Abstract: A capacitive liquid level sensor (1). The sensor comprises a sensor body in the form a tongue with a freely depending portion (3) extending to a distal tip (6) at its lowermost end. A set of spaced capacitive electrodes (7) extend along the tongue towards the distal tip. In use, when the distal tip (6) of the tongue is immersed in a body of liquid, the capacitance between the electrodes (7) changes depending on the depth of the body of liquid. The width of the tongue increases in the downward direction at least for part of the bottom half of the freely depending part of the tongue.

Abstract: A method for checking or testing the profile of the path of contact of involute helical cylindrical gears is disclosed. The crossed helical gear transmits motion through the profile of the path of contact, and checking or testing the profile of the path of contact can reflect the transmission quality and working stability of the gear and the actual motion condition. In the gear hobbing, the grinding, the shaving and other generating machining, the movement of tools and gears is achieved based on the profile of the path of contact, and controlling the profile of the path of contact has unique advantages in controlling the quality of gear processing.

Abstract: The present disclosure discloses a bipolar transistor type MEMS pressure sensor and a preparation method thereof. The bipolar transistor type MEMS pressure sensor includes a thin film, a cantilever beam and a bipolar transistor. The bipolar transistor includes a base region, a collector region and an emitter region. The base region is configured to sense deformation of the thin film through a change in resistance value. For the bipolar transistor type MEMS pressure sensor of the disclosure, sensitivity of the sensor can be effectively improved without changing the performance indicators such as the measurement range and nonlinearity. Meanwhile, the bipolar transistor is used as a pressure-sensitive element, so that temperature drift of the sensor can be effectively inhibited.

Abstract: A test sample of a vulcanized rubber material is placed under a preset placement condition in a fixing frame in a test tank having a predetermined ozone concentration, and detection data is acquired by detecting, over time, with a laser sensor disposed facing a surface of the test sample that has been placed in the test tank, a distance from the laser sensor to the surface of the test sample; and determining a change in a surface state of the test sample between a plurality of points in time by analyzing, with a computation device, the detection data that has been acquired. Such evaluation method and evaluation system for evaluating ozone deterioration of a vulcanized rubber material can accurately determine a change over time in ozone deterioration while reducing working man-hours.

Abstract: A method of assessing a membrane, including calculating fluid dynamic characteristics of at least one of a membrane and a material to be passed through the membrane, where the material comprises particles; obtaining characteristic of at least one force acting on the particles of the material to be passed through the membrane due to the interaction between the particles and the membrane, the at least one force being an intermolecular force; combining the calculated fluid dynamic characteristic and the obtained characteristics to assess the flow of the material through the membrane; and optimizing at least one characteristics of the membrane in relation to the material. The membrane includes a plurality of rows and a plurality of teardrop structures arranged in the plurality of rows. The teardrop structures in each row are arranged at substantially the same angle with respect to an anticipated direction of flow through the membrane.

Abstract: A tracer particle spreading device for a boundary layer flow visualization experiment based on a flat plate includes a tracer particle generator, a smoke storage box, and a wall-surface particle distribution box. Fume and oil are pressurized by a micro pump and flows into a heating pipe to be heated and vaporized, and then is ejected from a nozzle to form tracer particles. The tracer particles enter the smoke storage box via a smoke guiding tube. An axial flow fan is mounted on a wall surface of the smoke storage box. The tracer particles enter a cavity of the wall-surface particle distribution box via the smoke guiding tube, and the tracer particles are rectified by a rectifying plate and ejected from a spreading slit. An outlet of the spreading slit is at an angle of 15° with respect to an experiment flat plate.

Abstract: A test fixture for testing firearms or ammunition includes a base, a block, and a firing pin. The base has a lateral channel defining a front upright and a rear upright. The front upright is configured to support a firearm barrel. The block is rotatable within the lateral channel between an open position and a closed position. The open position provides user access to the firearm barrel. The firing pin is housed in the block. The closed position of the block aligns the firing pin with the firearm barrel.

Abstract: A system for determining a location of a feature of an object, the system including a first marker including a first area and a surface having two parallel edges and a third edge disposed perpendicularly to the two parallel edges, the two parallel edges are disposed about a first central axis of the two parallel edges; and a sensor configured to provide a distance from the sensor to a portion of the first marker, wherein the sensor is adapted to obtain distances between the sensor and the first marker and an environment surrounding the first marker to form a first map representing the distances corresponding to locations from which the distances are obtained using the sensor and the location of the feature of the object is determined based on at least one corner corresponding to an intersection formed of the third edge and one of the two parallel edges.

Abstract: Provided is a computer-implemented method for preforming negative pressure testing, also known as an inflow test. In the method, a non-transitive computer readable medium storing a pressure analysis program for analysis of pressure data is provided that when executed, causes an information processing apparatus connected to an image display screen, to receive at least one of a plurality of inputs from a user, receive a plurality of pressure values from a sensor filter at least a subset of the plurality of pressure values, select one of a plurality of negative pressure testing models; run the filtered subset of pressure values through the selected negative pressure testing model; and store the values generated by the negative pressure testing model.

