201 results about "Explosive power" patented technology

A performance monitoring system and method for edging or near-edging sports includes a pair of measurement apparatus associated with each foot or of an athlete. Each measurement apparatus includes at least one sensor, adapted to cooperate with the corresponding foot or boot and the corresponding surface-engaging equipment to measure and provide at least force data exerted on said surface-engaging equipment. A data receiver cooperates with each sensor to receive said data and to communicate said data to a data processor. The data processor is adapted to determine from said data, for each sensor, at least the following derived characteristics: force over time, a peak force, delta time, and corresponding explosiveness. Feedback of the characteristics is provided to a user.

The invention discloses a method for evaluating the explosive power in an explosive based on a shock wave overpressure and a quasi-static pressure. Evaluation test of the explosive power on the explosive to be evaluated and TNT, having the same mass, is carried out, an explosive power evaluation parameter kind, a measurement point laying technology and a data processing technology are determined according to the explosion characteristics in the explosive, and the method for calculating the equivalent TNT of the explosive power based on the shock wave overpressure and the quasi-static pressureis established. The method breaks through the shock wave overpressure used as a single index of the explosive power of the explosive, can completely reflect the explosive power characteristics in theexplosive, achieves a scientific and reasonable evaluation result, and can be used for selecting an explosive formula and evaluating the explosive power.

The invention relates to a method for controlling blasting by double-medium decoupling fracture and damage and a blasting cartridge thereof. The method adopts cylindrical explosive, detonator or primacord to explode a hole on a blasted rock body. The method is characterized in that water and air are simultaneously used in the hole to separate explosive, wherein, the water medium is aligned to the side of a free surface, while the air medium is aligned to the side of a reserved surface; the uniform distributing state of explosive energy can be changed by using the characteristics that the two media have different efficiencies of transmitting energy, thereby achieving the function of completely destroying one side and protecting the reserved surface during blasting, and forming a flat fracture surface. The blasting cartridge consists of an outer tube, an inner tube and a separating wall, wherein, the separating wall separates a cavity formed between the outer tube and the inner tube into a medium chamber for containing the water medium and a medium chamber for containing the air medium; and an explosive chamber for placing the cylindrical explosive is arranged in the inner tube. The invention has the advantages of easily operating, improving explosive power and agglomerating rate, protecting stability of wall rock, reducing harm of dust and noise, and the like, and can be widely applied to smooth blasting projects such as tunnels, side slopes, water conservancies, mining, and the like.

The embodiment of the application provides a method and device for data prediction based on a time sequence. The method includes the following steps: obtaining historical time sequence data of a plurality of category objects, wherein the category objects include one or more data objects; screening the plurality of category objects to obtain feature category objects, the feature category objects being category objects containing feature data objects, and feature data objects being data objects whose life cycles are smaller than a preset time threshold value; and based on the historical time sequence data corresponding to the feature category objects, forecasting target data objects from the data objects contained in the feature category objects, the target data objects being data objects by which future time sequence data generated within a future first preset time period satisfy a preset growth trend. The method can forecast target data objects having explosive power in the near future according to the principle of time sequence data, so that a forecasting result better coincides with reality, and the accuracy rate is higher.

The invention relates to an electric spark induced controlled combustion and discharge machining corrosion removing method, and is characterized in that in the process of conventional electrical discharge machining (EDM), the gas which can generate combustion heat release effect with the metal materials to be machined is pumped into the machining area intermittently to ensure machining alternating between electric spark induced controlled combustion and conventional EDM; under the action of conventional EDM, the metal materials on the surface layer exceed the ignition point and form active state and generate combustion reaction with the pumped gas to generate the combustion products and simultaneously release plenty of heat; the heat directly acts on the metal base materials so that the metal base materials with volume duplicating that of the combusting materials are heated to molten state; and the combustion products and the molten metal materials are thrown off the matrix under the combined action of the heating and explosive power generated by electric spark discharge and flow scouring. The method has the advantages of high efficiency, low loss, low cost, safety and no pollution; and the problems of sizes, rigidity and the like of the machine tools of large structures can be solved simultaneously.

