system according to a first illustrative embodiment will now be described with reference to FIGS. 2 to 4.

[0032] FIG. 2 shows a sensor assembly 4 used in the parking sensor system of the first embodiment. The sensor assembly 4 includes a camera module 6 and a RADAR sensor 7. In this embodiment, the camera module 6 and the RADAR sensor 7 are mounted within a common housing 5. However, it will be understood that in other embodiments, the camera module 6 and the RADAR sensor 7 may have separate housings and be fixed to a mounting, adjacent to one another. The camera module 6 and a RADAR sensor 7 are fixed within their mountings such that when mounted onto a vehicle, they have a downward facing field of view. The field of views of the camera modules 6 and a RADAR sensors 7 are configured to span the respective periphery of the vehicle associated with their mounting location. As such, each sensor assembly 4 may provide both camera and RADAR field of views covering a respective complete side or end of the vehicle 1.

[0033] FIG. 3 shows a rear perspective schematic view of vehicle 1 incorporating the parking sensor system according to the first embodiment. As will be understood, the parking sensor system is used to provide a driver, or an autonomous driving system, with situational awareness of objects surrounding the periphery of the vehicle. This periphery will typically be defined by the vehicle's front and rear bumpers 3, and the vehicle's side panels therebetween. These parts therefore define the perimeter of a footprint of a vehicle when viewed from above. At the same time, locations on the vehicle above the surfaces defining this perimeter, such as locations above the bumper 3, may be considered to be elevated locations in that they are above the vehicle's most peripheral surfaces.

[0034] In this respect, as shown in FIG. 3, a plurality of the sensor assemblies 4 shown in FIG. 2 are fixed to a plurality of elevated mounting locations on the vehicle 1. In this embodiment, four sensor assemblies 4 are used for providing fields of view covering the vehicle's front and rear ends, and its sides. Specifically, in this embodiment, a sensor assembly 4 associated with the rear of the vehicle 1 is mounted to the vehicle's tailgate 9, and two sensor assemblies 4 associated with the sides of the vehicle 1 are mounted beneath the vehicle's wing mirrors 8. As shown in FIG. 4, a sensor assembly 4 associated with the front of the vehicle 1 is mounted to the vehicle's front grill.

[0035] The above schematic view of the vehicle 1 shown in FIG. 4 further shows the interface connections 12 between each sensor assembly 4 and an electronic control unit (ECU) 11. In this embodiment, the electronic control unit 11 is a central electronic control unit (ECU) for providing the vehicle's park distance control (PDC) application. In alternative embodiments, the ECU 11 may be a central advanced driver assistance system (ADAS) domain controller. In this embodiment, the ECU 11 includes an I/O interface for receiving inputs from the camera modules 6 and RADAR sensors 7, and for outputting display data to a display 13 provided within the vehicle's interior. The ECU 11 further includes a microprocessor for processing the inputs and generating the display data.

[0036] In this embodiment, the camera module 6 and RADAR sensor 7 within each sensor assembly 4 shares a common interface connection 12 to the ECU 11. This sharing of a data interface and interface cable provides for cost savings and reduces installation complexity. That said, in other embodiments, separate data interfaces and interface cables may be provided for connecting the camera modules and radar sensors independently. Such independent connections may simplify connection to different ECUs within the vehicle.

[0037] In use, during a parking operation where the vehicle is being parked, the output from each RADAR sensor 7 is processed by the ECU 11 to provide object detection and distance determination, thereby replicating the functionality of the conventional ultrasonic parking sensor systems. At the same time, the camera modules 6 provide a video feed for visualisation of the surrounding area. Accordingly, the downfacing configuration of the camera modules 6 and RADAR sensors 7 within each sensor assembly 4, together with their elevated mounting locations, provide camera and RADAR fields of view around the periphery of the vehicle 1. The output feeds from the camera module and RADAR sensors are processed by the ECU 11 and output to a Human Machine Interface (HMI). In this embodiment, the Human Machine Interface (HMI) is implemented using the video display 13 within the vehicle for displaying a composite 360° above-vehicle view of the surroundings, augmented by a distance indicator for showing distance between objects and the periphery of the vehicle 1. In this way, the driver is provided with a representation of distances between detected objects and the periphery of the vehicle, in addition to being able to visualise the surroundings.

[0038] With the above, unlike ultrasonic sensors, the downfacing mounting allows the RADAR sensor 7 to be installed in the same elevated locations as the camera modules 6. That is, both camera and RADAR components may be installed in the same mounting compartments on the vehicle. Accordingly, rather than the sixteen mountings required by typical conventional camera/ultrasonic parking systems, a complete 360° field of view may be provided using only four mounting locations, namely, the front, rear and side locations.

[0039] Two sensor technologies may therefore be combined in the same position on the vehicle for simplifying installation and minimising costs, whilst still facilitating obstacle detection, distance measurement, and providing visualization of the surrounding area during vehicle parking.

[0040] It will be understood that the embodiments illustrated above shows an application only for the purposes of illustration. In practice, embodiments may be applied to many different configurations, the detailed embodiments being straightforward for those skilled in the art to implement.

[0041] For example, it will be understood that not all the sensor assemblies require a camera module. For instance, a camera module may be incorporated into the rear sensor assembly, or the front and rear sensor assembly, with the remaining sensor assemblies including the RADAR sensors only. Such configurations may thereby provide obstacle detection and distance measurement using the RADAR sensors in their downfacing orientation, with the camera modules aiding the driver's awareness by providing a rear, or front and rear, video feed.

[0042] It will also be understood that whilst the above illustrative embodiment has been described as providing a Human Machine Interface (HMI), the parking sensor system may also be used to implement automatic parking as part of a vehicle's autonomous driving functionality. For example, the RADAR sensors 7 may provide positional information, with image recognition processing of the feeds from the camera modules 6 being used to identify the location of curbs or other road features.