516 results about "Acceleration time" patented technology

Systems and methods according to the invention employ an acceleration sensor to characterize the synchrony or dyssynchrony of the left ventricle. Patterns of acceleration related to myocardial contraction can be used to assess synchrony or dyssynchrony. Time-frequency transforms and coherence are derived from the acceleration. Information and numerical indices determined from the acceleration time frequency transforms and coherence can be used to find the optimal pacing location for cardiac resynchronization therapy. Similarly, the information can be used to optimize timing intervals including V to V and A to V timing.

The invention provides a monitoring apparatus (1) for an ambulatory subject (2) that includes a portable monitor (3) mountable on subject (3) that includes an accelerometer that determines the instant acceleration of subject (2) in one or more determined directions. It further includes a processing unit (7) that determines at least one instant ambulatory performance indicia of subject (2) from the determined instant acceleration, determines at least one designated performance threshold from at least one previously determined instant ambulatory performance indicia and initiates an event under predetermined conditions that is communicated to remote receiver (5) for the attention of carer (11), providing remote monitoring and supervision of subject (2) based on ambulatory performance of subject (2).

The invention provides a pedometer and a program. whenever an output signal of an acceleration transducer is detected to a reducing from an increasing(e.g. being a peak value), the peak value is compared with a first threshold value, and a time interval between the peak value and the detection timing of the previous peak value is compared with a second threshold value to judge whether to count the step number, and then, the detected peak value is compared with a third threshold value greater than the first threshold value, and a time interval between the peak value and the previous peak value is compared with a fourth threshold value representing a time shorter than the second threshold value to judge the action type of users(e.g. running, walking or other state). Under the situation of being judged as running or walking, the falling steep degree of a wave form after appearing a peak in an acceleration time waveform is estimated according to the judged result, and the step number is added up according to each action type.

A system and method for mass analysis of ions. The system includes an orthogonal acceleration time-of-flight mass analyzer having at least two channels configured to receive respective groups of ions from respective ion sources and having a field-free section configured to mass-separate ions during flight time. The groups of ions are directed to different ones of the channels of the mass analyzer for mass analysis of the respective groups of ions, and at least a part of the field-free section is shared between the channels. The method introduces the ions into an orthogonal acceleration time-of-flight mass analyzer, directs groups of ions from respective ones of the two sources into different channels of the mass analyzer, and simultaneously mass-analyzes the groups of ions from the different channels.

The invention discloses a shock absorbing system with a combined rigidity and damping adjusting function and a shock absorbing method. An air spring with an additional air chamber and a magnetorheological shock absorber which are connected in parallel are arranged between an upper connecting plate of a suspension frame and a bottom plate of the suspension frame; and the air spring is connected with the additional air chamber via a positioning control valve. The shock absorbing method comprises the following steps that a controller performs Fourier transformation on automobile body response acceleration time domain signals at a specified time interval, and outputs control signals to the positioning control valve according to the biggest excitation frequency of vertical energy, the opening of an orifice between the air spring and the additional air chamber is controlled and adjusted in real time, so that the rigidity of the suspension frame is changed, the purpose of avoiding the excitation frequency is achieved, the damping of the suspension frame is adjusted by changing input current of the magnetorheological shock absorber, and shock is attenuated further. The combined rigidity and damping adjusting function can be realized, an adjusting range is expanded, the shock absorbing system adapts to complex and changeable running work conditions of automobiles, and the shock absorbing property is increased.

The invention provides an integrated frequency difference method of a cable stayed bridge cable tension test. The method comprises the following steps: firstly, reading three frequency values fi, fj and fk which are corresponding to a first peak, a second peak and a third peak in an auto-power frequency spectrum graph of a tested cable actual measurement acceleration time history; secondly, obtaining a fundamental frequency initial value f by utilizing the three frequency values corresponding to the three peaks; thirdly, determining a possible order corresponding to each frequency; finally, determining basic frequency fv and cable tension T. According to the invention, calculation is simple, operation is carried out according to a process, other complex determination and processing processes are not needed, result accuracy is raised, technology difficulty in a cable tension test is substantially reduced, by employing the method, high efficiency is realized, data analysis processing time can be saved, test cost is reduced, and economy is good.

A mass spectrometer is disclosed wherein a z-lens upstream of an orthogonal acceleration Time of Flight mass analyser is repeatedly switched between a first mode wherein ions are transmitted to the mass analyser for subsequent mass analysis with a relatively high transmission and a second mode wherein ions are transmitted with a relatively low transmission. If it is determined that mass spectral data obtained when the mass analyser is in the first mode is suffering from saturation, then suitably scaled mass spectral data obtained when the mass analyser is in the second mode is used instead. If the saturation is severe then the mass spectral data obtained in the first mode may be replaced in its entirety with mass spectral data obtained in the second mode.

