517 results about "Body vibration" patented technology

Accurate occurrences of pulsation per unit time, that is, a heart rate is measured with a burden on a subject person being reduced to be very small and without being susceptible to body vibrations accompanying exercise. A heart rate monitor is produced, in which a light-emitting element 11 and a light-receiving element 12 are fitted to a head of a human body, light from the light-emitting element 11 is reflected at or transmitted through a subcutaneous artery 4 and/or blood running in the subcutaneous artery, the reflected or transmitted light is detected at the light-receiving element 12, and by using a CPU 14, the pulsation of the subcutaneous artery 4 and/or a change in bloodstream running in the subcutaneous artery 4 is measured from a change in intensity of the light detected at the light-receiving element 12, a pulse rate of the change in the bloodstream per unit time is calculated from this measured value, and the calculated pulse rate of the change in the bloodstream per unit time is regarded as a heart rate.

An object of the present invention is to execute an optimum control of vibrations due to a driver's operation of an accelerator pedal, steering wheel and brake pedal. The operation instructions are inputted into a vibration calculating means (kinetic model) comprising a vehicle body model, suspension model and tire model. Conventional kinetic model controlled the suspension in order to suppress the vehicle body vibration. However, in the kinetic model of the present invention, the tire vibration due to a change in the engine output is first absorbed by the suspension, whereby a residual vibration which was not be absorbed yet by the suspension is transferred to the vehicle body. The operation inputs are compensated by the three feed-back loops between the outputs of the above-mentioned three portions and input of the tire portion, giving the highest priority on the vehicle body model.

The invention discloses a one-step centering ship shafting mounting method. The one-step centering ship shafting mounting method comprises the following steps of: mapping out a shafting bow base point (11) and a stern base point (16) on a ship body; defining a shafting center line by a wire drawing method or a light irradiating method; arranging bored circles at the tail end of a bracket (15) and the front and rear ends of a stern shaft pipe (2), and arranging a checking circle on a reference board (8); boring a bearing mounting hole and then mounting a bearing in a pressing manner; mounting a propeller (1), a stern shaft (14), a spiral shaft (3), middle shafts (12 and 13) and shaft couplers (4 and 6); adjusting the middle shaft I (12) to ensure that the axis of the middle shaft I is overlapped with the circle center of the checking circle; and mounting a main machine (10) with centering the output end of the main machine (10) to the input end of the middle shaft I (12), which is taken as reference; and finally, mounting a shaft coupler III (9), sleeving middle bearings (5 and 7) on the middle shafts (12 and 13), adjusting the heights of the middle bearings (5 and 7), and then screwing bolts. The one-step centering ship shafting mounting method provided by the invention solves the problems that the ship shafting has the defects of large centering tolerance, large ship body vibration, large working amount and the like.

The invention provides a birotor permanent magnet motor and a washing machine with the same. The birotor permanent magnet motor comprises an inner rotor, a stator and an outer rotator which are sequentially arranged from inside to outside, and is characterized in that both the inner rotor and the outer rotor are permanent magnet rotors, and the stator comprises a magnetic modulation ring and a stator winding arranged on the magnetic modulation ring in a wound mode. The birotor permanent magnet motor is based on the magnetic field modulation principle and has a birotor structure, the outer rotor and the inner rotor can rotate according to certain proportional relation, and high-performance output of the motor under operating conditions of a low speed and a high speed can be met at the same time. When the birotor permanent magnet motor drives the washing machine to operate, not only are design requirements for low-speed large torque output and high-speed small torque output of the motor under the optimal operating state met, but also the structures of a belt pulley, a reduction gearbox and the like in a traditional washing machine are eliminated, transmission efficiency of the motor is improved, and meanwhile the defects of high noise, machine body vibration and the like of the traditional washing machine are overcome.

The invention provides equipment failure early-warning system and method. The equipment failure early-warning system has reliable operation, high performance-price ratio and visual interface, can transmit accurate equipment failure early-warning signals in advance and has failure type self-learning function. The equipment failure early-warning method comprises the following steps of: arranging proper types of sensors on proper positions of equipment to collect the parameters, such as bearing temperature, pressure, body vibration waveform, current variation waveform, and the like of the equipment; digitizing signals collected by the sensors by adopting a low-speed data collecting module and a high-speed data collecting module; developing specific computer software to process, store and analyze the various kinds of collected data; realizing the timely time-domain frequency-domain exchange and analysis of the waveforms, such as vibration, electric current, and the like by the software by using the mathematical methods of Fourier transformation, Wigner-Ville distribution, Hilbert-Huang transform, wavelet analysis, and the like; evaluating the various detected parameters by using a scoring method of an established file; and discovering and diagnosing the early exception of the equipment, thereby early warning the equipment failure. The equipment failure early-warning system adopts a modularized framework and comprises four modules of a sensor module, a data collecting module, a data processing module and a self-learning intelligent early-warning platform, the four modules are connected by a data transmission network, and a detection mode can adopt an on-line monitoring mode and a portable point detection mode.

