175 results about "Emergency treatment method" patented technology

The invention discloses an emergency treatment method for sudden gushing of a high confined water stratum foundation pit. The method is characterized by comprising the steps that the water gushing condition is proved, a steel casing is arranged on the water gushing point in a covering manner to serve as an energy-releasing relief well, a simple back pressure platform is arranged at the bottom of the steel casing, the height of the steel casing should be 1 m above the static water level, water gushing kinetic energy can be guided into the steel casing, then, the water head pressure is released, and the water level in the steel casing depends on the pressure difference to be balanced; and meanwhile, the top face of the casing is sealed, communication of internal gas pressure and external gas pressure of the casing is prevented, the backpressure backfilling sealing grouting condition is simulated, a WSS double-tube non-shrinkage two-fluid grouting technology is adopted for carrying out advancing type segmented grouting, and therefore the aims of rapidly controlling water gushing of the foundation pit and reducing the risks of the foundation pit are achieved. According to the method, the number of emergency treatment materials and machine tools is small, the source is convenient, a construction technology is simple, the workload is small, and the construction cost is low; the emergency treatment time is short, and the dangerous omen can be rapidly controlled; and the method is suitable for treating water gushing of the foundation pit in various foundation pit excavation processes, and is particularly best in sudden gushing treatment effect of the high confined water head stratum foundation pit.

The invention relates to a medical emergency treatment method and system. The emergency treatment system is composed of a distress part and an emergency treatment apparatus receiving part, wherein the distress part comprises an accident triggering module, an accident judging and information processing module, an on-site distress module, a remote communication module and the like; the emergency treatment apparatus receiving part comprises a remote communication module, an information processing and on-site alarming module and the like. When emergent disease accidents such as entricular fibrillation, myocardial infarction and the like happen, a promoting message lasting for a fixed period of time is generated by the accident judging and information processing module and a patient determines whether to ask for help or not during the period; if the patient loses the disposing capacity, the emergency treatment system gives an alarm to an on-site and / or nearest and available emergency treatment apparatus or / and an emergency treatment center through the on-site distress module and the remote communication module in a wire or / and wireless communication way after the promoting period runs out, so that medical care personnel can obtain the accurate medical treatment information and rush to the scene to treat relative affairs and can recoup losses of medical accidents as much as possible.

The invention discloses an unpiloted system navigation control method based on a global positioning system or a mobile communication network, and relates to an unpiloted system navigation method. The unpiloted system navigation control method comprises the following steps: using the global positioning system or the mobile communication network to monitor the navigation process of the unpiloted system, according to the parameters obtained by monitoring, calculating to obtain the current navigation track of the unpiloted system, so as to avoid certain regions, and adopt emergency treatment method when the unpiloted system accidentally enters the region required to be avoided. The unpiloted system navigation control method disclosed by the invention completely uses the positioning function of the satellite positioning system and the mobile communication network, and utilizes the compensating parameter obtained through measurement by the mobile communication network to correct the motion parameter obtained through measurement by the satellite positioning system, so as to obtain the relatively accurate navigation track; according to comparison between the navigation track and the preset route, the method can accurately correct the navigation state of the unpiloted system to be matched with the preset route; meanwhile the avoiding region is preset in the navigation region, so that the unpiloted system can automatically avoid the avoiding region.

The invention provides an emergency treatment system for elevators. The emergency treatment system comprises an elevator comprehensive information database, an elevator code assigning subsystem, an elevator grid management subsystem, an elevator dynamic state monitoring subsystem, an elevator fault / accident calling subsystem, an elevator emergency dispatching subsystem and an elevator fault / accident disposal management subsystem. An emergency treatment method for the elevators based on the system comprises the steps that firstly, a complete and accurate elevator comprehensive information database is formed; secondly, elevator identification codes are assigned to the elevators; thirdly, grid dividing and positioning of the elevators, maintaining units and nearby rescuing stations on a map are achieved; fourthly, the elevator calling subsystem is connected through an assembly of the elevator dynamic state monitoring subsystem installed on the elevator or a manual alarming manner; fifthly, after the fault rescuing call is answered, the system arranges rescue in time according to the elevator identification code provided by a person calling for help; and sixthly, rescuing is finished, and a detailed log information record from alarming to the command stage to rescuing ending is formed.

