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
• • 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
  • G01S7/40—Means for monitoring or calibrating
• • 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
  • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated 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
  • 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
  • G01S7/40—Means for monitoring or calibrating
  • G01S7/4052—Means for monitoring or calibrating by simulation of echoes
• • 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
  • G01S7/40—Means for monitoring or calibrating
  • G01S7/4052—Means for monitoring or calibrating by simulation of echoes
  • G01S7/406—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder
  • G01S7/4065—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder involving a delay line
• • 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
  • G01S7/40—Means for monitoring or calibrating
  • G01S7/4052—Means for monitoring or calibrating by simulation of echoes
  • G01S7/4082—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder
• • 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
  • G01S7/40—Means for monitoring or calibrating
  • G01S7/4052—Means for monitoring or calibrating by simulation of echoes
  • G01S7/4082—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder
  • G01S7/4086—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder in a calibrating environment, e.g. anechoic chamber
• • 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
  • G01S7/40—Means for monitoring or calibrating
  • G01S7/4052—Means for monitoring or calibrating by simulation of echoes
  • G01S7/4082—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder
  • G01S7/4095—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder the external reference signals being modulated, e.g. rotating a dihedral reflector or modulating a transponder for simulation of a Doppler echo
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
  • H01P1/00—Auxiliary devices
  • H01P1/10—Auxiliary devices for switching or interrupting

Definitions

• the present device relates to a switching device for a radar target emulator.
• Driver assistance systems or assistance systems are generally responsible for this, which use information about the vehicle environment, in particular and the probable route, via in-vehicle sensors and / or via communications with other vehicles and / or stationary stations or services to assist the driver in standard driving situations and / or to support extreme situations in the form of indications and / or to actively intervene in vehicle behavior.
• radar sensors are used, which monitor the immediate environment of the vehicle with respect to obstacles and / or preceding vehicles or the like.
• the radar sensors mentioned are pivotable in a horizontal plane (azimuth plane) and in a vertical plane (elevation plane), which among other things, an increased spatial resolution can be made possible and unrealistic targets such as point targets are recognizable.
• information about the, in particular virtual, test scenario must be supplied to it from different directions.
• a closed-loop radar operation monitor which includes a delay line arrangement for generating the plurality of simulated radar target echo signals.
• a series of simulated radar target echoes are generated under the influence of multiplexer control.
• the number of target echoes that is generated is determined by the length of time the multiplexer controller turns on an R-port of the multiplexer.
• a radar operation monitor has a self-contained delay line. As a result, the delay of signals through the delay line is made only after generating a plurality of individual signals from radar targets, as shown for example in Fig. 2 of said document.
• US 5,247,843 relates to a system and method for simulating electromagnetic environments, wherein an array of one or more horns emits electromagnetic signals at apparent angles to a receiving antenna.
• WO 2016 02225683 A1 relates to a method and a device for determining a misalignment of a radar sensor unit, wherein a plurality of targets are provided by an adjusting device in an arrangement and in each case two targets are aligned horizontally or vertically relative to one another.
• a switching device for a radar target emulator or a radar target demultiplexer having such a switching device, which is improved over the prior art.
• This object is achieved according to the present invention by a switching device for a radar target emulator according to claim 1, a time delay device according to FIG. 6 and a radar target emulator with such a switching device according to claim 7.
• One aspect of the present invention relates to a switching device for a radar target emulator, in particular of the type described here, comprising at least a first switching arrangement and a second switching arrangement, each having a branching device which is adapted to receive a first input signal, into a branch signal and a first Branch output signal; a switching device which is set up to forward the branch signal in a first switching state within the switching arrangement and not to forward it in a second switching state; and an adder, which is configured to output the signal forwarded in the first switching state of the switching device at least as a component of a second output signal, wherein the first switching arrangement and the second switching arrangement are interconnected such that a first input signal of the second switching arrangement produces a first output signal
• First switching arrangement comprises, in particular forms, or a second input signal of the second switching arrangement comprises a second output signal of the first switching arrangement, in particular forms.
• the switching architecture may preferably also contain digital elements.
• a plurality of radar targets at different distances and / or at different positions in the azimuth plane and / or the elevation plane can be easily emulated.
• the extent of individual targets along the azimuth plane and / or elevation plane can also be emulated. Due to the scalable structure of the switching device, a simple and flexible extension of the switching device is possible, in particular as regards the number of emulatable radar targets and / or the possible target distances or positions of the targets.
