283results about How to "Stable and reliable output" patented technology

The invention discloses a power supply device of a current transformer (CT). The power supply device comprises the CT, a first bridge type rectifier circuit, a surplus current relief switch, a diode, an LC (inductor-capacitor) filter circuit, an input voltage sampling circuit, a reference voltage forming circuit, a return difference comparing circuit, a drive circuit and an isolation high-frequency switch pulse width modulation DC/DC conversion multi-output voltage-stabilized power circuit. According to the power supply device, surplus current output by the CT is relieved by adopting an electronic switch, required energy is extracted from the CT intermittently, so that output overvoltage of the CT is limited, and the CT is prevented from saturating. Electricity taking voltage is increased by adopting a high-voltage input high-frequency switch power supply technology, thus the output current of the CT is reduced, heating of the CT and the rectifier circuit and the relief switch behind the CT is decreased, and the electricity taking efficiency is increased.

A composite cylinder jacket is featured as using alloy cast ¿C iron layer as internal layer of cylinder jacket and using cast ¿C steel layer as external layer, setting pure copper combination layer between alloy cast ¿C iron layer and cast ¿C steel layer for connecting these two layers. Its preparing method is the same to cold processing technology, heating and chemical treatment technique and outline size in method for preparing universal cylinder jacket in addition to casting technique.

The invention relates to a high voltage power supply for a direct current characteristics test of a zinc oxide arrester, comprising a control circuit module, a PWM generator, an MOSFET driver and a power tube, a high frequency transformer, a protective circuit and a voltage doubling rectifying circuit, wherein the low voltage output end of high frequency transformer is connected with a sampling resister, a current measurement terminal and a current feedback circuit; the output end of the voltage doubling rectifying circuit is connected with a voltage divider, the voltage measurement terminal and the voltage feedback circuit; the control circuit module is provided with a constant voltage control circuit, a constant current control circuit and a cascaded constant voltage/constant current change-over switch; the signal of the feedback circuit is compared with a set signal value, is input in an error amplifier in the constant current control module and enters into a closed loop control system to ensure stable output signals. The invention has stable performance, reliably operates among two modes of constant voltage and constant current, has a built-in protective circuit and can ensure power supply safe operation.

The invention provides an artificial pancreas closed-loop control algorithm and artificial pancreas using the method. The method mainly comprises the following steps: constructing an autoregressive model that an insulin absorption delay factor is actively introduced; calculating required insulin infusion amounts respectively via the autoregressive model and a PID algorithm; and implementing loop optimization of parameters of the two insulin infusion amounts via an average value of calculation results of the two insulin infusion amounts, so as to offer more accurate blood glucose trend prediction and a more appropriate insulin infusion amount.

The invention relates to a control method for an intelligent valve positioner, which has simple and rapid debugging. The technical scheme is that a singlechip receives a set signal sent by a controller and a feedback signal transmitted by a valve position sensor; the set signal is compared with the feedback signal; a bias is subjected to adaptive PID control; a corresponding PWM signal is output to drive an I/P converting unit; and an executing mechanism is driven by a pneumatic power amplifier.

The invention provides a DVD player (100) as a signal source device generating video signal and an audio signal and outputs them to a plasma display device (200) as a signal synchronization device. After equipment authentication between the DVD player (100) and the plasma display device (200) has been completed, the DVD player outputs video signal and an audio signal through transmission lines conforming to HDMI standards to the plasma display device (200) after a predetermined waiting time has elapsed, the waiting time being set to be longer than the time required for an initial startup setting process in the plasma display device (200).

The invention discloses a wide-range voltage regulation circuit and a method for realizing wide-range voltage regulation. The circuit comprises a control circuit, a voltage reduction conversion unit and a voltage boost conversion unit, wherein the control circuit respectively outputs control signals and is connected with the voltage reduction conversion unit and the voltage boost conversion unit which share the busbar voltage; and the output end of the voltage reduction conversion unit is connected with the output end of the voltage boost conversion unit. The wide-range voltage regulation circuit and the method for realizing wide-range voltage regulation adopt the voltage reduction conversion unit to realize low-voltage section and the voltage boost conversion unit to realize high-voltage section, synthesize low-voltage output and high-voltage output into a path which is then outputted to a transmitting circuit for power supply, further realize flexible switching between a low-voltage circuit and a high-voltage circuit through boosting charge for the voltage boost conversion unit in advance, so as to avoid large impact current when the low-voltage circuit is switched to the high-voltage circuit, and avoid damage to devices or voltage sag of the busbar.

