Abstract: Provided is a method of monitoring the structural integrity of a supporting structure of a wind turbine, which method includes the steps of determining a fore-aft tower oscillation frequency; determining a side-to-side tower oscillation frequency; computing a working structural indicator value from the fore-aft tower oscillation frequency and the side-to-side tower oscillation frequency; comparing the working structural indicator value to a reference working structural indicator value; and issuing an alarm if the difference between the working structural indicator value and the reference structural indicator value exceeds a predefined threshold. Also provided is a system for monitoring the structural integrity of a supporting structure of a wind turbine, a wind turbine, and a computer program product for carrying out the steps of the inventive method.

Abstract: An inspection device for an ultrasound flow meter is provided that has an inspection chamber having a fluid at a flow velocity of zero and having a first installation station for a first ultrasonic transducer and having a second installation station for a second ultrasonic transducer of the ultrasound flow meter so that the ultrasonic transducers are aligned toward one another in the installed state and span an ultrasound measurement path through the inspection chamber on the connection line. The invention further relates to a method of inspecting and/or calibrating an ultrasound flow meter.

Abstract: A cleaning indicator is disclosed for determining the effectiveness of a washing and disinfecting process related to the healthcare, medical device and pharmaceutical fields. The cleaning indicator includes a base, a soil coupon and a cover. The base has a recessed area for receiving the soil coupon and the cover is attached to the base by clip members. The cover has a transparent window for viewing the soil coupon which transparent window optionally may have a small hole therein. The base includes grip members for attaching the cleaning indicator to a tray in a washer-disinfector. The cleaning indicator is placed in the washer-disinfector for medical instruments or the like for determining the efficacy of the wash cycle of the washer-disinfector.

Abstract: Embodiments of this application disclose a fault point position determining method and apparatus and a photovoltaic system, to correctly and efficiently determine a fault point position when a disconnection fault occurs in a photovoltaic system. The method is applied to a photovoltaic system, the photovoltaic system includes at least one inverter and at least one photovoltaic unit, each photovoltaic unit includes at least one photovoltaic module and one photovoltaic module controller, and the method includes: sending, by an inverter, a first test signal to the at least one photovoltaic unit; obtaining, by the inverter, first test signal characteristic information fed back by the at least one photovoltaic unit; and performing, by the inverter, absolute value or relative value sorting on the at least one piece of first test signal characteristic information, and determining a fault point in the photovoltaic system based on a sorting result.

Abstract: A testing device for an airbag module includes a support structure to which an airbag module containing an airbag can be fastened, the support structure forming a passage which can be penetrated by the airbag, at least one lid movably fastened to the support structure by fastening means between a closing position in which the lid closes the passage and an open position in which the passage is opened, and a closure device that closes the lid in the closing position by applying a closing force to the lid, wherein the lid comprises at least one first force sensor measuring the opening force applied to the lid by the airbag when moved out of the closed position by the airbag.

Abstract: A work machine can include a frame; a spray system couple to the frame and including a spray bar having a plurality of nozzles; a pressure sensor to detect a pressure of a liquid within the spray bar; and a controller to determine whether the detected pressure of the liquid within the spray bar has exceeded a pre-determined pressure threshold.

Abstract: An object of the present invention is to provide a collision performance evaluation test method and apparatus that achieve a part collision test that satisfactorily reproduces the state of an actual automobile body collision, allow the test to be performed in a high-speed region, and increase the economic rationality of the test. A motion control mechanism formed of a translation control mechanism or a rotation control mechanism is provided in at least one of a support jig that supports one end portion of an automobile body part and a support jig that supports the other end portion of the automobile body part. The motion control mechanism includes a fixed member fixed to a motion restriction member in the support jig and a movable member so connected to the fixed member as to be movable and fixed to the one end portion or the other end portion of the automobile body part.

