A stress detector for detecting an in-situ stress profile of an electrode has a liquid cell, a holder configured to attach to one end of a sample electrode so that the sample electrode is cantilevered in the liquid cell, a piezo sensor comprising a piezo material in the liquid cell and having a movable end configured to contact the sample electrode and a fixed end fixedly engaged within the liquid cell and a measurement sensor in contact with the piezo sensor.

A method of inspection for a group of a same type of capacitors includes: a step of applying a DC bias voltage equal to or lower than the rated value of the group to a capacitor; and a vibration response voltage generating step of inputting an electric signal whose frequency continuously changes with time to a capacitor, causing mechanical vibration in the capacitor, generating a vibration response voltage from the capacitor, and outputting superposition of the DC bias voltage and the vibration response voltage as reaction voltage.

A sachet includes a first wing made of a flexible material and having a first perimeter region circumscribing a first central region; a second wing made of the flexible material; a hinge connecting the first and second wings along a common boundary; an adhesive material applied to the perimeter region on the first wing; a first electrically conducting electrode formed on the first wing within the central region of the perimeter region; a second electrically conducting electrode formed on the second wing in a region that is opposed to and in alignment with the first contact area on the first wing; an array of contact pads formed on at least one of the first and second wings; first and second conducting traces electrically connecting first and second groups of one or more contact pads among the array of contact pads to the first and second electrodes, respectively.

A backup power system in a vehicle that provides temporary power to one or more electronic control units (ECUs) upon failure of a main power supply. The backup power system includes an energy reservoir that stores electric charge. A charging circuit is electrically connected to the energy reservoir to generate charge for the energy reservoir during normal operation of the vehicle. A discharging circuit for supplying backup power is electrically connected between the energy reservoir and the ECUs. A diagnostic circuit is electrically connected to the energy reservoir and a microcontroller. The microcontroller is configured to monitor a slew rate of the energy reservoir as an amount of stored electric charge in the energy reservoir changes, determine if the slew rate is within a predetermined range, and when the slew rate is not within the predetermined range, generate a first error signal.

A method for real-time monitoring of an operational state of a capacitive sensor capable of being mounted on a rotating machine, and connected to an electronic measuring module via a high frequency transmission line. The method includes generating, within the electronic module, a signal for compensating in capacitance parasitic effects from the transmission line and the sensor, generating, within the electronic module, a signal for compensating in conductance parasitic effects from the transmission line and the sensor, extracting a signal representative of the capacitance compensation and of a signal representative of the conductance compensation so as to determine an operating point of the sensor and analyzing the operating point so as to check if it is located in a predetermined area.

A pin-diverging device for releasing stresses and a capacitor detection system are disclosed. The pin-diverging device includes a pin-diverging module and a heat-generating module adjacent to the pin-diverging module. A capacitor includes two conductive pins respectively passing through two through holes of a seat board, and the two conductive pins of the capacitor are slidably mated with the pin-diverging module so as to diverge the two conductive pins of the capacitor. The seat board is held by the two diverged conductive pins so as to prevent the seat board from being separated from the capacitor. The heat-generating module provides a predetermined heat source to the capacitor so as to release stresses in the capacitor.

A method for determining a capacitance of a capacitor includes measuring an electrical current supplied from or to the capacitor over time, integrating the electrical current to determine a charge amount supplied from or to the capacitor over time, determining a state of charge, SoC, of the capacitor over time, determining a total charge capacity of the capacitor based on a linear relationship between changes in the charge amount and changes in the SoC, and determining the capacitance based on the calculated total charge capacity.

A test instrument for use with a sample having a plurality of electrically conducting contact pads, the instrument including: a controllable, variable force linear actuator; a probe assembly operated by the linear actuator, the probe assembly having a probe head at one end with a surface for contacting the sample; a movable contactor assembly including a plurality of contacts for electrically contacting the plurality of contact pads on the sample; a housing on which the linear actuator and contactor assembly are mounted, the housing having an identified area for holding the sample during testing; a position sensor assembly for measuring changes in the position of the probe; and a sensor for measuring a force applied to the sample by the probe head.

A backup power system in a vehicle that provides temporary power to one or more electronic control units (ECUs) upon failure of a main power supply. The backup power system includes an energy reservoir that stores electric charge. A charging circuit is electrically connected to the energy reservoir to generate charge for the energy reservoir during normal operation of the vehicle. A discharging circuit for supplying backup power is electrically connected between the energy reservoir and the ECUs. A diagnostic circuit is electrically connected to the energy reservoir and a microcontroller. The microcontroller is configured to monitor a slew rate of the energy reservoir as an amount of stored electric charge in the energy reservoir changes, determine if the slew rate is within a predetermined range, and when the slew rate is not within the predetermined range, generate a first error signal.

A system includes a capacitor unit having one or more capacitors within a body of the capacitor unit, wherein the capacitor unit comprises at least two bushings. The system includes a monitoring system having a first antenna. The monitoring system is configured to couple to the at least two bushings to form a resonant frequency (LC) circuit having a capacitance based at least in part on an effective capacitance of the capacitor unit. The monitoring system is configured to send a first signal to a radio frequency (RF) reader at a frequency based at least in part on the effective capacitance of the capacitor unit via the first antenna. The first signal is associated with health of the capacitor unit.