MEMS-based conformal air speed sensor
    31.
    发明授权
    MEMS-based conformal air speed sensor 有权
    基于MEMS的保形空气速度传感器

    公开(公告)号:US09322685B2

    公开(公告)日:2016-04-26

    申请号:US14318955

    申请日:2014-06-30

    Inventor: Gary A. Ray

    CPC classification number: G01F1/383 G01F1/46 G01P5/14

    Abstract: Systems and methods for measuring air speed which solve the problem of icing or blockage by creating an exterior surface on an aircraft that channels air and measures the pressure difference of the pressure through the airflow and the static pressure. This exterior surface cannot be blocked easily because air is always flowing when the aircraft is in motion, any external matter that could be on the exterior surface is readily visible, and the exterior surface can be heated to prevent icing. In addition, the exterior surface is made of a flexible material that is able to conform closely to the exterior shape of the aircraft. The preferred embodiments comprise microelectromechanical system pressure sensors placed under the air channels for measuring the pressure difference in each channel and an air speed processor for transforming the pressure differences into an air speed estimate.

    Abstract translation: 用于测量空气速度的系统和方法,其通过在飞行器上产生通道空气的外表面并测量通过气流和静压力的压力压力差来解决结冰或堵塞的问题。 这种外表面不容易被阻挡,因为当飞机运动时空气总是流动,任何可能在外表面上的外部物质都容易可见,并且可以加热外表面以防止结冰。 此外,外表面由柔性材料制成,该柔性材料能够紧密地与飞机的外形吻合。 优选实施例包括放置在空气通道下方的微机电系统压力传感器,用于测量每个通道中的压力差,以及空气速度处理器,用于将压力差转换成空气速度估计值。

    Systems and methods for non-contact biometric sensing
    32.
    发明授权
    Systems and methods for non-contact biometric sensing 有权
    非接触式生物识别系统和方法

    公开(公告)号:US09167972B2

    公开(公告)日:2015-10-27

    申请号:US13914743

    申请日:2013-06-11

    Abstract: A non-contact biometric sensing device is described. The device includes a processing device, a user interface communicatively coupled to the processing device, a display communicatively coupled to the processing device, a laser doppler vibrometer sensor communicatively coupled to the processing device, and an infrared camera communicatively coupled to the processing device. The processing device is programmed to utilize mechanical motion data received from the laser doppler vibrometer sensor and thermal distributions data from the infrared camera to calculate biometric data, when signals originating from the laser doppler vibrometer sensor and the infrared camera are reflected back towards the device from a target.

    Abstract translation: 描述非接触式生物测定传感装置。 该设备包括处理设备,通信地耦合到处理设备的用户界面,通信地耦合到处理设备的显示器,通信地耦合到处理设备的激光多普勒测振传感器以及通信地耦合到处理设备的红外照相机。 当来自激光多普勒测振传感器和红外摄像机的信号被反射回设备时,处理设备被编程为利用从激光多普勒测振传感器接收的机械运动数据和来自红外摄像机的热分布数据来计算生物测定数据 一个目标。

    Programmable RF Front End for Wideband ADC-Based Receiver

    公开(公告)号:US20220239322A1

    公开(公告)日:2022-07-28

    申请号:US17568801

    申请日:2022-01-05

    Abstract: A receiver includes an antenna block configured to transduce impinging electromagnetic signals into electrical signals; a signal conditioning block configured to condition electrical signals received from the antenna block; and a down-converter block configured to down-convert conditioned electrical signals received from the signal conditioning block. The down-converter block comprises a plurality of signal channels. The receiver further includes a plurality of analog-to-digital converters (ADCs) respectively connected to the signal channels of the down-converter block; and a field-programmable gate array (FPGA). The FPGA is configured to program the down-converter block by selecting a set of mixer frequencies and a set of bandwidths designed to remove interference signals in each signal channel. The selections are calculated to mitigate reductions in dynamic range in the ADCs due to interference. The FPGA is further configured to process digital signals received from the ADCs after the down-converter block has removed the interference signals.

    VARIABLE FREQUENCY COMB GENERATION
    34.
    发明申请

    公开(公告)号:US20220216858A1

    公开(公告)日:2022-07-07

    申请号:US17452321

    申请日:2021-10-26

    Inventor: Gary A. Ray

    Abstract: A method and apparatus for generating a frequency comb. A sine wave comprising samples is generated at a selected sampling rate and a selected increment corresponding to a number of samples for a period of the sine wave using a lookup table or a CORDIC algorithm. The sine wave is processed by a universal differential equation to generate the frequency comb. Characteristics of the frequency comb generated from the sine wave are controlled by changing the sampling rate and the increment.

