WO2023026667A1 - 信号処理装置、音波システム、及び車両 - Google Patents

信号処理装置、音波システム、及び車両 Download PDF

Info

Publication number
WO2023026667A1
WO2023026667A1 PCT/JP2022/025242 JP2022025242W WO2023026667A1 WO 2023026667 A1 WO2023026667 A1 WO 2023026667A1 JP 2022025242 W JP2022025242 W JP 2022025242W WO 2023026667 A1 WO2023026667 A1 WO 2023026667A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
wave
reflected wave
processing device
received
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.)
Ceased
Application number
PCT/JP2022/025242
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
尚吾 ▲高▼村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rohm Co Ltd
Original Assignee
Rohm Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rohm Co Ltd filed Critical Rohm Co Ltd
Priority to CN202280057615.0A priority Critical patent/CN117859073A/zh
Priority to JP2023543721A priority patent/JP7835768B2/ja
Publication of WO2023026667A1 publication Critical patent/WO2023026667A1/ja
Priority to US18/428,490 priority patent/US20240241251A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G01S15/102—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics
    • G01S15/108—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics using more than one pulse per sonar period
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G01S15/102—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics
    • G01S15/104—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics wherein the transmitted pulses use a frequency- or phase-modulated carrier wave
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
    • G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/524—Transmitters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • G01S7/527—Extracting wanted echo signals
    • G01S7/5273—Extracting wanted echo signals using digital techniques

