145results about How to "Control start and stop" patented technology

This invention relates to a method for fault diagnosis data collection and issuance including: 1, classifying the important data related in the fault diagnosis system: sample data, matching data and state control data, 2, classifying the data collection and issued related operation into two: Get and Set, 3, setting up service models of fault diagnosis and a detection system, 4, realizing interfaces of five services at the intermediate module in a data collection end network, 5, realizing the call interfaces of five services in the intermediate module of a user monitor end network, which is advantaged at supporting the dynamic changes of a network structure to finish the automatic configuration of moving in and out of the data collecting end and remote controlling target devices by networks.

The invention relates to an intelligent control and energy conservation optimization algorithm for an underground water pump. The intelligent control and energy conservation optimization algorithm is particularly applicable to drainage of an underground water pump in a coal mine. The intelligent control and energy conservation optimization algorithm is characterized by comprising a PLC control cabinet, a field sensor, an upper computer, on-site operation boxes, a frequency converter and a detection instrument, wherein the PLC control cabinet and the upper computer are core parts of an intelligent control system, communicate with display screens of the on-site operation boxes, control the process of starting and stopping of the water pump, observe relevant parameters, and set a working mode of the water pump; and the field sensor and the detection instrument form a detection unit of the system used for acquiring field data.

The invention provides a control system and method for a vehicle air compressor. The control system comprises an air compressor, a dryer, a gas storage cylinder unit and a pneumatic brake valve whichare connected in sequence, a dryer pressure switch in circuit connection with the dryer, a gas storage cylinder pressure switch in circuit connection with the gas storage cylinder unit, a pressure sensor for detecting gas pressure at the gas brake valve, a detecting unit for detecting the state of a dryer pressure switch and a gas storage cylinder pressure switch, and a whole car controller configured to control the air compressor to be operated when the dryer pressure switch and the gas storage cylinder pressure switch are turned off and the pressure value at the gas brake valve is smaller than a first gas pressure value. The problems that in the prior art, the operation status of the air compressor is controlled only through the detection condition of the pressure sensor, so that starting and stopping of the air compressor are not accurate, and unloading of the air dryer is not accurate are solved.

The invention relates to the technical field of dust collection and particularly discloses a dedusting device for a computer. The dedusting device for the computer comprises a dedusting cylinder. A handle fixed to the dedusting cylinder is arranged at the top of the dedusting cylinder. A motor is mounted in the handle. A negative-pressure cavity is formed in the upper portion of the dedusting cylinder. A dust collection cavity is formed in the lower portion of the dedusting cylinder. A piston is arranged in the negative-pressure cavity. A first air inlet one-way valve and a first exhaust one-way valve are arranged at the top of the negative-pressure cavity. A second air inlet one-way valve and a second exhaust one-way valve are arranged at the bottom of the negative-pressure cavity. Both the first air inlet one-way valve and the second air inlet one-way valve communicate with the dust collection cavity. The lower end of the dedusting cylinder is rotatably connected with a dedusting disc. A brush is arranged on the dedusting disc, and a through hole communicating with the dust collection cavity is formed in the dedusting disc. A driving shaft which is fixed to the piston and penetrates through the negative-pressure cavity and the dust collection cavity is arranged in the dedusting cylinder. The dedusting disc is made to rotate back and forth when the driving shaft reciprocates relative to the dedusting disc, and the motor can drive the driving shaft to reciprocate. The dedusting device has both a dedusting function and a dust collection function, and thus, the dedusting effect is better.