• a “switching device” in the sense of the present invention is in particular a device which is provided, in particular adapted, to output a plurality of input signals depending on the application as an output signal or as a plurality of output signals, wherein the switching device is provided in particular, in particular set up to output any combination of input signals at one or more outputs, wherein the output signals output at different outputs, in particular independently of each other, may be composed of a part of the input signals or of all input signals In some applications, none of them can have one or more outputs the input signals are output.
• a "radar target emulator” in the sense of the present invention is in particular a device for stimulating a sensor, in particular a vehicle, which in particular receives a radar signal of the sensor, modulates and returns it to the sensor, wherein the modulation maps the test scenario to the sensor Reaction of a control device of the vehicle on this, in particular virtual, test scenario to determine and evaluate.
• a “switching arrangement" in the sense of the present invention is in particular a kind of "unit cell” of the switching device.
• the switching arrangement is in particular a device for the controlled forwarding of a signal, in particular a radar signal, which is provided, in particular adapted, to receive a signal, in particular a radar signal, to branch, to output a part of the input signal as a first output signal and a second part as Forward branch signal according to a switching state or not.
• a “branching device” in the sense of the present invention is an electrically, in particular passive, component in the area of high frequency, which serves to branch an electromagnetic power described as a guided wave or to decouple or to couple it into a conductor structure
• the invention comprises a bridge circuit, comprising transformers and capacitors, or a line coupler, which For example, is formed on an electrical circuit board in the form of strip lines or with a combination of waveguides.
• a branch device may be a directional coupler, an asymmetric Wilkinson divider, a two-output transistor amplifier, or a transformer with two independent output coils.
• a “switching device” in the sense of the present invention has, in particular, a switch which is provided, in particular configured, for relaying a signal depending on the switching state or not.
• An “adding device” in the sense of the present invention is, in particular, an electrically passive component in the field of high-frequency technology, which serves to couple an electromagnetic power described as a guided wave into a conductor structure
• adder devices in the sense of the present invention can also be actively implemented, for example by using a summing circuit with broadband operational amplifiers.
• the switching device has further switching arrangements which at least essentially correspond in their construction to the first and / or second switching arrangement, wherein a first input signal of a, in particular immediate, downstream switching arrangement, a first output signal of the respective, in particular immediately upstream Has switching arrangement, in particular forms.
• the first output signal of an upstream switching arrangement is a first input signal one, in particular telbar, downstream switching arrangement.
• This embodiment is furthermore particularly advantageous, since in this way the first input signal of the upstream switching arrangement at least substantially corresponds to the first input signal of the downstream switching arrangement, so that this input signal can be used at least substantially identically by both switching arrangements. In this way, at least substantially the same input signal may be provided to a plurality of downstream subscribers as needed.
• the switching device further switching arrangements, which at least substantially correspond in their construction of the first and / or second switching arrangement, wherein a second input signal, in particular immediately, downstream switching arrangement has a second output signal of the respective, in particular immediately upstream switching arrangement , in particular forms.
• the first output signal of an upstream switching arrangement is a first input signal
• the second output signal of the switching arrangement in particular upstream, can or may not be combined with an additional signal depending on the switching state of the switching device Downstream switching arrangement in the first switching state, in the downstream switching arrangement, the second output signal of the upstream switching arrangement with the branch signal of the downstream scarf t arrangement combined.
• the switching device of the downstream switching device is in the second switching state, the second output signal of the upstream switching device is not combined with the branch signal of the downstream switching device and the second output signal of the upstream switching device is output at least substantially unchanged as a second output signal of the downstream switching device. This continues to be the case particular advantageous because in this way, depending on the switching state of the switching arrangements of one or more input signals can be changed.
• the switching arrangements are connected in the form of a matrix, wherein the switching arrangements are arranged in particular at crossing points of the matrix.
• the switching arrangements are connected in the form of a matrix, wherein in particular the switching arrangements form the elements of the matrix.
• the matrix may be arbitrarily extended starting from a (1 x 2) or (2 x 1) configuration. This is particularly advantageous because in this way, depending on the application, a corresponding matrix of switching arrangements can be connected to a switching device. In this way, the switching device according to this embodiment of the present invention, and in particular the radar target in the sense of the present invention described below, is improved in its flexibility.
• the matrix has a plurality of rows and / or columns.
• the columns of the matrix represent different distances of emulated objects in the course of radar speech emulation and the lines represent different objects to be emulated. That is, according to a preferred embodiment, each column represents a different time delay and each row represents a different object.
• the columns of the matrix represent different positions of the objects to be emulated, in particular in the azimuth plane or the elevation plane, in particular with respect to the radar sensor. That is, according to a preferred embodiment, each column represents a different position and each row represents a different object.
• the first and second switching arrangement and, if appropriate, further switching arrangements each have a variable attenuation and / or amplification device, which is set up to amplify and / or attenuate the branch signal.
