Abstract: A semiconductor pressure sensor includes: a case; a pressure inlet port through which a measurement target fluid is introduced into the case; an atmosphere inlet port through which atmosphere is introduced; and a sensor chip configured to measure the pressure of the fluid with respect to atmospheric pressure. The pressure inlet port and the atmosphere inlet port are disposed on the same surface side of the case. The pressure inlet port is communicated with the inside of the case.

Abstract: A pressure gauge mounted to a pump or a back pressure regulator in an HPLC, SFC, or SFE system provides improved solvent exchange and improved measurement precision. A through hole having an inside diameter of 1.0 mm is made in a hexagonal member similar in shape to a pipe joint. A part of the hexagonal member is cut away to form a flat surface such that the distance to the outside periphery of the through hole is 0.5 mm to serve as a strain-measurement strain gauge attaching surface. One strain gauge is attached to the center of the strain-measurement strain gauge attaching surface, and two strain gauges are attached for temperature correction, one on the same surface as the strain-measurement strain gauge attaching surface and the other on an outside surface of the hexagonal member.

Abstract: A resonant sensor is disclosed which may be arranged to measure the pressure of a fluid. The resonant sensor comprises a diaphragm which may be exposed to a fluid; two supports provided on the diaphragm and a resonator having at least two beams with each beam being suspended between the two supports. The ends of each beam are attached to a corresponding support at more than one point. By attaching each end of the beams to a support at more than one point, the moments and reaction forces to which the support is subjected may be balanced so that distortion of the support and diaphragm due to vibration of the resonator beams is reduced. Consequently, the resonant sensor is able to provide more precise measurements.

Abstract: The disclosed invention describes an unpowered apparatus which can wirelessly sense pressure based on microfluidics for point-of-care glaucoma diagnosis. Moreover, the disclosed invention teaches methods to construct the invention using microfabrication processing. Finally, a detailed and illustrative schematic of the wireless readout system is disclosed.

Abstract: A physical quantity detector includes a diaphragm including a displacement part that is displaced under external pressure, a ring-shaped fixing part that holds an outer circumferential part of the diaphragm, a holding member having a projection part that projects from an inner circumference of the fixing part toward a center at one surface side of the diaphragm, a support fixed to the projection part, and a pressure-sensitive device having a first base part fixed to the displacement part, a second base part fixed to the support, and a pressure-sensitive part provided between the base parts.

Abstract: Fabry-Perot and Bragg grating optical measuring principles are combined with a torsional stress sensing mechanism that converts torque applied in one fluid environment to force exerted in a second environment to measure extreme environmental parameters such as pressure in a petroleum producing borehole.

Abstract: An apparatus for testing an implement having an elongate shaft with a head end and a grip end, with a head attached to the head end. The apparatus may include a wind tunnel with a test cell adapted to receive the head of the implement and permit a range of unrestricted movement of the head within the test cell. The test cell includes an inlet and outlet for air flow and a portal or opening in a wall of the cell to which an elongate conduit is attached. The conduit extends in a direction substantially normal, or radial, to the direction of airflow. The conduit is adapted to receive the shaft of the implement, with the grip end of the implement extending beyond the far end of the conduit and into a clamp. The clamp is adapted to hold the grip end of the shaft in a fixed position.

Abstract: Method for determining the thickness of an upper layer of a fluid mass comprising at least this upper layer and a lower layer lying thereunder, such as a waterway with a navigable upper layer and a viscous mud layer located thereunder, wherein the viscosity of the fluid of the lower layer is greater than the viscosity of the fluid of the upper layer, wherein a body freely movable in the fluid mass is moved through the fluid mass at a velocity such that the body enters a state of equilibrium substantially at the interface between the lower and upper layer; the depth position of the body is determined at successive points in order to know the thickness of the upper layer at these points; and the resistivity of the fluid in the vicinity of the body is measured at successive points.

Abstract: A method for removing interference-induced distortion effects from an environment used to experimentally measure aerodynamic signatures. A space marching algorithm is used to extract the effects of environment including rail and wall reflections and rail edge effects to create an interference-free pressure signature.

Abstract: Techniques disclosed herein include systems and methods for pressure measurement of fluids including vehicular fluids. The pressure sensor includes a MEMS die for pressure measurement. The MEMS die is attached to a glass pedestal member. The pedestal member is mechanically held in place via a mounting frame that attachable to a pressure port of a fluid-containing enclosure. Techniques herein provide a strong connection of a MEMS die to a pressure sensor while decoupling thermal expansion stress from the MEMS die. With such decoupling techniques, pressure sensing reliability and accuracy can be improved. With thermal expansion stress decoupled from the MEMS die, sensor sealing materials can be selected for their robust chemical properties instead of structural properties. Such techniques provide an accurate, durable, and cost-effective pressure sensor.

