4654 results about "Speed measurement" patented technology

The present invention bundles four ring oscillators, a 20-bit ripple counter and the necessary control logic needed to implement a JTAG scan based interface. The present system can be located on every die, so that each location can be individually tested. It communicates with the outside world through a standard JTAG interface. It is accessible at wafer, package, and system test which allows for several methods of correlating the oscillator speed to the speed of a part in the actual system.

The invention provides a method and a system for measuring speed of moving targets, which aims to solve slow response and other problems of the prior speed measurement method. The method comprises the steps of utilizing the basic principles of projective geometry, determining pixel coordinates in images and the coordinate mapping relation of pixels in real space through a camera calibration technique, utilizing the mapping relation to detect sequence frame images acquired by cameras, calculating the coordinates of the moving targets in the images in the real space, obtaining the motion curves of the moving targets in the real space through target tracking and then estimating the speed of the moving targets. The speed measurement method based on camera calibration has the advantages of fast response, large amount of detected information and capability of estimating the speed of all vehicles within a monitoring range in real time. Moreover, as the speed measurement of vehicles can be realized by utilizing the cameras, the method is easy to implement, lower in cost and easy to popularize and apply.

A closed loop shift control apparatus and method based on estimated torque in friction elements controls a torque transfer phase when shifting from a low gear configuration to a high gear configuration for an automatic transmission system. When pressure actuated friction elements are selectively engaged and released to establish torque flow paths in the transmission, estimates of torsional load exerted on the off-going friction element are used to predict the optimal off-going friction element release timing for achieving a consistent shift feel. The estimated torque is preferably calculated by using estimated torque signals generated as a function of speed measurements represented either the engine speed and turbine output speed or transmission output speed and wheel speed under dynamically changing conditions.

The invention discloses an intelligent system for monitoring vehicles and people in a community. The intelligent system comprises a monitor image collection module, a monitor image pre-processing module, a vehicle contour and license plate image information recognition module, a vehicle information database, a face image information recognition module, a people information database, an image information identification verification and positioning speed-measurement module and an intelligent management module. The monitor image collection module collects image information of the vehicles and the people, the monitor image pre-processing module pre-processes the image information, the vehicle contour and license plate image information recognition module processes, extracts and recognizes vehicle image information, and the face image information recognition module extracts and recognizes obtained people face information; and the image information identification verification and positioning speed-measurement module performs identification verification an positioning testing, and an intelligent control module is used for human-machine interactive interface operation and intelligent processing. The intelligent system monitors the vehicles and the people in the community and performs entrance guard management, thereby guaranteeing the trip safety of the people in the community.

The invention relates to the field of the car electronic and artificial intelligent field, and particularly discloses an active-mode intelligent safety monitoring instrument for a car and a monitoring method thereof. The active-mode intelligent safety monitoring instrument for the car comprises an embedded system (comprising a microprocessor, a monitoring program and relevant algorithm, which are cured inside a chip), a GPS module, a GSM module, an SIM card reader, an alarming device, a CCD camera, a multi-axis acceleration sensor, a power supply system (a lithium battery, a solar battery and a power supply adapter interface), an integrated circuit board, a shell (comprising a functional plate and a battery cover), an antitheft remote controller, a buckling-type rubbery-prevention remote controller and a power supply adapter. The instrument utilizes the GPS to realize the positioning, displacement bulgur prevention, speed measurement and timing, utilizes GSM to realize the auxiliary positioning and the SMS automatic alarming, utilizes the CCD combination mode to identify and monitor the fatigue driving, robbery and accident state and utilizes the acceleration sensor to detect the accident state. The instrument can realize the functions such as mobile positioning, over-speed alarming, positioning antitheft automatic alarming, positioning robbery-prevention alarming, fatigue driving prevention and warning, traffic accident automatic positioning, alarming and help, and the like.

In one aspect of the invention, a high-speed measurement system has a first and a second well bore. A first and second plurality of network nodes is integrated into and spaced at intervals along the first and second well bore, respectively. A communications channel connects each plurality of network nodes forming a first and second downhole network. A signal source is in communication with the first downhole network and a signal receiver is in communication with the second downhole network; and a common clock source is in communication with both the signal source and the signal receiver over the first and second downhole networks, respectively. The signal source and signal receiver are synchronized with the clock source and the signal source is adapted to send a signal to the signal receiver through a subterranean formation.

Disclosed herein is an apparatus for evaluating the safety of a building. The apparatus includes first and second measurement instruments which measure earthquake accelerations of the top and bottom stories, a fast Fourier transform unit which performs fast Fourier transform on the earthquake accelerations, an integration unit which double-integrates the measured earthquake accelerations and creates drift data of the top story and the bottom story, a maximum inter-story drift ratio calculation unit which calculates a maximum inter-story drift ratio, a natural frequency change rate calculation unit which determines a natural frequency of the building, and compares the natural frequency with an ambient natural frequency of the building so as to calculate a natural frequency change rate, and a building safety evaluation unit which compares the maximum inter-story drift ratio and the frequency change rate with preset evaluation criteria and outputs a result of evaluation in the safety of the building.