• the variable attenuation and / or amplifier device is arranged in the signal direction behind the switching device.
• variable attenuation and / or amplifier device has a signal amplifier for amplifying the signal forwarded in the first switching state of the switching device and a signal attenuator for attenuating the signal forwarded in the first switching state of the switching device.
• the signal forwarded in the first switching state of the switching device in particular with respect to the second input signal of the switching arrangement, can be adapted so that in particular the second output signal output at a signal direction in the signal direction has a predetermined proportion of that in the first switching state of the switching device forwarded signal contains.
• the signal forwarded in the first sound state of the switching device can also be adapted with respect to the first output signal of the branching device. This allows a particularly flexible signal routing.
• the weighting of an original signal which preferably represents an object and, due to the corresponding control of one or more switching devices, is contained in a plurality of second output signals of adjacent switching arrangements, is determined by means of the variable attenuation and / or amplification device.
• This allows an extension of the object to be easily emulated.
• individual signal components of the modulated output signal can be weighted independently of one another and distributed with this weighting, for example, to a plurality of antenna devices of a radar target emulator.
• the inventive radar target emulator has at least one first switching device of the type described here, at least one time delay.
• a device with a time delay device which is adapted to receive an original signal and / or a branch device output signal of an upstream time delay arrangement to delay and provide a delayed signal
• a branch device which is adapted to receive the delayed signal in a branch signal and a branching first output signal, supplying the branch signal of at least one of the switching devices of the first switching device as a first input signal and outputting the first output signal and at least one Zielemulationsan accent, which is adapted to receive the second output signal, in particular in the signal direction last switching arrangement of the first switching device, a Perform signal modulation on the second output signal and provide a modulated output signal.
• the radar target emulator comprises at least one second switching device of the type described herein, at least one time delay device having a time delay device adapted to receive, delay and provide as a delayed signal an original signal and / or a delayed signal of an upstream time delay device and at least one target emulation device adapted to receive the delayed signal, perform signal modulation on the delayed signal and provide a modulated output signal, the output signal provided by the target emulation device being a second input signal at a first switching arrangement of the second Switching device is provided.
• the first and second switching device with the at least one first switching arrangement and the at least one second switching arrangement allows flexible signal guidance of a time-delayed original signal in the signal components of the original signal in a freely selectable manner, possibly with a predetermined weighting, at one or more outputs, in particular at least one in the signal direction last switching arrangement, the first and second switching device can be provided.
• the first and second switching device can be provided in the one execution.
• different delays generated in the other embodiment differently modulated signals are distributed differently or superimposed.
• a "time delay arrangement" in the sense of the present invention is especially adapted to receive and delay a signal, in particular a radar signal, in particular from a vehicle, so that in the further signal waveform objects with different, in particular virtual, distances to the sensor, in particular to a Radar sensor, which can be emulated.
• a “time delay device” in the sense of the present invention has in particular a so-called delay line, also called “delay line”, which is designed, for example, in the form of a coaxial cable.
• a “target emulation arrangement” is an arrangement which picks up the original signal delayed by the time delay arrangement, optionally also by the first switching device, depending on the application, performs a signal modulation thereon, in particular in order to modulate the object to be emulated and to provide the thus modulated output signal.
• the time delay arrangement in particular the time delay device, and / or the target emulation device are at least partially analogous in a preferred embodiment of the invention, i. at least partially constructed of analog electrical components.
• This enables particularly short processing times in which the radar signal is processed, in particular delayed and / or modulated, so that objects in small, in particular virtual, distances to the radar sensor, preferably of less than 30 m, in particular of less than 20 m, are emulated can.
• the time delay arrangement in particular the time delay device, and / or the Zielemulationsan Aunt is at least partially executed digitally, ie it has at least one arithmetic unit which is adapted to replace at least one analog component by digitally simulating the function of the at least one analog component
• the time delay arrangement in particular The time delay device and / or the target emulation device are at least partially embodied as a computer program which, when executed on a suitable computing unit, fulfills the function mentioned above in connection with the time delay device, in particular the time delay device and / or the target emulation device.
• the deceleration or modulation of the radar signal can be adapted flexibly to changed requirements, ie a changed number of objects to be emulated or their, in particular virtual, distances.
• a single time delay arrangement in particular in connection with the first switching device can be used to emulate at least substantially any number of objects using a single time delay arrangement, and on the other hand an already delayed and for the emulation of an object corresponding to the modulated original signal, in particular the second switching device, recorded and output at different outputs, in particular as a second output signal of a plurality of switching arrangements of the second switching device, according to a predetermined spatial distribution.
