87results about How to "Increase optionality" patented technology

The invention provides a light-conversion photosensitive laminate, a cured film, a circuit board and an electronic device. The light-conversion photosensitive laminated body provided by the invention comprises a supporting layer, a photosensitive layer and an optional protective layer which are sequentially laminated, the light-conversion photosensitive laminated body contains a light conversion agent, the absorption wavelength of the light conversion agent is greater than 390nm, and the emission wavelength of the light conversion agent is less than or equal to 390nm. The light conversion agent is added into the light conversion photosensitive laminated body provided by the invention, and the light conversion agent has an up-conversion function, can trigger an anti-Stokes phenomenon, absorbs long wavelength and low energy, and releases short wavelength and high energy, so that when the light conversion photosensitive laminated body is irradiated by an exposure machine, the light conversion effect is good, and the light conversion effect is good. According to the invention, long-wave-band light emitted by the exposure machine is absorbed and converted into short-wave-band light which can be absorbed by the photoinitiator by the light conversion agent, so that the high utilization rate of the light source is realized under the condition that the conventional photoinitiator is still used, the selectivity of the photoinitiator is expanded, and the photocuring speed and the photocuring effect of the photosensitive layer are improved.

The present invention provides a vehicle-road cooperative control method, device, equipment and readable storage medium, including: when the distance from a bus to a target station is less than a preset distance, if the number of passengers getting off the bus at the target station is zero, obtaining the number of passengers getting on the bus at the target station; determining the theoretical time for the bus to enter and exit the target station according to road condition information; determining the theoretical number of passengers getting on the bus according to the theoretical time; detecting whether the number of passengers getting on the bus at the target station is less than the theoretical number of passengers; if the number of passengers getting on the bus at the target station is less than the theoretical number of passengers, outputting a prompt that the bus does not stop at the target station; if the number of passengers getting on the bus at the target station is not less than the theoretical number of passengers, outputting a prompt that the bus stops at the target station. Through the present invention, the selectivity of passengers is increased, thereby improving the transportation efficiency of bus lines.

The invention provides olivine type lithium-containing silicon-based compact ceramic and a preparation method thereof. The chemical general formula of the lithium-containing silicon-based compact ceramic is LiIn1-xMxSiO4 (x is greater than or equal to 0.35 and less than or equal to 0.8), M must contain a Yb element and also comprises at least one element of Zn, Ni, Ga, Y, Eu, Ho, Er and Tm, and the sum of lower corner marks of the elements in M is equal to the value of x. According to the method, a traditional solid-phase reaction sintering method is adopted, the process is simple, and the olivine type lithium-containing silicon-based compact ceramic with excellent comprehensive microwave dielectric properties can be obtained under the condition of not additionally adding a sintering aid or carrying out hot pressing sintering.

The utility model discloses an LED luminous fishing float, and belongs to the technical field of fishing gear supplies. An LED light-emitting float comprises a circuit board body and a control module, a connecting module is fixedly arranged on the circuit board body, the connecting module is electrically connected with the control module, and the LED light-emitting float further comprises a plurality of sets of LED lamps welded to the two faces of the circuit board body respectively. The circuit board body is fixedly arranged in the light guide strip; according to the luminous float, the plurality of groups of LED lamps are fixed on the transparent flexible printed circuit board, and then are packaged by the light guide strip made of transparent silica gel, so that on one hand, the luminous float can be repeatedly used, the utilization rate of the luminous float is improved, on the other hand, the luminous float is small in light source loss, uniform in brightness and light in weight, and the effects of miniaturization, lightness and thinness are realized; and the problems of light loss and non-uniform darkness caused by arrangement of light sources in a traditional light guide mode are also avoided, and the use experience is improved.

The invention discloses a time sequence electroencephalogram data quality detection and restoration method and a time sequence electroencephalogram data quality detection and restoration system, and belongs to the technical field of industrial internet. According to the method, the problems that the electroencephalogram data is lost, the electroencephalogram data quality is poor and the electroencephalogram data storage efficiency is low are solved. According to the method, by calculating the integrity index of the electroencephalogram data, the hidden data value missing condition can be detected, then the data filling operation is guided according to the missing detection result, and the original electroencephalogram data characteristics can be recovered. Effectiveness indexes are established on the basis of effectiveness, change speed and acceleration of values, quantitative evaluation standards can be provided for reasonability of electroencephalogram data values so as to detect whether data points are reasonable and have sudden changes or abnormities or not, a data restoration method is further selected according to detection results, data stability is enhanced, data continuity is improved, and the accuracy of data restoration is improved. The electroencephalogram data quality is improved, and subsequent data analysis is facilitated. The method can be applied to electroencephalogram data quality detection and restoration.