Definitions

  • the invention disclosed in this specification provides a signal processing device for processing a transmission signal for transmitting sound waves and a reception signal based on reception of sound waves, a sound wave system including the signal processing device, and It relates to a vehicle equipped with the sound wave system.
  • the power (amplitude) of the transmitted wave In order to be able to measure the distance to distant objects, it is necessary to increase the power (amplitude) of the transmitted wave. Since the power (amplitude) of the transmitted wave does not reach the target value at the initial stage of the transmitted wave, a certain number of waves is required to increase the power (amplitude) of the transmitted wave. Also, when the power (amplitude) of the transmitted wave is large, the reverberation time becomes long.
  • the signal processing device disclosed herein includes a transmission signal generation unit configured to generate a transmission signal for transmitting a sound wave, and a reception signal based on reception of the sound wave. and a reflected wave detector configured to detect a reflected wave of the transmitted wave that may be included in the received wave, based on the received wave signal.
  • the transmission signal includes a first signal having a first predetermined number of waves, and a second signal generated after the first signal and having a second predetermined number of waves less than the first predetermined number.
  • the acoustic wave system disclosed in the present specification includes the signal processing device configured as described above and an acoustic wave transmitting/receiving device configured to be directly or indirectly connected to the signal processing device. .
  • the vehicle disclosed in this specification is configured to include the acoustic wave system configured as described above.
  • the distance to an object can be measured regardless of whether the object is located near or far.
  • FIG. 1 is a time chart showing transmitted waves, reverberation, and received waves when the power of transmitted waves is large.
  • FIG. 2 is a time chart showing transmitted waves, reverberation, and received waves when the power of transmitted waves is small.
  • FIG. 3 is a diagram schematically showing a vehicle equipped with an ultrasonic system according to the embodiment and an object.
  • FIG. 4 is a diagram showing the configuration of the ultrasound system according to the embodiment.
  • FIG. 5 is a time chart showing transmitted waves, reverberations, and received waves when an object is located far away.
  • FIG. 6 is a time chart showing transmitted waves, reverberations, and received waves when an object is located far away.
  • FIG. 7 is a diagram for explaining an example of correlation processing.
  • FIG. 8 is a diagram for explaining an example of correlation processing.
  • FIG. 9 is a diagram for explaining an example of a first reflected wave detection unit;
  • the ultrasonic system according to the embodiment described below is assumed to be mounted on a vehicle as an example, and measures the distance between the vehicle and an object to provide an alarm function, an automatic braking function, and an automatic It can be used for parking functions, etc.
  • FIG. 3 shows a vehicle 200 equipped with an ultrasound system 100 (hereinafter referred to as “ultrasound system 100”) according to the embodiment, and an object (obstacle) 300 .
  • Ultrasonic waves transmitted from the ultrasonic system 100 are reflected by the object 300 and received by the ultrasonic system 100 as reflected waves.
  • the ultrasound system 100 also receives environmental noise N.
  • FIG. 1 shows a vehicle 200 equipped with an ultrasound system 100 (hereinafter referred to as “ultrasound system 100”) according to the embodiment, and an object (obstacle) 300 .
  • ultrasonic waves transmitted from the ultrasonic system 100 are reflected by the object 300 and received by the ultrasonic system 100 as reflected waves.
  • the ultrasound system 100 also receives environmental noise N.
  • FIG. 4 is a diagram showing the configuration of the ultrasound system 100. As shown in FIG. 4
  • the ultrasound system 100 includes a signal processing device 1 , a transformer Tr, and an ultrasound transmission/reception device 2 .
  • the ultrasonic transmission/reception device 2 is externally connected to the signal processing device 1 via a transformer Tr.
  • the transformer Tr may not necessarily be provided.
  • the signal processing device 1 is a semiconductor integrated circuit device.
  • the signal processing device 1 includes a DAC (Digital to Analog Converter) 11, a driver 12, an LNA (Low Noise Amplifier) 13, an LPF (Low Pass Filter) 14, an ADC (Analog to Digital Converter) 15, and digital processing It includes a portion 16 and external terminals T1 to T5.
  • DAC Digital to Analog Converter
  • driver 12 an LNA (Low Noise Amplifier) 13
  • LPF Low Pass Filter
  • ADC Analog to Digital Converter
  • the DAC 11 D/A converts the transmission signal output from the transmission signal generation unit 161 included in the digital processing unit 16 from a digital signal to an analog signal, and outputs the signal after D/A conversion to the driver 12 .
  • the output ends of the differential pair of the driver 12 are connected to the primary side of the transformer Tr via external terminals T1 and T2.
  • An ultrasonic transmission/reception device 2 is connected to the secondary side of the transformer Tr.
