3328 results about "Dead weight" patented technology

A device for the metered administration of a fluid drug. The device has a container having a piston for administering the fluid drug through an outlet of the container, a catheter connected to the outlet of the container, the catheter having a front end facing away from the outlet and being connected to an injection needle, and a valve positioned between the outlet and the injection needle in a flow cross section of the fluid drug, the valve having an inlet end adjacent the outlet and an outlet end adjacent the injection needle, wherein the valve permits flow of the fluid drug through the valve from the outlet to the injection needle when a fluid pressure exerted on the inlet end of the valve exceeds a pressure on the inlet end caused by the dead weight of the fluid drug.

The invention discloses a double-arm robot modularized joint with a hollow structure, belonging to the field of industrial robots. A mechanical arm is composed of seven similar modularized joints. The joint comprises an input device and an output device, wherein the input device comprises a hollow motor rotor, a rotor axial positioning ring, a third motor bearing, a hollow brake rotor, an O-shaped sealing ring, a motor stator mounting flange, a main transmission shaft, a motor rotor, a second motor bearing, a bearing pressing cover and a harmonic reducer wave generator; the output device comprises a joint output flange, a first output bearing, a mounting flange, an absolute value encoder rotor, a sealing bearing and a harmonic reducer steel wheel; the input device is connected with the output device by the mounting flange. The double-arm robot modularized joint has the advantages that the problems of robot products with more varieties, small batches and complicated structures can be solved; the load dead-weight ratio of the joint can be increased on the basis of meeting the conditions, and the rotation precision of the joint is improved.

The invention belongs to the pneumatic technology field, and relates to pneumatic artificial muscle. The artificial muscle consists of an outer mesh grid, an inner expansion tube, a sealing component and a sealing component with air vents. The outer mesh grid is aligned with the inner expansion tube at two ends and sleeved on the inner expansion tube, with the original length thereof a little longer than that of the inner expansion tube; and one end of the outer mesh grid is inserted into the sealing component, and the other end thereof is inserted into the sealing component with air vents. The inner expansion tube of the pneumatic artificial muscle is inflated with air with a certain pressure, so that the inner expansion deforms to cause the outer mesh grid to expand in the radial direction, so as to enable the pneumatic artificial muscle to expand in the radial direction, contract in the axial direction and output certain tensile force. The pneumatic artificial muscle has the characteristics of compact structure, simple manufacture, low price, high flexibility, high ratio of output force to dead weight, effective energy conservation, automatic buffer, pollution resistance, etc., and can be widely applied to the fields of robots, auxiliary medical apparatus and instruments, aviation, defense industry, etc.

A vertical full-magnetic suspension wind-driven generator consists of a magnetic-suspension loading platform, a driving shaft, a generator, blades and a radial magnetic-suspension bearing. The magnetic-suspension loading platform is used for carrying the dead weight of the generator rotor, the driving shaft and the blades. The radial magnetic-suspension bearing is used, so the whole rotating part of the wind-driven magneto generator realize the magnetic suspension completely.

The invention relates to a self-help baggage consigning system and a control method thereof. The system comprises a baggage handling device and an operation cabinet, wherein the baggage handling device comprises a baggage detection box body as well as a device master control system, a conveyer control system, a dynamic baggage size consigning system, an automatic baggage dead-weight acquiring system and an automatic code scanning and identifying system which are arranged on the baggage detection box body or outside the baggage detection box body; and the operation cabinet is arranged at one side of the baggage handling device and comprises a shell, a cabinet master control system, a boarding check printer, a baggage label printer, an identity card identifying scanner and a display touch screen. Due to The self-help baggage consigning system and the control method thereof, a high-efficiency and self-help baggage consigning service mode is provided, which not only can simplify the check-in procedures of passengers, but also can reduce the waiting time of the passengers, the labor intensity of staff and the quantity of the staff so as to improve the operating efficiency of the airport and reduce the operating cost.

An improved golf club fitting system for fitting a set of golf clubs to a player includes the steps of measuring a player's hand grip strength and selecting a representative golf club having a dead weight directly proportional to the player's grip strength. The club length and the swing weight of the representative golf club are then determined by standard testing procedures commonly used in the golf club industry. A balance index (BI) for the representative golf club is then computed by dividing the dead weight (DW) by the swing weight (SW) (DW / SW=BI) and the balance index (BI) is compared to the dead weight to determine generally corresponding values for the remaining other golf clubs in the set such that the system user can match different irons and woods to the representative golf club thereby creating an ideal matched set of golf clubs for the player.

