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    Compression ignition engine control
    1.
    发明授权
    Compression ignition engine control 有权

    公开(公告)号：US12215642B2

    公开(公告)日：2025-02-04

    申请号：US18465387

    申请日：2023-09-12

    Applicant: Regents of the University of Minnesota

    Inventor： Rajesh Rajamani ,  Woongsun Jeon

    IPC: F02D35/02 ,  F02D41/06

    Abstract: A method of estimating in-cylinder pressure includes receiving a vibration signal from a vibration sensor mounted proximate a compression ignition (CI) engine, receiving angular position information for the CI engine, and determining in-cylinder pressure based on the angular position information and on a combustion component of the vibration signal.

    SUPERCAPACITOR-BASED SENSORS WITH FLEXIBLE ELECTROLYTES
    3.
    发明申请
    SUPERCAPACITOR-BASED SENSORS WITH FLEXIBLE ELECTROLYTES 审中-公开

    公开(公告)号：US20190078946A1

    公开(公告)日：2019-03-14

    申请号：US16127827

    申请日：2018-09-11

    Applicant: Regents of the University of Minnesota

    Inventor： Ye Zhang ,  Rajesh Rajamani ,  Serdar A. Sezen

    IPC: G01L1/14 ,  H01G11/26 ,  H01G11/56 ,  H01G11/84 ,  G01L5/16

    Abstract: Supercapacitor-based sensors having flexible solid-state electrolytic elements are described. The deformation of the electrolytic element in response to an applied force or strain changes the area of capacitive layers defined by contacting surfaces of the electrolytic element and one or more electrodes of the sensor. The resulting change in capacitance of the capacitive double layers is indicative of the magnitude of the applied force or of the strain. The flexible solid-state electrolytic element may include cellulosic material distributed in a cured ionic polymeric matrix. Techniques for forming the flexible solid-state electrolytic element include wetting a cellulosic material with a photocurable composition comprising an ionic liquid, a prepolymer composition, and a photoinitiator, and photocuring the photocurable composition for a predetermined curing period by exposing the wetted cellulosic material to a predetermined curing wavelength.

    POSITION SENSING SYSTEM WITH AN ELECTROMAGNET
    4.
    发明申请
    POSITION SENSING SYSTEM WITH AN ELECTROMAGNET 审中-公开

    公开(公告)号：US20190011289A1

    公开(公告)日：2019-01-10

    申请号：US16105660

    申请日：2018-08-20

    Applicant: Regents of the University of Minnesota

    Inventor： Heng Wang ,  Rajesh Rajamani ,  Ryan Madson

    IPC: G01D5/20

    Abstract: A position sensing system for measuring a position of a linearly moving object includes a high magnetic permeability material positioned on the moving object, an electromagnet configured to generate an alternating magnetic field, and at least one magnetic sensor configured to measure an intensity of a first magnetic field that is based on the alternating magnetic field. A controller is configured to estimate a linear position of the moving object based on the measured intensity of the first magnetic field.

    End Effector Position Estimation
    6.
    发明申请
    End Effector Position Estimation 有权

    公开(公告)号：US20220195689A1

    公开(公告)日：2022-06-23

    申请号：US17554087

    申请日：2021-12-17

    Applicant: Regents of the University of Minnesota

    Inventor： Rajesh Rajamani ,  Gregory W. Johnson

    IPC: E02F3/43 ,  E02F9/22

    Abstract: One example is directed to an end effector position estimation system for an off-road vehicle, which includes at least one inertial measurement unit (IMU) configured to be positioned on at least one of actuators and links of the vehicle that together move the end effector of the vehicle, and configured to generate measurement signals. The position estimation system includes at least one other IMU configured to be positioned on a base of the vehicle, and configured to generate other measurement signals. The position estimation system includes an estimation unit to estimate a position of the end effector of the vehicle based at least in part on the measurement signals and the other measurement signals, wherein the estimation unit is configured to perform an estimation method that removes an influence of terrain-induced vibrations and terrain slope in the measurement signals based on the other measurement signals.

    POSITION SENSING SYSTEM
    7.
    发明申请
    POSITION SENSING SYSTEM 审中-公开

    公开(公告)号：US20190204116A1

    公开(公告)日：2019-07-04

    申请号：US16293060

    申请日：2019-03-05

    Applicant: Regents of the University of Minnesota

    Inventor： Rajesh Rajamani ,  Saber Taghvaeeyan

    IPC: G01D5/14

    CPC classification number: G01D5/14 ,  G01D5/145

    Abstract: A position sensing system for measuring a position of a moving object includes a first magnetic sensor configured to measure an intensity of a magnetic field produced by the moving object. The system includes a controller configured to estimate a position of the moving object based on a nonlinear model of the magnetic field produced by the moving object as a function of position around the moving object, and based on the measured intensity of the magnetic field produced by the moving object.

    INSTRUMENTED WEARABLE DEVICE FOR MEASUREMENT OF PHYSIOLOGICAL PARAMETERS
    9.
    发明申请
    INSTRUMENTED WEARABLE DEVICE FOR MEASUREMENT OF PHYSIOLOGICAL PARAMETERS 审中-公开
    用于测量生理参数的仪器设备

    公开(公告)号：US20170049394A1

    公开(公告)日：2017-02-23

    申请号：US15240731

    申请日：2016-08-18

    Applicant: Regents of the University of Minnesota ,  Mayo Foundation for Medical Education and Research

    Inventor： Song Zhang ,  Rajesh Rajamani ,  Bruce Johnson

    IPC: A61B5/00 ,  A61B5/0205 ,  A61B5/107

    CPC classification number: A61B5/6807 ,  A61B5/0053 ,  A61B5/0205 ,  A61B5/02405 ,  A61B5/1073 ,  A61B5/4878 ,  A61B5/746 ,  A61B2090/064 ,  A61B2562/0223 ,  A61B2562/0247 ,  A61B2562/164 ,  G06F19/00

    Abstract: This disclosure describes devices, system, and a method for the prediction and prevention of acute decompensated heart failure or other patient conditions involving fluid accumulation in legs or hands. In one example, a wearable device contains a drift-free leg-size sensor and a tissue-elasticity sensor. Both sensors may be relatively inexpensive and developed using innovative new sensing ideas. Preliminary tests with the sensor prototypes show promising results: the leg-size sensor is capable of measuring 1 mm changes in leg diameter and the tissue-elasticity sensor can detect 0.15 MPa differences in elasticity. In another example, a wearable system includes sensors for measuring a variety of physiological parameters, a processing module, and a communication module. A low-profile instrumented sock, e.g., a wearable device, with multiple sensors can provide an indication of heart failure status for a patient.

    Abstract translation: 本公开描述了用于预测和预防急性失代偿性心力衰竭或涉及腿或手中的液体积聚的其他患者病况的装置，系统和方法。 在一个示例中，可穿戴设备包含无漂移的腿部尺寸传感器和组织弹性传感器。 这两种传感器可能相对便宜并且使用创新的新感测方案开发。 使用传感器原型的初步测试显示出有希望的结果：腿部尺寸传感器能够测量腿部直径的1mm变化，组织弹性传感器可以检测到0.15 MPa的弹性差异。 在另一示例中，可穿戴系统包括用于测量各种生理参数的传感器，处理模块和通信模块。 具有多个传感器的低调仪器化袜子，例如可穿戴设备可以提供患者的心力衰竭状态的指示。

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