The invention provides an automatic tunnel waterproof material laying and hanging construction trolley which comprises a rack, tires, a driving system, an executing mechanism, an arrangement mechanism and a master control console. The tires are rotatably installed at the bottom of the rack, the master control console is installed on the rack, the driving system comprises a driving motor and an oil pump, the executing mechanism comprises a rocker arm spindle, a first telescopic rod, a second telescopic rod, a pushing beam and a pushing rod, the driving motor drives the rocker arm spindle, the first telescopic rod is installed at the first end of the rocker arm spindle, the second telescopic rod is installed at the second end of the rocker arm spindle, one end of the pushing beam is connected with the first telescopic rod, the other end of the pushing beam is connected with the second telescopic rod, the pushing rod is installed on the pushing beam. The arrangement mechanism comprises an arrangement beam, wherein one end of the arrangement beam is fixedly installed on the first telescopic rod, and the other end of the arrangement beam is fixedly installed on the second telescopic rod. The flatness and looseness during laying and hanging of a preliminary-stage supporting surface isolation layer of a tunnel are guaranteed, and the problems of lining void and the like caused by swelling of waterproof plates at a later construction stage are avoided.

The invention discloses an intelligent robot monitoring system and method based on TM30. The system comprises an automatic monitoring unit, a wireless signal transmission unit, a walking driving unitand a danger alarm unit, wherein the automatic monitoring unit is used for monitoring surrounding rock convergence deformation of a monitoring point, the wireless signal transmission unit comprises asignal processing module and a signal transmission module which are connected, is used for controlling robot stop / start, signal processing and signal transmission and realizes remote distance transmission of signals under the complex environment in a tunnel, the walking driving unit is used for carrying out precise positioning of a monitoring station and making the robot to safely move forwards inthe complex environment in the tunnel and accurately arrive the position of the monitoring station, and the danger alarm unit is used for carrying out automatic alarm for monitoring data abnormalityand dangers according to the monitoring result.

The invention discloses a peritoneal dialysis treatment device and an operation method thereof, wherein the peritoneal dialysis treatment device comprises an irrigation and drainage channel, a waste drain channel and a liquid supply channel, the irrigation and drainage channel is connected with the abdominal cavity of the human body, the waste drain channel is used for draining the liquid in the irrigation and drainage channel drained from the abdominal cavity, the liquid supply channel is connected with a liquid bag which is used for holding dialyzate, each of the irrigation and drainage channel, the waste drain channel and the liquid supply channel is correspondingly connected with one of three liquid flow holes which are non-uniformly formed in a three-way valve, and each two channels are connected under certain state. The irrigation and drainage channel is further provided with an irrigation and drainage pump which is a bidirectional pump, and the liquid supply channel is further provided with a heater which is used for heating the dialyzate and a heating pump which is used for pumping the dialyzate to the heater. The peritoneal dialysis treatment device and the operation method thereof overcome the disadvantages of complex transfusion system structure, high processing precision requirement and complex operation of the existing peritoneal dialysis machine and have advantages of simple structure, easiness in processing and convenience in operation.

The invention relates to an air conditioning control panel system of an electrombile and a control method thereof. The air conditioning control panel system of the electrombile comprises an air conditioning control panel, a positive temperature coefficient (PTC) heating element and a fuel oil heater, wherein the PTC heating element and the fuel oil heater are installed on a finished electrombile and used for heating the finished electrombile. The air conditioning control panel is in control connection with the PTC heating element and the fuel oil heater and used for judging whether the PTC heating element or the fuel oil heater is assembled on the finished electrombile and for sending out corresponding start-up information to start up the PTC heating element or the fuel oil heater.

The invention provides an alternating current charging pile control system. The system is characterized by comprising an MCU main control chip, and the MCU main control chip adopts STM32F427VGT6, andis respectively connected with a power supply circuit, an output short circuit detection circuit, a temperature sampling circuit, a communication module, a relay control circuit, an adhesion detectioncircuit, an AC leakage protection circuit, a DC leakage protection circuit, a CP sampling circuit, a man-machine interaction module, an electric energy metering circuit, a voice function module, a grounding detection circuit, a reserved interface circuit, an emergency stop switch circuit and a lightning protection circuit. According to the invention, functions of overvoltage protection, overcurrent protection, undervoltage protection, electric leakage protection, short-circuit protection and lightning protection are realized; and the system has a charging expansion protection function: the MCU tries to realize over-temperature protection at the interface through a temperature detection circuit at a charging connector connection interface. The protection function is the function lacked bythe existing charging equipment and is also the urgently needed function, and the potential safety hazard caused by the lack of the function is often exposed in the existing products in the market.

