Abstract: An angular rotation sensor system constituted of: an input shaft target and an output shaft target each comprising a plurality of members parallel to a longitudinal axis of an input shaft or output shaft; a gear target with an angular velocity exhibiting a predetermined ratio with an angular velocity of the input shaft, the gear target comprising a plurality of members, each extending away from the input shaft and orthogonal to a plane which is parallel to the longitudinal axis of the input shaft; and a control circuitry arranged to: determine an angular position of the input shaft responsive to a sensed angular rotation of the input shaft target and a sensed angular rotation of the gear target; and determine the amount of torque applied to the input shaft responsive to the sensed angular rotation of the input shaft target and a sensed angular rotation of the output shaft target.

Abstract: In the pressure sensor of the present application, at least two resistors are simultaneously formed on the foldable portion and the fixed portion to ensure the uniformity and consistency of the resistance values of all the resistors, and at least one is a strain sensing resistor R1, the foldable portion is folded to the fixed portion, and the resistors are electrically connected to form a pressure measuring circuit. Connecting the pressure sensor to the desired panel can accurately detect the curved deformation of the panel. The resistors in a pressure measuring circuit are adjacently distributed, and the resistance value of the resistor changes with temperature at the same time, so that the influence of the temperature change on the pressure measuring circuit is very small, and the interference against the external environment is good.

Abstract: A pressure sensor includes a piezoelectric substrate having a generally planar structure and an anchor location fixing the piezoelectric substrate at the periphery of the planar structure of the piezoelectric substrate. The planar structure of the piezoelectric substrate has a first region having a first characteristic thickness adjacent to the anchor location, and a second region have a second characteristic thickness at a middle region of the substrate. The second characteristic thickness is less than the first characteristic thickness such that the planar structure in the second region is displaced relative to the neutral axis of the planar structure such that while undergoing bending the second region has either mostly compressive or mostly tensile stress.

Abstract: Intelligent temperature and pressure gauge assemblies (52) for use with vessels (24) having pressurized hazard suppression materials therein include temperature and pressure sensors (136, 138) coupled with a digital processor (72) with associated memory for storing empirical temperature and pressure data. The data includes normalized linear temperature-pressure curves consistent with static or slowly changing temperature conditions experienced by the vessels (24), as well as nonlinear temperature-pressure curves consistent with rapidly changing temperature conditions. In use, the assemblies (52) repeatedly sense temperature and pressure conditions of the hazard suppression material and compare sensed values with stored values, and generate an output in conformance with the comparison. In this fashion, the assemblies (52) compensate for rapidly changing temperatures without generating false failure signals.

Abstract: A pressure sensor chip according to the present invention includes two static-pressure diaphragms (2, 3) formed by dividing an annular diaphragm arranged so as to surround a differential-pressure diaphragm (1). A reference pressure is applied to one surface of one static-pressure diaphragm (2), and a measurement pressure (Pa) for one surface of the differential-pressure diaphragm (1) is transmitted to the other surface of the static-pressure diaphragm (2) along a branched path. A reference pressure is applied to one surface of the other static-pressure diaphragm (3), and a measurement pressure (Pb) for the other surface of the differential-pressure diaphragm (1) is transmitted to the other surface of the static-pressure diaphragm (3) along a branched path. Accordingly, multiple differential-pressure measurement ranges can be provided.

Abstract: A pressure sensor chip according to the present invention includes an annular diaphragm that surrounds a periphery of a low-differential-pressure diaphragm (1) as a high-differential-pressure diaphragm (2). A measurement pressure (Pa) for one surface of the low-differential-pressure diaphragm (1) is transmitted to one surface of the high-differential-pressure diaphragm (2) along a branched path, and a measurement pressure (Pb) for the other surface of the low-differential-pressure diaphragm (1) is transmitted to the other surface of the high-differential-pressure diaphragm (2) along a branched path. Thus, multiple differential-pressure measurement ranges can be provided.