The invention provides an opening-closing fault diagnosis method for an air circuit breaker based on vibration signals, wherein an acceleration sensor is used to collect machine body vibration signals generated during opening-closing courses of the air circuit breaker. The method comprises the steps that firstly, the acceleration sensor is used to collect the machine body vibration signals generated during opening-closing actions of the air circuit breaker and transform the vibration signals into digital signals, so that initial vibration signals are obtained; secondly, an improved wavelet packet threshold de-noising algorithm is used to process the collected vibration signals; thirdly, a complementary ensemble-average empirical mode decomposition algorithm is used to extract intrinsic mode function components from the de-noising vibration signals; fourthly, the quantity Z of the intrinsic mode function components is determined; fifthly, the intrinsic mode function components of the first Z orders are selected and extracted as sample entropies of a characteristic quantity; sixthly, binary tree multi-classifiers based on a relevance vector machine are established; and seventhly, the binary tree multi-classifiers based on the relevance vector machine obtained at the sixth step are used to establish a fault recognition model of the air circuit breaker.

The invented optical-fibre grating vibration sensor is characterized by that it utilizes a demodutation grating and a sensing grating and makes them be series-connected together, and respectively makes them be stuck on a main beam and an auxiliary beam, two beams are made of identical material and have identical heat expansion coefficient, so that their central wavelengths can be synchronously shifted with temperature, therefore they have automatic temperature compensation function so as to implement matching filter demodutation. Said invention utilizes the detection of light intensity change of sensing grating reflecting light to monitor the parameters of vibration frequency and vibration amplitude of monitored body, finally utilizes computer or single-chip computer to make analysis and processing of body vibration frequency spectrum.

The invention disclose a step-counting processing system and method, and the step-counting processing system comprises an acceleration sensing unit, a discrimination unit, a computing unit, an analyzing unit, and a step-counting unit; and the step-counting processing system is used for sensing the acceleration signal generated by the upper and down body vibration during the human walking course, and the projection operation of the sensed acceleration signal at the gravity direction is conducted, in order to obtain the waveform of the component of the acceleration signal generated at the vertical direction during human body walking, meanwhile, whether the waveform characteristic of the component of the acceleration signal generated at the vertical direction is continuous wave peaks and wave troughs is analyzed, and the analyzed result serves as the basis that whether cumulative steps are conducted, thereby achieving the purpose of refined calculation of walking steps for human body.

The invention discloses an aero-engine body vibration characteristic analysis method. An engine body system is separated into a rotor system and a stator system, the rotor system and the stator are coupled through a fulcrum system and are simulated jointly through dynamic characteristics of the rotor system and the stator system; the engine body system is separated into the two study objects, i.e., a rotor bearing system and a stator bearing system, and then vibration response and dynamic bearing reaction of the rotor bearing system are simulated and analyzed through a finite element analysis platform under the action of unbalanced exciting force and rub-impact force to acquire excitory input of the stator system; at last, the acquired dynamic bearing reaction and the rub-impact force are loaded on the stator bearing system, and the vibration response characteristics of the stator bearing system is simulated and analyzed to acquire engine body vibration characteristics. The aero-engine body vibration characteristic analysis method has the advantages of reducing hidden fault danger in the design of aero-engines and providing decision bases and technical support for engine vibration faults.

The invention relates to a method and structure for generating power through automobile kinetic energy, and belongs to the field of automobiles. An electric automobile resonance power generation optimization structure based on the lever principle comprises a kinetic energy power generation device on a hollow weight supporting plate, wherein the hollow weight supporting plate is arranged on an above-spring automobile body and is provided with a vertical elastic system; the method is characterized in that the hollow weight supporting plate and the above-spring automobile body have the same inherent frequency, straight racks are driven by a lever, the supporting point of the lever is arranged on an axle, the power end of the lever bears vibration force of the above-spring automobile body, and the resistance end of the lever drives the straight racks to vertically move along a sliding rail vertically fixed to a vibration guide frame; and in the compression and rebound stroke of the above-spring automobile body, the lever drives the different straight racks, gears engaged with the straight racks are driven, a center shaft of an electric generator generates the same-direction continuous torsional force, the torsional force and resonance action force generated by the hollow weight supporting plate during automobile body vibration are superposed, and the electric generator generates electricity.

