42results about "Voltage measurements only" patented technology

A method for detecting a variation of input voltage. The method is generating an indication signal based on the input voltage, and comparing the input voltage with a first reference signal. The first reference signal is smaller than the indication signal, and if the input voltage is consistently smaller than the first reference signal during a first time duration from the moment when the input voltage is decreased to the first reference signal, the indication signal is decreased after the first time duration.

A power supply apparatus (100) comprises an inverter (110), voltage and current measuring devices (120a, 120b), a temperature sensor (130), and an operation circuit (140). The inverter (110) comprises change-over switches (SW1-SW6). The voltage and current measuring devices (120a, 120b) are configured to measure the voltage (V1) and the current (I1) on the change-over switches (SW1-SW6). The temperature sensor (130) is configured to measure an initial temperature (T[0]) in an initial state. The operation circuit (140) is coupled to the voltage and current measuring devices (120a, 120b) and the temperature sensor (130). The operation circuit (140) is configured to: execute a power model (142), and calculate a first transient power of the change-over switches (SW1-SW6) on the basis of the initial temperature (T[0]), the voltage (V1), and the current (I1); and execute a thermal model (144), and calculate a first transient ideal temperature of the change-over switches (SW1-SW6) on basis of the first transient power. The power supply apparatus (100) calculates, in real time, the transient temperature of channel interfaces of the change-over switches (SW1-SW6) by measuring the voltage (V1) and the current (I1) on the change-over switches (SW1-SW6) of the inverter (110). The present invention also relates to a temperature measurement method (500) for a power supply apparatus, and an electrical system (ES1).

To provide an abnormality detection device which can eliminate a pull-up resistor for voltage monitoring.SOLUTION: A pull-down resistor Rdu is composed of two voltage dividing resistors Rdu1 and Rdu2 which divide voltage between an inter-arm connection point Nu being a connection point between an upper arm element 61 and a lower arm element 64 and the ground, and connects the inter-arm connection point Nu and the ground. A determination unit 25 detects abnormality of at least the upper arm element 61 and the lower arm element 64 based on voltage of a voltage dividing point Du being the connection point of the two voltage dividing resistors Rdu1 and Rdu2. A power supply line Lp and the inter-arm connection point are not connected through a pull-up resistor. The determination unit 25 detects ON fastening abnormality and OFF fastening abnormality of the upper arm element 61 and the lower arm element 64 based on voltage of the voltage dividing point Du when leak current IL flows to the ground from an upper arm element drive circuit 31 through the pull-down resistor Rdu during operation of the upper arm element drive circuit 31.SELECTED DRAWING: Figure 2

Systems and methods are disclosed that monitor for supply noise from a power source using a voltage noise monitor (VNM). For instance, the VNM may include voltage sense circuitry comprising a controllable resistor that is controlled using threshold information. The resistance of the controllable resistor may be changed based on closing and / or opening one or more switches associated with step resistors using the bits from the threshold information. Furthermore, the VNM may include digital circuitry that comprises a hold finite state machine and a sticky hold counter. Using the digital circuitry, the VNM may be configured to hold a noise detection event for a plurality of clock cycles. In addition, the VNM may perform a calibration process based on setting two voltages for the power source to obtain two codes, and determining a transfer function based on the two voltages and the two codes.

By using a detector and voltmeter that do not require high-speed trigger operation, the present invention provides a phase characteristic measurement device that avoids the need for large-scale equipment used for phase measurement and enables relatively inexpensive phase measurement. [Solution] The system includes a first detector 11 that receives and detects three patterns of three-tone signals: a first three-tone signal obtained by combining three waves with angular frequencies ω1, ω2, and ω3 (where ω2-ω1=ω3-ω2=Δω), a second three-tone signal in which each tone has a phase offset, and a third three-tone signal having a different phase offset from the second three-tone signal; a BPF 12 that passes only the beat component of the signal output from the first detector, where the angular frequency difference Δω is between adjacent waves of the three-tone signals; a second detector 13 that detects the power of the beat component that has passed through the BPF 12; a voltmeter 14 that measures the voltage of the signal output from the second detector; and a phase calculator 15 that calculates the phase based on the measured voltage values ​​of the three patterns.

