867results about How to "Improve safety and reliability performance" patented technology

The invention discloses a control method for a quality control system of micro source internetworking electric energy. A primary side of the coupling voltage transformer on a serial active power filter side of a UPQC (unified power quality controller) is connected with a larger current-limiting inductor in parallel, and a direct-current large-capacitance side of the UPQC is connected with a photovoltaic generating power supply in parallel. Due to effects of cooperative control, the photovoltaic power supply is internetworked for power generation during normal operation, active power is provided for a power grid by the parallel active power filter of the UPQC, and the harmonic current from a load side and the voltage fluctuation and harmonic voltage from the power grid side are governed and compensated by the UPQC. In the case of short-circuiting failure on the load side, the main circuit of the UPQC stops operating, a secondary side of the coupling voltage transformer is subjected to high impedance, and the current can be limited by the parallel current-limiting large inductor. By adopting the method, the functions of failure current limitation, harmonic treatment, voltage support, photovoltaic power generation and the like can be realized during micro grid internetworking operation, and the optimized protection and operation of the quality of electric energy in micro grid internetworking can also be realized.

A medical filtering machine for the hemodialysis is composed of main body with console panel, blood loop consisting artery loop and vein loop, liquid-supplementing loop, water channel system and operation-control system. Said water channel system consists of reverse osmosis jointer, heat exchanger, heater, gear pump, deaerating unit, two concentrated liquid pumps, mixer, ion concentration monitor, volume balance and ultrafiltration unit, and endotoxin filter.

The invention discloses an unmanned aerial vehicle comprehensive ground station system which taken a vehicle body as a carrier; a device installed on the vehicle body comprises an unmanned aerial vehicle push-pull type fixed loading structure; the unmanned aerial vehicle push-pull type fixed loading structure comprises a sliding rail connected with an engineering vehicle; a loading flat plate for an unmanned aerial vehicle body to be placed is arranged at the upper part of the sliding rail; an embedded groove matched with an unmanned aerial vehicle body underframe is formed on the loading flat plate; and a buckle for fixing the unmanned aerial vehicle body underframe is also arranged on the loading flat plate. The invention further provides an application method of the unmanned aerial vehicle comprehensive ground station system. The unmanned aerial vehicle comprehensive ground station system and the application method thereof have the beneficial effects that an unmanned aerial vehicle can be matched for power transmission line inspection task, so that the safe reliability and the detection effectiveness can be effectively improved, and meanwhile, and the practical significance for the unmanned aerial vehicle inspection area and scope extension is prodigious.

The invention discloses a mine-hoist constant deceleration safety braking system and a braking method thereof, and relates to the technical field of mine-hoist safety braking control. The system comprises a disk brake, a hydraulic station, an electric control device and a detection feedback device which are arranged on a drum brake disk, wherein a speed sensor arranged on the drum acquires a hoist deceleration signal and inputs the hoist deceleration signal into the electric control device; the electric control device receives the signal and compares the signal with the given speed value to send out a control command; after the control command is processed into an electric signal and compared with an oil pressure signal which is fed back by a pressure sensor on the hydraulic pipeline arranged between the outlet end of an electrohydraulic proportion reversing valve and the disk brake cylinder, an electric signal control command is sent out; and the electrohydraulic proportion reversingvalve of the hydraulic station outputs a hydraulic pressure signal, which varies as the input control command varies, so as to control the motion state of the hoist by the disk brake, thereby realizing constant deceleration safety braking of the mine hoist.

The invention discloses a ramp way control method of a pure electric vehicle. The ramp way control method of the pure electric vehicle includes the following steps: collecting angle information of a full vehicle and judging a running state of the full vehicle according to the angle information; acquiring state information of the full vehicle when the running state of the full vehicle is judged as an uphill state, and judging whether the full vehicle is in an uphill starting state according to the state information of the full vehicle, wherein the state information of the full vehicle comprises a current speed of the full vehicle; and comparing the current speed of the full vehicle with a target speed and calculating uphill starting torsion of the full vehicle when the full vehicle is in the uphill starting state, and sending the uphill starting torsion of the full vehicle to a motor control system of the full vehicle to drive the full vehicle to output corresponding torsion. According to the ramp way control method of the pure electric vehicle, a torsion request numerical value when the vehicle runs on a ramp way is calculated according to a current state of the full vehicle, accordingly the corresponding torsion is output by the motor control system, so that safe reliability and comfort when the full vehicle runs on the ramp way are guaranteed.

