77results about How to "Safe isolation" patented technology

First and second through-side field effect transistors are connected between first and second high frequency signal input / output terminals, and an antenna, respectively. The first and the second high frequency signal input / output terminals are connected with one end of the first and the second shunt-side field effect transistors, respectively. A series resonant circuit including a shunt capacitor and a bonding wire is connected between the other end of the first and the second shunt-side field effect transistors, and a ground.

A high impedance fault isolation system (HIFIS) identifies, isolates and dissipates high impedance, low current faults which occur within an individual tap, or branch, of an electric power distribution system using only portions of the tap affected. A master meter, or father smart meter (FSM), on the affected tap sends a coded signal to an antenna receiver combined with a microprocessor and chip which operates an electromagnetic control (EMC) grounding spring switch which isolates the downed primary conductor by causing the distribution system protecting device, i.e., a high voltage fuse or recloser, to de-energize the downed primary wire. This localized application of the HIFIS at the individual tap level allows the FSM to analyze and determine, for example, that the specific field condition is a “downstream wire down”, and that the installed isolating device has failed to operate because of insufficient fault current, allowing the localized intervention of the HIFIS to achieve the de-energization more efficiently and safely, and within a much shorter time period. A fire door sensor circuit then receives the trip signal from the microprocessor, causing the fire door sensor to melt open and release a shorting spring, in initiating operation of an expulsion fuse or recloser, which kills the downed live wire.

An electrical control system for fixtures, devices and appliances that safety isolates a power source using the features of the safety block, and consolidates multiple control points to remotely activate a combination of fixtures, devices and appliances using the features of the control module, thereby promoting safety and facilitating energy conservation. The system has a safety block where a safety-block AC power supply connector on the rear attaches to a household alternating current (AC) power supply. The safety-block AC power supply connector passes through a cavity to the safety-block AC power transfer connector located on the front. The system also has a control module with a control-module user interface on the front. A control-module AC power connector connects to the control-module user interface and passes through the control-module cavity to connect to the safety-block AC power transfer connector located on the front of the safety block.

The invention discloses a compatible cloud operating platform and a realizing method thereof. The compatible cloud operating platform comprises a management server cluster connected with a user terminal, wherein the management server cluster is connected with a management information storage server cluster and a proxy server cluster through a network cable via a local area network or an Internet, and the storage server cluster comprises more than two management information storage servers containing information of the proxy server cluster and information of the user terminal. The compatible cloud operating platform and the realizing method thereof effectively overcome the defects that management modules cannot coexist, high availability cannot be met, and one-button deployment of virtual machine applications, monitoring for virtual machine resources and virtual machine applications, and simultaneous management of a virtual machine and a physical machine are not supported in the prior art.

A portable air heating system for use in remote areas is disclosed. The portable air heating system provides a stream heated air for use in heating the interior of a structure, such as a tent or camp trailer. The heating system generally comprises an air transfer assembly for providing a flow of air through the system, a fuel burner assembly for providing heat by combustion, and a heat transfer housing for safely transferring the heat produced by the fuel burner assembly to the air flowing through the transfer assembly. The burner assembly and the heat transfer housing are both positioned outside the area being heated. Further, the exhaust gases are completely isolated from the air heated by the system, thereby virtually eliminating the likelihood of asphyxiation by the exhaust gases from the burner. The present heating system is also highly portable and simple to use, thereby providing an efficient mechanism for providing heat where more traditional heating apparatus are not readily available.

A power conversion device is disclosed herein. The power conversion device includes an AC / DC converter, a DC / DC converter, and a DC / DC isolation converter. The AC / DC converter is configured to convert AC power into a first DC power, or convert the first DC power into the AC power. The DC / DC converter is configured to convert the first DC power into a second DC power, or convert the second DC power into the first power. The DC / DC isolation converter is coupled between the AC / DC converter and the DC / DC converter, and configured to isolate the AC / DC converter and the DC / DC converter bi-directionally.

A motor controller, including: a control box including an inner wall; a circuit board; a dissipater; an IGBT module; and an insulating piece. The circuit board is disposed inside the controller box. The dissipater is disposed on the inner wall of the control box. The IGBT module is disposed on the dissipater and is in electric connection with the circuit board. The insulating piece is disposed between the dissipater and the controller and prevents the dissipater from contacting with the control box.