• the time delay arrangement has a plurality of time delay devices, which are connected in series and are each connected to one another via at least one branching device of the type described here.
• the time delay devices are configured to implement mutually different and / or respectively identical or arbitrary combinations of time delays. This is achieved for example by interconnecting coaxial cables with the same and / or different lengths.
• the time delay arrangement of the radar target emulator comprises an amplifier means arranged to amplify the first input signal prior to feeding to at least one of the switching arrangements. This is particularly advantageous since in this way only a comparatively small part of the signal to be delayed has to be branched off as a branch signal and the signal intensity in the time delay device (s) remains at least substantially constant.
• the radar target emulator has at least two transmitting devices which are each set up to receive a second output signal, in particular a last switching arrangement of the second switching device in the signal direction, and to emit them in the form of electromagnetic radiation.
• the second switching device is set up to output each of the second output signals, in particular generated or composed thereof, to a respective transmitting device.
• the transmitting devices are preferably spatially spaced from one another, in particular spatially distributed in a predetermined region.
• the predetermined region can be a one-dimensional region, in particular a line.
• the predetermined region may be a two-dimensional region, in particular a surface.
• the number of transmitting devices thereby corresponds to a number of circuitry side by side, i. interconnected switching arrangements of the second switching device, so that each of the second output signals can be received by each one of the transmitting devices and emitted in the form of electromagnetic radiation.
• At least two of the at least two transmitting devices are arranged next to one another in such a way, in particular along a line, that objects emulated by means of the emitted electromagnetic radiation can be represented in an azimuth angle range.
• at least two of the at least two transmitting devices are arranged in such a way, in particular along a line, that by means of the emitted electromagnetic radiation ment emulated objects can be displayed in an elevation angle range.
• the at least two of the at least two transmitting devices are preferably arranged along a curved line, which in some embodiments has a radius of curvature.
• a center of the curved line preferably corresponds to the position of a radar sensor, in particular of a motor vehicle.
• one or more emulated objects in different positions, in particular along a line in an azimuth plane or elevation plane, in particular independently of one another can be output to the radar sensor or represented for the radar sensor by at least two transmitting devices arranged next to one another.
• the one or more emulated objects, in particular independently of one another and in particular along this line can be moved (virtually).
• the radar target emulator further comprises at least one further time delay arrangement with a time delay. device, which is adapted to receive a further original signal to delay and provide as a delayed further signal.
• at least one further target emulation device is arranged to receive the delayed further signal, perform signal modulation on the delayed further signal and provide a modulated further output signal, the modulated output signals and modulated further output signals provided by the at least one target emulation device and the at least one further target emulation device are provided as second input signals at one, in particular in the signal direction first, switching arrangement of the second switching device.
• a plurality of time delay arrangements may be arranged to respectively receive and time delay one of a plurality of source signals, each of the delayed signals provided by the respective plurality of time delay arrangements being received, modulated and provided as a modulated output signal by a respective target emulation arrangement.
• the switching device preferably has a number of switching arrangements, in particular first in the signal direction, which corresponds to the number of target emulation arrangements.
• an origin signal may characterize a radar signal that can detect objects in a main sensing area of the radar sensor that is in front of the radar sensor, while at least one other origin signal characterizes a radar signal that can detect objects in a side of the main sensing area relative to the radar sensor.
• the radar target emulator has at least two receiving devices, each of which is set up to detect a radar signal emitted by a radar sensor and to provide a corresponding original signal.
• the time delay device of the at least one time delay arrangement is preferably configured to receive an origin signal provided by one of the at least two receiving devices.
• the time delay device of the at least one further time delay arrangement is preferably set up to receive a further origin signal provided by a further one of the at least two receiver devices.
• the receiving devices are preferably arranged with respect to the radar sensor such that they can detect radar signals emitted by the radar sensor in different detection ranges of the radar sensor. In particular, the receiving devices may be configured to receive radar signals of different frequencies of the radar sensor.
• At least one receiving device is configured to detect radar signals of the radar sensor in a main detection area of the radar sensor lying in front of the radar sensor and to generate at least one corresponding origin signal.
• at least one further receiving device is adapted to detect radar signals of the radar sensor in a sub-detection area, which lies with respect to the radar sensor laterally of the main detection area, and to generate a corresponding further origin signal.
• the target emulation device comprises: a vector modulation device configured to modulate the second output signal, in particular the signal direction last switching arrangement of the first switching device or the delayed signal provided by the at least one time delay device by means of a Doppler shift having signal modulation and in the form of an intermediate signal, and / or an adder which is adapted to output the intermediate signal at least as part of a modulated output signal.
