Qasimi
Mohammad Abdul Javvad Qasimi, Hilliard, OH US
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20110226053 | FLOW SENSOR ASSEMBLY WITH POROUS INSERT - The present disclosure relates generally to flow sensors, and more particularly, to methods and devices for reducing variations in fluid flow across the flow sensor for increased accuracy and/or reliability. In one illustrative embodiment, a flow sensor assembly includes a housing with an inlet flow port and an outlet flow port. The housing defines a fluid channel extending between the inlet flow port and the outlet flow port, with a flow sensor positioned in the housing and exposed to the fluid channel. The flow sensor is configured to sense a measure related to the flow rate of a fluid flowing through the fluid channel. A porous insert is situated in the fluid channel, sometimes upstream of the flow sensor. When so configured, and during operation of the flow sensor assembly, a fluid may pass through the inlet flow port, through the porous insert, across the flow sensor, and through the outlet flow port. The porous insert may include pores that are configured to reduce the turbulence in the fluid passing the flow sensor. | 09-22-2011 |
Mohammed Abdul Javvad Qasimi, Hilliard, OH US
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20120035866 | FLOW SENSOR WITH PRESSURE OUTPUT SIGNAL - This disclosure relates generally to flow sensors, and more particularly, to flow sensors that include a pressure related output signal. In one example, a flow sensor assembly may include a housing with an inlet flow port, an outlet flow port and a fluid channel extending therebetween, with a flow sensing element positioned in the housing and exposed to the fluid channel. A filter insert may be situated in the fluid channel, sometimes upstream of the flow sensor. When so configured, the flow sensor assembly may output a pressure or differential pressure based, at least in part, on a value of the flow rate through the fluid channel as sensed by the flow sensor. | 02-09-2012 |
20130055826 | MEMS AIRFLOW SENSOR DIE INCORPORATING ADDITIONAL CIRCUITRY ON THE DIE - A MEMS airflow sensor die having a heater control circuit, differential instrumentation amplifier, temperature compensation, and/or offset correction circuitry integrated with an airflow sensor on the MEMS die. The added circuitry may be placed on space available on the basic airflow die with MEMS fabrication techniques without enlarging the sensor die. The die with the added circuitry may result in a device having a reduced form factor, improved reliability and lower cost. | 03-07-2013 |
20130139584 | FLOW SENSOR ASSEMBLY - A flow sensor assembly that may include features that help prevent moisture from reaching a sensor die of the flow sensor assembly. In some cases, such features may include a bypass channel that is configured to reverse the direction of the flow of fluid at least once upstream of the sensor die. In some cases, an encapsulant may cover one or more bond pads of the sensor die. In some cases, an output of the flow sensor assembly may be a raw sensor output signal produced by the one or more sensor elements of the sensor die, without significant processing of the raw sensor signal. | 06-06-2013 |
20140083209 | MECHANICALLY COUPLED FORCE SENSOR ON FLEXIBLE PLATFORM ASSEMBLY STRUCTURE - A force sensor system includes a substrate, a cover, a sensor, and a spherical force transfer element. The cover is coupled to the substrate, and has an inner surface, an outer surface, an opening extending between the inner and outer surfaces, and a wall structure extending from the inner surface that defines a sensor cavity between the inner surface and the substrate. The sensor is mounted on the substrate, is disposed within the sensor cavity, and is configured to generate a sensor signal representative of a force supplied to the sensor. The spherical force transfer element is disposed partially within the sensor cavity, is movable relative to the cover, extends from the opening in the cover, and engages the sensor. The spherical force transfer element is adapted to receive an input force and is configured, upon receipt of the input force, to transfer the input force to the sensor. | 03-27-2014 |
Mohammed A.j Qasimi, Freeport, IL US
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20080265711 | Mechanical packaging of surface acoustic wave device for sensing applications - A method and apparatus, wherein a die is attached to a supporting base structure utilizing a rigid bond adhesive for a SAW (Surface Acoustic Wave) sensor. A rigid bond adhesive with a preferably high glass transition temperature (Tg) can be applied directly between the die and the die supporting structure in a pattern to eliminate time dependent gradual stress effects upon SAW sensor. The rigid bond adhesive can then be cured, which results in a high yield strength and a high young's modulus. The supporting base and the die material comprise a same co-efficient of thermal expansion in order to avoid die displacement over temperature. | 10-30-2008 |