The invention provides an emergency treatment method for eutrophic water blue algae eruption. An enclosure device used for forming a treatment area is arranged by facing the prevailing wind direction in which blue algae float and are gathered; a salvaging device is used for salvaging the algae in the treatment area; a peak shaving pool is used for temporarily storing the salvaged algae; blue algae cell degassing, flocculation precipitation separation, floatation separation and magnetic separation are adopted to achieve algae and water separation, and algae slag is formed; a dewatering device is used for conducting dewatering treatment on the algae slag, and algae mud is formed; and drying treatment is conducted on the algae mud, and algae particles with the water content smaller than 40% are formed. In the emergency treatment method, efficient salvaging, collecting and algae and water separation are achieved when blue algae are erupted in eutrophic water while the original landscape is protected, volume reduction is achieved to a great extent, removed algae clean water can directly flow back into the water, waste of water resources is avoided, in addition, the algae particles can serve as organic fertilizer to be used, and continuous and efficient non-pollution treatment is achieved.

The invention discloses a method for emergency handling of vehicle tire burst. The method is used for controlling the direction of a vehicle when a tire of the vehicle bursts in the running process, and comprises the following steps: a detecting step of detecting the turn angle information of a steering wheel and transmitting the turn angle information to an electric steering system by a steering wheel corner sensor; a returning step of forcibly returning the steering wheel by the electric steering system according to the turn angle information before the steering wheel rotates at an angle of more than the predetermined angle; and a releasing step of releasing the control of the electric steering system on the steering wheel after the steering wheel returns so as to allow the steering wheel to rotate, and returning to perform the detecting step.

Disclosed is an emergency treatment method of sudden typical heavy metal pollution of city water-supply source, comprising: measuring the content of heavy metal in raw water, putting a coagulant into the raw water when the concentration exceeds a certain numerical value; controlling the filtering velocity at a proper numerical value and setting down a drainage closing time point of initial filter water; and back flushing in a filter chamber. The method aims at three typical heavy metal pollutants of arsenic (As), plumbum (Pb) and cadmium (Cd) and is an emergency treatment technique developed on the basis of the general water treatment process (namely, coagulation, precipitation, filtration and sterilization) flow, and has rather broad applicable range and strong utility value; and secondly, the method can maximally reduce the time of water supply stopping; and has strong reliability, and can well control the three typical heavy metal pollutants of arsenic (As), plumbum (Pb) and cadmium (Cd), and can also properly control other water quality indexes such as turbidity degree, COD(Mn), disinfection by-products, total manganese, total iron, total aluminum and pH value.

The invention discloses an emergency treatment method of hydrogen sulfide in an unbalanced drilling fluid ground circulating system, which relates to the technical field of petroleum exploitation and drilling process. The hydrogen sulfide in drilling fluid returned in a well is monitored in real time, a drilling fluid treatment control process is controlled by virtue of three emergency guarantee methods of adding a desulphurizing agent, bypass refluxing and circularly re-charging when a ground separation system cannot completely separate toxic and harmful gases, the drilling fluid can also be processed by combining various methods provided by the invention, so that the harm of the volatilization of toxic and harmful gases such as hydrogen sulfide into a solid control system on the personnel and the environment can be maximally avoided.

The invention discloses an emergency treatment method for kitchen waste, which comprises the following steps of: accommodating the collected kitchen waste by using a receiving bucket, and dividing into two paths by using a first conveyor; sequentially conveying one path of solid materials to a sorting machine, a presser and a second conveyor to reach a container, and conveying to a landfill site for landfill; and collecting the other path of liquid materials by using a receiving groove, sequentially conveying to a first heater for heating through a sedimentation tank and an original basin, and conveying into a three-phase horizontal centrifuge, conveying the separated light liquid to an oil-separating basin, heating by using a second heater, and conveying to a vertical centrifuge for oil-water separation, conveying waste water to a waste water basin, and conveying oil to an oil storage tank. The emergency treatment method can perform emergency and rapid treatment on the kitchen waste through a simple and short treatment process, avoids the influence on municipal waste treatment when a normal treatment device is under the repair or maintenance condition, and has a rational and practical process.