The invention provides preparation and application of a long-acting high-affinity softener prepared from essence microcapsules. The long-acting high-affinity essence microcapsule softener is prepared in the following steps: preparing a compound dispersant by using a nonionic surfactant and amphiphilic macromolecules, and preparing the essence microcapsules by taking essence as a core material and taking etherified melamine resin as a wall material; and preparing a fragrant microcapsule softener by taking the essence microcapsules as a raw material. The invention further provides an application method of the long-acting high-affinity fragrant microcapsule softener. The essence microcapsules prepared by a simple, convenient and environment-friendly method can be suitable for softeners, laundry detergents and the like of various ionic systems, the essence content can be 20-30 percent, and the solid content can be 22-35 percent. Compared with other commercially-available essence microcapsule, the solid content of the essence microcapsules can be 10-15 percent higher than that of the commercially available essence microcapsule products, the essence coating rate can be 60-70 percent, and the stability is good. Meanwhile, the long-acting high-affinity fragrant microcapsule softener prepared by taking the essence microcapsules as a raw material is good in the perfuming effect on fabrics and long in fragrance lasting time on fabrics, the fragrance can last for six months in a standing state, and high fragrance explosive power can be achieved by rubbing.

The invention puts forward a trend analysis method and device of multi-source time sequence data. The method comprises the following steps of: independently obtaining original data of different structures from different data sources, and parsing the original data of different structures into multiple pieces of time sequence data with a uniform structure; cleaning the multiple pieces of time sequence data with the uniform structure, and identifying the multiple pieces of time sequence data which describes the same object; utilizing the multiple pieces of time sequence data which describes the same object to carry out mutual checkout and supplementation; and calculating the explosive power of each point in time in multiple pieces of accurately-related time sequence data, obtaining the explosive power sequence of the multiple pieces of accurately-related time sequence data, carrying out weighted summation on the explosive power sequence of the multiple pieces of accurately-related time sequence data which describes the same object, and calculating the comprehensive explosive power sequence of the object. By use of the method, the own characteristics of the multi-source time sequence data are fully utilized, the multiple pieces of accurately-related time sequence data which describes the same object are adopted to carry out calculation and correction processing on the comprehensive explosive power sequence of the object to realize more accurate and visual trend analysis.

Methods, systems, and computer-readable media are provided for enabling improvements in athlete training and injury management through entropy and third-order spectral analysis of digitized force-vs-time time series from movements. In embodiments, entropy and / or bispectral statistics are determined using time-series information obtained from movements of an athlete, such as squat jump and countermovement jump maneuvers, using a biomechanical sensor, such as a digital force plate apparatus. These statistics may be used to facilitate sports medicine and health management of the athlete. In some embodiments, where athletes are involved in sport that involves explosive power development in the lower extremities and extensive running, cutting, jumping or other movement having risk of injuries to the lower extremities, time series force plate data are obtained and transformed to calculate entropy and bispectral statistics, from which functional status of the lower limbs and readiness for safe return-to-lay may be ascertained.

The invention discloses an experimental system and a method for simulating a composite load of an explosion shock wave and a single fragment. The method comprises steps of: determining parameters, such as the density and the length of a foamed aluminum projectile, the diameter and the depth of an opening, the length and the diameter of a fragment simulated projectile, and the launch speed of a composite projectile, according to the composite load parameters of the shock wave and the fragment desired simulated; preparing a composite projectile based on the determined composite projectile parameters; and ejecting the prepared composite projectile out of the primary light gas gun at the determined speed, thereby forming a composite load of the shock wave and the single fragment desired simulated. According to the experimental system and the method for simulating the composite load of the explosion shock wave and the single fragment a method for scientific researchers and engineering designers to simulate the explosive power of an explosive device with a shell is provided. The method can be widely applied to the simulation test of explosive impact loads in the fields of the transportation, the safety protection, the military, and the like; can effectively save the test cost; and has considerable economic benefits.

