38results about How to "Flexible and convenient switching" patented technology

The invention discloses a method for implementing an automatically switched chaotic system by using an analogue circuit, which comprises: forming an automatic switching system by combining two chaotic systems; and using the analogue circuit to implement the automatically switched chaotic system. In the invention, the automatic switching between the two chaotic systems is realized by the analogue circuit, so the existence of the switching of the chaotic systems is proved effectively; when the switching system is used for chaotic synchronization-based secure communication, the security of the chaotic synchronization-based secure communication is enhanced; when the switching system is used for keying technology-based chaotic communication, the inter-system switching is more flexible and convenient; therefore, the automatically switched chaotic system has a promising application prospect.

The invention provides a touch screen mobile terminal fast application switch method and belongs to the field of electronic information technology. According to the touch screen mobile terminal fast application switch method, a gesture preset progress, a gesture monitoring progress and an application switch progress are added in a mobile terminal system, a user can preset quick switch gesture motions among multiple applications through the gesture preset progress, the monitoring progress operates in a background and is used for monitoring preset gesture motions, when the corresponding gesture motions reach, the application switch progress is triggered, and therefore the user can be supplied with an application switch function. By adding corresponding system progresses, switch among the multiple applications is greatly quickened, and satisfaction degrees of the user of the mobile terminal are improved.

The invention discloses an electric transmission system of a dual-power metro grinding car. The electric transmission system comprises a high-voltage electric appliance box, an electric reactor, a traction inverter, a traction motor, an auxiliary power generator, a three-phase rectifier cabinet, a grinding inverter and a grinding device, wherein power can be supplied to the traction motor and the grinding inverter through a contact grid, or power can be supplied to the traction motor and the grinding device through the auxiliary power generator. The invention further provides a power switching method for the dual-power metro grinding car. According to the method, seamless switching of the power supply between the contact grid and the auxiliary power generator can be realized. The electric transmission system has the advantages of being convenient to maintain, lower in energy consumption and pollution, and friendly to the environment; the power switching method has the advantages that the dual-power metro grinding car needs not to be shut down in the switching process, the flexibility and the convenience are guaranteed, the voltage is kept stable during the switching of the power supply, and the normal operation of the dual-power metro grinding car is not impacted.

The present invention discloses an atomic force microscope-based multifunctional combined probe system. The system can switch the probes having different functions in various set working environments by the program control and in an in situ switching manner, thereby in situ realizing the functions, such as the microscopic friction and wear experiments, the surface topography scanning, the crystal structure evolution and detection, the friction energy dissipation measurement, etc., in a same experiment area. When the system switches the probes in the in situ switching manner, the working environment does not need to be destroyed, thereby avoiding the pollution of the external environment to the sample surfaces effectively.

The invention discloses a nitrogen and phosphorus removal integrated biological reaction tank operating in multiple modes. The biological reaction tank comprises a biological selection zone, a pre-anoxic zone, a main reaction zone, a water distribution zone, a water outlet zone and an internal reflux channel, wherein the main reaction zone comprises a zone A, a zone B and a zone C; the zone A can serve as an anaerobic zone or an anoxic zone during operation; the zone B and the zone C can serve as aerobic zones and can also serve as anaerobic zones or anoxic zones during operation; the biological selection zone is arranged on the forepart of the reaction tank; the pre-anoxic zone is arranged behind the biological selection zone; the water distribution zone is arranged among the zone A, the zone B and the zone C; and the water outlet zone is arranged between the zone B and the zone C and is connected with the water distribution zone by the internal reflux channel. The nitrogen and phosphorus removal integrated biological reaction tank operating in multiple modes, which is provided by the invention, has the advantages that the biological reaction tank has the characteristics of intensification, small floor area and small quantity of equipment and can alternately operate in multiple modes; and the modes are switched freely and flexibly, so that impact load resistance is ensured and efficient biological nitrogen and phosphorus removal can be achieved under the condition that the inflow water quality changes more substantially.

