EP3746806A1 - Procédé et dispositif destinés à commander plusieurs capteurs d'un véhicule - Google Patents

Procédé et dispositif destinés à commander plusieurs capteurs d'un véhicule

Info

Publication number
EP3746806A1
EP3746806A1 EP18811808.7A EP18811808A EP3746806A1 EP 3746806 A1 EP3746806 A1 EP 3746806A1 EP 18811808 A EP18811808 A EP 18811808A EP 3746806 A1 EP3746806 A1 EP 3746806A1
Authority
EP
European Patent Office
Prior art keywords
frequency
sensors
time
sub
gap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP18811808.7A
Other languages
German (de)
English (en)
Inventor
Stefan Heilmann
Michael Schoor
Stefan Engewald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3746806A1 publication Critical patent/EP3746806A1/fr
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/35—Details of non-pulse systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated 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
    • G01S13/343—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated 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 using sawtooth modulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/581—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of interrupted pulse modulated waves and based upon the Doppler effect resulting from movement of targets
    • G01S13/582—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of interrupted pulse modulated waves and based upon the Doppler effect resulting from movement of targets adapted for simultaneous range and velocity measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/87—Combinations of sonar systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S17/34—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/87—Combinations of systems using electromagnetic waves other than radio waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
    • G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
    • G01S7/0232—Avoidance by frequency multiplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0483—Transmitters with multiple parallel paths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S15/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
    • G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9316—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles combined with communication equipment with other vehicles or with base stations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9323—Alternative operation using light waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9324—Alternative operation using ultrasonic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9325—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles for inter-vehicle distance regulation, e.g. navigating in platoons
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9327—Sensor installation details
    • G01S2013/93271—Sensor installation details in the front of the vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9327—Sensor installation details
    • G01S2013/93272—Sensor installation details in the back of the vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9327—Sensor installation details
    • G01S2013/93274—Sensor installation details on the side of the vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/491—Details of non-pulse systems
    • G01S7/4911—Transmitters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/534—Details of non-pulse systems

Definitions

  • the invention relates to a method and a device for operating a plurality of sensors of a vehicle in at least partially spatial
  • a sensor can receive a foreign signal transmitted by a foreign sensor or its external echo, this external signal or external echo can superimpose and disturb a signal or echo of the sensor.
  • this external signal or external echo can superimpose and disturb a signal or echo of the sensor.
  • To avoid interference is the frequency spectrum of the electromagnetic waves in
  • Frequency bands are divided and the frequency bands are divided into channels.
  • Sensors of a vehicle can be operated in parallel on different channels. To operate several sensors of the vehicle on the same channel, the sensors can be aligned so that their
  • Detection areas lie on different sides of the vehicle or are aligned in different directions. Likewise, the sensors can send one after the other. A sensor begins to transmit when the previous sensor is finished with its modulation.
  • Embodiments of the present invention may advantageously allow, in the same detection area or in overlapping
  • a method for operating a plurality of sensors of a vehicle in at least partially spatially matching detection areas and a common frequency space
  • Receiving bandwidth of the sensors comprises, followed by the
  • each instantaneous frequency is blocked for the duration of a time gap for use by the sensors, wherein the time gap comprises at least one signal propagation time over a reception range of the sensors.
  • a sensor may be an active sensor that emits a signal and receives reflected echoes of the signal.
  • the signal may be a sound signal or an electromagnetic signal, such as a light signal or a radio signal.
  • the signal may be a radar signal. Over a period between issuing and receiving can be a distance to a
  • a frequency shift of the echo relative to the signal a relative speed of the object to the sensor can be determined.
  • a runtime difference can be a
  • the sensors can be similar.
  • the sensors are operated synchronized.
  • the sensors can emit signals in a common frequency space.
  • the frequency space is a section of a possible working range of the sensors.
  • the frequency space is determined by an upper limit frequency and a lower limit frequency.
  • the frequency space comprises a bandwidth of frequencies intended for use.