An illuminated helmet with a plurality of lamps positioned in at least one recess, a controller to operate the lamps in a flashing pattern, and a proximity sensor to activate the controller and lamps upon detection of a user's head. The recesses for the lamps and other components are located in a non-impact area of the helmet. The lamps are arranged to be visible to a viewer from any angle, and the flashing patterns of the lamps are programmed to draw the attention of the human eye.

The present invention provides an illuminated helmet with a plurality of lamps positioned in at least one recess in the helmet to reduce the risk of damage to the lamps and prevent the lamps from injuring a user during an accident. The illuminated helmet also provides specific recesses for the lamps and other components located in a non-impact area of the helmet to further reduce the risk of injury from the components and lamps in an accident. Furthermore, the illuminated helmet provides a proximity sensor mounted within the helmet that lacks mechanical parts and automatically activates the lamps when the helmet is worn by a user, improving the safety and reliability of the proximity sensor and overall helmet. The lamps are arranged in such a manner as to be visible to a viewer from any angle, and the flashing patterns of the lamps are uniquely programmed to draw the attention of the human eye.

The invention relates to a concrete-filled steel tube sectional type sleeve gusset and a construction method thereof, which relate to a connecting gusset for connecting a concrete-filled steel tube column and a girder in civil engineering and a construction method thereof. The concrete-filled steel tube sectional type sleeve gusset comprises the concrete-filled steel tube column and the steel girder which is connected with the column, wherein the concrete-filled steel tube column is formed by filling concrete into a steel tube; the steel tube is formed by connecting an upper column steel tube and a lower column steel tube through a connecting sleeve; the connecting sleeve and the lower column steel tube are in split type; an upper reinforcement ring plate and a lower reinforcement ring plate are arranged outside the connecting sleeve; and a vertical connecting plate is arranged between the upper reinforcement ring plate and the lower reinforcement ring plate. The connecting sleeve and the lower column steel tube in the concrete-filled steel tube sectional type sleeve gusset are in split type, so that the concrete casting strength of the lower column steel tube and the upper column steel tube can be different under the condition of construction, thereby the requirement of strong gussets and weak members can be met. Moreover, the concrete-filled steel tube sectional type sleeve gusset has the advantages of concise and definite force transferring path, large gusset rigidity, high bearing capacity, superior mechanical property, good anti-seismic performance and simple and convenient processing and manufacture.

The invention discloses a detecting and positioning device of arc fault of a switch apparatus, relating to the detecting and positioning field of arc fault of switch apparatus. The detecting and positioning device of arc fault of switch apparatus comprises a fault current detection module for detecting the current at the line feeding side of the switch apparatus and outputting the arc fault signal of the switch apparatus; a faulty arc acquisition module for collecting the arc light signal of the switch apparatus, and storing and outputting the image signal of the faulty arc in real time; an arc monitoring and intelligent processing module for displaying the faulty arc image, reversely positioning the arc generation position according to the faulty arc image and outputting the protection signal of the switch apparatus.

The invention discloses an automobile body cover part. A vacuum introduction molding technique is utilized to form a carbon fiber hybrid resin-base composite material foam sandwich structure composite material. The carbon fiber hybrid reinforcing body comprises 60-90% (volume) of carbon fiber and 10-40% (volume) of glass fiber or second organic fiber. The invention can be used for obtaining an automobile body cover part which has the advantages of low density, high strength, high rigidity, high shock resistance, excellent fatigue property, excellent moisture resistance, excellent corrosion resistance, favorable surface effect and the like. The invention greatly prolongs the service life, enhances the safety and reliability, and saves the cost.

