1005 results about "Voltage divider" patented technology

The invention discloses a DC voltage divider parameter anomaly detection method based on harmonic characteristics, and the method comprises the steps: deploying an isolation type voltage sensor at a bus of a DC power transmission system, carrying out the voltage sampling through combining with an ADC, carrying out the data buffering and preprocessing, extracting a fundamental wave component and a target harmonic component through the fast Fourier transform, and calculating the harmonic distortion rate. And constructing a low-voltage arm capacitance and harmonic distortion rate model based on a voltage divider secondary circuit equivalent circuit and an energy distribution principle, and calibrating the low-voltage arm capacitance and harmonic distortion rate model. And designing a multi-objective optimization scheduling algorithm based on energy storage capacity and capacitance characteristics, and realizing dynamic power distribution and harmonic suppression of the system. And after abnormal triggering, the system automatically loads a capacitance compensation coefficient, adaptively adjusts algorithm parameters in combination with a measurement loop PI control link, reduces a harmonic amplification effect, and ensures that a measurement error is within an acceptable range. Harmonic monitoring precision and capacitance compensation optimization capability of the direct-current power transmission system are effectively improved, and stable operation of the system is guaranteed.

The invention relates to the technical field of voltage acquisition, in particular to a battery string voltage acquisition system with a calibration system and a voltage acquisition method. Which comprises a multi-path voltage input end, a voltage signal adjusting end, a voltage follower, an analog-to-digital converter, a main control center and a communication circuit, and is characterized in that the voltage signal adjusting end comprises a dynamic voltage division network, consists of a digital potentiometer and a high-voltage operational amplifier, and dynamically adjusts the voltage division ratio to suppress common-mode voltage; the main control center is integrated with a multi-channel synchronous sampling calibration module and generates a global synchronous signal through the main MCU to control the ADC to perform synchronous acquisition; a temperature compensation module is arranged between the voltage follower and the ADC, and a digital temperature sensor is adopted to correct the gain drift of the operational amplifier in real time; the voltage division ratio of the dynamic voltage division network is dynamically adjusted according to the real-time common-mode voltage and a preset safety threshold value. According to the scheme, dynamic partial pressure adjustment, multi-channel self-calibration, nonlinear temperature compensation and a rapid protection mechanism can be integrated.

The invention relates to the technical field of medical instruments, in particular to a high-precision time interference non-invasive brain deep electrical stimulation method, equipment and system, and solves the problems that two stimulation electrodes are used for each pair of current in traditional time interference-based non-invasive brain deep electrical stimulation, so that the current distribution is relatively dispersed, and the stimulation focusing performance is relatively poor. According to the method, high-precision 4 * 1 electrode configuration is used, two electrodes for applying a stimulation current are changed into a 4 * 1 electrode form, the flowing path of the current is effectively limited, the current is more focused, and the focusing performance of the interference current is further improved. According to the device, high-precision current control is realized through the anti-phase output circuit, the 4 * 1 voltage division circuit, the constant current source module and the impedance detection module; the system supports forward and reverse electrode position optimization, a personalized real finite element head model simulation system based on MRI data is used for guiding practical application, the focusing performance of each pair of current in a target brain region is improved, and therefore the overall stimulation precision in the target brain region is improved.

A device for ascertaining a property of a fluid, having: an electric conductor assembly which is designed to be at least partly brought into contact with the fluid and which is designed as a voltage divider with two elements, wherein the first element is a first conductor which, at least in a current-conducting state, has a resistance value that differs from that of the second element; a measuring bridge with two voltage dividers connected in parallel, one of said voltage dividers being formed by the electric conductor assembly; an actuation unit for applying an AC voltage to the measuring bridge; a voltage detection unit for detecting a bridge voltage; and an analysis unit which is configured to ascertain a thermal conductivity as the property of the fluid by analyzing the bridge voltage using the 3-omega method.