The utility model relates to a machine for riveting a heating series movable connection pipe seat and inlet and outlet pipes; an upper support and a lower support are fixedly arranged up and down; two side installation seats and a lower bracket are respectively arranged on the front side of the lower support fixedly; a riveting device is fixedly arranged on the upper plane of the lower support in the upper support; a side push cylinder is fixedly arranged at the rear part of the upper support which corresponds to the riveter; two upper compression cylinders which are arranged in parallel are fixedly arranged at the middle part of the upper plane of the upper support; a pipe clamping seat is respectively hinged on plunger heads of the two upper compression cylinders which are arranged in the upper support; the pipe clamping seats are respectively used for pressing and fixing an air inlet pipe and an air outlet pipe of a heater; and the pipe clamping seats are arranged corresponding to the riveter. According to the riveting machine, the operation process of an operator can be greatly simplified, the difficult riveting problem between any pipeline and pipe seat with small spacing as well as the pipe seat and the pipe of any pipe seat heating product with or without incision is solved, one machine can solve the difficult riveting problem between the movable connection pipe seat and the pipe of any heater, the status quo that production cannot be carried out because the trend of the pipeline and the position of the pipe seat are different is avoided, the production efficiency and the quality are improved, and conditions are conveniently provided for customizing standardized production in future.

A water treatment device of continuous flow ozone / ultraviolet / advanced oxidation relates to a water treatment device which solves the problems that the existing water treatment device has low ozone utilization rate and can not realize arbitrary combination, flexible switch and the like among ozone oxidation, ultraviolet disinfection and advanced oxidation. An ozone outlet of an ozone generator iscommunicated with an ozone inlet at the upper end of a dissolved ozone column; a water outlet pipe at a side wall of the bottom of the dissolved ozone column is communicated with an inlet end of a peristaltic pump; an outlet end of the peristaltic pump is communicated with an ozone inlet of a mixer; raw water flows into the mixer from a mixer raw water inlet of the mixer; hydrogen peroxide stock liquid is injected into the mixer from a hydrogen peroxide inlet on the mixer by the peristaltic pump; and the outlet of the mixer is communicated with the side wall of a reactor shell positioned belowa microporous water distribution plate. The water treatment device can be used for the disinfection of drinking water, micro pollutant water and source water and water treatment technology of eliminating organic pollution.

The invention relates to a construction steel platform mould base system with a double tuned mass vibration reduction function. A fixing connection mode of a traditional whole climbing steel platform mould base system and a structure main body is transformed into a mode that the bottom connected to a friction support base can slide, tuning vibration reduction control is conducted by using the steel platform mould base system, and meanwhile the vibration of the structure main body and the mould base system generated by earthquakes or wind load is reduced. A friction swing support base is also arranged on a material stacking area platform, the mode of tuned mass vibration reduction is adopted to further reduce the vibration of the structure main body and the mould base system, accordingly, the whole platform system becomes a double tuned mass damper, and double tuned mass vibration reduction is achieved. The parameters such as support base rigidity and material stacking area platform quality mass are changed, so that the system is adapted to the structure frequency in different construction processes, and accordingly the better vibration reduction effect is achieved. The tuned mass vibration reduction function and the normal usage function of the steel platform mould base system can be switched at any time, and the system is flexible to use. The construction steel platform mould base system belongs to the technical field of wind resistance, shock resistance and shock absorption of civil engineering.

The invention relates to the field of communication and provides a terminal and a service processing method, wherein the terminal comprises an McWill module, a GSM module and an application process; the application processor, connected with the McWill module and the GSM module respectively, is used for sending service control messages to the McWill module and the GSM module respectively; the McWill module is used for receiving the service control messages, performing signaling exchange with a network side according to the service control messages and then initializing service; and the GSM module is used for receiving the service control messages, performing the signaling exchange with the network side according to the service control messages and then initializing service. The terminal and the service processing method have the advantages of being convenient and flexible to network switch, having powerful functions and meeting various requirements of people.

The invention discloses a sewage low-carbon biological treatment system and method self-adaptive to water quality change. The sewage low-carbon biological treatment system comprises a sludge concentration fermentation tank, a rectangular water inlet box culvert, a multifunctional tank, a biological reaction tank, an external reflux sludge channel, a secondary sedimentation tank and an effluent quality online monitoring system, the two sides of the rectangular water inlet box culvert are each connected with one multifunctional pool, and the two sets of multifunctional pools are rectangular. A sludge concentration fermentation tank is arranged on one side of the multifunctional tank, the other side of the multifunctional tank is connected with the biological reaction tank, an overrunning box culvert is arranged between the multifunctional tank and the biological reaction tank, and the water inlet end of the overrunning box culvert is connected with a water outlet port of a rectangular water inlet box culvert; the water outlet end of the biological reaction tank is connected with the secondary sedimentation tank; an outer return sludge channel is arranged on one side of the water distribution channel of the secondary sedimentation tank and extends to surround the peripheries of the biological reaction tank, the multifunctional tank and the sludge concentration and fermentation tank. The invention solves the technical problem that the matrix metabolism balance of the biological treatment system is difficult to realize when the water quality is unstable.

