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1099 results about "Force direction" patented technology

Dynamic characteristic parameter test device and method of sliding guide rail junction surface

The invention relates to a dynamic characteristic parameter test device of a sliding guide rail junction surface, which can be simplified into a single degree of freedom system. The device comprises a base, an installation platform, a fixed guide rail, a wedge-shaped block, an inlaid strip, a sliding block, a plurality of piezoelectric type acceleration sensors, a vibration exciter, an elastic rope, an impedance head, a stand, a normal force applying bolt, a rubber ring, a charge amplifier, a data acquisition unit, a power amplifier and an electronic computer. Compared with the prior art, thedynamic characteristic parameter test device has the advantages that: the structure is compact, the test principle is distinct, dynamic characteristic parameters of the junction surface under different load states can be measured by adjusting the pretightening force of a normal force applying bolt, the vibration exciting force direction passes through the gravity of the sliding block during measurement so that vibration signals of the sliding block and the base can be measured simultaneously, the influence of the vibration signals of the base is eliminated when a frequency response function of a system is calculated, and the characteristics of high efficiency, high stability and high precision are achieved.
Owner:NANJING UNIV OF SCI & TECH

Muscle training apparatus and method

The invention is directed to a muscle trainer and method for exercising a weaker of two opposing muscle groups of a person swinging an implement, such as a golf club, wherein, if the two opposing muscle groups were of appropriate strength, the two muscle groups would desirably apply forces in opposite directions to the implement to assist in maintaining the implement in an ideal club shaft plane. The contemplated muscle trainer of this invention includes a body having a grip surface located thereon, and a force generator positioned at a prescribed location on the body, which is spaced from the grip surface, for urging the prescribed location of the body in a direction away from a force direction which the weaker muscle would normally apply to the implement in the swinging thereof by the person. The invention further contemplates a method exercising at least a dominated muscle of two opposing muscles typically used by the golfer when attempting to swing a golf club in an ideal club shaft plane, where the dominated muscle applies a first swing force to the golf club in a non-dominating swing force direction, and a dominating muscle applies a second swing force in a dominating swing force direction to the golf club which is opposite the direction, and exceeds the force, of the non-dominating swing force.
Owner:PRIESTER W BRADFORD

Testing device for bearing dynamic characteristic parameters

InactiveCN103105296AEasy to Accurately AcquireReduce complexityMachine bearings testingData acquisitionEngineering
The invention discloses a testing device for bearing dynamic characteristic parameters. The testing device for the bearing dynamic characteristic parameters is composed of an instrument and equipment system, and a testing device. The instrument and equipment system comprises a data collector, a signal conditioning instrument, a power amplifier, a digital indicator, a vibration exciter, an impedance head, a piezoelectricity accelerating speed sensor, and an electronic computer. The testing device comprises an iron cast platform, a mounting base plate, a bearing seat, a bearing sleeve, a bearing, a mandrel, a shaft end nut, a pre-tightening nut, a rubber spring, an axial loading device, a radial loading device, a pre-tightening device, a bracket, an elastic rope and the like. The testing device for the bearing dynamic characteristic parameters is compact in structure and clear in test principle, the loading devices are infinitely adjustable, and the testing devices can measure the bearing dynamic characteristic parameters under load condition of different axial force, radial force, pre-loading force and the like. When measurement is conducted, vibration force direction penetrates through mandrel axis to measure vibration signals of an inner ring and an outer ring of the bearing at same time, affect from vibration signals of the bearing outer ring is eliminated when a displacement frequency response function is calculated, and the testing method is high in efficiency, precision, and stability.
Owner:NANJING UNIV OF SCI & TECH

Fault diagnosis technology for mechanical tower

ActiveCN101545824AMonitoring Vibration DisplacementMastering Vibration DisplacementVibration measurement in solidsVibration testingTorsional vibrationSteady state
The invention relates to fault diagnosis technology for a mechanical tower, which comprises a sensor group comprising a vibration or/and steady-state acceleration detection sensor and a forced direction detection sensor, and a fault information processor for acquiring signals of the sensor group and analyzing and diagnosing the signals of the sensor group. The signals detected by the sensor groupare transmitted to the fault information processor through cables, the hardware of the fault information processor acquires the signals, and then the corresponding software of the fault information processor performs analytical diagnosis and treatment. Because a plurality of groups of acceleration sensors arranged at a specific position for monitoring the dynamic condition of the tower under a running state are adopted, the technology not only can master the vibration displacement born by the tower along the direction of geographical coordinates, but also can effectively monitor various influences brought by torsional vibration caused by environmental factors and change caused by factors such as individual foundation of a tower body and the like. Simultaneously, aiming at the change factors, the fault information processor matched with the acceleration sensors warns in time within a range of ensuring the normal work of the tower. Therefore, the technology provides a technical support for ensuring the using safety of the tower and improving the service life.
Owner:北京唐智科技发展有限公司

