Patents Assigned to Measurement Specialties Inc.
  • Publication number: 20200003649
    Abstract: A pressure sensing device includes a support structure, an isolated diaphragm, a working oil, and a MEMS die sensing element. The support structure defines a portion of a sealed cavity. The isolated diaphragm is mounted to the support structure. The isolated diaphragm has in inner side that defines an end of the sealed cavity and an outer side opposite the inner side. The working oil is contained within the sealed cavity. The MEMS die sensing element is enclosed within the support structure. The MEMS die sensing element is exposed to the working oil within the sealed cavity. A pressure exerted on the outer side of the isolated diaphragm by a fluid medium is transferred via the working oil to the MEMS die sensing element to measure the pressure of the fluid medium. The working oil has a low vapor pressure and a low volatility content.
    Type: Application
    Filed: June 28, 2019
    Publication date: January 2, 2020
    Applicant: Measurement Specialties, Inc.
    Inventors: Natasha V. Kachenko, Jonathan Tran
  • Patent number: 10495538
    Abstract: A sensor assembly comprising a housing defining a cavity, and a pressure sensor package arranged within the cavity. The pressure sensor package includes a substrate having an aperture defined therethrough, a semiconductor die including a sensing diaphragm attached to the substrate such that the diaphragm is exposed via the aperture, and at least one electrically conductive element in electrical communication with the semiconductor die arranged on the substrate. A sealing element, such as an elastomeric o-ring, provides a seal between the housing and the substrate. A connector is secured to the housing via a crimped connection for establishing electrical connections between the pressure sensor package and an external system.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: December 3, 2019
    Assignee: Measurement Specialties, Inc
    Inventor: David E. Wagner
  • Patent number: 10483453
    Abstract: A method of forming an ultrasonic transducer comprises coupling a front polymer layer of uniform thickness to a piezoelectric element. A front metal layer is coupled to the polymer layer on a side of the front polymer layer opposite the piezoelectric element for transmitting acoustic energy between the front polymer layer and a propagation medium. The front polymer layer and the front metal layer define a front acoustic impedance converter, wherein the front polymer layer completely isolates the piezoelectric element from the front metal layer.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: November 19, 2019
    Assignee: Measurement Specialties, Inc.
    Inventors: Minoru Toda, Mitchell L. Thompson
  • Patent number: 10466125
    Abstract: A differential pressure sensor includes a first sensor housing member having a first fluid inlet port for receiving a first fluid at a first pressure and a second sensor housing member having a second fluid inlet port for receiving a second fluid at a second pressure. A pressure-sensing subassembly includes a semiconductor pressure-sensing die having a sensitive diaphragm for sensing pressure. The pressure-sensing subassembly is configured for insertion into the differential pressure sensor such that once inserted the first fluid inlet port is in fluid communication with a first surface of the sensitive diaphragm and the second fluid inlet port is in fluid communication with a second surface of the sensitive diaphragm.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: November 5, 2019
    Assignee: Measurement Specialties Inc.
    Inventor: David E. Wagner
  • Patent number: 10371591
    Abstract: A differential pressure sensor includes one or more semiconductor dies which are thinned at portions of the die to create a chamber defining a sensitive diaphragm, having piezoresistive elements defined at a surface of the diaphragm. A first diaphragm is in fluid communication with a first fluid on an upper surface of the first diaphragm and is in fluid communication with a second fluid on a lower surface of the first diaphragm. A second diaphragm is in fluid communication with ambient pressure at an upper and a lower surface of the second diaphragm. The piezoresistive elements corresponding to the second diaphragm are electrically connected to the piezoresistive elements of the first diaphragm so as to compensate the output of the second diaphragm with respect to the output of the first diaphragm.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: August 6, 2019
    Assignee: Measurement Specialties, Inc.
    Inventors: David E. Wagner, Natasha V. Kachenko, James H. Hoffman
  • Patent number: 10326072
    Abstract: An ultrasonic transducer comprising a piezoelectric element, an acoustic matching layer arranged on a surface of the piezoelectric element and having a thickness of at least one-quarter of a wavelength of a center resonant frequency of the transducer, and a front metal layer arranged on a surface of the acoustic matching layer opposite that of the piezoelectric element and having a thickness equal to one-half of the wavelength of the center resonant frequency.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: June 18, 2019
    Assignee: MEASUREMENT SPECIALTIES, INC.
    Inventor: Minoru Toda
  • Patent number: 10203255
    Abstract: A differential pressure sensor may provide a common mode corrected differential pressure reading. The differential pressure sensor may include two pressure sensing diaphragms. The pressure sensor may be configured so that the first diaphragm measures the differential pressure between two sections of a fluid. The pressure sensor may also be configured so that the second diaphragm measures the common mode error experienced by the die at the time the differential pressure is read by the first diaphragm. Electrical connectors may be configured so that the differential pressure outputs a common mode error corrected differential pressure reading based on the readings of the first and second diaphragm.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: February 12, 2019
    Assignee: Measurement Specialties, Inc.