The invention relates to a blind multipath identification method for an MIMO system based on a weighted integrated clustering algorithm. The method comprises: multiple user sides sending communicationrequest signals to a base station; the user side adjusting the transmitting power of the user side based on the response signal fed back by the base station, so that the base station allows the communication request of the user side; the user side sending an information signal to the base station; the base station generating an input signal of a basic clustering algorithm based on the separated information signal, based on the output result of each basic clustering algorithm, the base station adaptively adjusting the weight of the output result of each basic clustering algorithm through the weighted integrated clustering algorithm, and identifying the path of the information signal of the user side according to the output of the weighted integrated clustering algorithm; and the base station combining the maximum ratio of each user side and decoding the information signal of each user side. According to the method, multipath identification can be stably and effectively carried out based on a weighted integrated clustering algorithm.

The invention discloses a quick charging system and method for power batteries of electric cars. The system comprises a fault protection module, the input end of the fault protection module is connected with the output ends of a power-frequency alternating-current input grid and a digital signal processor, the output end of the fault protection module is connected with an input rectifying and filtering module, a direct-current signal then passes through a half-bridge inverter circuit to transmit stored energy to a high-frequency transformer via opening of switch tubes, a full-wave rectifying circuit converts pulsed voltage outputted by the high-frequency transformer into direct-current voltage which is transmitted to an output direct-current filter circuit, the output direct-current filter circuit filters out smooth direct current flowing into an electric car battery load, and the electric car battery load is connected with the output end of the fault protection module through a depolarization module. By the system and method, quick charging to the power batteries is realized, battery polarization can be removed effectively, efficiency of a charger is improved by an energy recovery circuit, and service lives of the batteries are prolonged.

The invention relates to an optimizing time synchronizing device for multi-channel clock sources. The optimizing time synchronizing device comprises at least two units identical in structure. In every unit, a global positioning system ground receiver (8) is connected with a counter (7), the counter (7) is further connected with a comparator (6) in the unit, a high-stability crystal oscillator (1) is directly connected with the counter (7) in every unit or connected with the counter (7) in every unit through a phase-locking frequency multiplier (2), and the comparator (6) in every unit is respectively connected with one input end of a multiplexer (4). The counter (7), the comparator (6) and a register (5) in every unit are respectively connected with a single chip microcomputer (3), and the output end of the single chip microcomputer (3) is further connected with the multiplexer (4). The optimizing time synchronizing device has the advantages that the comprehensive cost is low, algorithm adaptability is high, optimization of the multi-channel clock sources is supported, various time difference compensation strategies are supported, high-precision punctuality can be achieved, and time signal output is stable and reliable, and the like.

The invention discloses an ignition control circuit of a downhole electric detonator for perforation. The ignition control circuit comprises a wide-input-range power supply voltage stabilizing circuit, a signal detection and processing circuit and an ignition selecting switch circuit, wherein the wide-input-range power supply voltage stabilizing circuit is used for stabilizing voltage and then outputting direct current of 10V and direct current of 5V when direct current of 20-40V is input to a downhole ignition control circuit by a ground system through a single-core cable, so as to supply power to the signal detection and processing circuit and an ignition switch circuit; the signal detection and processing circuit is used for receiving ignition control commands from the ground system, controlling the connection/disconnection of the ignition selecting switch circuit according to the commands and controlling the detonation of the electric detonator; the ignition selecting switch circuit is used for being connected with the electric detonator. The ignition control circuit has the advantages that the circuit access of the downhole electric detonator during detonation can be realized safely and reliably, meanwhile, the detonation circuit access of the electric detonator resulting from accidental circuit conduction can be prevented, and the effect of protecting and igniting a detonation circuit can also be exerted under the extreme cases that the detonation circuit is short-circuited.

