EP4196819A1 - Verfahren zum betreiben einer berührungslos arbeitenden detektionsvorrichtung zur überwachung wenigstes eines überwachungsbereichs, detektionsvorrichtung und fahrzeug mit wenigstens einer detektionsvorrichtung - Google Patents
Verfahren zum betreiben einer berührungslos arbeitenden detektionsvorrichtung zur überwachung wenigstes eines überwachungsbereichs, detektionsvorrichtung und fahrzeug mit wenigstens einer detektionsvorrichtungInfo
- Publication number
- EP4196819A1 EP4196819A1 EP21752686.2A EP21752686A EP4196819A1 EP 4196819 A1 EP4196819 A1 EP 4196819A1 EP 21752686 A EP21752686 A EP 21752686A EP 4196819 A1 EP4196819 A1 EP 4196819A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signals
- received
- detection device
- received signal
- assigned
- 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
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 101
- 238000012544 monitoring process Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 76
- 238000011156 evaluation Methods 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 16
- 230000009466 transformation Effects 0.000 claims description 22
- 238000012806 monitoring device Methods 0.000 claims description 3
- 230000036387 respiratory rate Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- 238000000844 transformation Methods 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 108010076504 Protein Sorting Signals Proteins 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
- B60R21/01512—Passenger detection systems
- B60R21/0153—Passenger detection systems using field detection presence sensors
- B60R21/01534—Passenger detection systems using field detection presence sensors using electromagneticwaves, e.g. infrared
-
- 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
- G01S13/04—Systems determining presence of a target
-
- 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
- G01S13/62—Sense-of-movement determination
-
- 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
- G01S13/86—Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
- G01S13/865—Combination of radar systems with lidar 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
- 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
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/288—Coherent receivers
- G01S7/2883—Coherent receivers using FFT processing
-
- 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
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/292—Extracting wanted echo-signals
- G01S7/2923—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods
-
- 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
- G01S7/352—Receivers
- G01S7/356—Receivers involving particularities of FFT processing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2420/00—Indexing codes relating to the type of sensors based on the principle of their operation
- B60W2420/40—Photo, light or radio wave sensitive means, e.g. infrared sensors
- B60W2420/408—Radar; Laser, e.g. lidar
Definitions
- the invention relates to a method for operating a non-contact detection device for monitoring at least one monitoring area, in which a large number of transmission signals are sent one after the other into at least one monitoring area,
- Transmitted signals which are reflected in the at least one monitoring area, are received with the detection device, if necessary, are brought into a form that can be processed with an evaluation device, and are processed as received signals, with at least some of the signals being assigned to at least one signal block and information about the at least one monitoring area is determined from at least some of the received signals.
- the invention also relates to a non-contact detection device for monitoring at least one monitoring area, with at least one transmission device for transmitting a large number of transmission signals one after the other into the at least one monitoring area, with at least one receiving device for receiving transmission signals which are reflected in the at least one monitoring area, and for converting the received transmitted signals into received signals which can be processed with an electrical evaluation device, and with at least one electronic evaluation device for assigning at least some of the signals to at least one signal block and for determining information about the at least one monitoring area from at least some of the received signals .
- the invention relates to a vehicle with at least one non-contact detection device for monitoring a monitored area for objects, the at least one detection device having at least one transmitting device for transmitting a large number of transmitted signals one after the other into the at least one monitoring area, at least one receiving device for receiving transmitted signals which are reflected in the at least one monitored area and for converting the received transmitted signals into received signals which can be processed with an electrical evaluation device , and at least one electronic evaluation device for assigning at least some of the signals to at least one signal block and for determining information about the at least one monitoring area from at least some of the received signals.
- an FMCW (Frequency Modulated Continuous Wave) radar system which includes a chirp profile storage component configured to store a chirp profile for each chirp of a chirp block, and a timing engine coupled to the chirp profile storage component to receive each chirp profile in transmission order during transmission of the chirp block, the timing engine using each chirp profile to configure a corresponding chirp.