The invention belongs to the technical field of current source control, and particularly relates to a self-adaptive intelligent current source output control system, and the system works cooperatively through a plurality of modules: a load detection module monitors the load access state in real time, converts a current signal into a voltage signal Udetect, and outputs the voltage signal Udetect; the state stabilization filtering module receives the signal, filters high-frequency noise through an RC low-pass filtering unit, amplifies the signal through an in-phase proportion amplification unit, and is internally provided with a signal monitoring and judging unit to extract a load characteristic signal INPUTIDE in a stable working state; the feedback calculation module generates a feedback control parameter through preset threshold comparison and logical operation according to the INPUTIDE; the analog switch control module selects a resistance potential-divider network input channel according to the feedback control parameters, and outputs a current source regulation and control signal VC; and the adjustable current source module outputs a working current adaptive to the load according to the VC. The self-adaptive intelligent current source output control system is superior to a traditional system in dynamic adaptation, protection mechanism, multi-scene adaptation, precision and stability.

An electrically conductive circuit has a distal end coupled to a catalytic converter of a vehicle. A sensor such as a voltage divider is coupled to a proximal end of this conductive circuit. The voltage divider senses when a resistance associated with the conductive circuit is altered, indicative of catalytic converter tampering. An alarm signal can then be sent to the vehicle horn or otherwise beneficially outputted to warn of the tampering. The conductive circuit preferably includes a length of nichrome wire having a substantial resistance. Reliable electrical connection and tampering avoidance can be provided at the distal end of the nichrome wire by utilizing an electrically conductive washer at the distal tip, covering the nichrome wire with high temperature insulating tape, overlying the tape with a pipe clamp and encapsulating the washer, distal end of the nichrome wire, insulating tape and pipe clamp with a high temperature bonding adhesive.

The invention discloses an intelligent control method and system for calibration of a full-automatic sectional direct-current voltage divider, and relates to the technical field of intelligent control and decision making, and the method comprises the steps: automatically recognizing basic parameters of a calibrated voltage divider through a scanning test, detecting the sectional characteristics of the calibrated voltage divider, and building a characteristic model of the calibrated voltage divider; determining a calibration scheme according to the characteristic model, generating test point distribution, time sequence control parameters and a security policy, performing segmented calibration based on the calibration scheme, calculating error information of each test point, obtaining an independent compensation coefficient of each segment according to segmentation characteristics by combining temperature compensation, and performing compensation correction; and obtaining the corrected test point calibration result distribution to evaluate the health state of the calibrated voltage divider, and outputting a calibration conclusion including health state evaluation. Through the intelligent calibration process, the calibration efficiency and accuracy of the direct current voltage divider are remarkably improved, meanwhile, the operation risk is reduced, and reliable technical guarantee is provided for high-voltage direct current measurement.

In the present invention, an abnormality detection unit comprises first voltage divider resistors connected between a first external terminal and a second external terminal, second voltage divider resistors connected between the second external terminal and a ground potential application end, first switches connected between the first external terminal and the second external terminal, second switches connected between the second external terminal and the ground potential application end, first comparators configured to compare the voltage between the first external terminal and the second external terminal with first reference voltages, and second comparators configured to compare the voltage between the second external terminal and the ground potential application end with second reference voltages.

The invention discloses an electronic device and a voltage leakage circuit, the electronic device comprises a control circuit and a power circuit, the control circuit is connected with the power circuit and is used for controlling the power circuit to perform leakage or stop leakage, and the control circuit comprises a voltage division circuit; the comparison circuit is connected with the voltage division circuit and is used for receiving the first voltage from the voltage division circuit and comparing the first voltage with a preset reference voltage; the driving circuit receives the first reference voltage, is connected with the comparison circuit and the power circuit, and is used for outputting the first reference voltage to the power circuit when the first voltage is greater than or equal to the reference voltage so as to control the power circuit to discharge; one end of the hysteresis circuit is connected with the power circuit, the other end of the hysteresis circuit is connected between the voltage division circuit and the comparison circuit, and the hysteresis circuit is used for increasing the first voltage when the driving circuit outputs the first reference voltage to the power circuit. The power circuit is controlled through the voltage division circuit, the comparison circuit and the driving circuit, the cost can be reduced, and the occupied space is small.