20090165546 | WIRELESS AND BATTERYLESS SENSOR - A wireless and batteryless pressure sensor apparatus comprises of a SAW sensor and an antenna mounted on a printed circuit board. Optionally, and RFID tag in used in combination with the SAW sensor. A sensor antenna and a RFID antenna can be located on the printed circuit board such that the antennas communicate electrically with the sensor and the RFID device. The sensor can be interrogated utilizing a radio frequency, which is used to excite a SAW crystal inside the sensor. The interrogation signal causes the SAW to resonate wherein a resonant frequency changes with the pressure and temperature that is applied to the sensor. An interrogator can receive a return (echo) signal representing a change in SAW sensor properties (e.g., diaphragm change). A printed circuit board can be mounted on a stainless steel port and overpackaged with standard processes for hermetically sealing the sensor, or sensor and RFID device with at least one antenna. | 07-02-2009 |
Mohammed A J Qasimi, Columbus, OH US
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20090167503 | WIRELESS AND BATTERYLESS SENSOR - The SAW sensor in a stainless steel button package having a diaphragm and mounted on a threaded port. Package can hermetically seal a sensor and RFID-antenna assemblies from media. Sensor diaphragm is exposable to media. Sensor and RFID antennas communicate electrically with SAW sensor and RFID device, respectively, for sensor measurements and identification. Antennas receive RF interrogation signal from a nearby interrogator/transceiver and send reflected RF signals back to the interrogator unit containing sensor measurement and sensor ID. TRF signal excites a SAW resonator inside the sensor and causes the SAW to resonate wherein resonant frequency changes with pressure and temperature applied to the sensor. Antennas could be printed circuit board antennas, helical antennas, loop antennas, any other commercially available off-the-shelf antennas or a combination of these. | 07-02-2009 |
Mohammed A. Javvad Qasimi, Hilliard, OH US
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20110146398 | FLOW SENSORS HAVING NANOSCALE COATING FOR CORROSION RESISTANCE - A corrosion resistant flow sensor apparatus includes a flow sensor including a micromachinable substrate mounted on a package substrate that includes electrically conductive traces and substrate bond pads. The flow sensor includes a MEMS sensing structure for sensing a mass flow parameter and sensor bond pads coupled to the sensing structure. The sensor bond pads include a top metal layer on a metal diffusion barrier layer including a metal diffusion barrier layer sidewall. Bond wires couple the sensor bond pads to the substrate bond pads. A housing including sides and a top portion is around the flow sensor and includes a flow channel having an inlet and an outlet. A multi-layer corrosion protection coating includes a nm scale adhesion layer and a self assembled monolayer (SAM) is on the adhesion layer. The protection coating covers the sensor bond pads including the metal diffusion barrier layer sidewall. | 06-23-2011 |
20120192645 | FLOW SENSORS HAVING NANOSCALE COATING FOR CORROSION RESISTANCE - A corrosion resistant flow sensor apparatus includes a flow sensor including a micromachinable substrate mounted on a package substrate that includes electrically conductive traces and substrate bond pads. The flow sensor includes a MEMS sensing structure for sensing a mass flow parameter and sensor bond pads coupled to the sensing structure. The sensor bond pads include a top metal layer on a metal diffusion barrier layer including a metal diffusion barrier layer sidewall. Bond wires couple the sensor bond pads to the substrate bond pads. A housing including sides and a top portion is around the flow sensor and includes a flow channel having an inlet and an outlet. A multi-layer corrosion protection coating includes a nm scale adhesion layer and a self assembled monolayer (SAM) is on the adhesion layer. The protection coating covers the sensor bond pads including the metal diffusion barrier layer sidewall. | 08-02-2012 |
Pooran Qasimi, Surrey, CA US
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20110171645 | METHODS OF DIAGNOSING ACUTE CARDIAC ALLOGRAFT REJECTION - The present invention relates to methods of diagnosing acute rejection of a cardiac allograft using genomic expression profiling, proteomic expression profiling, metabolite profiling, or alloreactive T-cell genomic expression profiling, | 07-14-2011 |