The invention discloses an underground reservoir with an emergency water draining device. The underground reservoir comprises a dam body and a working face gob area, wherein the working face gob area is formed in coal mining and is used for storing water; the dam body comprises a coal pillar dam body and an artificial dam body; the coal pillar dam body and the artificial dam body surround the working face gob area to form closed water storage space; the artificial dam body is provided with the emergency water draining device; and a filter screen is arranged on the back side of the artificial dam body. The invention also discloses a safe emergency treatment method for the underground reservoir. By the underground reservoir and the safety emergency treatment method for the underground reservoir, emergency water drainage is realized by the emergency water draining device, and the underground reservoir can run safely under emergency situations of mine earthquake, mining and sudden caving of caving zones.

The invention discloses an emergency cabin of a battery swap station, and an emergency treatment method of power batteries in the battery swap station. The emergency cabin is used for conducting emergency treatment on the abnormal power batteries in the battery swap station; and the emergency cabin is provided with an anti-explosion device which is used for monitoring the abnormal power batteriesand conducting emergency treatment on the power batteries according to the monitoring situation. Thus, the anti-explosion device capable of monitoring the power batteries is arranged in the emergencycabin, the power batteries having the hidden danger can be treated in time through the anti-explosion device, and thus the reliability of the emergency cabin can be reasonably improved.

The invention discloses an air plane capable of emergently solving air crash and an emergency treatment method. A plurality of hooks are arranged at the lower margin of cockpit and passenger cabin, corresponding necks are arranged at the upper margin of belly, a separation parachute is open, a locating locking pin is started, the separation parachute drives the locating locking pin to be separated from the air plane body, a drag parachute is open, speed difference is utilized to drive the air plane entire passenger cabin and cockpit to shift backward, so that the hook is separated from the neck on the belly to be fixed, safety parachutes in cockpit and at the top of each passenger cabin are open, the safety parachute drags out the cockpit and the passenger cabin from the neck on the belly to be separated from the belly, and the cockpit and each passenger cabin are respectively safely landed under the action of respective safety parachute. By adopting the technical scheme, lives of the whole pilots and all the passengers are effectively rescued, accident cause is found as soon as possible, air safety is further improved, and the fact that almost no one is survived after crash becomes history.

The invention discloses an emergency treatment method for landslides in tunnel working faces. Two arch beams are continuously supported by single hydraulic props in the safety section, and I-steel wedge beams are placed on the arch beams to push into the working face of the collapse area; Place the bearing body on the upper part of the I-steel wedge beam in the collapse section, so that the height of the bearing body is slightly higher than the grid steel frame of the initial support; place a waterproof metal grid bearing body horizontally above the bearing body, and pump the pipe pump through the concrete pump Concrete delivery; remove the concrete pumping pipe, concrete height detection pipe, and exhaust pipe; after the concrete is consolidated, remove and cut the bearing body close to the safety section, and quickly carry out initial support for the collapse section; quickly and effectively support the collapse section , to make up for the defects of commonly used tunnel collapse emergency treatment equipment, better meet the emergency treatment requirements of tunnel collapse, and provide construction conditions for subsequent tunnel collapse treatment.

This invention relates to robot controller CPU fault test and emergency process method, which converts the frequency signals of normal work into voltage signals through frequency transducer and enlarges the voltage signals through amplifier and the drive relay outputs indication device normal signals; when in fault, relay not outputting and indicating fault. The emergency process method is to use relay output signal to control robot output drive axis and to monitor robot work status to indicate controller CPU abnormal.

The invention relates to the technical field of intelligent medical treatment, in particular to an emergency treatment system, an emergency treatment method and electronic equipment. The emergency treatment system comprises an information acquisition terminal which is deployed in an ambulance and is used for acquiring medical data of a to-be-treated object and uploading the medical data to a data lake cluster; a data lake cluster which is used for performing data access, data processing, data storage and data distribution on the medical data of the to-be-treated object; and a medical service system which is used for acquiring the medical data of the to-be-treated object from the data lake cluster.

The invention discloses an emergency treatment method for sudden thallium pollution of drinking water in a water source area. Enhanced coagulation-filtration combined technology is adopted by the method, calcium oxide is added into polluted raw water to cause the polluted raw water to be alkaline, a coagulating agent of ferric trichloride is then added, Fe<3+> and a prepolymerization product thereof are rapidly hydrolyzed by means of the reaction that a ferric ion and a hydroxyl react to generate ferric hydroxide flock, before the flock becomes larger, TI<3+> in the polluted raw water is adsorbed on the surface of the flock to form covalent bonds, and the process is very fast; in a few minutes, the flock grows larger and continues adsorbing the TI<3+> in the polluted raw water, and simultaneously, the TI<3+> and the Fe<3+> in the polluted raw water are subjected to coprecipitation reaction to further remove the TI<3+>. The method provided by the invention is easy to implement, convenient in operation, and capable of reducing the TI<3+> at the concentration not less than 10mu g / L in the polluted raw water to the concentration not greater than 0.01mu g / L, and has the characteristics of safety, reliability, and highly qualified yielding water.