The embodiments of the present invention disclose an automatic power-off method for a mobile terminal. The method comprises the following steps: receiving an instantaneous acceleration value of a mobile terminal in the vertical direction, which is detected by a gravity sensor in real time; judging whether the received instantaneous acceleration value is greater than or equal to a preset acceleration threshold value or not; and if the instantaneous acceleration value is greater than or equal to the preset acceleration threshold value, sending a power-off instruction to a hard power-off circuit module so as to cut off a power source of the mobile terminal. The embodiments of the present invention also disclose an automatic power-off device, a mobile terminal and a computer storage medium.

The invention provides a driving safety safeguard system based on an intelligent mobile phone. The system comprises at least one intelligent mobile phone fixed in an automobile driving room through a support as well as an alarming center, wherein the intelligent mobile phone is responsible for monitoring and determining whether collision accidents occur for the automobile, and performing alarming and self-rescue automatically when accidents occur; the alarming center comprises an alarming server and an artificial seat, and is responsible for receiving and displaying alarming information, receiving, storing and reporting images and sound data, and answering alarming calling; the intelligent mobile phone continuously records information of images, sound around, GPS (global positioning system) coordinates, vehicle speed and the like in front of the driving vehicle, monitors the instant acceleration of the vehicle, and determines whether the collision accidents occur accordingly. Once the accidents are determined to occur, automatic alarming self-rescue is carried out, and comprises alarming information sending, alarming center calling, key image and sound information uploading, and the like. The driving safety safeguard system based on the intelligent mobile phone provided by the invention is simple to implement, common functions and extended functions of automatic alarming self-rescue in danger, key data backup, and the like of a common driving vehicle recording instrument can be realized through a mode of mounting and applying the intelligent mobile phone.

The invention belongs to the technical field of mobile terminals, and discloses a mobile terminal, and a volume control method and a volume control device thereof. The volume control method comprises the following steps of: acquiring the instantaneous acceleration of the mobile terminal in the instantaneous motion process of the mobile terminal; calculating a volume control value which corresponds to the instantaneous acceleration according to the acquired instantaneous acceleration; and controlling the volume playing of the mobile terminal according to the calculated volume control value. Byacquiring the instantaneous acceleration of the motion of the mobile terminal, calculating the corresponding volume control value according to the instantaneous acceleration and adjusting the volume playing according to the calculated volume control value, the volume control method makes the mobile terminal automatically adjust the volume playing according to the motion condition per se, greatly improves the quality of the sound received by a user, enhances the user experience on the music further, and is humanized.

The invention discloses a control method and an intelligent device applied to a pilotless automobile. The specific embodiment of the method comprises the steps of receiving a driving habit selection instruction input by a user; obtaining driving habit information corresponding to the driving habit selection instruction, wherein the driving habit information comprises a driving route, a driving speed, acceleration time, deceleration time and a braking distance; and controlling the pilotless automobile on the basis of the driving habit information. On one hand, the automobile is automatically controlled to drive by the collected driving habit information of the user, the operation in the driving process is simplified, and the driving habit information can be shared with other users; on the other hand, the pilotless automobile can be controlled by the obtained driving habit information of a professional driver, while the driving stability and safety of the automobile are improved, and the optimization cost of operation and control of the pilotless automobile is reduced.

A method for performing bridge monitoring by using multiple strapdown inertial systems belongs to the bridge monitoring technology and includes: performing position setting for the strapdown inertial systems according to the dynamic characteristic of a bridge structure and performing installation calibration and initial calibration for the strapdown inertial systems; carrying out bridge dynamic load tests which include a pulsating test, a sports car test and a bumping test, and performing continuous monitoring by using deformation and vibration information of the strapdown inertial systems relative to a reference point and measurement points; obtaining static deformation angles and dynamic deformation angles of the measurement points of the bridge at each moment by using the deformation information obtained in an inertial test matching method; obtaining a girder deflection curve of the bridge by using the dynamic deformation angles of the inertial systems calculated at the reference point and the measurement points, and obtaining an impact coefficient of the bridge through further processing; using accelerometer output information to obtain acceleration time history curves of all the measurement points and obtaining displacement time history curves through integration; and analyzing the acceleration time history curves and the displacement time history curves in a time domain analysis method and a frequency domain analysis method to obtain structural parameters including bridge amplitude, damping ratio and vibration mode. The method has the advantages of being free of weather variation interference, little in manual operation, high in automatic degree and capable of performing continuous measurement.

The invention aims to seek optimal dual-motor power parameters by considering contradiction between power performance and economical efficiency, and improve the power performance and endurance of a pure electric vehicle by reasonably selecting the dual-motor power parameters, and discloses an energy consumption-oriented parameter optimization and matching method for a dual-motor power system of the pure electric vehicle. The parameter optimization and matching method comprises the following steps of performing preliminary parameter matching on a dual-motor torque and rotary speed coupling structure, which is researched previously and has four working modes, based on an NEDC working condition and the like; next, on the basis of comprehensive consideration of the power performance and the economical efficiency of the electric vehicle, establishing a dual-motor power system parameter optimization model which takes acceleration time in 100 kilometers and specific energy consumption as a target, takes motor power, rotary speed, and transmission ratio as optimization variables, and takes power performance as constraint; and finally, solving the optimization model by a crossed particle swarm optimization, and performing comparison and analysis on an optimization result.