Abstract: A method of individually pressurizing a plurality of air tubes includes the steps of providing a sealed tube body, a pressure sensor, an inlet/outlet valve for each of the plurality of air tubes, a control unit, and an air circulation system. The steps also involve retrieving an initial pressure setting for each of the plurality of air tubes with the control unit; measuring a current pressure within the sealed body; comparing the initial pressure setting to the current pressure for each of the plurality of air tubes; opening the inlet/outlet valve of an off-pressure tube and pumping air into the sealed tube body of the off-pressure tube with the air circulation system, if the current pressure is lower than the initial pressure setting; and opening the inlet/outlet valve of the off-pressure tube and releasing air out of the sealed tube body of the off-pressure tube with the air circulation system, if the current pressure is higher that the initial pressure setting.

Abstract: A hinged structure includes a hinge that is actuatable using a hydraulic cylinder. A method of monitoring a load applied to the hinged structure involves leaking the hydraulic fluid from the hydraulic cylinder in a way that compensates for expansion of the hydraulic fluid caused by variations in temperature of the hydraulic fluid. The method further involves measuring the pressure of the hydraulic fluid in the hydraulic cylinder. The hydraulic cylinder may be part of a coiled tubing injector. The load applied to the hydraulic cylinder may be used to indicate an overload of the tubing guide.

Abstract: A pressure sensor device which uses appropriate passivation materials/patterns to make the device more robust and resistant to a hot and humid environment. The pressure sensor device uses moisture resistant passivation material(s) covering exposed glass areas, including sidewalls, and bonding interfaces to avoid the glass and bonding interfaces absorbing and reacting with moisture, thus maintaining the integrity of the device output after exposure in a humid/hot environment. These passivation materials/patterns used for the MEMS devices described may be applied to any MEMS based sensors and actuators using glass as one type of material for fabrication. The pressure sensor devices may be front side absolute pressure sensors, differential pressure sensors, or back side absolute pressure sensors.

Abstract: A sensing unit with an enclosure senses an environmental parameter that includes an environmental sensor to sense the environmental parameter. A processor enclosed within the enclosure receives a sensor signal from the environmental sensor related to the environmental parameter. A wireless communication circuit enclosed within the enclosure receives data from the processor for being transmitted wirelessly related to the environmental parameter. The wireless communication circuit is configured to wirelessly transmit the received data from the processor. The processor and the wireless communication circuit, including the wireless communication circuit wirelessly transmitting the received data, only receives power from a 4-20 ma input signal to the sensing unit from a remote controller.

Abstract: Provided is a pressure detection unit in which a waterproof property can be improved. In a pressure sensor, a sealing-resin portion is joined to an outside side surface of an element main body made of stainless steel, aluminum, or nickel such that the sealing-resin portion surrounds a plurality of lead pins. In the pressure sensor, a roughened annular surface portion is provided at a region where the sealing-resin portion is joined on an upper end surface of the element main body so as to be disposed in a manner to partition an external peripheral edge and an internal peripheral edge arranged at the outside side surface of an element main body in the sealing-resin portion.

Abstract: A physical quantity measuring device includes: a cylindrical portion having therein an inner space; a first case provided to a first end of the cylindrical portion; a sensor unit housed in the first case; a second case provided to a second end of the cylindrical portion; a circuit portion housed in the second case; a heat insulating portion disposed to face the sensor unit; a sealing portion that defines a hermetic seal between the heat insulating portion and an inner circumferential surface of the cylindrical portion; a first partition member that separates the sensor unit from the inner space at the first end; and a heat-insulative second partition member that is in contact with an opening edge or the inner circumferential surface of the second end and separates the inner space from the circuit portion near the second end.