The invention discloses a method for constructing a simulation model of converter cabinet body vibration. The method includes the steps that 1, a finite element model of a converter cabinet body is constructed; 2, the simulation modality of the finite element model is calculated, the test modality of the converter cabinet body is introduced, whether the consistency of the simulation modality and the test modality meets a preset first consistency standard is verified, if yes, step 3 is carried out, and if not, parameters of the finite element model are amended, and the step 2 is repeated; 3, the actual response data of an actual test is used as the input of the finite element model, and the load of an exciting point is calculated; 4, the load of the exciting point is used as the input of the finite element model, and the simulation response output of a response point is calculated; 5, whether the consistency between the actual response data and the simulation response output meets a preset second consistency standard is verified, if yes, construction of the simulation model is completed, and if not, the rigidity parameter of the finite element model is amended, and the step 4 is carried out. The method has the advantages that the accuracy of simulation results obtained by the simulation model and high simulation precision are ensured.

A method of conditioning a body for swimming in conjunction with an inclined bench of the type having a sliding top carriage comprising the steps of: a) providing i) a vibration generation unit having a housing containing vibration generation and a vibrating member; ii) a member attachment to facilitate transmission of the generated vibration to the body; and a base for the vibration generation unit capable of orienting the vibrating member in a position generally parallel to an incline of the bench; b) orienting the vibration generation unit on the base so that its vibrating member reciprocates on a plane generally parallel to the bench; and, c) positioning and securing the vibration generation unit beneath the bench. Then a swimmer lying face down on and carried by the carriage can slide the carriage cyclically along the incline by pressing his hands on the vibrating member attachment specifically conditioning his arms and upper torso.

The invention belongs to the technical field of air compressors, and relates to a low-noise structural oilless air compressor which comprises a cylinder, a cylinder cover and a piston, wherein the piston is provided with a sealing ring or a sealing leather cup made of a self-lubricating material, a crankcase is tightly connected with a crankcase cover plate and forms a crankcase intake muffler, an air intake one-way valve is arranged at an air intake or an air intake passage of the crankcase intake muffler communicated with the outside atmosphere, a damping pad is arranged between an exhaust valve plate and a valve seat, the valve seat is connected with a silencing cap, a crank pin is made into the shape of a spline or similar to the spline, a heat insulation hole or a heat insulation slot is arranged on a connecting rod body, and a heat insulation pad is arranged at the joint of a fastening bolt and the piston or a connecting rod. The low-noise structural oilless air compressor has the advantages that the air intake noise is low, the working temperature and the mechanical noise of a bearing are low, and an auxiliary balance block is arranged on a cooling fan, thereby reducing the vibration amplitude of the compressors, and effectively reducing the body vibration noise.

The invention discloses a through type inertial mass energy storage suspension and relates to the technical field of vehicle suspensions. The through type inertial mass energy storage suspension comprises a suspension cross beam (1), a lower-left swing arm (2), a left wheel vibration isolator (3), an upper-left swing arm (4), a vehicle body vibration isolator (5), an upper-right swing arm (8), a right wheel vibration isolator (9) and a lower-right swing arm (10). The invention not only greatly improves the comfortableness for sitting in the vehicle, but also improves the safety for driving and ensures that the integral performance of the suspension is greatly improved. The invention has the advantages of compact structure, low height, high possibility of arrangement and no need of complicated controller, control strategy and electronic element as well as energy input, low cost and high reliability.

Methods and apparatus for damping vibrations within a stage device using controllable dampers are disclosed. According to one aspect of the present invention, a method for adjusting an amount of resistance associated with a stage device which has a table, a first surface, and a coupler positioned substantially between the table and the first surface includes accelerating the table and applying a resistance between the table and the first surface when the table is accelerating. Applying the resistance includes providing a first adjustment to the coupler. The method also includes substantially removing the resistance from between the table and the first surface when the table is not accelerating, wherein the resistance is substantially removed by providing a second adjustment to the coupler. In one embodiment, the stage device further includes a first damper that is arranged to substantially damp an elastic body vibration of the wafer table.