- a chirp profile storage component configured to store a chirp profile for each chirp of a chirp block
- a timing engine coupled to the chirp profile storage component to receive each chirp profile in transmission order during transmission of the chirp block, the timing engine using each chirp profile to configure a corresponding chirp.
- the invention is based on the object of designing a method, a contactless detection device and a vehicle of the type mentioned above, in which the monitoring of at least one monitoring area can be improved, in particular the signal processing of the received signals can be improved.
- this object is achieved in the method in that at least one part of received signals that follow one another in time on the receiving side of the detection device is assigned to at least one received signal block, the assignment being independent of any assignments of transmitted signals on the transmitting side of the detection device, at least one Part of the received signals of at least part of the received signal blocks is subjected to signal processing in blocks, with which information about the at least one monitoring area is determined.
- the received signals are assigned to corresponding received signal blocks on the receiving side.
- the received signals are signal-processed in blocks, ie for each or at least a part of the received signal blocks. The signal processing therefore takes place from received signal block to received signal block.
- the received signal blocks can be structured more flexibly. It is not necessary to adapt the reception signal blocks to any assignment on the transmission side. In particular, the transmission signals can simply be transmitted continuously in the same way. Advantageously, no assignment of transmission signals to signal blocks is carried out on the transmitter side. Overall, the signal processing can be carried out more flexibly. The signal processing can take place in parallel with the reception of the reflected transmission signals and, if necessary, their conversion into a suitable signal form. It is not necessary for the received signal blocks to have fixed sizes, in particular time windows with fixed time lengths.
- the received signals can be transmitted continuously at a certain defined transmission rate and assigned to the received signal blocks.
- the receive signal blocks can be defined as required on the receive side.
- the reflected transmission signals can, if necessary, be brought into a form that can be processed with an evaluation device. If the reflected transmitted signals already have a form that can be processed with the evaluation device, the reflected received transmitted signals can be further processed directly as received signals. Otherwise, the reflected transmission signals are converted into a form that can be processed with the evaluation device.
- the reflected, received transmission signals can advantageously be converted into electrical reception signals, which can be processed with a corresponding electrical evaluation device.
- transmission signals can also be used in a form that cannot be directly processed electrically.
- electromagnetic signals can be used as transmission signals, in particular radar signals or optical signals, or sound signals or the like, are used and converted into electrical reception signals on the receiving side.
- the detection device can be used to determine distances and/or speeds and/or directions of objects relative to the detection device.
- the received signal blocks can be adjusted very flexibly on the receiving side.
- At least one of the received signals can be assigned to at least two temporally overlapping received signal blocks and/or at least one received signal can be assigned to a time gap between at least two consecutive received signal blocks.
- an update rate can be increased during detection. Longer measuring times and higher resolutions, in particular speed resolution, in particular Doppler resolution, can thus be made possible. Higher detection update rates can allow better and more reliable tracking of targets.
- Overlapping reception signal blocks can be used in particular in detection devices that are used in connection with driver assistance systems of vehicles. In this way, in particular, detection of the surroundings in a monitoring area in the vicinity of the vehicle can be improved.
- the time in the time gap can be used for signal processing. Furthermore, storage space can be saved in the signal processing in this way.
- At least two received signal blocks can be assigned the same number of received signals and/or at least two received signal blocks can be assigned the same time length and/or at least two received signal blocks can be assigned a different number of received signals and/or at least two receive -Signal blocks can be assigned different time lengths.
- the received signal blocks can be made uniform overall.
- the received signal blocks can advantageously have the same time length. In this way, the received signal blocks can be compared more easily with regard to their time profile. If the received signals have the same time length, given the same time length of the received signal blocks, each received signal block can be assigned the same number of received signals.
- the received signal blocks can be configured more flexibly. At least two of the received signal blocks can advantageously be assigned different time lengths. In this way, longer or shorter measurements can be carried out as required.
- At least part of the received signals can be assigned to at least one received signal block, which are also assigned to at least one other received signal block, which has a time length that is shorter than the length of the at least one first-mentioned received signal blocks.