Abstract: A pressure sensor for determining a pressure of a medium is configured to be screwed into a hydraulic control block, and includes a sleeve-shaped connector stub and sensor element. The stub has a plurality of axial sections, and an axial through bore configured to receive the medium. The axial sections include a threaded section, flange section, carrier section, and tapered portion. The flange section has an annular face facing the threaded section and configured to bear against a surface of the control block. The carrier section includes an inner opening that opens into the bore. The sensor element is positioned on the opening to sealingly close the opening, and is configured to measure the pressure of the medium. The tapered portion defines a reduction in a radial external diameter of the stub between the flange section and the carrier section.

Abstract: A cold cathode ionization vacuum gauge includes an extended anode electrode and a cathode electrode surrounding the anode electrode along its length and forming a discharge space between the anode electrode and the cathode electrode. The vacuum gauge further includes an electrically conductive guard ring electrode interposed between the cathode electrode and the anode electrode about a base of the anode electrode to collect leakage electrical current, and a discharge starter device disposed over and electrically connected with the guard ring electrode, the starter device having a plurality of tips directed toward the anode and forming a gap between the tips and the anode.

Abstract: A circuit, a method, and a computer program configured to detect mechanical stress and a circuit, a method, and a computer program configured to monitor safety of a system is disclosed. The detection circuit is configured to monitor a mechanical stress level of a semiconductor circuit. The detection circuit includes a stress monitor circuit configured to monitor a signal comprising mechanical stress level information of the semiconductor circuit, a reference circuit to generate a reference signal, and a calibration circuit configured to modify at least one of the stress signal or the reference signal based on calibration information for the semiconductor circuit to obtain a at least one modified signal.

Abstract: A method for correcting an ambient pressure measurement, a method for calculating a temperature, and an apparatus for affecting the same for an aircraft measuring system are provided. The methods include the steps of receiving an airspeed measurement from a laser sensor, receiving a total pressure measurement, and calculating an ambient pressure correction. A corrected ambient pressure or a calculated temperature may be calculated. The apparatus includes a laser sensor configured to provide an airspeed measurement, an aircraft instrument configured to provide a total pressure measurement, and a processing system.

Abstract: A system including a sensing device including a pressure sensor configured to measure pressure of water in a water system of a structure. The sensing device can be configured to generate pressure measurement data representing the pressure of the water as measured by the pressure sensor. The system also can include one or more processing units including one or more processors and one or more non-transitory storage media storing machine executable instructions configured when run on the one or more processors to perform detecting a non-cyclical pressure event corresponding to a water leak in the water system of the structure during a first time period based on an analysis of information including the pressure measurement data. The information analyzed in the analysis does not include any flow measurement data that represents a total amount of flow of the water in the water system of the structure during the first time period.

Abstract: An improved leakage testing device for attachment to a flexible wall of an item to be tested is provided with a film (4) that limits a hollow chamber (1) on the outer side of the item to be tested and with a leakage (2), said film (4) being designed to adhere to the item to be tested.

Abstract: A method for assessing the similarity between a power profile of a manufactured optic device and a nominal power profile upon which the power profile of the manufactured optic device is based. The method comprises measuring the power profile of manufactured optic device, identifying a region of interest from the measured power profile of manufactured optic device, and applying an offset to the measured power profile to substantially minimize a statistical quantifier for quantifying the similarity between the nominal power profile and the offset measured power profile. The method further comprises comparing the offset and the statistical quantifier to predefined quality control metrics, determining whether the measured power profile meets the predefined quality control metrics based, at least in part on the comparison.

Abstract: A device and method for geometrically measuring an object, with a base and a carrier device arranged thereon for the object, at least one reference object which can be fixed relative to the base, at least one distance measuring system, by means of which a distance between the reference object and the surface of the object facing the reference object can be determined, and an object holder having an upper side and a lower side, to which the object can be attached, wherein the object holder can be selectively arranged in a first orientation and a second orientation on the carrier device, wherein the distance measuring system and the object holder are movable relative to each other in order to scan the surface of the object, and the object holder has on the upper side thereof and on the lower side thereof respective reference structures.

Abstract: A method and system for operating fiber optic monitoring systems utilizing solar panels, batteries, and an interrogator system with associated electronics for operating in cold climates.