The invention discloses an integrated multi-channel synchronous vibration data acquisition, monitoring and analysis diagnosis device. The data acquisition unit comprises a signal conditioning circuit, an anti-aliasing filtering circuit, a multi-channel synchronous sampling chip, a system control logic unit, a pulse-shaping circuit (16), a phaselocking frequency multiplication chip and a microprocessor CPU, wherein the system control logic unit comprises a channel configuration logic unit, a clock generation logic unit, a rotating speed measurement logic unit, a sampling control logic unit and a frequency divider, and the data acquisition unit (1) is directly connected with a plurality of eddy current vibration displacement sensors, ICP type piezoelectric vibration acceleration sensors or magnetoelectric vibration speed sensors, and has an interface of a single-channel direct-connected eddy-current, photoelectric or magnetoelectric key phase/revolution speed sensor and so on. The CPU core board is connected with a computer or a palm computer through a network and a USB or a serial interface and finishes the data acquisition for monitoring and analysis diagnosis.

The invention provides a WiFi connection method. The method comprises the following steps of obtaining scanned WiFi hotspots; according to a connection instruction, selecting the optimal free WiFi hotspot obtained after sorting is performed on the basis of the comprehensive scores of signal strengths, the number of connection persons, the internet speed and the last time connection time of the WiFi hotspots; performing connection on the optimal free WiFi hotspot. The invention further provides a WiFi connection device. According to the WiFi connection method and device, the optimal free WiFi hotspot can be directly and automatically connected, intelligent WiFi connection is achieved, and speed measurement can be performed after connection is performed.

The invention discloses a train stopping control method and system. The method comprises the following steps: adjusting the speed of a train to arrive at a station to a station entrance speed which is obtained by an automatic train protection curve and an in-station limit speed; when the train arrives at the station, determining the current distance between the train and an operation parking spot according to a received pulse signal sent by positioning synchronization points preset on a track; calculating a recommending speed corresponding to the current distance through a train control algorithm according to the current distance between the train and the operation parking spot, and adjusting the current speed of the train; and exerting a recommended brake gear on the train to reduce the speed and stop the train when the train passes through the last positioning locating synchronization point. According to the technical scheme provided by the invention, the influence caused by low speed measurement resolution is reduced; and the train can accurately stop in the station under various speed measurement resolutions.

The invention discloses a navigation mobile phone for the blind. The navigation mobile phone is characterized in that: a user inputs destination reaching information by a voice module or a keyboard for the blind, a global positioning system (GPS)/GPSONE chip acquires the current position information of the user, and the destination reaching information and the current position information of the user are transmitted to a navigation server by a mobile phone radio frequency module; a travel scheme provided by the navigation server and a regional map are downloaded by the mobile phone radio frequency module, and navigation information general situations are broadcast to the blind by voices; simultaneously image information acquired by a dual-camera module is processed, traffic light, blind sidewalk or zebra crossing information is extracted and broadcast to the blind by the voices, and obstacle information is acquired and broadcast to the blind in a voice way by an ultrasonic ranging module and a microwave speed measurement module; and the falling or collision information of the user is monitored and recorded by a three-axis gyroscope and an accelerometer. The mobile phone is highly integrated, simply operated, convenient to produce, low in cost and suitable for wide popularization.

A vehicle speed measurement method and system for identifying a violating vehicle utilizing single image capturing unit. A vehicle image can be captured by the image capturing unit in order to estimate speed of the vehicle utilizing an ALPR unit. The license plate characters can be located and extracted from the captured image. A distance of the license plate from the image capturing unit can be calculated utilizing a physical character height from a reference point of the image capturing unit and a pixel character height generated by the ALPR unit. A position of the license plate in the field of view of the image capturing unit along with the distance information can be be utilized to determine a height of the license plate from a road surface. The height of the license plate can be employed to accurately estimate the vehicle speed.

This invention discloses a two-phase flow digital particle image speed test method and its device, which uses suitable particles to trace flow of fluids and uses high speed CCD camera to register motion images for tracing particles, liquid drops or gas bubbles, applies an image process method to separate the images of scattered phase particles drops or bubbles from original images and extracts velocities of them from their images and applies an improved cross correlation technology based on quick Fourier transformation to extract the velocity field of the tracing particles to realize the synchronous measurement to the two phase flows with different phase velocity fields. The device includes a HeNe laser, a triple prism and a cylinder lens, a high speed CCD camera, an image collecting card and a control and image process computer.

An analyzer (A) includes a measurer (42) for measuring an electro-physical quantity of a sample, and an acceleration measurer (43) for computing the acceleration of change of the electro-physical quantity such as a current measured by the measurer (42). The fail determination as to whether or not a predetermined condition necessary for performing analysis of the sample is satisfied is made based on the acceleration computed by the acceleration measurer (43). As a result, the fail determination in the analysis process of the sample can be performed accurately.