The invention provides an emergency processing method and system for sudden accidents of a maritime hazardous chemicals. The method comprises the following steps: acquiring report information of a sudden accident of the maritime hazardous chemicals; according to the reported information and a maritime hazardous chemicals comprehensive database, determining the accident level of the sudden accident of the maritime hazardous chemicals; after the reported information is verified to be correct, according to the accident level and the reported information, performing inquiring to obtain an emergency scheme required for processing the sudden accident of the maritime hazardous chemicals; and starting an accident emergency response process according to the emergency scheme. According to the invention, whole-process visual management and control are carried out on the sudden accidents of the maritime hazardous chemicals, and auxiliary decision support is provided to solve the sudden accidents of the maritime hazardous chemicals.

The invention discloses a search and emergency treatment method for offshore crude oil leakage of an unmanned aerial vehicle and relates to the field of unmanned aerial vehicles. A ground station control system and an unmanned aerial vehicle flight control system installed in on an unmanned aerial vehicle body are included, wherein an image acquisition module, an image storage module and an image transmission module are arranged in the unmanned aerial vehicle flight control system, the unmanned aerial vehicle is utilized to perform information and data acquisition, and the ground station control system performs data processing and performs information confirmation on a crude oil leaked area. Therefore, artificial participation is small, the automation degree is high, and oil absorption treatment is performed on the crude oil leaked water area instantly.

The invention discloses a landscape water body emergency treatment method based on a magnetic loading coagulation technology. The landscape water body emergency treatment method comprises the following steps: (1) guiding the landscape water body to be treated into a reaction tank, orderly feeding magnetic powder and polyaluminum chloride to the reaction tank, and stirring for 30-90 seconds under the condition of a stirring speed of (80-200)r / min; (2) adding polyacrylamide and stirring for 4-10 minutes under the condition of a stirring speed of (40-80)r / min; stopping stirring, and after static settling for 25-60 minutes, discharging clear water, discharging sludge from the reaction tank and recovering the magnetic powder. The landscape water body emergency treatment method based on the magnetic loading coagulation technology is simple to operate, low in dosage of a coagulant, high in coagulation efficiency, short in floc static settling time and good in water yielding effect. The precipitation of suspended solid substances is accelerated by virtue of magnetic loading, and therefore, pollutants in the water can be effectively removed; the recovered magnetic powder can be recycled and can be applied to improvement of the water quality of the landscape water body, particularly emergency treatment.

The invention discloses a vehicle-mounted mobile landfill leachate emergency treatment method which comprises the following steps: arranging a mobile vehicle-mounted landfill leachate emergency treatment system, and firstly carrying out nanofiltration treatment on leachate; subjecting the nanofiltration effluent to nitrosation anaerobic ammonia oxidation treatment, subjecting the nanofiltration concentrated solution to polyferric coagulation treatment, and mixing supernatant and the nitrosation anaerobic ammonia oxidation treatment effluent for subsequent advanced treatment; treating in a denitrification aeration biological filter chamber and then carrying out denitrification treatment; and introducing the wastewater into an ozone aeration biological filter chamber to decompose, destroy and carbonize refractory organic matters, further removing residual organic matters and ammonia nitrogen in the wastewater, and finally discharging the effluent after reaching the standard. The invention further discloses a system for implementing the method. The system is an integrated system in which all the components are arranged in a container, so that vehicle-mounted movement and operation are facilitated. No concentrated solution is discharged, no external carbon source is needed, the aeration rate is reduced, the sludge yield is low, and the method is suitable for emergency treatment.