Abstract: A image acquisition device comprises a light source unit, a digital micro mirror, an optical transfer medium, an imaging unit, and a beam splitter, wherein a single focusing pattern light is formed to be focused on a single specific point when the focusing pattern light penetrates the optical transfer medium, and specific points focused by each of the plurality of focusing pattern lights scan the object to be measured such that the object to be measured is imaged. Therefore, when an image is obtained through an optical transfer medium such as an optical fiber, pixelation and aberration can be avoided regardless of the type of optical transfer medium and an image having high resolution can be obtained fast without a separate scanner.

Abstract: A diagnostic device includes an acquisition unit, first and second measurement units, a generation unit, and a guidance unit. The acquisition unit accepts a produced sound as input and acquires sound information. The first measurement unit measures a distance from a standard position. The second measurement unit measures a change in orientation from a standard state. The generation unit generates appropriate position information, the appropriate position information being the distance from the standard position to the diagnostic device measured by the first measurement unit, and the change in orientation from the standard state measured by the second measurement unit. The guidance unit uses the appropriate position information to guide the diagnostic device to an appropriate position when acquiring the sound information.

Abstract: Provided is a railway vehicle bearing abnormality sensing system that can accurately perform abnormality determination for railway vehicle bearings. The system (100) senses an abnormality in a plurality of rolling bearings (17) housed in an axle box (3) provided to a bogie (2). The system (100) includes: vibration detection devices (15) each detecting vibration of a rolling bearing; an analysis device (6) determining an abnormality in the bearings (17) on the basis of detection data detected by the device (15); and reception response detection start module (13) receiving a detection start signal and cause the device (15) to detect vibration of the rolling bearing. The system (100) further includes a measurement start command transmitting device (4), installed apart from a railway vehicle, transmitting the detection start signal to the module (13).

Abstract: A temperature display device of a vehicle is provided, which includes a temperature sensor for detecting a temperature of coolant of an engine, the coolant being switched in circulation state by opening and closing a thermostat, between a first state where the coolant is circulated through a radiator and a second state where the coolant is circulated bypassing the radiator, a display unit for displaying a temperature of the coolant, and a controller for controlling a display mode of the display unit based on the detected temperature by the temperature sensor. When the detected temperature changes within a first temperature range where the thermostat is in an open state, the controller changes the displayed temperature on the display unit by less than the change of the detected temperature.

Abstract: Engine health monitoring is used to assess the health of an engine, such as a gas turbine engine. Blades mounted on a shaft produce a modal response when excited. The shaft has an order related component that varies with the rotational velocity of the shaft. Modal responses are increased when the natural frequency range of the selected blade mode intersects with one of the order related components. By applying a short time chirp-Fourier transform with a frequency speed that is a function of a rate of change in the rotational velocity of the shaft a selected signal can be isolated. Cracks in the blades can be detected from the isolated signal.

Abstract: Systems and methods for determining turbine engine system stability encompass measuring or otherwise determining values of performance parameters, storing a data set of such values in memory, generating a stability indicator, and displaying the stability indicator on an operator interface. The stability indicator is generated by a processor operating in data communication with the computer memory, utilizing customized software algorithms to remove high frequency components, apply an adaptive filter to adjust selected parameters according to a target value of a selected target parameter, and apply a stochastic filters to estimate true values of the selected parameters, based on the remaining variation.

Abstract: A system for controlling an operation of a combustor in a gas turbine that includes: an acoustic sensor configured to periodically measure a pressure of the combustor and generate a raw data stream having the pressure data points resulting from the periodic measurements; and a blowout detection unit configured to receive the raw data stream from the acoustic sensor. The blowout detection unit may include a processor and a machine-readable storage medium on which is stored instructions that cause the processor to execute a procedure related to a detection of a blowout precursor. The procedure may include an ensemble approach in which the detection of the blowout precursor depends upon a outcomes generated respectively by separate detection analytics.