The invention provides a water heater and a control method thereof. The water heater comprises a water tank, a compressor, a four-way valve, a coiled pipe, a throttling device, a heat exchanger, an electromagnetic valve, a check valve, a first temperature sensor, a second temperature sensor, a third temperature sensor, a detection device and a controller; the controller is connected with the electromagnetic valve, the four-way valve, the first temperature sensor, the second temperature sensor, the third temperature sensor and the detection device; the opening or closing of the electromagnetic valve or the switching of the four-way valve is controlled by the controller according to the exhaust temperature, the environment temperature, the temperature of the heat exchanger and the operation time of the compressor. According to the water heater, the electromagnetic valve is added, the reversing is not performed through the four-way valve and the heat bypass defrosting is performed when the electromagnetic valve is controlled by the controller to be opened, the four-way valve is energized for reversing and the reverse cycle defrosting is performed when the electromagnetic valve is closed, the two defrosting modes are implemented, and accordingly the loss of the heat is reduced, the defrosting of the water heater can be high in efficiency, and the use comfort of the product is improved.

The invention provides a water pump total-lift work control method. A pressure sensor is used for detecting the running pressure of a water pump, a controller is used for automatically calculating the stop pressure of the water pump, and starting and stopping of the water pump are controlled. The total-lift work control over the water pump is achieved, the starting and stopping frequency of the water pump is reduced, and the stable water supply pressure is provided for a user. Meanwhile, a water pump water shortage detection method and a water supply system water leakage detection method are provided. The invention further provides the controller and the water pump controlled by the water pump total-lift work control method; the controller has the function of controlling the starting and stopping of the water pump through the water pump total-lift work control method; and the water pump has the beneficial effects that the starting and stopping frequency is low, the structure is simple, the water supply pressure is stable, and cost is low.

The invention discloses a texturing machine. The texturing machine comprises a plurality of machining spots, wherein the machining spots are in butt joint and are used for stretcher strain of filaments. Each machining spot is internally provided with a drafting, texturing and winding operation unit. At least one operation unit in each machining spot is provided with an independent transmitter of a motor. Each independent transmitter is provided with a driver and is composed of the motor of which a rotor is a permanent magnet with non-exciting current and a stator is a multi-phase winding. The drivers detect current of the multi-phase windings of the motors and calculate counter electromotive force voltage to obtain the position information of the rotors, and main controllers in communication with the drivers obtain the real-time speed of the motors through the position information of the rotors. The drivers can obtain detailed position information of the rotors while keeping high-speed and stable operation of the motors in a sensorless control mode, it is unnecessary to additionally arrange rotor position sensors or speed measurement sensors, feedback deflection caused by installation angles of the sensors or changes of environment temperature is reduced, the rotation speed of the independent transmitters can be monitored in real time, and closed-loop control can be achieved through speed feedback.

The invention provides a multifunctional handle for a hay mower and the hay mower with the multifunctional handle, belonging to the technical field of gardening tools. According to the multifunctionalhandle, the technical problems that an existing hay mower is convenient to use and the like are solved. The handle comprises a U-shaped handrail frame, wherein a mounting seat is arranged in the middle of the handrail frame, an operation panel inclining towards an operator is fixedly arranged on the mounting seat, and at least three control buttons are arranged on the operation panel; a triggering switch, a walking control switch S, a main motor control switch A and a main motor control switch B are respectively arranged on the mounting seat; a left control rod and a right control rod which are used for triggering the walking control switch S are respectively arranged on two sides of the mounting seat; and an activating key for triggering the main motor control switch A is arranged on themounting seat, an upper operation rod is movably connected to the upper side of the mounting seat and is used for triggering the main motor control switch B, and the triggering switch can be triggered by one control button on the control panel. According to the multifunctional handle, the parts are reasonably distributed, the operation is convenient, and the control is reliable.

