TIME OF FLIGHT DETECTION SYSTEMS WITH EFFICIENT PHASE MEASUREMENT

    公开(公告)号:US20240230902A9

    公开(公告)日:2024-07-11

    申请号:US18546124

    申请日:2022-09-16

    Inventor: Ashley Wise

    CPC classification number: G01S17/36 G01S7/4915 G01S7/4918

    Abstract: Apparatus and associated methods relate to a select frequency phase measurement (SFPM) time of flight (TOF) system including an emitter and a receiver. The emitter may generate a modulated emitted signal by at least one frequency. The emitted signal may, for example, be a pulsed light signal. The receiver may generate a signal in response to receiving a reflection of the emitted signal off a target object. An ADC element may digitize a signal generated by the receiving element, and a reference signal generated by a monitored signal of the modulated emitted signal. A processing element may generate a phase signal using single frequency analysis of the digitized signals. A distance measurement signal may be generated as a function of the phase signal. Various embodiments may, for example, advantageously enable sub-millisecond sensor response times using commodity processing elements.

    Fill sensor
    2.
    外观设计

    公开(公告)号:USD1039406S1

    公开(公告)日:2024-08-20

    申请号:US29871181

    申请日:2023-02-14

    Abstract: FIG. 1 is a front perspective view of a fill sensor showing the new design;
    FIG. 2 is a rear perspective view of the fill sensor of FIG. 1;
    FIG. 3 is a front elevation view of the fill sensor of FIG. 1;
    FIG. 4 is a rear elevation view of the fill sensor of FIG. 1;
    FIG. 5 is a top plan view of the fill sensor of FIG. 1;
    FIG. 6 is a bottom plan view of the fill sensor of FIG. 1;
    FIG. 7 is a left side elevation view of the fill sensor of FIG. 1; and,
    FIG. 8 is a right side elevation view of the fill sensor of FIG. 1.
    The claimed ornamental design is shown embodied on an assembly that may be used, for example, as a multi-dimensional distance measuring device (e.g., two-dimensional, three-dimensional, four-dimensional), which may be implemented, by way of example and not limitation, to monitor fill level in one or more volumes of interest. In an illustrative example, the claimed ornamental design may be implemented on device operating as a photoelectric sensor. The broken lines shown in the drawings illustrate unclaimed portions of the claimed design and form no part of the claimed design. Where no boundary line is shown between solid lines, this disclosure encompasses at least a corresponding embodiment in which a boundary line connects the ends of solid lines to demarcate a boundary between a claimed portion and an unclaimed portion.

    Open-loop photodiode gain regulation

    公开(公告)号:US11609116B2

    公开(公告)日:2023-03-21

    申请号:US17446142

    申请日:2021-08-26

    Abstract: Apparatus and associated methods relate to an open-loop control circuit (OLCC) configured to determine a photodiode element (PDE) drive voltage as a function of a commanded photodiode gain level and a measured temperature signal. In an illustrative example the OLCC may receive a current temperature of an APD element. The OLCC may, for example, receive a commanded gain for the APD relative to a predetermined reference gain. The OLCC may, for example, retrieve a predetermined efficiency characteristic (PEC) of the APD based on the current temperature. If the temperature corresponds to a substantially non-linear portion of the PEC, the OLCC may, for example, determine the drive voltage as a function of the temperature and the commanded gain based on the PEC. Various embodiments may advantageously provide direct control of output gain of photodiodes over a wide dynamic range of temperature associated with the photodiode.

    TIME OF FLIGHT DETECTION SYSTEMS WITH EFFICIENT PHASE MEASUREMENT

    公开(公告)号:US20240134046A1

    公开(公告)日:2024-04-25

    申请号:US18546124

    申请日:2022-09-15

    Inventor: Ashley Wise

    CPC classification number: G01S17/36 G01S7/4915 G01S7/4918

    Abstract: Apparatus and associated methods relate to a select frequency phase measurement (SFPM) time of flight (TOF) system including an emitter and a receiver. The emitter may generate a modulated emitted signal by at least one frequency. The emitted signal may, for example, be a pulsed light signal. The receiver may generate a signal in response to receiving a reflection of the emitted signal off a target object. An ADC element may digitize a signal generated by the receiving element, and a reference signal generated by a monitored signal of the modulated emitted signal. A processing element may generate a phase signal using single frequency analysis of the digitized signals. A distance measurement signal may be generated as a function of the phase signal. Various embodiments may, for example, advantageously enable sub-millisecond sensor response times using commodity processing elements.

    Open-Loop Photodiode Gain Regulation

    公开(公告)号:US20220065693A1

    公开(公告)日:2022-03-03

    申请号:US17446142

    申请日:2021-08-26

    Abstract: Apparatus and associated methods relate to an open-loop control circuit (OLCC) configured to determine a photodiode element (PDE) drive voltage as a function of a commanded photodiode gain level and a measured temperature signal. In an illustrative example the OLCC may receive a current temperature of an APD element. The OLCC may, for example, receive a commanded gain for the APD relative to a predetermined reference gain. The OLCC may, for example, retrieve a predetermined efficiency characteristic (PEC) of the APD based on the current temperature. If the temperature corresponds to a substantially non-linear portion of the PEC, the OLCC may, for example, determine the drive voltage as a function of the temperature and the commanded gain based on the PEC. Various embodiments may advantageously provide direct control of output gain of photodiodes over a wide dynamic range of temperature associated with the photodiode.