Abstract: An item comprising a body which comprises a fiber composite structure incorporating at least one sensor for sensing a parameter and/or at least one antenna for wireless communication, and circuitry, wherein the fiber composite structure is formed of a plurality of structural layers or laminations which are formed from a sheet which is impregnated with a graphene-containing resin.

Abstract: An infrared emitter with a glass lid for emitting infrared radiation comprises a package enclosing a cavity, wherein a first part is transparent for infrared radiation and a second part comprises a glass material and a heating structure configured for emitting the infrared radiation, wherein the heating structure is arranged in the cavity between the first part and the second part of the package.

Abstract: A resonance shear measurement device (1) of the present invention includes an upper unit (10) having a piezoelectric element (15), an upper disk substrate (16), and a spring (17), and a lower unit (11) having a lower disk substrate (14), in which a sample insertion portion (21) is formed between a lower surface of the upper disk substrate (16) and an upper surface of the lower disk substrate (14), the piezoelectric element (15) and the upper disk substrate (16) are vibratably connected to a fixed apparatus 30 via the spring (17), a strain gauge (19) is attached to the spring (17), and by applying an AC voltage to the piezoelectric element (15) while changing a frequency of the AC voltage, a response voltage at the resonance from the strain gauge (19) due to a vibration of the upper unit (10) is measured.

Abstract: Disclosed is a pressure transducer including a body made of a material having a first coefficient of thermal expansion, a fluidic inlet and a fluidic cavity enclosed by the body in fluidic communication with the fluidic inlet. The pressure transducer further includes a strain gauge including a resistive element in operable contact with the body. At least a portion of the resistive element made of a material having a second coefficient of thermal expansion that is different from the first coefficient of thermal expansion of the body. Disclosed further is a pressure transducer including a filler body located in a fluidic cavity of the pressure transducer configured to reduce adiabatic thermal effects on a transducer body. Disclosed are systems and methods incorporating the pressure transducers described herein.

Abstract: The present invention relates to microfluidic or millifluidic chips (1) comprising at least one pressure sensing unit (4) able to measure a fluid flow pressure. The present invention also relates to a method for a direct and contact-free measuring of a local pressure of a fluid circulating in a microfluidic circuit, using a microfluidic or millifluidic chips (1) according to the invention.

Abstract: A device for measuring the accretion of ice on a studied surface. The device has two arms, a first arm and a second arm, the second arm forming an enclosure for housing an image acquisition system disposed to acquire, through an orifice, images of a part of the studied surface located on the first arm. The device thus makes it possible to dissociate the support of the image acquisition system from that of the studied surface on which ice accumulates. Consequently, it is possible to place the second arm in the direction of the flow of the stream of air flowing along the aircraft while the first arm passes through the stream.

Abstract: A pressure measurement system includes a pressure pod with two chambers separated by a diaphragm such that a deformation/movement of the diaphragm is indicative of a difference between the pressures of the two chambers. Such deformation/movement is detected by a device that has no physical contact with the diaphragm, for example, by an optical detector that detects a change in the shape of the diaphragm or a movement of a protrusion on the diaphragm.

Abstract: An inspection method for a speed variator including a first gear and a second gear includes obtaining a first position of the first gear based on a contact between a first gear tooth of the first gear and a third gear tooth of the second gear, driving the first gear to rotate in a first direction to bring a second gear tooth of the first gear into contact with the third gear tooth, obtaining a second position of the first gear based on a contact between the second gear tooth and the third gear tooth, and determining a condition of the speed variator based on the first position and the second position. Also, an inspection device is provided.

Abstract: A device for controlling the pressure of a tire of an aircraft wheel provided with a rim. The device includes a shell defining an open-ended housing; a system for controlling the pressure of a tire; and an annular band having a tensile strength of between 400 and 1500N. The system is received in the housing of the shell, and the annular band is positioned on a bearing face of the shell opposite the open-ended housing and against transverse retaining means. The device can be positioned around the rim to press the shell against the rim and close off the open-ended housing.

Abstract: The present invention provides a tire-wear detection sensor for a vehicle having a telematics system and tires including a temperature sensor, a pressure sensor, and an RF antenna in electronic communication with the sensors, and capable of transmitting the temperature signal and the pressure signal to the telematics system.

Abstract: Disclosed is an anti-buckling jig of a fracture toughness test. The anti-buckling jig includes: a first jig unit provided in a form of surrounding one side surface of a specimen; a second jig unit provided in a form of surrounding the other side surface of the specimen; and a screw provided to allow the first jig unit and the second jig unit to be coupled to each other. During the fracture toughness test of the specimen, the first jig unit and the second jig unit simultaneously support both sides of the specimen, so that the specimen is cracked in a single direction.