The invention discloses a final-stage voltage tracking anti-clipping circuit for an audio power amplifier, and relates to the technical field of power amplifiers, and the circuit comprises a voltage division circuit which is used for receiving final-stage voltage from target power amplifier equipment and generating a combined voltage signal; the audio attenuation module is used for receiving an audio input signal and a final-stage voltage, and judging whether amplitude limiting modulation is carried out on the audio input signal or not to complete power amplifier output by judging whether a starting signal is received or not; and the starting judgment module is used for receiving the combined voltage signal and the first output signal, and comparing the combined voltage signal with the first output signal to generate a starting signal. According to the invention, the collected final-stage voltage of the target power amplifier is set as the dynamic amplitude limiting threshold, so that an over-high signal can be effectively suppressed to a safe range quickly when the power supply drops instantaneously, and the effects of avoiding hearing deterioration caused by power amplifier signal waveform truncation and avoiding potential safety hazards caused by amplitude limiting and topping to the loudspeaker are achieved.

The invention discloses a high-voltage sampling system and method. The high-voltage sampling system comprises a switch control module, a voltage dividing module, a first monitoring module, a high-voltage sampling module and a main control module, in the voltage dividing module, a first-stage voltage dividing unit is electrically connected with a high-voltage bus through a switch control module; the second-stage voltage dividing unit and the first-stage voltage dividing unit are electrically connected to a first voltage dividing node; the third-stage voltage dividing unit and the second-stage voltage dividing unit are electrically connected to a second voltage dividing node; the first monitoring module is used for monitoring the voltage of the first voltage dividing node, controlling the switch control module to be switched off when the voltage of the first voltage dividing node is abnormal, and providing a first feedback signal for the main control module; the high-voltage sampling module is used for collecting the voltage of the second voltage dividing node and providing a high-voltage sampling signal for the main control module; and the main control module is used for controlling the switch control module to be switched off according to the first feedback signal when the voltage of the first voltage division node is abnormal. By adopting the technical scheme, the safety and the reliability of the high-voltage sampling system are improved.

The invention discloses a switching-in circuit with a self-adaptive voltage class and a double check logic. The switching-in circuit comprises a high-precision voltage division module, a double-redundancy sampling framework and a double sampling judgment logic executed by an MCU (Microprogrammed Control Unit), the high-precision voltage dividing module adopts a resistance network matched with a temperature coefficient, and can accurately divide input voltage in a wide temperature range; the double-set redundancy sampling architecture performs parallel sampling on the same path of input signals through two sets of completely independent signal conditioning loops, ADCs, digital isolation chips and isolation power supplies to form a physically isolated redundancy channel; the dual sampling discrimination logic executed by the MCU verifies a dual-channel sampling result based on a logic voting mechanism, and finally outputs a reliable input state or an abnormal alarm; according to the invention, through adaptive voltage design and redundancy check, high reliability is ensured, meanwhile, the requirements for spare parts of equipment of different voltage grades are remarkably reduced, and the inventory management cost is effectively reduced.

The utility model belongs to the technical field of electronics, and relates to a detection circuit for high-voltage measurement of insulation resistance based on a solid-state optocoupler relay, when control signals output by an MCU in the detection circuit are HVPI NIOPP and HVP + I NIO, U27 and U34 in the detection circuit are conducted, and a voltage follower U29A is used for measuring the voltage U1 of a total voltage negative to a shell CAMP; when the control signals output by the MCU in the detection circuit are HVPI NIO and HVP-I NIO, U31 and U44 are conducted, and a voltage follower U29B measures the voltage U2 of the total voltage directly facing the shell CAMP; a series connection mode of U36, U27, U31, U34 and U44 is adopted, large voltage is increased, current in a loop is reduced during detection, and the withstand voltage value of the detection circuit is improved; a divider resistor group is used for dividing voltage, and a voltage follower is added, so that coupling of external interference is reduced, and the measurement precision is improved; and an isolated power supply mode is adopted, so that the complete isolation of the battery end and the MCU processing end is met.