The invention discloses a servo motor torque control system in a fitness rehabilitation instrument and a control method. The system comprises a fitness rehabilitation instrument, a servo motor, an intelligent control panel, an identity recognition module, a main controller, a cloud server and a sensor, wherein the servo motor is connected with the fitness rehabilitation instrument and used as a resistance device of the fitness rehabilitation instrument; the main controller is used for controlling the torque of the servo motor according to preset target resistance parameters and current user exercise information detected by a sensor in real time. The system has the effects that constant torque control can be provided, the problems that resistance generated in a conventional weighing mode islarge in inertia, speeds cannot be changed too rapidly in the exercise process, and the explosive power exercise effect is not good, can be solved, the torque can be controlled according to parametervariations, the problem that the resistance generated in the conventional weighing mode is not applicable to the whole exercise process, and only single exercise modes are available, can be solved, resistance curves (parameters) are stored in the main controller or a cloud service platform, the system is customized for users by exercise experts or rehabilitation doctors, and scientific healthy training can be provided for users.

The invention discloses a bionic hopping robot driven by an internal combustion engine. The bionic hopping robot is composed of a transmission mechanism, a hopping mechanism, a control device, the engine and a worm and gear box. According to the robot, the engine is adopted as a power source for driving and assists an extension spring in increasing the energy utilization rate. The control device controls an electromagnetic clutch to rotate forwards and reversely to control the hopping mechanism to extend and shrink. A steering engine controls the speed and power of the engine. The hopping mechanism imitates a framework of a biological open chain through a closed-chain gear five-bar mechanism, and the angle between a spring installing bar and a hopping auxiliary frame can be adjusted. The mechanism mechanical conversion performance is achieved. The length of a crank can be adjusted, and the crank is used for adjusting the extension acceleration, the instant explosive power and good hopping performance of the hopping mechanism. The robot hops to advance by imitating the hopping characteristic of kangaroos, arc-shaped foot soles are changed into flexible feet in a multi-sheet overlapped mode, and the toughness and buffering and vibration adsorption capacity of the foot soles are greatly improved. The bionic hopping robot has the high bionic degree, good hopping performance and high adaptability to the terrain environment.

The invention provides a primer set for amplifying genes related to exercise ability and a detection kit, and relates to the technical field of application of SNPs. The primer set comprises a specificprimer and a single base extension primer; the nucleotide sequence of the specific primer is shown in SEQ ID NO. 1 to 52; and the nucleotide sequence of the single base extension primer is shown in SEQ ID NO.53 to 78 n. The amplification primer and extension primer designed by the invention can detect 26 SNP sites in the same reaction, and are used for developing exercise ability detection kit and guiding reasonable movement. In terms of exercise guidance, the genetic test of the invention can understand the endurance, explosive power, strength and the like of the human body, and provide scientific reference for rational exercise. The movement-related genes are jointly detected and all the items are detected at a time, so that the primer set and the detection kit are most comprehensive incoverage of detection genes in the exercise ability gene detection products.

The invention provides a detonator startup hydraulic setting tool and application thereof. The setting tool comprises an electronic control mechanism, a detonator startup mechanism, a hydraulic transfer mechanism and a power execution mechanism which are sequentially connected from top to bottom. The detonator startup mechanism detonates a detonator according to a startup signal transmitted by theelectronic control mechanism, shears off a startup shear pin, pushes a piston to reach a preset position and communicates a hydraulic transfer passage; the hydraulic transfer mechanism is used for transferring a hydraulic pressure in a shaft into a gap between a sheath and a center pipe, so as to enable the sheath and a connection rod to generate relative motion; the power execution mechanism transfers a pulling force generated by the hydraulic pressure to a bridge plug or a ball seat, so as to enable the bridge plug or the ball seat to release and complete setting. The detonator is selectedto replace conventional gunpowder because the detonator is a standard part, provides stable explosive power, is small in size, is a common part in fire work, is more convenient to store and transportthan powder grains and is convenient for flexibly organizing construction in the scene, and meanwhile, the setting tool using the detonator is easy to clean and recycle, so that cost can be reduced.