The invention relates to a continuous casting tundish diffuse-type gas-permeable ring upper nozzle brick cup and an argon blowing refining method thereof. The upper nozzle brick cup comprises an upper nozzle brick cup body, diffuse-type gas-permeable rings, a gas chamber and a gas inlet pipe, wherein the gas-permeable rings are uniformly arranged in a circle; the gas-permeable rings and the circular gas chamber are arranged in the upper nozzle brick cup body; the air chamber is arranged at the bottoms of the diffuse-type gas-permeable rings and communicate with the diffuse-type gas-permeable rings; the upper parts of the gas-permeable rings extend out of the upper surface of the upper nozzle brick cup body by 5 to 10 mm; the gas inlet pipe is connected to one side part of the gas chamber; one end of the gas inlet pipe communicates with the air chamber; the other end of the gas inlet pipe extends out of one side part of the upper nozzle brick cup body, is connected with a metal pipe fitting and communicates with an external argon gas source; an upward circular air curtain barrier is formed after argon gas is blown into the gas inlet pipe, so that gas washing of molten steel entering an upper nozzle is realized, and floating and removing of inclusions are promoted; and a certain quantity of argon bubbles enter the upper nozzle along with a steel flow, so that a stable and continuous circular gas flow is formed, which not only solves the problem of nozzle clogging, but also solves the technical problem that protective argon bubbles enter steel to cause sub-surface bubbles of a casting blank.

The invention discloses an LNG ship remote monitoring system. An AIS system of an LNG ship supervision platform is used for analyzing an AIS message to obtain information of a supervised ship so as to position the supervised ship, and a ship position is displayed through an electronic chart system; corresponding supervision data and query statistical information of the ship are displayed for people with different permissions at a client based on the permission management. The system disclosed by the invention integrates an information technology, a networking technology, an intelligent technology and a visualization technology, can cover the whole LNG ship and a sea area in an LNG wharf to perform the remote monitoring on the LNG ship, thereby achieving aims of remote visualization monitoring, information acquisition, paperless office, and all-weather supervision; the problems of insufficient functions of traditional monitoring equipment, difficulty in performing automatic evaluation on navigation safety of the LNG ship, the risk source certification and analytic hierarchy method of LNG ship berthing and departing and unloading job, and fuzzy comprehensive evaluationare solved, and the interconnection and intercommunication among port and waterway, pilotage, port control and maritime affairs departments, an LNG receiving station and the like can be effectively realized.

The invention relates to an intelligent monitoring system of a distribution network switch cabinet. The system adopts an embedded installation technology to carry out intelligent monitoring on operation state of equipment in a switch station on the basis of an ultra-high-frequency partial discharge detection technology and a temperature monitoring technology. The problem of difficulty in real-time monitoring on the environment temperature and the equipment insulation state in the switch station cabinet is effectively solved. Equipment insulation state data is transmitted in real time; the partial discharge of a cable terminal, a busbar, a switch on-off device and the like in the switch cabinet caused by insulation defects or insulation aging can be monitored in real time; the development trend and the operation state of the insulation defects in a distribution network cabinet are monitored in real time; the insulation defects or faults which can become more severe can be discovered and warned in advance. When the system is put into operation, the safety operation level and the intelligent management level of the switch station can be greatly improved; serious power failures and fire accidents caused by the insulation defects of the equipment can be effectively avoided, and periodic detection is changed to be condition overhaul. The safety reliability and the automation degree of power system operation are improved.

A method for implementing Mobile Switch Center (MSC) dual homing includes: dividing a first physical MSC Server into a plurality of virtual MSC Servers; establishing a dual homing relation between a first virtual MSC Server of the plurality of virtual MSC Servers and a second physical MSC Server; switching by the first virtual MSC Server from idle state to activate state if determining by the first virtual MSC Server that state switching is needed The scheme may implement the Mobile Switch Center (MSC) dual homing, and improve the reliability of mobile communication network; the implementation is simple and flexible.

The invention provides a mining electric locomotive passerby monitoring method based on image processing and an alarm system and belongs to the field of safe transportation of coal mines. The system comprises a video collection module, an image processing module and an acousto-optic alarm module, wherein an infrared video camera for video collection is used for collecting images at the front of an electric locomotive; the image processing module comprises image preprocessing, rail identifying and fitting and passerby identifying; the image preprocessing is based on a genetic algorithm, image self-adapting correction combined with a normalization non-complete Beta function and an image binarization method based on a pulse coupling neural network; the rail identifying and fitting is based on fuzzy edge detection fast algorithm with an improved threshold of a genetic algorithm and a heuristic connection method; the passerby identifying is based on a pulse coupling neural network image binarization method realized by virtue of an FPGA (Field Programmable Gate Array); and the acousto-optic alarm module comprises an acousto-optic alarm and a control circuit. The system can be used for effectively identifying passersby at the neighborhood of a rail, judging and pre-alarming the position of the passersby and eliminating the potential safety hazard of the electric locomotive in a transportation process.

