Abstract: A device for determining the rotation frequency of at least one wheel of a vehicle provides a first measuring device for measuring an acceleration value of the at least one wheel, a second measuring means for measuring vibrations of the at least one wheel, and a processing unit configured to determine a first rotation frequency of the at least one wheel from the measured acceleration value of the at least one wheel, compare the determined first rotation frequency of the at least one wheel to a first threshold, define a frequency analysis interval from the determined first rotation frequency greater than the first threshold, process a frequency analysis of a signal indicative of vibrations of the at least one wheel for the frequencies inside the frequency analysis interval, and select a second rotation frequency in the frequency analysis interval having the higher amplitude.

Abstract: An apparatus may include a sense resistor comprising a plurality of parallel-coupled resistor elements, a plurality of positive voltage sense points, and a plurality of negative voltage sense points. A first passive combination network may be configured to combine the plurality of positive voltage sense points into a single positive sense terminal and a second passive combination network may be configured to combine the plurality of negative voltage sense points into a single negative sense terminal. The first passive combination network and the second passive combination network may be arranged such that a sense voltage is measurable between the single positive sense terminal and the single negative sense terminal and a dependence of the sense voltage on a variation in current density in the parallel-coupled resistor elements is minimized.

Abstract: A capacitive sensor includes a first electrode structure; a second electrode structure that is counter to the first electrode structure, wherein the second electrode structure is movable relative to the first electrode structure and is capacitively coupled to the first electrode structure to form a capacitor having a capacitance that changes with a change in a distance between the first electrode structure and second electrode structure; a signal generator configured to apply an electrical signal at an input or at an output of the capacitor to induce a voltage transient response at the output of capacitor; and a diagnostic circuit configured to detect a fault in the capacitive sensor by measuring a time constant of the first voltage transient response and detecting the fault based on the time constant and based on whether the first electrical signal is the pull-in signal or the non-pull-in signal.

Abstract: A spectroscopic analysis apparatus may include: a sample holder to retain a gem in analysis position; a first light source configured to emit a first primary beam at an excitation wavelength toward the analysis position to generate emission or diffusion of light; a second light source configured to emit a second primary beam comprising UV light toward the analysis position to impact on the first side; an optical focusing system to focus the light emitted or diffused by the first side in a secondary optical beam; a spectral dispersion device arranged to collect and spatially disperse the secondary optical beam; a first photodetector device arranged to collect the dispersed light and to output a distribution of spectral intensity as a function of emission wavelength; a second photodetector device to collect visible light transmitted through the gem; and a film of fluorescent material to UV light.

Abstract: An electrochemical electrode and method for making same that provides enhanced characteristics for use in biosensors, such as blood glucose sensors. The electrode comprises a substrate, a conductive layer deposited on the substrate, and a resistive material layer deposited on the conductive layer. The conductive layer comprises nickel and chromium, and the resistive material layer comprises carbon and a carbon-nitrogen species.

Abstract: A semiconductor device includes a control signal generation circuit configured to shift a test mode signal in response to a clock signal to generate a plurality of control signals, and a plurality of temperature sensing circuits each including a first resistor having a resistance that varies depending on temperature and configured to generate a temperature sensing signal based on the resistance in response to a corresponding control signal of the plurality of control signals.

Abstract: A magnetic field sensor arrangement for determining a signal magnetic flux in a manner which is substantially strayfield immune, comprises: a signal magnetic field source; a first and second magnetic flux concentrator forming an air gap between exterior faces of the magnetic flux concentrators; the flux concentrators being configured for guiding a signal magnetic flux to and across the air gap in a gap direction; a magnetic field sensor arranged inside the air gap, and configured for measuring a first and second signal in the gap direction and perpendicular to the gap direction; and for reducing or eliminating an magnetic disturbance field based on the first and second signal. An angle sensor arrangement. A torque sensor. A method of measuring a signal flux, an angle, a torque in a substantially strayfield immune manner.

Abstract: The disclosure relates to a method and system for evaluating the stability of HVDC receiving end system and storage medium, which relates to the technical field of high voltage direct current transmission. The method includes: collecting voltage at a generator port, current at the generator port and rotational speed of the generator after eliminating fault; determining a corresponding relationship between the generator dynamic energy and the time according to the voltage at the generator port, the current at the generator port and the rotational speed of the generator; determining the attenuation intensity of the generator dynamic energy according to the corresponding relationship between the generator dynamic energy and the time; determining stability of the HVDC receiving end system according to the attenuation intensity of the generator dynamic energy.

Abstract: A motor leakage current detector and/or a heat compensating circuit, devices using same and related methods are disclosed herein. Included are a uniquely wired current transformer to allow for polarity agnostic leakage current detection, a leakage current detector using same and having a notifier to alert a user. In other forms, an accessory power cord and power strip are disclosed capable of detecting early motor failure conditions. In still other forms, other machinery failure early warning systems are disclosed as are numerous motor operated devices using same including without limitation pumps.

Abstract: A condition-based monitoring system receives a plurality of measurements from sensors measuring mechanical and electrical aspects of a prime mover and a synchronous machine. The condition-based monitoring system determines a correlation between the mechanical measurements and electrical measurements to estimate parameters of the model. The condition-based monitoring system also updates the model as sensors obtain additional measurements during operation of the prime mover.

Abstract: A computer-implemented method of analyzing an electrical wiring harness assembly comprises receiving, via a processing element, a test result associated with the electrical wiring harness assembly; determining, via the processing element, a probable error type based on the test result; retrieving from a memory element, via the processing element, a plurality of natural language terms associated with the probable error type, each of the plurality of natural language terms having a corresponding phrase order value; and reporting, via a user interface, each of the plurality of natural language terms in an order according to the phrase order values.