    System and Method for Direct Signal Down-Conversion and Decimation

    公开(公告)号:US20220123763A1

    公开(公告)日:2022-04-21

    申请号:US17459655

    申请日:2021-08-27

    Inventor: Gary A. Ray

    Abstract: Systems and methods for direct signal down-conversion and decimation in a digital receiver. The digital receiver produces a decimated passband version of the signal without the problems associated with use of digital mixers. The digital receiver includes a passband-to-passband decimator/down-converter that implements an algorithm which takes the signal band (frequency and bandwidth or lower and upper frequencies) where a signal is present and produces a decimation rate and phase for use by a low-pass mixer-free down-conversion. The digital receiver technology may be efficiently implemented on a digital signal processor or field-programmable gate array.

    System and Method Using Adjunct Signals to Increase Wideband Receiver Performance

    公开(公告)号:US20220103403A1

    公开(公告)日:2022-03-31

    申请号:US17397682

    申请日:2021-08-09

    Inventor: Gary A. Ray

    Abstract: Systems and methods which use adjunct signals from a remote highly stable clock to enhance performance of a digital wideband receiver equipped with a less stable local clock system. The digital wideband receiver includes an analog-to-digital converter (ADC) and an adjunct receiver system connected to the output of the ADC. The adjunct receiver system includes matched filters and circuitry configured to generate an interpolation coefficient vector based on the matched filter outputs. The adjunct receiver system further includes an interpolating filter which is configured to remove jitter from the digitized samples output by the ADC using the interpolation coefficient vector.

    Signal Frequency and Bandwidth Estimation Using a Learned Filter Pair Response

    公开(公告)号:US20210336644A1

    公开(公告)日:2021-10-28

    申请号:US16858960

    申请日:2020-04-27

    Inventor: Gary A. Ray

    Abstract: Systems and methods for estimating frequency and bandwidth of unknown signals using learned features of a filter pair for the purpose of detecting, separating and tracking these signals in an electronic receiver. The techniques could be part of a signal cueing system that initiates signal detection, separation and tracking or a signal separation and tracking system which is initialized by the cueing system and adaptively updates frequency and bandwidth estimates so as to continuously separate and track signals after initial detection. The methodology is to train the filter responses using machine learning by creating a grid of training data based on signal examples that cover a span of frequencies and bandwidths. The system estimates frequency and bandwidth in real time, inputs those estimates into interpolating lookup tables to retrieve filter coefficients, and provides those filter coefficients to a tunable tracking filter.

    System and method for detecting pulses using fused signal power/phase modulation detection

    公开(公告)号:US10725151B1

    公开(公告)日:2020-07-28

    申请号:US16418025

    申请日:2019-05-21

    Inventor: Gary A. Ray

    Abstract: A signal power detection method is fused with a double-difference phase modulation detection method to provide a higher-performance method of pulse detection for any digital receiver. The first pulse detection technique uses a signal power threshold. When the square of the magnitude of a pulse crosses the signal power threshold, the beginning of a pulse is declared and pulse processing starts. The second pulse detection technique is model based and uses a windowed detector that crosses a phase difference threshold when the pulse has consistent second-order (in general d-th order) difference phase values within the window. The first technique has low latency and is independent of pulse width, but only operates well at SNR values greater than 15 dB. The second technique has higher latency and requires a minimum pulse width, but operates at lower (approximately 0 dB) SNR values.

    Frameless random-access image sensing

    公开(公告)号:US10540733B2

    公开(公告)日:2020-01-21

    申请号:US15814803

    申请日:2017-11-16

    Abstract: A method and apparatus for frameless random-access image sensing. Instructions identifying a pixel detector in an array of pixel detectors and integration instructions for the pixel detector may be received by an image detector controller. Integration by the pixel detector may be controlled as defined by the integration instructions to generate pixel data by the pixel detector. The pixel data may be read from the pixel detector.

    Universal nonlinear variable delay filter

    公开(公告)号:US10432249B1

    公开(公告)日:2019-10-01

    申请号:US16008597

    申请日:2018-06-14

    Inventor: Gary A. Ray

    Abstract: A universal nonlinear variable delay filter includes a first mixer configured to convert an input signal to an up-converted signal including a frequency corresponding to a selected time delay. The input signal includes an original frequency. The variable delay filter also includes a nonlinear filter that filters the up-converted signal and generates a delayed signal that is delayed by the selected time delay. The variable delay filter further includes a second mixer configured to convert the delayed signal to a down-converted signal including a frequency substantially equal to the original frequency.

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