The invention discloses a continuously adjustable drive source device of a small-power semiconductor laser. A power source has the function of current slow-change protection, and an output current slowly rises to a working current of a laser diode when the power source is opened, thereby avoiding the condition that the power source is suddenly opened to generate an overlarge positive current gradient so as to break a semiconductor laser. When the power source is closed or the outside suddenly has power failure, the power source can still continuously supply the power to the laser diode, and then the current is slowly reduced to zero, thereby avoiding the condition that the power source suddenly has failure to generate an overlarge negative current gradient so as to break the laser diode. In addition, the power source further has the functions of reverse protection and maximum and minimum working current limitation. In the invention, the device can provide continuously adjustable, stable, reliable and constant drive current with strong resistance to interference for the small-power semiconductor laser; and the device can continuously adjust the output current within 10-100mA as required, and the current ripple peak value is not larger than 0.5% within 10-100mA output range.

The invention relates to an automatic pipe bender for stainless steel pipes and a bending method thereof. The automatic pipe bender comprises a base, a bending frame, a bending head assembly, a bending seat and a bending driving device, wherein the bending frame is installed on the base, the bending head assembly is fixed to the upper end of the bending frame, the bending seat can vertically slide on the bending frame, the bending driving device is used for driving the bending seat, the bending head assembly comprises a bending head fixed seat which is fixed to the upper end of the bending frame and a bending head which is fixed to the lower part of the bending head fixed seat, and a steel pipe bending groove is formed in the lower end of the bending head; the bending seat comprises a V-shaped bending fixed seat which is installed on the bending frame in a sliding mode through vertical guide wheels on both sides, and a plurality of bending abutting rods are arranged on the V-shaped bending fixed seat; and a steel pipe feeding device, an elbow taking device and an elbow output device are further installed on the base. The automatic pipe bender has the advantages of high bending accuracy, high bending stability, high bending efficiency and low labor intensity.

The invention relates to a voltage surge detection circuit, which comprises a rectification circuit, a surge detection circuit and a zero-cross detection circuit, wherein an input end of the surge detection circuit and an input end of the zero-cross detection circuit are respectively connected with the rectification circuit, an output end of the surge detection circuit is connected with an output end of the zero-cross detection circuit, and alternating current mains supply is converted into direct current mains supply by the rectification circuit. A mains supply alternating current voltage signal is detected by the surge detection circuit disclosed by the invention, and if the mains supply alternating current voltage signal has the surge phenomenon, the circuit takes effect, and the output surge signal is a high-level signal. The signal triggers subsequent surge protection circuits to work, and related power components are protected against damage. If the mains supply alternating current signal does not have the surge phenomenon, the output surge signal is a low-level signal. The surge phenomenon in a circuit can be accurately detected by the voltage surge detection circuit, so that a semiconductor power component in a circuit system can be effectively protected.

The invention belongs to the technical field of emergency information management and discloses a multi-disaster-point emergency rescue command and control organization resource scheduling method and amulti-disaster-point emergency rescue command and control organization resource scheduling system. The method comprises steps that a mission needing to be handled is organized according to emergencyrescue command control; an evaluation measure of resource scheduling is established; a resource scheduling model of a single rescue task is constructed by utilizing evaluation measure, a solving method capable of solving a resource scheduling problem of multiple serial rescue tasks is designed, an emergency rescue command and control organization centralized task planning technology is provided, and a problem of how to plan and use an available rescue platform of an emergency rescue decision entity is solved. The method is advantaged in that objects processed by the emergency rescue command and control organization are all subtasks of a rescue area, the core of the invention is to realize reasonable matching between the rescue platform and the rescue task, achieve the purpose of meeting the task demand to the maximum extent, and ensure the completion of the rescue task; a stable and reliable resource scheduling scheme is outputted through a heuristic optimization method.

A semiconductor laser device which has a diffraction grating partially provided in the vicinity of an active layer formed between a radiation-side reflection film provided on a radiation-side end surface of a laser beam and a reflection film provided on a reflection-side end surface of the laser beam, and which outputs a laser beam having a desired oscillation longitudinal mode based on a wavelength selection characteristic of at least the diffraction grating. The diffraction grating is formed in isolation with an isolation distance of Ls=15 μm from the radiation-side reflection film.

