Patents by Inventor Nikhil Bajaj

Nikhil Bajaj has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210365123
    Abstract: Aspects of the technology employ synchronized arrays of low-cost, readily available vibration actuators to emulate and outperform single actuator systems, bringing together sets of actuators to create desired control effects. This approach involves coherent phase switching and modulation of a linear actuator array. A pair of linear resonant actuators (LRAs) may be employed for improved haptic waveform synthesis performance. According to one feature, energy may stored in the mechanical inertia of the LRA via velocity and stiffness of the LRA via displacement and released through modulation of the relative phase of the LRAs. Phase switching and modulation techniques may be used to control more than two LRAs, and in other arrangements than a dual LRA, including, but not limited to architectures that have LRAs arranged in multiple directions in an array spanning, for example, the two dimensions of a plane, or three dimensions of physical space.
    Type: Application
    Filed: August 10, 2021
    Publication date: November 25, 2021
    Applicant: General Vibration Corporation
    Inventors: Nikhil Bajaj, George T.C. Chiu, John Houston, Rob Morris
  • Patent number: 11132062
    Abstract: Aspects of the technology employ synchronized arrays of low-cost, readily available vibration actuators to emulate and outperform single actuator systems, bringing together sets of actuators to create desired control effects. This approach involves coherent phase switching and modulation of a linear actuator array. A pair of linear resonant actuators (LRAs) may be employed for improved haptic waveform synthesis performance. According to one feature, energy may stored in the mechanical inertia of the LRA via velocity and stiffness of the LRA via displacement and released through modulation of the relative phase of the LRAs. Phase switching and modulation techniques may be used to control more than two LRAs, and in other arrangements than a dual LRA, including, but not limited to architectures that have LRAs arranged in multiple directions in a array spanning, for example, the two dimensions of a plane, or three dimensions of physical space.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: September 28, 2021
    Assignee: GENERAL VIBRATION CORPORATION
    Inventors: Nikhil Bajaj, George T.-C. Chiu, John Houston, Rob Morris
  • Patent number: 11061482
    Abstract: Force sensitive input device and methods are disclosed. A force sensitive input device may include a button, an analog sensor, and circuitry. The button may be movable along a first axis between first and second end positions and biased toward the first end position. The analog sensor may output an analog signal that is a function of a displacement of the button along the first axis from the first end position. The circuitry may generate both analog and digital input data in response to the analog signal. The analog input data may include a range of values that are monotonically related to the displacement of the button, and the digital input data may include first and second binary values.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: July 13, 2021
    Assignee: Aimpad, LLC
    Inventors: Lance William Madsen, Nikhil Bajaj
  • Patent number: 11060998
    Abstract: This present disclosure relates to sensors capable of sensing mass, stiffness, and chemical or biological substances. More specifically, this disclosure provides the design and implementation of a piecewise-linear resonator realized via diode- and integrated circuit-based feedback electronics and a quartz crystal resonator. The proposed system is fabricated and characterized, and the creation and selective placement of the bifurcation points of the overall electromechanical system is demonstrated by tuning the circuit gains. The demonstrated circuit operates around at least 1 MHz.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: July 13, 2021
    Assignee: Purdue Research Foundation
    Inventors: Jeffrey Frederick Rhoads, George Tsu-Chih Chiu, Nikhil Bajaj
  • Patent number: 10948489
    Abstract: A method of detecting a substance, wherein the method includes functionalizing a plurality of sensors, wherein the functionalizing the plurality of sensors comprises depositing a first material using a piezoelectrically actuated pipette system, wherein the first material includes a polymer, a receptor, and a solvent, wherein the solvent comprises dimethylformamide. The method further includes evaporating a solution of the first material wherein a residue after the evaporation comprises a functionalized chemical. Additionally, the method includes introducing a control material to a first set of sensors of the plurality of sensors using the piezoelectrically actuated pipette system. Further, the method includes introducing a test material to a second set of sensors of the plurality of sensors using the piezoelectrically actuated pipette system, wherein the test material comprises an analyte.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: March 16, 2021
    Assignee: Purdue Research Foundation
    Inventors: Jeffrey Frederick Rhoads, Eric A. Nauman, Mackenzie Tweardy, Michael Wadas, Allison Kelly Murray, George Tsu-Chih Chiu, Nikhil Bajaj
  • Publication number: 20210041387
    Abstract: The present disclosure relates to a novel composite film configured for CO2 sensing, and the method of making and using the novel composite film. The novel composite film comprises a carbon nanotube film and a CO2 absorbing layer deposited on the carbon nanotube film, wherein the CO2 absorbing layer comprises a mixture of a branched polyethylenimine, a polyethylene glycol, and poly[1-(4-vinylbenzyl)-3-methylimidazolium tetrafluoroborate] of formula I: wherein n ranges from 10-300.