The invention relates to the technical field of switching power supply, and discloses a switching power supply constant-current protection circuit and a protection method thereof.The switching power supply constant-current protection circuit comprises an environmental parameter sensing module which collects current signals of a constant-current output loop through a shunt resistor and a differential amplifier, collects input voltage through a resistance voltage-dividing network and collects temperature through a thermistor; the dynamic threshold value generation module is used for receiving the current signal and the environment parameter and generating a dynamic current protection threshold value to maintain constant current output; the AI prediction protection module is used for sampling current signals, extracting high-frequency energy characteristics through frequency domain analysis and comparing the high-frequency energy characteristics with a dynamic current protection threshold value; a digital twin monitoring module; and a protection execution module. Temperature parameters are collected in real time, polynomial fitting calculation is executed, the nonlinear characteristic of a thermistor is converted into a linear compensation coefficient, a protection threshold value is dynamically generated in combination with a current effective value and input voltage fluctuation, and self-adaptive drift compensation of a constant-current protection point in a full temperature range is achieved.

A method for detecting movement of a vehicle body component moveable by an electric motor having a rotor and a three-phase stator, and a motor vehicle. The method includes: loading two stator phases with a pulse-width-modulated voltage and maintaining a third stator phase at a free-floating state; monitoring the third stator phase as a measuring point for an inductive voltage divider formed using the two stator phases; and detecting movement of the vehicle body component when an electric signal at a measuring point or a variable derived from the electric signal exceeds a specified threshold value. The motor vehicle includes a control device that is operable to perform the method.

The invention discloses an aging test circuit and system of a vacuum arc-extinguishing chamber comprehensive mode, and relates to the technical field of high-voltage power equipment. The circuit comprises a booster circuit, a rectifier bridge, a voltage divider, a first high-voltage switch, a capacitor tower, a reactor group, an ignition device, a frequency modulation resistor, a frequency modulation capacitor, an auxiliary switch, a second high-voltage switch, a first transformer, a variable-frequency power supply, a detachable vacuum arc-extinguishing chamber and a direct-current measuring resistor. The circuit can adjust the stored energy of the capacitor tower and the voltage of the variable-frequency power supply according to the ablation condition of a contact in the vacuum arc-extinguishing chamber, so as to adjust the magnitude and frequency of the current released by the capacitor tower during an aging test and the magnitude and frequency of the voltage released by the transformer. Therefore, aging energy of large current / or small current / or voltage with different frequencies is applied during an aging test, and the aging energy and the action mode of the energy are ensured to be matched with the current state of the contact by controlling the energy applying mode and the energy applying frequency under different contact opening distances.

The utility model provides a capacitor module for solving battery abnormity of a power utilization acquisition terminal in a low temperature scene, a voltage determination circuit, a super-capacitor charging circuit and a boost circuit are integrated on a printed board, the voltage determination circuit comprises a chip U1 and a divider resistor, the super-capacitor charging circuit comprises a chip U2 and a shunt resistor, and the boost circuit comprises a chip U1 and a chip U2. According to the boost circuit, an internal logic power supply pin of a chip U3 is connected with a BOOST circuit output by the BOOST circuit, a reset signal pin of a chip U1 is connected with enable signal pins of a chip U2 and the chip U3, a power supply pin of the chip U1 is connected with a nickel-metal hydride battery charging circuit, an input end of the chip U2 is connected with the nickel-metal hydride battery charging circuit, an output end of the chip U2 is connected with a super capacitor, and the super capacitor is connected with a power supply pin of the chip U1. The input end and the output end of the chip U3 are both connected with the nickel-metal hydride battery charging circuit, and a switch pin of the chip U3 is connected with the super capacitor. By adopting the technical scheme, the cost is lower than that of a low-temperature nickel-metal hydride battery, and a nickel-metal hydride battery pack can be directly replaced.