The invention relates to a water treatment method, particularly a drinking water emergency treatment method for water source sudden ammonia nitrogen pollution. The method aims to solve the problems of poor removal effect and high disinfection byproducts in the raw water sudden ammonia nitrogen pollution in the water supply plant conventional treatment technique. The method comprises the following steps: a. mixing pretreated activated carbon with a NaOH solution, oscillating the mixture on an oscillating table at room temperature for 24-26 hours, washing with deionized water to a neutral state, drying, and activating in a muffle furnace, thereby modifying the powder activated carbon; b. adding a sodium hypochlorite solution in water according to the ClO<->:NH4<+> mole ratio of 1:(3-5) to be combined with ozone so as to remove the ammonia nitrogen pollution in the water; and c. adding the NaOH-modified powder activated carbon into the raw water subjected to ozone oxidation, and carrying out dechlorination. After the micropolluted raw water is treated by the method, the maximum ammonia nitrogen removal ratio can reach 89.28%. The treatment method is simple to operate, and has the advantages of high operating efficiency, high work reliability and wide popularization prospects.

The invention relates to an emergency disposal system and an emergency disposal method for network security events. The system comprises a data collection module, an event management module, an eventdisposal module, an auxiliary tool module and an expert knowledge base module. The basic information of network security event is input and the security detection is carried out by using auxiliary tool module, The data acquisition module collects information, searches implanted files by using auxiliary tool module and inputs them into the system, the event disposal module analyzes and obtains theclue tree and attacker information, confirms the analysis results based on the information of expert knowledge base module, determines the nature of the event, draws the rectification suggestions andissues the event disposal report, and rectifies the event. The invention establishes a standard network safety incident emergency treatment process, standardizes the incident treatment means and method, improves the treatment efficiency, avoids the expansion of harm, reduces the economic loss, integrates information collection, analysis and rectification into one, automatically analyzes, generatesrectification suggestions, generates reports, retains the treatment results, and facilitates access.

The invention relates to the technical field of valet parking, in particular to a valet parking vehicle fault emergency processing method and a system and an automobile. The system applied to the valet parking vehicle fault emergency processing method comprises a controller used for monitoring communication between control modules of different CAN buses; the method comprises the following steps: monitoring signal transmission among CAN bus control modules of a valet parking vehicle; if it is detected that the signal transmission is abnormal, detecting and obtaining abnormal condition information of the signal transmission; according to the abnormal condition information, obtaining an abnormal control instruction; and sending or executing the abnormal control instruction, and controlling the vehicle to park safely. According to the invention, when different CAN bus control modules carry out communication, the controller controls the CAN bus control modules to carry out communication; the transmission signal is monitored in real time, when the signal transmission of the control module is abnormal, the abnormal reason is judged and the parking scheme is formulated according to scenes,and when the automobile key control module fails, emergency take-over and safe parking are carried out through the controller, so that the safety of the vehicle in the valet parking process is ensured.

The invention discloses a rapid emergency treatment method of large-scale tunnel collapse. The rapid emergency treatment method comprises the following steps that a section, wherein an initial supportor a second lining is constructed, of a collapse body is temporarily strengthened by adopting I-steel; the collapse surface is closed by anchor-net concrete spraying; a steel perforated pipe is usedfor grouting reinforcement of the collapse body, an advanced small pipe and an advanced big pipe shed are constructed on the arch of the collapse body section, and advance grouting reinforcement is carried out; an arch rescue pilot tunnel part I is excavated, a reinforced collapsed body on one side of the collapsed body is excavated in layers, and radial small pipes are constructed on side walls for grouting reinforcement; a part II, a part III, a part IV, a part V, a part VI and a part VII of the collapse body are excavated in layers and in parts, excavation is carried out in layers and parts, and a steel arch frame is erected; according to the monitoring measured data, temporary vertical supports and temporary transverse supports are removed step by step, and a secondary lining structureis constructed in time; and surface collapse pits are backfilled and a surface drainage system is treated, and the construction of a front tunnel face in a tunnel is restored. The rapid emergency treatment method has the characteristics of safety, rapidity, high efficiency and low cost.

The invention provides a vinyl acetate storage device, which comprises a vinyl acetate storage tank, a vinyl acetate material feeding valve, a temperature detecting device, a cooler and a standby device, wherein the vinyl acetate material feeding valve and the temperature detecting device are arranged on the vinyl acetate storage tank, and the vinyl acetate storage tank is connected with the standby device via the cooler. When the vinyl acetate storage device is used for storing crude vinyl acetate, reasonable emergency treatment temperature is set and effective emergency treatment measurements are put forward for the crude vinyl acetate stored in the vinyl acetate storage device during operation and stoppage of the vinyl acetate storage device, so that flash polymerization danger of the crude vinyl acetate stored in the vinyl acetate storage tank facing incontrollable polymerization is eliminated, and flash polymerization accidents are prevented.