• a vector modulation device configured to modulate the second output signal, in particular the signal direction last switching arrangement of the first switching device or the delayed signal provided by the at least one time delay device by means of a Doppler shift having signal modulation and in the form of an intermediate signal
• an adder which is adapted to output the intermediate signal at least as part of a modulated output signal.
• the adder can modulate the signal modulated in this vector modulation device in an embodiment may be combined with signals from further vector modulation means so as to output an output signal from the radar target emulator which emulates a plurality of objects at the same and / or different distances.
• the target emulation device further comprises a variable attenuation and / or amplification device, which is in particular adapted to convert the intermediate signal before being supplied to the adder or the Doppler shift modulated signal prior to output to a switching device of the second Adjusting the switching device in its amplitude.
• a variable attenuation and / or amplification device which is in particular adapted to convert the intermediate signal before being supplied to the adder or the Doppler shift modulated signal prior to output to a switching device of the second Adjusting the switching device in its amplitude.
• the radar target emulator has a noise signal arrangement, comprising a Störsignal washerstel- ment device which is adapted to provide a noise signal, and an adder, which is adapted to output the noise signal at least as part of a modulated output signal.
• the interference signal arrangement has a variable attenuation and / or amplification device, which is set up to adjust the amplitude of the interference signal before it is fed to the adder device, which is particularly advantageous since a further possibility is provided in this way to match the emulated signal to the test scenario, in particular to increase the match between real use and the test environment.
• the interference signal arrangement is signal-carrying connected to a Zielemulsaniser, wherein the intermediate signal of the Zielemulsanowski extract is at least partially transmitted before being supplied to the adder and wherein this intermediate signal as a basis for the provision of the interference signal is used, in particular to provide a synchronous interference signal.
• the target emulation device further comprises: at least one further switching device of the type described herein and at least one further time delay device having a time delay device arranged to receive the second output signal or a first output signal of an upstream further time delay device and to provide as a delayed signal; and a branching means arranged to receive the delayed signal, to branch into a branch signal and an output signal, to supply the branch signal to at least one of the further switching arrangements as an input signal and to output the output signal.
• the radar target emulator has a first switching device and a second switching device, wherein the at least one target emulation device is connected to the first and second switching device in such a way that the target emulation device receives a second output signal of a signal device in the last switching arrangement of the first switching device, performs a signal modulation on the second output signal and provides a modulated output signal as an input signal of a signal direction in the first switching arrangement of the second switching device.
• this embodiment of the invention provides a radar target emulator by advantageously combining features of a radar target emulator with a first switching device having features of a radar target emulator with a second switching device.
• the first switching device is preferably such with at least a time delay arrangement and at least one Zielemulationsanowski interconnects that at least one of at least one switching arrangement of the first switching device recorded first input signal containing a signal delayed by the time delay arrangement, in particular forms at least partially contained in at least one second output signal at least one switching arrangement of the first switching device, which can be picked up and modulated by at least one target emulation device.
• the second switching device is preferably connected to the at least one target emulation device such that at least one first input signal of at least one switching device of the second switching device contains, in particular forms, a modulated output signal of the at least one target emulation device.
• a plurality of, in particular in signal directions last, switching arrangements of the first switching device is connected in each case with a Zielemulationsanowski, so that different time-delayed parts of the original signal can be received as second output signals from each of a Zielemulss worn by the time delay arrangement in connection with the first switching device.
• a plurality of, in particular in the signal direction first, switching arrangements of the second switching device is preferably connected in each case with a Zielemulationsan whatsoever, so that by means of the entirety of the switching arrangements of the second switching device, the modulated output signals of the Zielemulationsan instructen at one or, optionally weighted, a plurality of, in particular in signal directions last, switching arrangements of the second switching device can be provided.
• the time delay of a modulated signal and its output location, in particular relative to a radar sensor can thus be freely selected and, in particular, changed dynamically.
• Fig. 1 is a circuit diagram of a Radarzielemulators with a switching device according to a first embodiment of the present invention
• Fig. 1a is a circuit diagram of a switching arrangement of the switching device according to a
• Fig. 2 is a circuit diagram of a radar target emulator with a switching device according to a second embodiment of the present invention
• FIG. 3 is a circuit diagram of a test stand for stimulating a radar sensor from different directions
• Fig. 4 is a circuit diagram of a radar target emulator with a switching device according to a third embodiment of the present invention.
• Fig. 5 is a circuit diagram of a test stand for detecting emitted in different directions radar signals.
• Fig. 1 is a circuit diagram of a Radarzielemulators 1 is shown with a switching device 100 according to a first embodiment of the present invention and in Fig. 1a is a circuit diagram of a switching device 1 10 of the switching device 100 according to an embodiment of the present invention.
