Method for operating a surroundings-detection system of a vehicle

Patent metadata

Field	Value
Publication number	US-2016154104-A1
Application number	US-201414900340-A
Country	US
Kind code	A1
Filing date	Apr 8, 2014
Priority date	Jun 21, 2013
Publication date	Jun 2, 2016
Grant date	—

Abstract

A method for operating a surroundings-detection system of a vehicle includes at least one transceiver unit emitting a frequency-modulated signal and receiving echo signals of the emitted frequency-modulated signal. The received echo signals are associated with reflection sources, and a piece of information about the speed of the reflection source relative to the transceiver unit is ascertained on the basis of the received echo signals.

First claim

1 - 10 . (canceled)

11 . A method for operating a surroundings-detection system of a vehicle including at least one transceiver unit, the method comprising:
emitting, by the at least one transceiver unit, a frequency-modulated signal; receiving, by the at least one transceiver unit, echo signals of the emitted frequency-modulated signal, wherein the emitted frequency-modulated signal includes one of (i) at least one first section having increasing frequencies and at least one second section having decreasing frequencies, or (ii) at least one first section having decreasing frequencies and at least one second section having increasing frequencies, and wherein the received echo signals are associated with at least one reflection source; and ascertaining information about the speed of the at least one reflection source relative to the transceiver unit on the basis of the received echo signals.

12 . The method as recited in claim 11 , wherein the emitted frequency-modulated signal has a pulse duration of 0.6 ms to 3 ms.

13 . The method as recited in claim 11 , wherein the emitted frequency-modulated signal includes one of (i) a linear chirp-up followed by a linear chirp-down, (ii) a logarithmic chirp-up followed by a logarithmic chirp-down, (iii) a linear chirp-down followed by a linear chirp-up, or (iv) a logarithmic chirp-down followed by a logarithmic chirp-up.

14 . The method as recited in claim 13 , wherein the received echo signals are passed through at least one first finite impulse response (FIR) filter device having a first FIR signal, and one first point in time of best correlation of the received echo signals with the first FIR signal is ascertained.

15 . The method as recited in claim 14 , wherein the received echo signals are passed through at least one second FIR filter device having a second FIR signal, and a second point in time of best correlation of the received echo signals with the second FIR signal is ascertained.

16 . The method as recited in claim 15 , wherein a time difference is ascertained on the basis of the ascertained first and second points in time of best correlation, and the information about the speed of the at least one reflection source relative to the transceiver unit is ascertained on the basis of the ascertained time difference using a linear approach.

17 . A non-transitory, computer-readable data storage medium storing a computer program having program codes which, when executed on a computer, perform a method for operating a surroundings-detection system of a vehicle including at least one transceiver unit, the method comprising:
emitting, by the at least one transceiver unit, a frequency-modulated signal; receiving, by the at least one transceiver unit, echo signals of the emitted frequency-modulated signal, wherein the emitted frequency-modulated signal includes one of (i) at least one first section having increasing frequencies and at least one second section having decreasing frequencies, or (ii) at least one first section having decreasing frequencies and at least one second section having increasing frequencies, and wherein the received echo signals are associated with at least one reflection source; and ascertaining information about the speed of the at least one reflection source relative to the transceiver unit on the basis of the received echo signals.

18 . A surroundings-detection system of a vehicle, comprising:
at least one transceiver unit configured to emit a frequency-modulated signal and receive echo signals of the emitted frequency-modulated signal, wherein the emitted frequency-modulated signal includes one of (i) at least one first section having increasing frequencies and at least one second section having decreasing frequencies, or (ii) at least one first section having decreasing frequencies and at least one second section having increasing frequencies; and a filter device coupled to the at least one transceiver unit and configured to (i) filter the received echo signals which are passed through the filter device, (ii) associate the received echo signals with at least one reflection source, and (iii) ascertain an information about the speed of the reflection source relative to the transceiver unit on the basis of the received echo signals.

19 . The surroundings-detection system as recited in claim 18 , wherein the filter device includes at least one FIR filter device.

Assignees

• Bosch Gmbh Robert

Inventors

• Schumann Michael
• Schneider Marcus
• Schmid Dirk

Classifications

• G01S13/536

  using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves · CPC title

• G01S2013/9314

  Parking operations · CPC title

• G01S17/34

  using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal · CPC title

• G01S13/345

  using triangular modulation · CPC title

• G01S15/582 Primary

  using transmission of interrupted pulse-modulated waves and based upon the Doppler effect resulting from movement of targets · CPC title