- at least part of the received signals can be assigned to at least one received signal block, which are also assigned to at least two other received signal blocks that have a time length that is shorter than the length of the at least one first-mentioned received signal block.
- a longer-term initial signal block overlap at least one, in particular at least two, temporally shorter received signal blocks.
- different resolutions can be achieved in the processing of the correspondingly assigned received signals with received signal blocks of different lengths over time.
- all received signals that are in a time window of at least one received signal block can be assigned to this at least one received signal block without gaps - and/or at least some of the received signals that are in a time window of at least one receive -Signal blocks are located, can be omitted in the assignment to this at least one reception signal block.
- the uninterrupted assignment of all received signals in the corresponding time window means that greater accuracy can be achieved when determining the information about the at least one monitoring area.
- At least some of the received signals can advantageously be omitted regularly or irregularly in the time window of the at least one received signal block. In this way, the received signals can be assigned even more flexibly to the corresponding received signal blocks.
- At least some of the transmission signals can be transmitted in the form of electromagnetic signals.
- a monitoring area can be monitored without contact.
- At least some of the transmission signals can advantageously be transmitted in the form of radar signals.
- the radar signals can be transmitted in the form of so-called chips.
- chirp is a signal whose frequency changes over time.
- the frequency curve of a chirp can be displayed as a frequency ramp.
- the detection device can be a frequency modulated continuous wave (FMCW) radar.
- FMCW frequency modulated continuous wave
- the surveillance area can be continuously monitored.
- the invention can also be used with other types of non-contact detection devices instead of in connection with radar systems.
- the invention can advantageously be used in other types of electromagnetic detection devices, in particular optical detection devices, or ultrasonic detection devices or the like.
- the transmission signals and the corresponding reception signals can be implemented as corresponding signal sequences, pulses or the like.
- the same transmission signals can be transmitted evenly over time and/or the same transmission signals can be transmitted unevenly over time and/or different transmission signals can be transmitted evenly over time and/or different transmission signals can be transmitted unevenly over time.
- transmission signals and transmission patterns can be generated flexibly.
- the transmission signals can also be coded in this way.
- different transmission signals can be transmitted simultaneously with one or more transmission devices, which can be distinguished from one another when received on the receiving side with one or more reception devices.
- the invention can also be used in the so-called MI MO radar system.
- at least a portion of the received signals corresponding to the received signal blocks can be subjected to at least one Fourier transformation in blocks.
- the received signals can be subjected to at least one discrete Fourier transformation, received signal block by received signal block.
- the results of a first discrete Fourier transformation for the received signal blocks can advantageously be subjected to a further discrete Fourier transformation.
- the received signals can be subjected overall to a two-dimensional discrete Fourier transformation.
- Distances, speeds and/or directions of object targets relative to the detection device can be determined as information about the monitoring area from the result of the at least one two-dimensional discrete Fourier transformation.
- At least one discrete Fourier transformation can advantageously be carried out as fast Fourier transformations. In this way, the at least one Fourier transformation can be calculated more efficiently.
- the detection device can be used to monitor an interior of a vehicle and/or the detection device can be used to record the surroundings of a vehicle.
- the detection device can advantageously be designed for monitoring the interior of a vehicle.
- the detection device can be designed to detect the surroundings of a vehicle.
- the detection device can be used to detect stationary or moving object targets, in particular object targets of vehicles, people, animals, obstacles, bumps in the road, in particular potholes or stones, road boundaries, free spaces, in particular parking spaces, precipitation or the like, are detected.
- an object target can be parts of an object, in particular body parts of a person, on which the transmission signals can be reflected.
- an occupant detection, a movement detection, in particular a respiratory rate detection and/or a respiratory profile detection, or the like can be carried out.
- movements of people, in particular a driver can be detected.
- breathing-related chest movements, movement of the arms, the head or the like can be monitored.
- the detection device, in particular the assignment of received signal blocks can be flexibly adapted to the requirements.
