46results about How to "Wide supply voltage range" patented technology

The invention discloses an equalizing charge method and an equalizing charger. The equalizing charge method comprises the following steps: (1) connecting N (N is integer and is more than or equal to 2) single batteries in a battery pack in parallel; (2) independently and quickly charging the N single batteries at the same time; and (3) after the single batteries meet the charge requirement, finishing charging the battery pack. The equalizing charge method of the invention changes the series discharge mode of the single batteries of the battery pack into a parallel mode to independently charge the batteries of the battery pack, thus independently controlling the charge process of the single batteries to ensure equalizing charge for the single batteries. The charger of the invention uses a single chip control center as the core, and simply and precisely realizes independent charge and independent control of the single batteries.

The invention relates to a pond culture water quality monitoring system and a pond culture water quality monitoring method, in particular to a pond culture water multi-parameter acquisition system and a pond culture water multi-parameter acquisition method. The pond culture water multi-parameter acquisition system comprises a water quality data acquisition node and an on-site wireless communication network, wherein the on-site wireless communication network is based on Institute of Electrical and Electronics Engineers (IEEE)802.15.4 communication protocol; the network node of the on-site wireless communication network comprises a personal area network (PAN) coordinator, a full-function device (FFD) and a reduced-function device (RFD); the on-site wireless communication network is constructed into star topology and peer-to-peer network topology; and the data acquisition node comprises a water quality sensor and a wireless network transceiver, and after receiving sensor data, transmits water quality data to a wireless network periodically. In the invention, water quality data can be acquired in a large-scale culture fish pond in real time for regulating the quality of the water in the culture pond and automatically controlling on-site equipment.

The invention discloses a vehicle anti-theft detection method and a vehicle anti-theft detection device. The vehicle anti-theft detection method includes the steps of 1), detecting signal output of a vibrating sensor and an acceleration sensor at any time through a processor; 2), amplifying signals through an amplification circuit and filtering the same through a filter circuit, and transmitting the signals to the processor for comparison; 3), directly outputting alarm signals when the signals exceed a preset threshold value, or otherwise returning to the step 1); 4), or when duration of the signals exceeds 3 seconds, frequency of the signals is within an abnormal frequency range and amplitude of the signals is higher than the preset threshold value, outputting the alarm signals, or otherwise not outputting the alarm signals. The vehicle anti-theft detection method has the advantages that vehicle states can be comprehensively detected through the vibrating sensor and the acceleration sensor, and the defect that an existing vibrating sensor is prone to acoustic interference and false alarms is avoided.

The invention discloses a high-power dimming electrodeless lamp. The high-power dimming electrodeless lamp comprises an anti-electromagnetic interference filter, a bridge rectifier module, an active power factor corrector, a half-bridge inverter oscillatory circuit, a power output device, a starting controller, a high-frequency coupler, a dimming circuit and an HB0809 integrated circuit, wherein the half-bridge inverter oscillatory circuit is used for converting a direct current voltage into a high-frequency alternating voltage; the power output device is used for supplying output power to the half-bridge inverter oscillatory circuit when the half-bridge inverter oscillatory circuit works; the starting controller is used for controlling the turning on and turning off of the electrodeless lamp; the high-frequency coupler is used for coupling electric energy of the active power factor corrector and the power output device to the lamp tube of the electrodeless lamp; the dimming circuit is connected with an externally connected dimming control circuit; when the externally connected dimming control circuit supplies a 0 to 10-volt direct current (VDC) dimming control voltage signal to the dimming circuit, the dimming circuit works and then converts the alternating voltage into a 18-volt direct voltage; and the HB0809 integrated circuit is connected to the half-bridge inverter oscillatory circuit and used for controlling the alternately turning on and turning off of a first metal oxide semiconductor (MOS) tube and a second MOS tube in the half-bridge inverter oscillatory circuit to set working frequency, ignition time and ignition frequency. By a dimming electrodeless lamp circuit, a dimming function of the high-power electrodeless lamp can be realized.