Abstract: An inertial sensor, includes: a substrate; a fixing portion that is provided on the substrate; a first movable body that faces the substrate and that is displaceable with a first support beam as a first rotation axis; the first support beam that is arranged in a first direction and that couples the first movable body and the fixing portion; a second movable body that is displaceable due to deformation of a second support beam; the second support beam that is arranged in a second direction intersecting the first direction and that couples the first movable body and the second movable body; and a protrusion that is provided on the substrate or the second movable body, overlaps the second movable body in plan view from a third direction and that protrudes toward the second movable body or the substrate.

Abstract: A system, a method and a built-in phase noise measurement apparatus are introduced. The built-in phase noise measurement apparatus includes a first DLL and a TDC, in which the first DLL circuit controls a delay of a first signal to generate a second signal based on a control code, tune the control code until a phase of the second signal is aligned to a phase of a reference clock signal, and record a value of the control code when the phase of the second signal is aligned to the phase of the reference clock signal. The DLL circuit controls the delay of the first signal based on the value of the control code after the phase of the second signal is aligned to the phase of the reference clock signal. The TDC determines the phase noise of the first signal based on the reference clock signal and the second signal.

Abstract: A fluid level sensing system comprises a sensor float assembly, a sensor control module comprising a sensor processor, and a sensor cable. An accelerometer arranged within the float chamber in a fixed orientation relative to a float axis. The accelerometer is capable of determining movement in at least first and second reference axes. The sensor cable is operatively connected between the float processor and the sensor processor. Movement of the float enclosure relative to the reference point is limited. The accelerometer generates and transfers to the float processor first and second sets of data representative of movement along the first and second reference axes. The float processor generates and transfers to the sensor processor pitch data associated with the float enclosure based on the first and second sets of data. The sensor processor generates a status signal and/or a control signal based on the pitch data.

Abstract: A method and a calorimeter system for reducing error in a measured sample heat flow rate due to interpan heat exchange are described. The method includes sensing a heat flow rate to or from a sample container placed on a sample calorimeter unit in a single sample differential scanning calorimeter sensor and sensing a reference heat flow rate to or from a reference container placed on a reference calorimeter unit of the single sample differential scanning calorimeter sensor. The temperature of the sample container and the temperature of the reference container are also sensed. An interpan heat exchange between the sample container and the reference container is determined. A sample heat flow rate having reduced error is determined based on the sensed heat flow rate from the sample container and the determined interpan heat exchange rate.

Abstract: A method for calibrating a sensor system, including: providing at least one first sensor unit and one second sensor unit, providing first correction data for the first sensor unit on the basis of measuring signals of the first sensor unit, providing second correction data for the first sensor unit, in the case of an activated second sensor unit, on the basis of measuring signals of the first sensor unit and on the basis of measuring signals of the second sensor unit, determining a first quality parameter for the first correction data and a second quality parameter for the second correction data, determining present correction data for measuring signals of the first sensor unit based on the correction data having the highest of the two determined quality parameters, and calibrating the first sensor unit by correcting first measuring signals on the basis of the present correction data.

Abstract: The disclosure discloses a detection coil structure based on interlayer coupling and a metal object detection system. The detection coil structure includes: a top sub-detection coil and a bottom sub-detection coil, wherein the top and bottom sub-detection coils are the same in structure and similar or same in size and are orthogonal to each other, and both the outer boundaries and geometric symmetry centers of the detection coils are completely coincident; the top sub-detection coil includes a first terminal, a second terminal, a third terminal and a fourth terminal, and the bottom sub-detection coil includes a fifth terminal, a sixth terminal, a seventh terminal and an eighth terminal; and the first terminal is connected to the second terminal, the seventh terminal is connected to the eighth terminal, and the third terminal and the fourth terminal are respectively connected to the fifth terminal and the sixth terminal.

