EP4370948A1 - Prüfvorrichtung zum test eines mit elektromagnetischen wellen arbeitenden abstandssensors - Google Patents
Prüfvorrichtung zum test eines mit elektromagnetischen wellen arbeitenden abstandssensorsInfo
- Publication number
- EP4370948A1 EP4370948A1 EP22751027.8A EP22751027A EP4370948A1 EP 4370948 A1 EP4370948 A1 EP 4370948A1 EP 22751027 A EP22751027 A EP 22751027A EP 4370948 A1 EP4370948 A1 EP 4370948A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- received
- srx
- time
- delay
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
- G01S7/4056—Means for monitoring or calibrating by simulation of echoes specially adapted to FMCW
-
- 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
- G01S7/406—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
- G01S7/4069—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 RF signal injection
-
- 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
Definitions
- Test device for testing a distance sensor working with electromagnetic waves
- the invention relates to a test device for testing a distance sensor that works with electromagnetic waves in the form of at least one temporally related and temporally limited sensor signal, with a receiving element for receiving an electromagnetic free space wave as the received signal, with a radiating element for radiating an electromagnetic output signal, with simulation operation, the received signal or a received signal derived from the received signal is routed via a signal processing unit with a definable time delay and is thus time-delayed to form a time-delayed signal as a simulated reflection signal, with the time-delayed signal or a time-delayed signal derived from the time-delayed signal being used as a Output signal is emitted via the Ab radiating element.
- the invention also relates to a method for operating the test device described above.
- test devices for testing distance sensors and methods for operating such test devices are known from various technical areas and fields of application, for example from the area of control unit development and control unit testing, in particular in the automotive field, reference is made, for example, to WO 2020/165191 A1 .
- Another field of application is end-of-line test benches, i.e. devices that serve to check products at the end of a production line, here checking distance sensors.
- the present case is about testing distance sensors that work with electromagnetic waves. Radar sensors are predominantly used in the automotive sector. In principle, however, distance sensors can also be tested that work in a different frequency range of electromagnetic waves, for example in the visible light range, or that work with electromagnetic radiation sources that emit electromagnetic waves with a long coherence length, such as in laser applications (e.g. lidar ).
- Distance sensors of the type considered here basically work in such a way that the electromagnetic waves they emit are reflected by an object in the emission range of the distance sensor, the distance sensor receives the reflected electromagnetic waves and determines the distance to the object from the propagation time of the electromagnetic waves .
- the signal propagation time can be determined directly (time-of-flight measurement), but it is often done indirectly via clever signal evaluations. While very short sensor signals are often used in the first case, ie pulses, in the latter case transmission signals that are recognizable over time are usually used. An example would be frequency-modulated continuous wave signals.
- the test device To test the distance sensor, the test device is positioned in its emission area, the test device receives the free space waves emitted by the distance sensor and delays this received signal with its signal processing unit according to a specified time delay and then emits the time-delayed signal via its Ab radiating element back in the direction the distance sensor to be tested, which gives the distance sensor the impression of an object removed according to the set time delay.
- distance sensors are considered that work with temporally related and temporally limited sensor signals. It is known in the prior art to implement such a signal, for example, as a chirp signal (“chirp” for short), ie as a sinusoidal signal whose frequency changes as a function of time. Realizations with other types of modulation are also conceivable.
- Some distance sensors emit a large number, for example 128 or 256, of such time-limited chirps, with short transmission pauses between the chirps. Such a sequence of several chirps following one another at short intervals is followed by a longer transmission pause for signal processing.
- the chirp sequence including the transmission pauses is also referred to as a frame.
- a frame repetition rate of a few tens of Hertz is currently typically used for a continuous measurement.
- the distance sensor to be tested can obtain a measured distance value from each individual chirp signal sent out. This is done by mixing the part of the chirp signal that is still being sent out with the part of the chirp signal that is reflected and already received again.
- the signal propagation time and thus the distance information is obtained from the frequency of the mixed signal. If the object from which the emitted chirp signals are reflected has a radial movement component relative to the distance sensor, then the mixed signals of successive chirps have phase differences which are determined and from which speed information with regard to the radial movement component can be obtained directly can and will be won.
- the object of the present invention is to design the testing device described above and the method described above in such a way that the error situations known from the prior art are avoided.