The invention provides a power-on reset circuit and a chip. The power-on reset circuit comprises a power-on module, and the power-on module is used for controlling connection or disconnection of a first end and a second end of the power-on module based on a control voltage and a power supply voltage of a first power supply end, and adjusting an output voltage of the power-on module based on the change of the power supply voltage when the power-on module is connected; the voltage dividing module is used for providing control voltage to the power-on module; the conversion module is used for converting the output voltage of the power-on module to output a reset control signal under the condition that the output voltage of the power-on module is changed to the overturning voltage of the conversion module; the first inverting module is used for converting the reset control signal to output a reset signal. Therefore, the power consumption generated in the circuit can be reduced while the circuit area is saved.

The present invention discloses an LDO circuit with soft start and foldback current limiting protection functions, including a bandgap reference module, a soft start module, a voltage selection module, a current limiting protection module, a first error amplifier, an output power tube, a first voltage divider resistor, and a second voltage divider resistor; the present invention realizes that there is no overshoot when the LDO is powered on, and the power consumption of the chip after entering the foldback current limiting is greatly reduced, thereby ensuring the safety of the chip. By reusing the control signal of the soft start circuit, the problem of failure to start with a constant current load in the traditional foldback protection circuit is solved, and the ability to power on with a load is improved. At the same time, it can be easily adjusted by V SET The voltage can flexibly adjust the current limit value at power-on according to the load requirements, providing good protection for the chip while meeting the application requirements.

The present invention discloses a hybrid switching converter with a single inductor and multiple outputs and a control method thereof, configured to convert an input voltage to a first and a second output voltages. The hybrid switching converter includes: a sub-switching converter, which converts the input voltage to an intermediate voltage; a first and a second output switches, which conduct the intermediate voltage during a first and a second inductance periods, respectively, to generate the first and second output voltages. The sub-switching converter comprises: a switched capacitor voltage divider circuit, which controls multiple switches through pulse-width modulation (PWM) signals to generate two divided voltage levels in each inductance cycle for supplying an inductor therein; and a control circuit, which generates PWM signals to control the multiple switches and the output switches in a time-division manner, and regulates the output voltages to target values according to output voltage feedback signals.

The invention relates to an SPI (Serial Peripheral Interface) lamp bead number detection method, which comprises the following steps of: A, cascading a plurality of lamp beads to form an LED (Light Emitting Diode) lamp bead link, and controlling the on-off of each lamp bead through an MOS (Metal Oxide Semiconductor) tube driving circuit; b, the ADC detection module collects current signals through divider resistors R1 and R2 of the resistance divider network; c, dynamically calibrating a zero lamp bead reference voltage V, setting a current change threshold value epsilon, measuring a zero lamp bead reference current I, and recording a single lamp bead standard current delta I = I-I when the first lamp bead is lightened; d, sequentially lightening the single lamp beads one by one through the MOS tube driving circuit, dynamically recording the characteristic voltage delta V of the single lamp bead through the main controller when one lamp bead is lightened, comparing the current change value delta I'with the current change threshold epsilon, establishing a current change curve, recording the lamp bead with the current change value within the epsilon range as a normal lamp bead, and recording the lamp bead with the current change value within the epsilon range as a normal lamp bead. And judging the number of the normal lamp beads according to the dynamic current of the lamp beads and the linear change relationship between the upper and lower measuring points of the resistance potential-dividing network when the detected voltage is regressed to V + / -epsilon.

The present disclosure provides a semiconductor device and an electrostatic discharge (ESD) clamp circuit. The semiconductor device includes a voltage divider, a cascoded inverter, and a discharge circuit. The voltage divider is electrically coupled between a power supply voltage and an output voltage of the semiconductor device. The cascoded inverter is electrically coupled to the voltage divider. The discharge circuit is electrically coupled to the cascoded inverter. The cascoded inverter is configured to turn on the discharge circuit to discharge an electrostatic discharge (ESD) current in response to an ESD event occurring on the power supply voltage or the output voltage when the semiconductor device is in an ESD mode.