  • a driver 12 drives the ultrasonic transmission/reception device 2 based on the output signal of the DAC 11 .
  • the ultrasonic transmission/reception device 2 has a piezoelectric element (not shown) and transmits and receives ultrasonic waves. That is, the ultrasonic transmission/reception device 2 functions both as a sound source and as a reception section.
  • the input ends of the differential pair of LNA 13 are connected to the secondary side of transformer Tr via external terminals T3 and T4.
  • the output signal of LNA 13 is supplied to ADC 15 via LPF 14 .
  • the ADC 15 A/D-converts the output signal of the LNA 13 from an analog signal to a digital signal, and outputs the A/D-converted signal to the first reflected wave detection unit 163 and the second reflected wave detection unit 164 included in the digital processing unit 16. output to
  • the LNA 13, LPF 14, and ADC 15 are an example of a received wave signal output unit configured to output a received wave signal based on received ultrasonic waves.
  • the digital processing unit 16 includes a transmission signal generation unit 161, a counter 162, a first reflected wave detection unit 163, a second reflected wave detection unit 164, a first TOF measurement unit 165, a second TOF measurement unit 166, an interface 167;
  • the transmission signal generator 161 is configured to generate a transmission signal for transmitting ultrasonic waves. More specifically, when the transmission signal generator 161 receives a transmission command via an interface 167 from an ECU (Electronic Control Unit) (not shown) mounted on the vehicle 200 (see FIG. 3), the transmission signal including the wave number is received. A wave signal is generated and the transmitted wave signal is output to the DAC 11 .
  • the transmission signals include a first signal having a first predetermined number of waves (for example, 32 waves) and a second signal having a second predetermined number of waves (for example, 4 waves) generated after the first signal and being less than the first predetermined number. 2 signals;
  • the counter 162 starts counting when the transmission signal generation unit 161 starts outputting the first signal.
  • the count value CV of the counter 162 is sent to the first reflected wave detector 163 and the second reflected wave detector 164 .
  • the counter 162 sends a count value indicating the start time of outputting the first signal to the first TOF measurement unit 165 as the time t1_start when transmission corresponding to the first signal is started.
  • the counter 162 sends a count value indicating the start time of outputting the second signal to the second TOF measuring section 166 as the time t2_start when transmission corresponding to the second signal is started.
  • the first reflected wave detection unit 163 detects the reflected wave corresponding to the first signal by comparing the received wave signal output from the ADC 15 with the detection threshold.
  • the first reflected wave detection unit 163 detects the reflected wave corresponding to the first signal when the second reflected wave detection unit 164 does not detect the reflected wave and the received wave signal output from the ADC 15 exceeds the detection threshold. to detect.
  • the first reflected wave detection unit 163 sends a count value indicating the time at which the reflected wave corresponding to the first signal was detected to the first TOF measurement unit 165 as the time t1_detect at which the reflected wave corresponding to the first signal was detected.
  • the second reflected wave detection unit 164 detects the reflected wave corresponding to the second signal by comparing the received wave signal output from the ADC 15 and the detection threshold.
  • the second reflected wave detection unit 164 detects the received wave output from the ADC 15 until the first predetermined time elapses from the time t2_start when the transmission of the wave corresponding to the second signal is started.
  • a reflected wave corresponding to the second signal is detected when the signal exceeds the detection threshold and the received wave signal output from the ADC 15 remains above the detection threshold for less than a second predetermined time. .
  • the second reflected wave detection unit 164 sends a count value indicating the time at which the reflected wave corresponding to the second signal was detected to the second TOF measurement unit 166 as the time t2_detect at which the reflected wave corresponding to the second signal was detected.
  • the first TOF measurement unit 165 calculates the difference between time t1_start and time t1_detect, and measures TOF when the object 300 is located far away.
  • the second TOF measurement unit 166 calculates the difference between the time t2_start and the time t2_detect, and measures the TOF when the object 300 is located nearby. Accordingly, the ultrasound system 100 can measure the distance to the object 300 regardless of whether the object 300 is located near or far.
  • the first reflected wave detection unit 163 detects the first signal. Detect the corresponding reflected wave. Therefore, when the second reflected wave detection unit 164 can detect the reflected wave corresponding to the second signal, the measurement unit configured by the first TOF measurement unit 165 and the second TOF measurement unit 166 detects time t2_start and time t2_detect. is calculated to measure the TOF, the reflected wave corresponding to the second signal cannot be detected by the second reflected wave detection unit 164, and the reflected wave corresponding to the first signal is detected by the first reflected wave detection unit 163. If it can be detected, the difference between time t1_start and time t1_detect is calculated to measure TOF. This enables efficient and correct TOF measurement.