Pressure-resistant high-power emulsified seismic source powder column and its preparation method, the ratio of raw materials is: ammonium nitrate 74-92, sodium nitrate 0-11, crystal modifier 0-16, water 3-10, composite wax 4 ~6, emulsifier 1~2, microsphere foaming agent 0.1~1, aluminum powder 3~6. The method includes: A, water phase solution preparation; B, oil phase solution preparation; C, continuous emulsification; D, high temperature sensitization and addition of aluminum powder; E, automatic drug charging; F, sealing, cold medicine, packaging. The invention has the advantages that: the pressure-resistant high-power seismic source charge column has good pressure-resistant performance, can detonate normally when the pressure in deep water is 0.3 MPa, and has high explosive power. At the same time, since the density regulator used is a microsphere foaming agent, it can be sensitized under the condition of 100-120°C. The sensitized material has a high temperature and good fluidity, which is beneficial to the automatic powder filling machine. Improve work efficiency.

The invention relates to a pouring-type high-energy insensitive explosive and a preparation method thereof. In order to solve the problem of a low energy level of traditional butylated hydroxy castingPBX explosives, an energy-containing adhesive and an energy-containing plasticizer are introduced as a binder system, and through addition of high-energy explosives and metal fuel components, the prepared pouring-type PBX explosive has high energy characteristics; the explosive formula has a density greater than 1.85 g / cm<3>, the detonation velocity is greater than 7800 m / s, and the explosive power is that of 1.9 times or above the TNT equivalent; and at the same time, the explosive formula has good low-vulnerability, and especially has mild reactions in slow-speed burning tests, and the reaction level does not exceed a detonation level.

The invention relates to the technical field of biomimetic robots, in particular to a jump robot. The robot capable of imitating cat jump comprises a trunk mechanism, a detection control mechanism, front leg jump mechanisms and rear leg jump mechanisms, the front leg jump mechanisms and the rear leg jump mechanisms are mounted in the front and the rear of the trunk mechanism, structures of the front leg jump mechanisms are as same as those of the rear leg jump mechanisms, structures of four limbs of mammals are referenced when the leg jump mechanisms are designed, each leg jump mechanism is designed into three sections with two joints, and the two joints are driven by a servo motor and a direct-current motor, so that legs flexibly move. According to the rotor, four-bar linkages with elasticity components are designed by imitating muscle tendons of real animals, spring has buffering and power assisting functions in the jumping and running process of the robot, explosive power can be instantaneously released by stored power, high jump and long jump performances of the robot are improved, and the utilization efficiency of energy is improved.

The invention discloses a fruity nutrient beverage formula for enhancing explosive power. The fruity nutrient beverage formula for enhancing the explosive power is characterized in that per L(liter) of the beverage is prepared from the following components by weight: 50-70g of white granulated sugar, 6-8g of honey, 2-8g of isomaltulose, 4-12g of fructose, 0.2-0.4g of magnesium sulfate heptahydrate, 0.1-0.3g of potassium citrate, 0.12-0.18g of sodium citrate, 0.9-1.2g of citric acid monohydrate, 0.3-0.6g of vitamin C, 0.02-0.1g of vitamin E, 0.3-0.5g of taurine, 10-18mg of nicotinic acid, 1-1.6mg of vitamin B6, 1-1.8 micrograms of vitamin B12, 50-180g of fruit juice, 0.1-0.5g of wolfberry powder, 0.1-0.5g of black tea powder, 0.01-0.12g of ginseng extract, 0.1-0.5g of grape powder, 0.1-0.5g of maca powder, 1.0-1.4g of guarana extract, a proper amount of essence and the balance of water. Compared with the prior art, the fruity nutrient beverage formula for enhancing the explosive power has the effects of improving the explosive power, resisting exercise fatigue and improving exercise tolerance. The invention also provides a production process of the fruity nutrient beverage for enhancing the explosive power.

The invention provides a pulverized coal ammonium nitrate fuel oil explosive and a preparation method and application thereof. The pulverized coal ammonium nitrate fuel oil explosive is prepared from the following raw materials in parts by weight: 70.9-93.6 parts of porous granular ammonium nitrate, 1-25 parts of pulverized coal, and 4.1-5.4 parts of diesel oil. The preparation method comprises the following steps: (1) preparing the porous granular ammonium nitrate, pulverized coal and diesel oil according to the parts by weight; (2) uniformly mixing the porous granular ammonium nitrate, the pulverized coal and the diesel oil to obtain the pulverized coal ammonium nitrate fuel oil explosive. The pulverized coal ammonium nitrate fuel oil explosive is applied to surface mine blasting including rock loosening blasting, blasting for throwing rock and millisecond blasting. The pulverized coal ammonium nitrate fuel oil explosive has great explosive power, wave impedance similar to that of rock, and high throwing rate in blasting for throwing rock, and has low unit consumption, good blasting effect and low cost in various blasting processes. The preparation method is simple. The blasting effect is good in the blasting process.