The invention discloses a device and a method for a rainfall test of a transmission line tower. The device comprises a tower, wires, nozzles, a water supply device and a power supply device. The wires are fixed in the tower, and the nozzles are located above the wires and fixed right under the tower. The power supply device supplies power to the wires, the nozzles are connected with the water supply device, and the tower and the wires are sprayed with water to simulate various states in the rain. The water supply device comprises a water pump and a water tank. The method for the rainfall test includes nozzles required in the test are selected to be fixed right under the tower, the power supply device supplies power for the wires, the water tank and the water pump are used for providing water for the nozzles which spray water to the tower and the wires to simulate various states in the rain to perform the rainfall test. The rainfall test provided by device and the method is wide in voltage ranges, adjustable in rainfalls and adjustable in acidity of the rainfalls, and is applicable to transmission line towers with a voltage class of over 110 kV (kilovolt)..

The invention relates to a low drop-out overcurrent protection circuit with controllable output. The overcurrent protection circuit comprises a main path, an auxiliary path, a reverse voltage protection circuit, a main and auxiliary path overcurrent switching and enabling inhibit control circuit, an efficiency adjustment resistor, an overcurrent sampling resistor and a limited current setting circuit; the overcurrent protection circuit has the functions of automatic overcurrent protection and output enabling / forbidding, is connected to a power entrance of a circuit in series, and can realize the functions of single event latchup resistance of satellite-bone equipment components and short circuit overcurrent protection of the circuit, thus having high practical value. The special application specific integrated circuit (ASIC) chip customized according to the low drop-out overcurrent protection circuit with controllable output well meets the application demands of satellite-bone equipment of a spacecraft and is beneficial to improvement of the equipment integration level; furthermore, the circuit overcurrent protection also has very strong universality for circuits besides the spacecraft.

The invention discloses an electronic cam master controller, which comprises an electronic cam controller (1) and is characterized in that: the electronic cam controller (1) is provided with a positioning disk (3); the positioning disk (3) is provided with an annular groove (11) and double synchronous rows of positioning concave holes (12); steel balls (4) and springs (5) are arranged in the double rows of positioning concave holes (12) respectively; a key slot of a handle (6) is formed in alignment with a key (2) of the electronic cam controller (1); the handle (6) is concentrically flush with the positioning disk (3); the handle (6) is provided with a retaining screw (8); the retaining screw (8) slides in the annular groove (11) of the positioning disk (3); a corresponding cam sheet in the electronic cam controller (1) corresponds to an inductance contact-free proximity switch; and the proximity switch is directly connected with a digital quantity input module of a PLC (ProgrammableLogic Controller). The electronic cam master controller has the advantages of one-time installation and adjustment, freeness from maintenance, simple structure, low labor intensity and normal equipment running.

The invention discloses an integrated power factor correction (PFC) high-voltage half-bridge resonant and synchronous rectification AC / DC power module. An input interference resistant and rectification filtering circuit, a PFC and control circuit, an LLC high-voltage half-bridge resonant and control circuit, a dual-quick-breaking intelligent control circuit, a voltage detection system reset IC circuit, a synchronous rectification circuit, a filtering circuit, a voltage stabilization circuit, an auxiliary power supply circuit and a protection circuit are mainly integrated to form a brand-new module design. The AC / DC power module has the characteristics of small size, high integration degree, light weight, high reliability, high efficiency, wide application range and the like; in the AC / DC power module, a plurality of advanced circuits are matched with one another, so that the defect of a traditional circuit is overcome, the protection function is optimized, and meanwhile, brand-new module AC / DC and DC / DC secondary conversion is perfectly achieved.