• a first input signal E1 is branched by the branching device 1 12 into a first output signal A1 and a branch signal, which is the switching device 1 14 is supplied.
• the switching device 1 14 is adapted to switch back and forth between at least two switching states, in particular between a first switching state and a second switching state, wherein the branch signal in the first switching state of the adder 1 16 is supplied and is not forwarded in the second switching state ,
• the adder 1 16 combines a second input signal E2 with the branch signal to a second output signal A2.
• a second input signal E2 does not necessarily have to be applied, in particular to the left-hand column of the switching arrangements in FIG. 1, in order to ensure the correct interconnection.
• the second output signal A2 is formed at least substantially exclusively by the branch signal.
• the switching arrangement 1 10, 110a, 110b has for this purpose an attenuation and / or amplifying device 330, which forms part of a signal-carrying connection between the switching device 1 14 and the coding device 16.
• the first output signal A1 at least substantially corresponds to the first input signal E1, whereby, as already explained, a part of it has been branched off as a branch signal in the switching arrangement 110, 110a, 110b.
• the switching device 100 illustrated in FIG. 1 has four switching arrangements 110 in a first row and four further switching arrangements 110 in a second row on. These together form a (4 x 2) matrix of switching arrangements 1 10.
• a first input signal E1 are introduced, which, however, are different from column to column, in particular differ in their delay, as will be described in detail below.
• a second output signal A2 is provided which, depending on the switching state of the switching devices 14, may differ from one or more of the other output signals.
• the columns of the matrix thus correspond to different distances of objects to be imaged, with a separate line being provided for each object to be imaged. That is, with the configuration of the radar target emulator 1 shown in FIG. 1, two different objects having different or equal distances from the radar sensor can be independently emulated. For this purpose, only a single delay line is required in a particularly advantageous manner, which can provide different delayed signals for the emulation of the two objects to be imaged.
• a time delay arrangement 200 with a time delay device 210, a branching device 220 and, if appropriate, preferably an amplifier device 230 will now be explained below.
• an original signal U is delayed.
• a distance of an object to be emulated is imaged to the test sensor.
• the thus delayed signal is branched off via the branching device 220, wherein a branch signal is amplified via the amplifier device 230 and fed to a first switching device 110a as the first input signal E1.
• the original signal U is a signal which is emitted by a real radar sensor of a test vehicle, is picked up by a receiving device arranged in front of the time delay arrangement 200 and supplied to the time delay arrangement 200.
• the second output signals A2 generated in the above-described manner are respectively supplied to different target emulation devices 300 from each other.
• the target emulation device 300 comprises a vector modulation device 310, an adder 320 and a variable attenuation and / or amplification device 330.
• the vector modulation device 310 modulates the object to be emulated onto the delayed signal and adjusts its amplitude via the variable attenuation and / or amplifier device 330 before it is forwarded via the adder 320 as part of a modulated output signal Am.
• the jamming signal arrangements may generate a nonsynchronous jamming signal, such as the jamming signal arrangement 340a or generating a synchronous jamming signal, such as the jamming signal arrangement 340b.
• An interference signal arrangement 340a, 340b has an interference signal providing device 342, an adder 344 and a variable attenuation and / or amplification device 346.
• a corresponding signal (in this case an interference signal) is generated by the interference signal arrangements 340a, 340b, adjusted in terms of amplitude by means of the variable attenuation and / or amplifier device and via the adder 344 as part of the modulated output signal Am forwarded.
• the noise signal arrangement 340b which is configured to generate a synchronized interference signal, is signal-connected to a target emulation arrangement 300 in a manner such that the interference signal occurs the time delayed second output signal of the respective connected target emulation device 300 is modulated.
• Fig. 2 is a circuit diagram of a radar target emulator with a switching device according to another embodiment of the present invention.
• the radar target emulator 1 has four series-connected time delay arrangements 200, which each generate a time delay of 4.
• These first input signals E1 thus generated, like the original signal, go into a switching device 100 of the type described above, but in the form of one (2 ⁇ 5).
• Each of the second output signals A2 thus generated at the end of each line is supplied to a target emulation device 300.
• the vector modulation device 310 Before the second output signal A2 of the respective row of the switching device 100 is supplied to the vector modulation device 310, another block of three time delay arrangements 200, which are connected in series and each realize a time delay of, and a further switching device 100 in the form of (1 x 4 ) Matrix interposed.
• FIG. 3 shows a test stand for stimulating a radar sensor RS, for example of a vehicle, from different directions.
