Patents by Inventor Saravanan Sadasivan

Saravanan Sadasivan 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).

  • Patent number: 8974117
    Abstract: In one example, a pulse width modulation output temperature sensor device includes a linearization module, an analog-to-digital converter module operatively connected to the linearization module, and a digital magnitude comparator module operatively connected to the analog-to-digital converter module. A binary counter module is also operatively connected to the digital magnitude comparator module. The pulse width modulation output temperature sensor device thereby generates a digital pulse width modulation output based on a temperature sensor reading.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: March 10, 2015
    Assignee: Honeywell International Inc.
    Inventors: Abhik Giri, Saravanan Sadasivan, Manjunath Sreenivasaiah
  • Patent number: 8596119
    Abstract: Methods and apparatus are provided for measuring the liquid level within a reservoir based on the buoyancy force that the liquid imparts to a float member. a float member is at least partially submerged into a liquid in a reservoir. The float member is configured, upon being at least partially submerged into the liquid to a depth, to have a buoyancy force exerted thereon by the liquid that is proportional to the depth. The buoyancy force is transferred from the float member to a sensor, via a force transfer mechanism that is movable relative to the float member and the sensor.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: December 3, 2013
    Assignee: Honeywell International Inc.
    Inventors: Basavaraja M. Teli, Saravanan Sadasivan
  • Publication number: 20130266041
    Abstract: In one example, a pulse width modulation output temperature sensor device includes a linearization module, an analog-to-digital converter module operatively connected to the linearization module, and a digital magnitude comparator module operatively connected to the analog-to-digital converter module. A binary counter module is also operatively connected to the digital magnitude comparator module. The pulse width modulation output temperature sensor device thereby generates a digital pulse width modulation output based on a temperature sensor reading.
    Type: Application
    Filed: April 4, 2012
    Publication date: October 10, 2013
    Applicant: Honeywell International Inc.
    Inventors: Abhik Giri, Saravanan Sadasivan, Manjunath Sreenivasaiah
  • Publication number: 20120204636
    Abstract: Methods and apparatus are provided for measuring the liquid level within a reservoir based on the buoyancy force that the liquid imparts to a float member. a float member is at least partially submerged into a liquid in a reservoir. The float member is configured, upon being at least partially submerged into the liquid to a depth, to have a buoyancy force exerted thereon by the liquid that is proportional to the depth. The buoyancy force is transferred from the float member to a sensor, via a force transfer mechanism that is movable relative to the float member and the sensor.
    Type: Application
    Filed: February 10, 2011
    Publication date: August 16, 2012
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Basavaraja M. Teli, Saravanan Sadasivan
  • Publication number: 20090288484
    Abstract: An integrated mechanical combi sensor apparatus and method for measuring humidity, pressure and temperature. A pressure sensor and an ASIC can be mounted in a first compartment, and a temperature sensor mounted in a second compartment of a housing. Similarly, a humidity sensor can be mounted in a third compartment such that the pressure sensor, temperature sensor, and humidity sensor are isolated from each other. The sensor element associated with the sensors and the ASIC can be connected to a lead frame terminal by wire bonding for electrical connection. A pressure cover and a humidity cover can be utilized for covering the pressure sensor and the humidity sensor. The humidity sensor can include a hydrophobic filter for preventing moisture-saturated air from reaching the sensing element in order to provide accurate sensor measurements thereof.
    Type: Application
    Filed: May 21, 2008
    Publication date: November 26, 2009
    Inventors: Thirumani Selvan, Saravanan Sadasivan
  • Patent number: 7515019
    Abstract: An apparatus and method for measuring the position of a member. The apparatus has a sonic waveguide, a generator for generating an interrogation sonic wave at a first position in the sonic wave guide, and a transducer for converting the interrogation sonic wave, at a second position in the sonic wave guide, to an interrogation signal. A timer can be enabled in response to the generator generating the interrogation sonic wave and stopped in response to the transducer converting the interrogation sonic wave so as to determine the propagation time delay of the interrogation sonic wave and the distance between the first and second positions. When the transducer is attached to a member, the position of the member can be determined from this distance. The apparatus can include a transmitter for transmitting the interrogation signal. The generator can be configured to generate an excitation sonic wave which is converted by the transducer to a power signal for powering the transmitter.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: April 7, 2009
    Assignee: Honeywell International Inc.
    Inventors: Raghavendra Muniraju, Saravanan Sadasivan, Raviprakash Thotadakumbri
  • Patent number: 7430918
    Abstract: A MEMS based pressure sensor for flow measurements includes a pressure sense die located between a media seal and a conductive seal. Such a system includes a pressure sense die located between a media seal and a conductive seal. A sensing diaphragm is generally associated with the pressure sense die, wherein the sensing diaphragm deflects when a pressure is applied thereto. An impedance circuit is generally embedded with one or more resistors on the sensing diaphragm to which the pressure to be detected is applied. An ASIC is generally associated with the impedance circuit and the sense die, wherein the ASIC is placed on a lead frame for signal conditioning in order to detect a change in the pressure.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: October 7, 2008
    Assignee: Honeywell International Inc.