The invention discloses an intelligent-type power distribution cabinet for a power transmission system, and the cabinet comprises a cabinet body. The cabinet body is provided with a cabinet door, and the cabinet door is sequentially provided with a switch, a work indication lamp, a sound generation device, a handle, a display screen and a state indication mechanism from the top to the bottom. The cabinet enables a semispherical reflection plate to move towards the state indication lamp through the rotation of a drive motor in a strong light unit, thereby changing the propagation direction of light emitted by the state indication lamp towards the cabinet door, enabling the light intensity of the state indication lamp to be higher, and attracting more attention of a worker so as to carry out corresponding operation. Moreover, an integrated circuit in an audio output circuit is low in power consumption, is large in power voltage range, and is low in distortion, thereby improving the practicality and reliability of the audio output circuit. Meanwhile, the cabinet is small in number of external elements, reduces the production cost, and improves the market competiveness.

The invention provides a novel underground motor drive circuit, and belongs to the field of drive control of logging instruments for an oil well, a gas well and a water well and various intelligent underground tool motors. The novel underground motor drive circuit is an H type circuit, which comprises a logical control circuit and a dual-bridge circuit conducting circuit, wherein the logical control circuit comprises a positive rotating control circuit and a negative rotating control circuit; the dual-bridge circuit conducting circuit comprises an A bridge circuit drive output circuit and a B bridge circuit drive output circuit; a motor is driven via the A bridge circuit drive output circuit or the B bridge circuit drive output circuit; the motor is positively rotated and negatively rotated or stopped by adding different negative working voltages, so as to control a current collecting umbrella to be opened and closed. With the adoption of the novel underground motor drive circuit, the contact change-over can be saved; a well can be measured with a plurality of parameters; the novel underground motor drive circuit is wide in the scope of power supply voltage, simple in operation, and reliable in work, and has the capacity of providing higher working voltage and larger driving current to the motor under a high temperature condition; and the novel underground motor drive circuit is suitable for being applied to controlling the drive of the logging instruments for the oil well, the gas well and the water well and various intelligent underground tool motors.

The invention discloses a power tube driving integrated circuit. The signal input terminal of the integrated circuit is in connection with a control unit so as to receive the driving signal of driving a power tube from the control unit; and the signal output terminal of the integrated circuit is in connection with the power tube so as to connect / disconnect the power tube under the effect of the driving signal, wherein the signal input side of the integrated circuit is provided with a control earth terminal in electric connection with the ground wire of the control unit; and the signal output side is provided with a power earth terminal in electric connection with the emitter or source of the power tube. The power tube driving integrated circuit integrates discrete devices on a single IC, thereby reducing peripheral device costs, and improving the reliability of a whole machine; even more important, the signal input side and the signal output side are respectively provided with an earth port for connecting with the control unit and a driven power tube; the control earth terminal and the power earth terminal are separated, thereby effectively obtaining a smooth driving power tube conduction curve.

The invention relates to the technical field of electronic equipment, and provides a control chip, a control device and electronic equipment. The control chip comprises a wireless communication bare chip supporting a first power supply voltage to the maximum and a micro-control unit bare chip maximally supporting a second power supply voltage, being connected with the wireless communication bare chip so as to communicate with the wireless communication bare chip and supply power to the wireless communication bare chip; the first power supply voltage is the same as or different from the second power supply voltage. And the micro-control unit bare chip and the wireless communication bare chip are packaged into a system-on-chip. The control chip has the advantages of being high in integration level, small in occupied space, low in cost and capable of supporting a relatively wide power supply voltage range, and then the applicability of the control device is improved.

The invention relates to a practical device for expanding an input voltage range of a small-power switch power supply. The practical device comprises an overcurrent protection circuit, a power line filtering circuit, a rectification circuit, an overvoltage detection and negative resistance generation circuit, a voltage-limiting chopping circuit, a diversion and reverse blocking circuit and a filtering energy storage circuit, wherein a front end of the power line filtering circuit is connected with the overcurrent protection circuit, a rear end of the power line filtering circuit is connected with a front end of the rectification circuit, a rear end of the rectification circuit is connected with the overvoltage detection and negative resistance generation circuit and the voltage-limiting chopping circuit, a rear end of the overvoltage detection and negative resistance generation circuit is connected with a control end of the voltage-limiting chopping circuit, a rear end of the voltage-limiting chopping circuit is connected with the diversion and reverse blocking circuit, and a rear end of the diversion and reverse blocking circuit is connected with the filtering energy storage circuit. The practical device has the advantages of stable and reliable performance, universality, low cost and low self power consumption, the whole power system becomes more stable and reliable and is more universal, the practical device can be completely fused into the small-power switch power supply and can also be used as a preposition device of the small-power switch power supply, so that the voltage supply range of a conventional small-power switch power supply is expanded to be AC85V-AC440V and even wider.