• the test stand has, in particular, a receiving device RX for receiving radar signals which are emitted by the radar sensor RS to be sent out.
• a radar signal received in this way is received by a radar target emulator 1 as original signal U.
• the original signal U is split in such a way that a correspondingly modulated output signal Am based on the original signal can be output for each object to be emulated.
• each of the modulated output signals Am is delayed in time, so that each of the signals output by the delay and modulation module 2 can be associated with a virtual object at a virtual distance from the radar sensor RS.
• the modulated output signals Am are provided to a switching device 100, which is preferably adapted to receive each of the modulated output signals Am and output, in particular as second output signals A2, to at least one of a plurality of transmit devices TX, as described with reference to FIG. 4 is described in detail below.
• the transmission devices TX are set up to transmit to the radar sensor RS the second output signals A2 applied thereto by the switching device 100 in the form of electromagnetic radiation.
• the transmission devices TX are set up to convert the second output signals A2 into radar signals. Due to the spatial distribution, in particular spacing relative to one another, of the individual transmission devices TX, the radar signals arrive at the radar sensor RS at different angles. Accordingly, a simulated object for the radar sensor RS at a substantially arbitrary position, which on the one hand on the basis of the signal distribution of the second output signal A2 to the transmitting devices TX and on the other hand based on the time delay of the corresponding modulated output signal Am can be represented.
• the position results from the combination of the (virtual) distance with the position of the transmitting device TX transmitting the radar signal.
• the position of an object to be displayed for the radar sensor RS is composed of a real component and a virtual component, the real component being an angle, in particular azimuth and / or elevation angle, which depends on the spatial position of the electromagnetic radiation (FIG. n) antenna (s) with respect to the radar sensor RS depends, and the virtual component is formed by the time delay of the corresponding signal.
• the delay and modulation module 2 preferably has at least one time delay arrangement 200 and at least one target emulation arrangement 300, which in one embodiment are connected to one another in such a way that each one initially subsequently delayed by a time delay arrangement 200, the (original) signal is subsequently modulated by a target emulation device 300.
• the delay and modulation module 2 preferably has a pair of a time delay arrangement 200 and a target emulation arrangement 300 for each object to be emulated, so that a modulated output signal Am can be output or provided to the switching device 100 for each object to be emulated.
• the delay and modulation module 2 can be implemented at least partially digitally.
• the delay and modulation module 2 can at least partially be embodied as a computer program which can be executed on a computing unit (not shown) and which, if executed appropriately, temporally delays and modulates the original signal U.
• the delay and modulation module 2 in this embodiment provides the thus-produced modulated output signals Am at one or more interfaces so that the modulated output signals Am can be picked up by the switching device 100.
• FIG. 4 shows a circuit diagram of a radar target emulator 1 having a first and a second switching device 100a, 100b according to a third embodiment of the present invention.
• the second switching device 100b is connected to a delay and modulation module 2, which is adapted to receive a received radar sensor RS radar signal as original signal U and to delay and modulate in time, the plurality of delayed and modulated output signals Am, which each represent an object to be emulated at a distance from the radar sensor RS, can be output.
• the deceleration and modulation module 2 can have a variant of the embodiment of the invention shown in FIG. 1, in particular formed by it.
• the original signal U is preferably recorded by a time delay arrangement 200, which is followed by further, for example three, time delay arrangements 200.
• the time delay arrangements 200 preferably each output a time-delayed branch signal as first input signal E1 to switching arrangements 110 of the first switching device 100a.
• the time-delayed first input signals E1 recorded in this way by the first switching device 100a are guided by the matrix formed by the switching arrangements 110, which preferably has a number of lines corresponding to the number of objects to be emulated and in this way by branching devices 1 12 diverted, forwarded by switching devices 1 14 or not forwarded and added by adders 1 16, which is output from the signal direction in the last switching device 1 10 of the first switching device 100a in each row of the matrix in each case a delayed second output signal A2, which a predetermined Distance of an object to be emulated to the radar sensor RS corresponds.
• the modulated output signals Am output from the target emulation devices 300 each image an object to be emulated at a predetermined interval.
• the modulated output signals Am provided by the target emulation arrangements 300 are received in the embodiment shown by in each case one signal arrangement in the first switching arrangement 1 10 of the second switching device 100b.
• the switching arrangements 110 of the second switching device 100b are preferably likewise arranged in the form of a matrix, in particular interconnected, which particularly preferably has an equal number of rows as that of the switching arrangements 110 the first switching device 100a formed matrix.
• the second switching device 100b for each Zielemulationsan angel 300 that is preferably for each object to be emulated, each having a row of series-connected switching devices 1 10 on.