- test device described at the outset and the method for operating such a test device described at the outset provide for the signal processing unit to process a received temporally related and temporally limited sensor signal or a received temporal sensor signal derived from the received sensor signal coherent and time-limited sensor signal in a delay step completely processed with that specified time delay as a constant working time delay to form a time-delayed sensor signal, which specified time delay was specified at the beginning of the delay step and thus the processing of the received NEN time-limited sensor signal, even if the predefinable time delay during the delay step and thus during the ongoing processing of the received sensor signal or of the em derived from the received sensor signal received sensor signal changes.
- the solution according to the invention therefore consists in completing a delay step once started, which is based on a specific predetermined time delay, even with this time delay, which is maintained as a constant work-time delay, even if there has been a change in the meantime a new definable time delay has been set or has been preset.
- a sensor signal to be delayed is treated completely with a uniform working time delay. It has been found that the problems in evaluating the simulated reflection signals in the distance sensor can be eliminated almost completely if the testing device is configured as described above or the testing device is operated using the correspondingly configured method.
- reception signal In the present case, a conceptual distinction is always made between the reception signal and the reception signal derived from the reception signal.
- the reception signal itself goes back to that of the receiving element free space wave recorded by the test device. If further signal processing takes place before the received signal is forwarded to the signal processing unit, then strictly speaking it is no longer the received signal itself, but a received signal derived from it. This is the case, for example, when the received signal is downconverted to a lower intermediate frequency, which reduces the demands on the technical implementation of the signal transmission paths and also on the speed of signal processing.
- this also applies to the time-delayed signal or the time-delayed signal derived from the time-delayed signal, without this requiring any further explanation.
- a preferred embodiment of the testing device is characterized in that the ongoing processing of the received sensor signal or of the received sensor signal derived from the received sensor signal is detected in the delay step in that the signal processing unit checks the signal level or the signal power of the received signal or of the received signal derived received signal and, if a predetermined active threshold value for the signal level or the signal power is exceeded by the determined signal level or the determined signal power, a conclusion is drawn as to the ongoing processing of the received sensor signal or of the sensor signal derived from the received sensor signal.
- the active threshold value for the signal level or the signal power should be selected in such a way that the signal noise present in the operating environment of the test device, which is never entirely avoidable, can be clearly distinguished from a useful signal that is present.
- a further preferred embodiment of the testing device is characterized in that the signal processing unit detects the start of the delay step and thus the ongoing processing of the received sensor signal or of the received sensor signal derived from the received sensor signal when the specified active
- the threshold value for the signal level or the signal power is exceeded by the determined signal level or the determined signal power for a given active time period. This procedure makes it possible to detect interference signals that may exceed the active threshold rise, but only last for a very short time, can be reliably distinguished from useful signals that are to be delayed.
- the end of the delay step or the absence of the delay step can also be detected.
- the end of the delay step and thus the lack of continuous processing of the received sensor signal or of the received sensor signal derived from the received sensor signal is detected by the signal processing unit measuring the signal level or the signal power of the received signal or the received signal derived from the received signal and, if the signal level or the signal power determined falls below a predetermined passive threshold value for the signal level or the signal power, the non-existent processing of the received sensor signal or the received sensor signal derived from the received sensor signal sensor signal closes.
- the active and the passive threshold can be chosen identically.
- the active threshold value is selected to be greater than the passive threshold value in order to achieve a certain hysteresis effect.
- a passive time period can also be defined for recognizing the end of the delay step or the absence of the delay step. It is then provided that the signal processing unit detects the end of the delay step and thus the end of the ongoing processing of the received sensor signal of the received sensor signal derived from the received sensor signal when the predetermined passive threshold value for the signal level or the signal power exceeds the determined signal level or the determined signal power is undershot for a specified passive period of time.
- the active time period and/or the passive time period is selected or is longer than the pauses between successive sensor signals of a related sequence of sensor signals, in particular of related sensor signals of a radar frames.
- Appropriate selection of the detection periods can ensure that a switchover to a new predetermined value for the time delay is only carried out when the transmission sequence for the successive sensor signals of a radar frame has been completely completed. A switchover to a new value for the specified time delay is then only made during the long transmission break of a radar frame.
- the distance sensor to be tested evaluates the recorded data of a radar frame in its entirety, whereby all received - and mixed - sensor signals are evaluated individually (distance information) and once for all of the received - and mixed - sensor signals a phase evaluation is carried out (speed information).
- Also claimed is a computer program with instructions which, when executed with a signal processing unit of a testing device for testing a distance sensor working with electromagnetic waves in the form of at least one temporally related and temporally limited sensor signal, cause the signal processing unit and thus the testing device to carry out the procedures described.