A direct-current energy-consuming apparatus, a method and a device for controlling a direct-current energy-consuming apparatus, and a storage medium are provided. The direct-current energy-consuming apparatus includes an energy-consuming resistor, a power module, an inductor and a control module. The inductor is arranged in a branch formed by the energy-consuming resistor and the power module connected in series. The control module is configured to switch off the power module when it is detected that a voltage between two ends of the direct-current energy-consuming apparatus is greater than a first voltage threshold, and switch on the power module, when it is detected that a voltage between two ends of the direct-current energy-consuming apparatus is less than a second voltage threshold, where the two voltage thresholds are determined based on a rated voltage of a corresponding direct-current power transmission system.

Provided is a circuit capable of accurately testing the number of coil turns even with a transformer having a high turns ratio. A transformer turns number testing circuit is able to connect primary-side coils and secondary-side coils of a reference transformer and a to-be-tested transformer in phase and in series, and includes: a reference-side resistance element included in a reference-side loop circuit formed between both ends of the secondary-side coil of the reference transformer; a to-be-tested-side resistance element included in a to-be-tested-side loop circuit formed between both ends of the secondary-side coil of the to-be-tested transformer; and a voltage detector provided in a common line of the reference-side loop circuit and the to-be-tested-side loop circuit, the common line connecting a midpoint between the secondary-side coils of the reference transformer and the to-be-tested transformer and a midpoint between the reference-side resistance element and the to-be-tested-side resistance element.

A measurement correction method and apparatus for a sensor, and a server power supply. The method is applied to a sensor comprising a shunt resistor and a differential amplifier, and comprises: performing compensation verification on the sensor in advance to obtain a compensation coefficient of the sensor (S1); obtaining a voltage signal output by the sensor (S2); and correcting the voltage signal according to an error value of the shunt resistor and the compensation coefficient to obtain a voltage correction signal for use in system optimization management (S3).

A safety mechanism circuit is provided. The safety mechanism circuit is disposed on a motherboard which includes a connector to be connected to a function circuit. In response to the function circuit being coupled to the connector, a detection circuit detects the voltage level of a contact terminal. In response to the voltage level of the contact terminal not being equal to a predetermined level, an operating circuit enters a safety mode to perform a safety operation. In response to the voltage level of the contact terminal being equal to the predetermined level, the operating circuit enters a normal mode to stop performing the safety operation.

A first detector that receives and detects 3-tone signals of three patterns of a first 3-tone signal obtained by combining three waves of angular frequencies ω1, ω2, and ω3 (here, ω2−ω1=ω3−ω2=Δω is established), a second 3-tone signal in which each tone has a phase offset, and a third 3-tone signal having a phase offset different from the phase offset of the second 3-tone signal, a BPF that allows only a beat component of an angular frequency difference Δω between adjacent waves of the 3-tone signals among signals output from the first detector to pass, a second detector that detects power of the beat component that has passed through the BPF, a voltmeter that measures a voltage of a signal output from the second detector, and a phase calculator that calculates a phase based on the measured voltage values of the three patterns.

A voltage measurement device with an expanded applicability is provided. The voltage measurement device includes a housing, a magnetic member, a first probe assembly, and a second probe assembly. By setting the magnetic member within the housing, the voltage measurement device can be magnetically attracted to any position on the busbar of the device to be measured. Additionally, the second probe assembly is movable, enabling voltage measurements on busbars of different thicknesses and devices of different sizes, expanding the applicability of the voltage measurement device.

The voltage sampling apparatus includes a differential circuit, a voltage division circuit, and a first calibration switch. A first output end of the differential circuit and an input end of a first voltage division branch of the voltage division circuit are connected to one end of the first calibration switch. A second output end of the differential circuit and an input end of a second voltage division branch of the voltage division circuit are connected to the other end of the first calibration switch. When the first calibration switch is in an on state, the differential circuit is configured to input a target signal to the first voltage division branch and the second voltage division branch that are connected in parallel.

A synchronous rectifier includes at least a first rectifier switch arranged to switch between an on state and an off state. The synchronous rectifier also includes a controller arranged to output a first control signal for the first rectifier switch. The first control signal has a first on trigger and a first off trigger. The controller is arranged to determine the timing of at least one of the first on trigger or the first off trigger based on a reference time point and a first timing offset.