• a signal representing an object to be emulated is processed independently of other signals in other lines, in particular branched, forwarded or not forwarded, amplified or attenuated, and / or added.
• the modulated output signals Am are conducted through the second switching device 100b in such a manner that further second output signals A2 'are provided at signal circuits last in the signal direction 1, which may contain one or more modulated output signals Am or at least portions thereof.
• each part of the signal are branched off through the branching device 1 12 and by the switching device 1 14 in a first switching state within the respective Switching 110 are forwarded.
• each signal component can be further amplified or attenuated before it is combined by the adder 16, possibly with another modulated output signal Am or a portion thereof.
• each modulated output signal Am to one or more outputs of the second switching device 100b.
• a plurality of modulated output signals Am or portions thereof may be provided at the same output.
• each further second output signal A2 ' may contain one or more objects to be emulated, in particular also a part of an object to be emulated.
• the further second output signals A2 ' are preferably received by spatially juxtaposed transmitting devices TX and as electromagnetic Radiation, ie as radar signals, sent back at different angles to the radar sensor RS. Due to the above described variable distribution of the modulated output signals Am, which each characterize an object to be emulated, to the further second output signals A2 ', the objects to be emulated for the radar sensor RS can therefore be in different positions within a range determined by the spatial distribution of the transmitting devices TX is defined.
• the second switching device 100b is arranged to connect the further second output signals A2 'to a two-dimensional spatial arrangement of transmitting devices TX, i. a so-called antenna array to distribute.
• TX transmitting devices
• the objects to be emulated can be displayed at different positions both in an azimuth plane and in a plane of elevation perpendicular thereto.
• Fig. 5 is a circuit diagram of a test stand for detecting radar signals which are emitted by a radar sensor RS in different directions is shown. The different directions are characterized by different detection ranges 20, 30 of the radar sensor RS.
• the radar sensor RS is set up to emit radar signals, preferably at a first frequency or from a first frequency band or with a first modulation, into a main detection area 20 in order to scan objects in this main detection area 20 with reference to them Objects reflected radar signals to capture.
• the radar sensor RS is preferably also adapted to radar signals, preferably at one of the first different second frequency or from a first different second frequency band or one of the first different second modulation, in a sub-detection range 30 to send objects in to detect this sub-detection area 30 on the basis of radar signals reflected at these objects.
• the test stand with which the radar sensor RS can be stimulated has, in the example shown, a radar target emulator 1 with a plurality of receiving devices RX, delay and modulation modules 2 connected to the receiving devices RX, 2 'and one with the delay and modulation modules 2, 2' interconnected switching device 100.
• the receiving devices RX are preferably configured to detect radar signals emitted by the radar sensor RS into the main detection area 20 or into the sub-detection area 30 and to provide corresponding original signals U, U '.
• a receiving device RX arranged in the main detection region 20 generates, for example, an original signal U corresponding to the radar signal detected in the main detection region 20.
• a further one of the receiving devices RX is arranged in the sub-detection region 30 and is configured to generate a further original signal U 'corresponding to the radar signal detected in the sub-detection region 30.
• the original signals U, U ' can each be received and further processed by a time delay and modulation module 2, 2', which are preferably set up to process the original signals U, U 'in such a way that each of the time delay and modulation modules 2, 2 'provided modulated output signals Am, Am' each characterized an emulated object.
• the time delay and modulation modules 2, 2 ' preferably each have a time delay arrangement 200, 200' and a target emulation arrangement 300, 300 'for each object to be emulated.
• a time delay and modulation module 2 having two time delay devices 200 and two target emulation devices 300 is provided for processing the original signal U corresponding to a radar signal detected in the main detection region 20 and providing two corresponding modulated output signals Am.
• time delay and modulation modules 2, 2 ' may also include additional or fewer time delay arrangements 200, 200' and / or target emulation assemblies 300, 300 ', for each corresponding number of objects in the various detection areas 20, 30 of FIG Radar sensor RS to emulate.
• the emulated objects characterized by the output signals Am, Am ' can be represented for the radar sensor RS, in particular from almost any desired directions.
• this signal can be superimposed, in particular, with a further signal which is formed by a radar signal which is detected in the sub-detection area 30 and is subject to a further object to be emulated and which is delayed and modulated.
• time delays with other multiples of J for example 2J or 4J, may also be generated by the time delay devices (200), and switching devices (100) may form any type of matrix, for example 1 x 4 or 2 x 5.
• variable attenuator and / or amplifier device (the interfering signal arrangement) A1 first output signal

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• 2016
  • 2016-12-29 AT ATA51190/2016A patent/AT519540B1/de active
• 2017
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