376 results about "Voltage sensing" patented technology

The invention discloses an intelligent charging and discharging strategy optimization method for a ship battery, and particularly relates to the technical field of battery management. Propulsion power data, auxiliary equipment power data and environment disturbance parameters generated in the ship operation process are collected, a high-frequency time sequence working condition input sequence is built, a load nonlinear evolution model is built through a multi-scale dynamic modeling algorithm, and a disturbance perception prediction sequence is generated; a heterogeneous state characteristic matrix is constructed by combining historical charging and discharging state records of a target battery and current sensing data, voltage sensing data and temperature sensing data, and then the state of charge and the state of health of the battery are evaluated; generating a multi-dimensional strategy candidate set by constructing an energy scheduling constraint map according to the evaluation results of the state of charge and the state of health of the battery; and selecting an optimal strategy path from the multi-dimensional strategy candidate set, outputting a target charging and discharging control instruction, and realizing comprehensive optimization control of dynamic sensing, state driving and strategy self-adaption of the ship battery.

The invention belongs to the field of data processing, and particularly relates to a high-voltage direct-current electric field intensity measuring method and a related device. In the device, an optical fiber direct-current electric field sensor at least comprises a signal processing unit, an optical fiber voltage sensing head, a fixed electrode and a rotating electrode. The method comprises the following steps: deploying a measuring device in a space to be measured; the rotating electrode is controlled to rotate at a constant speed, so that the center distance between the fixed electrode and the rotating electrode is periodically changed along with the rotating track; collecting an alternating current signal voltage generated by an alternating potential difference between the fixed electrode and the rotating electrode in a constant-speed rotating process through an optical fiber voltage sensing head; and performing numerical processing on the alternating current signal voltage through a signal processing unit to obtain a measured value of the high-voltage direct current electric field intensity, and optimizing the measured value in combination with a physical compensation model and a data driving compensation model. The method can realize the measurement of the high-voltage direct-current space electric field intensity, improve the measurement accuracy and expand the measurement range.

A battery diagnosis apparatus for diagnosis of a cell group including a plurality of battery cells connected in series, includes a voltage sensing circuit configured to periodically generate a voltage signal indicating a cell voltage of each battery cell, and a control circuit configured to generate time series data indicating a change in cell voltage of each battery cell over time based on the voltage signal. The control circuit is configured to (i) determine a first average cell voltage and a second average cell voltage of each battery cell based on the time series data, wherein the first average cell voltage is a short term moving average, and the second average cell voltage is a long term moving average, and (ii) detect an abnormal voltage of each battery cell based on a difference between the first average cell voltage and the second average cell voltage.

The invention discloses an insulator-based voltage and current integrated intelligent sensing device and method.The insulator-based voltage and current integrated intelligent sensing device comprises a voltage sensing unit, a current sensing unit and an insulation fixing box, firstly, line voltage and current are detected on the basis that the insulation performance and mechanical strength of an insulator are kept sufficient; then, the voltage sensing unit realizes uniformization of an induced electric field, determination of a transfer function and relative minimization of partial discharge, and the voltage sensing unit is implanted into the insulator, so that the insulation performance of the voltage sensing unit is good; and finally, the current sensing unit improves the magnetic field measurement sensitivity by utilizing the magnetic gathering capability of the open type magnetic ring air gap and the optimization design of the magnetic ring structure parameters, and enhances the magnetic interference resistance by utilizing the optimization design of the magnetic ring structure parameters and the magnetic ring series.

The invention discloses a high-integration intelligent ignition head device and an automobile safety communication power supply system thereof. The device comprises an input unit, a power management module, a communication module, a communication judgment module, an MCU, a voltage sensing module, a current sensing module, an ignition control module, an ignition element and a substrate, and an environment self-adaption unit, a dual-mode wireless energy supply unit and an optical fiber diagnosis channel can be additionally arranged. The system adopts the device, communicates with a central control unit through a redundant optical fiber bus and a double-wire bus, and further comprises the central control unit, a dynamic topology reconstruction unit and a pre-ignition energy distribution unit. Through digital signal control, multi-dimensional sensing module integration and a double-wire bus topological structure, ignition threshold multi-stage protection, state real-time monitoring and feedback, multi-ignition-head parallel independent control and miniaturized function integration are achieved, and the reliability, the intelligent degree and the driving efficiency of an automobile safety system are improved.