The invention discloses a three-stage integrated treatment system for purification and regeneration of activated coke flue gas, comprising a denitrification reaction tower, a desulfurization reaction tower and an activated coke regeneration tower. The denitrification reaction tower, the desulfurization reaction tower and the activated coke regeneration tower are vertically connected from top to bottom sequentially. The three-stage integrated treatment system for purification and regeneration of activated coke flue gas can finish the integrated process of flue gas purification and activated coke regeneration and sufficiently make a compromise on the secondary utilization of separated substances in the treatment process by artfully combining the denitrification reaction tower, the desulfurization reaction tower and the activated coke regeneration tower, and also feed materials by the dead weight of activated coke. The invention has the advantages of simple equipment, small occupied area and low construction cost. In addition, the invention also discloses a three-stage integrated treatment method for purification and regeneration of activated coke flue gas.

The invention relates to a cable-driven mechanical arm for assisting disabled / elderly people. The mechanical arm comprises a convolution joint, an up-and-down rotation joint, a horizontal rotation joint, a first joint connecting plate, a sliding block, a guide track, a base driving box, driving motors and a cable driving system. The driving motor of each rotation joint is mounted in the base driving box, the cable driving system is utilized for transferring the power of the driving motors to all the rotation joints, and then the driving of the rotation joints is realized. The cable-driven mechanical arm disclosed by the invention solves the problem that a cable can only be stretched but not be compressed during the cable driving process, and the cable driving system is utilized for transferring the power to all the joints, so that the mechanical structures at the joints are simplified, the dead weight of the mechanical arm is greatly reduced, and the load-dead weight ratio and dynamic performance of the mechanical arm are improved. The mechanical arm has the advantages of simple structure, high safety performance and large stroke range, and is particularly suitable for being mounted on wheelchairs, care beds and other equipment for assisting disabled / elderly people.

The invention discloses a formula of a ceramic aggregate aerated concrete brick and a method for making the concrete brick. The compositions in portion by weight of the concrete brick are: 12 to 26 portions of cement, 26 to 46 portions of fly ash, 16 to 28 portions of ceramic aggregate, 2 to 6 portions of slag, 2 to 6 portions of cinder, 16 to 26 portions of water and 2 portions of addition agent, wherein the concrete matters in percentage by weight of the addition agent are: 10 to 18 percent of aluminum powder (a foaming agent), 20 to 45 percent of polycarboxylate (a water reducing agent), 15 to 35 percent of 1122 fly ash excitant and 20 to 50 percent of coagulant hardening accelerator in which calcium chloride and sodium sulfate compounds respectively occupies 50 percent. The concrete steps for making the ceramic aggregate aerated concrete brick are as follows: raw materials are weighed; the weighed raw materials are placed in a stirring machine to carry out stirring and mixing in advance; an addition agent is added in the stirring machine to carry out full stirring; a brick die is prepared, and stirred raw materials are cast in the brick die; initial set and forming are carried out; stripping is carried out; a water-proofing agent is sprinkled on a stripped brick; and natural curing is carried out. Moreover, the obtained brick has light dead weight, low density, high strength, low water absorption rate and excellent sound insulation performance and heat-shielding performance.

An electronic candle (10) which simulates a flickering flame is provided. The candle (10) includes a hollow shell (12), a light-emitting element (18) such as an LED and a cap member (20) having the contour of a burning flame covering the light-emitting element (18). An electromagnet is provided to swing the light-emitting element (18). The electromagnet is mounted on a bracket (26) and receives an alternating current. A holding member (40) has a dead weight (52) at one end and the light-emitting element (18) at the other end. A permanent magnet (54) is attached to the bottom of the dead weight (52) such that when an alternating current is applied to the electromagnet it creates a magnetic field for acting on the permanent magnet (54) causing the holding member (40) to swing along an axial direction of the bracket (26). The electromagnet, bracket, dead weight, holding member and permanent magnet are concealed inside the shell (12) with a neck (46) of the holding member (40) to which the light-emitting element is affixed extending out the top end (16) of the shell (12).

A catalyst dumping device (10) for unloading a catalyst (50) inside a reactor (1), in which smashed used catalyst is thrown into a dumping pipe (11) formed of a plurality of pipe member (12) provided to the reactor (1) to unload to outside of the reactor (1) by fall by dead weight. Accordingly, the catalyst can be unloaded only by throwing the catalyst into the dumping pipe (11), thereby improving work efficiency. Furthermore, no special apparatus such as a vacuum apparatus is unnecessary, thereby reducing cost for the special apparatus.