  • the interface 167 conforms to LIN (Local Interconnect Network) as an example, and communicates with an ECU (not shown) mounted on the vehicle 200 (see FIG. 3) via an external terminal T5.
  • LIN Local Interconnect Network
  • the distance to the object 300 can be specified by the TOF and the velocity of the ultrasonic waves transmitted from the ultrasonic transmission/reception device 2 .
  • the measurement results of the first TOF measurement unit 165 and the second TOF measurement unit 166 are sent via the interface 167 to an ECU (not shown) mounted on the vehicle 200 (see FIG. 3).
  • FIG. 5 is a time chart showing transmitted waves, reverberations, and received waves when an object is located far away.
  • FIG. 6 is a time chart showing transmitted waves, reverberations, and received waves when an object is located far away.
  • a transmission wave TW1 in FIGS. 5 and 6 is a transmission wave corresponding to the first signal.
  • the reverberation RVB1 in FIGS. 5 and 6 is the reverberation that occurs immediately after the transmitted wave TW1.
  • a transmission wave TW2 in FIGS. 5 and 6 is a transmission wave corresponding to the second signal.
  • the reverberation RVB2 in FIGS. 5 and 6 is the reverberation that occurs immediately after the transmitted wave TW2.
  • a received wave RW1 in FIGS. 5 and 6 is a received wave corresponding to the first signal.
  • a received wave RW2 in FIGS. 5 and 6 is a received wave corresponding to the second signal.
  • the maximum amplitude of the transmission wave TW1 is larger than the maximum amplitude of the transmission wave TW2. As a result, sufficient power of the transmitted wave TW1 can be secured, so that the ultrasonic system 100 can more reliably measure the distance to the object 300 regardless of whether the object 300 is located near or far.
  • the transmission signal generator 161 be configured to generate the second signal after the reverberation RVB1 following the first signal ends.
  • the end of the reverberation RVB1 may be actually confirmed by the transmission signal generation unit 161 based on the output of the LNA 13, and the transmission signal is generated at a time when it can be estimated that the reverberation RVB1 has definitely ended by experiments, simulations, or the like.
  • the unit 161 may store in advance. By generating the second signal after the reverberation RVB1 that follows the first signal ends, the ultrasound system 100 can determine the distance to the object 300 whether the object 300 is located near or far. can be measured more reliably.
  • the reflected wave is detected by comparing the reflected wave with the detection threshold, but the reflected wave may be detected by correlation processing.
  • reference data Dref is prepared in advance.
  • the reference data Dref is waveform data of a reflected wave expected to be received, and is waveform data having the same frequency as the frequency of the sound wave to be transmitted.
  • the frequency of the received reflected wave Rs1 shown in FIG. 7 is the same as the transmission frequency. Therefore, in the correlation result C1 obtained by the correlation processing of multiplying the reference data Dref and the reflected wave Rs1, the correlation value is always a positive value as shown in FIG. As a result, the convolution integral value obtained by temporally integrating the correlation result C1 becomes large, and the reflected wave is emphasized.
  • the frequency of the received environmental noise N (see FIG. 3) shown in FIG. 8 is shifted from the transmission frequency. That is, the frequency of the environmental noise N deviates from the frequency of the reference data Dref. Therefore, as shown in FIG. 8, in the correlation result C2, there is a period in which the correlation value is negative, and the convolution integral value is smaller than in FIG. In this way, it is possible to distinguish between transmitted and reflected waves and environmental noise.
  • the first reflected wave detection unit 163 of the ultrasound system 100 When the first reflected wave detection unit 163 of the ultrasound system 100 is modified so as to detect the reflected wave corresponding to the first signal by correlation processing, the first reflected wave detection unit 163 has the configuration shown in FIG. 9, for example.
  • the first reflected wave detection unit 163 in the example shown in FIG. 9 includes a reference data storage unit 163A, a correlation processing unit 163B, a correlation value summation unit 163C, and a threshold determination unit 163D.
  • the reference data storage unit 163A is configured to store reference data corresponding to the first signal.
  • a register can be used for the reference data storage unit 163A.
  • the correlation processing unit 163B performs correlation processing based on the received wave signal output from the ADC 15 and the reference data stored in the reference data storage unit 163A at a predetermined cycle.
  • the correlation value summation unit 163C outputs a correlation convolution integral value by calculating the sum of the correlation processing results by the correlation processing unit 163B.