The invention discloses an optical fiber isolating multi-tube serial high-voltage amplifier and an application method thereof, and belongs to the technical field of material high voltage testing. The optical fiber isolating multi-tube serial high-voltage amplifier has the following structure that: an analog-to-digital conversion circuit is serially connected with an optical fiber transmission circuit; the optical fiber transmission circuit is connected with a first optical fiber receiving circuit through a first optical fiber and is connected with a second optical fiber receiving circuit through a second optical fiber; the first optical fiber receiving circuit, a first analog-to-digital conversion circuit, a first signal processing circuit and an upper bridge arm on a high voltage working circuit are connected in series in sequence; and the second optical fiber receiving circuit, a second analog-to-digital conversion circuit, a second signal processing circuit and a lower bridge arm on the high voltage working circuit are connected in series in sequence. The amplifier has the beneficial effects of high output voltage, wide output signal frequency, safe and reliable optical fiber isolation and small equipment size, and can be widely applied to various high voltage testing occasions of high voltage piezoelectric material testing, high voltage insulation testing, strong electric field construction and the like.

A wireless sensor apparatus controls, in a case where wireless waves are radiated by feeding pulse signals generated by a signal generation circuit to antennas, an operation timing of the signal generation circuit and a path from the signal generation circuit to the antennas in such a manner that after a prior pulse signal is fed to the antenna and simultaneously supplied to a mixer circuit, at a proximate timing which does not overlap with a pulse width of the prior pulse signal supplied to the antenna and the mixer circuit, a next pulse signal is fed to the antenna and simultaneously supplied to a mixer circuit.

The invention relates to a combustion heat supply system taking biomass as a fuel. The combustion heat supply system comprises a combustion boiler, a flue gas emission device and an air supply device, wherein the flue gas emission device comprises a separator and a convection bank; the lower part of the convection bank is provided with a coal economizer, a flue gas primary cooler, a flue gas purifier, a flue gas deep cooler and a chimney; an inlet of a water flow pipeline positioned in the flue gas deep cooler is connected with a water source to be heated, and an outlet of the water flow pipeline passes through a deaerator and then is connected with water flow pipelines which are positioned in the flue gas primary cooler and the coal economizer; an outlet of the water flow pipeline positioned in the coal economizer is connected with a water inlet of a steam pocket; an water outlet of the steam pocket is connected with a water heating device positioned in the combustion boiler; a water heating device positioned in the combustion boiler is connected with a steam inlet of the steam pocket; a steam outlet pipe of the steam pocket is connected with a steam supply pipe. The combustion heat supply system taking the biomass as the fuel, which is disclosed by the invention, has the advantages of high heat supply efficiency and little environment pollution.

The invention provides a bridging device used for storage batteries. The bridging device belongs to the field of power equipment, and comprises a controller U1 and a power supply unit, wherein an input end of the controller U1 is connected with a reference voltage unit and a measuring unit, and an input end of the measuring unit is connected with a battery short-circuit unit; an output end of thecontroller U1 is connected with an optocoupler isolation driving circuit, and an output end of the optocoupler isolation driving circuit is connected with the battery short-circuit unit; the battery short-circuit unit comprises a thyristor VS; and the power supply unit supplies power to the bridging device. According to the bridging device, the optocoupler isolation driving circuit drives the thyristor VS after determining that an anode and a cathode of the thyristor VS are normally connected with positive and negative electrodes of a measured storage battery by means of the controller U1, sothat the storage battery pack can continue to maintain operation of a DC system by means of the thyristor VS, the measured storage battery is safely isolated, and the purpose of putting a new storagebattery into operation after safely removing or replacing the measured storage battery without affecting a continuous power supply state of the DC system is realized.

A fire and gas detection system, which has a bidirectional communication function and is to be installed in a dangerous region, according to the present invention, comprises: a first terminal block and a second terminal block; a +line and a −line; a first loop line wherein a part of a loop shape thereof is arranged to extend over a dangerous region having a relatively high dangerousness of disaster occurrence and the other part of the loop shape is arranged in a safe region other than the dangerous region, and a second loop line arranged in parallel to the first loop line in the same shape; a first connection line and a second connection line; a barrier which is installed in the first connection line and the second connection line and disconnects the first connection line and the second connection line when short-circuiting between the first loop line and the second loop line is detected; a sensor connected to the first loop line and the second loop line inside the dangerous region; and a CPU which simultaneously controls the first and second terminal blocks to modulate and output call information designating a sensor at a first voltage and demodulate detection information from a second voltage, and performs fire and gas detection warning processing in accordance with the demodulated detection information.

The invention discloses a preparation process of a wireless temperature sensor utilizing electromagnetic self-energizing. The wireless temperature sensor includes a wireless temperature sensor body, an alloy band and an alloy band fixing structure, wherein the wireless temperature sensor body includes an upper cover, a lower cover, a shielding board and a PCB, two side walls of the upper cover areprovided with through grooves communicating with each other, an inner wall of the upper cover is provided with an upper cover slot, the lower cover is circumferentially provided with a pin matched with the upper slot, and the PCB is provided with an electronic component. The preparation process includes steps of coil framework winding, electronic component welding, assembling, glue injection andtesting. The preparation process is advantaged in that super-low power consumption and micro electromagnetic energy collection are achieved, cells and radio frequency communication are not needed, advantages of environmental friendliness, free maintenance, electrical complete isolation, convenient mounting, strong anti-interference capability, reliable work and small volume are further achieved, atemperature measurement problem in a high voltage state can be well solved, the acquired temperature can be transmitted to a monitoring terminal in real time through radio frequency communication, and intermittent and accurate measurement is achieved.