The utility model discloses a modular composite landscape paving system, relates to the field of outdoor landscape systems, and aims to solve the problems of poor selectivity and flexibility of existing permeable paving materials and non-permeable paving materials, and adopts the combination of a high-bearing-capacity non-permeable frame and a low-bearing-capacity permeable module for use. The non-permeable frame serves as a main bearing structure, the permeable module serves as a permeable structure, the requirement for water permeability and the requirement for bearing capacity can be met, and the selectivity and flexibility of construction are improved.

The utility model provides a ternary precursor material production mother liquor treatment device which comprises an alkali liquor reaction tank, a deamination unit, a flow control unit, a pH (Potential of Hydrogen) adjusting tank, a spiral-wound membrane concentration inlet liquor storage tank and a spiral-wound membrane concentration unit, the flow control unit comprises a first-stage flow control unit and a second-stage flow control unit, and has the beneficial effects that firstly, ammonia nitrogen substances in liquid to be treated are separated out in the form of ammonia gas under the action of second-stage vacuum flash evaporation, and only relatively pure sodium sulfate is left in mother liquor; then carrying out concentration operation through a combined spiral-wound membrane element, further increasing the concentration of sodium sulfate in the mother liquor material to 20% or above, and carrying out heat removal evaporation operation on the concentrated material; the vaporization water quantity of the evaporation system is reduced, and the energy consumption of the treatment device for the ternary precursor material production mother liquor can be reduced.

The application provides a postcard generation method and device, a vehicle and a storage medium, relates to the technical field of intelligent vehicles, and can generate a postcard related to a vehicle-mounted voice assistant according to the demand of a user, so as to improve the driving experience of the user. The method comprises the following steps: obtaining voice information of a vehicle user, and identifying a trigger word in the voice information; associatively expanding the identified trigger word to generate description information of a postcard; generating a picture of the postcard and text information matched with the picture according to the description information; generating the postcard according to the picture and the text information; and displaying the postcard on a vehicle-machine interface.

The invention discloses a distributed power generation system based on methanol fuel cells. The distributed power generation system comprises a plurality of distributed power generation subsystems; each distributed power generation subsystem comprises a methanol fuel cell module, a working parameter control module, a waste heat recovery management module, a cell cooling module and an energy storage management module; the methanol fuel cell module is electrically connected with the working parameter control module and the energy storage management module, and the methanol fuel cell module is further connected with the waste heat recovery management module and the cell cooling module through pipelines. The methanol fuel cell module is subjected to waste heat recovery and cooling temperature control through the waste heat recovery management module and the cell cooling module, so that the temperature control reliability and the cell operation stability are improved.

The present invention discloses a portable lymphedema drainage device, and relates to the technical field of lymphedema drainage. The portable lymphedema drainage device comprises a storage device, a sleeve device arranged in the storage device, a pressure device placed in the storage device, and a massager placed on one side of the pressure device. The sleeve device comprises two groups of pressure sleeves, one group of pressure sleeves is an upper limb pressure sleeve, and the other group of pressure sleeves is a lower limb pressure sleeve; both sides of the pressure pump device are respectively provided with hanging parts for connecting with the pressure sleeves. The device can select different massage modes according to the drainage site and environment, improve the selectivity, monitor the massage pressure in real time, adjust the massage pressure according to the needs of the user, improve the correctness and effect of lymphatic drainage, and facilitate medical staff to monitor the use of the equipment in real time, and is easy to store and carry, and convenient for mobile use.

The invention discloses a low-temperature cavity rapid sample changing device, and relates to the technical field of low-temperature detection equipment, the low-temperature cavity rapid sample changing device comprises a detection cavity, a valve, a sample support and a locking mechanism, the detection cavity is provided with a sample transfer channel, a heat conduction seat is arranged in the detection cavity, the heat conduction seat is provided with a sliding groove, the valve is used for opening or closing the sample transfer channel, and the sample support is provided with a sliding block; the locking mechanism comprises two locking blocks, the two locking blocks can move oppositely in the sliding direction of the sliding blocks and get close to each other or get away from each other, and when the sliding blocks and the sliding grooves are in a sliding fit state, the locking blocks can move oppositely in the sliding direction of the sliding blocks. The two locking blocks get close to each other or get away from each other and are embedded between the sample support and the heat conducting seat to limit the sliding of the sliding block so as to realize locking, and the two locking blocks get away from each other or get close to each other so as to be separated from the sample support and the heat conducting seat so as to unlock the sliding block. The rapid sample changing device for the low-temperature cavity can greatly shorten the sample changing time and improve the sample changing efficiency.

