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公开(公告)号：US20240264303A1
公开(公告)日：2024-08-08
申请号：US18355284
申请日：2023-07-19
发明人： Marek HUSTAVA , Pavel KOSTELNIK
CPC分类号： G01S15/523 , G01S7/53 , G01S7/539
摘要： Breathing sensors, sensing methods, and vehicle occupant monitoring systems may employ ultrasonic transducers. One illustrative sensing method includes: sensing an acoustic transducer's responses to a series of acoustic bursts emitted in a vehicle's cabin; differencing pairs of said responses to obtain difference signals; converting the difference signals into magnitude signals; performing peak detection on each of the magnitude signals to obtain at least one peak amplitude; and providing a breathing signal based on the at least one peak amplitude. The breathing signal may be an occupancy detection flag, an occupant position, a breathing frequency, and/or any combination thereof.
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公开(公告)号：US20220247516A1
公开(公告)日：2022-08-04
申请号：US17585531
申请日：2022-01-26
发明人： Marek HUSTAVA , Tomas SUCHY
摘要： Methods and devices provide for enhanced robustness via graceful packet error detection and packet retransmission. One illustrative sensing method includes: generating a voltage pulse on a signal conductor coupled to a sensor array including one or more active sensors, the voltage pulse representing a broadcast read command (BRC) that defines a frame of one or more time-division-multiple-access (TDMA) slots, one slot for each active sensor to send a data packet; performing current sensing on the signal conductor to receive the data packet from each of the one or more active sensors; determining whether each said data packet is received error free; and requesting retransmission of each said data packet not received error free.
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公开(公告)号：US20210352412A1
公开(公告)日：2021-11-11
申请号：US17156742
申请日：2021-01-25
发明人： Tomas SUCHY , Pavel KOSTELNIK , Marek HUSTAVA
IPC分类号： H04R17/00
摘要： One implementation of a sensing method includes: correlating a receive signal with a first channel waveform template to obtain a first channel correlation signal in which first channel echoes would be represented as peaks; correlating the receive signal with a second channel waveform template to obtain a second channel correlation signal in which second channel echoes would be represented as peaks; and varying the first channel waveform template and the second channel waveform template based on time elapsed from a measurement start time. A sensor array implementation includes: multiple acoustic transducers that operate concurrently to send acoustic bursts in different frequency channels, each of the multiple acoustic transducers configured to use the foregoing method.
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公开(公告)号：US20200326415A1
公开(公告)日：2020-10-15
申请号：US16530693
申请日：2019-08-02
发明人： Marek HUSTAVA , Michal NAVRATIL , Pavel KOSTELNIK
摘要： Sensors, sensor controllers, and sensor control methods may employ an echo- magnification technique to improve threshold-based echo detection. In one illustrative embodiment, a sensor controller includes: a transmitter, a receiver, and a processing circuit coupled to the transmitter and to the receiver. The transmitter drives a piezoelectric element to generate acoustic bursts. The receiver senses a response of the piezoelectric element to echoes of each acoustic burst. The processing circuit is operable to apply echo-detection processing to the response by: identifying an interval of the response representing at least a portion of a potential echo; deriving a modified response from the response by selectively magnifying the response during said interval; and using the modified response to detect an echo.
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公开(公告)号：US20240255600A1
公开(公告)日：2024-08-01
申请号：US18468207
申请日：2023-09-15
发明人： Marek HUSTAVA
CPC分类号： G01S3/46 , B60W40/10 , B60W2420/54 , B60W2554/4049
摘要： A smart ultrasonic integrated-circuit that allows at least one MEMS device to be combined with a piezoelectric transducer in a sensor array module. The sensor array module is capable of additional functionality for an advanced driver assistance system. For example, the MEMS device can add functionality because its wide bandwidth allows for simultaneous detection of audio signals and ultrasonic signals. Accordingly, the sensor array module may provide dual-mode (audio and ultrasonic) sensing in a single module. Additionally the size/cost of a MEMS device allows for the use of a two-dimensional array for receiving ultrasonic echoes which can add a dimension to the ultrasonic range detection for a vehicle.