The invention is to provide a sock to increase persistency or explosive power and improve the athletic competence during running or walking. The sock (1) comprises a first cylindrical toe holding part (3); a basically annular heel stop part (4); a first connecting piece (5) connected with the first toe holding part (3) and heel stop part (4); a skidproof moving plate (6); and a toe covering part (7) to form a strong constricting force part (2) with stronger constricting force than other parts of the sock. Therefore, when worn, the sock causes the first toe held by the first toe holding part (3) which is tightened from back side by the force from the heel stop part (4) and first connecting piece (5) to move inwards opposite to other toes.

The invention discloses a marine diesel engine piston ring top ring material DPR-DGIII and a casting method. Alloy cast iron DPR-DGIII formed through pouring of a small number of copper alloy elements, manganese alloy elements, molybdenum alloy elements and other alloy elements is added in cast iron, the graphite creep ratio reaches 80% or above, the content of pearlite in a matrix structure is 95% or above, the bending strength Rb is larger than 740 N / mm<2>, the elasticity modulus E can reach 131-159kN / mm<2>, the brinell hardness HB ranges from 250 to 290, and the requirement of foreign imported piston ring material technology index is met. The alloy cast iron DPR-DGIII has the beneficial effects that hardness is moderate, bending strength is high, abrasion and corrosion resistance is good, and the impact resistance is greatly improved; and the using requirement of modern high-explosive-power diesel engines is met, various technology indexes meet the CV1 standard requirement of the MAN-B&W material standard, and the marine diesel engine piston ring top ring material DPR-DGIII can replace imported materials CV1 and is used for MAN-B&W diesel engine top rings.

The invention relates to a high and low temperature resistant emulsion explosive and a preparation method thereof, and belongs to the technical field of emulsion explosives. The technical problem to be solved by the invention is to provide the high and low temperature resistant emulsion explosive. The explosive is prepared from the following components in parts by weight: 93-94 parts of a water-phase material, 6-7 parts of an oil-phase material, 0.8-1.2 parts of expanded graphite and 0.3-0.6 part of a foaming agent, wherein the water-phase material consists of the following components in partsby weight: 76-85 parts of ammonium nitrate, 2-5 parts of sodium nitrate, 1-4 parts of sodium perchlorate, 1-4 parts of ammonium chloride, 0.8-1.2 parts of ethylene glycol, 0.8-1.2 parts of a surfactant and 9-12 parts of water; and a specific stabilizer is added into the oil phase material. Explosive, the explosive is high in explosive power, good in stability, good in safety and resistant to highand low temperature, can be repeatedly used for 30 times at the temperature of-20 DEG C to 45 DEG C, can reach the explosive speed of 3200 m / s or above within the validity period and reach the standard of No. 2 rock emulsion explosives, and is particularly suitable for high-temperature production and storage in summer and explosion in low-temperature and repeated high and low-temperature storageand use environments in winter.

The present invention provides a human explosive power level gene detection kit, which comprises a box and reagents separately stored inside the box, wherein the reagents comprise (1) a PCR reaction primer group for seven gene SNP polymorphic loci, (2) a PCR amplification reagent, and (3) an agarose gel electrophoresis analysis reagent. According to the present invention, with the PCR primer design, the multiple PCR amplification reactions can be simultaneously performed on the same PCR instrument to detect the related gene of the subject and achieve the high efficiency and the specificity of the detection, the gene basis of the explosive power level is obtained through analysis, whether the individual is fit to engage in the explosive power-related sports is evaluated, and the scientific basis for selecting the sport is provided for professional sport organizations and coaches; and for the public body building training, the potential sport ability assessment is provided for the individual, the individual can well select the sport suitable for the own physical condition, such that the own disadvantages can be efficiently and rationally provided, and the training purpose is achieved.