- chest movements related to breathing can be slow compared to arm movements and therefore require a higher resolution in terms of update rate.
- the received signals can be assigned to different received signal blocks with different time lengths.
- the invention can also be used in connection with means for a seat belt reminder.
- the invention can be used in a vehicle, in particular a motor vehicle.
- the invention can advantageously be used in a land vehicle, in particular a passenger car, a truck, a bus, a motorcycle or the like, an aircraft and/or a watercraft.
- the invention can also be used in vehicles that can be operated autonomously or at least partially autonomously.
- the invention can be used in connection with detection devices in stationary operation.
- At least part of the determined information about the monitoring area can be transmitted to a control device of a vehicle to which the detection device is assigned.
- the information determined can be used to operate the vehicle.
- the detection device can advantageously be connected to at least one electronic control device of the vehicle, in particular a driver assistance system and/or chassis control and/or a driver information device and/or a parking assistance system and/or gesture recognition or the like, or be part of such. In this way, at least partially autonomous operation of the vehicle can be made possible.
- the object is achieved according to the invention with the detection device in that the detection device has means for carrying out the method according to the invention. In this way, the monitoring of at least one monitoring area can be improved.
- At least part of the means of the detection device for carrying out the method according to the invention can be implemented in software and/or hardware. In this way, the funds can be adjusted according to the needs.
- At least some of the means of the detection device for carrying out the method according to the invention can be implemented with the at least one evaluation device.
- the detection device can have at least one transmission device, with which electromagnetic transmission signals can be transmitted, and at least one reception device, with which reflected electromagnetic transmission signals can be received and possibly converted.
- a monitoring area can be monitored without contact using electromagnetic transmission signals.
- the detection device can be a radar system.
- a radar system can be used in particular in vehicles.
- the detection device can be an optical detection device, an ultrasonic detection device or the like.
- the object is achieved according to the invention in the vehicle in that the vehicle has at least one detection device according to the invention.
- the vehicle can have a plurality of detection devices that also work in different ways in a non-contact manner. In this way, different monitoring areas can be monitored outside and/or inside the vehicle.
- At least one detection device can be an environment detection device and/or one detection device can be at least one interior space monitoring device.
- the surroundings of the vehicle can be monitored with a surroundings detection device.
- An interior of the vehicle can be monitored with an interior monitoring device.
- FIG. 1 shows a passenger car which has a surroundings detection radar system, an interior monitoring radar system and a driver assistance system
- FIG. 2 shows, in a frequency-time diagram, interior transmission signals which are transmitted with the interior surveillance radar system into the interior of the passenger car from FIG. 1;
- FIG. 3 shows interior reception signals in a frequency-time diagram, which originate from interior transmission signals from FIG. 2 and are reflected by a person in the interior of the passenger car from FIG. 1, the interior reception signals being assigned to reception signal blocks;
- FIG. 4 shows, in a frequency-time diagram, surrounding reception signals which originate from surrounding transmission signals which are reflected by objects in the surrounding area of the passenger car from FIG. 1, the surrounding receiving signals being assigned to receiving signal blocks.
- a vehicle 10 in the form of a passenger car is shown schematically in a side view.
- the vehicle 10 includes, for example, two contactless detection devices in the form of radar systems, namely an interior monitoring radar system 12 and an environment detection radar system 14.
- the vehicle 10 also includes a driver assistance system 16.
- the interior surveillance radar system 12 is directed to an interior surveillance area 18 a in the interior of the vehicle 10 .
- the interior monitoring area 18a can be monitored with the interior monitoring radar system 12 .
- the interior monitoring radar system 12 can be used to detect occupants of the vehicle 10 . For example, movements of a person 20a located in the interior monitoring area 18a, for example breathing-related movements of the chest, or movements of the head or the arms, can be detected. By detecting the movement of the chest, for example, a respiratory rate can be detected.
- other interior surveillance radar systems that are also oriented differently can be provided.
- Surroundings detection radar system 14 is directed into a surrounding area monitoring area 18b in front of vehicle 10 in the direction of travel of vehicle 10 .