The invention discloses a low-consumption optical module, and a realization method and a realization circuit thereof. The realization method comprises the following steps: reading output voltage of a system power supply which powers the optical module; reducing the output voltage into a low voltage which is required to ensure the normal operation of a function circuit unit of the optical module; and sending the low voltage as the supply voltage to the corresponding function circuit unit. The realization method has the advantages of simplicity and low cost, and is easy to apply in the optical module.

The invention relates to a non-isolation step-down LED drive circuit capable of adaptive power supply and a working method. The non-isolation step-down LED drive circuit comprises a rectification filter circuit and a control module, wherein the power supply end of the control module is connected with the output end of the rectification circuit through a resistor. An adaptive power supply circuit is arranged in the control module. The adaptive power supply circuit comprises a microprocessor unit, a step-down unit, a plurality of Pn junctions connected in series and an analog switch unit. The output end of the step-down unit is connected with the input ends of the Pn junctions in series, and the output end of the step-down unit serves as the voltage output end of the adaptive power supply circuit. Nodes are arranged among the Pn junctions, the nodes are connected with the switch input ends of the analog switch unit respectively, and the switch output ends of the analog switch unit are connected with one another and connected to the ground through a resistor. The power supply end of the processor unit obtains sampling voltage, and the control output ends of the processor unit are respectively connected with the control end of the analog switch unit.

The invention discloses a waterproof and antibacterial perforated graphene eyeshade. The eyeshade comprises an eyeshade body and eyeshade bandages, wherein the eyeshade body comprises a nano-silver coating film with an antibacterial effect, first acetate cloth, an FPC flexible circuit board, second acetate cloth and a nano waterproof coating from inside to outside; graphene heating coatings are laid on the upper surface of the FPC flexible circuit board, the graphene heating coatings are olive-shaped and distributed at the positions of the two eye sockets, and the graphene heating coatings arelocated at the upper end and the lower end of the eyeshade and connected to the positive electrode and the negative electrode of the power source through the FPC flexible circuit board. The hook-and-loop fastener velvet and a hook-and-loop fastener hook are sewn at the two ends of the eyeshade bandages respectively, the width of the hook-and-loop fastener velvet is 3-4 times that of the hook-and-loop fastener hook, a nose pad is arranged at the position, corresponding to the nose bridge, of the eyeshade body, the good plasticity is achieved, and a buffering pad is bonded to one face of the nose pad. The eyeshade has the advantages of being convenient to carry and wear, good in water resistance, free of bacterium breeding, and definite in physical therapy effect and the like.

The invention relates to an RC oscillating circuit and an RC oscillator. The RC oscillating circuit comprises a biasing circuit and an oscillating unit which are connected in sequence; the biasing circuit comprises a first-stage self-adjusting loop and a second-stage self-adjusting loop; the first-stage self-adjusting loop comprises a first voltage drop unit and a first negative feedback circuit; the first negative feedback circuit adjusts the voltage value of the power supply voltage processed by the first voltage drop unit and outputs a negative feedback voltage; the second-stage self-adjusting loop comprises a second voltage drop unit and a second negative feedback circuit; and the second negative feedback circuit adjusts the voltage value of the negative feedback voltage processed by the second voltage drop unit and outputs oscillation voltage used for supplying power to the oscillation unit. The structure of the biasing circuit is simplified, the self-adjusting capacity of the biasing circuit is improved, the purpose of a low-power-consumption high-precision voltage self-adjusting oscillator is achieved, the output frequency precision of the RC oscillator is improved, and circuit integration and multi-occasion application are facilitated.