The utility model discloses a control circuit of a domain controller, and relates to the technical field of circuits. Comprising a voltage monitoring circuit located between the storage battery and the primary power supply. The voltage monitoring circuit comprises a first processor, a first voltage division circuit and a first switch. When the voltage of the first input end is detected to be greater than or equal to an overvoltage threshold value, or the voltage of the second input end is detected to be smaller than an undervoltage threshold value; and controlling a first output end of the first processor to output a signal for controlling the first switch to be in an off state, and controlling a third output end of the first processor to output a signal for representing that the voltage of the storage battery is in an under-voltage or over-voltage state to a system-on-chip. Under-voltage or over-voltage detection of the storage battery is achieved, and when it is detected that the storage battery is in an under-voltage or over-voltage state, the first switch is controlled to be turned off, that is, under-voltage turn-off of the power supply can reduce static power consumption of a product during under-voltage; the overvoltage turn-off power supply prevents each stage of power supply from being damaged, and the reliability of the domain controller and the product is improved.

The utility model discloses a low-power-consumption high-efficiency main transformer integrated board for an air-cooled refrigerator, which comprises an X capacitor discharge circuit, a variable-frequency power supply circuit, a bus voltage sampling circuit, a mains supply voltage sampling circuit and an IGBT (Insulated Gate Bipolar Translator) driving circuit, and is characterized in that the X capacitor discharge circuit uses a discharge chip to replace a traditional discharge resistor; the variable-frequency power supply circuit is additionally provided with a variable-frequency power supply switch circuit, the bus and commercial power voltage sampling circuit modifies the resistance value of a divider resistor, and the IGBT driving circuit modifies the resistance value of a resistor. According to the utility model, improvement is made on the basis of a traditional air-cooled refrigerator main transformer integrated plate, the standby power consumption and the operation power consumption of the main transformer integrated plate are reduced, and the low-power-consumption and high-efficiency electric control design is realized.

This invention relates to the field of integrated circuit I / O interface design technology. It discloses a dual-mode (digital-analog) input / output interface circuit based on low-voltage devices adapting to high-voltage power supplies, aiming to solve the problems of low-voltage process chips being unable to directly adapt to high-voltage power supplies and limited I / O functionality. The interface circuit includes a digital output module, a digital input module, an analog I / O module, and a mode summary and ESD circuit. Through external configuration signals, the circuit can switch between digital input, digital output, analog I / O, and power-down modes. The digital output module incorporates a dual-mode high-voltage adaptation mechanism, utilizing a voltage divider resistor series and a common-gate protection transistor to ensure the safety of low-voltage devices under high voltage. The digital input module employs non-overlapping control to eliminate dynamic power consumption. A full-mode high-impedance isolation design ensures the reliability of mode switching. This invention achieves safe adaptation of standard low-voltage CMOS devices to high-voltage power supplies and integrates dual-mode functionality, offering advantages such as high integration, low power consumption, high reliability, and strong process compatibility.

A high-gain photomultiplier tube and a method for manufacturing the same. The photomultiplier tube comprises an upper ceramic substrate and a lower ceramic substrate, with a photocathode, a grid, an anode, and a plurality of electron multipliers disposed between the two ceramic substrates. A metal conductive film is deposited on the surfaces of the upper and lower ceramic substrates opposite the electron multipliers, and the metal conductive film is in mechanical contact with each electron multiplier. The photocathode, grid, anode, and electron multipliers are each connected and fixed to the ceramic substrate via positioning pins. A voltage divider resistor is connected between the photocathode and the positioning pin of the first-stage electron multiplier, between the positioning pins of two adjacent electron multipliers, and between the positioning pin of the last-stage electron multiplier and ground. The potential of each electron multiplier is set by adjusting the voltage divider resistor, and the potential difference between two adjacent electron multipliers and the potential difference between the last-stage electron multiplier and ground is in the form of a differentiated voltage divider. The present invention improves the gain and lifespan of the photomultiplier tube.

