Abstract: This disclosure provides example methods, devices, and systems for a sensor having a front seal. In one embodiment, a system may comprise a sensing element; a header coupled to the sensing element; a housing coupled to the header; an adaptor coupled to the housing, wherein a first gap separates the adapter and the sensing element and a second gap separates the adapter and the header; and wherein a stress applied at a front surface of the adapter is transferred to the housing, and the first gap is used to isolate the sensing element from the stress and the second gap is used to isolate the header from the stress.

Abstract: The invention describes a pressure transducer having a pressure measuring cell, a position sensor, and an analysis device which has at least one signal processing device and a position correction device for the purpose of determining a position error, wherein the at least one position sensor is arranged in a stationary position relative to the pressure measuring cell, and the position sensor is electrically connected to the position correction device, wherein a first signal is provided by the signal processing device, said signal being determined from a signal provided by the pressure measuring cell, wherein a second signal is provided by the position sensor, and wherein an output signal is provided by the position correction device, determined from the first and the second signals.

Abstract: A sensor system includes a microelectromechanical systems (MEMS) sensor, control circuit, signal evaluation circuitry, a digital to analog converter, signal filters, an amplifier, demodulation circuitry and memory. The system is configured to generate high and low-frequency signals, combine them, and provide the combined input signal to a MEMS sensor. The MEMS sensor is configured to provide a modulated output signal that is a function of the combined signal. The system is configured to demodulate and filter the modulated output signal, compare the demodulated, filtered signal with the input signal to determine amplitude and phase differences, and determine, based on the amplitude and phase differences, various parameters of the MEMS sensor. A method for determining MEMS sensor parameters is also provided.

Abstract: A quality-control device comprises a housing, a biasing member disposed within the housing, and a reciprocating puncturing member that is configured and oriented to selectively move inwardly of the housing in opposition to the biasing member. A maximum-compression indicator is configured to move inwardly of the housing in tandem with the puncturing member and a gauge serves to correlate a particular location of the maximum-compression indicator to a corresponding measure of compression as corresponds to a material being tested for quality. By one approach the indicator moves in response to inward movement of the puncturing member but is also configured to not move when the puncturing member moves outwardly of the housing. So configured the maximum-compression indicator will remain located at a point that corresponds to the furthest inward incursion of the puncturing member in opposition to the biasing member when the user presses the puncturing member against the material.

Abstract: Disclosed are an apparatus and a method for sensing pressure using an optical waveguide sensor. The apparatus for sensing pressure using an optical waveguide sensor, includes: a light source radiating light; an optical waveguide panel emitting some of the radiated light outside through a plurality of light transmitting regions previously formed, and changing an amount of totally reflected light according to pressure applied to at least one of the plurality of light transmitting regions; a detector detecting the amount of light; and an analyzer determining intensity and a location of the pressure according to the detected amount of light.

Abstract: A differential pressure sensor for sensing a differential pressure of a process fluid, includes a sensor body having a sensor cavity formed therein with a cavity profile. A diaphragm in the sensor cavity deflects in response to an applied differential pressure. The diaphragm has a diaphragm profile. A gap formed between the cavity profile and the diaphragm profile changes as a function of the differential pressure. At least one of the cavity profile and diaphragm profile changes as a function of a line pressure to compensate for changes in the gap due to deformation of the sensor body from the line pressure.

Abstract: A system and method to detect particles in a fluid stream. The system includes a separator configured to separate particles from bubbles passing through the fluid stream and a sensor configured to detect the particles. The method includes passing the fluid stream through the separator, separating the particles from bubbles passing through the fluid stream, and detecting the presence of the particles.

Abstract: A muzzle exit tester system comprises a barrel having an input end and an exit end, a shock plunger freely movable within the barrel, and a shock plate having a first side that faces the exit end of the barrel. A support isolation structure resiliently supports the shock plate, and receives a portion of the barrel that includes the exit end of the barrel. A pneumatic shock apparatus is operatively coupled to the input end of the barrel. The pneumatic shock apparatus is configured to retract the plunger in the barrel via a vacuum while producing a gas pressure charge, and subsequently release the gas pressure charge, such that the plunger accelerates to the exit end of the barrel and impacts the shock plate. The shock plate is configured to resonate at frequencies and amplitudes corresponding to a shock condition of a gun muzzle exit when impacted by the plunger.

Abstract: A system for estimating a flow rate of an agrichemical includes a conduit delivering the agrichemical from a repository to an application in a field, and a flow meter connected in-line with the conduit. The flow meter provides an estimate of a flow rate of the agrichemical through the conduit.

Abstract: A tornado data acquisition system comprises a kite having a cable coupled thereto. The data acquisition also includes a winch rope rotatably coupled to a mounting plate and a sensor module coupled to the kite. The sensor module comprises a plurality of sensors for generating sensor signals corresponding to tornado characteristics. A data acquisition system wirelessly receives the sensor signals and stores the data corresponding to the sensor signals in a memory.

Abstract: A sensor for measuring pressure and/or force includes at least one measuring assembly having at least one piezoelectric measuring element subjected to compressive stress for dynamic pressure and/or force measurement, and a diaphragm for introducing the pressure and/or the force onto at least the piezoelectric measuring element. The sensor also includes a further measuring assembly that is based on a different physical measuring principle for measuring static pressure and/or force.