The invention belongs to the technical field of rare earth and semiconductor raw materials, and discloses a method for purifying metal scandium through vacuum magnetic suspension clean smelting. The purification method comprises the following steps that a scandium metal material subjected to calcium thermal reduction is put into a vacuum magnetic suspension smelting furnace, vacuumizing is conducted firstly, then inert protective gas is introduced, electric heating smelting is conducted, after all the materials form a liquid state, refining purification is conducted through electromagnetic stirring and heat preservation, and after purification is completed, cooling is conducted to obtain a scandium metal ingot; and the obtained metal scandium ingot is repeatedly put into the vacuum magnetic suspension smelting furnace to be repeatedly smelted, refined and purified, and purified metal scandium is obtained after cooling. The purification method provides a new thought for preparation and purification of metal scandium, repeated distillation is not needed, and energy consumption is reduced. Carbon, oxygen, nitrogen, hydrogen, calcium, manganese, iron and the like can be removed, high-purity metal scandium can be prepared, and the purification method is high in treatment scale selectivity.

The application relates to a vehicle wheel speed signal processing device, method, system and vehicle, comprising a vehicle wheel speed signal processing device, which comprises a wheel speed sensor, a collection decomposition module and a control module; the wheel speed sensor is used for outputting a wheel speed signal; the collection decomposition module is used for collecting the wheel speed signal output by the wheel speed sensor and decomposing the wheel speed signal to obtain a decomposition processing signal; and the control module is used for analyzing the decomposition processing signal to obtain an analysis result and controlling the vehicle based on the analysis result. According to the technical scheme of the application, the collection decomposition module is built by replacing an integrated chip with discrete devices, the diagnosis, collection and processing of the wheel speed signal are realized, the use cost is reduced, and the selectivity is improved.

The grinding equipment comprises an equipment body, a limiting groove is formed in the position, close to the front face, of the inner side of the equipment body, the length of the inner side of the limiting groove is matched with the length of the side face of a lead screw, and the top of the inner side of the equipment body is movably connected with a bottom frame; a grinding wheel is movably clamped to the top of the bottom frame, a threaded rod is in bearing connection with the inner side of the limiting groove and is in bearing connection with the equipment body, a lead screw is in threaded connection with the outer surface of the threaded rod, a first bevel gear is fixedly connected to the bottom of the bottom frame, and a second bevel gear is meshed with the bottom of the first bevel gear. And the second bevel gear is in bearing connection with the inner side of the equipment main body. According to the polishing device, the clamping block and the limiting block are arranged, so that the whole polishing device is convenient to use, meanwhile, when the polishing device is used, the clamping block cannot be loosened when rotating polishing is carried out, use is convenient, and the overall stability is good.

The present application relates to a hardware-in-the-loop test method, device, computer equipment, medium and program product, which are applied to the field of automobile technology. The method includes: when a selection operation for hardware-in-the-loop test software is detected, a DBC file imported into the selected hardware-in-the-loop test software and test configuration data matching the selected hardware-in-the-loop test software are obtained; the DBC file includes multiple communication messages; based on the comparison results between the communication nodes in the multiple communication messages and the vehicle nodes to be tested, a target message matching the vehicle nodes to be tested is determined from the multiple communication messages, and the target message is configured based on the DBC configuration file and the system variable file matching the test configuration data to obtain test data; when the selected hardware-in-the-loop test software is run, the vehicle nodes to be tested are tested based on the test data. The use of this method can improve the test accuracy and test efficiency for the vehicle nodes to be tested.

The present invention belongs to the technical field of pharmaceutical preparations, and specifically relates to a nifedipine sustained-release tablet and a preparation method thereof. The nifedipine sustained-release tablet of the present invention contains 20g of nifedipine, 2-6g of tributyl acetyl citrate, 18-24g of povidone, 17-25g of microcrystalline cellulose, 10-16g of hypromellose, 3-7g of polyvinyl alcohol, and 1g of magnesium stearate per 1000 tablets. Among them, nifedipine exists in the form of a solid dispersion. The present invention provides a sustained-release tablet suitable for industrial production, which has stable drug release during placement and is bioequivalent to the original formulation, and a preparation method thereof.

