37results about How to "Convenient time control" patented technology

The invention discloses a compound enzyme preparation for improving the absorption and utilization rate of a fertilizer and a preparation method thereof, and belongs to the technical field of enzyme preparations. The compound enzyme preparation is prepared from the following components in parts by weight: 100 parts of purified water, 6 to 8 parts of modified cellulase, 10 to 12 parts of immobilized protease, 10 to 12 parts of phosphatase, 10 to 14 parts of urease, 8 to 10 parts of nitrate reductase, 10 to 12 parts of pectinase, 8 to 10 parts of chitinase, 6 to 8 parts of xylanase, 10 to 12 parts of beta-glucosidase, 10 to 12 parts of superoxide dismutase and 4.5 to 6 parts of a microbial agent, the modified cellulase is obtained by chemically modifying cellulase; the immobilized protease is prepared by the following steps: adsorbing activated and coupled modified polylactic acid and a protease solution, crosslinking with glutaraldehyde, filtering, washing and drying. The compound enzyme preparation improves the fertilizer absorption and utilization rate of plants.

The invention relates to an electric heating type liquid crystal elastomer artificial muscle and a preparation method thereof, belongs to the technical field of intelligent high polymer materials, and solves the technical problems that the liquid crystal elastomer artificial muscle in the prior art is easy to harden and embrittle due to excessive filler and is weak in deformability. The electric heating type liquid crystal elastomer artificial muscle comprises two layers of liquid crystal elastomer films and an electric heating element, the electric heating element is arranged between the two layers of liquid crystal elastomer films; the raw materials of the liquid crystal elastomer film comprise a liquid crystal unit, a chain extender, a cross-linking agent and a catalyst. Wherein the liquid crystal unit is 1, 4-bis-[4-(3-acryloyloxy propoxy) benzoyloxy]-2-methyl benzene. Joule heat generated by the electric heating element can activate the liquid crystal elastomer, deformation of the liquid crystal elastomer is not limited, and therefore the liquid crystal elastomer has the advantages of being high in deformability, controllable in heating mode and time, programmable in driving and the like; and a self-sensing function is also realized, and the shape change can be monitored and regulated in real time according to the resistance.

The invention provides a Pick racket with a sectional core, which comprises a plate body and a grip body, the plate body is provided with a core, a frame and two surface layers, the frame is arranged on the periphery of the core, the core defines at least two adjacent ball hitting response parts, a sectional gap is formed between any two ball hitting response parts, and the surface layers are arranged on the surface layers. The two surface layers are respectively assembled on the core and the frame at intervals, and the holding body is formed from the bottom side of the frame of the plate body. Therefore, the core of the plate body is easy to deform through the subsection gaps among the ball hitting response parts, so that the staying time of the Pick ball on the plate body is favorably controlled, and the rotating force of the plate body on the Pick ball is also favorably controlled.

The invention relates to the technical field of gel product curing forming, in particular to curing equipment and a gel preparation device. The curing equipment provided by the invention comprises a curing tank, a buffer assembly and a partition plate, one end of the curing tank is provided with a medium inlet, and the other end is provided with a discharge port; the buffer assembly is arranged in the curing tank and is used for buffering the medium liquid entering the curing tank from the medium inlet; the partition plate is inserted into the curing groove and located between the buffering assembly and the discharging opening, and the lower end of the partition plate and the bottom wall of the curing groove are arranged at intervals. And under the action of the buffer assembly, the liquid level of the medium liquid in the curing tank is stable, and raw material forming is facilitated. The lower ends of the partition plates and the bottom wall of the curing tank are arranged at intervals, so that undercurrent is formed at the bottom of the medium liquid in the curing tank, raw materials sinking to the bottom can be driven to move in the direction of the discharging opening, and the undercurrent speed at the bottom of the medium liquid in the curing tank can be adjusted by setting the number and the positions of the partition plates; therefore, the time of the raw materials in the medium liquid is controllable.