The invention discloses a crank-connecting rod mechanism for an engine of a miniature cross-country motorcycle. The crank-connecting rod mechanism comprises a left crank, a right crank, a crank pin and a connecting rod, wherein the big head end of the connecting rod is positioned between the left crank and the right crank; the big head end of the connecting rod, the left crank and the right crank are connected with each other through the crank pin; the axial lines of the left crank and the right crank are in the same line and are parallel to the axial line of the crank pin; the distance between the axial lines of the left crank and the right crank and the axial line of the crank pin is 28.5 to 30.5 mm; the diameter of the shaft part of the right crank is 95 to 97 mm; the axial length of the right crank is 64 to 66 mm; and the distance between the centre of an installing hole at the big head end of the connecting rod and the centre of the installing hole at the small head end of the connecting rod is 94.3 to 96.3 mm. By changing a plurality of key parameters of the crank-connecting rod mechanism, the crank-connecting rod mechanism for the engine of the miniature cross-country motorcycle meets the functional requirements on high raising speed, strong explosive power, high torque, high crank rotating speed of the engine of the miniature cross-country motorcycle, and has the characteristics of ingenious conception, simple structure, easy implementation and the like.

The invention discloses a measurement device and characterization method for an explosive temperature power reduction degree. The device comprises explosive, an underwater explosion tank, a pressure sensor and an oscilloscope, wherein the explosive is arranged in the underwater explosion tank after being heated in water bath, and the pressure sensor is arranged in the underwater explosion tank, and is connected with the oscilloscope. The water bath is generated in a water-bath constant-temperature tank, and the water-bath constant-temperature tank can adjust a temperature of the water bath. In measurement, the explosive heated by water bath is ignited, a pressure time travel curve can be measured through the pressure sensor and the oscilloscope, the weight of the explosive which is not heated by water bath is changed to obtain a corresponding first bubble pulsation period, a temperature power reduction degree calculation formula can be derived according to the first bubble pulsation period, and the temperature power reduction degree of the explosive heated by water bath can be calculated. In actual application, the device can quantitatively characterize the effect degree of the water bath heating time to the explosive power attenuation and further can guide an explosion scheme design in a high-temperature fire area.

The invention discloses a high-frequency magnetic nuclear resonance meridian physiotherapy machine which comprises a power supply, a drive motor and a core component, wherein the drive motor and the core component are arranged in a shell; the core component comprises a core seat arranged in a core protecting box; a core balance bar is respectively arranged at two ends of the core seat; the core seat is provided with a driving magnetic moxibustion shaft and at least one driven magnetic moxibustion shaft; the driving magnetic moxibustion shaft and the driven magnetic moxibustion shaft respectively consist of a permanent magnetic material, a carbon steel shaft core and a non-magnetic conductive auxiliary material; the magnetic fields of the driving magnetic moxibustion shaft and the driven magnetic moxibustion shaft are an S pole on one side and an N pole on the other side in distribution; the shaft head of the driving magnetic moxibustion shaft passes through the core seat; the driving magnetic moxibustion shaft is connected with the output shaft of the drive motor; the power supply is a variable-voltage DC power supply; and a circuit board and a liquid crystal display circuit board are arranged in the shell. The high-frequency magnetic nuclear resonance meridian physiotherapy machine can penetrate into the acupuncture points of a human body without damage to skins by replacing a filiform needle for traditional Chinese medical acupuncture and moxibustion with a high-frequency magnetic field line to form resonance in the human body, generate strong explosive power and quickly activate hindered channels and points, thereby carrying out physiotherapy on the meridians of the human body.

The invention discloses a battery pack and an electric automobile provided with the battery pack. The battery pack comprises a battery box, a battery closed inside the battery box, and a water coolingsystem used for absorbing the heat of the battery; the water cooling system comprises a circulating water channel filled with cooling water; and the water cooling system also comprises a water inlethole, a water diversion pipe and a waterproof breathable film, wherein the water inlet hole is formed in the box wall of the battery box in a cut-through manner, one end of the water diversion pipe isconnected with the water inlet hole in a sealing manner and the other end of the water division pipe is connected with the circulating water channel of the water cooling system in the sealing manner,and the waterproof breathable film is used for sealing and blocking a water channel formed by the water division pipe and the water inlet hole together. When thermal runaway occurs on the battery inside the battery pack, the internal voltage of the battery pack can be released quickly, and the explosive power is reduced; and simultaneously, the heat inside the battery pack is absorbed rapidly, sothat thermal diffusion is reduced.