    Type: Application
    Filed: August 6, 2020
    Publication date: February 11, 2021
    Applicant: Purdue Research Foundation
    Inventors: Jeffrey Frederick Rhoads, George Tsu-Chih Chiu, Bryan W Boudouris, Nikhil Bajaj, Allison Kelly Murray, Zachary A Siefker, Xikang Zhao
  • Publication number: 20200356173
    Abstract: Aspects of the technology employ synchronized arrays of low-cost, readily available vibration actuators to emulate and outperform single actuator systems, bringing together sets of actuators to create desired control effects. This approach involves coherent phase switching and modulation of a linear actuator array. A pair of linear resonant actuators (LRAs) may be employed for improved haptic waveform synthesis performance. According to one feature, energy may stored in the mechanical inertia of the LRA via velocity and stiffness of the LRA via displacement and released through modulation of the relative phase of the LRAs. Phase switching and modulation techniques may be used to control more than two LRAs, and in other arrangements than a dual LRA, including, but not limited to architectures that have LRAs arranged in multiple directions in a array spanning, for example, the two dimensions of a plane, or three dimensions of physical space.
    Type: Application
    Filed: November 7, 2018
    Publication date: November 12, 2020
    Inventors: Nikhil Bajaj, George T.-C. Chiu, John Houston, Rob Morris
  • Publication number: 20200218362
    Abstract: Force sensitive input device and methods are disclosed. A force sensitive input device may include a button, an analog sensor, and circuitry. The button may be movable along a first axis between first and second end positions and biased toward the first end position. The analog sensor may output an analog signal that is a function of a displacement of the button along the first axis from the first end position. The circuitry may generate both analog and digital input data in response to the analog signal. The analog input data may include a range of values that are monotonically related to the displacement of the button, and the digital input data may include first and second binary values.
    Type: Application
    Filed: January 2, 2020
    Publication date: July 9, 2020
    Inventors: Lance William Madsen, Nikhil Bajaj
  • Publication number: 20200064310
    Abstract: This present disclosure relates to sensors capable of sensing mass, stiffness, and chemical or biological substances. More specifically, this disclosure provides the design and implementation of a piecewise-linear resonator realized via diode- and integrated circuit-based feedback electronics and a quartz crystal resonator. The proposed system is fabricated and characterized, and the creation and selective placement of the bifurcation points of the overall electromechanical system is demonstrated by tuning the circuit gains. The demonstrated circuit operates around at least 1 MHz.
    Type: Application
    Filed: December 4, 2018
    Publication date: February 27, 2020
    Applicant: Purdue Research Foundation
    Inventors: Jeffrey Frederick Rhoads, George Tsu-Chih Chiu, Nikhil Bajaj
  • Publication number: 20190025296
    Abstract: A method of detecting a substance, wherein the method includes functionalizing a plurality of sensors, wherein the functionalizing the plurality of sensors comprises depositing a first material using a piezoelectrically actuated pipette system, wherein the first material includes a polymer, a receptor, and a solvent, wherein the solvent comprises dimethylformamide. The method further includes evaporating a solution of the first material wherein a residue after the evaporation comprises a functionalized chemical. Additionally, the method includes introducing a control material to a first set of sensors of the plurality of sensors using the piezoelectrically actuated pipette system. Further, the method includes introducing a test material to a second set of sensors of the plurality of sensors using the piezoelectrically actuated pipette system, wherein the test material comprises an analyte.
    Type: Application
    Filed: July 19, 2018
    Publication date: January 24, 2019
    Applicant: Purdue Research Foundation
    Inventors: Jeffrey Frederick Rhoads, Eric A. Nauman, Mackenzie Tweardy, Michael Wadas, Allison Kelly Murray, George Tsu-Chih Chiu, Nikhil Bajaj
  • Patent number: 10072969
    Abstract: A device and method for sensing including a sensor having a functional surface layer located to interact with a material to be sensed, the sensor having an output that produces a signal responsive one or more of inertia, stiffness, acceleration, pressure, radiation, chemical compounds, and biological compounds; and further including electronics including: an input coupled to the sensor to receive a first signal therefrom; and a non-linearity provider that applies one or more non-linear operations to the input signal to generate a non-linear second signal.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: September 11, 2018
    Assignee: Purdue Research Foundation
    Inventors: Jeffrey Frederick Rhoads, George Tsu-Chih Chiu, Nikhil Bajaj, Andrew Burke Sabater
  • Publication number: 20180180466
    Abstract: A device and method for sensing including a sensor having a functional surface layer located to interact with a material to be sensed, the sensor having an output that produces a signal responsive one or more of inertia, stiffness, acceleration, pressure, radiation, chemical compounds, and biological compounds; and further including electronics including: an input coupled to the sensor to receive a first signal therefrom; and a non-linearity provider that applies one or more non-linear operations to the input signal to generate a non-linear second signal.