This invention discloses an ionization power supply assembly and a power control method. The ionization power supply assembly includes an insulating base, a voltage multiplier rectifier, a first discharge needle assembly, a second discharge needle assembly, and a discharge orifice plate. The first and second discharge needle assemblies extend through the voltage multiplier rectifier and into the insulating base, with one side of the insulating base contacting one side of the voltage multiplier rectifier. A discharge orifice plate is provided at one end of the insulating base. The first discharge needle is electrically connected to the high-voltage output terminal of the positive polarity voltage multiplier plate, and the second discharge needle is electrically connected to the high-voltage output terminal of the negative polarity voltage multiplier plate. The ionization assembly is fixed to one end of a drift tube, sealing the drift tube. The discharge needles are connected to the internal gas path of the drift tube and are sealed to the insulating base and the voltage multiplier rectifier. This invention enables the ionization of air to generate an ion source with controllable polarity and duration. The ions generated by polarity conversion maintain the same polarity as the drift electric field, and the ionization intensity and ionization time are controllable.

The invention discloses a copper wire preheating device for a cable, comprising a machine, a mounting plate, a preheating box, a wire inlet, a wire outlet, a first lead frame, a second lead frame, and a guide frame, and also comprising: a plurality of groups of guided heat exchange structures, the guided heat exchange structures comprising a heat conducting rod, a contact cylinder, and a mounting frame, the copper wire enters through the wire inlet and is guided and heated by a plurality of contact cylinders before being output from the wire outlet; a plurality of groups of temperature-raising cleaning structures, comprising a heating tube, a first extrusion component and a second extrusion component, a docking component, and an external separation tube, when the heating tube heats the copper wire, the first extrusion component and the second extrusion component intermittently squeeze into the heating tube and squeeze the water vapor and dirt in the heating tube to the middle position of the heating tube, and then the water vapor and dirt are extracted through the external separation tube, the invention can improve the coordination effect between the copper wire and the insulating layer, and make the copper wire more fluent when transmitting signals.

The utility model discloses a seat cushion for learning. The seat cushion comprises a seat cushion cover, a flexible material layer is filled in the seat cushion cover, a cavity is arranged at the end of the seat cushion cover, a timer is arranged in the cavity, the timer is connected with an electric control device, and the electric control device is connected with a vibrator and a storage battery. An opening is formed in the surface of the cushion cover at the cavity, a suede layer is arranged on the surface of the cushion cover at the periphery of the opening, and a hook surface layer for sealing the opening is adhered to the suede layer. According to the utility model, the action reminding sound is very weak, so that other people cannot be hindered, the health of the student cannot be harmed, and the device is very suitable for being used in public learning occasions such as reading rooms and self-study rooms, and helps students to better control time and execute time plans set by the students in the public learning occasions.

The invention discloses a preparation method and application of a degradable hydrogel solar evaporator with a surface microstructure, and relates to the technical field of interface evaporation materials. The invention aims to solve the problems that an existing solar evaporator is low in evaporation efficiency, difficult to recycle after alkaline wastewater treatment, easy to form solid wastes and lack of an in-situ degradation environment-friendly scheme. Functional groups capable of being subjected to hydrolysis reaction under alkaline conditions are introduced into a hydrogel network, and the evaporator with a specific geometric structure is constructed by utilizing a photocuring 3D printing technology, so that the evaporator keeps structural stability and high evaporation performance in a use stage, and can be degraded according to preset conditions in an alkaline environment; therefore, the evaporator can disappear controllably after being used. According to the method, the photocuring 3D printing technology is combined, accurate design of the macroscopic shape and the microstructure of the evaporator is achieved, the surface microstructure of the evaporator is one or more of a spherical structure, a prismatic table structure and a tree-shaped structure, and the evaporation rate can be increased.