A method and a circuit arrangement for unlocking a charging plug in an emergency designed for a charging station for charging an electric energy storage of an electric vehicle, having a locking mechanism activated by an electric-motor drive unit. An emergency unlocking controller is a self-sufficient functional block in conjunction with a step-up converter for supplying the electric-motor drive unit with power, the input voltage of the step-up converter stepped up to the nominal voltage of the electric motor. A microcontroller controls and monitors the electric-motor drive unit and the step-up converter and for communicating with a superordinate locking controller generally disposed in the charging station. The step-up converter allows nearly the entire electric energy stored in the storage capacitor connected upstream of the step-up converter to be supplied to the electric-motor drive unit, whereby the motor can be operated at its required nominal voltage.

The invention provides a blow-off system for an orbit control engine ground test. A combustion agent blow-off pipeline and an oxidant blow-off pipeline are respectively arranged between a blow-off gas source and an orbit control engine, a first control valve and a first one-way valve are sequentially arranged on the combustion agent blow-off pipeline in the flowing direction of output gas of the blow-off gas source, and a second control valve and a second one-way valve are sequentially arranged on the oxidant blow-off pipeline. A double-valve-seat one-way flow control valve is arranged at the downstream of a blow-off control valve, so that a valve core of the blow-off control valve cannot be changed in position due to the start-up or shutdown pressure peak of the orbit control engine, and isolation of oxygen and combustion propellants in the blow-off system is safer and more reliable.

The invention relates to a system for self-protection against forest fires, especially for the protection of urban communities (1) close to forest areas (2), which comprises creating a protective area (3) around the urban community (1) to be protected and assembling in said area a hydraulic water supply system (4) capable of covering at least the protective area.

The invention discloses a multi-center biomedical data co-processing system and method without patient data sharing. The multi-center biomedical data co-processing system comprises a cloud server anda medical center client, wherein the cloud server is used for coordinating various medical center model parameters and asynchronously calculating; the medical center client is used for carrying out local high-performance calculation on data; the cloud server comprises a parameter manager and a task scheduler. A parameter sharing mechanism and an asynchronous communication mechanism are connected and managed through a parameter manager and a task scheduler of a cloud server and are jointly applied to multi-center medical data collaborative computing; security isolation between medical center data and a cloud server can be met, and the privacy of medical center patient data is fully protected; meanwhile, compared with a direct synchronous exchange data calculation result, the calculation waiting time is effectively shortened, and the analysis efficiency and the data processing capacity of multi-center cooperative processing are greatly improved.

The invention discloses a fuel battery system and a control method thereof. By controlling switching on and off of corresponding electromagnetic valves, time-sharing work of a fuel battery pack I anda fuel battery pack II are realized, high-efficiency zones of fuel batteries are enlarged, and the economic performance of a fuel battery vehicle can be remarkably increased; a provided centrifugal voltage balancer is capable of effectively avoiding the problem of waste of hydrogen caused by gas circuit blowing, and the pressure of gas circuits at two sides can be stabilized to a certain degree, so that the service life of the fuel batteries can be prolonged. The control method of the fuel battery system is further put forward according to the fuel battery system. The control method is capableof increasing the economic performance of the fuel battery system as much as possible on the basis that the characteristics of the fuel battery system are fully considered.

The invention discloses an isolation buffer two-level inversion circuit, which comprises a direct current unit, an inversion unit and a controller, wherein the direct current unit is connected with the inversion unit; an isolation buffer driving unit is arranged between the inversion unit and the controller; the inversion unit is connected with the controller through the isolation buffer driving unit; the isolation buffer driving unit comprises a buffer unit, a conditioning unit and a driving unit; a control signal output end of the controller is connected with a gate pole of an IGBT switching tube of the inversion unit through the buffer unit, the conditioning unit and the driving unit in turn; and one control signal output end correspondingly controls one gate pole of the IGBT switching tube. The isolation buffer two-level inversion circuit has safe and reliable insulated isolation and flexible and convenient overall layout, reduces the requirement on the voltage stress of isolation devices on the premise of not losing the performance, reduces the requirement of the whole circuit isolation security on the devices, and is a product design with low cost and high performance.