Abstract: Embodiments of the invention relate to a system for producing collisions or near-collision situations between a collision body, in particular a vehicle, and a test object. The system comprises a fastening plate having a coupling mechanism, by means of which coupling mechanism the test object can be detachably coupled to the fastening plate, a drive belt which is fastened to the fastening plate, and a drive unit having a drive body for driving the drive belt. The drive unit, the drive belt, and the fastening plate can be placed directly on a floor in such a way that the drive body moves the drive belt and the fastening plate along the floor.

Abstract: A tire contact state estimation method includes: an information acquisition step of acquiring information of the tire; a correlation strength calculation step of calculating a first correlation strength between the rotational velocity and the braking and driving force, and also calculating a second correlation strength between the slip angle and the generated lateral force; a change detection step of detecting whether the first correlation strength has increased or decreased by a first threshold or more with respect to a predetermined first reference value, and also detecting whether the second correlation strength has increased or decreased by a second threshold or more with respect to a predetermined second reference value; and an estimation step of estimating at least two of the following: a condition of a road surface in contact with the tire, a tire internal pressure state, and a tire abrasion state.

Abstract: Methods and systems for improving the uniformity of a tire are provided. More specifically, one or more characteristics of a composite uniformity parameter can be determined from uniformity summary data (e.g. uniformity vectors) associated with a plurality of harmonics of the composite uniformity parameter. For instance, a peak to peak range of a composite uniformity parameter and/or a distribution of amplitudes of a composite uniformity parameter for a set of tires can be determined from uniformity vectors associated with selected harmonics of the composite uniformity parameter. According to example aspects of the present disclosure, the one or more characteristics of the composite uniformity parameter can be determined using multivariate normal distributions (e.g. bivariate normal distributions) of the uniformity summary data. Once identified, the one or more characteristics can be used to modify tire manufacture to improve tire uniformity.

Abstract: An automatic calibration method of an angle sensor for an automatic drive control system of a farm machine includes the following steps. S1: fixing a steering wheel of the farm machine to make front wheels of a vehicle kept at a fixed angle. S2: collecting a plurality of pieces of current position information of the farm machine, and processing the plurality of pieces of current position information to obtain an average value. S3: establishing a two-wheel farm machine kinematics model based on a center of a rear axle. S4: performing a radius calculation to obtain a set of angle correspondences. S5: rotating the farm machine by a preset angle at a constant speed with the rear axle of the farm machine as a center, and performing S1 through S4. S6: after performing S5 for several times, performing an angle value fitting calculation to obtain a calibration coefficient.

Abstract: The present invention discloses a inspection device for detecting a defect of a metal object, where the inspection device includes a main base, at least one main magnetic module, and a main inspection module. The at least one main magnetic module is installed on the main base, for attaching the main base onto the metal object under an action of a magnetic force. The main inspection module is installed on the main base, to detect at least one type of defect of the metal object. The present invention further discloses a wheel defect inspection method and a wheel defect inspection device. The metal object defect inspection device may implement automatic detection of a defect on a whole circumference of a wheel.

Abstract: An amount of wear of a railroad vehicle wheel flange online while traveling in a curved section is directly measured. A laser rangefinder 3 is installed on an outer track side in a rounded curve section of a railroad track. When a railroad vehicle travels through the rounded curve section, the laser rangefinder 3 measures a distance to a front rim surface of a wheel on an outer track side of a wheelset in a forward direction of travel of a bogie forming a vehicle. The amount of wheel flange wear is obtained by comparing this measured distance with a previous measurement of the measured distance. It is then possible to control the amount of wheel flange wear when traveling in a curved section, thus making it possible to quickly find wheels having flange wear that has exceeded a control range and ensure safety during travel of the railroad vehicle.