Abstract: The invention relates to a medical device (12) comprising an electrical measurement circuit (16), in which are connected at least two variable-impedance sensors (22), the impedance of which varies according to a detected physical quantity, an electrical power source (18) for supplying power to the electrical measurement circuit (16), an antenna (18) for emitting an electromagnetic field according to the impedance of the electrical measurement circuit (16), each of the sensors (22) being associated with a switch (24) for interrupting the current supply of the sensor (22) in said measurement circuit (16), the medical device (12) additionally comprising a system (26) for controlling the switches (24) in order to successively control the opening or the closing of the switches (24), according to determined configurations. The medical device (12) may in particular be applied to the human body or implanted within the human body.

Abstract: The measuring jig for the rotary machine is a measuring jig for a rotary machine including a casing that extending about an axis, a rotor that is disposed in the casing and extends in an axial direction about the axis, and a plurality of bearings that are disposed at intervals in the axial direction and supports the rotor in the casing. The measuring jig includes a plurality of casing fixing portions that are respectively attachable to and detachable from bearing holding portions to which the bearings are attached in the casing; a main member that extends in the axial direction so as to connect the plurality of casing fixing portions to each other; an arm that extends from the main member in an orthogonal direction orthogonal to the axial direction; and a reference surface that is disposed at a distance from a measurement target part of the casing.

Abstract: A method and system for conducting a non-contact survey of an overhead crane runway system using a survey apparatus that is alternately located in the crane bay or on a crane bridge girder. Disclosed more particularly are a method and system for testing an overhead crane runway beam 3D alignment or an overhead crane runway rail 3D alignment using a 3D laser scanner.

Abstract: A method for calibrating an electronic sensor for peening intensity. A range of desired intensity levels is chosen and that range may contain a single value or multiple values. The parameters for a blast stream are set that correspond to a particular intensity level. Test strips are peened in the blast stream and then the arcs of the peened strips are measured to determine the intensity level of the blast stream. Subsequently, a sensor is placed in the blast stream set at particular intensity levels and the signal generated at each intensity level is recorded. A roto-flap peening device can also be set at particular intensity levels and then a sensor is subjected to the roto-flap peening device set at those levels. A chart may be developed that correlates peening intensity to the signal of the sensor so the sensor may be used in place of Almen strips.

Abstract: The method comprises the following steps providing a porous sample containing a first fluid; establishing a steady state profile of a second fluid content in the porous sample by applying a first mechanical load, to create a plurality of regions having different second fluid contents in the porous sample; measuring, in each of the plurality of regions, a local saturation in the first fluid or/and in the second fluid; measuring, in each of the plurality of regions, a corresponding local electrical resistivity and/or conductivity; and determining a value of the representative parameter based on the corresponding values of local saturation and of local electrical conductivity and/or resistivity in each of the plurality of regions.

Abstract: The present disclosure provides an electrostatic self-powered displacement grid sensor used for measuring the displacement of a component to be measured. The device structure includes a sliding chute and a sliding sheet, wherein the sliding chute is fixed to a fixed end, and the bottom of the inner side of the sliding chute is provided with a sensing array; the sliding sheet is fixedly connected with the component to be measured, and the lower end of the sliding plate is in contact with the bottom of the inner side of the sliding chute. When the sliding sheet slides over the sensing array; a corresponding electrical signal is produced, and the number of segments and the distance on sensing units on a single sensing array over which the sliding sheet slides can be obtained according to numbers and output current of sensing units in the sensing array indicated by the signal, and therefore the structural displacement is obtained.

Abstract: A method of measuring a flow rate of a fluid flowing along a path, the method comprising: transmitting successive pairs of periodic signals through the fluid, the respective signals of each pair being transmitted in opposite directions along, and from opposite ends of, the path; determining a difference in propagation times of each signal of each pair along the path; and determining a flow rate of fluid along the path based on the difference in propagation times of the signals of each pair along the path; wherein a phase of each signal is altered with respect to a phase of at least one other signal transmitted along the path.