An apparatus includes a resonant converter controller having a converter voltage sensing terminal, a reference voltage terminal, a converter current sensing terminal, first and second converter capacitor terminals, and first and second control outputs. The resonant converter controller is configured to: receive a current sensing signal at the converter current sensing terminal; generate a first signal based on the current sensing signal; generate a second signal representing a difference between a first voltage at the converter voltage sensing terminal and a reference voltage at the reference voltage terminal; and generate first and second switching signals at, respectively, the first and second control outputs responsive to the first signal, the second signal, and a capacitor voltage between the first and second converter capacitor terminals to regulate the first voltage based on the reference voltage.

A broadband-capable current / voltage sensing-based VSWR resilient true power / impedance detector and method are disclosed that can be used for single-ended interfaces of individual phased array elements of a phased array antenna, e.g., large-scaled integrated phased-arrays. The true power and impedance detectors, as Built-in-Self-Test (BiST or BIST) circuitries, may each employ an in situ load invariant power and impedance sensor to provide true measurements of power and impedance that can be used to detect and / or monitor for VSWR variations and / or variations in the antenna driving impedance due to antenna element coupling and / or other effects. The measured power and impedance output(s) of each BIST circuitry can then be used to adjust or drive respective passive or active tuning circuitry, e.g., in the power amplifier or other front-end circuitries of the phased array antenna, for performance recovery (or optimization) of a respective array element.

Disclosed is a system for zero voltage switching in a power converter with a first half-bridge and a second half-bridge. The first half-bridge has a first set of transistors and output inductor. The second half-bridge has a second set of transistors and auxiliary inductor. A current sensing means measures, at switching cycle scale, average and maximum current values of output inductor and average, minimum and maximum current values of auxiliary inductor. A voltage sensing means measures input and output voltages of first and second half-bridge. A controller is configured to compute dead times of pulse width modulation control signal of second half-bridge, generate pulse width modulation control signal of second half-bridge and to adapt dead times of first half-bridge.

A lamp driver has a transformer, a primary side circuit and a secondary side circuit. The primary side circuit comprises a half bridge circuit and a sensor circuit for measuring a conduction time or switching frequency of one of the transistors of the half bridge circuit. An estimate is provided of the output voltage from the measured conduction time.

A method for reducing DC bus voltage fluctuations caused by a film capacitor in a permanent magnet synchronous motor, including: sampling, using a voltage sensing circuit, a total DC bus voltage (Udc) from an inverter in real-time; passing the total DC bus voltage (Udc) through a low-pass filter to extract a DC component (Udc0) of the total DC bus voltage; obtaining an AC component (Te=P0·ψf×iq - - - (1)) of the total DC bus voltage (Udc) by subtracting the DC component (Udc0) from the total DC bus voltage (Udc): ũdc=Udc−Udc0; obtaining a reference DC bus voltage (u*dc) by subtracting the AC component (Te=P0·ψf×iq - - - (1)) from the DC component (Udc0): u*dc=Udc0−Te=P0·ψf×iq- - - (1); and passing the reference DC bus voltage (u*dc) to a space vector pulse width modulation (SVPWM) module, thereby performing calculations that generate precise switching signals for the inverter.

Aspects of the disclosure are directed to voltage sensing for safety-critical applications. In accordance with one aspect, the disclosure includes a multi-phase ring oscillator (RO) configured to operate in a first voltage domain; a frequency counter coupled to the multi-phase RO, the frequency counter configured to accumulate a plurality of phase cycles from the multi-phase RO over a time duration to generate a digital count word; an alarm processor coupled to the frequency counter, the alarm processor configured to receive an alarm state signal from the frequency counter; and a heartbeat detector coupled to the multi-phase RO, the heartbeat detector configured to operate in a second voltage domain and configured to detect a periodic recurrence of a heartbeat pulse to determine an integrity of the sensor function as a whole and alarm state signal in particular.