The invention relates to a novel traditional Chinese medicine preparation for children and adults, in particular to a bacteriostatic foot-protecting emulsifiable paste, which is characterized in that the product only comprises a main medicine and an emulsifier, the main medicine is cinnamon extract and is extracted by adopting a traditional steam distillation method, the concentration of cinnamyl aldehyde and other cinnamon extract of the product is 51.8%, the oral dose of cinnamyl aldehyde can be 50mg / mL for human beings, the oral dose of cinnamyl aldehyde can be 150mg / mL for animals, and the oral dose of cinnamyl aldehyde can be 4mg / mL for animals. The emulsifier soybean soft phosphatide is extracted from pure natural soybeans, the extract can be directly stirred with the soybean soft phosphatide to form cream, the soybean soft phosphatide is widely used and eaten at home and abroad, compared with existing cosmetics, the cosmetic has the advantages of no toxicity, no side effect and safety and reliability in use, the technology is simple, the equipment is low in cost and easy to obtain, the occupied area is small, and the cosmetic is suitable for large-scale popularization and application. The requirements for operators are low, technical training is not needed, timing and quantification can be achieved, residues can be produced into antibacterial footbath liquid through simple alcohol extraction, the residues are free of pollution and easy to clean, and the product is used for foot care at night and does not affect use of other articles in the daytime.

The present invention discloses a wax bag comprehensive performance testing platform, comprising a water pool, a temperature insulation board is installed in the middle of the water pool, a slide rail is installed inside the water pool, an optical screening detector is connected to the inner wall of the water pool, a driving device and a detection element are also installed on the slide rail, and the optical screening detector is located above the slide rail. The present invention repeatedly exchanges multiple thermostats between cold water and hot water to quickly detect whether the wax bag inside the thermostat will leak or be damaged within a specified number of times in a relatively short time, and the entire switching process adopts the form of a slide rail, and the driving device will push multiple detection elements equipped with thermostats to allow the thermostat to repeatedly switch between cold water and hot water. First of all, the entire movement process is simple, and it only needs to circulate continuously on the track, and there is no need to use a mechanical arm to repeatedly take it out and put it in from cold water and hot water.

The present invention relates to a carbon fiber multifilament spline reinforcement method and device, which solves the technical problems of unsatisfactory reinforcement effect and inaccurate test results of existing carbon fiber multifilaments, and is provided with an upper pressing plate, a lower pressing plate, a transmission pressurizing device, a transmission device, a thermal insulation layer and a control system, wherein the upper pressing plate, the lower pressing plate, the transmission pressurizing device and the transmission device are arranged in the thermal insulation layer, and the control system is connected to a computer. The present invention also provides a carbon fiber multifilament spline reinforcement method. The present invention can be used in the field of carbon fiber multifilament spline preparation.

The invention discloses an oven capable of enabling baked food materials to have special fragrance, which comprises an incense burner for containing plants or incense stones capable of generating non-toxic and harmless fragrance through baking, the incense burner is arranged in an interlayer between a cavity of the oven and a shell of the oven, the fragrance generated by the incense burner is sent into the cavity by a fan through an air supply pipe connected to the incense burner, and the fragrance generated by the incense burner is sent to the shell of the oven. The incense burner is arranged outside the cavity, so that food materials can be smoked and roasted, the incense burner is not influenced by a high-temperature environment in the cavity, the incense burner does not need to be made of a high-temperature-resistant material, the temperature of roasting spices and the roasting time can be accurately controlled, and the roasting efficiency is improved. Therefore, the time for conveying the fragrance into the cavity is controlled or the fragrance is quantitatively conveyed.

A second brake control system for a tower crane comprises: a second brake, arranged on a hoisting mechanism of the tower crane, comprising a brake mechanical component and a brake control component, the control end of the brake mechanical component cooperates with the oil circuit of the hoisting mechanism; the control end of the brake control component is connected to the brake mechanical component by signal; a detection unit, arranged on the second brake, comprising a gap sensor and a confirmation sensor, the signal output end of the gap sensor is connected to the signal input end of the hydraulic station detection unit by signal; the signal output end of the confirmation sensor is connected to the signal input end of the hydraulic station detection unit by signal; and a hydraulic station detection unit, arranged on the hoisting mechanism, the signal input end is connected to the signal output end of the confirmation sensor by signal; its signal output end is electrically connected to the signal input end of the brake control component through a control circuit. The beneficial effects of the present invention are: less strong impact on the tower crane during the second brake emergency stop, reduced failure rate and high safety.

