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公开(公告)号：US11982776B2
公开(公告)日：2024-05-14
申请号：US17522019
申请日：2021-11-09
Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Inventor： Marek Hustava , Jiri Kantor , Tomas Suchy
IPC: G01S7/52 , G01S7/526 , G01S15/931
CPC classification number: G01S7/52006 , G01S7/526 , G01S15/931
Abstract: Disclosed sensors, sensor controllers, and sensor control methods enhance transducer performance using a model-based equalization method that can be performed in the field. One illustrative method for operating a piezoelectric-based sensor includes: sensing a response of a piezoelectric transducer as a function of frequency; deriving parameter values of an equivalent circuit for the piezoelectric transducer from the response; using a squared magnitude of the equivalent circuit's transfer function to determine a system level selectivity; and adapting at least one operating parameter of the sensor based on the system level selectivity. One illustrative controller for a piezoelectric transducer includes: a transmitter that drives the piezoelectric transducer; a receiver that senses a response of the piezoelectric transducer; and a processing circuit coupled to the transmitter and to the receiver to calibrate the transducer using the foregoing method.
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公开(公告)号：US11163048B2
公开(公告)日：2021-11-02
申请号：US16724783
申请日：2019-12-23
Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Inventor： Tomas Suchy , Jiri Kantor , Marek Hustava
IPC: G01S7/527 , G01S15/931 , G01S15/10 , G01S7/53
Abstract: Various sensors, sensor controllers, and sensor control methods are provided with model-based sideband balancing. In one illustrative embodiment, a controller for a piezoelectric transducer includes a transmitter, a receiver, and a processing circuit coupled to the transmitter and receiver. The processing circuit performs calibration and echo detection, the calibration including: sensing the piezoelectric transducer's phase response as a function of frequency; deriving equivalent circuit parameters for the piezoelectric transducer from the phase response; and determining a sideband imbalance based on one or more of the equivalent circuit parameters. Once the sideband imbalance is identified, the processing circuit may perform echo-detection processing that accounts for the sideband imbalance.
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公开(公告)号：US11353567B2
公开(公告)日：2022-06-07
申请号：US16530654
申请日：2019-08-02
Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Inventor： Marek Hustava , Jiri Kantor
Abstract: 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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