    Inventors: David E. Wagner, James H. Hoffman, Natasha V. Kachenko
  • Publication number: 20180364133
    Abstract: A fluid quality sensor for measuring a quality of a fluid comprises a measurement section mounted to an output side of a pump for the fluid.
    Type: Application
    Filed: June 14, 2018
    Publication date: December 20, 2018
    Applicants: MEAS France, Wema System AS, Measurement Specialties, Inc.
    Inventors: Jean Milpied, Paul Wafo, Armand Castandet, Marius Norvoll Sletten, Michael Pedrick
  • Patent number: 10158361
    Abstract: A device for detecting a touch at a surface of a substrate comprises a piezoelectric element positioned at a back surface of the substrate to be touched. A drive circuit is configured to apply a frequency modulated drive signal to the piezoelectric element to detect resonance at the substrate. A first detector arrangement coupled to the piezoelectric element is configured to generate a first output signal indicative of a sensed touch or no touch condition according to detected voltage changes and responsive to the frequency modulated drive signal applied to the piezoelectric element. A second detector arrangement coupled to the piezoelectric element is configured to generate a second output signal indicative of a sensed touch or no touch condition according to a sensed strain on said piezoelectric element. A decision circuit including a processor is configured to identify a touch condition or no touch condition at the surface of the substrate according to the first and second output signals.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: December 18, 2018
    Assignee: Measurement Specialties, Inc.
    Inventors: Minoru Toda, Kyung- Tae Park
  • Patent number: 10001428
    Abstract: A miniature pressure scanning system may comprise: a plurality of miniature pressure sensors including a plurality of sensor outputs, each of the miniature pressure sensors including at least one sensor output for providing an analog output signal and each at least one sensor output having an associated output impedance; a plurality of buffers, each buffer of said plurality of buffers being electrically coupled to one sensor output of the plurality of sensor outputs, and each said buffer being operative to reduce a settling time constant associated with multiplexer voltage spikes and reduce the associated output impedance of the one sensor output coupled to it; and at least one multiplexer electrically coupled to the plurality of sensor outputs, said at least one multiplexer being operative to be switched between each of the plurality of sensor outputs.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: June 19, 2018
    Assignee: MEASUREMENT SPECIALTIES, INC.
    Inventor: Steven Mark Keeter
  • Patent number: 9964483
    Abstract: A low-temperature safe sensor package. The package includes a housing having an internal cavity, an inlet port in communication with the internal cavity and a fluid source, and an outlet port in communication with the internal cavity. A sensor carrier is moveably arranged within the internal cavity. A spring element is arranged between the sensor carrier and a portion of the housing for biasing the sensor carrier into an operating position within the internal cavity.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: May 8, 2018
    Assignee: MEASUREMENT SPECIALTIES, INC.
    Inventors: John Coates, Robert Qualls
  • Patent number: 9851295
    Abstract: An optical spectral sensing device for determining at least one property of a fluid. The device has an elongated porous body, a first end and a second end, a solid-state optical emitter at the first end of the body oriented to emit radiation toward the second end of the body, and a solid-state optical detector at the second end of the body oriented to detect radiation emitted by the optical emitter and to output a signal responsive to absorption of radiation. The device is configured to determine depth of a fluid based on the signal output by the optical detector.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: December 26, 2017
    Assignee: MEASUREMENT SPECIALTIES, INC.
    Inventors: John Coates, Robert Qualls
  • Patent number: 9713825
    Abstract: A multilayer backing absorber for use with an ultrasonic transducer comprises a plurality of absorber elements, each absorber element having at least one metal layer and at least one adhesive layer, wherein the backing absorber is adapted to be coupled to a vibrating layer of the ultrasonic transducer.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: July 25, 2017
    Assignee: Measurement Specialties, Inc.
    Inventors: Minoru Toda, Mitchell L. Thompson
  • Patent number: 9698776
    Abstract: A system and method for ultrasonic touch switch combined with piezoelectric touch mode is described. The sensor structure may be embodied as a substrate with a piezoelectric element at the back surface of the substrate, with the front surface being a touch sensitive surface. Both operational modes are possible by use of the same sensor element with filtering of the signals so that different advantages of two modes are combined, while disadvantages of either mode are mitigated. The tolerance of substrate thickness of ultrasonic touch mode is improved by use of a wide range of frequency deviation of drive signal by filtering out the fundamental modulation frequency from the output signal and wherein only sharp pulses corresponding to abrupt impedance changes of the piezoelectric element are extracted. The amplitude of the sharp pulses decreases with touching the front surface of substrate.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: July 4, 2017
    Assignee: Measurement Specialties, Inc.