A lock type manually tightened chuck includes a front cover, an inner cover, a driving nut and a chuck body. The front cover is located at the front side of chuck body. The driving nut is fixed to the chuck body in the middle part thereof. A plurality of thin pillars are fixedly attached to the inner cover circumferentially. A plurality of elastic pallets at an end thereof respectively connect with the thin pillar firmly, and the other ends of the pallets has a stick-up respectively. The inner cover is fixedly set around the driving nut. The front cover at the inner wall thereof has a plurality of recesses and each of the recesses has two lateral walls with one of the lateral walls contacting the walls of the thin pillars and the other lateral walls are disposed at the pick-ups of the pallets to lean against each other. A set of ratchets is disposed at the chuck body evenly to correspond to the pallets. The lock type manually tightened chuck can prevent the drill from loosening when it is in work and can be used under being frequently subjected to impact loads.

Disclosed herein is an airbag device including a tether attached to an airbag for determining an expansion shape of the airbag. The tether is formed in such a manner that the expansion length of the middle part of an airbag is shorter than the expansion length of both side edges of the airbag when the airbag is expanded, whereby direct contact between the chest or the head of a passenger and the airbag is prevented. Consequently, the passenger is not injured by a punch-out-force created by sudden expansion in the central region of the airbag when the expansion of the airbag is initiated. In addition, the passenger is not subjected to the pressure of the airbag, and the passenger is nestled in the airbag, whereby the passenger is not out of the protection range of the airbag even when a vehicle is rocked from side to side after the airbag has been expanded.

The invention relates to a container terminal handling system which consists of a quayside container crane and a yard crane and uses a stereometric low-bridge transfer system and a ground transportation car system to carry out connection. The low-bridge transfer system consists of a low-bridge transfer subsystem, wherein, the low-bridge subsystem is provided with a low-bridge rail which consists of a low-bridge crane rail and a low-bridge platform lorry rail; a low-bridge crane is arranged on the low-bridge crane rail; a low-bridge platform lorry rail is arranged on the low-bridge platform lorry rail. The ground transportation car system consists of a ground transportation car rail which consists of a car running along the transportation car rail. The invention carries out transportation in a form with the rail, uses commercial power as energy during the whole process and provides the stereometric low-bridge transfer system and the ground transportation system to realize the stereo transportation, which also realizes high-efficiency energy saving, environmental protection and automation, effectively utilizes land resources and is the extension and development of the applicant to the patent of the invention (200510111464.0).

The invention discloses a battery box for a vehicle, a vehicle body component and an automobile. The battery box for the vehicle comprises a first battery accommodation part having a first battery space for accommodating the battery, a second battery accommodation part which is apart from the first battery accommodation part and has a second battery space for accommodating the battery, and a third battery accommodation part which is connected with the first battery accommodation part and the second battery accommodation part, wherein a space between boxes for accommodating feet of a passenger is formed at the two sides of the third battery accommodation part between the first battery accommodation part and the second battery accommodation part; and the third battery accommodation part has a third battery space which is communicated with the first second battery space and the second battery space. The vehicle body component comprises a floor covering member which is provided with an accommodation part for accommodating the battery box for the vehicle, wherein the accommodation part is below the space of the passenger; and a floor beam structure which is fixed on the lower portion of the floor covering member and forms the boundary for accommodating the battery box for the vehicle. Therefore, requirements for relatively high range and safe reliability can be met.

The invention relates to the technical field of copyright image protection, and provides a decentralized image copyright protection system and method with infringement real-time detection, and the method comprises the following steps of (1), enabling a registered user to upload an image through a client, and enabling an SIFT image feature extraction algorithm in the system to carry out the featuredata collection on the uploaded image; (2) extracting the invariant characteristics, such as visual angle, translation, affine, brightness, rotation, etc., of an existing copyright image by a user through an SIFT algorithm to form a local feature vector set of the image, and taking the local feature vector set as a registered image feature data set; (3) carrying out distributed storage on the feature data sets in the steps (1) and (2) by utilizing an IPFS (Internet Protocol File System), and constructing a network transmission protocol for persistent and distributed storage and file sharing;and (4) performing comparative analysis and calculation, and judging that the image does not accord with the condition of forming a new work. The system and the method provided by the invention have the characteristics of being tamper-proofing, realizing the high safety, permanent preservation and decentralization, being able to trace, being low in cost, etc.