- the surroundings monitoring area 18b can be monitored for objects 20b with the surroundings detection radar system 14 .
- the surroundings detection radar system 14 can be used to detect stationary or moving objects 18b, for example vehicles, people, animals, obstacles, bumps in the road, in particular potholes or stones, road boundaries, free spaces, in particular parking spaces, precipitation or the like.
- stationary or moving objects 18b for example vehicles, people, animals, obstacles, bumps in the road, in particular potholes or stones, road boundaries, free spaces, in particular parking spaces, precipitation or the like.
- the interior monitoring radar system 12 and the surroundings detection radar system 14 are each connected to the driver assistance system 16 .
- the vehicle 10 can be operated autonomously or partially autonomously with the driver assistance system 16 .
- different functions of the vehicle 10 can be influenced with the driver assistance system 16 .
- the driver assistance system 16 can also have means for detecting an occupant and detecting a respiratory rate based on information about the interior monitoring area 18a.
- the interior surveillance radar system 12 can be connected to another control device, which can have means for detecting an occupant and detecting a respiratory rate.
- the interior surveillance radar system 12 and the environment detection radar system 14 are each designed as a frequency-modulated continuous-wave radar.
- Frequency-modulated continuous wave radars are also referred to in technical circles as FMCW (frequency modulated continuous wave) radars.
- the interior surveillance radar system 12 has, for example, an interior transmission device 22a.
- the interior transmission device 22a transmits interior transmission signals 22a in the form of so-called chirps into the interior monitoring area 18a.
- the interior transmission signals 22a are the same, for example, and are transmitted evenly.
- FIG 2 is an example of a frequency-time diagram of the interior transmission signals 24a shown with the interior transmission device 22a of the interior monitoring tion radar system 12 are sent.
- the interior transmit signals 24a are shown as frequency ramps.
- the interior monitoring radar system 12 also has an interior receiving device 28a, for example. With the interior receiving device 28a, interior transmission signals 24a, which are reflected in the interior monitoring area 18a, for example on the person 20a, are received and converted into electrical interior reception signals 26a. The electrical interior reception signals 26a are transmitted to an electronic interior control and evaluation device 30a of the interior surveillance radar system 12 .
- the interior reception signals 26a are signal-processed with the interior control and evaluation device 30a.
- the interior control and evaluation device 30a has means in the form of software and hardware.
- the interior control and evaluation device 30a is used to determine interior information about the interior monitoring area 18a from the received signals 26a.
- the person 20a in the interior of the vehicle 10 can be recognized in this way.
- movements of the chest of the person 20a for example, can be determined as interior information and a respiratory rate can be determined therefrom.
- the interior information about the interior monitoring area 18a is transmitted to the driver assistance system 16 .
- the driver assistance system 16 corresponding functions of the vehicle 10, for example driving functions, warnings or the like, are influenced on the basis of the interior information.
- Surroundings detection radar system 14 has, by way of example, surrounding transmission devices 22b. Surroundings transmission signals 24b in the form of radar signals, for example chirps, are sent into the surroundings monitoring area 18b with the surroundings transmission device 22b.
- the environment transmission signals 24b have the same form and arrangement as the interior transmission signals 24a, for example. Alternatively, different transmission signals can also be used with the surroundings detection radar system 14 and with the interior monitoring radar system 12 .
- Surroundings detection radar system 14 also has, by way of example, a surroundings receiving device 28b. Surroundings transmission signals 24b, which are reflected in surroundings monitoring area 18b, for example on an object 20b, are received with surroundings-receiving device 28b and converted into electric surroundings-receiving signals 26b. The electrical environment reception signals 26b are transmitted to an environment control and evaluation device 30b of the environment detection radar system 14 .
- the environment received signals 26 b are signal-processed.
- the environment control and evaluation device 30b has means in the form of software and hardware.
- Surrounding information about the surrounding area monitored area 18b is determined from the surrounding received signals 26b and transmitted to the driver assistance system 16 .