The invention provides a method and device for invoking an application program. The method comprises: receiving an invoking instruction to invoke a second application by a first application; determining whether the second application is installed in a current system normal mode with an administrator logged in; if yes, running the second application in the system normal mode according to the invoking instruction; if no, continuing to determine whether the second application is installed in a system protection mode with a normal user logged in; switching the system from the current system normal mode to the system protection mode when the second application is installed in the system protection mode; and running the second application in the system protection mode according to the invoking instruction, wherein a safe space providing a running resource for running of a predetermined application is configured in the system protection mode, and the safe space is unavailable in the system normal mode. The above method and device avoid repeated installation of an application in multiple modes, thereby saving the system space and enhancing the user experience. Besides, a mobile terminal is also provided.

The invention discloses a low-maintenance-cost permanent magnet synchronous motor driving circuit. The low-maintenance-cost permanent magnet synchronous motor driving circuit comprises a driving subsystem, an IGBT driving circuit and a main control module; the driving subsystem comprises a rectifying and filtering circuit, a direct-current bus, a voltage sensor circuit, a direct-current sensor circuit, a switch power circuit, a fault protection circuit and an IGBT module circuit; the rectifying and filtering circuit, the direct-current bus and the IGBT module circuit are sequentially connectedbetween an external power grid and a motor in series; an over-current fault signal output end which is connected with the IGBT module circuit and the main control module separately is arranged on theIGBT driving circuit; and PWM signal, enabling signal and brake signal output ends connected with the IGBT driving circuit are arranged on the main control module. By means of the mode, the low-maintenance-cost permanent magnet synchronous motor driving circuit is provided; and the IGBT driving circuit and an IGBT driving module are separated in design, so that when a power device is damaged, thedriving circuit does not need to be replaced together, thereby lowering the maintenance cost.

The invention discloses a self-energizing wireless temperature sensor using electromagnetism, comprising a casing, and a PCB board installed in the casing, wherein two communicating slots are formed on both sides of the casing; the PCB board is provided with an energy collecting unit, a rectifying circuit, a voltage stabilizing protection module and a main control IC chip; the main control IC chipcontains a micro control unit and an RF radio frequency processing unit; the energy collecting unit comprises a coil bobbin, which is fixedly mounted on the PCB board; and alloy strips are provided in the communicating slots and in the hollow of the coil bobbin. The self-energizing wireless temperature sensor using electromagnetism has ultra-low power consumption, micro-electromagnetic energy collection, no need of battery, and radio frequency communication, has the advantages such as green environmental protection, maintenance-free, thorough electrical isolation, convenient installation, strong anti-interference ability, reliable work and small size, and can well solve the temperature measurement problem under high voltage state. By transmitting the collected temperature to the monitoring terminal through radio frequency communication in real time, intermittent data transmission and accurate measurement are realized.

The invention discloses a dust removal method and system for primary flue gas of a converter. The method comprises the following steps that the primary flue gas enters a spray tower through an evaporative cooling flue to be subjected to cooling and rough dust removal; the flue gas obtained after rough dust removal enters a circular seam venturi tube to be subjected to fine dust removal; the flue gas obtained after fine dust removal enters a dehydrator to be dehydrated; the dehydrated flue gas enters a wet electrostatic precipitator to be subjected to ultrafine dust removal; and the flue gas obtained after ultrafine dust removal enters a gas holder to be stored if meeting recovery conditions, and the flue gas is ignited and then discharged into the atmosphere through a diffusion chimney ifnot meeting the recovery conditions. According to the method, wet electrostatic precipitation is utilized to improve trapping of ultrafine dust, the particle emission concentration of the primary fluegas of the converter does not exceed 10 mg / Nm<3>, and the requirement for ultralow emission is met; meanwhile, the anti-explosion wet electrostatic precipitator is arranged behind the dehydrator; anda gradient oxygen blowing model is adopted in combination with fan flow control, so that the safety and reliability of a process system are ensured.

The invention relates to a method for replacing a valve-regulated lead acid battery in a substation with electricity, which comprises the following steps of: manufacturing a bridging device comprisingtwo bridging wires, a diode, a positive electrode post clip and a negative electrode post clip, wherein the negative electrode post clip and the positive electrode post clip are respectively connected with the positive electrode of the diode and the negative electrode of the diode through a bridging wire; Clamping the positive electrode pillar clamp and the negative electrode pillar clamp on theseries lead of the positive electrode and the negative electrode of the fault battery respectively; Disconnect the series lead and the positive and negative poles of the fault battery respectively, and then connect the spare battery into the battery group through the series lead; Remove the positive and negative pillar clips from the series lead. The invention has reasonable design, ensures the reliable power supply of the DC system, and ensures the personal safety of the working personnel in the replacement process. At the same time, the working efficiency of replacing the faulty batteries isimproved, so that the maintenance personnel can quickly, timely and safely isolate the faulty batteries after discovering the problems.