  • An instantaneous frequency is a frequency of the frequency space currently emitted or occupied by the sensor.
  • Instantaneous frequency is adjustable.
  • a frequency gap is a minimum required frequency separation between two for separating two signals
  • the minimum frequency gap to be maintained between two simultaneously emitted instantaneous frequencies is determined by the reception properties of the two simultaneously emitting sensors. While a sensor is tuned to a current frequency, it can be used with a frequency
  • the current instantaneous frequency can be located centrally in the reception bandwidth for a double-sideband receiver.
  • the frequency gap comprises at least one half of the frequencies of the reception bandwidth of one sensor and the other half of the
  • Instantaneous frequency may alternatively be at the edge of the receive bandwidth for a single-sideband receiver.
  • the frequency gap comprises at least the entire reception bandwidth of a sensor.
  • a time gap is a minimum time interval between two transmission times on the same frequency. The time gap is thus a time interval which is maintained at least until it is emitted again on a frequency. During the time gap, echoes are received on the frequency.
  • the time gap is at least so long that the signal can reach an object in a reception range and the echo of the signal reflected on the object can reach the sensor again.
  • the time gap is at least twice as long as the product of the Receive range and a propagation speed of the signal.
  • a maximum possible value of the reception range is determined by a maximum transmission power and a reception sensitivity of the sensor. A value used may be less than the maximum value.
  • One of the sensors can be used for one sub-modulation period in one
  • Submodulation time all frequencies of the sub-band can be sent at least once as instantaneous frequency.
  • the frequency space can be divided into several frequency ranges, so-called sub-frequency bands.
  • a sensor can be assigned a subfrequency band for a predetermined period of time, the so-called submodulation time duration.
  • the instantaneous frequency may be within the
  • Sub-frequency bands are set or modulated.
  • the sensor may be sequentially in different over a total modulation duration comprising several sub-modulation periods
  • Total modulation time periods can cover at least a majority of all frequencies contained in the frequency domain.
  • the sub-frequency bands can cover the entire frequency space.
  • the frequencies of the frequency domain can be processed piecewise.
  • Other sensors can simultaneously use the free sub-frequency bands at the same time.
  • the sub-frequency bands of the total modulation period may at least partially overlap.
  • the overlapping frequencies are transmitted several times in a total modulation period. These frequencies are thus sampled more often.
  • the sensors transmitting at a transmission time can transmit in different overlap-free partial frequency bands.
  • at least two of the sensors transmitting at a transmission time can transmit in at least partially overlapping partial frequency bands or the same partial frequency band.
  • one sensor can therefore transmit or several sensors can modulate within a subfrequency band.
  • Several sensors can be operated within a common sub-modulation period. These sensors then transmit the same frequency at least offset the time gap.
  • Subfrequency bands the available frequency space can be used well.
  • Two adjacent subfrequency bands may be spaced apart by a buffer frequency band.
  • Subfrequency bands offers an additional frequency spacing. Thus, a secure separation of the simultaneously transmitted signals and echoes can be achieved.
  • the frequencies of the buffer frequency band may be contained in one of the two adjacent sub-frequency bands overlapping, subsequently used sub-frequency band.
  • the sensor can send at least one frequency ramp sweeping over the subfrequency band within a submodulation time period.
  • a frequency ramp may have a predetermined slope.
  • the frequency ramp can be sent increasing or decreasing. Successive frequency ramps may have different slopes.
  • Subfrequency bands results in a maximum possible transmission duration of one
  • the frequency ramp can be made up of a variety of
  • the partial modulation periods of the sensors transmitting at a transmission time can start with a time delay. Due to the offset, a
  • the method may, for example, in software or hardware or in a hybrid of software and hardware, for example in a
  • the approach presented here also creates a device which is designed to execute, to control or to implement the steps of a variant of the method presented here in corresponding devices.
  • the device may be an electrical device having at least one computing unit for processing signals or data, at least one memory unit for Storing signals or data, and at least one interface and / or a communication interface for reading or outputting data embedded in a communication protocol.