A dynamic compaction soft foundation reinforcing method by combing layered dead weight and pre-pressing drain concretion includes: filling a water-isolation cofferdam; a water collecting well is arranged in the middle of the cofferdam; a sand layer of 0.5m to 0.8m is filled by hydraulically filled or manually filled on the original water-drained ground; a horizontal drain pipe is embedded in the sand layer to carry out first earth hydraulic filling; a drain pump is arranged in the water collecting well to continuously drain water; when the thickness of hydraulic filling reaches the designed elevation of the first layer, the hydraulic filling is stopped; when the surface of the hydraulic filling earth forms a hard shell layer with a thickness of 30m to 40m under the actions of vaporizing and dead weight drain, the hydraulic filling to a second layer and a third layer are carried out according to the steps; even a required hydraulic filling height is designed; finally hill-skill soil or mixed backfill soil and sandy soil are back filled on the layers; dynamic compaction is carried out after leveling. The invention has the technical economic indexes of fast speed, saving investment, small settlement after construction and high surface layer bearing capacity, etc., and has remarkable technical advantages on lower ground elevation and the projects of polder reclamation by hydraulically fill the soft soil like silt.

The invention discloses a force feedback interactive device for automatically regulating the balance of a dead weight, which is formed by a base mechanism, a shoulder mechanism, a big arm mechanism, a forearm mechanism, a wrist mechanism, an end effector mechanism, an automatic regulating and balancing mechanism, four direct current motors, four photoelectric encoders, three high-precision angular potentiometers and the like. In the invention, the direct current motors and a linear speed reduction mechanism are matched to provide three freedom degree force feedbacks and six motion freedom degrees of the three freedom degree force feedbacks by three photoelectric encoders and the three angular potentiometers. For the automatic regulating and balancing mechanism, one direct current motor is adopted to drive and control a balancing sliding block to automatically carry out dead weight compensation on the arm mechanisms of the equipment in real time by a speed reduction device, so that the manual fatigue is effectively reduced. The mechanism has compact design, large working space range, high rigidity and large range of a feedback force.

The invention discloses a net-weight type standard power source device which can load and unload weight independently. The invention overcomes the problems of complicated structure, low efficiency, difficult automation and difficult loading and unloading of the weight. The device comprises a stander (26), a suspension(32), a group of weights, and a group of weight electromotion mechanisms (10), wherein, at least two sets of weight electromotion mechanisms (10) corresponding to each weight (12) are distributed evenly and arranged on the upright post of the standers around the weight; when not in working, a sliding block (18) of the weight electromotion mechanisms (10) is contacted with a weight (12). A first number elastic part ( 17) and a elastic part (27) are respectively arranged between the sliding block (18) and the weight (12), and between a pallet (17) and a snap ring component (28); the center position of a soleplate is provided with a anti-oscillating device (13); the lower end of a steeve (7) is inserted between two second rolling bearings (29) of the anti-oscillating device (13) for contacting with or separating from the two second rolling bearings (29).

The invention relates to a zero-force control method and system for a robot. The zero-force control method comprises the following steps: S1, a robot kinetic model is built on the basis of inertia force, centrifugal force, coriolis force, viscous friction force, static friction force and gravity; S2, external force moments of all the joints of the robot are calculated on the basis of the robot kinetic model and feedback data; S3, a speed command is calculated according to the external force moments calculated in the step 2; and S4, a position command is calculated according to the speed command and position feedback. Through the building of the kinetic model, the external force moments of all the joints can be directly calculated, without the assistance of a power-assisted sensor or a torque sensor, so that the cost and the complexity of the system are reduced; by the adoption of a position command control manner instead of a direct torque control manner, the design difficulty in the safety and the stability of the system is reduced; and in addition, since inertia force is considered when the external force moments are calculated, the zero-force control method and system can be suitable for robots with greater dead weight.