  • the correlation convolution integral value to be output may be a value obtained by truncating a negative value such that the negative value of the calculated result is 0.
  • the threshold determination unit 163D compares the correlation convolution integral value with a predetermined threshold. Threshold determination section 163D detects a reflected wave corresponding to the first signal when the correlation convolution integral value becomes greater than a predetermined threshold.
  • An example of the second reflected wave detection section 164 is the same as an example of the first reflected wave detection section 163 .
  • the second reflected wave detector 164 uses reference data corresponding to the second signal instead of reference data corresponding to the first signal.
  • the ultrasonic system 100 that transmits ultrasonic waves (sound waves with a high frequency exceeding audible sound) has been described, but the present invention is also applicable to a sound wave system that transmits sound waves other than ultrasonic waves. can do.
  • the signal processing apparatus (1) described above includes a transmission signal generator (161) configured to generate a transmission signal for transmitting a sound wave, and a reception signal based on the reception of the sound wave. and a reflected wave configured to detect a reflected wave of the transmitted wave that may be included in the received wave, based on the received wave signal. and wave detectors (163, 164), wherein the transmitted wave signal comprises a first signal having a first predetermined number of waves, and a second predetermined wave number generated after the first signal and less than the first predetermined number. and a second signal having a wave number of .
  • the signal processing device having the first configuration described above makes it possible to measure the distance to an object regardless of whether the object is located near or far. Note that the measurement of the distance to the object may be performed outside the signal processing device, or may be performed inside the signal processing device.
  • the maximum amplitude of the transmitted wave corresponding to the first signal is greater than the maximum amplitude of the transmitted wave corresponding to the second signal (second configuration), good too.
  • the signal processing device having the second configuration above makes it possible to more reliably measure the distance to the object regardless of whether the object is positioned near or far.
  • the transmission signal generation unit is configured to generate the second signal after the reverberation following the first signal ends (the 3 configuration).
  • the signal processing device having the third configuration above makes it possible to more reliably measure the distance to the object regardless of whether the object is located near or far.
  • a measurement unit is provided, and when the reflected wave detection unit detects the reflected wave corresponding to the second signal, A time from the transmission wave corresponding to the second signal to detection of the reflected wave corresponding to the second signal is measured, and the reflected wave detection unit cannot detect the reflected wave corresponding to the second signal. and a time from the transmitted wave corresponding to the first signal to the detection of the reflected wave corresponding to the first signal when the reflected wave corresponding to the first signal is detected by the reflected wave detection unit. may be configured to measure the (fourth configuration).
  • the signal processing device having the above fourth configuration can efficiently measure the correct TOF.
  • the reflected wave detector detects the reflection of the transmitted wave that may be included in the received wave, based on the correlation between the received wave signal and reference data.
  • a configuration configured to detect waves may be used.
  • the signal processing device having the fifth configuration can improve robustness against environmental noise.
  • the frequency of the first signal and the frequency of the second signal may be different from each other (sixth configuration).
  • the signal processing device having the sixth configuration can suppress erroneous measurement of TOF.
  • the sound wave system (100) described above includes a signal processing device having any one of the first to sixth configurations, and a sound wave transmitting/receiving device (2) configured to be directly or indirectly connected to the signal processing device. ) and (seventh configuration).
  • the sound wave system of the seventh configuration can measure the distance to the object whether the object is located near or far.
  • the vehicle (200) described above has a configuration (eighth configuration) including the sound wave system of the seventh configuration.
  • the distance to the object measured by the sound wave system can be used regardless of whether the object is located near or far.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
PCT/JP2022/025242 2021-08-25 2022-06-24 信号処理装置、音波システム、及び車両 Ceased WO2023026667A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202280057615.0A CN117859073A (zh) 2021-08-25 2022-06-24 信号处理装置、声波系统和车辆
JP2023543721A JP7835768B2 (ja) 2021-08-25 2022-06-24 信号処理装置、音波システム、及び車両
US18/428,490 US20240241251A1 (en) 2021-08-25 2024-01-31 Signal processing device, sound wave system, and vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-136764 2021-08-25
JP2021136764 2021-08-25