The invention discloses an automatic ejection and reset device of a dead brake hook. The automatic ejection and reset device comprises a brake wheel, a gear and dead brake integration hook, a transmission mechanism, a power mechanism and an arc fixed plate, wherein the gear and dead brake integration hook comprises a connecting rod and a gear, a hook head is bent at one end of the connecting rod,the hook head can make contact with the brake wheel and can be clamped into a dovetail groove of the brake wheel, and the other end of the connecting rod is fixedly connected with the gear; the transmission mechanism is fixed on the arc fixed plate; the gear is rotationally connected with a fixed rotating shaft on the arc fixed plate and is in transmission connection with the transmission mechanism; and the power mechanism can drive the gear to rotate through the transmission mechanism, so that the gear and dead brake integration hook can automatically switch between the reset state and the to-be-brake state. The switching process is operated flexibly and conveniently, safety and reliability are realized, and time and labor are saved.

The invention discloses a boiler fuel nozzle which belongs to boiler ancillary facilities and is mainly used for mother pipe boilers in iron and steel enterprises. The boil fuel nozzle comprises a shell; and the shell is provided with two coal powder mixing ports, a secondary air port, and a tertiary air port. The boiler fuel nozzle is characterized in that the shell also comprises six coke oven gas pipes and a plurality of blast furnace gas pipes, wherein the coke oven gas pipes are arranged among the blast furnace gas pipes, and the coke oven gas pipes and the blast furnace gas pipes are all made of 1Cr18Ni9Ti. The boiler fuel nozzle is simple is structure, stable in burning, and energy-efficient and environment-friendly. By using the boiler fuel nozzle, for every year, blast furnace gas can be used by 1,400,000GJ, standard cola can be saved by 48,000t, dust is reduced by 16,000t, and discharged SO2 is reduced by 1,600t. Fuel switching is flexible and convenient, i.e. the switching between gas and coal powder takes about one hour.

The invention relates to a process for manufacturing polyester fiber filament by using a false twisting deformation elastic-adding machine, which is characterized in that raw material strand silk which is from a roller (1) passes through an inlet silk guide (2), then directly passes through a hot box(3) and is heated by the mode of non-contact heating, then moves to a turning silk guide (5), (or passes through a twisting machine 6), then passes through a two-roller (7) and reaches to a network jet nozzle (8) and is manufactured to obtain fully drawn yarn FDY (or shape preserving performances with high requirements such as profile degree, degree of hollowness and the like) polyester fiber filament, The process has the advantages of without altering the device, simple process adjustment andthe like, and the switching of the two product processes is flexible and convenient, and the process efficiently extends the using range of the false twisting deformation elastic-adding machine and has obvious economic benefits.

The invention relates to a formula type multifunctional liquid milk production method which comprises the following steps: S1, degreasing raw milk to obtain skimmed milk and fat standard liquid; s2, dialyzing the skimmed milk to obtain a protein standard solution and a first dialysate; and S3, performing dialysis treatment on the first dialysate to obtain a lactose standard solution and a second dialysate. S4, performing reverse osmosis purification treatment on the second dialysate to obtain total solid standard liquid and recycled water; wherein the total solid standard liquid is an aqueous solution containing mineral substances. And S5, mixing the fat standard liquid, the protein standard liquid, the lactose standard liquid, the total solid standard liquid and the recycled water according to the formula proportion to obtain the required formula milk. According to the invention, various formula milk with different functions can be blended on one production line, the switching is flexible and convenient, in addition, the equipment redundancy can be effectively saved, the simplification of the equipment and the control of the production cost are facilitated, the occupied space is smaller, and the centralized management is facilitated.