A voltage measurement device (12) comprises a first measurement circuit (31), a second measurement circuit (32), a cell balance switch (360), and a correction circuit (33), the first measurement circuit (31) being connected to a plurality of first battery cells (211, 212), a bus bar (23), and a plurality of second battery cells (221, 222) via a plurality of first RC filters, the second measurement circuit (32) being connected to a plurality of first battery cells (211, 212), a bus bar (23), and a plurality of second battery cells (221, 222) via a plurality of second RC filters, the cell balance switch (360) being connected in parallel to the bus bar (23) via two second RC filters (511, 521) connected to the bus bar (23), and the correction circuit (33) using the value of the voltage between both ends of the bus bar (23) measured by the first measurement circuit (31) to correct the value measured by the second measurement circuit (32).

The application discloses a positive and negative voltage sampling circuit of a battery management system. The application comprises a P-pole switch array, an N-pole switch array, four sampling capacitors, a sampling resistor and two common-mode switches. The P-pole switch array and the N-pole switch array are of the same structure and each comprises 16 switches. The input end of the switch array is connected to the two ends of the sampling resistor, the output end is connected to the sampling capacitor, and the sampling capacitor is connected to one end of the common-mode switch, which is the output end of the sampling circuit, and the other end of the common-mode switch is connected to the back common-mode voltage. The application transfers the leakage current of the switch caused by the negative voltage to the non-main sampling path, without affecting the main sampling path. The application alternately uses the positive sampling process and the negative sampling process to realize the chopping sampling function, and reduces the influence of capacitor mismatch on the sampling accuracy. The application reduces the cost of the battery management system and improves the current sampling accuracy.

This invention discloses an apparatus for measuring oxygen saturation. The apparatus includes a circuit system configured to: measure a first diode voltage at a light-emitting diode (LED) when a first current is applied through the LED; measure a second diode voltage at the LED when a second current is applied through the LED; and measure a third diode voltage at the LED when a third current is applied through the LED. The circuit system is further configured to: determine a series resistance based on the first, second, and third diode voltages; and determine the intensity of a received photon signal corresponding to an output photon signal generated using the LED. The circuit system is further configured to determine the oxygen saturation level based on the intensity of the received photon signal and the series resistance.

The present application relates to the technical field of batteries, in particular to a battery open-circuit voltage regulation method and regulation apparatus, and a storage medium. The method comprises: first, acquiring the current open-circuit voltage of a target battery; and then determining whether the current open-circuit voltage of the target battery reaches a preset target open-circuit voltage, and if not, performing at least one voltage regulation process on the target battery. A single voltage regulation process comprises: determining a first voltage to be regulated corresponding to the target battery; on the basis of said first voltage and a charge-to-voltage ratio, determining a first charge amount to be regulated of the target battery; on the basis of said first charge amount of the target battery and a first current, determining a first duration of charging or discharging corresponding to the target battery; and, on the basis of the first current and the first duration, controlling the target battery to be charged or discharged. By controlling charging and discharging currents and charging and discharging time, the present application can regulate open-circuit voltages of batteries to the target open-circuit voltage, and can ensure high precision of open-circuit voltage regulation.

A radio frequency power detection device and a radio frequency power detection system are provided. The radio frequency power detection device includes a first microstrip line, a second microstrip line, a voltage detection unit, a capacitor unit, and a distance testing unit. The first microstrip line is connected to a radio frequency power supply. The second microstrip line is disposed parallel to the first microstrip line and coupled to the first microstrip line, and a predetermined point on the second microstrip line is grounded. The voltage detection unit is connected to one end of the second microstrip line and is configured to detect a voltage of the second microstrip line. The capacitor unit is connected to the first microstrip line and the second microstrip line, or the predetermined point on the second microstrip line is grounded through the capacitor unit.