The application discloses an intelligent liquid level monitoring method and system for an urban underground utility pipe gallery. The method includes the following steps: adopting an optical detectiondevice to detect a liquid level value of a liquid level sampling point that is expressed by optical signal data in a utility pipe gallery in real time; after the liquid level value corresponding to the optical signal data reaches an early warning value, not starting a drainage system, but continuing to judge whether the liquid level value is maintained within an early warning range during a T time period from the current moment when the early warning value is reached; only when determining that the liquid level value is maintained within the early warning range during the T time period, determining that the liquid level reaches the warning liquid level; and at this time, generating a control instruction to control the drainage system in the utility pipe gallery to initiate a drainage process. Therefore, according to the method and the system provided by the embodiment, the liquid level value is continuously judged after the liquid level value reaches the early warning value, the phenomenon that the liquid level exceeds the standard can be determined only when the liquid level value is maintained within the early warning range during the T time period, so that more accurate liquidlevel monitoring can be realized, the start-up and shutdown of the drainage system can be accurately controlled, and the waste of electric energy can be reduced since the number of start-up and shutdown times of the drainage system is reduced.

The invention discloses a zinc-air battery pack employing vertical circulation of an electrolyte. The zinc-air battery pack comprises a box body, a top plate, zinc electrode support frames, zinc anode plates, zinc electrode conducting plates, an anode terminal, air cathode plates, an air electrode conducting plate and a cathode terminal. The zinc anode plates and the air cathode plates are arranged at an included angle which is greater than 0 and smaller than 180 degrees from the horizontal plane, so that the defect of insufficient current intensity caused by an electrode putting way is improved. Meanwhile, a detachable form is adopted by the zinc anode plates and the air cathode plates, so that late maintenance, replacement and disassembly are relatively simple and convenient. Certain gaps exist between the zinc anode plates and the air cathode plates; after the height of the horizontal liquid level of the electrolyte exceeds the heights of the zinc anode plates, the electrolyte drops down along the gaps in a form similar to a waterfall due to the action of gravity; the electrolyte contacts the zinc anode plates and the air cathode plates in the dropping process; and batteries are discharged immediately. Therefore, the space utilization rate of the battery pack is improved; and relatively high current density is generated.

The invention discloses an unmanned ship resource sharing method and device, and the device comprises a GPS receiving and transmitting antenna, a communication radio station, a first data processing apparatus, an information collection and recognition apparatus disposed on an unmanned ship, and a second processor for analyzing the data. The method comprises the following steps that an unmanned ship renter sets task parameters; a task platform carries out the judgment and analysis of the task information and screens out an unmanned ship; the unmanned ship carries out the further judgment of the task information, and screens out a task; the task is fed back to the task platform and a mobile terminal of the unmanned ship renter. According to the invention, the device and method can carry out the reasonable scheduling, achieve the data sharing, guarantee that all to-be-rented unmanned ships can be scheduled reasonably, reduce the resource waste, can adjust and optimize the resource configuration of each unmanned ship according to the task parameters of a user, and achieve the sharing of the unmanned ship resources.

The invention provides an escalator safety protecting system. The escalator safety protecting system comprises an escalator, a motor module, a control module, a detecting module, a communication module and a sterilization module; the control module is connected with the escalator, the motor module and the detecting module through the communication module; the control module is a single chip microcomputer; the detecting module is arranged on a handrail strap of the escalator; the sterilization module is arranged at the position, close to an inflow opening or an outflow opening, of the handrail strap of the escalator; an ultraviolet sterilization lamp is arranged in the sterilization device. According to the escalator safety protecting system, a touch single is detected by utilizing a touch sensor; the start and the stop of the escalator are controlled; the energy is effectively saved; energy waste produced under a no load condition is prevented; people are required to hold by hands all the time when the people take the escalator, so that the falling caused by unstable weight gravity because of an escalator fault is prevented; the handrail is sterilized by utilizing the ultraviolet lamp, the healthy and safety of the people are effectively ensured; equipment is simple, convenient to use, and high in intelligent degree.