    Inventors: Minoru Toda, Kyung Tae Park
  • Patent number: 9593995
    Abstract: A differential pressure sensor includes a pressure sensing die comprising a semiconductor die, having a thinned portion forming a diaphragm. The diaphragm includes piezo-resistive elements that exhibit varying resistance based on force exerted on the diaphragm. A first support structure is bonded to a first surface of the semiconductor die, having an aperture defined through the support structure such that a first surface of the diaphragm is exposed through the aperture. A second support structure is bonded to the opposite side of the semiconductor die having an aperture aligned with the opposing side of the diaphragm. Electrical components in electrical communication with the piezo-resistive elements are arranged outside the region defined by the bond between the first and second support structures and the semiconductor die. An oil-filled volume may be defined between the semiconductor die and a harsh medium which transmits a fluid pressure to the die without the harsh medium contacting the die.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: March 14, 2017
    Assignee: Measurement Specialties, Inc.
    Inventors: David E. Wagner, John J. Valentini
  • Patent number: 9546913
    Abstract: Disclosed herein, among other things, is a stator winding temperature sensor. According to an embodiment, the sensor includes at least one sensing wire coil adapted to be connected to a stator. The sensor also includes a body, including a core material surrounding at least a portion of the sensing wire coil, and a laminate material over the core material. The body has a thickness adapted to protect the sensing wire coil. The sensor includes a lead wire adapted to connect to an external monitoring device. The sensing wire coil is electrically connected to the lead wire at a lead step portion of the sensor. In addition, the sensor includes a tab extending from the lead wire and encompassing the lead step. The tab protects the lead step and the sensing wire coil in a region where the sensor extends over an end of the stator.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: January 17, 2017
    Assignee: MEASUREMENT SPECIALTIES, INC.
    Inventors: Brad Lesmeister, Peter David Bernier, Mark Stewart
  • Patent number: 9534975
    Abstract: A pressure sensor assembly for measuring the pressure of a first fluid. The assembly having a first housing including a pressure sensing device arranged therein. A diaphragm is arranged on a surface of the first housing and is configured to transmit a force exerted on a first side thereof to the pressure sensing device. A second housing is provided and attached to the first housing. The second housing may be arranged generally circumferentially around the diaphragm. A compressible element is provided and arranged within a compressible element space defined within the second housing. The compressible element is configured to transmit a force exerted thereon by the fluid to the first side of the diaphragm.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: January 3, 2017
    Assignee: MEASUREMENT SPECIALTIES, INC.
    Inventors: Natasha V. Kachenko, David E. Wagner, Weijun Xie
  • Patent number: 9335225
    Abstract: A deformation sensor package includes a housing having a base and a peripheral wall extending from the base. The base and peripheral wall define two cavities each configured to receive a potentiometer, such as a string potentiometer. The peripheral wall defines two apertures formed between a respective cavity and an exterior of the housing. Each aperture is configured to allow for the passage of a moveable sensing end of an associated potentiometer therethrough.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: May 10, 2016
    Assignee: Measurement Specialties, Inc.
    Inventors: Han Xu, Anthony S. Chu, Barry A. Singer
  • Patent number: 9322773
    Abstract: An optical spectral sensing device for determining at least one property of a fluid. The device has an elongated porous body, a first end and a second end, a solid-state optical emitter at the first end of the body oriented to emit radiation toward the second end of the body, and a solid-state optical detector at the second end of the body oriented to detect radiation emitted by the optical emitter. A package for detecting properties of a fluid includes a body defining a cavity, with a movable and biased carrier for an optical detector or emitter mounted in the cavity for increased reliability. A system for determining relative concentrations of fluids in a sample includes emitter/detector pairs operating at reference wavelength and wavelengths corresponding to absorption peaks of at least two fluids, and a processor for determining concentration based on measured data and calibration data.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: April 26, 2016
    Assignee: Measurement Specialties, Inc.
    Inventors: John Coates, Robert Qualls
  • Patent number: 9316552
    Abstract: A differential pressure sensor includes a pressure sensing die comprising a semiconductor die, having a thinned portion forming a diaphragm. The diaphragm includes piezo-resistive elements that exhibit varying resistance based on force exerted on the diaphragm. A first support structure is bonded to a first surface of the semiconductor die, having an aperture defined through the support structure such that a first surface of the diaphragm is exposed through the aperture. A second support structure is bonded to the opposite side of the semiconductor die having an aperture aligned with the opposing side of the diaphragm. Electrical components in electrical communication with the piezo-resistive elements are arranged outside the region defined by the bond between the first and second support structures and the semiconductor die. An oil-filled volume may be defined between the semiconductor die and a harsh medium which transmits a fluid pressure to the die without the harsh medium contacting the die.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: April 19, 2016
    Assignee: MEASUREMENT SPECIALTIES, INC.
    Inventors: David E. Wagner, James H. Hoffman, Kaspar L. Jenni