The invention relates to the technical field of overvoltage monitoring, in particular to a wide-frequency-domain overvoltage online monitoring system and method for electric power high-voltage equipment. Comprising an electric field sensor array, an acquisition unit, a calculation unit and an output unit, the electric field sensor array comprises a plurality of sensors which are radially distributed on the same circumferential plane and have different measuring ranges and sensitivities, and sensors which are axially distributed; the electric field sensor comprises a sensing unit and a fiber bragg grating temperature measuring unit; the fiber bragg grating temperature measuring unit is suitable for measuring the temperature of the sensing unit; the acquisition unit is suitable for synchronously acquiring the emergent light intensity of the sensing unit and the temperature data of the fiber grating temperature measurement unit. The multi-range sensors distributed in the radial direction achieve wide-range and high-sensitivity voltage sensing through differential design, the intrusion direction of overvoltage can be determined through cooperation of the axial sensors and the radial sensors, and the problem that the range and sensitivity of a single electric field sensor are mutually restricted is solved.

The application provides a pressure signal fitting method and device, the method comprises: applying pressure to each sensing point in a pressure sensor, measuring the relationship between pressure and resistance of each sensing point, and integrating to obtain the pressure-resistance relationship; the pressure-resistance relationship is corrected through a numerical filtering algorithm, and the corrected pressure-resistance relationship is fitted to obtain an optimized pressure-resistance relationship; the switching of the voltage sensing circuit sensing points is carried out through an integrated analog electronic switch, the voltage of the stressed multiple array sensing points is measured; the resistance of the multiple array sensing points is calculated according to the measured voltage combined with the acquisition circuit; and the pressure of the multiple array sensing points is calculated through the optimized pressure-resistance relationship; based on the area of the stress area and the non-stress area of the multiple array sensing points, the actual stress of the multiple array sensing points is calculated through the relationship between force and pressure.

The invention discloses a trolley device for electricity testing and grounding of a remote control type switch cabinet and a control method of the trolley device. The trolley device comprises an electric trolley and a remote control operation assembly arranged on the electric trolley. The electric trolley is provided with a grounding execution assembly and a voltage sensing assembly with dual redundancy configuration, the voltage sensing assembly is used for realizing electricity testing dual confirmation, the grounding execution assembly is used for executing grounding operation, and the remote control operation assembly can control and execute electricity testing and grounding actions; the remote control operation assembly comprises a controller and a remote controller which are in wireless communication, the remote controller remotely operates the controller to execute electric trolley electricity testing and grounding actions and receives and displays state information of the electric trolley, and the controller judges whether grounding operation is carried out or not through comprehensive electricity testing double confirmation. Electricity testing and grounding operation of the switch cabinet are completed through remote control operation, the live-line state of the bus of the switch cabinet can be accurately judged through double-confirmation electricity testing, the maintenance efficiency of the switch cabinet of the transformer substation is improved, and the safety of operation and maintenance personnel is guaranteed.

A power conversion system includes: a rectifier for rectifying an AC input voltage to generate a rectified voltage; a power stage circuit coupled to the rectifier; a sensing circuit coupled between a multiplex pin and either the AC input voltage or the rectified voltage and configured to generate a multiplexed sensing signal; and a control circuit for performing operations for over-temperature protection and brown-out protection during respective over-temperature and brown-out protection periods based on the status of the multiplexed sensing signal. The control circuit includes: the multiplex pin; and a current source and a bias switch, serially coupled to the multiplex pin. During the over-temperature protection period, the bias switch is conductive to provide a bias current to the sensing circuit to generate a temperature sensing signal. Outside the over-temperature protection period, the bias switch is non-conductive to stop providing the bias current, thereby generating an input voltage sensing signal.

The invention discloses an all-digital PVT sensor based on a ring oscillator, and relates to the field of PVT sensors, the all-digital PVT sensor comprises a process sensing circuit, a voltage sensing circuit and a temperature sensing circuit, the process sensing circuit comprises a process detection ring oscillator, the voltage sensing circuit comprises a voltage detection ring oscillator, and the temperature sensing circuit comprises a temperature detection ring oscillator. The temperature sensing circuit comprises a temperature sensitive ring oscillator; under the control of an enable signal, the process detection ring oscillator, the voltage detection ring oscillator and the temperature-sensitive ring oscillator start oscillation, and the process corner, the temperature and the power supply voltage of the detected chip are determined based on the oscillation frequencies of the process detection ring oscillator, the voltage detection ring oscillator and the temperature-sensitive ring oscillator. The PVT sensor is completely realized based on a digital circuit, an additional analog module does not need to be introduced, the area overhead is greatly reduced, and the PVT sensor has remarkable area advantage and structural simplicity while the high-precision detection capability is maintained.

