55results about How to "Reliable speed" patented technology

The invention detects the loft time, speed, power and/or drop distance of a vehicle, such as a sporting vehicle, during activities of moving and jumping. A loft sensor detects when the vehicle leaves the ground and when the vehicle returns to the ground. A controller subsystem converts the sensed information to determine a loft time. A display shows the recorded loft time to a user of the system. In addition, a speed sensor can detect the vehicle's speed for selective display to the user. A power sensing section informs the user of expended energy, which can be compared to other users. A drop distance sensing unit informs the user of the peak height of a jump, during an airtime. Gaming on the internet is facilitated to connect worldwide sport enthusiasts.

A buoyant platform apparatus, such as a buoy, is described that comprises a laser radar (lidar) wind speed measurement device. The lidar is arranged to make wind velocity measurements at one or more remote probe volumes of known position relative to said platform. The wind speed measurement apparatus may further comprise motion sensing means that, in use, monitor motion of the platform allowing wind speed at an absolute position in space to be measured. Wind velocity data may also be compensated for platform movement.

An autonomous personal transportation system for moving passengers and light freights is constructed with a track network and small vehicles on the track network. There are a number of stations and stops for loading and unloading on side tracks off the mainline of the track network. The vehicle width is limited to a dimension for one seat. The vehicles can be coupled statically or dynamically to form a train. The track has side rails for the rigid wheels of the vehicle and a central rail for centering the vehicle on the guideway and providing additional acceleration and braking capability. The control system for the movement of vehicles is divided into three levels: the central control system, the wayside control system and the vehicle control system.

A digital image capture and processing system supporting automatic communication interface testing/detection and system configuration parameter programming. The digital image capture and processing system includes a housing having a port for receiving a standard connector associated with a flexible communication interface cable, and a multi-interface I/O subsystem disposed in the housing, and having an I/O port. The multi-interface I/O subsystem supports a software-controlled automatic communication interface test/detection process carried out over the flexible communication interface cable physically connecting the I/O ports of the digital image capture and processing subsystem and the designated host system. The digital image capture and processing system also supports automatic programming of multiple system configuration parameters (SCPs), associated with a particular communication interface (CI) detected by the multi-interface I/O subsystem, without reading programming-type bar codes.

The invention relates to a coaxial direct-detection LIDAR system for measuring velocity, temperature and/or particulate density. The system comprises a laser source for emitting a laser light beam having a lasing center frequency along an emission path. The system further comprises an optical delivery system arranged in the emission path of the laser source, the optical delivery system being arranged for delivering the laser light beam in a measuring direction, the optical delivery system further being configured for collecting a return signal backscattered along the measuring direction. Finally, the system comprises a detector system arranged to receive the return signal from the optical delivery system, the detector system comprising a narrowband optical filter and a detector, the narrowband optical filter having a filter center frequency of a pass-band, wherein the center lasing frequency and/or the center filter frequency may be scanned. The invention further relates to an aircraft airspeed measurement device, and a wind turbine airspeed measurement device comprising the LIDAR system.

The invention relates to a rotary speed adaptive robust control system and method for an ultra-high-speed permanent magnet synchronous motor. The method comprises the steps of determining a motor rotary speed estimated value and a motor rotary speed error value by adopting a sensorless rotary speed estimation algorithm; determining a corresponding control amount by adopting an adaptive robust rotary speed control algorithm; determining a stator flux, a torque feedback value, flux error and torque error through motor three-phase current and three-phase voltage; performing voltage vector selection to obtain a basic voltage control signal; determining rotor position information through the sensorless rotary speed estimation algorithm; obtaining a three-phase compensation voltage by adopting a dead region compensation algorithm; combining the basic voltage control signal output by a voltage vector selection module with the three-phase compensation voltage, and performing PWM control on the motor; and repeatedly carrying out the steps until the motor rotary speed achieves the index. According to the rotary speed adaptive robust control method, the rotary speed estimation algorithm, the adaptive robust speed control algorithm, and the dead region compensation algorithm are adopted, so that the rapid, stable and reliable rotary speed control of the ultra-high-speed permanent magnet synchronous motor is effectively realized.