The invention discloses a power supply device with an efficient charge function and controllable voltages for series supercapacitors. The power supply device comprises light-control current direction switches, the supercapacitors, a charge terminal, a charge diode, a charge ground diode, a charge ground terminal, a high-potential power leading-out terminal, AD (analog-digital) sampling divider resistors, a power supply terminal, a power supply ground terminal and a single chip microcomputer module. The power supply device has the advantages that output voltage set values of users can be received by a single chip microcomputer serial port, the highest voltages of the first-stage supercapacitor, the lowest voltages of the last-stage supercapacitor, power supply voltages and charge voltages are acquired, rated voltages of the supercapacitors are compared to the output voltage set values of the users, accordingly, the corresponding light-control current direction switches can be selected and controlled, supercapacitor charge procedures and power supply procedures can be carried out, and the purposes of efficiently charging the supercapacitors and supplying power with the controllable voltages can be achieved.

The invention provides an operational amplifier and an output stage circuit thereof, the output stage circuit can utilize an output transistor pair to provide an output voltage, respectively access an intermediate signal and the output voltage provided by a preceding stage circuit through an input transistor pair, utilize a bias voltage generator to obtain the circuit state of the input transistor pair, and generate a first bias voltage and a second bias voltage and respectively provide the first bias voltage and the second bias voltage to the control end of the output transistor pair, wherein the bias voltage generator is used for forming a feedback control loop of the output voltage by using the input transistor pair so as to realize transient response of the output voltage to load change. Therefore, the power supply voltage range of the output stage circuit can be expanded, the output impedance of the output stage circuit can be reduced, and the transient response speed to a load and the stability of the circuit can be improved.

The invention relates to an intelligent transfer system for industrial production. The intelligent transfer system comprises a transfer mechanism and a wireless communication terminal. The wireless communication terminal is in wireless connection with the transfer mechanism. According to the intelligent transfer system for industrial production, a driving motor controls a driving gear to move on driven teeth, equipment makes a conveying assembly to move in a horizontal position through a driving rod at the moment, a transmission gear rotates and moves on transmission teeth simultaneously, a transmission rod with a thread is made to rotate in a guide sleeve, movement in the horizontal direction and the vertical direction can be achieved through only one set of motor, in this way, the cost of the whole system is reduced, and the practicability of the equipment is improved; and more than that, in a signal amplification circuit, the type of an operational amplifier is OP90, the operational amplifier has the characteristics of being low in power consumption and broad in power voltage adaptive range, thus, the power consumption of the wireless communication module is reduced, and the practical value of the system is improved.

The invention discloses a three-wire series connection type electronic water gauge circuit. The circuit is composed of multiple stages of water level detection sub-circuits which are arranged in series at equal intervals in a cascade mode, a voltage division circuit, a microprocessor and the like. Eachwater level detection sub-circuit is composed of a PMOS transistor, a resistor, a detection electrode and a common electrode. The fact of whethera water body makes contact with a detection electrode or not is used for deciding connection and disconnection of a PMOS tube, then whether a low-impedance path is provided for detection signal transmission or not is determined, multi-stage series transmission is conducted, finally, a microprocessor MCU conducts analog-digital conversion through AD to obtain a voltage value, the voltage value is compared with reference voltage, and water level information is obtained. The three-wire system replaces the conventional four-wire system, an analog signal replaces a digital signal, the circuit has the characteristics of ultra-low power consumption, wide power supply voltage range, wide working temperature range, light weight, small size, high response speed, high interference resistance, high corrosion resistance and the like, IP68 can be achieved through waterproof treatment of soft pouring glue, and the flexible electronic water gauge is further processed.