The invention provides a glass dynamic grouping control system and method for a float glass production line, and relates to the technical field of glass production. The glass dynamic grouping controlsystem comprises a first branch roller way, a second branch roller way, a third branch roller way, a photoelectric switch used for generating a photoelectric signal when detecting the float glass to be grouped, and a control module for controlling the first branch roller way, the second branch roller way and the third branch roller way to operate when receiving the photoelectric signal for the first time, wherein when the rear edge of the glass moves to a first preset position, if the length of the glass is greater than a length threshold, the second branch roller way and the third branch roller way are controlled to decelerate, and if not, the second branch roller way is controlled to decelerate, when the photoelectric signals are received again and the to-be-grouped float glass conveyedtwice is not in one group, the second branch roller way and the third branch roller way are controlled to operate, and when the photoelectric signals are received again and the to-be-grouped float glass conveyed twice is in one group and the front edge of the glass operates to a second preset position, the second branch roller way and the third branch roller way are controlled to operate. The glass dynamic grouping control system can be used for grouping glass of any specification and can control the grouping distance.

The invention provides a sectional type additional heating device used for an electronic direct cooling refrigerator. The sectional type additional heating device used for the electronic direct cooling refrigerator comprises a first compensating heater fixedly arranged on a refrigerating chamber evaporator aluminum plate and a second compensating heater fixedly arranged on a refrigerating chamber inner container around a refrigerating chamber temperature sensor. As the refrigerating chamber evaporator and the periphery of the refrigerating chamber temperature sensor are heated at the same time, the temperature of the refrigerating chamber rises again integrally and uniformly; as the refrigerating chamber temperature sensor can sense temperature change of the refrigerating chamber in time and rapidly, the start and stop of a compressor can be controlled efficiently and reasonably even at the presence of a relatively low environmental temperature, the normal start-stop ratio of the compressor is realized, and consequently the use demands of a user can still be met at the presence of the relatively low environmental temperature.

Provided in the invention is an automatic cooker comprising a drum pot rotationally arranged in a shell. The rear end of the drum pot is connected with a rotating shaft; the rotating shaft rotates clockwise or anticlockwise by 360 degrees through a motor. More than one slice is arranged in the drum pot; the rotating shaft matches and is connected with the slice; a scraping blade is arranged at thetop or the bottom of the slice; an included angle A is formed between the slice and the scraping blade; the outer side of the slice and the outer side of the scraping blade are close to the inner wall of the drum pot respectively; a gear set is arranged on the rotating shaft, the rotating shaft drives the drum pot, the slice and the scraping blade to rotate simultaneously through the gear set, and the rotating directions of the drum pot and the slice are opposite or the same so that relative movement can be formed among the drum pot, the slice and the scraping blade. According to the automatic cooker, under the condition that the size of the cooker body is not increased, the rotating shaft drives the drum pot, the slice and the scraping blade to rotate at the same time through the multiple gears, so that the performance of the automatic cooker is improved.

The invention relates to the technical field of marine equipment, in particular to a marine controllable open-type aquaculture water tank circulating water system device. The device comprises an aquaculture tank and a seawater tank, wherein the aquaculture tank is divided into four aquaculture areas which can communicate with one another, a water outlet leading to seawater outside a ship is formed in the bottom of each aquaculture area, the seawater tank is installed on the side of an aquaculture work ship, and communicates with each aquaculture area, seawater in the seawater tank is pressurized and conveyed into each aquaculture area through a seawater pump, annular water flow from top to bottom is formed in each aquaculture area, and the annular water flow tends to flow to the water outlets. The device is simple in principle, can be suitable for aquaculture water tanks of various sizes, can form a stable flow field in the tanks, is good in energy-saving effect, and well provides the most suitable aquaculture environment for live fishes.