The invention relates to a building method of a filled wall body for gob-side entry retaining of a large-inclination coal seam, which comprises the following steps: erecting dense individual props on the entry retaining side on the rear part of a heading stope to retain roadway space on the rear part of the heading stope, erecting anti-tilting side supports along the dense individual props, laying reinforcing fabric and high-strength fiber cloth on the side of the dense individual props close to the gob, and building a structure used for intercepting waste rocks in the gob; and when the dropped waste rocks in the gob automatically slide along the large-inclination footwall to the waste rock blocking structure formed by the reinforcing fabric and the high-strength fiber cloth under the effect of the dead weight and pile up to a certain degree, grouting and cementing part of the dropped waste rocks near the entry retaining side for consolidation, thereby forming the filled wall body, and repeating the steps in sequence along with the advancement of the heading stope until the whole filled wall body for gob-side entry retaining. The invention has the advantages of simple method and high working efficiency, the filled wall body built in the method is of high strength and is also economical and practical, and the method is suitable for the building of the filled wall body for gob-side entry retaining under the high-inclination condition.

The invention discloses a steel-super high performance concrete composite beam based on a ribbed plate type bridge deck and a construction method. The construction method includes the following steps that step1, steel beams are machined, manufactured and installed; step2, shearing force connecting parts are welded; step3, the super high performance concrete bridge deck is constructed; step4, a guardrail or an anti-collision wall is constructed; step5, bridge deck pavement is constructed, wherein the super high performance concrete bridge deck and the steel beams are fixed through the shearing force connecting parts, the cross section or / and the longitudinal section of the super high performance concrete bridge deck is / are of a ribbed plate structure, and pre-stressed reinforcements can be arranged on a longitudinal rib region or / and a transverse rib region. The composite beam is reasonable in stress, high in strength and capable of substantially reducing the structure dead weight, effectively avoiding defects at a hogging moment region of a composite continuous beam and bringing tensile strength, compressive strength and high durability of super high performance concrete into full play; the composite beam has the advantages of being small in building height, high in rigidity, small in dead weight, good in durability, crack resistance and fatigue resistance and the like, and has great practical value and good economic benefits.

The invention belongs to the field of wind power generation, in particular to a damping composite type variable rigidity vibration attenuating support for a gearbox of a wind powered generator. The support mainly comprises an upper yoke (1), a lower yoke (3), four hollow vertical columns (2), an upper elastic body (4), a lower elastic body (4), an upper base (5) and a lower base (5), wherein the upper yoke (1), the lower yoke (3) and the four hollow vertical columns (2) form a combined type main frame of the vibration attenuating support; a viscoelastic damping vibration attenuating layer (11) is compounded on the main frame; after being respectively combined with the upper base (5) and the lower base (5), the upper elastic body (4) and the lower elastic body (4) are respectively fixed on the upper yoke (1) and the lower yoke (3); the vibration attenuating support is connected to the main machine frame (6), and a gearbox torque arm (9) is arranged between the upper elastic body and the lower elastic body. The invention has the characteristics of light dead weight and low cost, the rigidity of the vibration attenuating support can form a non-linear change along with the increase of loads, and the vibration attenuating support has damping attenuation capability and further reduces the transfer of the vibration and the noise of a system to a lower foundation.

The invention discloses a pull pressure sensor which is a sensor used for pull pressure measurement of an aircraft elevator control system. The sensor has the characteristics of two-way force measurement, long range, high precision, continuous application force value points and the like. Aiming at solving the problem that weight calibration cannot realize the continuous loading of a force value in the traditional method of dead weight type (weight) calibration, a pull pressure calibration device is developed in the invention based on a hydraulic sensor technology and comprises a one-way quantitative hydraulic pump, a bidirectional hydraulic control module, a one-way oil-return device, a special calibration clamp, a calibration force sensor and a standard force value display. The device is developed based on a measurement principle of a back-to-back comparative method, intensively solves three key problems on two-way continuous force source, two-way large-range loading force (100,000N) and portability (26cm*21cm*82cm) of the whole set of device. The device can also be used for the calibration of the pull pressure sensors with the precision lower than 0.05 percent in other fields.

The invention belongs to the field of sheet metal and welding processing, and relates to an integral forming method for a thin-walled titanium alloy part with an irregularly-shaped curved surface. The integral forming method aims at overcoming the defects that the shape of parts processed through the prior art is limited or the procedure and the cost are higher, and effectively ensuring the precision forming of a thin-walled component with an irregular shape. The integral forming method comprises the steps as follows: a parting surface is determined; blanking is carried out; in the preforming step, a plate is bent from a flat into a circular arc through a bending die or a bending machine; welding is carried out; in the hot shaping step, a hot shaping die is put in the inner part of a part that is processed through the assembly welding under the ordinary temperature, and the part is supported tightly due to the dead weight of the die and is heated in a hot shaping machine; and in addition, a pressing machine applies pressure to the hot shaping die when the part is heated until material is softened, so as to enable the part to reach the needed size. The integral forming method comprehensively utilizes the advantages of various processes, can obtain the large-sized thin-walled titanium alloy part with the irregularly-shaped curved surface through only two weld joints, and achieves higher surface quality of the part.