Abstract: A sampler for taking samples from a molten metal bath, particularly a molten steel bath, includes a sample chamber assembly having a cover plate and a housing. The housing has an immersion end provided with an inflow conduit and including a sample cavity including a distribution zone, an analysis zone, and a ventilation zone. The sample cavity is dimensioned into four contiguous segments each of which has a respective length and depth. The four contiguous segments satisfy the formula: (L1/D1)+(L2/D2)+(L3/D3)+(L4/D4)>25.

Abstract: A microextraction capsule holding a sol-gel coating or monolithic bed with an affinity for one or more target analytes infused in a porous tube that can be placed in a sample matrix containing the target analytes. The microextraction capsule can include a magnetic wire to allow the capsule to be spun in the presence of the matrix to increase the rate of absorption of the target analytes. The microextraction capsule can be formed by infusing a sol solution into the porous tube and forming a metal oxide or hybrid inorganic-organic sorbent comprising gel from the sol within the pores of the porous tube or by forming a gel by sol-gel condensation with water followed by grinding the gel to a particulate gel and infusing the particles into a porous tube.

Abstract: A method of processing at least one biological sample capable of containing at least one target microorganism, the method being carried out within a container and including: (a) performing at least one step of homogenizing the biological sample, during which contents of the container are displaced from a level n, corresponding to a level of the contents at rest, to a homogenization level nh, distinct from the level n, and vice versa; and (b) generating a displacement of the contents to a level n+1, which is different from levels n and nh, such that the contents come into contact with at least one culture, at least one analysis device, or a combination thereof, positioned in a chamber of the container, between level n+1 inclusive and level nh exclusive, wherein step b) takes place before, after or during all or part of the homogenization step a).

Abstract: An article that can be used for biomaterial capture comprises (a) a porous substrate; and (b) borne on the porous substrate, a polymer comprising interpolymerized units of at least one monomer consisting of (1) at least one monovalent ethylenically unsaturated group, (2) at least one monovalent ligand functional group selected from acidic groups, basic groups other than guanidino, and salts thereof, and (3) a multivalent spacer group that is directly bonded to the monovalent groups so as to link at least one ethylenically unsaturated group and at least one ligand functional group by a chain of at least six catenated atoms.

Abstract: An evaluation method of a plastic material includes: a first shearing process of performing simple shearing deformation with respect to a first plastic sheet; a second shearing process of performing simple shearing deformation with respect to a second plastic sheet; a first partial stress-strain curve data obtaining process of obtaining first partial stress-strain curve data; a second partial stress-strain curve data obtaining process of obtaining second partial stress-strain curve data; and a synthesized stress-strain curve data obtaining process of obtaining synthesized stress-strain curve data based on the first partial stress-strain curve data and the second partial stress-strain curve data.

Abstract: An optomechanical reference includes a basal member; a flexure that includes: a floating link; a first flexural member; and a second flexural member such that: the floating link is moveably disposed; a first stator; a second stator; a first cavity including: a first primary mirror; a first secondary mirror; a first optical coupler in optical communication with the first secondary mirror; and a first cavity length; and a second cavity including: a second primary mirror; a second secondary mirror; a second optical coupler; and a second cavity length.

Abstract: A rotary shock testing machine including: a base; a shaft rotatable relative to the base; a test disc for holding one or more specimens to be tested, the test disc being rotatable with the shaft; an actuator for applying a rotation to the shaft and test disc; and a brake for applying a braking force to the test disc to subject the one or more specimens to a rotary shock.

Abstract: Provided are a method and device for improving a response speed in a measurement of viscosity of a fluid and obtaining a continuous smooth measurement graph. A viscometer includes a machine part that generates a shear rate in a sample, a machine drive, a shear rate changing means that outputs a target shear rate of the machine part, and a displacement detection sensor that measures displacement of the machine part, and performs feedback control to control a driving force of the machine drive so that an output value of the displacement detection sensor corresponds to the target shear rate and measures a viscosity of a sample, wherein a feedback gain is simply set for each measurement according to an optimum design or target shear rate.