- the surroundings information is, for example, object information of the object 20b, for example a distance, a speed and/or a direction of the object 20b relative to the surroundings detection radar system 14.
- corresponding functions of the vehicle 10 for example driving functions, warnings or the like, can be influenced on the basis of the environmental information.
- the interior reception signals 26a For processing the electrical interior reception signals 26a with the interior control and evaluation device 30a, the interior reception signals 26a, as shown in FIG 32b and third receive signal blocks 32c.
- the first received signal blocks 32a each include a time window 34a with the same time length.
- Each interior reception signal 26a which is in the time window 34a of a corresponding first reception signal block 32a, is assigned to this first reception signal block 32a.
- the time windows 34a of the first reception signal blocks 32a for example, there are three of the interior reception signals 26a.
- An optional gap 36a is maintained in each case between the first receive signal blocks 32a.
- the time length of the gaps 36a can correspond to the time length of an interior reception signal 26a.
- the interior reception signals 26a in the gaps 36a between two consecutive first reception signal blocks 32a can be assigned, for example, to none of the two said reception signal blocks 32a.
- the time length of the second reception signal blocks 32b corresponds to a time window 34b.
- the time lengths of the second time window 34b correspond, for example, to the total time length of two of the first received signal blocks 32a, ie the time length of two first time windows 34a, plus the gap 36a in between.
- seven of the interior reception signals 26a lie in the time windows 34b of the second reception signal blocks 32b.
- Each of the second reception signal blocks 32b temporally overlaps two of the first reception signal blocks 32a. Furthermore, two second received signal blocks 32b that follow one another directly in terms of time overlap in a time period that corresponds to the time length of the time window 34a of the first received signal blocks 32a.
- the interior reception signals 26a, which are also assigned to the overlapping first reception signal blocks 32a, and the interior reception signals 26a in the gaps 36a are assigned to the second reception signal blocks 32b.
- the third reception signal blocks 32c each have the length of a third time window 34c.
- the third reception signal blocks 32c begin with the example Start of a second reception signal block 32b and ends with the end of the following second reception signal block 32b. In this way, each of the third reception signal blocks 32c overlaps two of the second reception signal blocks 32b.
- each of the third receive signal blocks 32c is every fourth of the interior receive signals 26a, which are also assigned to the two second receive signal blocks 32b which are overlapped by the corresponding third receive signal block 32c. Because only every fourth interior reception signal 26a is assigned to the third reception signal blocks 32c, the memory requirements for signal processing are reduced. The update rate during detection is increased by the corresponding overlaps of the third received signal blocks 32c.
- Different resolutions are achieved due to the time windows 34a, 34b and 34c of different lengths. In this way, both fast and slow movements can be determined in parallel using the method according to the invention.
- the highest resolution is achieved with the long time windows 34c of the third receive signal blocks 32c.
- Slow movements can be captured with this resolution. For example, chest movements of the person 20a can be detected to measure the respiratory rate. Rapid movements, for example rapid arm movements by person 22a, can be detected with the shorter first reception signal blocks 32a.
- reception signal blocks 32a with correspondingly longer time windows 32c are occasionally activated in order to monitor the respiratory rate of the person 20a, for which a correspondingly high resolution is required.
- reception Signal blocks 32b with shorter time windows 34b are used to monitor the interior of the vehicle 10, for example for occupant detection.
- the interior reception signals 26a are each subjected to a fast Fourier transformation in blocks for all first reception signal blocks 32a, all second reception signal blocks 32b and all third reception signal blocks 32c.
- the results of the fast Fourier transformations for the first received signal blocks 32a are then subjected to a further fast Fourier transformation.
- the results of the fast Fourier transformation for the second received signal blocks 32b are subjected to a corresponding further fast Fourier transformation.
- the results of the fast Fourier transformation for the third received signal blocks 32c are subjected to a corresponding further fast Fourier transformation.
- the results of the second fast Fourier transformations are used to determine the interior information about the interior surveillance area 18a, or to determine movements of the person 20a.