A power circuit includes a power transistor coupled between input and output nodes and receiving a control signal. A current sensing current senses a power current provided by the power transistor to the output node and generates a sense voltage. A voltage sensing circuit senses a drain-to-source voltage of the power transistor and generates a VDS sense current. A safe operating area (SOA) shaping circuit has a gain set by an adjustable resistance that is dynamically adjusted based upon the VDS sense current, the SOA shaping circuit applying the gain to the sense voltage to produce an adjusted sense voltage. A timing circuit generates an intermediate voltage by comparing the adjusted sense voltage and a first reference. An output comparator asserts a flag in response to the intermediate voltage becoming at least equal to a second reference. The control signal is modified in response to assertion of the flag.

The present disclosure relates to the technical field of display, and provides an ambient light detection circuit and method, and a display device. The ambient light detection circuit is used for ambient light detection of a display panel. The detection circuit comprises: a plurality of sensing modules, which are used for collecting ambient light and outputting current sensing signals based on the ambient light; a plurality of current conversion modules, which are arranged correspondingly to the plurality of sensing modules, and are used for converting the current sensing signals output by the sensing modules connected thereto into voltage sensing signals; a plurality of storage modules, which are arranged correspondingly to the plurality of current conversion modules, and are used for storing the voltage sensing signals output by the current conversion modules connected thereto in response to a sampling control signal; and a control module, which is connected to the storage modules respectively, and is used for synchronously outputting the sampling control signal to each of the storage modules.

According to certain embodiments, a switch cover comprises a panel with a hole, wherein the hole is configured to receive a rocker, wherein the rocker selectively controls an electrical connection between a first line and a second line; a voltage sensor disposed on the panel and configured to induce a current from an electrical field generated by electrical power transmitted over the electrical connection between the first line and the second line; and an antenna disposed on the panel and configured to transmit a radio signal in response to induction of the current in the voltage sensor.

A thermostat with voltage and current sensing capability is coupled directly to an HVAC unit and provides low latency failure detection and control using an on-board CPU. The thermostat can be configured to detect failure modes using current and voltage sensing and to make autonomous decisions to control the HVAC in response to such measurements.

A system (12) for a vehicle, an assembly (10), and a method for detecting a connection state of a switching device (62) of a charging circuit (56) are provided. The system (12) comprises at least one stator coil (30) of an electric machine (18), an inverter (16), and a charging circuit (56). The inverter (16) is configured to be coupled to a battery (14) of the vehicle. The charging circuit (56) is configured to be coupled to a charging device external to the vehicle. The charging circuit (56) is further configured for adapting a charging program of the battery (14) of the vehicle. The charging circuit (56) comprises at least a capacitor (64) and the switching device (62). The switching device (62) is arranged between the capacitor (64) and the stator coil (30). A single voltage sensing element (66) is arranged between the switching device (62) of the charging circuit (56) and a star point (60) of the electric machine (18). A control circuit (36) is configured to detect the connection state of the switching device (62) of the charging circuit (56) based on a voltage magnitude measured by the voltage sensing element (66).

Embodiments relate to a display device and driving method thereof. A display device includes a display panel including a pixel arranged thereon, a gate driving circuit configured to supply a scan signal to the pixel, a power control unit configured to output a gate driving voltage to the gate driving circuit, a sensing unit configured to sense an input electric signal and output sensing data, and a timing controller configured to control operations of the gate driving circuit.

A current sensing device is provided, including: a laminate having a plurality of insulating layers laminated therein; a current sensing element provided in an inner layer of the laminate; a current wire configured to flow current to the current sensing element, the current wire being provided above an interlayer insulating layer with respect to the current sensing element; a plurality of current vias configured to connect the current sensing element and the current wire in such a manner as to penetrate the interlayer insulating layer; and a voltage sensing via configured to obtain a voltage drop in the current sensing element, the voltage sensing via being electrically connected to the current sensing element.

A detector circuit includes a parametric resonator circuit comprising a first varactor and a second varactor disposed in a loop. The parametric resonator has a conductor disposed between the first varactor and the second varactor. The detector circuit further includes a voltage sensing resonator circuit aligned on the parametric resonator circuit so that at least a first portion of the resonator circuit is disposed in the loop and a second portion is disposed outside the loop in an axial view.