Method for charging a battery (100) with a first voltage (116) and a second voltage (118), wherein the method has in a first phase (306) applying a constant current to the battery (100); in a second phase (308) applying current pulses (310) to the battery (100), wherein the current pulses are separated by a current pause (312) during which the current is at or near zero; Provision of a fixed reference voltage; iterative repetition a sampling of the first voltage (116) during a current pulse (310) to obtain a measurement of the first voltage; a sampling of the first voltage (116) during a current pause (312) in order to obtain a measurement of the second voltage (118); a generating of a dynamic reference voltage (302) based on the fixed reference voltage and on a difference between the measurement of the first voltage and the measurement of the second voltage; a comparison of the measurement of the first voltage with the dynamic reference voltage (302); Terminating the application of the current pulses (310) when at least one of the measurements of the first voltage is equal to the dynamic reference voltage (302) and the measurement of the second voltage is equal to the fixed reference voltage.

The application discloses a control method, device and equipment of a knee rest sewing machine and a medium, and belongs to the technical field of sewing machines. The method comprises the following steps: detecting the knee rest voltage of the knee rest sewing machine in real time to obtain a target knee rest voltage; and switching the operation mode of the knee rest sewing machine according to the voltage variation characteristics of the target knee rest voltage; wherein the operation mode of the knee rest sewing machine comprises a presser foot control mode and a stitch control mode; and after the operation mode of the knee rest sewing machine is switched, the step of detecting the knee rest voltage of the knee rest sewing machine in real time to obtain the target knee rest voltage is continuously performed. Through the method, the presser foot control mode and the stitch control mode of the knee rest sewing machine can be flexibly switched, and the cumbersome step of freeing the hands to operate the operation panel of the knee rest sewing machine during the process of sewing the cloth by using the knee rest sewing machine can be avoided, so that the stitch deviation phenomenon of the cloth during the sewing process can be avoided.

The application introduces a roadside traffic signal data acquisition and processing system and method, wherein the roadside traffic signal data acquisition and processing system comprises: a traffic signal controller for controlling the traffic light at the road intersection; and a signal protocol conversion device for acquiring the data of the traffic signal controller and sending the acquired data to a data center. The signal protocol conversion device comprises a voltage acquisition unit for acquiring the voltage data in the traffic signal controller and a pulse detection unit for acquiring the pulse data in the traffic signal controller, and the voltage acquisition unit and the pulse detection unit are connected with the traffic signal controller respectively. Based on the above system design, the roadside traffic signal data acquisition and processing method designed by the application has the advantages of wide voltage acquisition range, high acquisition frequency, short processing time, wide adaptability and high reliability.

A circuit arrangement has a main monitoring channel with a first analog-to-digital converter (ADC), a redundant monitoring channel with a second ADC, and a comparison unit. The first ADC carries out an analog-to-digital conversion of a signal provided at its input, which is representative of a cell voltage of the rechargeable battery cell, in order to obtain a first digital cell voltage signal. The second ADC carries out an analog-to-digital conversion of a differential signal which is representative of a difference between a reference voltage or a supply voltage of the second ADC and the signal, in order thus to obtain a second digital level-shifted cell voltage signal. Each ADC is designed to carry out the analog-to-digital conversion of the signal or the differential signal depending on a reference voltage, wherein the reference voltage of the first ADC is equal to the reference voltage of the second ADC.

Semiconductor component, comprising: a substrate (21); a lower insulating film (22) formed on the substrate; a resistor (23) formed on the lower insulating film; an upper insulating film (24) formed on the lower insulating film such that it covers the resistor; and wherein the lower insulation film comprises a first nitride film (33) and a first SiO-based insulation film (34) formed on the first nitride film, wherein the upper insulating film has a second nitride film (42), where the resistance is formed on the first SiO-based insulation film, and wherein a lower surface of a circumferential edge section of the second nitride film is connected to an upper surface of the first nitride film.

The present invention relates to a method for determining a back electromotive force (34) of an electric engine (14) of a motor vehicle (10) by an electronic computing device (16), comprising the steps of: determining a battery voltage (vdc) of a battery (12), a phase voltage (vu, vv, vw), and a phase pole voltage (vun, vvn, vwn) of the electric engine (14);- determining a voltage value (um, vm, wm) of a power device (22, 24, 26, 28, 30, 32) of the electric engine (14) depending on the battery voltage (vdc), the phase voltage (vu, vv, vw), and the phase pole voltage (Vun, Vvn, Vwn); and determining the back electromotive force (34) depending on the voltage value (Um, Vm, Wm).