The application provides a bank system transaction information management method, a system and a general account transfer system. An outbound system is independently arranged outside application subsystems, after a transaction request sent by the application subsystems and logically processed through the application subsystems is obtained, a bank core system is called according to the identification information of the transaction request, a transaction result processed through the bank core system is obtained, an application subsystem corresponding to the transaction result is determined according to the transaction codes of the transaction result, and the transaction result is sent to the application subsystem, accordingly, the process is independent of the application subsystem, so that the outbound system is not required to be specially arranged in the application subsystem, the workload of the application subsystems is reduced to the greatest extent, the processing efficiency and safe reliability of the application subsystems are improved and meanwhile, redundant codes generated by the outbound system are prevented.

The invention relates to a steel support shaft stress adaptive real-time compensating and monitoring system in deep base pit construction, which can effectively control deformation in construction of the deep base pit and ensure the security of running subway tunnels, wherein the steel support shaft stress compensating actuating mechanism is provided with an economic, safe and reliable self-locking booster oil cylinder. The invention is used for compensating steel support shaft stress in constructing deep base pit of near subway operating buildingworks, is provided with the novel oil cylinder actuating mechanism which has small volume, light weight, good economy and safety, high reliability and convenient use, solves the safe and reliable support of the steel support shaft stress compensation and serves the engineering construction.

The invention relates to a non-disturbance switching water pump control method comprising the following steps of: selecting different control manners of a water pump motor according to operation requirements of a water pump system; using a long-distance control manner of the water pump motor when a water pump normally works, so that a PLC (Programmable Logic Controller) performs monitoring and on-off control on a motor state automatically or according to set technological parameters; when the water pump has a fault and needs to maintain or carry out field emergency enablement, selecting an in-position control manner of the water pump motor which is operated to a field operation box; and realizing non-disturbance switching between the two modes when the motor continuously works through delay relays which are respectively arranged at each mode state in a mutual switching process. In a condition of not changing any technical requirement of the water pump system, the non-disturbance switching water pump control method provided by the invention can be used for not only realizing a control manner of mutually switching between a concentrated manner and a local manner of the water pump motor without being switched off, but also carrying out on-off operation on the field operation box and an HMI (Human-Machine Interface), so that the security reliability and operation convenience of the water pump system can be improved.

The invention relates to an electric automobile chassis system with a four-wheel independent steering function and a steer-by-wire mechanism of the electric automobile chassis system. The steer-by-wire mechanism comprises two steering pull rods, a steering power unit and two transmission units, the steering pull rods are arranged horizontally, the end, close to a wheel, of each steering pull rod is hinged to a steering knuckle of a suspension wheel assembly, and when the plane where wheels are located is perpendicular to the steering pull rods, the two steering pull rods are symmetrical about the vertical radial direction of the wheels; the steering power unit is electrically connected with an electronic control unit of an electric automobile and provided with two levels of power output ends which are the same in speed ratio and opposite in power output direction; the power output ends of the two transmission units are connected with the two levels of power output ends of the steering power unit respectively, and the power output end of each transmission unit is connected with one end, away from the corresponding wheel, of the corresponding steering pull rod to drive the steering pull rod to move back and forth to drive the corresponding wheel to swing. According to the electric automobile chassis system with the four-wheel independent steering function and the steer-by-wire mechanism of the electric automobile chassis system, steering stability of the wheels is good, and the electric automobile chassis system is safe, reliable and good in maneuverability in narrow space.

The invention relates to a handle with locking and safety devices for fast disassembling a bicycle, comprising a handle, a screw, a screw hole and pins, wherein an eccentric wheel is arranged on the handle, and the screw is moveably connected with the handle by the pins. The handle is characterized in that a safety block hole is arranged on the handle, a safety block is arranged in the safety block hole, a locking block is arranged on one end of the safety block, and a screw block is arranged on the screw and is provided with a locking hole matched with the locking block; a button is fixed on the upper end of the safety block, a spring hole is arranged on the middle of the safety block and is provided with a spring, and the handle, the safety block and the spring are connected into a whole by the pins; acted by the spring and the pins, the safety block is automatically returned; and when an accessory is tightly pressed by the eccentric wheel on the handle, the locking block on the safety block is led into the locking hole on the screw block, and the handle can only be pulled by pressing a button so as to cause the eccentric wheel on the handle to release the accessory. The handle has favorable safety and practicability, is suitable for the existing bicycle folder handle and the bicycle fast disassembly handle, greatly improves the safety of the bicycle during driving, prevents the danger caused by handle looseness from occurring, has considerably simple structure and low manufacturing cost, and is applicable to the bicycle and an electric motorcar.