The invention discloses a sewage treatment device with multi-mode operation, and belongs to the field of sewage treatment systems. Four groups of fixed tank bodies are arranged in parallel, and a fixed flow guide wall, a movable flow guide device, an aeration device and the like are respectively arranged at two ends of each group of fixed tank bodies. The volume distribution of different reaction tanks can be realized by the movable flow guide device, so that the optimal nitrogen and phosphorus removal treatment effect is achieved. Aeration devices are distributed on the whole tank body, and whether aeration of each area is started or not is controlled through valves on the aeration devices, so that the aerobic / anoxic / anaerobic state is realized. A step-feed multi-stage A / O operation mode is adopted, so that biological denitrification is enhanced, a carbon source in sewage is utilized to the greatest extent, internal reflux is not needed, and energy consumption is reduced. The system sludge concentration is higher than that of a traditional biochemical pool. Multiple modes can be alternately operated according to the water quality condition, and the number of the alternate operation modes can be as high as 7; the operation modes are diversified, switching is flexible and convenient, and the system can adapt to great changes of inflow water quality and meet the requirements of outflow water quality.

A water treatment device of continuous flow ozone / ultraviolet / advanced oxidation relates to a water treatment device which solves the problems that the existing water treatment device has low ozone utilization rate and can not realize arbitrary combination, flexible switch and the like among ozone oxidation, ultraviolet disinfection and advanced oxidation. An ozone outlet of an ozone generator iscommunicated with an ozone inlet at the upper end of a dissolved ozone column; a water outlet pipe at a side wall of the bottom of the dissolved ozone column is communicated with an inlet end of a peristaltic pump; an outlet end of the peristaltic pump is communicated with an ozone inlet of a mixer; raw water flows into the mixer from a mixer raw water inlet of the mixer; hydrogen peroxide stock liquid is injected into the mixer from a hydrogen peroxide inlet on the mixer by the peristaltic pump; and the outlet of the mixer is communicated with the side wall of a reactor shell positioned below a microporous water distribution plate. The water treatment device can be used for the disinfection of drinking water, micro pollutant water and source water and water treatment technology of eliminating organic pollution.

The invention provides a UUV(Unmanned Underwater Vehicle) navigational speed duplex control device and method for ocean observation operation, which comprises a task control module, a magnitude navigational speed control channel, a precise navigational speed control channel, a motion control module and a sensing module, wherein the task control module is mutually connected with the magnitude navigational speed control channel, the precise navigational speed control channel, the motion control module and the sensing module, and the magnitude navigational speed control channel and the precise navigational speed control channel are all connected with the motion control module. The sensing module captures UUV status, position information and ocean current section information, and then sends the UUV status, the position information and the ocean current section information to the task control module, the motion control module and the task control module to carryout real-time information exchange after the information is processed. The task control module selects different channels according to the current operating condition, and sends digital control quantity corresponding to the current navigational speed command of UUV to the motion control module in order to accomplish the entire navigation speed control procedure. The UUV (Unmanned Underwater Vehicle) navigational speed duplexcontrol device and method disclosed by the invention can be applied for cable control debugging and navigational speed control of various kinds of UUV (Unmanned Underwater Vehicle) during multiple-operation condition operation.

The invention relates to the field of vehicle transmission equipment, in particular to a multi-stage hydraulic machine continuously variable transmission for a heavy vehicle. The multi-stage hydraulicmachine continuously variable transmission for the heavy vehicle comprises a mechanical transmission assembly, a hydraulic transmission assembly, a power shaft, a motor shaft and a main output shaft,wherein the power shaft, the motor shaft and the main output shaft are parallel; the mechanical transmission assembly comprises a front planetary row confluence device, a rear planetary row confluence device, a fixed shaft gear pair and a plurality of clutch execution devices used for band switch; the hydraulic transmission assembly comprises a variable-displacement hydraulic pump and a quantitative hydraulic motor which are arranged in series; an input shaft of the variable-displacement hydraulic pump is fixedly connected with a third gear; and an output shaft of the quantitative hydraulic motor is fixedly connected with the end, close to the front planetary row confluence device, of the motor shaft. The multi-stage hydraulic machine continuously variable transmission for the heavy vehicle not only can achieve multi-stage large-range continuously variable speed adjusting performance, but also can meet the multi-mode requirements for driving of the vehicle under different working conditions.

The invention discloses a multi-cycle variable flow refrigerating system and aims at providing a system capable of reducing the initial investment and operating cost. A first exhaust port of a refrigerating compressor unit is connected with a second port of a heat exchanger through a second valve. A third port of the heat exchanger is connected with a first port of a three-way valve. A second portof the three-way valve is connected with one end of a second throttle valve and one end of a third valve correspondingly. The other end of the second throttle valve is connected with a first suctionport through an evaporator. The other end of the third valve is connected with a first port of the heat exchanger and one end of a first valve. The other end of the first valve is connected with a third port of the three-way valve in parallel and then is connected with a second suction port. A fourth port of the heat exchanger is connected with a second exhaust port through a first throttle valveand a condenser. The multi-cycle variable flow refrigerating system is flexible and convenient to switch, the initial investment of the system can be reduced, the system operation cost can be lowered,and the system is more stable in operation.