The present application discloses a formation switching method, device, electronic device and storage medium for object grouping, the method comprising: receiving an object exchange instruction on a pattern matrix displayed in a game scene; exchanging the positions of a first pattern object and a second pattern object in the pattern matrix according to the object exchange instruction, and eliminating the pattern object when a predetermined number of pattern objects of the same type are connected after detecting that the positions of the first pattern object and the second pattern object are exchanged; adjusting the formation of the object grouping in the game scene according to the type of the eliminated pattern object, the object grouping comprising a plurality of virtual objects. By adjusting the formation of the object grouping in the game scene according to the type of the eliminated pattern object, the formation switching of the object grouping can be completed without touching the screen to select the plurality of virtual objects separately, thereby avoiding the need to click on a plurality of virtual objects during the formation switching process, which hinders the player's observation of the plurality of virtual objects.

The utility model discloses an indoor circulating heating device, which belongs to green, digital and intelligent equipment in the technical field of indoor heating, and comprises a shell, a plurality of groups of circulating pipelines are arranged in the shell, each circulating pipeline comprises a plurality of vertical pipes and transverse pipes fixedly connected to two ends of the vertical pipes, and the transverse pipes are arranged in the shell. The two circulating pipelines are fixed through flange screws, flanges are fixed to one ends of transverse pipes, one end of one transverse pipe extends out of the shell, a first electromagnetic valve is fixed to the end, extending out of the shell, of one transverse pipe, and the end, away from the transverse pipes, of the first electromagnetic valve is externally connected with hot water equipment. All the circulating pipelines are connected with a backflow pipeline; one end of the backflow pipeline extends out of the shell and is externally connected with hot water equipment; according to the energy-saving heating equipment, an external heat source such as a gas wall-hanging stove is utilized for forced heat dissipation and heating, the household heating problem in transition seasons and cold current weather in northwest regions is thoroughly solved, meanwhile, water circulation is achieved, and resource waste is avoided.

The utility model discloses an air duct assembly and an air conditioner indoor unit. The air duct assembly comprises a shell, a centrifugal fan and a heat exchanger. The shell is provided with two air outlets formed in the height direction in a spaced mode. The centrifugal fan is arranged at the end of the air duct assembly in the length direction and comprises an outer volute, an inner volute and centrifugal fan blades. The inner volute is rotatably arranged in the inner cavity of the outer volute so that airflow exhausted by the centrifugal fan blades can flow to one of the two air outlets to change the air outlet position. The heat exchanger is located on the axial side of the centrifugal fan, and the length direction of the heat exchanger is parallel to the axis of the centrifugal fan. The motor used for driving the centrifugal fan can be placed on the axial side portion of the centrifugal fan, the compactness of the structure is further improved, the centrifugal fan can have the larger size under the condition that the overall size of the air duct assembly is small, the static pressure resistance of the centrifugal fan is high, the air outlet effect is improved, and the service life of the air duct assembly is prolonged. And the space occupation of the air conditioner indoor unit can be reduced.

The present invention relates to a polyvinylidene fluoride hollow fiber membrane with an easy-to-clean pore structure, which includes an outer membrane structure and an inner membrane structure, both of which are prepared by a thermo-induced phase spinning process, and are synchronously extruded by two twin-screw extruders and respectively formed by two layers of dies, wherein the pore structures of the outer membrane structure and the inner membrane structure have different pore diameters, and the pore diameter of the pore structure of the inner membrane structure is larger than that of the pore structure of the outer membrane structure. The present invention also provides a method for preparing a polyvinylidene fluoride hollow fiber membrane with an easy-to-clean pore structure. The present invention uses the same thermo-induced phase membrane making process to ensure the effective combination of the inner membrane raw material and the outer membrane raw material from the source, avoid the membrane stratification problem, and the pore diameter is adjustable; and the present invention changes the structural morphology of the hollow fiber membrane with a single pore structure in the past, and effectively avoids the problem of the membrane product being difficult to clean after being blocked during operation by forming two layers of pore structures with uniform size and filter pore diameters that increase from small to large from the outside to the inside.