  • the arithmetic unit can be, for example, a signal processor, a so-called system ASIC or a microcontroller for processing sensor signals and outputting
  • the storage unit may be, for example, a flash memory, an EPROM or a magnetic storage unit.
  • the interface can be used as a sensor interface for reading in the sensor signals from a sensor and / or as an actuator interface for
  • the communication interface can be designed to read in or output the data wirelessly and / or by cable.
  • Interfaces may also be software modules that are present, for example, on a microcontroller in addition to other software modules.
  • a computer program product or computer program with program code which can be stored on a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk memory or an optical memory and for carrying out, implementing and / or controlling the steps of the method according to one of the above
  • FIG. 1 shows a temporal representation of a frequency space in which a plurality of sensors are active at the same time according to an exemplary embodiment
  • FIG. 2 shows a representation of a synchronization of at least two sensors in the same frequency space according to an exemplary embodiment
  • FIG. 3 shows an illustration of a synchronization of a plurality of sensors according to an exemplary embodiment
  • FIG. 4 shows an illustration of a vehicle with a plurality of sensors and overlapping detection areas.
  • the approach presented here shows a method for the synchronization of several radar sensors in a sensor network. This results in a reduction of mutual interference of multiple sensors in a vehicle.
  • the probability of interference between the individual sensors is increasing.
  • the field of view of the sensors overlaps and the modulation time increases compared to the processing time or cycle time.
  • Interference arises from reflections on objects which are located in the field of vision of several sensors and on which the reflected power of individual sensors is superimposed.
  • the sensors can be modulated sequentially so that the modulation times do not overlap. Only as many sensors can be synchronized as a multiple of the modulation time fits into the cycle time.
  • Automotive used linear modulation is not at all times the full bandwidth is occupied. This makes it possible to synchronize multiple sensors nested. The number of interference free
  • Synchronizable sensors can be significantly increased according to the shape of the modulation.
  • the method described makes it possible, due to the characteristics of the modulation of automotive radar sensors, several sensors in one
  • the start of the modulation can be interleaved such that no overlapping of the transmitted ramps occurs.
  • the frequency space 100 shows a temporal representation of a frequency space 100 in which a plurality of sensors are active in each case at the same time according to an exemplary embodiment.
  • the sensors are radar sensors here. Therefore, the frequency space 100 is a small portion of an electromagnetic spectrum. If the
  • the frequency space 100 is a small section of an acoustic spectrum.
  • the frequency space 100 may be referred to as a frequency band or section of a frequency band.
  • the sensors are installed in a vehicle and have at least partially spatially matching detection areas, so that the sensors can receive signals and / or echoes of the other sensors. If one of the sensors receives a foreign signal or echo while it is ready to receive its own echo, falsified range values result.
  • At a transmission time t at least two of the sensors transmit at the same time to a frequency gap 102 separated instantaneous frequencies fl, f2.
  • the frequency gap 102 is thus between the instantaneous frequencies fl, f2 and comprises at least one instantaneous reception bandwidth 104 of at least one of the sensors.
  • the reception bandwidth 104 is thus smaller than or equal to the frequency gap 102.
  • the reception bandwidth 104 may comprise the upper half of the frequencies that the first sensor can receive while it is tuned to the first instantaneous frequency fl and may be the lower half of the frequencies include, which the second sensor can receive while being tuned to the second instantaneous frequency f2.
  • the frequency gap 102 may be the total receive bandwidth 104 of one of the
  • Sensors include when this sensor is a single sideband receiver.
  • the frequency gap 102 is greater than the receive bandwidth 104, the receivable frequencies are spaced apart by intervening non-receivable frequencies.
  • each used instantaneous frequency fl, f2 is blocked for the duration of a time gap 106 for use by the sensors.
  • the time gap 106 includes at least one signal propagation time 108 over a reception range of the sensors.
  • the signal propagation time 108 is therefore less than or equal to the time gap 106.