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公开(公告)号：US20220026976A1
公开(公告)日：2022-01-27
申请号：US17176963
申请日：2021-02-16
发明人： Miroslav STEPAN , Marek HUSTAVA , Tomas SUCHY , Pavel HARTL , Petr KAMENICKY
IPC分类号： G06F1/3234 , G06F1/3212 , G06F1/3215 , G06F1/3287
摘要： A sensor device coupled to a communication interface bus, the sensor device enters a low power mode in which some operations of the sensor device are suspended when the sensor device receives insufficient power over the bus, thereby significantly reducing the likelihood that digital components of the sensor device will need to be reset due to an under-voltage condition.
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公开(公告)号：US20220026472A1
公开(公告)日：2022-01-27
申请号：US17176926
申请日：2021-02-16
发明人： Tomas SUCHY , Miroslav STEPAN , Pavel HARTL , Marek HUSTAVA , Petr KAMENICKY
IPC分类号： G01R19/00 , H03K17/082 , H03K5/08
摘要： A sensor device coupled to a communication interface bus, the sensor device includes: a current source having a first terminal operable to receive a supply current, a second terminal operable to provide a supply current, and a control terminal, wherein an operating voltage is supplied by a current through the current source; a voltage clamp having a first terminal coupled to the second terminal of the current source, a second terminal coupled to a power supply terminal, and an output terminal operable to provide a current sense signal; and a control circuit having an input terminal coupled to the output terminal of the voltage clamp and an output terminal coupled to the control terminal of the current source operable to provide an adjustment signal responsive to the current sense signal, wherein the current source is configured to adjust the current through the current source responsive to the adjustment signal.
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公开(公告)号：US20200271767A1
公开(公告)日：2020-08-27
申请号：US16530654
申请日：2019-08-02
发明人： Marek HUSTAVA , Jiri KANTOR
摘要： Sensors may employ a constant false alarm rate (CFAR) screening process in combination with edge-based echo detection. In one illustrative embodiment, a sensor controller includes: a transmitter, a receiver, and a processing circuit coupled to the transmitter and to the receiver. The transmitter drives a piezoelectric element to generate acoustic bursts. The receiver senses a response of the piezoelectric element to echoes of each acoustic burst. The processing circuit is operable to apply echo-detection processing to the response by: determining a derivative signal from the response; and detecting an echo based at least in part on a peak in the derivative signal indicating a rising and/or falling edge in the response. Signaling to the electronic control unit may specify a time of flight associated with each edge.
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公开(公告)号：US20190079173A1
公开(公告)日：2019-03-14
申请号：US15888543
申请日：2018-02-05
发明人： Jiri KUTEJ , Tomas SUCHY , Marek HUSTAVA , Pavel HORSKY , Zdenek AXMAN
IPC分类号： G01S7/52
摘要： Piezoelectric sensor controllers may facilitate detection and identification of various potential fault states with novel parameter measurements. In an illustrative embodiment of a piezoelectric-based sensor having response-parameter-based fault diagnosis, the sensor includes a piezoelectric transducer and a controller. The controller drives the piezoelectric transducer to generate bursts of acoustic energy and, based on a response of the piezoelectric transducer to said driving, identifies a corresponding transducer state from a set of potential states including multiple transducer fault states. An illustrative embodiment of a sensing method having fault diagnosis, the method includes: driving a piezoelectric transducer to generate a burst of acoustic energy; monitoring a response of the piezoelectric transducer to said driving; identifying, based on said response, a corresponding transducer state from a set of potential states including multiple transducer fault states; and if the transducer state is a fault state, reporting that fault state.
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公开(公告)号：US20190025415A1
公开(公告)日：2019-01-24
申请号：US15888471
申请日：2018-02-05
发明人： Tomas SUCHY , Miroslav KASSA , Marek HUSTAVA
CPC分类号： G01S7/5273 , G01S7/53 , G01S15/104 , G01S15/931 , G01S2015/938
摘要： Composite burst signaling to provide robust multi-channel sensor array performance in systems for parking assistance, blind spot monitoring, and driver assistance. An illustrative method embodiment includes driving an acoustic transducer to send composite acoustic bursts. Each composite acoustic burst includes multiple individual bursts associated with respective frequency bands, the frequency band arrangement providing a source-specific burst signature. The method further includes receiving self-generated echo signals responsive to the composite acoustic bursts from the transducer and potentially including extra echoes responsive to acoustic bursts from other sources; categorizing received echo signals by source based on the burst signature; and using the self-generated echoes exclusive of the extra echoes to determine a distance or time of flight from the transducer.
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