硼铝酸钠玻璃的高抗裂性的结构成因外文翻译资料

 2022-01-30 21:44:02

Radar system for motor vehicles

Abstract

A radar system for motor vehicles, having a least one radar sensor having a range of less than 50 m for monitoring traffic in an adjacent lane, wherein the radar sensor has a phase-controlled antenna and a control device for setting a plurality of radar lobes having different geometries.

Claims (11)

1. A radar system for a motor vehicle, comprising:

a control device; and

a radar sensor to monitor an area surrounding the motor vehicle without the presence of another radar sensor monitoring the same area, the sensor configured to monitor traffic in a lane adjacent to the motor vehicle, the radar sensor including a phase-controlled antenna and the control device configured to set a plurality of radar lobes having differing geometries, the control device being further configured to generate different configurations of radar lobes in succession over time by changing at least one of a total number of radar lobes being generated at a particular time and a geometry of the plurality of radar lobes, the change occurring during vehicle operation;

wherein the control device analyzes propagation times, frequencies and phases of a radar echo to determine direction from which the echo was received and distinguish which one of the plurality of radar lobes the echo originated from.

2. The radar system as recited in claim 1, wherein the control device is configured to generate at least from time to time at least two radar lobes having differing directions of emission simultaneously.

3. The radar system as recited in claim 2, wherein the radar lobes are of different sizes.

4. The radar system as recited in claim 3, wherein a larger one of the two radar lobes is oriented obliquely toward a rear and side with respect to a longitudinal direction of the motor vehicle, and a smaller one of two radar lobes is oriented to the side with respect to the longitudinal direction of the motor vehicle.

5. The radar system as recited in claim 2, wherein the radar lobes are of approximately a same size, and one of the radar lobes is oriented toward approximately a rear with respect to a longitudinal direction of the motor vehicle and the other one of the radar lobes is oriented obliquely toward the rear and to a side of the motor vehicle.

6. The radar system as recited in claim 1, wherein a configuration of radar lobes generated at a first instant is rotated by a specified angle relative to a configuration of radar lobes generated at another instant.

7. The radar system as recited in claim 1, wherein the configurations of radar lobes generated successively over time differ with regard to the number of separate radar lobes.

8. The radar system as recited in claim 7, wherein the control device is configured to alternately generate a configuration having two radar lobes and a configuration having only one radar lobe, the one radar lobe being located approximately on a bisector of the two radar lobes of the other configuration.

9. The radar system as recited in claim 1, wherein the control device is configured to vary a direction of emission of the radar lobes as a function of curvature of a road.

10. The radar system as recited in claim 6, wherein a geometry of each of the radar lobes is changed when the radar lobes are rotated.

11. The radar system as recited in claim 8, wherein the one radar lobe is formed by merging the two radar lobes.

Description

FIELD OF THE INVENTION

The present invention relates to a radar system for motor vehicles having at least one radar sensor for monitoring the area surrounding the vehicle and in particular the vehicles in an adjacent lane.

BACKGROUND INFORMATION

Using radar systems in motor vehicles, it is possible to measure the distance to other vehicles and also, using the Doppler effect, the relative speeds of other vehicles or other objects in the surroundings of the vehicle. Conventionally, they have been used to automatically bring the speed of the host vehicle in line with the speed of a preceding vehicle and to regulate the distance to the preceding vehicle.

Furthermore, in the case of radar systems which in particular also make it feasible to monitor the traffic in adjacent lanes, there are many motor vehicle applications, e.g., parking or reverse assist systems for blind-spot object detection, pre-crash functions, stop amp; go functions and the like. Pre-crash functions are functions which allow an upcoming collision to be automatically detected and averted or at least mitigated via intervention in the brake system, drive system and/or steering system and/or allow timely configuration of passive safety systems, e.g., seatbelt tighteners or airbags, with regard to the upcoming collision. Stop amp; go functions constitute a further refinement of conventional distance control systems, and in congested or city traffic allow the vehicle to be automatically braked to a standstill and if necessary move off again if the preceding vehicle moves off. As these functions are mainly used in the lower speed range and in rapidly changing traffic situations, it is particularly important to monitor the traffic in adjacent lanes.