The invention relates to the technical field of automobile safety belt devices, in particular to a safety belt curling apparatus and a retractor with the safety belt curling apparatus. The safety beltcurling apparatus comprises a main curling spring assembly, a sub-curling spring assembly and a control disc assembly; according to the safety belt curling apparatus and the retractor with the safetybelt curling apparatus, the sub-curling spring assembly does not start when a safety belt is pulled out by arranging the sub-curling spring assembly generating reverse torsion relative to the main curling spring assembly and the control disc assembly controlling the sub-curling spring assembly to generate the reverse torsion on the basis of the main curling spring assembly to guarantee the safetybelt can be normally pulled out; when the belt is pulled out to a certain position and recovers and tightens, the control disc assembly can control the sub-curling spring assembly to generate a portion of torsion to resist tightening of the safety belt, so that force of the safety belt on human bodies is not so big, comfortableness is higher during wearing, and strapping sense does not come intobeing.

The invention relates to a handheld infrared flaw detector and a detection method thereof. The infrared flaw detector comprises a shell as well as an infrared thermal imager and an air supply apparatus which are fixed in the shell, wherein the air supply apparatus comprises an electric heating wire, an electric heating wire installation frame and an air supply member, the shell is provided with anair inlet and an air outlet, and the air supply member is fixed in the shell close to one side of the air inlet; the electric heating wire installation frame is fixed in the shell close to one side of the air outlet; and the electric heating wire is wound on the electric heating wire installation frame. For the defects of the existing flashlight-type excitation, the infrared thermal imager is combined with the air supply apparatus, a given area of a detected article is heated by adopting a hot air excitation way, while an object is heated, the temperature of the detected article is recorded and analyzed by utilizing the infrared thermal imager, and the internal defects of the object can be rapidly detected in real time, so that the weight of the entire device can be greatly reduced, and the handheld infrared flaw detector is convenient to carry, suitable for different environments and capable of greatly improving the detection efficiency.

The invention provides and designs a disposal technology and device for disposing SCR denitration catalyst regeneration in a factory. The technology comprises the steps that each working procedure of actual operation is executed starting from the procedure that an SCR catalyst module is conveyed to the factory, detection, carrying, flying ash removal, washing, acid pickling, rinsing, air drying, activation, drying, calcination and finished product packaging are performed; according to the technological process and disposal time of each working procedure, equipment is reasonably arranged, the carrying time is shortened, the number of links is reduced, time is reasonably utilized, and the production efficiency is improved; each disposal cell body is reasonably designed, control equipment is configured, a PLC control system is used, and disposal cell bodies are automatically operated, semi-automatic control over the overall disposal technology is achieved, and efficiency and disposal capacity are further improved; some water used by the technology is subjected to sedimentation, filtering and reutilization, and the cost and resources are saved; calcination and drying of a module are effectively combined together, the module is dried by means of waste heat of calcination, and energy sources are effectively saved.

The invention provides manpower saving combined anode carbon block slotting equipment. The manpower saving combined anode carbon block slotting equipment comprises a machine base, a water cutting device, an automatic fixing device, a mechanical cutting device, an automatic feeding device and a control system. The water cutting device, the mechanical cutting device and the automatic feeding deviceare transversely erected on the machine base in a sliding manner. The automatic fixing device is in sliding connection into the machine base. The water cutting device is provided with water jet cutterspraying ports and a numerical control operation platform. The mechanical cutting device is provided with a sound isolation hood, and the sound isolation hood is divided into a cooling section and acutting section. The cooling section is provided with a cooling device established on the basis of semiconductor refrigeration sheets. The cutting section is provided with a cutter changing motor, a cutter rest and cutting blades. The automatic fixing device is provided with a bent track and is divided into a transverse fixing device body and an axial fixing device body, and both-way automatic clamping is conducted. The automatic feeding device is arranged at the end portion of the machine base. The manpower saving combined anode carbon block slotting equipment is ingenious in design, excellent in effect and capable of saving manpower, lowering noise and mechanical loads and optimizing the producing and manufacturing technology.

