8results about "Through mechanical resonance" patented technology

A device for qualifying a plurality of specimens comprising a wire and at least one crimped element, and a corresponding method. A device for qualifying a plurality of specimens (14), each comprising a wire (18) and at least one element (20) crimped onto the wire, the device comprising: - a test area (28) forming locations (24) respectively intended to receive the specimens to be tested, - a programmable current source (30), - an electrical circuit (32) for electrically connecting the locations to the current source, the electrical circuit comprising contactors (C1 to C21) adapted to be open or closed and to define, in combination with each other, a plurality of electrical circuit configurations, in particular of a first type, in which: - only one of the locations is selectively electrically connected to the current source, - the others are disconnected from the current source.and - only one of the specimens is intended to be subjected to a current. Figure for the abbreviation: Figure 2,

A method (and corresponding apparatus) of analyzing the behavior of an electrochemical double layer (EDL) by replacing a classic capacitor in an astable multivibrator circuit with an electrochemical cell. By pushing the EDL into resonance, the induced charging and discharging of the double layer results in a square waveform output that has a characteristic frequency audible to the human ear. Variations in the electrolyte concentration and identity yield distinct frequencies. The method provides sensory insight into EDL rearrangement and behavior with an apparatus that is simple and robust. The apparatus allows the analysis of time-dependent EDL rearrangements occurring upon the application of a voltage. The apparatus provides insight, via an audible signal perceptible to the human ear, into the fundamental electrochemical principles governing chemical transformations.

A method for measuring a voltage using a microelectromechanical system, MEMS, (100) comprising a sample mass (110) which is supported above a substrate by means of mechanical spring elements (120) in such a way that it can be moved relative to the substrate along a vibration direction (x), trimming electrodes (130) which are suitable for generating an electrostatic force on the sample mass (110) when a voltage is applied to them, the electrostatic force counteracting a mechanical spring force generated by the spring elements (120) when the sample mass (110) is deflected along the vibration direction (x), drive electrodes (140) which are suitable for setting the sample mass (110) in motion along the vibration direction (x), and readout electrodes (150) which are suitable for measuring a vibration frequency of the vibration of the sample mass (110) generated in such a way comprises: applying a voltage to be measured to the trimming electrodes (130); measuring the magnitude of the voltage to be measured from the measured vibration frequency of the sample mass (110); and detecting changes in the voltage to be measured on the basis of the change in the measured vibration frequency.

A flow valve current sensor (30) comprising: - a first magnetic core (34) and a first excitation winding (45), a second magnetic core (35) and a second excitation winding (46); - excitation components (37) arranged to produce a first excitation voltage (Ve1) and apply it to the first excitation winding, and to produce a second excitation voltage (Ve2) and apply it to the second excitation winding, the first and second excitation voltages being identical but in opposite phase; - measurement components (38) arranged to produce an output voltage (Vs) representative of the target current from a first measurement voltage (Vm1) and a second measurement voltage (Vm2). Figure 4

A flow valve current sensor (30) comprising: - a first magnetic core (34) and a first excitation winding (45), a second magnetic core (35) and a second excitation winding (46); - excitation components (37) arranged to produce a first excitation voltage (Ve1) and apply it to the first excitation winding, and to produce a second excitation voltage (Ve2) and apply it to the second excitation winding, the first and second excitation voltages being identical but in opposite phase; - measurement components (38) arranged to produce an output voltage (Vs) representative of the target current from a first measurement voltage (Vm1) and a second measurement voltage (Vm2). Figure 4

A method (100) for measuring voltage using a microelectromechanical system (MEMS) comprises a sample mass (110) supported above a substrate by a mechanical spring element (120) so as to be movable relative to the substrate along a vibration direction (x), a trimming electrode (130) adapted to generate an electrostatic force on the sample mass (110) when a voltage is applied thereto, the electrostatic force counteracting a mechanical spring force generated by the spring element (120) when the sample mass (110) is deflected along the vibration direction (x), a drive electrode (140) adapted to move the sample mass (110) along the vibration direction (x), and a readout electrode (150) adapted to measure the frequency of vibration of the sample mass (110) thus generated: applying a voltage to be measured to the trimming electrode (130), determining the magnitude of the voltage to be measured from the measured vibration frequency of the sample mass (110), and detecting a change in the voltage to be measured based on a change in the measured vibration frequency.

A method for measuring a voltage using a microelectromechanical system, MEMS, (100) comprising a sample mass (110) which is supported above a substrate by means of mechanical spring elements (120) in such a way that it can be moved relative to the substrate along a vibration direction (x), trimming electrodes (130) which are suitable for generating an electrostatic force on the sample mass (110) when a voltage is applied to them, the electrostatic force counteracting a mechanical spring force generated by the spring elements (120) when the sample mass (110) is deflected along the vibration direction (x), drive electrodes (140) which are suitable for setting the sample mass (110) in motion along the vibration direction (x), and readout electrodes (150) which are suitable for measuring a vibration frequency of the vibration of the sample mass (110) generated in such a way comprises: applying a voltage to be measured to the trimming electrodes (130); measuring the magnitude of the voltage to be measured from the measured vibration frequency of the sample mass (110); and detecting changes in the voltage to be measured on the basis of the change in the measured vibration frequency.

Method and circuit arrangement for determining characteristic parameters of an oscillator (OSC) comprising the steps: comparing (S1) an output signal (x) of the oscillator (OSC) with a threshold value (x thr) to determine a comparison result; generating (S2) a feedback signal (FB) which, depending on the determined comparison result, is subjected to one of two different feedback levels (ACC+; ACC-); delaying (S3) the generated feedback signal (FB) with a delay time (tD) to establish a continuous periodic oscillation of the feedback oscillator; and determining (S4) the characteristic parameters of the oscillator (OSC) based on samples within a self-oscillation period of a triggered self-oscillation of the oscillator (OSC).