An orthogonal acceleration time-of-flight (oa-TOF) mass spectrometer has an ion source producing ions, a first region of a low degree of vacuum, an ion reservoir, and a second region of a high degree of vacuum. A space for transporting the ions produced by the ion source is placed in the first region. The ion reservoir accelerates the ions transported in from the first region in a pulsed manner and extracts the ions. A time-of-flight mass analyzer for mass separating the ions extracted from the ion reservoir is disposed in the second region, together with the ion reservoir. An isolation valve is mounted in a hole that places the first and second regions in communication with each other to permit the first and second regions to be isolated from each other.

Provided is an S-type acceleration and deceleration control method of a numerical control machine tool. Firstly, a machining program is input into a numerical control system, a numerical control device obtains necessary data, then a pentabasic nonlinear equation set referred to in S-type acceleration and deceleration control is factorized into two binary nonlinear equation sets and one unitary linear equation according to the shortest time rule and the limiting conditions of speed and accelerated speed, acceleration time and deceleration time meeting requirements are gradually solved through the Newton iteration method and the iteration correction method, then a speed curve is solved, interpolation operation is carried out finally, pulses are output, and the machining tasks of workpieces are completed. According to the method, the complex and tedious operation of existing S-type acceleration and deceleration control can be effectively avoided, and the acceleration and deceleration control method is high in precision, short in solving time, easy to understand and convenient to implement.

The invention provides a positioning method and device. The positioning method comprises the following steps: an instantaneous acceleration measurement volume of a mobile terminal is acquired; an instantaneous speed of the mobile terminal is acquired; a GPS signal is received; a positioning point track is acquired; the strength of the received GPS signal is contrasted with a preset threshold value; when the strength of the GPS signal is higher than the preset threshold value, instantaneous speed calculation adjustment parameters and displacement calculation adjustment parameters are acquired; the instantaneous speed, the instantaneous speed calculation adjustment parameters and the displacement calculation adjustment parameters of the mobile terminal are corrected; whether landmark information is perceived is judged; if yes, the perceived landmark information is verified with standard map information, and the positioning track of the mobile terminal is corrected. According to the positioning method and device, a motion sensor is used for calculating the state of the mobile terminal in real time, positioning accuracy is adjusted in real time by means of perceiving special landmarks in the running process, and therefore the requirement for positioning a vehicle accurately in real time in a city is met.

A direct drive washing machine is disclosed which is capable of performing a washing operation by efficiently converting electric energy supplied into an electric motor (10) into mechanical energy or with less vibration and noise. When a washing operation is carried out with efficient energy conversion, an acceleration time and a deceleration time of an agitator (8) rotated by the motor (10) are controlled on the basis of a measured value of a vibration sensor (25) or a measured value of clothes weight so that vibration of a water-receiving tub (4) becomes maximum. On the other hand, when a quiet washing operation with less vibration is carried out, the acceleration time and the deceleration time of an agitator (8) rotated by the motor (10) are controlled on the basis of the measured value of the vibration sensor (25) or the measured value of clothes weight so that vibration of the water-receiving tub (4) becomes minimum.

The invention provides a method for rotating a screen display direction of equipment through shaking the equipment. The method comprises the steps of: acquiring a service related to a current equipment sensor by calling an operation system when a specific application program is accessed; judging whether the equipment comprises an acceleration sensor; acquiring data output by the acceleration sensor, and judging whether a user carries out an effective screen shaking action according to the acquired acceleration time and acceleration value; acquiring a current screen display direction and returning an acceleration great-change counter to zero after the current screen display direction is rotated; and when the program is quit or restarted, setting the screen display direction according to system setup or default configuration of the program per se. No mater what settings are made to a system direction by the user, the user can realize temporary screen rotating operation by shaking the equipment and can fix the screen so as to ensure that the screen is not converted frequently under the action of gravity.

The invention discloses a whole vehicle functional safety monitoring system, which is a centralized whole vehicle functional safety monitoring system with a torque monitoring and an acceleration monitoring, an acceleration signal source is introduced for monitoring the instantaneous whole vehicle acceleration information in real time, the validity of the whole vehicle torque distribution control is considered by the torque comparison monitoring and the whole vehicle acceleration comparison monitoring, when the whole vehicle power system torque calculation and controlling occur an undesired torque increase, security protection can be carried out on the basis of the torque comparison information and the whole vehicle acceleration information of the current vehicle, so that the centralized monitoring of the vehicle functional safety can be realized; the whole vehicle functional safety monitoring system has the advantage that the requirement on the function safety level of the terminal power source controller is lowered, so that the complexity and cost of the monitoring system is reduced, and realization of the systematic design with the more higher functional security level is facilitated.

A washer and a method of determining a load weight are disclosed. The washer includes a tub which stores clothes to be washed, and a motor which rotates the tub. It further includes a microprocessor which measures an acceleration time during which the motor rotates up to a certain speed, and a deceleration time during which the motor comes from another certain speed to a full stop. Then, the microprocessor determines the load weight by using at least one of the acceleration and the deceleration times.