Abstract: The subject matter of this specification can be embodied in, among other things, a torque motor monitoring system that includes a first observer module configured to receive a first collection of operational information about a torque motor when the torque motor is operating normally, and determine a duty offset ratio value based on the first collection of operational information, a second observer module configured to receive a second collection of operational information about a torque motor, determine a MOSFET gate duty ratio value based on the second collection of operational information and the duty offset ratio value, and determine a motor current value, and a fault detection module configured to identify a fault in the torque motor based on the MOSFET gate duty ratio value, the motor current value, and a predetermined fault determination threshold value.

Abstract: The invention relates to a method of assigning addresses to bus participants connected to a data bus, in which the bus participants are electrically and in particular also mechanically coupled to a respective base plate, with the base plates each comprising an electrical test element; the base plates are electrically connected along a row to adjacent base plates in each case, with the base plates forming a test circuit in which the test elements are preferably connected in series; a central unit is connected to the test circuit; a test current is impressed into the test circuit; at least one bus participant, in particular a bus participant without a bus address, makes a change to the test circuit; the change of the test circuit is measured by means of the central unit; and based on the change of the test circuit, a position of the bus participant making the change or of the bus participant without a bus address is determined and a bus address is assigned to the bus participant making the change or to the b

Abstract: A force sensor includes a first structure, four strain generation parts, and a second structure connected to the first structure with the strain generation parts interposed therebetween. The strain generation part includes a first connection part connected to the first structure, a first branch part, which is a beam-like part branching into two from the first connection part toward the second structure and extending in directions separating from each other, a second branch part, which is a beam-like part connected to the first branch part with bent parts interposed therebetween and extending in directions approaching each other, and a second connection part where branched parts of the second branch part join and connects to the second structure. The strain generation parts are formed so that the strain generation parts become line-symmetric with respect to the first and second axes when projected in a direction perpendicular to the reference plane.

Abstract: A method for ascertaining the state of charge of an electrical energy storage unit is described. In one example, the method includes ascertaining a voltage gradient at least based on a detected first voltage value of the electrical energy storage unit; comparing the ascertained voltage gradient with a predefined voltage gradient threshold value; and ascertaining the state of charge of the electrical energy storage unit depending on the comparison. A corresponding computer program, a corresponding machine-readable storage medium, a corresponding apparatus and a corresponding electrical energy storage system are also described.

Abstract: A method includes connecting an input voltage bus of a switched capacitor converter to a power source through a load switch, in a first short circuit testing step, determining whether the load switch or a second switch is shorted by comparing a voltage on the input voltage bus with a first predetermined voltage reference, after passing the first short circuit testing step, in a second short circuit testing step, determining whether a first switch or a fourth switch is shorted by comparing a voltage on the common node of the third switch and the fourth switch with a second predetermined voltage reference, and after passing the second short circuit testing step, in a third short circuit testing step, determining whether a third switch is shorted by comparing the voltage on the common node of the third switch and the fourth switch with a third predetermined voltage reference.

Abstract: A monitoring apparatus may include a charge plate, a detection sensor, a voltage generator and a controller. The detection sensor may be arranged adjacent to the charge plate to detect a voltage of the charge plate. The voltage generator may be configured to selectively apply a voltage to the charge plate. The controller may be configured to receive and store voltage values and their transmission time transmitted from the detection sensor in generating ions from the ionizer during a monitoring time. The controller may be configured to check a discharge performance of the ionizer based on the voltage values and their respective transmission times.

Abstract: The invention relates to a method and an apparatus for measuring particle concentrations in an aerosol. The apparatus comprises means (103) for driving flow (105) into apparatus (101), means (115) for electrically charging particles (109) to become electrically charged particles (123) by ions (113) produced by a charger, means (117) for removing free ions (113) which are not attached to the electrically charged particles (123), and means (119) for measuring electrical current carried by the electrically charged particles (123). The means (115) for charging the particles and the means (119) for measuring electrical current carried by the electrically charged particles (123) are dimensioned such that the means (119) for measuring electrical current carried by the electrically charged particles (123) only measures a part of a total current carried by the particles.

Abstract: A board-like connector, a dual-arm bridge of a board-like connector, and a wafer testing assembly are provided. The board-like connector includes a plurality of dual-arm bridges spaced apart from each other and an insulating layer. Each of the dual-arm bridges includes a carrier, a first cantilever, a second cantilever, a first abutting column, and a second abutting column, the latter two of which extend from the first and second cantilevers along two opposite directions. The first cantilever and the second cantilever extend from and are coplanar with the carrier. The insulating layer connects the carriers of the dual-arm bridges. The first abutting column and second abutting column of each of the dual-arm bridges respectively protrude from two opposite sides of the insulating layer, and are configured to abut against two boards, respectively.

Abstract: A semiconductor device is detachably mountable on a measurement target that includes sensors provided on a predetermined surface thereof. The semiconductor device includes a wiring board having a first surface, and a second surface opposite to the first surface, a semiconductor integrated circuit mounted on the first surface of the wiring board, measuring spring terminals mounted on the second surface of the wiring board, and projections provided on the second surface of the wiring board. Each of the measuring spring terminals makes contact with a terminal connecting to a corresponding one of the sensors to electrically connect the terminal and the corresponding one of the sensors, and each of the projections makes contact with the measurement target, in a state where the semiconductor device is mounted on the measurement target so that the predetermined surface of the measurement target opposes the second surface of the wiring board.