  • the maximum signal propagation time 108 is determined by the weakest signal or echo that can be evaluated by the sensors. In this case, the signal propagation time 108 can be greater with an increasing transmission power and / or an increasing sensitivity of the sensors.
  • the signal propagation time 108 may also be determined by a desired size of the
  • Detection area will be limited if objects outside the
  • the sensors are operated modulated within the frequency space 100.
  • the sensors send each other in chronological succession Transmission times on different instantaneous frequencies.
  • at least the rules described above are respected.
  • FIG. 2 shows a representation of a synchronization of at least two sensors in the same frequency space 100 according to the approach presented here.
  • the synchronization is essentially as in Fig. 1.
  • the frequency space 100 is here in at least four partially overlapping
  • Subfrequency bands 200 split.
  • each sensor sends its signal in one of the
  • Subfrequency bands 200 In at least two of the subfrequency bands 200 are transmitted in parallel. At a transmission time, at least two sensors each transmit at least through the frequency gap
  • An instantaneous frequency is in each case a component of one of the subfrequency bands 200. After being transmitted on an instantaneous frequency, the respective instantaneous frequency is not used for at least the duration of the time gap.
  • the partial frequency bands 200 used are each spaced apart by a buffer frequency band 204. In successive
  • a total modulation period 206 sends a sensor at least once in all sub-frequency bands 200.
  • the sensor within the total modulation period 206 transmits at least once on at least a majority of all frequencies of the frequency space 100.
  • the Total Modulation Time 206 four times as long as the Part Modulation Time 202.
  • the partial modulation period 202 is so long that the sensor has five frequency ramps 208 that follow each other directly within the
  • Submodulation time 202 sends.
  • the frequency ramps 208 may be sent in ascending and / or falling fashion.
  • the frequency ramps 208 are each offset by the time gap.
  • a subfrequency band 200 is here at least as wide as the receive bandwidth.
  • the next frequency ramp 208 starts immediately following the end of the preceding frequency ramp 208.
  • the frequency gap between two instantaneous frequencies is greater than the receive bandwidth.
  • three sensors are operated interleaved synchronized. There are always two of the sensors send in two different, due to the
  • Buffer frequency bands 204 of non-overlapping subfrequency bands 200 are provided.
  • one of the sensors for the total modulation period 206 After one of the sensors for the total modulation period 206 has sent at least once at substantially all frequencies of the frequency space 100, it does not transmit 202 for two sub-modulation durations 202 because one cycle period 210 includes six sub-modulation periods 202.
  • the three sensors start offset their total modulation periods 206 by two sub-modulation periods 202, respectively. This overlaps two of the
  • Total modulation time periods 206 each by two sub-modulation periods 202.
  • Fig. 2 A possible variation is shown in Fig. 2.
  • the ramps are divided into blocks, with one block sweeping only a portion of the bandwidth used. Due to the nature of the modulation, several sensors can be started in succession without the individual ramps or blocks overlapping in the frequency domain. The number of sensors depends on the parameters of the modulation, but is still greater than when the second sensor is started only after the end of the modulation of the first sensor. Conventionally, due to the ratio of the modulation time to the cycle time (> 0.5), no two sensors could be synchronized in the modulation scheme shown. However, interleaving allows three sensors to be synchronized without interferences.
  • FIG. 3 shows a representation of a synchronization of a plurality of sensors according to an exemplary embodiment.
  • the synchronization takes place essentially as in FIG. 1.
  • the sensors transmit here as in FIG. 2
  • Frequency ramps 208 are synchronized within a cycle period 210.
  • the frequency ramps 208 of the group are sent as close as possible nested within the total modulation period 206 of the three sensors.
  • Total modulation period 206 a first first frequency ramp 208 at one to send first first transmission time tl at the first instantaneous frequency fl.
  • a second of the sensors begins to transmit a first second frequency ramp 208 at a first second transmission time t2 offset by the time gap 106, likewise at the first instantaneous frequency fl.