The invention relates to a continuous and rapid emergency treatment method of methyl mercaptan odor by employing chemical absorption and utilizing an oxidation method. The method comprises the following steps: absorbing methyl mercaptan odor under the normal temperature and normal pressure reaction conditions by utilizing alkali liquor with the pH of not less than 11, and oxidizing and removing the methyl mercaptan odor by utilizing peroxymonosulfate. The method has the advantages that the alkali liquor absorption and oxidation removal advantages are combined, and the methyl mercaptan odor which is difficult to dissolve and treat is treated in the odor; the methyl mercaptan can be fully oxidized and is difficult to transfer; the peroxymonosulfate and the methyl mercaptan reaction is fast and is instantaneously carried out, secondary pollution is avoided, and the method is suitable for performing rapid emergency removal on the methyl mercaptan odor in the accident under alkaline conditions; continuous air suction can be kept in the reaction system, and the gas is continuously recycled; the reaction conditions are mild under normal temperature and normal pressure; and the method is easy to operate and good in treatment effect.

The invention provides a shale gas fracturing flow-back fluid emergency treatment method, which can carry out reduction emergency treatment when a flow-back fluid amount exceeds a storage capacity greatly or heavy rainfall occurs so as to eliminate the risk of overflowing, and comprises the following steps: detecting the mineralization degree of a flow-back fluid in a flow-back fluid storage pool;when the mineralization degree of the flow-back fluid is below 45000 mg / L, introducing the supernatant of the flow-back fluid in the flow-back fluid storage pool into a quick mixing pool, and addinga pH regulator and a coagulant into the quick mixing pool; introducing the supernatant in the quick mixing pool into a reaction pool, and adding a softener; introducing the supernatant in the reactionpool into a flocculation pool, and adding a flocculating agent; introducing the supernatant of the flocculation pool into a tubular microfiltration membrane, and carrying out solid-liquid separation;adding NaClO into the clear liquid separated by the microfiltration membrane, and carrying out oxidation treatment; and adding NaHSO3 into the effluent after oxidation treatment to reduce the contentof residual chlorine, adding HCl to adjust the pH value, introducing the effluent into a reverse osmosis system, and carrying out desalination treatment to respectively generate fresh water and strong brine, wherein the fresh water can meet the discharge requirement.

The invention relates to the technical field of adverse drug reaction monitoring, managing and analyzing methods, and particularly relates to an adverse drug reaction monitoring, managing and analyzing method. The method comprises the steps that S1, a multi-stage feedback system is established; S2, adverse reaction information is collected; S3, information is split and sorted, and saved information is analyzed by an analysis module in a detecting feedback system of a database where the adverse reaction information is saved; S4, information is classified and sorted based on big data; S5, an adverse reaction is determined to be a conventional or abnormal situation, S6 is started when the adverse reaction is determined to be an abnormal case, and S7 is conducted when the adverse reaction is determined to be a conventional case; S6, an emergency treatment method is adopted; S7, a conventional treatment method is adopted; S8, filing and sealing up for safekeeping are conducted. The method has the advantages that the multi-stage feedback system is adopted to collect the adverse reaction information, automatic classifying and analysis of the information are conducted through the analysismodule, the efficiency is high, and the abnormal situation can be rapidly responded.

The invention discloses a hall-free method for starting a servo motor. The hall-free method includes steps of firstly, perturbing the servo motor and sequentially providing basic torque vectors; and secondly, judging an electric angle sector where a rotor is currently located according to a turning result fed by an incremental encoder, providing an electric angle initial value and switching the rotor to be under conventional field-oriented control. Only a tiny perturbation test is required when the motor is electrified and started for the first time, normal operation of a sewing machine is hardly affected, and accordingly the method can be used as an emergency treatment method when the sewing machine cannot be used due to damage of a hall sensor. The hall-free method has the advantages that the perturbation test is carried out for the servo motor, and the location of the rotor is judged by the aid of output of the encoder, so that the rotor can be switched to be under the conventional field-oriented control, the motor is started, operation is simple and convenient, and the production efficiency is high.