The present application relates to a kind of electric heating type liquid crystal elastomer artificial muscle and its preparation method, belong to intelligent polymer material technical field, solve the technical problem that weak deformation capacity of liquid crystal elastomer artificial muscle filler in prior art is too much to be hard and brittle easily.The electric heating type liquid crystal elastomer artificial muscle of the present application includes two layers of liquid crystal elastomer film and electric heating element;Electric heating element is set between two layers of liquid crystal elastomer film;The raw material of liquid crystal elastomer film includes liquid crystal base element, chain extender, crosslinking agent and catalyst;Wherein, liquid crystal base element is 1,4- Bis-[4-(3-acryloyloxy propoxy) benzoyloxy]-2-methyl benzene.The joule heat generated by electric heating element can activate liquid crystal elastomer, and will not limit the deformation of liquid crystal elastomer, so as to show the characteristics such as strong deformation ability, controllable heating mode and time, programmable drive;Also have self-sensing function, can be monitored and regulated shape change in real time according to the size of resistance.

The invention relates to the technical field of high polymer materials, and discloses a two-component polyurethane composite material for pipeline repair as well as a preparation method and application thereof.The two-component polyurethane composite material comprises a component A and a component B. The component A is prepared from the following raw materials in parts by weight: 30-100 parts of diisocyanate, 80-120 parts of polyether polyol, 1-5 parts of a curing agent, 1-5 parts of a curing agent, 1-5 parts of a curing agent and 1-5 parts of a curing agent. 200 to 300 parts of polyphenyl polymethylene polyisocyanate, 1 to 1.5 parts of micromolecule chain extender, and 80 to 200 parts of plasticizer; the component B is water-soluble silicate; the double-component polyurethane composite material provided by the invention is used for pipeline repair, and is excellent in strength and wear resistance, controllable in operation time and high in cost performance.

The utility model provides a passivate device of galvanized steel pipe relates to passivate device technical field, the utility model discloses a storage pool, the top fixedly connected with the inclined frame of storage pool, the bottom fixedly connected with support frame of inclined frame, support frame and the one side fixed connection of storage pool, the one side fixedly connected with the collecting pipe of inclined frame, the one end of collecting pipe is provided with the connecting pipe, the one end away from collecting pipe of connecting pipe sets up in the bottom of storage pool, the one end mounting of collecting pipe has water pump, water pump sets up in the one end of connecting pipe, the one side evenly fixedly connected with support pipe of collecting pipe, the top evenly installed with shower nozzle of support pipe one side, the one side fixedly connected with the screen of inclined frame and the inner wall of storage pool, when using the adjusting device, place the steel pipe on the top of rotating plate, control rotating plate to drive rotating rod to rotate in the inner wall of support block, like this, it is convenient to control the time of steel pipe through rotating plate.

The present application belongs to the technical field of natural product chemical modification, and particularly relates to a chemically modified rare ginsenoside derivative, a preparation method and application thereof. The present application takes rare ginsenoside as raw material, introduces a sulfate group by sulfating modification on the rare ginsenoside to obtain a chemically modified rare ginsenoside derivative; the modifier used in the sulfating modification is a sulfonating agent. The rare ginsenoside is synthesized by conversion with ginsenoside Rb1 as raw material and AlCl3 as catalyst in an ethanol system. The modification method of the present application is simple in operation steps, does not require special equipment, is suitable for large-scale production, and has a broad application prospect in the field of drug preparation development and the like.

The invention discloses an automobile assembly line and an automobile assembly method.The automobile assembly line comprises a first overturning station, a second overturning station, a third overturning station and a fourth overturning station, the production conveying device is located on the ground and used for receiving and transporting the overturned chassis; the second overturning station is located on the production conveying device and located behind the first overturning station along the conveying path of the production conveying device, and the chassis is overturned for the second time in the second overturning station; a rear axle assembly station and a front axle assembly station. Before the front axle component and the rear axle component are assembled to the chassis, the chassis is turned over for the first time, the chassis can enter the inverted state, the chassis does not need to be hoisted when the front axle component and the rear axle component are assembled, and therefore an air conveying line can be omitted, the construction period of an automobile assembly line can be shortened, and the cost can be reduced; and the device is suitable for quickly guiding chassis products.