The invention discloses a reference source and an integrated circuit thereof. The reference source comprises a starting loop, a mirror current source, a bias loop and a band-gap voltage source; the starting loop receives power output by a power supply and provides a starting bias current; the mirror current source provides two constant bias currents according to the starting bias current; the biasloop comprises a plurality of transistors, and the plurality of the transistors provide two constant bias voltages according to the two constant bias currents; and the band-gap voltage source outputsa reference output voltage according to the two constant bias currents and the two constant bias voltages.

The invention discloses an electronic system and a power-on and power-off state detection circuit therefor. The electronic system includes a main circuit and an IO interface circuit, and the power-onand power-off state detection circuit comprises a first level converting circuit, wherein the power voltage of the main circuit is inputted into the first input end of the first level converting circuit, and the power voltage of the IO interface circuit is inputted into the second input end of the first level converting circuit. The first level converting circuit is suitable for the level conversion of the power voltage of the main circuit to generate a power-on and power-off detection signal, wherein the power-on and power-off detection signal is within a power domain defined by the power voltage of the IO interface circuit. According to the scheme of the invention, the system can effectively detect the power-on states of the main circuit and the IO interface circuit and also can effectively detect the power-off state of the main circuit. Moreover, the system is lower in leaked current, is wider in power voltage application range, and is smaller in circuit area.

The invention discloses a double-base-island chip driving circuit, a chip, a constant-current driving circuit and a control method. The double-base-island chip driving circuit comprises a first current source, a second current source, a change-over switch and a control circuit, wherein one ends of the first current source and the second current source are mutually connected, and the other ends are respectively connected with the outside; the control circuit is used for detecting current or voltage parameters in the circuit and controlling the switching-on or switching-off of the change-over switch and the first current source; the first current source, the second current source and the control circuit are arranged on a carrier; two ends of the change-over switch control opening or closing of an access formed by connection of two external ends, and the change-over switch is arranged on the other carrier. Through the arrangement of the double base islands, chips are integrated, stable and efficient power supply is provided for an LED device, chip cascading is facilitated, high-power driving support can be provided, the adaptable power supply voltage range is wide, and the power supply efficiency is high.

The invention discloses a container energy storage variable-frequency air conditioning unit for a direct-current power supply ship. The air conditioning unit comprises a direct-current power supply access port and a compressor module. The direct-current power supply access port is electrically connected with the compressor module, the compressor module comprises a compressor and a direct-current to alternating-current conversion device electrically connected with the compressor, and the direct-current to alternating-current conversion device is used for converting a direct current into an alternating current and transmitting the alternating current to the compressor. The direct-current power supply access port is arranged to access a direct-current power supply to the air conditioning unit, and the direct-current to alternating-current conversion device is arranged to convert the direct current into the alternating current and transmit the alternating current to the compressor so thatpollutant emission is effectively reduced, and a noise is low; and the alternating current output by the direct-current to alternating-current conversion device is only supplied to the compressor so that the demand for the alternating current is small, the size of the corresponding direct-current to alternating-current conversion device is small, the direct-current to alternating-current conversion device can be integrated in the air conditioning unit, independent arrangement is not needed, a space of the container is not occupied, and a space utilization rate of the container is effectively increased.

The invention relates to a DTU wireless terminal device for communication network engineering. The wireless terminal device comprises a main body and two fixing blocks, two fixing blocks are respectively arranged at two sides of the main body, the frontage of the main body is provided with a cable interface, a data line interface, a power line interface, a switch and an indicator lamp; the back of the main body is provided with a line-connecting mechanism, a connecting rod and an antenna; the line connecting mechanism is provided with a plurality of line connecting units; through the adoption of the DTU wireless terminal device for the communication network engineering, an opening is formed on the top of the main body in the process of moving a glass plate to a clamping plate in a radiating mechanism, thereby emitting the heat in the main body to achieve the cooling effect and guarantee that the internal component is in a proper temperature environment; not only that, the model of an operation amplifier is OP07 in a voltage transformation circuit, the device has the features of being low in drifting, low in noise, hyper in stability, and wide in power voltage range, thereby improving the stability and the reliability of the voltage transformation circuit.