- FIG. 1 schematically shows a known testing device and a known method for testing a distance sensor that works with electromagnetic waves
- Fig. 2 a temporally related and time-limited sensor signal in the form of a chirp
- 3 shows a coherent chirp sequence (frame)
- 4 shows a received temporally coherent and temporally limited sensor signal and the signal delayed in accordance with a predetermined time delay
- FIG. 7 shows a received temporally related and temporally limited sensor signal and the time-delayed signal simulated according to a predefined time delay with a predefined new time delay that has been changed in the ongoing delay step and is taken into account for the time delay, with a resulting phase shift
- FIG. 8 shows a schematic of the evaluation of simulated reflection signals without phase jump and with phase jump in the distance sensor and
- Fig. 9 shows schematically the time delay of a received temporally related and temporally limited sensor signal with a constant predetermined time delay despite changing the predetermined time delay during the delay step to avoid phase jumps in the simulated reflection signal.
- testing device 1 for testing a distance sensor 2 working with electromagnetic waves in the form of at least one temporally related and temporally limited sensor signal and a method 10 for operating a corresponding testing device 1 .
- the distance sensor 2 emits an electromagnetic free space wave in the direction of the testing device 1 and receives a simulated electromagnetic reflection signal S TX generated by the testing device 1 .
- the testing device 1 has a receiving element 3 and for radiating the simulated electromagnetic reflection signal S TX has the Test device 1 on a radiating element 4.
- the distance sensor 2 per se is not part of the test device 1, but it is important to understand how the test device 1 interacts with the distance sensor 2.
- the received signal S RX or a signal S' RX derived from the received signal S RX is routed via a signal processing unit 5, with the signal processing unit 5 being able to specify a time delay in a specific range.
- the input signal of the time delay circuit 5 is thus time-delayed to a time-delayed signal S deiay .
- the time-delayed signal S deiay or a signal S'deiay derived from the time-delayed signal S deiay is then emitted as the simulated reflection signal S TX via the radiating element 4 .
- the time delay to be achieved t deiay,soll is fed to the signal processing unit 5 as information.
- the technical implementation is not important as to how the signal processing unit 5 is supplied with this information.
- the specification for the time delay to be set will come from an environment simulator that simulates the scene to be simulated with environment objects and has corresponding position, speed, and/or acceleration information about the environment objects ready. If, for example, it is known that the distance between the object to be simulated and the distance sensor to be tested is 30 m, a corresponding time delay is calculated as the signal propagation time of an electromagnetic wave, taking into account the speed of light, and the time delay t deiay,soll is specified.
- a temporally related and temporally limited sensor signal as a received signal S RX of the testing device 1. It is assumed here that the distance sensor 2 to be tested emits signals of this type.
- a chirp signal in short: chirp—is shown here, which is a frequency-modulated signal. In the present case, the frequency of a sine wave increases in a defined manner over time. This chirp is then present in the test device 1 as a received sensor signal S RX and also runs continuously and therefore without phase jumps.
- the signal has a time-limited scope, so it is a time-limited wave packet.
- 3 shows a sequence of several chirps which follow one another in a time-defined manner, namely are spaced apart from one another by a short transmission pause followed by a long transmission pause, which is the case with distance sensors 2 usually used for signal processing.
- each chirp received as a reflection signal is usually evaluated for a measured distance value, ie also each individual chirp of a chirp frame. Radial velocity information is calculated by evaluating the phase position of chronologically consecutive chirps in relation to one another.
- the basic functioning of the test device 1 and the method 10 is shown in FIG. 4 .
- the testing device 1 receives the temporally related and temporally limited sensor signal as a reception signal SRX, which is shown here as a sine wave for the sake of simplicity. If in the testing device 1 a time delay t de - lay. soii, is specified, then the received sensor signal S RX is time-delayed by the signal processing unit 5 by exactly this time delay value t deiay, soll .
- FIG. 5 shows the evaluation of a measurement sequence based on the evaluation of a chirp frame in a distance sensor 2 . It can be seen here that an object has been detected at a distance R with only a small range of fluctuation and this object has a relative, radial velocity component v, which is likewise hardly subject to any fluctuation. This result is plausible. If, for example, it is assumed that a complete chirp sequence of a frame is sent out in a few tens of milliseconds, i.e.
- FIG. 6 shows another distance-speed diagram as a representation of the evaluation of a chirp sequence by a distance sensor 2, which has been obtained by evaluating reflection signals simulated by means of the test device 1. It can be seen that an object has been detected at an almost constant distance, but that the speed information scatters over a very wide range. The speed values determined by the distance sensor 2 scatter, although in the present case the test device 1 works with a constant speed v to be simulated. It is therefore questionable how this apparent incorrect evaluation comes about and how it can be avoided.