    Open-loop laser power-regulation
    6.
    发明授权

    公开(公告)号:US09985414B1

    公开(公告)日:2018-05-29

    申请号:US15625949

    申请日:2017-06-16

    Inventor: Ashley Wise

    Abstract: Apparatus and associated methods relate to an open-loop control circuit (OLCC) configured to determine a lasing element drive current as a function of a commanded optical power signal and a measured temperature signal, where the absolute value of the second derivative of the optical output power with respect to laser drive current exceeds a predetermined threshold. In an illustrative example, the absolute value of the second derivative may exceed the predetermined threshold in a non-linear operating region of the laser element. The non-linear operating region may represent, for example, a characteristic output power vs. drive current curve of the lasing element. The OLCC may provide laser peak power control for arbitrary peak power, within linear and non-linear regions of laser efficiency. In some embodiments, the OLCC may substantially improve control over laser optical output power over a wide dynamic range of, for example, temperature associated with the lasing element.

    Frequency domain opposed-mode photoelectric sensor

    公开(公告)号:US11841477B2

    公开(公告)日:2023-12-12

    申请号:US17452723

    申请日:2021-10-28

    CPC classification number: G01V8/12 G08C23/04

    Abstract: Apparatus and associated methods relate to pairing a receiver with an emitter based on a presence of an amplitude of a spectral profile at at least one predetermined frequency. In an illustrative example, a receiver may receive, from the emitter, an emitted optical signal modulated by the at least one predetermined frequency. A receiver may, for example, generate a digital signal corresponding to the optical signal received. A controller may, for example, generate the spectral profile from the digital signal. The controller may, for example, apply a predetermined threshold to the spectral profile. The controller may, for example, generate an output signal based on the presence of the amplitude of the spectral profile above the first predetermined threshold at the at least one predetermined frequency. Various embodiments may advantageously discriminate a corresponding emitter to establish an optical source-to-detector-link, for example, in the presence of other emitters and/or optically noisy environments.

    Near range radar
    8.
    发明授权

    公开(公告)号:US11709244B2

    公开(公告)日:2023-07-25

    申请号:US17036255

    申请日:2020-09-29

    CPC classification number: G01S13/342 G01S13/347 G01S7/352

    Abstract: Apparatus and associated methods relate to enabling a radar system to use different sensing mechanisms to estimate a distance from a target based on different detection zones (e.g., far-field and near-field). In an illustrative example, a curve fitting method may be applied for near-field sensing, and a Fourier transform may be used for far-field sensing. A predetermined set of rules may be applied to select when to use the near-field sensing mechanism and when to use the far-field mechanism. The frequency of a target signal within a beat signal that has less than two sinusoidal cycles may be estimated with improved accuracy. Accordingly, the distance of a target that is within a predetermined distance range (e.g., two meters range for 24 GHz ISM band limitation) may be reliably estimated.

    FREQUENCY DOMAIN OPPOSED-MODE PHOTOELECTRIC SENSOR

    公开(公告)号:US20220137255A1

    公开(公告)日:2022-05-05

    申请号:US17452723

    申请日:2021-10-28

    Abstract: Apparatus and associated methods relate to pairing a receiver with an emitter based on a presence of an amplitude of a spectral profile at at least one predetermined frequency. In an illustrative example, a receiver may receive, from the emitter, an emitted optical signal modulated by the at least one predetermined frequency. A receiver may, for example, generate a digital signal corresponding to the optical signal received. A controller may, for example, generate the spectral profile from the digital signal. The controller may, for example, apply a predetermined threshold to the spectral profile. The controller may, for example, generate an output signal based on the presence of the amplitude of the spectral profile above the first predetermined threshold at the at least one predetermined frequency. Various embodiments may advantageously discriminate a corresponding emitter to establish an optical source-to-detector-link, for example, in the presence of other emitters and/or optically noisy environments.

    FIELD-SELECTABLE DYNAMIC GAIN CONTROL MODES OF OPTICAL SENSORS

    公开(公告)号:US20240385299A1

    公开(公告)日:2024-11-21

    申请号:US18692628

    申请日:2022-09-16

    Inventor: Ashley Wise

    Abstract: Apparatus and associated methods relate to a field selectable gain mode system. In an illustrative example, an APD-based sensor may, for example, have two or more predetermined gain modes. The gain modes may, for example, be activated in response to a selection signal(s) generated by a user. For example, the APD-based sensor may apply the user-selected gain mode by independently controlling a circuit gain, an emitter gain, and an APD gain. When the user selection signal is selected, for example, a controller may apply corresponding independent gain parameters to the circuit gain, the emitter gain, and the APD gain, such that a collective high dynamic range sensor system is provided. For example, the independent gain parameters may include a range of control voltages, a range of control current, and/or a range of gain input. Various embodiments may advantageously achieve increased accuracy across an extended operating range of gain values.

Patent Agency Ranking