    Inventors: Thirumani A. Selvan, Saravanan Sadasivan
  • Publication number: 20080127741
    Abstract: A MEMS based pressure sensor for flow measurements includes a pressure sense die located between a media seal and a conductive seal. Such a system includes a pressure sense die located between a media seal and a conductive seal. A sensing diaphragm is generally associated with the pressure sense die, wherein the sensing diaphragm deflects when a pressure is applied thereto. An impedance circuit is generally embedded with one or more resistors on the sensing diaphragm to which the pressure to be detected is applied. An ASIC is generally associated with the impedance circuit and the sense die, wherein the ASIC is placed on a lead frame for signal conditioning in order to detect a change in the pressure.
    Type: Application
    Filed: December 4, 2006
    Publication date: June 5, 2008
    Inventors: Thirumani A. Selvan, Saravanan Sadasivan
  • Patent number: 7365535
    Abstract: A closed loop magnetic sensor system for measuring an input magnetic field from a magnetic field source has a compensation circuit, which can be for example a printed wire board, and a magnetic sensor, such as a Magnetoresistive (MR) sensor, for measuring an input magnetic field. Preferably, the magnetic sensor is magnetically coupled to the compensation circuit by arranging the magnetic sensor in an air gap provided in the compensation circuit. The compensation circuit has a compensating conductor, arranged on or in a dielectric medium, which can be configured as a plurality of nested coils. Electrical control circuitry, electrically, coupled to the magnetic sensor and compensating conductor, is adapted and arranged to drive a feedback current through the compensating conductor according to the output of the magnetic sensor such that the input magnetic field is substantially compensated at the magnetic sensor. The magnetic system can serve as current sensor for sensing current through a primary conductor.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: April 29, 2008
    Assignee: Honeywell International Inc.
    Inventors: Raghavendra Muniraju, Gangi Rajula Reddy, Saravanan Sadasivan, Basavaraja M. Teli, Sudheer Pulikkara Veedu
  • Publication number: 20070139137
    Abstract: An apparatus and method for measuring the position of a member. The apparatus has a sonic waveguide, a generator for generating an interrogation sonic wave at a first position in the sonic wave guide, and a transducer for converting the interrogation sonic wave, at a second position in the sonic wave guide, to an interrogation signal. A timer can be enabled in response to the generator generating the interrogation sonic wave and stopped in response to the transducer converting the interrogation sonic wave so as to determine the propagation time delay of the interrogation sonic wave and the distance between the first and second positions. When the transducer is attached to a member, the position of the member can be determined from this distance. The apparatus can include a transmitter for transmitting the interrogation signal. The generator can be configured to generate an excitation sonic wave which is converted by the transducer to a power signal for powering the transmitter.
    Type: Application
    Filed: December 20, 2005
    Publication date: June 21, 2007
    Inventors: Raghavendra Muniraju, Saravanan Sadasivan, Raviprakash Thotadakumbri
  • Publication number: 20070114992
    Abstract: A closed loop magnetic sensor system for measuring an input magnetic field from a magnetic field source has a compensation circuit, which can be for example a printed wire board, and a magnetic sensor, such as a Magnetoresistive (MR) sensor, for measuring an input magnetic field. Preferably, the magnetic sensor is magnetically coupled to the compensation circuit by arranging the magnetic sensor in an air gap provided in the compensation circuit. The compensation circuit has a compensating conductor, arranged on or in a dielectric medium, which can be configured as a plurality of nested coils. Electrical control circuitry, electrically, coupled to the magnetic sensor and compensating conductor, is adapted and arranged to drive a feedback current through the compensating conductor according to the output of the magnetic sensor such that the input magnetic field is substantially compensated at the magnetic sensor. The magnetic system can serve as current sensor for sensing current through a primary conductor.
    Type: Application
    Filed: November 23, 2005
    Publication date: May 24, 2007
    Inventors: Raghavendra Muniraju, Gangi Reddy, Saravanan Sadasivan, Basavaraja Teli, Sudheer Veedu
  • Patent number: 7162927
    Abstract: The invention provides pressure sensors for use in wet environments. A pressure sensor package according to the invention has a housing having a pair of cavities separated by a wall member. Sequentially contained within one cavity is a conductive elastomeric seal pad, a pressure sensor and an elastomeric media seal. A pressure cap is attached to the housing such that the pressure cap and the housing together form a hermetic seal. The pressure cap has a port for admitting a gas under pressure into the first cavity. A signal amplifier is positioned within the second cavity and a cover encloses the signal amplifier within the second cavity. An electrical connector through the wall member forms an electrical connection between the pressure sensor and the signal amplifier. A lead frame extends through the housing and forms electrical connections with the pressure sensor and the signal amplifier.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: January 16, 2007
    Assignee: Honeywell International Inc.
    Inventors: Thirumani A. Selvan, Gururaj U. Shenoy, Saravanan Sadasivan, Raghavendra Muniraju