- FIG. 7 The effects of the described procedure are shown in FIG. 7.
- the received temporally coherent and time-limited sensor signal SRX is shown, here again in the form of a sinusoidal wave packet.
- the lower diagram shows the time-delayed signal S eiay , ie the simulated reflection signal.
- the specified time delay t eiay,soll is present, which is then used in the delay step 6 as the work time delay tdeiay,work.
- a new value for the time delay t deiay, soll is newly specified and also used directly as the work time delay tdeiay,work.
- Fig. 8 is used to explain the problems in evaluating the simulated reflection signals with discontinuities in a distance sensor 2. Shown are three generated in the distance sensor 2 mixed signals S Mi , S M 2, S M 3, each based on the mixture of a transmitted chirp with the simulated reflected chirp generated by the testing device 1 and received back by the distance sensor 2.
- the mixed signals SMI, SM2, SM3 are harmonic oscillations with an essentially fixed frequency.
- the time extension of each chirp or each mixed signal S Mi , S M 2 , S M 3 is shown running from left to right along a first time axis.
- the successive chirps or the mixed signals SMI, SM2, SM3 based on successive chirps are shown in chronological succession along the second time axis.
- each mixed signal SMI, SM2, SM3 is subjected to a frequency analysis and distance information is thus obtained from each mixed signal SMI, SM2, SM3.
- the different mixed signals SMI, SM2, SM3 that follow one another in time have a certain time offset and thus a phase offset f, which is determined by a Fourier analysis of the data set in the direction of the second time axis.
- the first two mixed signals S Mi , SM2 are constant waveforms that are based on mixing two undisturbed and also constant chirp signals.
- the simulated reflection signal generated by the testing device 1 has a phase jump, as has been explained with reference to FIG predetermined time delays t deiay, soll and t deiay, soll, have been used as new working time delays t deiay, work .
- the phase jump in the simulated reflection signal generated is of course transferred to the mixed signal S M 3 , as can be seen in FIG. This results in different phase values f in the evaluation and in correspondingly different speed values that result from the phase values. This explains the problems found when evaluating the corresponding signals in the distance sensors 2.
- Received temporally related and temporally limited sensor signal S'RX in a delay step 6 completely with that predetermined time delay t deiay is to be processed as a constant work time delay t deiay, work into a time-delayed sensor signal S deiay , which predetermined time delay t de - i ay , should be specified at the beginning of the delay step 6 and thus the processing of the received time-limited sensor signal SRX, even if the definable time delay t deiay, should during the delay step 6 and thus the ongoing processing of the received sensor signal SRX o that of the received sensor signal S'RX derived from the received sensor signal SRX changes.
- time delay t de i ay, soll newly specified during delay step 6 is blocked for as long as it can be used as the new specification for the signal delay, and is therefore not the basis for the calculation of the time-delayed simulated reflection signal is placed until the delay step 6 is completed based on the old predetermined time delay t deiay,soll . Only then is the new time delay t deiay, soll already specified during the time delay step used as the work time delay t deiay, work.
- the testing device 1 shown in the figures and the method 10 shown are characterized in that the ongoing processing of the received sensor signal SRX or of the received sensor signal S'RX derived from the received sensor signal SRX is detected in delay step 6 in that the signal processing unit 5 determines the signal level A or the signal power P of the received signal SRX or the received signal S'RX derived from the received signal SRX and when a predetermined active threshold value ASW for the signal level or the signal power is exceeded by the determined signal level A or the determined signal power P to the still ongoing processing of the received sensor signal SRX or of the received sensor signal SRX derived from the received sensor signal S'RX concludes ((P(SRX) VA(SRX))>ASW).
- the test device 1 shown in the figures and the method 10 shown are implemented in such a way that the signal processing unit 5 starts the delay step 6 and thus the start of the ongoing processing of the received sensor signal SRX or of the received sensor signal derived from the received sensor signal SRX S'RX detects when the specified active threshold value ASW for the signal level or the signal power is exceeded by the determined signal level A or by the signal power P determined for a specified active period, which is not shown in detail here.