The utility model discloses a kind of soft-start control circuit based on output voltage feedback, soft-start control circuit includes buffer circuit and control circuit, the buffer circuit includes operational amplifier;The buffer circuit is used to prevent the overshoot phenomenon of output voltage, makes output voltage curve change smooth;The control circuit includes capacitor, control tube, voltage divider component and discharge tube, the capacitor is connected with the drain of the discharge tube and the operational amplifier, the voltage divider component is connected with the capacitor and the control tube respectively;The control circuit is used to control soft-start time.The utility model can improve the response speed of soft-start control circuit, avoid appearing output voltage overshoot phenomenon;And it can accurately control soft-start time, effectively controllable limit in power-on process inrush current.

The utility model discloses a rice residue filtering structure for storing and placing in a water tank, which relates to the technical field of rice residue filtering structures and comprises a tank body, a tank ring is fixedly connected to the top surface of the tank body, a baffle ring is fixedly connected to the upper end of the inner wall of the tank body, and a filtering component is arranged in the tank body; the filter assembly comprises a filter tank arranged in the tank body, the top surface of the filter tank is fixedly connected with a fixing ring movably connected with the baffle ring, the bottom surface of the inner wall of the filter tank is fixedly connected with a convex pipe, and the top surface of the convex pipe is in threaded connection with a fixing cover; the baffle is controlled to ascend and descend through cooperation of the connecting rod and the spring, the descending time of the baffle is conveniently controlled through cooperation of the rotating block on the connecting rod and the semicircular baffle ring on the inner wall of the protruding pipe, water is discharged through descending of the baffle, the filtering structure is sealed through the baffle, and peculiar smells are prevented from being left in the filtering structure and emitted.

This utility model discloses a cultivation device for tissue culture seedlings, belonging to the technical field of cultivation devices. The device further includes an upper box body snapped onto the upper side of a base box; a second water pump is fixedly connected to the right side of the base box; a first water pump is fixedly connected to the right side of the upper box body; a water pipe is fixedly connected to the right side of the first water pump; a water tank is disposed on the outside of the base box; the second water pump and the water pipe are connected to the water tank; an atomizing nozzle is fixedly connected to the left side of the first water pump; a pair of sealing plugs are embedded on the front and rear sides of the upper box body respectively; by setting gauze mesh and ventilation holes, the air permeability of the tissue culture seedling roots is improved. Simultaneously, the gauze mesh prevents the soil and moisture in the soil from diffusing outwards, allowing a large amount of water to flow out from the mesh plate. The gauze mesh only absorbs a portion of the water and becomes moist, which is beneficial for the rapid growth of the tissue culture seedling roots. At the same time, the sealing plugs allow the tissue culture seedling leaves to come into contact with the air, facilitating control of the air exchange time between the inside of the upper box and the outside environment, thus improving cultivation efficiency.

This invention discloses a method for preparing Yuanjiang asparagus extract and its application. The method uses fresh Yuanjiang asparagus tender stems as raw material. After selection, washing, freeze-drying, pulverizing, and sieving, choline chloride and 1,2-propanediol eutectic solvent are added for constant-temperature extraction. After ultrasonic temperature control, cellulase and pectinase are added for complex enzymatic hydrolysis. After heating to inactivate the enzymes, centrifugation is performed, and the supernatant is collected to obtain the crude extract of Yuanjiang asparagus saponins. This method has high extraction efficiency, and the obtained asparagus saponins have strong antioxidant activity, exhibiting strong scavenging ability against DPPH, ABTS, and hydroxyl radicals, as well as Fe... 2+ The chelation rate was high, and it showed significant in vitro inhibitory effects on the proliferation of human colorectal cancer cells Caco-2 and human hepatocellular carcinoma cells HepG2. The raw material used in this method is fresh, tender stems of Yuanjiang asparagus, which is widely available and of excellent quality. The extraction process is green, environmentally friendly, and simple, not only improving the comprehensive utilization value of Yuanjiang asparagus but also providing a new method for extracting natural saponin active ingredients. The obtained asparagus saponins can be used to develop antioxidant and anti-tumor functional foods, showing potential market prospects.