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/428,490 Continuation US20240241251A1 (en) 2021-08-25 2024-01-31 Signal processing device, sound wave system, and vehicle

Publications (1)

Publication Number Publication Date
WO2023026667A1 true WO2023026667A1 (ja) 2023-03-02

Family

ID=85322721

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/025242 Ceased WO2023026667A1 (ja) 2021-08-25 2022-06-24 信号処理装置、音波システム、及び車両

Country Status (4)

Country Link
US (1) US20240241251A1 (https=)
JP (1) JP7835768B2 (https=)
CN (1) CN117859073A (https=)
WO (1) WO2023026667A1 (https=)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012220435A (ja) * 2011-04-13 2012-11-12 Panasonic Corp 物体検知装置
JP2014035323A (ja) * 2012-08-10 2014-02-24 Rohm Co Ltd 送信回路、半導体装置、超音波センサ、車両
US20200233071A1 (en) * 2019-01-23 2020-07-23 Semiconductor Components Industries, Llc Detection of noise-induced ultrasonic sensor blindness
JP2020148701A (ja) * 2019-03-15 2020-09-17 ローム株式会社 音波処理装置、および超音波システム

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6413623B2 (ja) * 2014-10-22 2018-10-31 株式会社Ｓｏｋｅｎ 障害物検出装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012220435A (ja) * 2011-04-13 2012-11-12 Panasonic Corp 物体検知装置
JP2014035323A (ja) * 2012-08-10 2014-02-24 Rohm Co Ltd 送信回路、半導体装置、超音波センサ、車両
US20200233071A1 (en) * 2019-01-23 2020-07-23 Semiconductor Components Industries, Llc Detection of noise-induced ultrasonic sensor blindness
JP2020148701A (ja) * 2019-03-15 2020-09-17 ローム株式会社 音波処理装置、および超音波システム

Also Published As

Publication number Publication date
JPWO2023026667A1 (https=) 2023-03-02
US20240241251A1 (en) 2024-07-18
JP7835768B2 (ja) 2026-03-25
CN117859073A (zh) 2024-04-09

Similar Documents

Publication Publication Date Title
CN209894972U (zh) 声学距离测量电路
US10663568B2 (en) Composite acoustic bursts for multi-channel sensing
CN107167808B (zh) 用于声学距离飞行时间补偿的电路
CN107064939B (zh) 用于声距测量的电路
US11644555B2 (en) Threshold generation for coded ultrasonic sensing
CN105474039B (zh) 用于运行车辆的周围环境检测系统的方法
CN111413699B (zh) 用于低频调制(lfm)啁啾信号的声学距离测量电路和方法
JP2009265009A (ja) 超音波計測装置
WO2009125843A1 (ja) 超音波伝搬時間測定システム
US11982740B2 (en) Motion-compensated distance sensing with concurrent up-chirp down-chirp waveforms
CN105745556A (zh) 用于借助声传感器测量相对速度的方法和设备
JP2005106603A (ja) パルス波レーダー装置
WO2023026667A1 (ja) 信号処理装置、音波システム、及び車両
US20110288795A1 (en) Method and system for determining the time-of-flight of an acoustic signal
US20240329240A1 (en) Signal Processing Device, Sonic System and Vehicle
JP5784789B1 (ja) 車両用障害物検出装置
JP7835767B2 (ja) 信号処理装置、音波システム、及び車両
US12535579B2 (en) Object detection device and object detection system
JP2023031336A (ja) 信号処理装置、音波システム、及び車両
EP1295092B1 (en) Arrangement and method for measuring the speed of sound
JP7807446B2 (ja) 音波処理装置、および超音波システム
JP2007170975A (ja) 物体検知装置
JP2020060410A (ja) 音波処理装置、および超音波システム
JP2024119191A (ja) 信号処理装置、音波システム、及び車両
WO2024180890A1 (ja) 信号処理装置、音波システム、及び車両

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22860961

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2023543721

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 202280057615.0

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22860961

Country of ref document: EP

Kind code of ref document: A1