The present invention provides an information acquisition device and method for a pulsating voltage. The device uses a signal isolation circuit to receive a switch-controlling voltage of a motor driver and outputs a logic voltage. When a signal processing module receives the logic voltage from the signal isolation circuit, the signal processing module starts a counter and determines whether a rising or falling edge is present in the logic voltage. When determining that a first rising edge, a first falling edge, and a second rising edge are respectively present in the logic voltage, the signal processing module respectively stores a value of the counter as a first counter value, a second counter value, and a third counter value, and proceeds to calculate a voltage duty cycle of a motor-switching period based on the counter values. The present invention calculates the voltage duty cycle with improved accuracy.

A method for detecting a transient of a voltage damper of an electric vehicle, wherein an electric vehicle is provided, having a voltage network and a voltage damper connected to the voltage network, and a measurement device connected to the voltage network detects a transient produced by the voltage damper as a result of a loading, a method for designing a voltage component of a voltage network of an electric vehicle, and a device for loading a voltage damper of an electric vehicle.

A method includes providing, by a signal source circuit of a sensing circuit, a signal to a sensor via a conductor. When the sensor is exposed to a condition and is receiving the signal, an electrical characteristic of the sensor affects the signal. The signal includes at least one of: a direct current (DC) component and an oscillating component. When the sensing circuit is in a noisy environment, transient noise couples with the signal to produce a noisy signal. The method further includes comparing, by a transient circuit of the sensing circuit, the noisy signal with a representation of the noisy signal. When the noisy signal compares unfavorably with the representation of the noisy signal, supplying, by the transient circuit, a compensation signal to the conductor. A level of the compensation signal corresponds to a level at which the noisy signal compares unfavorably with the representation of the noisy signal.

A battery fire prevention and diagnosis system in accordance with the present invention comprises: an ultra-high frequency (UHF) sensor for measuring radiated electromagnetic wave installed inside or outside a battery system; a data acquiring unit for receiving the radiated electromagnetic wave signals measured from the UHF sensor; noise/defect cause database including on-site noise data related to a site in operation, and data on causes of defects; and a diagnosis unit for determining abnormality of the battery system, and a cause of a defect based on the radiated electromagnetic wave signal data acquired from the data acquiring unit, and the on-site noise data and the data on causes of defects in the noise/defect cause database.

A continuous time single drive capacitance-to-voltage (C2V) converter can be employed for single sensor, balanced single sensor, or differential sensor. First sensor and/or second sensor can be employed to sense a condition. A capacitive bridge can comprise a first capacitive digital-to-analog-converter (DAC) and second capacitive DAC as a differential node. First capacitive DAC can be associated with first sensor, and second capacitive DAC can be associated with a third capacitive DAC, in series with first sensor, if single sensor is implemented or the second sensor if balanced single sensor or differential sensor is implemented. Capacitive bridge can be connected to differential input of a capacitive feedback amplifier that can be a continuous time amplifier with no signal sampling and no noise folding. Capacitive feedback amplifier can comprise capacitively coupled input common mode feedback, which can remove noise from a sensor drive, and output common mode feedback.

A power monitoring system includes one or more power vector analyzers, and a power controller having one or more ports to receive transient event data comprising one or more power images and associated metadata for a transient event from the one or more power vector analyzers, and one or more processors configured to execute code to cause the one or more processors to convert the one or more power images from the one or more power vector analyzers and the associated metadata to one or more transient event vectors, and store the one or more transient event vectors in a vector database.

A signal processing method includes the steps of: receiving, by a first measurement circuit, an analog measurement signal from a device under test; digitizing, by the first measurement circuit, the analog measurement signal, thereby obtaining a digital measurement signal; removing, by a first noise reduction circuit, noise from the digital measurement signal, thereby obtaining a noise-corrected measurement signal; receiving, by a second measurement circuit, an analog reference signal, wherein the device under test generates the analog measurement signal based on the analog reference signal; digitizing, by the second measurement circuit, the analog reference signal, thereby obtaining a digital reference signal; removing, by a second noise reduction circuit, noise from the digital reference signal, thereby obtaining a noise-corrected reference signal; and determining, by a subtraction circuit, a digital difference signal based on the noise-corrected measurement signal and based on the noise-corrected reference signal. Further, a measurement system is described.

A short-circuit protection and localization circuit for power devices includes a first subcircuit for detecting dv/dt of a power device at turn on, a second subcircuit for short-circuit fault localization and soft turn-off of the power device, the second subcircuit including a totem-pole driver having an upper switch and a lower switch, and a third subcircuit for detecting short-circuit faults based on the output (V.sub.dip) of the first subcircuit and the output of an upper switch (V.sub.p) of the second subcircuit. The first subcircuit outputs a voltage (V.sub.dip) having a magnitude that is proportional to dv/dt of the power device. The third subcircuit outputs a signal (V.sub.sto) to the second subcircuit that causes the second subcircuit to softly turn-off the power device. The second subcircuit outputs a voltage of the upper switch (V.sub.p) and a fault-latching signal for short-circuit localization.

In an analog sensor that is connected to a converter that computes a measured value includes a sensor unit that measures a physical quantity and that converts the physical quantity into an electric signal that is used to compute the measured value, a memory that stores individual information that is information unique to the analog sensor, a first signal line that is used to input and output the individual information between the converter and the analog sensor, and a second signal line that is used to input and output the electric signal between the converter and the analog sensor.