Abstract: Methods and apparatuses are disclosed that assist in sensing underwater signals in connection with geophysical surveys. One embodiment relates to a transducer including a cantilever coupled to a base. The cantilever may include a beam and a first coupling surface angularly oriented from the beam, and the base may include a second coupling surface angularly oriented from the beam and substantially parallel to the first coupling surface of the cantilever. The transducer may further include a sensing material coupled between the first coupling surface of the cantilever and the second coupling surface of the base.

Abstract: An optical fiber environmental detection system comprising an interferometer, a broadband light source and a detector is disclosed. The interferometer further comprises a thin core fiber, a first single mode fiber and a second single mode fiber; wherein the thin core fiber is coupled to the first and second single mode fiber via a first junction and a second junction respectively. When an emission light reaches the first junction, high-order cladding modes will be excited. The excited cladding modes will interfere with the core mode at the second junction. The interferences determine the intensity maximum or minimum of the received signal. When there is an ambient environmental change, a shift of the received signal would be induced. According to the shift, environmental change, for instance ambient temperature, could be determined.

Abstract: A conveyance seat includes: a seating sensor structure including a pressure-sensing portion that is used to detect a pressure, the seating sensor structure being arranged inside a seat pad of the conveyance seat through integral foam-molding. The seating sensor structure is formed by laminating the pressure-sensing portion, a second sheet-shaped member and a first sheet-shaped member in this order from a seating face side. The first sheet-shaped member has a higher stiffness than the seat pad. The second sheet-shaped member has a lower stiffness than the first sheet-shaped member.

Abstract: A process pressure measuring system includes a transmitter having a first sealed system in which a first outlet couples to a pressure sensor, a first isolator diaphragm assembly, a first capillary passage, and a first isolation fluid. The first isolation fluid couples a first pressure from the first isolator diaphragm to the first outlet and the pressure sensor. A second sealed system includes a second pressure outlet that is coupled to the first isolator diaphragm assembly, a second isolator diaphragm assembly, a second capillary passage and a second isolation fluid. The second isolation fluid is adapted for use in a first temperature range and couples a pressure from the second isolator diaphragm assembly to the second pressure outlet. A third sealed system includes a third pressure outlet that is coupled to the second isolator diaphragm assembly, a third isolator diaphragm assembly, a third capillary passage and a third isolation fluid.

Abstract: According to one embodiment, a MEMS device is disclosed. The device includes a substrate, a first and second MEMS elements on the substrate. Each of the first and second MEMS elements includes a fixed electrode on the substrate, a movable electrode above the fixed electrode, a first insulating film, the first insulating film and the substrate defining a cavity in which the fixed and movable electrodes are contained, and a first anchor on a surface of the first insulating film inside the cavity and configured to connect the movable electrode to the first insulating film. The cavity of the first MEMS element is closed. The cavity of the second MEMS element is opened by a through hole.

Abstract: According to the present invention a flow meter is provided for measuring a fluid, comprising a measuring tube with a measuring piston movably arranged in said measuring tube, and elements for changing the direction of movement of the measuring piston in said measuring tube, wherein said measuring piston, when measuring, is designed to be moved in said measuring tube under the influence of said fluid. Sensor elements detect movement of the piston and the direction of movement in said measuring tube, and sensor elements detect when the piston is situated in at least one of its reversing areas before the measuring piston has reached the extreme point of the reversing area, so as to afford a substantially continuous flow detection for said fluid.

Abstract: A process for characterizing micro, meso, and/or macro porous materials is provided. The process includes providing a volumetric and/or gravimetric adsorption system, the adsorption system having an adsorption chamber and a probe gas at a first temperature. In addition, a porous material to be characterized is provided and placed within the adsorption chamber. Thereafter, a porosimetry run is conducted on the porous material. The porosimetry run includes: (a) selecting an uptake target value; (b) selecting a target interval bounding the target uptake target value; (c) adjusting pressure within the adsorption chamber in order for the porous sample to reach the target uptake value; (d) adjusting pressure within the adsorption chamber until the pressure within the adsorption chamber is within the target interval for a predetermined amount of time; and (e) repeating steps (a)-(d) until the porosimetry run is complete.

Abstract: The thermometer using differential temperature measurements utilizes a pair of adjacent temperature sensors in order to measure the temperature of a common surface over a pre-selected period of time. The thermometer includes a housing and first and second thermistors mounted adjacent one another on the housing. The first and second thermistors are positioned against the surface, which can be a body part (for oral, rectal or axial body temperature measurements) or can be any other desired surface for which a spot check temperature reading is desired. A programmable current source pre-heats the second thermistor to a pre-selected temperature, while the first thermistor is initially at room temperature. A controller inside the housing causes both the first and second thermistors to take instantaneous temperature measurements of the surface at two successive times. The controller linearizes the measurements to predict the temperature of the surface, which is then displayed to the user.

Abstract: A tire wear state estimation system includes a tire pressure measuring device affixed to a vehicle tire for measuring tire inflation pressure and generating tire inflation pressure data; tire torsional mode measuring means for measuring tire torsional mode frequency and generating tire torsional mode frequency data; and tire identification means for generating tire-specific torsional mode coefficients using tire-specific identification data. A tire wear estimation is made based upon the tire inflation pressure data, the torsional mode frequency data, and the tire identification derived torsional mode coefficients.