The present invention provides a system and method for generating a planting profile for seeds planted in a field using a seed planter that includes a seed transfer device. In various embodiments, the planting profile may be generated via a processor that communicates with a timing device and a seed sensor. The timing device is configured to provide timestamps associated with the presence of one or more seeds on a seed carrying feature of the seed transfer device as indicated by the seed sensor. Some embodiments further comprise a speed measuring device that is configured to measure and provide to the processor a speed of the seed planter as it travels through the field. Other embodiments further comprise a second seed sensor that senses seeds after exiting from the drop tube.

The invention relates to a non-contact track traffic speed-measurement and positioning method based on sleeper detection and a device thereof. Sensor are installed at the bottoms of train bodies, sleepers laid on tracks in parallel are used as detected objects, the sensors are triggered to generate electric pulses when trains pass through the detected objects, and then the speed measurement and the relative positioning of the trains are accomplished according to the sequence of the triggered sensors and the time each sensor causes the rising edges and the falling edges of the electric pulses. The device comprises more than two sensors installed at the bottom of the train bodies, and measurement control units. The non-contact track traffic speed-measurement and positioning method and the device thereof have the advantages of simple and compact structure, low cost, convenient maintenance, high reliability and wide range of application.

The invention relates to an initiative anticollision self-adapting fuzzy control method for a vehicle. The method comprises the following steps: measuring the relative speed of a self vehicle and a front vehicle and the speed of the self vehicle respectively by a radar speed measurement sensor and a hall vehicle speed sensor on the self vehicle; according to the situations of weather, road surfaces, vehicle types and loads and manual input information, obtaining the largest braking deceleration that the self vehicle and the front vehicle possibly achieve, and at the same time, according to a distance between the two vehicles, dividing the control behavior of the self vehicle into four grades; and comparing the actual distance D between the two vehicles, measured by a radar distance measurement sensor, with a safe vehicle following distance, a warning distance, a fuzzy control automatic brake distance and an emergency braking distance, and determining which section the actual distance between the vehicles falls into, so as to make a corresponding action. According to the method disclosed by the invention, a control system can be adjusted in a self-adapting manner without changing a fuzzy control rule list and a fuzzy control algorithm list, so that the control system can be adaptive to the changes of the situations of individual types of drivers, the weather, the road surfaces, the vehicle types, the loads and the like, and the stability, the reliability and the robustness of automatic brake are maintained.

A turbine (2) driven electric power production system (1), —said turbine (2) arranged for being driven by a fluid (3) having a fluid speed (v) varying in time, —said turbine (2) connected to a hydrostatic displacement pump (6) further connected to a hydrostatic displacement motor (8) as part of a closed loop hydrostatic transmission system (7), —said motor (8) arranged for driving an electrical generator (9) supplying AC power (10) at a frequency (f_g) near a given desired frequency (f_des), characterized by a closed loop system arranged for controlling a volumetric displacement (13) of the hydrostatic motor (8), comprising —a fluid speed meter (11m) arranged for producing a speed signal (11s) representing a speed (v) of said fluid (3), and —a rotational speed meter (12m) arranged for providing a rotational speed signal (12s) representing a rotational speed measurement (ω) of said turbine (2), —a motor displacement control system (15) for continuously receiving said speed signal (11s) and said rotational speed signal (12s) and arranged for calculating a control signal (16), —a volumetric displacement control actuator (17) on said hydrostatic motor, arranged for receiving said control signal (16) for continuously adjusting a volumetric displacement (d) of said hydrostatic motor (8) for maintaining a set turbine tip speed ratio (tsr_set) and thereby providing an improved power efficiency of the power production system (1) during fluctuations in said fluid speed (v).

A rotational angle-measurement apparatus with high accuracy is provided through the electric correction of the rotational angle-measurement apparatus by rotating the rotation shaft at a constant speed.

The invention relates to system and method of walking speed measurement and transmission and aims at providing a pedestrian gait detection-based system and a method of walking speed measurement and transmission. The system comprises an acceleration detection unit comprising a double-spindle acceleration sensor and peripheral circuits, an acceleration processing unit, a gait analysis unit, a speed analysis unit, a wireless communication emission unit, a wireless communication receiving unit and an output terminal. The speed detection system has the advantages of lower cost, convenient use and installation, basically no limitations in use, and better real-time performance and external interfaces in comparison with the prior art. Gait characteristics can be extracted from acceleration data during human movement so as to detect the instantaneous speed, the average speed, the displacement distance, the movement time of and the step number.

A monitoring system for a machine is provided. The machine includes at least one movable member including at least one sensor configured to generate at least one speed measurement of the moveable member. The machine also includes at least one processor coupled in electronic data communication to the sensor. The sensor is configured to generate at least one time stamp value for the at least one speed measurement signal. The at least one processor is configured to generate a plurality of time-stamped speed measurement signals of the at least one moveable member. The processor is further configured to determine a prioritization of the plurality of time-stamped speed measurement signals as a function of at least one predetermined temporal value.