  • the first sensor has reached the second instantaneous frequency f2 offset by the frequency gap 102 on its first first frequency ramp 208 at the first second transmission time t2.
  • a third of the sensors starts its first third frequency ramp 208 at the first instantaneous frequency f1.
  • the second sensor has at its first second frequency ramp 208 second instantaneous frequency f2 reached.
  • the first sensor transmits at the first third transmission time t3 on its first first first first first first third transmission time t3 on its first first first
  • Frequency ramp 208 on one by the frequency gap 102 to the second
  • the first first frequency ramp 208 ends when the third instantaneous frequency f3 is reached. Thereafter, the first sensor pauses for the duration of a time gap 106 to restart the sequence of frequency ramps 208 at a second first transmission time tl. Within the total modulation period 206, the sequence of the first, second and third frequency ramps 208 is repeated four times here. Upon expiration of the total modulation period 206, the sensors suspend 210 until the end of the cycle time.
  • Total modulation period 206 another total modulation period 300.
  • another group of three sensors is synchronized. At the beginning of the others
  • a first fifth frequency ramp 208 begins at a first fifth transmission time t5 offset by the time gap 106, also at the first instantaneous frequency fl.
  • the time gaps 106 can be of different lengths.
  • the fourth sensor has reached the second instantaneous frequency f2 on its first fourth frequency ramp 208 for the first fifth transmission time t5.
  • a sixth of the sensors starts its first sixth frequency ramp 208 during the first instantaneous frequency fl.
  • the fifth sensor on its first fifth frequency ramp 208 has the second one
  • the fourth sensor has reached the third instantaneous frequency f3 on the first fourth frequency ramp 208 at the first sixth transmission time t6.
  • the first fourth frequency ramp 208 ends here as well when reaching the third instantaneous frequency f3. Thereafter, the fourth sensor pauses for the duration of a time gap 106 to restart the sequence of frequency ramps 208 at a second fourth transmission time t4.
  • Total modulation period 300 the sequence of the fourth, fifth and sixth frequency ramps 208 is also repeated four times.
  • the sequence here begins again with a first first frequency ramp 208 of the first sensor at a first first transmission time t 1 and the first instantaneous frequency f 1.
  • FIG. 3 shows a detail of a modulation as in FIG. 2.
  • a frequency range of the frequency ramps 208 corresponds to a frequency range of one of the subfrequency bands 200.
  • the complete frequency space is not shown and, as in FIG. 2, comprises at least one further subfrequency band higher or lower frequencies.
  • the further subfrequency band can be with or without frequency spacing through the buffer frequency band above or below the one shown here
  • Partial frequency bands 200 may be arranged. If the further subfrequency band directly adjoins the higher or lower frequencies, no overlapping by further subfrequency bands as in FIG. 2 is required.
  • the total modulation time period 206 for transmitting the first, second and third frequency ramps 208 corresponds to a submodulation time duration 202 as in FIG. 2.
  • the further total modulation time duration 300 for transmitting the fourth, fifth and sixth frequency ramps 208 corresponds to a further submodulation time duration 202. At least a majority of all
  • Figures 2 and 3 show waveforms of several sensors of a vehicle operated in a common frequency space become.
  • the sensors are operated modulated in frequency ramps 208 and have at least partially spatially overlapping detection ranges.
  • a first of the sensors transmits at a first instantaneous frequency fl of a first frequency ramp 208, while at least a second of the sensors transmits at the same time at a second instantaneous frequency f2 of a second frequency ramp 208.
  • the first instantaneous frequency fl and the second instantaneous frequency f2 are at least spaced from each other by the frequency gap 102.
  • the same instantaneous frequency fl contained in two successive frequency ramps 208 is sent at least by the time gap 106 with a time delay.
  • Instantaneous frequencies f1, f2 of the frequency ramps 208 are at least spaced from one another by the frequency gap 102.
  • An instantaneous frequency f 1 contained in two successive frequency ramps 208 is sent at least by the time gap 106 with a time delay.