Bearing-free switch reluctance motor having axial-direction parallel hybrid structure and control method of motor

The invention discloses bearing-free switch reluctance motor having an axial-direction parallel hybrid structure and a control method of said motor. A motor stator is composed of a reluctance motor stator and a magnetic bearing stator. A rotor is composed of a salient pole rotor and a cylinder rotor. The windings are composed of torque windings and suspension windings. The torque windings are composed of reluctance motor windings and wide-tooth windings and the number of the torque windings is identical to phase number m. The suspension windings are two and are arranged in the radial direction. The magnetic bearing stator is composed of four E-shaped structures and the width of each middle tooth is twice of the rest. According to the invention, suspension current is calculated according to a suspension force direction. Current of the torque windings and switching-on and switching-off angles of a power circuit are controlled separately and rotation speed and torque are controlled in real time. Current of the two suspension windings is controlled separately, suspension forces are regulated in real time and mutual decoupling is realized in rotation and suspension. According to the invention, the quantity of control variables is small; suspension control is simple; and a power converter of a suspension system is low in cost.
Owner:NANJING UNIV OF POSTS & TELECOMM

Joint surface dynamic characteristic parameter testing device of rolling guide rail and testing method thereof

The invention relates to a joint surface dynamic characteristic parameter testing device of a rolling guide rail, which can be simplified to a single-degree-of-freedom system. The joint surface dynamic characteristic parameter testing device comprises a base, a mounting bottom plate, a rolling guide rail, a rolling guide rail slider, a bridge plate, a plurality of piezoelectric acceleration sensors, an exciter, an elastic rope, a rubber ring, a frame, an impedance head, a normal pressing bolt, a charge amplifier, a data collector, a power amplifier and a computer. Compared with the prior art,the joint surface dynamic characteristic parameter testing device has the significant advantages of compact structure and clear testing principle, and can simultaneously measure the joint surface dynamic characteristic parameters in the normal and lateral directions of the rolling guide rail. In addition, the device can measure the joint surface dynamic characteristic parameters under different load states by adjusting the pre-tightening force of the normal pressing bolt; the exciting force direction passes through the gravity center of the bridge plate during the measurement; the vibration signals of the bridge plate and the base can be measured at the same time; and the influences of basic vibration signals can be eliminated during the measurement of the system frequency response function. Therefore, the joint surface dynamic characteristic parameter testing device has the advantages of high efficiency, high stability and high accuracy.
Owner:NANJING UNIV OF SCI & TECH

Method for restraining integrated circuit electricity supply network noise by using decoupling capacitance

The invention discloses a method for restraining integrated circuit electricity supply network transient voltage drop noise by using decoupling capacitance, belonging to the physical design field of superlarge-scale integrated circuit, in particular to the technical category of optimizing network noise of transient power wire earth wires, which is characterized in that the creation points lie in that: (1) proposing a rapid method for estimating a decoupling capacitance demand in a layout stage; proposing a two-dimensional function showing the decoupling capacitance demand in a chip; (3) establishing a supply and demand system for the demand of the decoupling capacitance by utilizing the two-dimensional function to guide that the layout process is performed toward the direction being beneficial for reducing the demand of the decoupling capacity; and (4) proposing a layout algorithm for adding the decoupling capacitance through integrating the above model and the method into a force direction layout. Experiments prove that the method of the invention is effective, and can achieve the layout result that the total amount of the decoupling capacity is decreased by about 35% with the cost that the on-line length is increased by about 0.5%.
Owner:TSINGHUA UNIV

Uniaxial creep testing device and method for frozen earth with temperature gradient

The invention discloses a uniaxial creep testing device and a uniaxial creep testing method for frozen earth with a temperature gradient. The device consists of a pressure cover, a height adjusting cushion block, a convex pedestal, an upper refrigerating plate, a lower refrigerating plate and heat insulation plates, wherein a piston and a vacuumizing channel are arranged at the upper part of the pressure cover in a sliding way, and refrigerating fluid circulating channels and a test lead wire channel are formed in the convex pedestal. In the testing process, the heat insulation plate, the lower refrigerating plate, a sample, the upper refrigerating plate, the heat insulation plate and the pressure cover are sequentially mounted on the convex pedestal, and the space between the convex pedestal and the pressure cover is sealed by an O-shaped seal ring; an adiabatic boundary condition required by the sample is realized by vacuumizing in the pressure cover; the vertical temperature gradient of the sample is realized by regulating cold medium temperatures in the upper refrigerating plate and the lower refrigerating plate; and a creep load required by the sample is realized by regulating the forced direction and size of the piston. According to the uniaxial creep testing device and the uniaxial creep testing method, a unidirectional stress state and the stable adiabatic boundary condition can be provided, and the device and the method are suitable for research of uniaxial creep characteristics of the frozen earth under the conditions of different temperature gradients and scales.
Owner:CHINA UNIV OF MINING & TECH