- the environment reception signals 26b are assigned to reception signal blocks 32d, as shown in FIG.
- the received signal blocks 32d which are used in the surroundings detection radar system 14, each include a time window 34d.
- the time windows 34d of the reception signal blocks 32d have the same time length.
- Receive signal blocks 32d following one another in time overlap, for example, in each case over part of their time length. Furthermore, each received signal block 32d overlaps with the preceding received signal block 32d, for example. In addition, each received signal block 32d overlaps, for example, with a received signal block 32d in front of the preceding received signal block 32d. In the exemplary structure of the reception signal blocks 32d, four reception signal blocks 32d following one another in time therefore overlap in each case. Each received signal 26b which is in a time window 34d of one of the received signal blocks 32d is assigned to this received signal block 32d. In this way, some received signals 26b are assigned to up to four received signal blocks 32d, for example.
- the received signals 36b are each subjected to a fast Fourier transformation in blocks from received signal block 32d to received signal block 32d.
- the results of the fast Fourier transformation of the received signal blocks 32d are then subjected to a further fast Fourier transformation.
- information about the surroundings is determined about the area to be monitored 18b, for example about the object 20b.
- a distance, a speed and a direction of the detected object 20b relative to the vehicle 10 can be determined as object information.
- the relative speed can be determined from a Doppler shift in the surroundings reception signal 26b.
- reception signal blocks 32 other than those described and also of different lengths can also be specified in different overlaps and/or distances for signal processing. Due to the fact that the transmission signals 24 are sent out continuously on the transmission side and the assignment to the reception signal blocks 32 only takes place on the reception side, the reception Signal blocks 32 are adjusted as needed. In this way, received signal blocks 32 with long time windows 34 can be used in order to achieve correspondingly good resolution in relation to the Doppler shift. In addition, the received signals 26 can be processed in parallel in one or more other received signal blocks 32 .
- the corresponding radar system 12, 14 can use relatively long received signal blocks 32 to evaluate the received signals 26, for example in order to examine a detected object more closely.
- the received signals 26 can be processed with other received signal blocks 32 which have shorter time windows 34 .
- the received signals 26 can be processed in parallel with a lower resolution without losing time. Longer reception signal blocks 32 can be activated as required and then deactivated, for example if high resolution is not required.
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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)
- Mechanical Engineering (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020121318.2A DE102020121318A1 (de) | 2020-08-13 | 2020-08-13 | Verfahren zum Betreiben einer berührungslos arbeitenden Detektionsvorrichtung zur Überwachung wenigstes eines Überwachungsbereichs, Detektionsvorrichtung und Fahrzeug mit wenigstens einer Detektionsvorrichtung |
| PCT/EP2021/071521 WO2022033907A1 (de) | 2020-08-13 | 2021-08-02 | Verfahren zum betreiben einer berührungslos arbeitenden detektionsvorrichtung zur überwachung wenigstes eines überwachungsbereichs, detektionsvorrichtung und fahrzeug mit wenigstens einer detektionsvorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4196819A1 true EP4196819A1 (de) | 2023-06-21 |
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| EP21752686.2A Pending EP4196819A1 (de) | 2020-08-13 | 2021-08-02 | Verfahren zum betreiben einer berührungslos arbeitenden detektionsvorrichtung zur überwachung wenigstes eines überwachungsbereichs, detektionsvorrichtung und fahrzeug mit wenigstens einer detektionsvorrichtung |