The invention discloses a transient overvoltage monitoring method. The method includes the following steps: setting sampling parameters; acquiring voltage signals from a high-voltage bus through a voltage sensor; carrying out signal preprocessing on the acquired voltage signals; displaying a voltage waveform in real time; judging whether a voltage is overvoltage or not; storing overvoltage data; carrying out time-domain analysis on the overvoltage; and carrying out frequency-domain analysis on the overvoltage. Through online monitoring of the overvoltage, various overvoltage types and overvoltage generation reasons and effects on an electric power system are analyzed, an improvement scheme is provided, damage, caused by the overvoltage, low voltage and electric energy quality, to the electric power system and electric devices is effectively reduced, and quality, safety and reliability of power supply of the electric power system are promoted.

The invention discloses a process method for well completion at equal borehole diameter, which is applied to the well completion construction of oil and gas. The process method comprises the following steps of: drilling an open hole well section; downwards placing an expansion sleeve and an expansion tool; reducing a diameter-variable expansion cone by using a pump; enabling the expansion sleeve to form a lapped horn mouth by pressing; anchoring by a low-stage sealing anchoring device; injecting cementing cement into an annular space between the open hole well wall and the expansion sleeve by using a cement truck through a drill rod and the expansion tool; at the cement curing phase, continuously expanding the expansion sleeve through an upper-stage diameter-variable expansion cone; upwards lifting and recovering the expansion tool after the expansion operation is ended; downwards placing a milling tool for milling the lower-stage sealing anchoring device and a cement plug; drilling an open hole of next-stage well section; and repeating the construction operation of downwards placing the expansion sleeve and the expansion tool to realize the well body of a completion well at equal well diameter. The invention has the benefits that the inside diameter required for lapping and the inside diameter for designing the structure of the well body can be formed by reducing the reducing cones in different diameters for one time and the tube expansion process can be finished in a mode for combining machinery and hydraulic pressure.

The invention provides an inner-wall non-sectional type high-temperature thermal test device of a large high-speed aircraft round-shell structure. The device comprises an L-shaped electrode support, an annular flat copper bracket, a quartz burner, an electrode, a metal pressing piece, a water-cooling copper tube, a large high-speed aircraft round-shell structure, an annular ceramic locating rack and a round locating hole. The device can achieve a non-sectional type high-temperature thermal test for a 2-m large high-speed aircraft inner cabin structure, prevents wave-shaped peak-valley variation of a large elastomer temperature field caused by a sectional splicing heating mode, improves the temperature uniformity, reality and safe reliability of the large elastomer temperature test, and provides an important means for researching high-temperature characteristic and heat-insulation performance of the large high-speed aircraft inner cabin structure.

The invention relates to a monitoring method of IGBT collector overvoltage double protection. An IGBT collector overvoltage double protection circuit, which comprises an IGBT, a microcontroller, an IGBT driving circuit, a resistor R1 and a resistor R2. An output end of the IGBT driving circuit is connected to a grid G of the IGBT. The collector C of the IGBT is connected to an input end of the microcontroller after voltage divider of the tandem voltage divider resistors R1 and R2. The output end of the microcontroller is connected to the input end of the IGBT driving circuit. The microcontroller comprises comparators CMP1 and CMP2, a first IGBT control circuit and a second IGBT control circuit, negative input ends of the comparators CMP1 and CMP2 are respectively connected with reference voltages, and output ends are respectively connected with the first IGBT control circuit and the second IGBT control circuit, wherein when the comparator CMP1 outputs a high electrical level, the microcontroller generates an interrupt handling program INT1 by the handling of the first IGBT control circuit; and when the comparator CMP2 outputs a high electrical level, the IGBT is turned off by the handling of the second IGBT control circuit, and the microcontroller generates an interrupt handling program INT2. By adopting the method, the IGBT collector voltage can be monitored in real time.