The invention provides a UUV(Unmanned Underwater Vehicle) navigational speed duplex control device and method for ocean observation operation, which comprises a task control module, a magnitude navigational speed control channel, a precise navigational speed control channel, a motion control module and a sensing module, wherein the task control module is mutually connected with the magnitude navigational speed control channel, the precise navigational speed control channel, the motion control module and the sensing module, and the magnitude navigational speed control channel and the precise navigational speed control channel are all connected with the motion control module. The sensing module captures UUV status, position information and ocean current section information, and then sends the UUV status, the position information and the ocean current section information to the task control module, the motion control module and the task control module to carryout real-time information exchange after the information is processed. The task control module selects different channels according to the current operating condition, and sends digital control quantity corresponding to the current navigational speed command of UUV to the motion control module in order to accomplish the entire navigation speed control procedure. The UUV (Unmanned Underwater Vehicle) navigational speed duplexcontrol device and method disclosed by the invention can be applied for cable control debugging and navigational speed control of various kinds of UUV (Unmanned Underwater Vehicle) during multiple-operation condition operation.

The invention discloses an automobile sealing strip cutting and winding process which specifically comprises the following steps that firstly, when cutting and winding integrated equipment is used for cutting an automobile sealing strip, a cutting assembly is arranged on a winding assembly in a sleeving mode, and the automobile sealing strip is pushed to the top of the cutting assembly. According to the tailoring and winding process for the automobile sealing strip, the winding assembly is arranged on the rack, the oval winding pipe with the notch is matched with the air bag to achieve the effect of clamping and winding the automobile sealing strip, the tailoring assembly is externally arranged on the winding assembly, and the tailoring assembly and the winding assembly are matched to achieve the effect of equal-length tailoring of the automobile sealing strip; and the oval contour of the oval winding pipe and the air bag capable of spraying air outwards play key roles, so that the winding assembly is dual-purpose, independent cutting equipment does not need to be arranged independently, the whole equipment has two functions while the size is not changed, and the machining and packaging requirements of different products can be met.

The invention discloses a universal focusing ring suitable for different lenses. The universal focusing ring comprises a focusing ring body, wherein the bottom of the focusing ring body is slidably connected with a focusing module, the focusing module comprises a plurality of circles of focusing modules of which the diameters are sequentially increased, and each focusing module comprises a plurality of movable rods in an annular array. The invention further discloses an implementation method of the universal focusing ring suitable for different lenses. The universal focusing ring is advantagedin that a focusing structure is refined, a plurality of circles of annularly arrayed movable rods form an integral focusing petal, so the focusing structure can adapt to different shapes and quantities of lens petals, and universality of focusing of different lenses is realized, and the universal focusing ring can reduce jig cost, is universal for focusing of different lenses, is flexible and convenient to switch and use, has low error-tolerant rate, is convenient to maintain, reduces the use difficulty and improves the use efficiency.

The invention discloses a method for treating sewage by using an integrated biological reaction pool operated in multiple modes. The reaction zone includes zone A, zone B and zone C; zone A can be used as an anaerobic zone or anoxic zone during operation, and zones B and C can be used as aerobic zone or anaerobic zone or anoxic zone during operation. The biological selection area is located at the front of the reaction tank, followed by a pre-anoxic area, the water distribution area is located between areas A, B, and C, the outlet area is located between areas B and C, and the inner return channel connects the outlet area and water distribution area. The method for treating sewage with an integrated biological reaction tank using multi-mode operation provided by the present invention has the characteristics of intensification, small footprint, and a small number of equipment, and it can also operate in multiple modes alternately, with free and flexible mode switching, impact load resistance, and In the case of large changes in influent water quality, high-efficiency biological nitrogen and phosphorus removal can be achieved.