The utility model relates to the technical field of industrial semiconductors, and discloses a device for detecting the working state of a lamp holder of ultraviolet light curing equipment, which integrates temperature, wind pressure and ultraviolet light intensity detection functions by optimizing the structure of a hardware circuit. The circuit comprises a switch type capacitor voltage converter, a linear voltage regulator, a phototriode, an NTC thermistor, a partial pressure sensor and a CAN communication module. Through the bidirectional TVS diode, RC filtering and two-stage voltage stabilization design, the anti-electromagnetic interference capability is improved, and the signal transmission reliability is improved; temperature, wind pressure and illumination detection circuits are integrated on a single board, the structure is simplified, and the space is saved; the standby energy consumption of the sensor is reduced through hardware power management; by comprehensively optimizing the circuit structure and the signal transmission path, the detection reliability of the working state of the lamp holder of the ultraviolet curing equipment is improved.

The embodiments of the present invention disclose a bandgap reference circuit, a reference voltage source, and a reference voltage generation method. The circuit includes a current module, a differential input module, a limit module, a feedback module, and a voltage divider module. The differential input module generates a first conduction current and a second conduction current in response to a first voltage signal and a second voltage signal of the voltage divider module, respectively, and further outputs a first output current and a second output current, respectively. The limit module outputs a drive signal in response to the first output current and the second output current to control the feedback module to adjust the first voltage signal and the second voltage signal so that the first output current and the second output current are equal, so that the differential input module outputs a reference voltage with a zero temperature coefficient. The limit module includes a matching resistor or a low transconductance switch tube to reduce the offset voltage. The present invention reduces the offset voltage of the limit module and improves the accuracy of the reference voltage by setting a matching resistor or a low transconductance switch tube in the limit module.

This application discloses an MCU sleep / wake-up circuit, including a signal circuit, a second sleep control transistor Q2, a first hierarchical sleep control transistor Q1, an LDO chip U, and a control unit MCU. The signal circuit outputs a wake-up signal. The base of the second sleep control transistor Q2 is connected to the output terminal of the signal circuit through a current-limiting resistor R4, grounded through a voltage divider resistor R9, and connected to the enable terminal ENA through a current-limiting resistor R3. The enable terminal ENA is connected to the control unit MCU, the emitter is grounded, and the collector outputs a control signal. The control signal is input to the first hierarchical sleep control transistor Q1 through a bias voltage divider circuit. The emitter of the first sleep control transistor Q1 is connected to the power supply VIN, and the collector outputs the power supply voltage to the LDO chip U. The LDO chip U outputs its operating voltage to the control unit MCU. When the control unit MCU is working, it outputs a high level to the enable terminal ENA. This application can reduce the complexity of the sleep / wake-up system and achieve low-power sleep and reliable wake-up of the control unit MCU.

This invention discloses a high-voltage capacitor safety discharge device and method, relating to the field of safety discharge technology. The device includes a discharge box, a resistor box, and a control box. The top of the discharge box is equipped with a test electrode for connection to the component to be discharged. Inside the discharge box are at least two robotic arm modules and a voltage divider for monitoring the voltage of the component to be discharged. A conductive electrode is located at the end of each robotic arm module facing the test electrode. The resistor box contains at least two sets of discharge resistors with different resistance values ​​and a temperature sensor. The input terminal of each discharge resistor is connected to a corresponding conductive electrode, and the output terminals of each discharge resistor are connected in series with a current sensor and then grounded. The control box is configured to control at least one robotic arm module to move towards or away from the test electrode based on signals output from the voltage divider, current sensor, and temperature sensor, thereby controlling at least one conductive electrode to contact or disconnect from the test electrode. This invention can improve safety during the discharge process.