- the testing device 1 shown in the figures and the method 10 shown also have in common that the end of the delay step 6 and thus the lack of ongoing processing of the received sensor signal SRX or of the received sensor signal S'RX derived from the received sensor signal SRX is thereby detected is that the signal processing unit 5 determines the signal level A or the signal power P of the reception signal S RX or of the reception signal S RX derived from the reception signal S'RX and falls below a predetermined passive threshold value PSW for the signal level or the signal power by the determined signal level A or the determined signal power P on the non-existent processing of the received sensor signal SRX or derived from the received sensor signal S RX received Sensorsi signal S'RX closes.
- the test device 1 and the method 10 shown in the figures are also designed such that the signal processing unit 5 signals the end of the delay step 6 and thus the end of the ongoing processing of the received sensor signal S RX or of the received sensor signal SRX derived from the received Sensor signal S'RX detects when the predetermined passive threshold value PSW for the signal level or the signal power is undershot by the determined signal level A or the determined signal power P for a predetermined passive time period t p ((P(SRX) v A(SRX)) ⁇ PSW).
- the passive period t P has the length of the specified time delay t eiay, set point , which has been used during the delay step 6 as the work time delay t deiay, work .
- the passive time period tp has been selected to be longer than the pauses between successive sensor signals of a related sequence of sensor signals, namely of related sensor signals of a radar frame. This means that a change to a new, specified time delay tdeiay, is only possible as an effective work time delay tdeiay, work until the sensor signals of a completely new radar frame are received.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021118333.2A DE102021118333A1 (de) | 2021-07-15 | 2021-07-15 | Prüfvorrichtung zum Test eines mit elektromagnetischen Wellen arbeitenden Abstandssensors |
| PCT/EP2022/069437 WO2023285451A1 (de) | 2021-07-15 | 2022-07-12 | Prüfvorrichtung zum test eines mit elektromagnetischen wellen arbeitenden abstandssensors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4370948A1 true EP4370948A1 (de) | 2024-05-22 |
Family
ID=82799887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22751027.8A Pending EP4370948A1 (de) | 2021-07-15 | 2022-07-12 | Prüfvorrichtung zum test eines mit elektromagnetischen wellen arbeitenden abstandssensors |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20240385289A1 (de) |
| EP (1) | EP4370948A1 (de) |
| JP (1) | JP2024527406A (de) |
| CN (1) | CN117642648A (de) |
| DE (1) | DE102021118333A1 (de) |
| WO (1) | WO2023285451A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1020020A (ja) * | 1996-06-27 | 1998-01-23 | Kokusai Electric Co Ltd | 高周波信号の遅延装置、電波高度計の地上試験装置 |
| JP3242594B2 (ja) * | 1997-04-09 | 2001-12-25 | 三菱電機株式会社 | チャープ変調方式レーダ用試験信号発生装置 |
| JP5194980B2 (ja) * | 2008-04-14 | 2013-05-08 | 日産自動車株式会社 | 距離計測装置の検査装置 |
| DE102008062930A1 (de) | 2008-06-13 | 2009-12-17 | Rohde & Schwarz Gmbh & Co. Kg | Verfahren zum Testen eines Transponders für den Flugfunk und Messsystem |
| AT519540B1 (de) | 2016-12-29 | 2018-10-15 | Avl List Gmbh | Schaltvorrichtung für einen Radarzielemulator und Radarzielemulator mit einer solchen Schaltvorrichtung |
| EP3924750B1 (de) | 2019-02-11 | 2024-05-29 | dSPACE GmbH | Prüfvorrichtung zum test eines mit elektromagnetischen wellen arbeitenden abstandssensors |
| US11686814B2 (en) * | 2020-12-07 | 2023-06-27 | Keysight Technologies, Inc. | Frequency modulated continuous wave (FMCW) radar target emulation with synchronized modulation reflection devices |
-
2021
- 2021-07-15 DE DE102021118333.2A patent/DE102021118333A1/de active Pending
-
2022
- 2022-07-12 JP JP2024501980A patent/JP2024527406A/ja active Pending
- 2022-07-12 EP EP22751027.8A patent/EP4370948A1/de active Pending
- 2022-07-12 WO PCT/EP2022/069437 patent/WO2023285451A1/de not_active Ceased
- 2022-07-12 US US18/578,334 patent/US20240385289A1/en active Pending
- 2022-07-12 CN CN202280049884.2A patent/CN117642648A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021118333A1 (de) | 2023-01-19 |
| US20240385289A1 (en) | 2024-11-21 |
| WO2023285451A1 (de) | 2023-01-19 |
| JP2024527406A (ja) | 2024-07-24 |
| CN117642648A (zh) | 2024-03-01 |
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