A switch may be added to an AC charge path of an EV charge system. A controller may operate the switch and other switches. The controller may direct a traction battery to pre-charge a capacitor of an AC filter in the AC charge path before connecting the AC charge path between the traction battery and a power source. In embodiments including voltage sensing, the controller may track the power source voltage and command a voltage of the AC charge path to follow the power source voltage before connecting the AC charge path between the traction battery and the power source. After pre-charging, the controller may track the power source voltage and command the AC charge path connect between the traction battery and the power source at a zero-crossing of the voltage of power source.

Circuit embodiments for a switched-capacitor power converter, and / or methods of operation of such a converter, that robustly deal with various startup scenarios, are efficient and low cost, and have quick startup times to steady-state converter operation. Embodiments prevent full charge pump capacitor discharge during shutdown of a converter and / or rebalance charge pump capacitors during a startup period before switching operation by discharging and / or precharging the charge pump capacitors. Embodiments may include a dedicated rebalancer circuit that includes a voltage sensing circuit coupled to an output voltage of a converter, and a balance circuit configured to charge or discharge each charge pump capacitor towards a target steady-state multiple of the output voltage of the converter as a function of an output signal from the voltage sensing circuit indicative of the output voltage. Embodiments prevent or limit current in-rush to a converter during a startup state.

A display device includes a pixel that has a first transistor having a drain electrode that is connected to a first power voltage node and a source electrode that is connected to a second power voltage node, a second transistor connected between a data line and a gate electrode of the first transistor, and a third transistor connected between a sensing line and the source electrode of the first transistor, a data driver applying a bias voltage to the data line during a sensing period, a sensing driver sensing an electrical characteristic of the pixel through the sensing line during the sensing period, and a controller for adjusting the bias voltage according to the first power voltage according to input image data.

The invention relates to a voltage sensing device with a micro-electro-mechanical element. The voltage sensing device comprises a micro-electro-mechanical sensing element, a transimpedance amplifying circuit and a differentiating circuit, the micro-electro-mechanical sensing element is used for sensing an input voltage to generate a sensing current. The transimpedance amplification circuit is connected to the output end of the micro-electro-mechanical sensing element to receive the sensing current and convert the sensing current into an amplification voltage. The differentiating circuit is connected to the transimpedance amplifying circuit and used for receiving the amplified voltage and differentiating the amplified voltage to generate a differential signal, and the differential signal indicates whether the input voltage has a sudden change state or not and indicates the time point when the input voltage suddenly changes.

The application discloses a four-electrode voltammetry oil product acid-base value detection circuit design method, and belongs to the technical field of electrochemical detection. The method comprises the following steps: designing a four-electrode system, a controllable current source, a voltage sensing unit and a regulation circuit to form a complete oil product acid-base value detection circuit. The four-electrode system comprises an auxiliary electrode, a working electrode and two reference electrodes; the controllable current source outputs an excitation current and injects the excitation current into a detection solution through the auxiliary electrode and the working electrode; the voltage sensing unit collects a response potential difference of the detection solution through the two reference electrodes; the regulation circuit adjusts the output excitation current of the controllable current source in a current scanning or voltage scanning mode and synchronously collects the response potential difference, constructs a voltammetry curve between the excitation current and the response potential difference, and calculates a reaction peak area parameter and a corresponding acid-base value of the measured oil product. The application can overcome the problem caused by the working electrode potential drift of the traditional three-electrode type oil product acid-base value detection circuit, and thus stable and accurate detection results are obtained.

The invention discloses a composite multifunctional electromagnetic induction experimental instrument, which belongs to the technical field of electromagnetic induction and comprises a magnetic field generation part, a magnetic field detection part and a control part, the self-made induction coil part comprises induction coil groups with different turns and a telescopic arm; the data acquisition part comprises intelligent mobile phone phyphox software, a digital voltmeter, a DIS voltage sensing module and a homemade diode voltage comparator, a group of Helmholtz coils are homemade, and a voltmeter sensor in the intelligent mobile phone phyphox software is utilized, so that the research on the magnetic field distribution rule of the Helmholtz coils is realized; a Helmholtz coil is used for building a magnetic field, and a self-made induction coil group, a digital voltmeter or an oscilloscope and the like are combined to realize research on an electromagnetic induction phenomenon: a self-made diode voltage comparator is used for quantitatively describing a magnetic field distribution rule in the Helmholtz coil.