The utility model discloses a medicinal material centrifugal extraction device which comprises a centrifugal extraction tank, a rotary containing barrel is arranged in the centrifugal extraction tank, a steam outlet is formed in the top of the centrifugal extraction tank, a backflow opening is formed in the side portion of the centrifugal extraction tank, and a liquid outlet is formed in the bottom of the centrifugal extraction tank; the circulating extraction tank is provided with a feed port and a discharge port, the steam outlet is connected with the feed port through a concentration assembly, the discharge port is connected with the reflux port through a pipeline, and the discharge port is provided with a first valve; the concentration assembly is used for concentrating and cooling the steam conveyed by the centrifugal extraction tank and conveying the steam to the circulating extraction tank; the extracting solution storage tank is communicated with the liquid outlet through a circulating pump, and the liquid outlet is provided with a second valve; the traditional Chinese medicine centrifugal extraction device can solve the problems that a traditional traditional Chinese medicine centrifugal extraction device cannot extract effective components in traditional Chinese medicine to the maximum extent, and raw materials are wasted.

The utility model belongs to the field of wind power generation technology, concretely relates to a kind of air cooling power module for reconstruction, including power unit frame, laminated busbar, IGBT module assembly, IGBT radiator, support capacitor array, IGBT drive board and alternating copper bar;IGBT radiator is fixed in power unit frame, and independent heat dissipation air cavity is formed by being respectively equipped with air inlet, air outlet air duct plate in upper and lower ends, IGBT module assembly is arranged in radiator base surface, and support capacitor array is fixed in heat inlet air cavity immediately adjacent to radiator air inlet entrance.This utility model can be compatible with installation net side, machine side different model IGBT device by optimizing structure layout, realize module generalization, reduce spare parts type and operation and maintenance cost;Support capacitor array is arranged at radiator air inlet, and the efficient heat dissipation of IGBT module and capacitor is realized simultaneously, reduce component temperature, prolong service life, simultaneously optimize laminated busbar and circuit layout, reduce stray inductance and electromagnetic interference, improve module operating stability and power density.

The utility model provides a stainless steel carrier rocket storage tank structure which comprises a storage tank shell and an end socket, the storage tank shell and the end socket form a sealed cavity, and the sealed cavity is used for storing propellants; the storage box shell comprises a storage box outer-layer shell and a storage box inner-layer shell, the storage box outer-layer shell is arranged on the storage box inner-layer shell in a sleeving mode, and a channel used for storing a low-temperature medium is formed between the storage box outer-layer shell and the storage box inner-layer shell so as to cool the storage box shell. According to the storage tank structure, the storage tank shell can be in a constant-low-temperature environment, and the mechanical property of the welding seam of the storage tank is improved.

The invention provides a photosensitive composition, a photosensitive laminate and a circuit board. The photosensitive composition comprises the following components in parts by mass: 100 parts of alkali-soluble resin, 5-50 parts of a photopolymerization monomer, 0.1-10 parts of a photoinitiator and 0.01-30 parts of a light conversion agent, the absorption wavelength of the light conversion agent is greater than 390nm, and the emission wavelength of the light conversion agent is less than or equal to 390nm. The photosensitive composition provided by the invention is added with the light conversion agent, and the light conversion agent has an up-conversion function, can initiate an anti-Stokes phenomenon, absorbs long wavelength and low energy, and releases short wavelength and high energy, so that light with a relatively long wave band emitted by an exposure machine is converted into light with a relatively strong short wave band absorbed by the photoinitiator, and the exposure efficiency is improved. The high utilization rate of the light source is realized under the condition that the conventional photoinitiator is still used, so that the selectivity of the photoinitiator is expanded, and the photocuring speed and the photocuring effect are improved.

The invention relates to the technical field of microorganisms, in particular to a probiotic composition and application thereof. Three strains of probiotics capable of effectively resisting oxidation and delaying senescence are separated from breast milk, the probiotics belong to natural products, are high in safety and free of toxic and side effects, and after the probiotics are compounded into the probiotic composition, the antioxidant enzyme activity can be improved, malondialdehyde accumulation can be reduced, the oxidation resistance of the body can be improved, and the anti-aging effect of the body can be improved. And the life can be prolonged by reducing the accumulation of lipofuscin, and the probiotic composition disclosed by the invention widens the selectivity of antioxidant and anti-aging probiotic products, and has a wide application prospect.