The invention discloses a human body lower limb explosive power evaluation method and device. The method comprises the steps of acquiring time sequence data of force applied to a flat plate by a subject in a longitudinal jump process on an evaluation hardware device, specifically, the longitudinal jump comprises static squatting jump, downward squatting jump and jump depth; according to the time sequence data, analyzing and confirming a mapping relationship between the pressure and the time of each stage, specifically, each stage comprises a squatting stage, a force exerting stage, a jumping stage, a flying stage and a landing stage; obtaining a plurality of evaluation parameters according to the mapping relationship between the pressure and the time of each stage; and based on the plurality of evaluation parameters, calculating muscle explosive power level parameters of the subject. By applying the method, the level parameters of the lower limb explosive power can be accurately evaluated, improvement can be guided and scientific training means and methods can be selected according to characteristics of different sports events on the bounce ability in combination with the evaluation result of the lower limb muscle explosive power level of athletes, the training of the lower limb bounce ability is enhanced, and the lower limb explosive power is further improved.

The invention discloses an arm muscle explosive power rehabilitation training device. The arm muscle explosive power rehabilitation training device comprises a backrest and a strong spring, wherein a backing pillow is arranged in the middle of the top of the backrest, and sliding grooves are formed in two sides of the backrest. For the arm muscle explosive power rehabilitation training device, first, an arm fixing block is fixed through a telescopic belt, a wrist fixing belt on a first connecting arm carries out secondary fixing on the arm, a flexible cushioning belt for protecting the arm is connected between the first connecting arm and a second connecting arm, so that the arm can be fixed, meanwhile, during use, the arm is protected from being injured by the strong spring, second, a hand-muscle developer is arranged at one side of the first connecting arm, therefore, a user can exercise the explosive power of the arm muscle and also can train the strength of the hand, so that the training effect is the optimal, finally, the slider slides in the sliding groove to drive the second connecting arm to slide, therefore, the user can slide the second connecting arm to the needed position according to the self demand, and thus convenience is provided for the user.

The invention discloses a numerical control damping source control method. The method includes the steps that a resistance parameter selecting instruction input by a user is received; target resistance curve information is determined with the resistance parameter selecting instruction; according to the target resistance curve information, a servo motor is controlled to output different torques under different rotor angles; the torque output under the same rotor angle is increased along with increase of the resistance parameter. In this way, the corresponding resistance curve is determined according to the resistance parameter selected by the user, the servo motor is controlled to output different torques at different positions through the resistance curve so that various loads can be simulated, the torques change along with the change of position and speed, and the problems that in existing electric control is large in inertia, movement speed cannot change too fast, and the explosive power training effect is bad. The invention further discloses a numerical control damping source control device and system and fitness equipment, and the technical effects can be achieved through the numerical control damping source control device and system and the fitness equipment.

The invention relates to an SHPB (split Hopkinson pressure bar) explosive power source device which can accurately control impact speed / energy. The SHPB explosive power source device comprises a cylinder body, a cylinder cap, conducting rods and wires, and is characterized in that the cylinder cap is fixed on the cylinder body through bolts; a bullet launch bar is arranged at the center of the cylinder cap and is integrally designed with the cylinder cap; two conical through holes are symmetrically formed in two sides of the bullet launch bar on the cylinder cap, and rubber plugs are assembled in the conical through holes; the conducting rods are inserted on the rubber plugs; one end, located on the outer side of the cylinder body, of each conducting rod is connected with a power control system through the corresponding wire, and the other ends, located in the cylinder body, of the conducting rods are connected to an explosion fuse wire. During working, strong current is introduced to the explosion fuse wire through the wires to fuse and sublime the explosion fuse wire, high-pressure gas is generated to push a bullet to be ejected at a high speed, and explosion energy can be accurate by controlling parameters such as electric current, explosion fuse wire material and length and the like, so that the bullet impact speed is accurately controlled.