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| US (1) | US20230296763A1 (de) |
| EP (1) | EP4196819A1 (de) |
| JP (1) | JP7537005B2 (de) |
| KR (1) | KR102835130B1 (de) |
| CN (1) | CN116261672A (de) |
| DE (1) | DE102020121318A1 (de) |
| WO (1) | WO2022033907A1 (de) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5959574A (en) * | 1993-12-21 | 1999-09-28 | Colorado State University Research Foundation | Method and system for tracking multiple regional objects by multi-dimensional relaxation |
| USRE44807E1 (en) * | 1993-12-21 | 2014-03-18 | Colorado State University Research Foundation | Method and system for tracking multiple regional objects by multi-dimensional relaxation |
| DE19609728C2 (de) * | 1996-03-13 | 1998-01-29 | Deutsche Forsch Luft Raumfahrt | Verfahren zur Azimut-Skalierung von SAR-Daten und hochgenauer Prozessor zur zweidimensionalen Verarbeitung von ScanSAR-Daten |
| US6018311A (en) * | 1998-07-14 | 2000-01-25 | Raytheon Company | Noncoherent gain enhancement technique for improved detection-estimation performance |
| US6850616B2 (en) * | 2001-01-22 | 2005-02-01 | Cirrus Logic, Inc. | Frequency error detection methods and systems using the same |
| US6856276B2 (en) * | 2001-07-26 | 2005-02-15 | Codar Ocean Sensors, Ltd. | Multi-station HF FMCW radar frequency sharing with GPS time modulation multiplexing |
| US6538599B1 (en) * | 2001-11-16 | 2003-03-25 | Raytheon Company | Noncoherent gain enhancement technique for non-stationary targets |
| DE102009016480B4 (de) | 2009-04-06 | 2021-12-23 | Conti Temic Microelectronic Gmbh | Verfahren für ein Radarsystem zur Unterdrückung von Mehrdeutigkeiten bei der Bestimmung von Objektmaßen |
| EP2417908A1 (de) | 2010-08-12 | 2012-02-15 | Philips Intellectual Property & Standards GmbH | Vorrichtung, System und Verfahren zum Messen der Vitalzeichen |
| US9191582B1 (en) * | 2011-04-29 | 2015-11-17 | Bae Systems Information And Electronic Systems Integration Inc. | Multi-mode high speed sensor |
| EP2845191B1 (de) * | 2012-05-04 | 2019-03-13 | Xmos Inc. | Systeme und verfahren zur trennung von quellsignalen |
| US9853365B2 (en) | 2015-05-05 | 2017-12-26 | Texas Instruments Incorporated | Dynamic programming of chirps in a frequency modulated continuous wave (FMCW) radar system |
| EP3121619A1 (de) * | 2015-07-22 | 2017-01-25 | Nxp B.V. | Radarsystem |
| WO2018146530A1 (en) * | 2017-02-10 | 2018-08-16 | Uhnder, Inc. | Reduced complexity fft-based correlation for automotive radar |
| IL259190A (en) * | 2018-05-07 | 2018-06-28 | Arbe Robotics Ltd | System and method of fmcw time multiplexed mimo imaging radar using multi-band chirps |
| GB2578123B8 (en) * | 2018-10-16 | 2021-08-11 | Darkvision Tech Inc | Overlapped scheduling and sorting for acoustic transducer pulses |
| US10969466B2 (en) * | 2018-11-13 | 2021-04-06 | GM Global Technology Operations LLC | Sliding window integration scheme for object detection in a radar system |
| US11099267B2 (en) * | 2018-12-18 | 2021-08-24 | Nxp Usa, Inc. | Extended doppler PMCW code division MIMO radar |
| US11513204B2 (en) * | 2019-09-27 | 2022-11-29 | Intel Corporation | Methods and apparatus to combine frames of overlapping scanning systems |
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- 2021-08-02 CN CN202180063217.5A patent/CN116261672A/zh active Pending
- 2021-08-02 EP EP21752686.2A patent/EP4196819A1/de active Pending
- 2021-08-02 WO PCT/EP2021/071521 patent/WO2022033907A1/de not_active Ceased
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| KR20230048402A (ko) | 2023-04-11 |
| JP2023537401A (ja) | 2023-08-31 |
| US20230296763A1 (en) | 2023-09-21 |
| DE102020121318A1 (de) | 2022-02-17 |
| WO2022033907A1 (de) | 2022-02-17 |
| JP7537005B2 (ja) | 2024-08-20 |
| CN116261672A (zh) | 2023-06-13 |
| KR102835130B1 (ko) | 2025-07-16 |
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