Abstract: An elongated apparatus that measures soil water tension is disclosed, having a hydrogel chamber for receiving a plurality of macro-sized hydrogel particles through its open side and a sealed inner wall, the hydrogel held in the hydrogel chamber by a durable, hydrophilic, and porous window secured to the open side of the hydrogel chamber. The window, when the apparatus is received in soil, transmits moisture between the soil and the hydrogel chamber, causing variable pressure within the hydrogel chamber that can be converted to a measurement of soil water tension on the opposite side of the window. This pressure produces various mechanical effects, measurable by various types of sensors within the elongated probe. A method for measuring soil water tension at multiple depths within a soil profile is also disclosed.

Abstract: A dynamic light scattering apparatus includes a source configured for irradiating a sample with primary electromagnetic radiation, a detector configured for detecting secondary electromagnetic radiation generated by scattering the primary electromagnetic radiation at the sample, a refraction index determination unit including a movable optical element and configured to determine information indicative of a refraction index of the sample based on measurements of the secondary electromagnetic radiation for a plurality of different positions of the movable optical element, and a particle size determining unit configured to determine information indicative of particle size of particles in the sample by analyzing the detected secondary electromagnetic radiation and taking into account the refraction index determined by the refraction index determining unit.

Abstract: A particulate matter detection element 1 includes paired detection electrodes 12 for detecting particulate matter contained in exhaust gas discharged from an internal combustion engine, and insulating member 13 made of electrically insulating material. In the particulate matter detection element 1, at least part of the paired detection electrodes 12 is exposed from the insulating member 13 in the direction perpendicular to the lamination direction of the paired detection electrodes 1, to cause part of the particulate matter to deposit thereon. The surface roughness of at least the insulating member disposed between the paired detection electrodes is between 0.8 ?m and 8.0 ?m in 10-point average roughness.

Abstract: The present invention relates to a cell assessment method characterized in including an acquisition step of acquiring an optical path length image of a small cell clump, an extraction step of extracting a cell nucleus region within the acquired optical path length image, a comparison step of comparing an optical path length of an inside and an optical path length of an outside of the extracted cell nucleus region, and an assessment step of assessing whether or not a cell is a stem cell based on the comparison results.

Abstract: An airborne, gas, or liquid particle sensor with multiple particle sensor blocks in a single particle counter. Each sensor would sample a portion of the incoming airstream, or possibly a separate airstream. The various counters could be used separately or in concert.

Abstract: Fouling of or damage to an electromagnetic radiation-transparent window can preclude one from obtaining satisfactory images with an image acquisition unit, such as a camera. Certain types of environments may be particularly prone toward promoting fouling or damage, and manual cleaning or repair of an electromagnetic radiation-transparent window may be difficult in some circumstances. These issues may be particularly prevalent when imaging drill cuttings and other solids obtained from a wellbore due to the complex sampling environment in which these solids are often disposed.

Abstract: This invention relates to a device for calibrating circular or linear dichroism spectrometers, or other photoelastic modulator (PEM) based devices or instruments. In preferred embodiments, the present invention features a device for calibrating circular dichroism or linear dichroism spectrometers comprising at least one waveplate (Q) providing (n±¼) waves of retardation at a defined set of wavelengths, and at least one isotropic plate (P). The invention also features methods for using the device, for example, for calibrating circular dichroism spectrometers or linear dichroism spectrometers.

Abstract: The present disclosure describes devices and techniques for testing. In particular, the disclosure describes testing systems that are portable and easy to operate. The testing system can include a measurement apparatus that can be used to measure spectral characteristics of a sample and can be in a portable, hand-held form-factor. The testing system also includes a computing device, such as a mobile phone, a laptop, or a personal computer that can communicate with the measurement device over a wired or a wireless communication link and also can have form-factors that are portable. The computing device can run applications or programs that receive spectral data of the sample from the measurement apparatus and can process the received spectral data to determine various properties of the sample. As both the measurement apparatus and the computing device are portable, the measurements can be easily made at site where the fluid is produced.