The invention relates to the field of vehicle bodies, in particular to a vehicle roof assembly and a vehicle with the vehicle roof assembly.The vehicle roof assembly comprises a vehicle body top cover, and a top decoration strip structure or a luggage rack structure is arranged on the vehicle body top cover; the car body top cover comprises a top cover body, and a supporting flange is arranged on the edge of the top cover body. The upper end face of the supporting flange and the upper end face of the top cover body are distributed in a staggered mode. The top decoration strip structure or the luggage rack structure is connected to the supporting turned-over edge and abuts against the side face of the top cover body. According to the roof assembly disclosed by the invention, a traditional roof assembly structure is changed, and the arrangement and placement of the luggage rack structure or the top decoration strip structure on the roof are facilitated through the arrangement of the supporting turned-over edges; meanwhile, the luggage rack structure or the top decoration strip structure is installed at the same position, and it is convenient to select whether the top decoration strip structure or the luggage rack structure is assembled on the vehicle body top cover according to production requirements subsequently; and the selectivity of the roof assembly is improved.

The invention discloses an industrial algorithm construction and environment configuration method and system based on interactive programming, and the method comprises the steps: S1, creating an algorithm operation environment container, and configuring a corresponding operation environment according to a selected dependency file; s2, environment instance gateway registration is executed to the corresponding gateway based on the operation environment; s3, establishing connection between the registration gateway and the interactive programming tool, loading environment configuration corresponding to the operation environment, and initializing a dependency item; and S4, calling a business variable assignment according to an algorithm demand based on the environment configuration and the dependency item to execute industrial algorithm construction. The method has the advantages that the one-to-many relation between the algorithm and the environment is achieved, the service variable assignment is adjusted in a self-adaptive mode through the algorithm requirement, the algorithm development difficulty is lowered, meanwhile, the method is suitable for the configuration requirement of a user, and the applicability of the system is improved.

The invention discloses a Bluetooth data encryption method based on a 32-bit chip, and the method comprises the following steps: S1, determining an encryption and decryption key through a Bluetooth end and an external opposite end, encrypting the encryption and decryption key through employing a first safety storage key, and obtaining a first ciphertext, and storing the first ciphertext; s2, when the Bluetooth end receives the second ciphertext and transmits the second ciphertext to the MCU, the MCU reads the first ciphertext; s3, decrypting the first ciphertext through the first secure storage key to obtain an encryption and decryption key, decrypting the second ciphertext by using the encryption and decryption key to obtain a plaintext, and adding one to the use count of the first secure storage key; and S4, destroying the first secure storage key reaching the upper limit of the number of times of use, and generating a second secure storage key to encrypt the plaintext and the encryption and decryption key. According to the invention, the communication between the external Bluetooth module and the MCU and the processing security of the MCU after receiving the data can be effectively ensured, the key is prevented from being easily acquired, and the reverse analysis attack aiming at the embedded equipment can be effectively prevented.

The invention relates to a chip SoC and electronic equipment. The chip SoC comprises a plurality of subsystems, each subsystem comprises a control sub-block and a data sub-block, and the data sub-blocks can be controlled and accessed by the chip SoC, or the data sub-blocks can be controlled and accessed by the control sub-blocks; the interrupt information of the data sub-block can be reported to the control sub-block for interrupt processing, or the interrupt information of the data sub-block can be reported to a chip SoC for interrupt processing. By adopting the chip SoC, access control and interrupt information reporting can be carried out between the chip SoC and the subsystem in various modes, and the flexibility and selectivity of information interaction between the chip SoC and the subsystem are improved, so that the efficiency of access control and interrupt processing is higher, and the delay of access control and interrupt processing is reduced.

The utility model discloses a power supply switching device for a load and a power supply switching device for the load. The device comprises a power supply, the load and the power supply switching device for the load. The power supply switching equipment is connected with the power supply and the load, and the power supply is connected with the load; the power supply switching device comprises a main control module, a charging module and a power supply switching circuit. The main control module is connected with the charging module and the power supply switching circuit; the power supply switching circuit is connected with the load, the charging module and a rechargeable battery of the load; the charging module is connected with the rechargeable battery. By implementing the embodiment of the utility model, the external power supply can be selected to supply power to the load through the equipment, and the charging module can be controlled to close a channel for charging the rechargeable battery of the load by the power supply, so that the selectivity of power supply and charging is improved, the influence on the service life of the rechargeable battery is reduced, and the service life of the rechargeable battery is prolonged. The battery loss is reduced, and the resource utilization rate is further improved.