The invention relates to a high-integrality robot joint. The high-integrality robot joint comprises a mechanical system, a joint electrical system and a sensor system, wherein the mechanical system, the joint electrical system and the sensor system are integrated in the joint; the mechanical system comprises a power-off brake; the joint adopts a large hollow shaft structure, and wires in the joint are all arranged in hollow inside space. The high-integrality robot joint has the benefits as follows: the high-integrality robot joint has the characteristics of small size, small dead weight, high load capacity and high integrality; output performance requirements for a motor are reduced while output torque is increased through a large reduction ratio of a harmonic reducer; meanwhile, slide control of the motor is realized through a motor encoder, the high-precision characteristic of output of the joint is guaranteed through an absolute joint encoder, position keeping of a robot is realized through the power-off brake under the power failure condition, and safety of the robot during movement is improved.

The invention discloses a Ti-based powder preparing device and a Ti-based powder preparing method. The device comprises a vacuum chamber, a magnetic suspension melting furnace, an atomization power processing chamber and a screening system. During working, when the magnetic suspension melting furnace is energized with high frequency alternating current, a high frequency alternating magnetic field can be produced in space around a coil, and the high frequency alternating magnetic field causes induction vortex in furnace charge. The induction vortex and the external alternating magnetic field interact with each other to produce suspension force for the furnace charge, and the suspension force is balanced with the dead weight of the furnace charge so as to enable the furnace charge to suspend; meanwhile, a vortex circuit generates a great deal of heat to melt the furnace charge, and the molten mass is subjected to deslagging, degassing and purification under the fierce function of electromagnetic stirring. The purified molten mass can fall into a gas atomization chamber by virtue of controlling the magnetic field; under the functions of a supersonic speed high-pressure argon atomizer and a cooling device, the molten mass is atomized into spherical Ti-based powder with high degree of sphericity, oxygen content of less than 1800 ppm and nitrogen content of less than 300 ppm.

A transport and load cart in the form of a kick scooter is compact, has a low dead weight and is designed with dimensions that are suitable for transport by train or automobile, and which nonetheless ensures safe transport of bulky and heavy goods together with a person, while improving the handling and reducing the expenditure of force. The longer side of the loading platform is disposed transversely to the travel direction and in a rearwardly inclined and / or displaceable manner relative thereto, and the receiving compartment has a front-side slot for the rechargeable battery.

The invention provides a dead weight drop amplitude compensating hydraulic system, a crane and a control system thereof. The hydraulic system comprises a variable amplitude oil cylinder, an oil tank, an electric proportional variable amplitude balancing valve, an electronic control handle and a controller. The variable amplitude oil cylinder comprises a rod cavity and a rodless cavity; the electric proportional variable amplitude balancing valve comprises a working hydraulic fluid port and a control port; the rod cavity is communicated with the oil tank; and the rodless cavity is communicated with the working hydraulic fluid port. A pressure detecting unit is used for detecting the pressure of the rodless cavity, and an angle detecting unit is used for detecting the pitching angle of an elevator boom. The controller is connected with the control end of the electric control handle and the control end of the electric proportional variable amplitude balancing valve and outputs control current to the electric proportional variable amplitude balancing valve, and the control current is determined according to the opening of the electric control handle, the pressure of the rodless cavity and the pitching angle of the elevator boom. No pressure exists in the rod cavity of the variable amplitude oil cylinder, weights depend on dead weight to drop, the drop speed is only relevant to the input current of the electric proportional variable amplitude balancing valve, and the controller adjusts the input current of the electric proportional variable amplitude balancing valve in time, so that the weights drop at a uniform speed in the vertical direction.