The invention discloses a control circuit system of an electronic bird dispeller. The control circuit system comprises a multi-resonant oscillating circuit, a boosting circuit, a voltage stabilizing circuit, a low-frequency oscillating circuit, an electromagnet control circuit and a power supply GB, wherein the multi-resonant oscillating circuit comprises a NOT gate circuit D1, a NOT gate circuit D2, a capacitor C1 and a resistor R1; the boosting circuit comprises a transistor V1, a boosting transformer T, a rectifier diode VD1, a resistor R3, a polar capacitor C2 and a capacitor C3; the low-frequency oscillating circuit comprises a NOT gate circuit D3, a NOT gate circuit D4, a NOT gate circuit D5, a NOT gate circuit D6, a resistor R7, a capacitor C4 and a diode VD2; the electromagnet control circuit comprises a transistor V2, a relay K and an electromagnet YV. With use of such a structure mentioned above, the control circuit system of the electronic bird dispeller disclosed by the invention can effectively reduce energy consumption of the bird dispeller, especially a sound bird dispeller, prolong a service life of the bird dispeller, and simultaneously enable a working status of the bird dispeller to be steadier.

The invention discloses a device and a method for obtaining energy from a high voltage transmission line, and belongs to the technical field of high voltage technologies and power source technologies.The device comprises a high-voltage capacitor, a first-stage step-down transformer, a bidirectional thyristor module, a rectifier module, a filter capacitor, a voltage monitoring module, a thyristordrive module, a DC/DC voltage regulator module, an overvoltage suppression module and a shielding box. The principle of capacitance voltage division is employed, the high-voltage capacitor set is connected in series with the primary side of the transformer to effectively improve the output power of the device for obtaining energy, two-stage voltage reduction is employed to reduce the insulation design requirement of the transformer and reduce the size of the transformer. The wiring mode is flexibly configured between the high-voltage capacitor and the first-stage step-down transformer to achieve energy obtaining at a high level end between a phase and a ground and a low level end between the phase and the ground and between phase and phase, and the device and the method for obtaining energy from the high voltage transmission line can supply power for various electric devices.

The invention discloses a three-dimensional ultrasonic vibration cutting working head. The three-dimensional ultrasonic vibration cutting working head comprises an X ultrasonic vibrating arm, a Y ultrasonic vibrating arm and tool bits, wherein the front tool bit of the X ultrasonic vibrating arm is connected with the front tool bit of the Y ultrasonic vibrating arm. The frequency, vibration amplitude and phase of three energy converters of the power type three-dimensional ultrasonic vibration cutting working head can be separately controlled and also can be controlled in a linkage manner, so that the working head realizes control over the vibration shift of the tool in X, Y and Z directions.

The invention relates to an electronic speed regulator and actuator drive circuit for diesel engine duplicated hot-redundancy. The electronic speed regulator and actuator drive circuit for the diesel engine duplicated hot-redundancy is composed of a controller end drive circuit part and a drive adapter plate. The controller end drive circuit comprises a first optical coupler, a first MOS tube, a first voltage stabilizing diode, a second freewheel diode, a first divider resistor, a fourth divider resistor, a second current-limiting resistor and a third current-limiting resistor. The drive adapter plate comprises a drive circuit part and a logic control circuit part. The drive adapter plate end drive circuit comprises a second MOS tube, a third MOS tube and a fifth coil drive selective chip. The core of achieving the fault loop passive cutting-out function is edge D triggers and eight-to-one data selectors, and reliable output of a control loop can be guaranteed through the latch function of the edge D trigger. A control circuit of a control adapter part is achieved through a simulator, and reliability is high.

The invention discloses a full redundancy merging unit apparatus. Full redundancy design of hardware and a data processing unit enables outputting of a redundant sampling value SV to a protective relaying apparatus. The protective relaying apparatus effectively determines the presence of abnormity through redundant processing on SV, prevents protective maloperation caused by damage of any element or abnormity of any software module under a single system, and at the same time can find faults of the apparatus in time, sounds alarm in time and conducts maintenance, and guarantees that program operation and data output are reliable. The merging unit apparatus can be directly applied to process level devices applied to engineering.