The invention discloses a spray gun device for drawing oil painting. The spray gun device comprises a gun body, a paint box, a sprayer, a rotary disk, a rotary shaft, a first bracket, a rotary platform, positioning teeth, a rotary column, a second bracket, a third bracket, a pressing plate and a torsional spring, wherein a conveying passage is arranged in the gun body; a spraying end is arranged at the head of the gun body; the gun body is connected with a control handle, and the control handle compresses the air in the gun body to spray the pigment, conveyed into the conveying passage, of thepaint box out of the spraying end; a plurality of spraying holes are formed in the sprayer; the sprayer is arranged on the rotary disk; the diameters of the spraying holes are different; the rotary disk is coaxially connected with the rotary shaft; the rotary shaft is rotatably arranged on the first bracket; the rotary platform is connected with the rotary shaft; a positioning groove embedded inthe positioning teeth is formed in the rotary platform; the positioning teeth are connected with the rotary column; the rotary column is rotatably arranged on the second bracket; the torsional springis arranged on the rotary column in a sleeving manner; and the pressing plate is arranged on the positioning teeth. The spray gun device can flexibly and conveniently switch the sprayer with differentspraying hole sizes to meet different drawing demands.

The invention discloses a multi-cycle variable-flow heat pump system. The multi-cycle variable-flow heat pump system is simple in structure and low in cost and comprises a refrigeration compressor unit, a three-way valve, a heat exchanger, an indoor unit, an outdoor unit, a first throttling valve, a second throttling valve, a first four-way reversing valve and a second four-way reversing valve. Afirst exhaust port of the refrigeration compressor unit is connected with a fourth port of the first four-way reversing valve through a second valve. A first suction port of the refrigeration compressor unit is connected with a second port of the second four-way reversing valve. A second exhaust port of the refrigeration compressor unit is connected with a second port of the second four-way reversing valve. A second suction port of the refrigeration compressor unit is connected with a fourth port of the second four-way reversing valve. By adoption of the multi-cycle variable-flow heat pump system, eight-cycle comparative experiments can be conducted on one experiment table, operation is convenient, and the accuracy of experimental results is high.

The invention discloses a fan blade wake flow wind field characteristic measurement system and method, and the system comprises a traction device which is disposed at a position N times the height of a fan and is located in a fan wake flow region; a traction rope, wherein one end of the traction rope is connected with the traction device, and the other end is fixedly connected with the ground; a plurality of wind speed acquisition devices which are arranged on the traction rope along the height direction of the traction rope; and an accelerometer which is mounted on the traction rope. According to the invention, the real-time wind speed of the measuring points at different heights can be measured synchronously, and the measuring positions can be switched conveniently and quickly, so that the wind field distribution of the wake flow area of the fan can be obtained accurately and efficiently.

The invention discloses a variable-flow multi-cycle heat pump system, and aims at providing a system which is simple in structure and low in cost. The variable-flow multi-cycle heat pump system comprises a refrigerating compressor unit, a three-way valve, a heat exchanger, an indoor unit, an outdoor unit, a first throttle valve and a second throttle valve; the refrigerating compressor unit comprises multiple compressors and four-way reversing valves of which the number is the same as that of the compressors, and each compressor and the corresponding four-way reversing valve form a compressingunit; in each compressing unit, the exhaust end of the compressor is connected with a first port of the corresponding four-way reversing valve, and the suction end of the compressor is connected witha third port of the corresponding four-way reversing valve; and in each compressing unit, second ports of the four-way reversing valves are connected in parallel and then divided into second ports andthird ports of the refrigerating compressor unit, and fourth ports of the four-way reversing valves are connected in parallel and then divided into first ports and fourth ports of the refrigerating compressor unit. The system is simple in structure and flexible and convenient to switch.

The invention discloses a multifunctional elevator testing and controlling device, which comprises a first control panel, a second control panel and a selector switch. The first control panel consists of a master control panel, a shaft control panel, an elevator car control panel, a first interface and a second interface, a switching value signal output end of the shaft control panel is electrically connected with a switching value signal input end of the elevator car control panel, a CAN (controller area network) bus interface of the master control panel, a CAN bus interface of the shaft control panel and a CAN bus interface of the elevator car control panel are in communication connection by CAN buses, the first interface is electrically connected with a switching value signal input end of the master control panel, and the second interface, the CAN bus interface of the shaft control panel and the CAN bus interface of the elevator car control panel are in communication connection by CAN buses; the second control panel is provided with at least two motor driving devices; and the selector switch is used for selectively leading one of the motor driving devices to be electrically connected with one of the first interface and the second interface. The different motor driving devices can be switched, and accordingly different testing requirements can be met.