The utility model relates to the technical field of tablet presses, in particular to a precise control plate automatic fluorescent tablet press which comprises a workbench, stand columns are fixedly connected to the four corners of the top of the workbench, a supporting plate is fixedly connected to the tops of the stand columns, a mold is fixedly connected to the top of the supporting plate in a penetrating and embedded mode, and a pressing rod is placed at the top of the mold in an inserted mode. And a pressing and holding mechanism is installed at the top of the supporting plate, an upward punching mechanism is installed at the top of the workbench, a touch screen is fixedly connected to the front side of the top of the workbench in an embedded mode, and a protection mechanism is installed on the front side of the top of the workbench. According to the feeding device, the protective cover is pulled to move before feeding, the sliding block moves on the guide rod, the second magnetic strip and the first magnetic strip make contact and are magnetically attracted and fixed, and then the protective cover is fixed, so that the feeding device has the advantage that the touch screen can be protected, large materials are effectively prevented from falling off to damage the touch screen when the materials are added, and the service life of the touch screen is prolonged. And the use safety is improved.

The invention discloses a mechanical delay linear motion structure for fuze and a using method. The mechanical delay linear motion structure comprises a linear motion assembly, a safety structure and a damping medium. The linear motion assembly comprises a cylinder body, a piston and an energy storage element; the piston divides the interior of the cylinder body into an upper cavity and a lower cavity in the vertical direction, and the upper portion of the piston extends out of the cylinder body. The energy storage element is arranged in the upper cavity; a damping medium is arranged in the lower cavity, a drainage channel is arranged on the lower portion of the cylinder body, and a quick-release sealing piece is arranged at the drainage channel. According to the scheme provided by the invention, one-way delay linear motion can be realized, the motion is accurate, the time is controllable, and the safety and reliability of a fuze system can be improved; as an independent functional structure module, the operation is convenient, the structure is simple, and the manufacturing cost is low; the fuse delay releasing device can be used as a manual delay releasing device of a fuse, can realize delay within a certain time range after releasing the fuse, and provides a trigger signal for a fuse mounting structure.

The invention provides a high-conductivity acetylene carbon black aggregation state structure regulation and control method which is characterized in that a gas-solid mixture of acetylene and carbon black seed crystals is used as a raw material, and the method comprises the following steps: step 1, heating the raw material to a preset temperature to pre-activate acetylene; 2, dividing an acetylene cracking reaction area into a nucleation area, a cross-linking area and a shaping area, setting different temperatures in the three areas, and enabling acetylene to sequentially flow through the nucleation area, the cross-linking area and the shaping area for reaction to generate acetylene carbon black; and 3, quantitatively conveying a cooling medium to cool the acetylene carbon black, so that the cooling rate of the acetylene carbon black is stable. The invention discloses a reaction tower for preparing a high-conductivity acetylene carbon black aggregation structure. The reaction tower comprises a mixing section, a preheating section, a nucleation section, a crosslinking section, a shaping section and a cooling section from top to bottom, a heat insulation layer is arranged between every two adjacent sections of the nucleating section, the cross-linking section, the shaping section and the cooling section.

The utility model relates to an automatic feeding device of a bar shearing machine, which belongs to the field of bar processing and comprises a worktable, a mounting block fixedly mounted at the top of the worktable, a transmission limiting component mounted on the mounting block and a quantifying component mounted on the mounting block. And the conveying limiting assembly comprises a moving assembly mounted in the mounting block, a placing frame fixedly mounted at the top of the moving assembly, a driving motor fixedly mounted on one side of the placing frame, and a bidirectional lead screw mounted at the output end of the driving motor. According to the automatic feeding device of the bar shearing machine, by installing the conveying limiting assembly, two-side limiting treatment can be conveniently carried out on conveyed bars, the situation that the bars roll down from the two sides during discharging is reduced, the bar conveying quality is improved, conveying and shearing treatment can be conveniently carried out on the limited bars, the device using efficiency is improved, and the practicability is high. And the quantitative assembly is installed, so that the discharging quantity and time of the rod materials are conveniently controlled, and the shearing quality of the device is further improved.