  • FIG. 3 Another possible variation is shown in FIG. 3. In this variant, interleaving of individual ramps of different sensors takes place
  • the ramps of the sensors are nested so that they do not overlap.
  • the times between the sensors are chosen so that the reflections of distant objects do not fall within the field of view of another sensor.
  • additional sensors can be interleaved in the pause between the end of the modulation and the start of the new cycle.
  • the sensors are tuned to one another in a time-finer grid than in the variant described above.
  • the decisive advantage is that the approach presented here results in the greatest possible number of interference-free synchronisable sensors.
  • the sensors can be operated with linear ramps and the same modulation of the synchronized sensors.
  • FIG. 4 shows an illustration of a vehicle 400 with a plurality of sensors 402 and overlapping detection areas 404.
  • the vehicle 400 points here seven active sensors 402 which transmit in the same frequency space.
  • the vehicle 400 may include other active sensors that may be in other
  • the vehicle 400 may include passive sensors.
  • the vehicle 400 has three sensors 402 in the front area, one sensor each on the sides and two sensors in the rear area. Each at least two of the detection areas 404 overlap at least partially. Two immediately adjacent sensors 402 with overlapping detection areas 404 send in the approach presented here as described in the preceding figures at different transmission times, which are offset by at least the time gap to each other and / or with different
  • Sensors 402 having non-overlapping detection regions 404 may transmit at the same instantaneous frequency at the same time of transmission.
  • Sensors 402 oriented in opposite directions on the vehicle 400 such as the front-right sensor 402 and the rear-left sensor 402, the front-left sensor 402, and the rear-right sensor 402, may also communicate therewith at the same time of transmission
  • Sensors 402 which have no or very small overlapping viewing area, ie sensors 402 which are e.g. front left and right rear in
  • Vehicle 400 are installed, can continue to operate in parallel.
  • FIG. 4 shows by way of example how sensors 402 in a vehicle 400 can be synchronized with the method presented here.
  • seven sensors 402 are synchronized by means of three synchronization times. As can be seen from the figure, can through the

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

La présente invention concerne un procédé destiné à commander plusieurs capteurs (402) d'un véhicule (400) dans des zones de détection (404), coïncidant au moins partiellement dans l'espace, et dans un espace de fréquence (100) commun, lequel procédé est caractérisé en ce que, à un instant d'émission (t) au moins deux des capteurs (402) émettent simultanément sur des fréquences instantanées (f1, f2) séparées par un intervalle de fréquence (102), l'intervalle de fréquence (102) comprenant au moins une largeur de bande de réception instantanée (104) des capteurs (402), chaque fréquence instantanée (f1, f2) étant verrouillée à la suite de l'instant d'émission (t) pour la durée d'un intervalle de temps (106) pour une utilisation par les capteurs (402), l'intervalle de temps (106) comprenant au moins un délai de propagation de signal (108) sur une portée de réception des capteurs (402).
EP18811808.7A 2018-01-29 2018-11-30 Procédé et dispositif destinés à commander plusieurs capteurs d'un véhicule Pending EP3746806A1 (fr)

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DE102018201303.9A DE102018201303A1 (de) 2018-01-29 2018-01-29 Verfahren und Vorrichtung zum Betreiben von mehreren Sensoren eines Fahrzeugs
PCT/EP2018/083110 WO2019145072A1 (fr) 2018-01-29 2018-11-30 Procédé et dispositif destinés à commander plusieurs capteurs d'un véhicule

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EP (1) EP3746806A1 (fr)
JP (1) JP7078731B2 (fr)
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JP7078731B2 (ja) 2022-05-31
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KR20200111768A (ko) 2020-09-29
CN111656210A (zh) 2020-09-11
DE102018201303A1 (de) 2019-08-01
KR102682267B1 (ko) 2024-07-10
CN111656210B (zh) 2024-07-09
US11460539B2 (en) 2022-10-04

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