The invention provides a self-locking transmission assembly. The assembly comprises a casing, a reel, a micro motor, a frame body and a self-locking device; the casing is a cylindrical hollow casing and is horizontally disposed, and the two ends are fixed to the frame body; the reel is a flat cylinder horizontally disposed in a hollow inner cavity of the casing, and the two ends are movably connected to the frame body through a bearing; an output shaft of the micro motor is connected to the reel, and the micro motor can drive the reel to rotate; the self-locking device comprises a ratchet, a rotating shaft, a rotating handle, a pulling wire and a resetting device; the ratchet sleeves the end surface of the reel and rotates coaxially with the reel; a plurality of convex teeth are evenly distributed on the outer wall of the ratchet; one end edge of the rotating handle is provided with a pawl, and the pawl and the convex teeth are engaged with each other; a through hole is formed in the other end of the rotating handle, and the through hole is connected with the pulling wire. The self-locking transmission assembly has a simple and reasonable structure, and the starting and closing ofa rotating device can be controlled simply and smoothly by the pulling wire.

The invention discloses an intelligent multimedia Android online teaching all-in-one machine, which comprises a box body; a rotary disc is arranged at the top of the box body; a sleeve is fixedly connected to the top of the rotary disc; a connecting rod is arranged in an inner cavity of the sleeve; a limiting block is fixedly connected to the bottom of the connecting rod; grooves are formed in thetwo sides of the limiting block; springs are fixedly connected to the sides of inner cavities of the grooves; and clamping blocks are fixedly connected to the sides, away from the grooves, of the springs. The box body, the rotary disc, the sleeve, the connecting rod, the limiting block, the grooves, the springs, the clamping blocks, the clamping groove, the all-in-one machine body, the rotating rod, a driven gear, a motor and a driving gear are used in cooperation; the problems that traditional on-line teaching all-in-one machine equipment is poor in flexibility and inconvenient to adjust theangle and the height in the using process can be effectively solved, the angle can be automatically adjusted through the device, meanwhile, rising can be conveniently conducted according to using requirements, and the teaching quality is guaranteed.

The invention relates to the technical field of vacuum pump control, in particular to an electric vacuum pump control system and method. The control method comprises the steps that a key ON gear switching signal, a storage battery voltage signal and a vacuum pump pressure signal are acquired; and a vacuum pump is controlled to work in one of a fixed-frequency working mode, a voltage protection mode, a normal working mode and a current protection mode according to the key ON gear switching signal, the storage battery voltage signal and the vacuum pump pressure signal. The four working modes including the fixed-frequency working mode, the normal working mode, the current protection working mode and the voltage protection working mode are set, so that the working mode of the vacuum pump is selected according to the key ON gear switching signal, the storage battery voltage signal and the vacuum pump pressure signal. Basic brake boost pressure of the vacuum pump can be guaranteed and maintained, and meanwhile, the use energy consumption of the electric vacuum pump is reduced, and overvoltage protection is achieved.

The invention provides a control method for an engine cooling system. The control method for the engine cooling system includes the following steps that the temperature distribution of all test pointswhen an engine is in the best state under different work conditions is calibrated and made into a MAP chart to be stored in an engine management system; the relationship of the inlet temperature andoutlet temperature of engine cooling liquid and the temperature of all the test points of the engine under a certain work condition is calibrated and made into a MAP chart to be stored in the engine management system; the relationship of the power of an electric fan, the opening degree of a thermostat, and the inlet temperature and outlet temperature of engine cooling liquid under the same work condition is calibrated and made into a MAP chart to be stored in the engine management system; the engine management system builds intelligent cooling control strategies under different work conditionsaccording to the stored MAP charts; and the engine management system controls the inlet temperature and outlet temperature of the engine cooling liquid, the power of the electronic fan and the opening degree of the thermostat according to the intelligent cooling control strategies. The control method for the engine cooling system can lower the temperature distribution and water temperature fluctuation of all the test points of the engine.