Ratchet type insulation wire clamping pincers

ActiveCN106229880AGuaranteed linkageReliable relative to action purposeApparatus for overhead lines/cablesEngineeringHigh pressure
The invention belongs to the field of electric power construction tools and in particular relates to ratchet type insulation wire clamping pincers used for high-voltage electrified wire construction. The ratchet type insulation wire clamping pincers comprise a first insulation rod and a second insulation rod. A block type chuck and a hook-like chuck are respectively arranged on top ends of the two insulation rods. The ratchet type insulation wire clamping pincers also comprise a ratchet assembly. The ratchet assembly comprises a gear part, a back support and a locking piece. A ratchet, a handle part and a pawl are arranged in the back support. The locking piece comprises a top block and a press spring. The top block is in the same direction with the unidirectional locking direction of the pawl relative to the unidirectional locking direction of the ratchet. The top block is arranged on a moving route of the handle part or the pawl. A matching surface used for matching the handle part or the pawl is arranged on the top block. The pressing force direction, relative to the matching surface, of the handle part or the pawl is opposite to the elastic restoring force direction of the press spring. The pincers is highly practical and convenient and quick to use; and high safety during working is ensured while high-efficient hot-line work is ensured.
Owner:STATE GRID CORP OF CHINA +1

Method for judging icing instability of tension support of power transmission line

The invention discloses a method for judging the icing instability of a tension support of a power transmission line. The method comprises the following steps that: S1: establishing a pole and tower finite element mechanical analysis fine numerical simulation model; S2: solving and calculating the force direction and the change amount of an insulator string mount point before and after the pole and tower is iced; S2: carrying out finite element numerical calculation; S4: considering an influence of practical uneven icing of two sides of a tension support structure, and making an pole and towerinstability curve; and S5: according to the tension or icing thickness practicality of the mount point under an icing condition, judging a current power transmission line pole and tower instability situation. By use of the method, the real-time tension of the insulator string mount point, finite element situation calculation is adopted to researching the influence of the icing on the pole and tower instability, calculation efficiency can be effectively improved, a finite element calculation result is more reliable, and power grid maintenance personnel can conveniently and directly evaluate the pole and tower stability on the basis of the monitoring situation of the insulator string tension of two sides of the pole and tower.
Owner:EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID

Bionic skin three-dimensional force touch perception device and measuring method thereof

The invention relates to a bionic skin three-dimensional force touch perception device and a measuring method of the bionic skin three-dimensional force touch perception device. The bionic skin three-dimensional force touch perception device comprises a shell, a unit upper layer, a unit basic level and a circuit module. The measuring method comprises the following steps that dynamic data signals are collected to an MCP3208 chip; analog signals are converted into digital signals after entering the MCP 3208 chip; the digital signals enter an EP10K250A chip and are output after being calculated and analyzed; the output signals enter a CY7C68013 chip and then are sent to an upper PC through a USB interface, and LabView virtual instrument software is operated to calculate the forced magnitude and the forced direction of each sensitive unit; eventually the forced situation is stacked to a skin model. The bionic skin three-dimensional force touch perception device and the measuring method of the bionic skin three-dimensional force touch perception device stimulate the multilayer structure of the real skin, and conducting square blocks are arranged annularly referring to a clock, so that accuracy of direction representation is improved. Besides, an electromagnetic shielding layer is imported, so that electromagnetic insulation protection is formed, and measuring efficiency and accuracy are effectively improved.
Owner:CHINA UNIV OF MINING & TECH

Bird-imitating flapping wing mechanism

ActiveCN104192307AGreater lift and more stableSmall control torqueOrnithoptersFlapping wingGear wheel
The invention discloses a bird-imitating flapping wing mechanism and belongs to the technical field of flapping wing air vehicles. The mechanism mainly comprises a left transmission case, a left driven gear, a stander, a right driven gear, a right transmission case, a right flapping wing, a right driving gear, a right shaft, a synchronizing shaft, a left shaft, a left driving gear, a right flapping wing and the like; case bodies of the left transmission case and the right transmission case are symmetrically mounted on two sides of the stander through a bearing; the left driven gear and the right driven gear are fixedly connected with the case bodies of the left transmission case and the right transmission case respectively, and are engaged with the left driving gear and the right driving gear respectively, so as to form a main transmission system of the flapping wing mechanism; the left flapping wing and the right flapping wing flap synchronously at the same speed to generate lift force needed by an air vehicle; a left control steering engine and a right control steering engine form an aerodynamic force direction control mechanism of the flapping wing mechanism through bevel gear transmission in the left transmission box and the right transmission box; the aerodynamic force direction control mechanism changes the direction of the lift force by changing the initial mounting positions of the left flapping wing and the right flapping wing. The bird-imitating flapping wing mechanism has the advantages of relatively high and relatively stable lifting force, good dynamic balance, high transmission efficiency, long service life, sensitiveness in lifting force direction control, and the like.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY
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