The invention discloses an elevator star sealing contactor contact adhesion test method, which comprises a display system, a control system, a driving system and an execution system, and is characterized in that the control system comprises a solid-state relay, and the display system comprises a switch; the test method comprises the following steps: S1, a variable voltage regulator is adopted to supply power to a system, and voltage is regulated to a voltage value matched with the load demand of a tested elevator star sealing contactor; s2, outputting a solid-state signal through a control system, controlling a solid-state relay to work in a random voltage switching SCR output mode, and shortening the link transmission time and controlling the detected star sealing contactor to act at high frequency by utilizing the high-speed response low-delay characteristic of the solid-state relay; meanwhile, feedback signals of a solid-state relay are collected, and the delay time of a control system of the system is obtained through calculation of a built-in algorithm of the control system, so that the contact feedback time of the star sealing contactor is accurately calculated. The testing process is transparent, data are clear, real-time monitoring is achieved, and results are judged in real time.

The utility model relates to the field of energy storage converters, in particular to a pre-charging circuit of a battery pack, a pre-charging control system, the battery pack and electric equipment, and the pre-charging circuit is arranged in the battery pack and comprises a transistor Q and a charging and discharging energy storage circuit; wherein the first end of the transistor Q is connected with the positive electrode of a battery cell module in the battery pack, and the second end of the transistor Q is electrically connected with the charging and discharging energy storage circuit; one end of the charging and discharging energy storage circuit is connected with the total positive electrode of the battery pack, and the other end of the charging and discharging energy storage circuit is electrically connected with the total negative electrode of the battery pack and the negative electrode of the battery cell module; the control end of the transistor Q is suitable for being connected with an on-off regulation and control signal. The pre-charging current and the pre-charging time of the capacitor are adjusted by controlling the conduction of the transistor Q, so that the energy consumed in the pre-charging resistor is reduced, and the pre-charging current and the pre-charging time are controllable.

The present invention relates to an implantable neural electrical stimulation system, which is characterized by comprising a first shell and a second shell; a wireless receiving coil and a wireless receiving module are arranged in the first shell for being arranged in the subcutaneous tissue of a user, the wireless receiving module is fixedly connected to one end of two electrodes, and the other end of the two electrodes passes through the first shell and is fixedly connected to an electrode-tissue connecting unit; the second shell is arranged on the user's skin surface corresponding to the first shell, and a central processing module, a wireless transmitting coil, a wireless transmitting module and a power supply module are arranged in the second shell; the central processing module is used to drive the wireless transmitting module to generate an electromagnetic signal of corresponding amplitude and frequency; the wireless transmitting coil is used to output the electromagnetic signal, and the wireless receiving coil is used to sense the electromagnetic signal and generate an induced current; the wireless receiving module is used to modulate the induced current and convert it into an electrical stimulation signal; the electrode-tissue connecting unit is used to transmit the electrical stimulation signal. The present invention can be widely used in the field of implantable medical devices.

The invention discloses an automatic growth raw material adding device, an automatic growth raw material adding method and application. The automatic growth raw material adding device comprises a conveying channel, a first air chamber, a second air chamber and a third air chamber, the first gas chamber is used for accommodating first growth source gas; the second gas chamber is in heat conduction connection with the first gas chamber and is used for accommodating second growth source gas; the third gas chamber is adjacent to the first gas chamber, is communicated with the growth raw material storage chamber and is used for accommodating third gas; when the temperature of the second growth source gas is higher than that of the first growth source gas, the first gas chamber enters an expansion state and extrudes the third gas chamber, so that at least part of third gas in the third gas chamber enters the growth raw material storage chamber and applies pressure to the growth raw material in the growth raw material storage chamber; and then at least part of the growth raw materials are driven to be transferred into the at least two reaction chambers along the conveying channel. The growth raw materials can be automatically added in two different growth modes at the same time, and the method can be applied to the field of growth of gallium nitride or aluminum nitride substrates.