Abstract: Systems and methods, including: one of a simulated road surface and an actual road surface; a test tire physically contacting the one of the simulated road surface and the actual road surface; and a plurality of gears linking the test tire and the one of the simulated road surface and the actual road surface, such that the velocities of the test tire and the one of the simulated road surface and the actual road surface are linked and an associated slip ratio between the test tire and the one of the simulated road surface and the actual road surface is controlled. The simulated road surface includes one of a drum, a belt, a drive wheel, and a rail. The plurality of gears are varied in terms of gear ratio using a controller such that slip ratio is dynamically controlled and varied.

Abstract: There is disclosed a high pressure sensing header which is relatively insensitive to mounting torque. The header generally includes an outer torque isolating shell which has a “C” shaped cross section with the cylindrical shell surrounding an inner “H” section header. The inner “H” section header has a thick diaphragm and is at least partially surrounded by the torque isolating shell. In this manner, when the header is installed, the installation force is absorbed by the outer shell and there is relatively no installation force or torque exhibited by the inner “H” section which will respond only to stress due to pressure.

Abstract: A method for manufacturing measuring transducers, especially pressure or pressure difference measuring transducers, in which a high degree of quality, safety and accuracy of measurement is achievable with little logistical and manufacturing effort. The measuring transducer has a memory readable and writable via an associated RFID interface, and at least one sensor for registering a physical, measured variable and for transducing such into an electrical variable, wherein the sensor is equipped with sensor electronics, which serves to condition the electrical variable into an electrical measurement signal dependent on the measured variable, and which is equipped with an RFID transponder, via which the sensor is supplied with energy, and via which measurement signals can be read out wirelessly.

Abstract: There is provided a wind tunnel model measuring system for use with a wind tunnel. The system has a measuring assembly with an automated movable structure with at least one measuring device mounted thereon and configured for placement within the wind tunnel, and a measuring controller device located outside the wind tunnel to control the automated movable structure in order to remotely move the automated movable structure from a storage position within the wind tunnel to one or more operating positions with respect to a wind tunnel model within the wind tunnel and to allow the at least one measuring device to determine a relative position of at least one movable first component with respect to a second component, both of the wind tunnel model. The system further has a processing device configured for placement outside the wind tunnel and coupled to the measuring controller device.

Abstract: A gas monitoring system is disclosed. The gas monitoring system may have a first electrode in fluid communication with a first gas and a second gas, and a second electrode spaced apart from the first electrode to contain the second gas between the first and second electrodes. The gas monitoring system may also have a pulse generator configured to apply a series of voltage pulses to the first and second electrodes and create a plasma in the second gas. Each voltage pulse in the series of voltage pulses may have an incrementally higher voltage amplitude than a preceding voltage pulse in the series of voltage pulses. The gas monitoring system may further have a detection controller in communication with the pulse generator. The detection controller may be configured to detect breakdown of the second gas during application of one of the series of voltage pulses, and based on a voltage amplitude of the one of the series of voltage pulses, determine a parameter of the first gas.

Abstract: A pressure measuring device includes a partially coiled tube having a closed end and an opposite open end. The closed end is rolled and set into a coiled configuration. The device also includes a partially coiled tube supporting structure having a pressure indicating scale. The supporting structure holds the partially coiled tube such that the open end of the tube is in communication with a fluid whose pressure is to be measured. Pressure applied by the fluid causes the tube to unroll and the closed end of the tube to be visibly displaced relative to the pressure indicating scale by a distance related to the pressure applied by the fluid.

Abstract: Disclosed is a tire tester (1) provided with: a device frame (3); a slide base (10) provided on the device frame (3) so as to be able to move up and down; a large spindle (11) that is attached to the slide base (10) and can rotatably support a large-diameter tire (T1); and a small spindle (12) that is attached to the slide base (10) and can rotatably support a small-diameter tire (T2) that is smaller than the large-diameter tire (T1). The disclosed tire tester (1) can push one of the tires (T1 or T2) against a simulated road surface (5), by means of the up/down movement of the slide base (10), and perform a tire test.

Abstract: The present disclose relates to sensor including multiple sensor elements. In some cases, the multiple sensor elements may be mounted on a single substrate and each may be configured to sense a single parameter with different resolutions, sensitivities, and/or ranges, and/or the multiple parameters. In one example, multiple pressure sensing die may be mounted in a single package, and each may be configured as a differential pressure sensor, an absolute pressure sensor, and/or a gauge pressure sensor, as desired.

Abstract: A method is described for producing a pressure sensor assembly, the pressure sensor assembly having a sensor housing element having a pressure sensor and a base housing element, which have a continuous recess accommodating the pressure sensor and are welded to each other. It is provided that, after the welding, in the area of the welding connection, the recess of the base housing element and/or the sensor housing element is enlarged by material removal. A pressure sensor assembly is also described.

Abstract: A gauge pressure sensor for determining the pressure of a medium by means of a housing and by means of a measuring element, which is positioned in the housing, wherein an outwards facing side of the measuring element is in contact with the medium and is exposed to the pressure, which is to be measured. A tube for a reference pressure is provided, which conducts ambient air to the measuring element, and by means of at least one dehumidifying chamber, positioned in the housing, for the collection of air moisture.