A further possible application for radar systems of the aforementioned kind is a lane-change assistant, which helps the driver change lanes on multi-lane roads, e.g., to prevent collisions with passing vehicles.

For all the aforementioned functions, in particular radar systems having a short or medium range are used to monitor the immediate surroundings of the host vehicle, and which also provide as much spatial resolution as possible. Pulsed radar systems are particularly suitable for this purpose.

In the case of long-range radar systems such as those used for distance regulation, angular resolution systems, e.g., multiple beam radar systems are used which use a plurality of an

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Radar system for motor vehicles

Abstract

A radar system for motor vehicles, having a least one radar sensor having a range of less than 50 m for monitoring traffic in an adjacent lane, wherein the radar sensor has a phase-controlled antenna and a control device for setting a plurality of radar lobes having different geometries.

Claims (11)

1. A radar system for a motor vehicle, comprising:

a control device; and a radar sensor to monitor an area surrounding the motor vehicle without the presence of another radar sensor monitoring the same area, the sensor configured to monitor traffic in a lane adjacent to the motor vehicle, the radar sensor including a phase-controlled antenna and the control device configured to set a plurality of radar lobes having differing geometries, the control device being further configured to generate different configurations of radar lobes in succession over time by changing at least one of a total number of radar lobes being generated at a particular time and a geometry of the plurality of radar lobes, the change occurring during vehicle operation;wherein the control device analyzes propagation times, frequencies and phases of a radar echo to determine direction from which the echo was received and distinguish which one of the plurality of radar lobes the echo originated from.

2. The radar system as recited in claim 1, wherein the control device is configured to generate at least from time to time at least two radar lobes having differing directions of emission simultaneously.

3. The radar system as recited in claim 2, wherein the radar lobes are of different sizes.

4. The radar system as recited in claim 3, wherein a larger one of the two radar lobes is oriented obliquely toward a rear and side with respect to a longitudinal direction of the motor vehicle, and a smaller one of two radar lobes is oriented to the side with respect to the longitudinal direction of the motor vehicle.

5. The radar system as recited in claim 2, wherein the radar lobes are of approximately a same size, and one of the radar lobes is oriented toward approximately a rear with respect to a longitudinal direction of the motor vehicle and the other one of the radar lobes is oriented obliquely toward the rear and to a side of the motor vehicle.

6. The radar system as recited in claim 1, wherein a configuration of radar lobes generated at a first instant is rotated by a specified angle relative to a configuration of radar lobes generated at another instant.

7. The radar system as recited in claim 1, wherein the configurations of radar lobes generated successively over time differ with regard to the number of separate radar lobes.

8. The radar system as recited in claim 7, wherein the control device is configured to alternately generate a configuration having two radar lobes and a configuration having only one radar lobe, the one radar lobe being located approximately on a bisector of the two radar lobes of the other configuration.

9. The radar system as recited in claim 1, wherein the control device is configured to vary a direction of emission of the radar lobes as a function of curvature of a road.

10. The radar system as recited in claim 6, wherein a geometry of each of the radar lobes is changed when the radar lobes are rotated.

11. The radar system as recited in claim 8, wherein the one radar lobe is formed by merging the two radar lobes.

Description

FIELD OF THE INVENTION

The present invention relates to a radar system for motor vehicles having at least one radar sensor for monitoring the area surrounding the vehicle and in particular the vehicles in an adjacent lane.

BACKGROUND INFORMATION

Using radar systems in motor vehicles, it is possible to measure the distance to other vehicles and also, using the Doppler effect, the relative speeds of other vehicles or other objects in the surroundings of the vehicle. Conventionally, they have been used to automatically bring the speed of the host vehicle in line with the speed of a preceding vehicle and to regulate the distance to the preceding vehicle.

Furthermore, in the case of radar systems which in particular also make it feasible to monitor the traffic in adjacent lanes, there are many motor vehicle applications, e.g., parking or reverse assist systems for blind-spot object detection, pre-crash functions, stop amp; go functions and the like. Pre-crash functions are functions which allow an upcoming collision to be automatically detected and averted or at least mitigated via intervention in the brake system, drive system and/or steering sys

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