    Type: Application
    Filed: February 7, 2018
    Publication date: June 28, 2018
    Applicant: Purdue Research Foundation
    Inventors: Jeffrey Frederick Rhoads, George Tsu-Chih Chiu, Nikhil Bajaj, Andrew Burke Sabater
  • Patent number: 9927287
    Abstract: A device and method for sensing including a sensor having a functional surface layer located to interact with a material to be sensed, the sensor having an output that produces a signal responsive one or more of inertia, stiffness, acceleration, pressure, radiation, chemical compounds, and biological compounds; and further including electronics including: an input coupled to the sensor to receive a first signal therefrom; and a non-linearity provider that applies one or more non-linear operations to the input signal to generate a non-linear second signal.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: March 27, 2018
    Assignee: Purdue Research Foundation
    Inventors: Jeffrey Frederick Rhoads, George Tsu-Chih Chiu, Nikhil Bajaj, Andrew Burke Sabater
  • Publication number: 20160290855
    Abstract: A device and method for sensing including a sensor having a functional surface layer located to interact with a material to be sensed, the sensor having an output that produces a signal responsive one or more of inertia, stiffness, acceleration, pressure, radiation, chemical compounds, and biological compounds; and further including electronics including: an input coupled to the sensor to receive a first signal therefrom; and a non-linearity provider that applies one or more non-linear operations to the input signal to generate a non-linear second signal.
    Type: Application
    Filed: December 17, 2015
    Publication date: October 6, 2016
    Inventors: Jeffrey Frederick Rhoads, George Tsu-Chih Chiu, Nikhil Bajaj, Andrew Burke Sabater
  • Publication number: 20160044195
    Abstract: An operational imaging device and method for sensing a media type in a predetermined media set using a predetermined set of media type determining equations solved using measured values for a set of N variables measured by an operational sensor set in the operational imaging device. The solution of the equation set determines a media type. After a media type is determined, one or more operational parameters of the imaging device is selected for processing of a sheet of the determined media type. The equation set is generated by a training system using a classifier training engine. A plurality of training data sets containing measured variable values for each media type is collected under various conditions by a training sensor set that measures the set of N variables. After generation, the media type determining equation set is stored in memory of the operational imaging device.
    Type: Application
    Filed: June 4, 2014
    Publication date: February 11, 2016
    Inventors: Niko Jay Murrell, Julie Ann Gordon Whitney, Ryan Thomas Bradley, Nikhil Bajaj
  • Patent number: 8922399
    Abstract: Illustrative embodiments of force sensitive input devices and methods are disclosed. In at least one embodiment, an input device may comprise a first input key configured to output a first analog signal as a function of force applied to the first input key, a second input key configured to output a second analog signal as a function of force applied to the second input key, a third input key configured to output a third analog signal as a function of force applied to the third input key, a fourth input key configured to output a fourth analog signal as a function of force applied to the fourth input key, and a controller configured to output movement data including both direction and magnitude in response to the first, second, third, and fourth analog signals, where the movement data is formatted for presentation to a driver of a computing device.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: December 30, 2014
    Assignee: Aimpad, LLC
    Inventors: Nikhil Bajaj, Lance William Madsen
  • Publication number: 20140267053
    Abstract: Illustrative embodiments of force sensitive input devices and methods are disclosed. In at least one embodiment, an input device may comprise a first input key configured to output a first analog signal as a function of force applied to the first input key, a second input key configured to output a second analog signal as a function of force applied to the second input key, a third input key configured to output a third analog signal as a function of force applied to the third input key, a fourth input key configured to output a fourth analog signal as a function of force applied to the fourth input key, and a controller configured to output movement data including both direction and magnitude in response to the first, second, third, and fourth analog signals, where the movement data is formatted for presentation to a driver of a computing device.
    Type: Application
    Filed: May 2, 2014
    Publication date: September 18, 2014
    Applicant: Aimpad, LLC
    Inventors: Nikhil Bajaj, Lance William Madsen
  • Patent number: 8717202
    Abstract: Illustrative embodiments of force sensitive input devices and methods are disclosed. In at least one embodiment, a force sensitive input device may comprise a button movable along a first axis between a first end position and a second end position, the button including a reflective surface, a resilient component biasing the button toward the first end position, and a reflectance sensor configured to emit light that impinges upon the reflective surface and to measure an amount of the light that is reflected from the reflective surface, wherein the light travels generally parallel to the first axis.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 6, 2014
    Assignee: Aimpad, LLC
    Inventors: Nikhil Bajaj, Lance William Madsen