METHOD AND DEVICE FOR DETERMINING AT LEAST ONE PARAMETER OF AN OBJECT

Abstract

The invention relates to a method for determining at least one parameter of an object, wherein the method comprises the following steps: a. provision of a range-Doppler matrix, b. transfer of at least one part of the range-Doppler matrix to a neural network and c. identification of the at least one parameter by the neural network.

Claims

1. A method for determining at least one parameter of an object, comprising: providing a range-Doppler matrix, transferring at least one part of the range-Doppler matrix to a neural network, and determining at least one parameter of the object by the neural network, wherein the object is a road user.

2. The method according to claim 1, wherein the at least one parameter is selected from the group consisting of a distance and/or a radial velocity relative to a measurement point, an expansion of the object in at least one spatial direction, a velocity of the object, and at least one classification property and/or a classification of the object and/or an allocation of a zone of reflected energy to a physical object different from the object.

3. The method according to claim 1 wherein at least one zone of reflected energy is selected from the range-Doppler matrix, wherein said at least one zone of reflected energy contains at least one local maximum and wherein either or both said at least one zone of reflected energy or said at least one maximum is transferred to the neural network.

4. The method according to claim 1 wherein the step of providing the range-Doppler matrix comprises the following steps: receiving reception signals, mixing the reception signals with transmission signals to form baseband signals, and calculating a range-Doppler matrix using the baseband signals, wherein the transmission signals are emitted before the reception signals are received.

5. The method according to claim 4 wherein the transmission signals comprise at least two different types of frequency ramps, which are transmitted successively or simultaneously.

6. The method according to claim 5, wherein Doppler frequencies and/or phase information of the baseband signals are evaluated, and further comprising eliminating ambiguities when determining a radial velocity.

7. The method according to claim 4, wherein several antennae are used to emit the transmission signals and/or to receive the reception signals.

8. The method according to claim 1 further comprising estimating a quality of the determined parameter.

9. A device for conducting a method according to claim 1, wherein the device comprises at least one electronic data processing device which is configured to conduct the method.

10. The device according to claim 9, further comprising at least one transmission antenna and at least one reception antenna for radar waves.

Description

[0037] In the following, an example of an embodiment of the present invention will be explained in more detail by way of the attached figures: They show:

[0038] FIG. 1the schematic representation of a measuring arrangement and

[0039] FIG. 2the schematic section from a range-Doppler matrix.

[0040] FIG. 1 schematically depicts a top view of a sensor 2 for emitting and receiving radar waves as well as a truck with a tractor unit 4, which features a driver's cab 6, a container area 8 and a trailer 10.

[0041] In the example of an embodiment shown, the entire truck 4 moves at a velocity that is marked on the driver's cab 6 as well as on the container area 8 and the trailer 10, and is represented by the arrow V. The sensor 2 emits radar waves. Three directions 12 are shown which terminate at the different elements of the truck 4 on which the waves are reflected. The frequency of the reflected radar waves, which are reflected along the directions 12 back onto the sensor 2, are changed by the Doppler effect. However, the velocity V of the truck 4 plays only a minor role here, as the projection of the velocity V on the respective directions 12 is incorporated in the Doppler effect as radial velocity. In this case, it is clear that the radial velocity R1 of the waves that are reflected from the windscreen of the driver's cab 6 is considerably lower than the radial velocities R2 and R3 of the waves that are reflected from the container area 8 or the trailer 10.

[0042] FIG. 2 schematically depicts a section from the range-Doppler matrix. Three local maxima 14 can be recognized, which are surrounded by a zone of reflected energy. This is formed by the cells of the range-Doppler matrix that contain reflected energy and thus have a different coloration than white.

[0043] The three local maxima 14 can be recognized, which are removed from one another in both the vertical direction, i.e. in the range direction, and the horizontal direction, i.e. in the Doppler direction. This means that the three points of reflection to which the three local maxima 14 belong are at a different distance from the sensor 2 and have a different radial velocity.

REFERENCE LIST

[0044] 2 sensor

[0045] 4 truck

[0046] 6 driver's cab

[0047] 8 container area

[0048] 10 trailer

[0049] 12 direction

[0050] local minimum

[0051] V velocity

[0052] R1, R2, R3 radial velocity