519 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.

The invention relates to a driving behavior warning method based on vehicle bus data. The driving behavior warning method based on vehicle bus data is characterized by comprising an iOBD terminal and an iOBD monitoring platform, wherein the iOBD terminal provides the following data according to the driving state: sudden brake times (b), sudden acceleration times (a), sudden turning times (t), rotating speed (r), average speed (v) and driving distance (d); the iOBD terminal transmits the data information to the iOBD monitoring platform; the iOBD monitoring platform performs statistics and analysis on the driving behavior data of a user and determines the comprehensive driving behavior score of the user; and the iOBD monitoring platform transmits the comprehensive driving behavior score of the user to a mobile phone of the user to serve as the basis of judging advantages and disadvantages of long-term driving behavior, prompts according to the score and triggers warning according to the real-time data. By the driving behavior warning method based on vehicle bus data, the driving behavior score of the user is calculated according to the preset user driving behavior statistics analysis model. The driving behavior warning method based on vehicle bus data has the advantages that the advantages and the disadvantages of the driving behavior of the user can be judged; an analysis report is formed and transmitted to the user; and the driving safety of the user is greatly improved.

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.

Disclosed is a method of controlling drive speed of a motor operating in overload conditions. The method includes the steps of: driving the motor at a predetermined reference speed; detecting phase voltage and phase current applied to the motor; determining whether or not the motor is operating in overload conditions based on the detected phase voltage and phase current; and controlling the motor according to whether or not the motor is operating in overload conditions. Accordingly, the present invention can prevent occurrence of over-current due to the instantaneous acceleration of the motor to a predetermined initial speed.

The invention relates to a complete set of test method of a soft soil iron structure vibration table. The method comprises the following steps of: preparation of soft soil in a model box in a vibration table model test, design of a model box, and typical subway station structure and joint structure test simulation and measurement system. The station structure and joint structure model can be manufactured from a particle reinforced concrete structure; and the inner side of the rigid boundary in the excitation direction of the model box is lined with a flexible material. The rigid fixing boundary is made into a support frame by angle steel, a wood plate is used as the side wall of the box body inside, and the bottom material is steel plate. In a direction vertical to the horizontal vibration direction, each inner wall of the box body is lined with a polystyrene foam plastic plate; and in the direction of the horizontal vibration, a polystyrene film is stuck on each inner wall of the box body, and broken stone is stuck on the bottom of the model box. A resistance strain gauge type pressure box of the measurement system measures the ground-breaking pressure time interval of the soil body in the model box, a resistance strain sensor measures the strain time interval of the station structure, and a piezoelectric type acceleration sensor measures the acceleration time interval of the soil body and the station structure. The method provided by the invention realizes vibration table test for the station structure and running tunnel structure community in the underground railway building structure of a soft soil region.

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 photolithography tool, e.g. for microelectronics production, having the stage units (both mask and substrate stage units) composed of two identical stage assemblies which are simultaneously driven with the programmed production motions. The acceleration time histories of the stage assemblies within the unit are identical but opposite in direction. Thus, the photolithography tool processes two substrates simultaneously while being free from objectionable dynamic loads and from shifts of its center of mass.

The invention provides a method and a system for speed guide at an intersection with traffic signal lights. The method comprises the following steps: when detecting traffic signal light information of an intersection in front, acquiring the distance between the current position and the stop line of the intersection in front; calculating the arrival time needed to arrive at the stop line according to the current speed and the distance; judging the current traffic signal state, including passing and no passing; if passing is allowed, judging whether the remaining time is greater than the arrival time; if the remaining time is greater than the arrival time, prompting the driver to keep driving at the current speed; if the remaining time is not greater than the arrival time, calculating the acceleration time needed to arrive at the stop line, and judging whether the acceleration time is greater than the remaining time; if the acceleration time is greater than the remaining time, prompting the driver that there is no need to accelerate; if the acceleration time is not greater than the remaining time, prompting the driver to accelerate; if passing is prohibited, judging whether the remaining time is greater than the arrival time; if the remaining time is greater than the arrival time, prompting the driver that there is no need to accelerate; and if the remaining time is not greater than the arrival time, prompting the driver to keep driving at the current speed. The method and the system help vehicles to pass an intersection at proper speed, save time for users, and guarantee the safety of traffic.

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.

Disclosed is a method for screwing in and tightening a screw connection (1) to a predetermined tightened level (2), especially a predetermined torque level (2) or a predetermined pretension level, with the aid of a hand-held screwing tool (3) comprising a regulated drive unit (4) and / or control functionality, particularly an electric nut runner (3). A tightening phase (B-C-D), during which the screw head rests against the supporting surface (6) of the screw connection (1), starts following a screwing phase (A). In order to improve said method, the speed (N) of the screwing tool (3) is increased to an output speed (7) for the tightening phase (B-C-D) within an acceleration time (8) in the tightening phase (B-C-D) and is lowered within a delay time (9) prior to or until reaching the predetermined tightened level (2). The combined acceleration time (8) and delay time (9) represents the predominant part of the entire tightening phase (B-C-D), especially in relation to the traveled angle of twist (W) of the screw connection (1), the acceleration time (8) being shorter than the delay time (9).

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 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.

The invention belongs to the technical field of analysis over travel behaviors of residents, and particularly relates to a position-trajectory-based travel state splitting method, which comprises the following steps of performing GPS (Global Positioning System) positioning to obtain latitude and longitude coordinates of a position trajectory; calculating the distances of trajectory points, instantaneous speed and instantaneous acceleration; performing data cleaning and abnormal data processing; matching a manually identified travel manner; selecting different time intervals T, and splitting a travel state; performing characteristic extraction and sequential storage; performing Euclidean-distance-based similarity measurement on adjacent segments by taking characteristics of the travel segments as characteristic vectors, determining a proper time interval, and determining splitting points to realize the splitting of the travel state according to distance similarity measurement. According to the method, key points of the travel state can be determined more accurately, and the travel state can further be better split; compared with a conventional fixed time period and key point travel state splitting method, the method is more objective and reliable.

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.

The invention relates to the technical field of urban traffic optimization, in particular to an urban rail transit energy-saving time table and an operation curve optimization method, and the method comprises the steps: S1, obtaining the basic data of an urban rail train, an urban rail line and an urban rail operation time table; S2, aiming at the operation process of a single train between singlestations, obtaining energy-saving operation speed curves of the single train between the stations at different operation times; S3, aiming at the operation process of the single train among a plurality of stations, obtaining an energy-saving interval operation time distribution scheme and a corresponding speed curve; S4, calculating the traction acceleration time length and the braking deceleration time length of each inter-station speed curve obtained in the step S3; S5, aiming at the operation process of multiple trains among multiple stations, obtaining an energy-saving departure intervaland stop time; S6, outputting an optimization result. The energy-saving operation speed curve is short in calculation time and small in error; traction energy consumption among multiple stations is reduced, and the regenerative braking feedback energy utilization rate is increased.