A suspension system for a vehicle, including (a) four displacement force generators (152) each configured to generate a displacement force forcing sprung and unsprung portions of the vehicle toward or away from each other; and (b) a control unit (200) configured to control the displacement force that is to be generated by each displacement force generator. The control unit is capable of executing a plurality of vibration damping controls concurrently with each other, by controlling the displacement force, so as to damp a composite vibration containing a plurality of different vehicle-body vibrations which are to be damped by the respective vibration damping controls. The control unit is configured to refrain from executing at least one of the vibration damping controls for damping one of the vehicle-body vibrations that is not required to be damped, in a low vibration intensity situation in which intensities of sprung-portion resonance-frequency vibration components in respective four sprung portions of the vehicle are lower than a threshold intensity degree.

The invention discloses a control method for key-free emergency unlocking of a car door. According to the control method for key-free emergency unlocking of the car door, a control module obtains a car body vibration signal through a vibrating sensor, a judgment is made by taking the number and time interval of pulses of the vibration signal as the characteristics of an unlocking password, and control over car door lock unlocking is conducted when the unlocking password is the same as a preset password. The control method for key-free emergency unlocking of the car door has the remarkable advantages that due to the fact that the number and time interval of the pulses of the vibration signal generated when the car body is knocked serve as the unlocking password, emergency unlocking of the car door can be achieved conveniently when a car key is locked in a car due to carelessness, and people can go out extremely conveniently; in addition, due to the fact that an activation code, different time intervals and the maximum number of times of mistaken input are set, unlocking of the car door due to misoperation or accidentally knocking of other people can be effectively prevented, and the security of the unlocking password and the safety performance of the car are improved.

Disclosed is an automatic screw driving machine for a wiring terminal. The automatic screw driving machine for the wiring terminal comprises a machine frame, a workbench and an assembling and feeding rail. The assembling and feeding rail is provided with an upper terminal shell station, a terminal shell correction station, an upper terminal body station, an upper screw station, a plurality of screw turning stations and a finished product detection station. A terminal shell vibration feeding tray, a terminal shell feeding mechanism and a terminal shell detecting mechanism are arranged on the rear portion of the upper terminal shell station. A terminal shell correction mechanism is arranged on the terminal shell correction station. A terminal body vibration feeding tray and a terminal body charging mechanism are arranged on the rear portion of the upper terminal body station. Screw vibration feeding trays, a screw flow dividing device and a screw charging mechanism are arranged on the rear portion of the upper screw station. Electric screw drivers are arranged above the screw turning stations. A finished product detection mechanism is arranged above the finished product detection station. By the adoption of the structure, automatic assembling of the wiring terminal can be achieved, production efficiency is greatly improved, and labor intensity is lowered.

The invention relates to a vest for real CS (Counter-Strike), comprising a vest body, a main control unit arranged on the vest body, a laser induction unit connected with the main control unit and used for receiving laser signals from laser emitting guns, a vibration sensor for acquiring a vest body vibration frequency, a miniature vibration motor for driving the vest body to vibrate and a storage unit for at least storing vest simulation health points, and further comprising soft touch buttons respectively arranged on the left side, the right side and the back of the vest, wherein two groups of miniature vibration motors are provided and one-to-one correspondingly arranged at the peripheries of the soft touch buttons at the left side and the right side of the vest respectively. By applying the real CS field-fight system provided by the invention, the situations that the corresponding part loses functions after a player is shot, actions are delayed and the player only can leave the field with the help of teammates when the player is in serious injury are simulated, so that the player can pay more attention to team spirit, besides, a certain degree of humanistic color is given to the game while the sense of reality of the present laser simulation shot counter system is improved.

The invention provides a sleep detection method and detection system based on body vibration signals. The system comprises a first amplifier, a filter, two second amplifiers, an analogue/digital signal converter, a signal interface and a server sequentially connected with a sensor, wherein the first amplifier is connected with the signal interface; one second amplifier is connected with the signal interface; and the server is used for analyzing the received signals and outputs the analysis result to information terminal equipment. The detection method comprises the following steps: collecting the body movement signals, and judging the sleep state according to the waveform amplitude variance of the body movement signals; converting the body vibration signals into electric signals by a piezoelectric sensor; extracting the breathing heart rate through the signal processing circuits such as an amplifying module; and evaluating the sleep quality by use of a sleep detection algorithm established based on movement amplitude, heart rate and breath. The test result indicates relatively high accuracy; and the method does not influence normal life of a user and is of great significance to non-contact sleep detection.