The invention discloses a steel truss web combined PC beam, comprising a reinforced concrete top plate and a reinforce concrete base plate as well as at least two lines of base steels; wherein the reinforced concrete top plate and / or reinforced concrete base plate are / is provided with a tensioned prestressing reinforcement, the base steels are discontinuously arranged along the length direction of the beam and are anchored on the reinforced concrete base plate, one end of steel truss web is fixedly connected with the base steel, the other end thereof is fixedly connected with a top steel, the top steel is formed with at least two lines of steel truss webs which are discontinuously arranged along the length direction of the beam and are anchored on the reinforce concrete top plate, each line of steel truss web is fixedly connected with base steel and top steel, so as to be in a shape that a plurality of continuous 'V' shapes are combined. The invention also discloses a construction method of the steel truss web combined PC beam. The invention makes the best of the advantages and properties of reinforced concrete and steel, dead weight is lighter, rigidity of web is high, steel is saved to the utmost extent, construction process is simple, footboard framework support is saved, and appearance is beautiful, thus having obvious economic benefit and wide application in the field of bridge construction.

The invention discloses a lightweight bottom layer plastering gypsum which is characterized by comprising the following components in percentage by weight: 20-70% of building gypsum, 20-70% of furnace bottom ash serving as a lightweight aggregate, 0-20% of ordinary portland cement, 0-20% of granulated blast furnace slag powder, 0-30% of fly ash and 0-30% of an additive, wherein the additive comprises the following components in percentage by weight: 0-0.6% of cellulose ether, 0-0.3% of a retarder, 0-0.3% of a water reducing agent, 0-0.15% of starch ether, 0-2% of re-dispersible latex powder, 0-0.5% of polypropylene fiber and 0-2% of a water repellent. The invention provides an environment-friendly lightweight bottom layer plastering gypsum mortar which is low in density, good in heat retaining property and capable of automatically adjusting temperature and humidity. The lightweight bottom layer plastering gypsum can effectively reduce the mortar density and building dead weight and has good sound insulation and noise reduction effects.

The invention discloses an offshore wind power unit foundation using a prestressed concrete cylindrical structure, consisting of a cylindrical foundation, prestressed cross beams and a connecting stepped drum, wherein the cylindrical foundation is in a reinforced steel bar concrete cylindrical structure and internally provided with clapboards for separating a bin; the prestressed cross beams are arranged on a sealing coping of the cylindrical foundation and radially and evenly distributed; the connecting stepped drum is in a prestressed concrete cylindrical structure; the lower end of the connecting stepped drum, the reinforced steel bar concrete cylindrical foundation and the prestressed cross beams are poured into a whole; metal rings are arranged on the joint parts; and a flange plate is arranged at the upper end of the connecting stepped drum and fixedly connected with the stepped drum of an electric generating set. The invention has the advantages that: the offshore wind power unit foundation has simple structure, convenient construction, small construction quantity, low construction cost and favorable load-carrying capability, and can be prefabricated on land and reach the construction position by traction, towing and floating so as to reduce the transportation cost; and with the prestressed concrete structure, the invention can effectively improve the structural strength, reduce the dead weight of the foundation, save materials and improve the durability and the corrosion resistance of the structure.

A gear rack type inertial container with a variable inertial coefficient is characterized in that a guide groove is arranged on a flywheel of the inertial container, a mass block capable of freely and radially moving in the guide groove is nested in the guide groove, and a magnetic sleeve ring is arranged at the axis of the flywheel and can suck the mass block to a position close to the axis of the flywheel when being static. When a pair of external forces oppositely acts at two endpoints of the inertial container, a rack indirectly drives the flywheel fixed onto a box to rotate, and centrifugal force enables the mass block to radially move, so that the inertial coefficient changes along with the movement state, impact generated in instantaneous action of high load is relieved, the dead weight of the inertial container can be reduced, and the inertial container is simple and practicable in structure.

Disclosed is an oscillating system arranged so that a gravity center of a movable member and a torsional axis of a resilient support are easily registered with each other to prevent deformation of the movable member due to its dead weight or deviation of deformation from symmetrical deformation, wherein the oscillating system includes a substrate 301, a movable member 302 with hard magnetic members 310 and 311, resilient supports 304 and 305 for supporting the movable member for torsional vibration about a torsional axis 312 with respect to the substrate, and a magnetic field producing device for driving the movable member relative to the substrate, wherein the movable member 302 has recesses 306 and 307, and wherein the hard magnetic members are fixed while their end portions are aligned with end faces 308 and 309 corresponding to the recesses.

A method for confirming load of multi-arch tunnel includes confirming load mode of deep buried multi-arch tunnel based on suppose of double caving arch, confirming deep-shallow buried boundary of multi-arch tunnel according to deep-shallow burying boundary dividing manner in JTGD70-2004 specification for single hole tunnel and confirming load mode of shallow buried multi-arch tunnel by considering dead weight of triangle block at wall top in multi-arch tunnel.