The present invention includes a reliable, configurable, compact, and low-cost linear electric motor controller for a vehicular heating ventilating and air conditioning (HVAC) system and methods of control. The controller features multiple input interfaces, specifically an interface for pulse width modulation control; an interface for discrete, stepwise control; and an interface for continuous variable control. The controller is implemented on an application-specific integrated circuit, and voltage to the electric motor is varied by a power metal-oxide semiconductor field-effect transistor (MOSFET).

A method of illuminating objects on a countertop surface using an automatically-triggered digital image capture and processing system installed thereupon, and having a single array of LEDs disposed behind the upper edge portion of its imaging window, above which a light ray blocking shroud portion is provided. During object detection, illumination and imaging operations above the countertop surface, typically at a retail point of sale (POS) station, visible illumination rays are generated by the LEDs and projected substantially within the field of view (FOV) of the system, while the light ray blocking shroud blocks a portion of illumination rays generated from the single array of LEDs and projected above and beyond the FOV of the system, and thus prevents such blocked illumination rays from striking the eyes of the system operator or nearby consumers during system operation.

A method and means by which a called telecommunications device (14), connected on an established PSTN telecommunications link (18) with a wireline data processing means caller telecommunications device (12), can initiate a conference call to be set up from the wireline caller device (12) by sending a command signal to the data processing means caller device (12). In response to the command signal, the data processing means caller device (12) executes a signal set, predetermined to cause the PSTN (18) to set up the desired conference link (20) at the caller end of the established link (18). The method can be applied by a called alarm monitoring facility (14) to obtain emergency assistance for a distressed wireline caller (12) by causing a conference link (20) with a caller local PSAP (16) to be set up automatically from the wireline caller device (12). In so doing, the method promotes the acquisition of needed emergency assistance in the least attainable time while accessing the best source of relevant emergency information.

A digital image capture and processing system including a housing having an imaging window; and an image formation and detection subsystem supporting a snap-shot mode of the operation and a video mode of operation. The system includes image formation optics for projecting a field of view (FOV) through said imaging window and upon an object within the FOV, and forming an image of the object on an area-type image detection array having a plurality of rows of image detection elements, and detecting 2D digital images of the object while object illumination and imaging operations. The system also includes an illumination subsystem, with an illumination array, for producing a field of illumination within the FOV, and illuminating the object detected in the FOV, so that the illumination reflects off the object and is transmitted back through the light transmission aperture and onto the image detection array to form the 2D digital image of the object. The digital image capture and processing system supports a presentation mode employing a combination of video and snap-shot modes of image detection array operation during a single cycle of system operation.

The invention discloses a navigation parameter acquisition method, system and device. The method comprises the following steps: initializing navigation parameters of a target vehicle by combining an inertial sensor and GPS; performing strapdown resolving on first operation data of the inertial sensor and updating current navigation parameters. The invention further discloses a vehicle sharp turn judgment method, system and device. The method comprises the following steps: acquiring real-time lateral acceleration of the target vehicle; acquiring navigation parameters of the target vehicle withthe navigation parameter acquisition method when the real-time lateral acceleration exceeds the lateral acceleration threshold value, and calculating an azimuth change angle and an attitude change angle; acquiring real-time vehicle speed when the azimuth change angle exceeds the azimuth change angle threshold and the attitude change angle does not exceed the attitude change angle threshold; judging whether the real-time vehicle speed exceeds a vehicle speed threshold; if yes, determining that the target vehicle turns sharply. Speed judgment and judgment accuracy are both taken into consideration, and finally, a judgment result about whether the target vehicle turns sharply can be obtained quickly and accurately.

An airplane wheel speed simulation device comprises a servo motor, a shifting fork, an airplane wheel hub, an airplane wheel speed sensor, a servo driver, a motion controller and a control box. The servo motor is arranged on the end face of one end of a cover plate, and the airplane wheel speed sensor is arranged on the end face of the other end of the cover plate. One end of a connecting sleeve of the shifting fork is arranged and fixed to a rotor moving shaft of the servo motor in a sleeved mode. The servo motor is coaxial with the shifting fork and the airplane wheel speed sensor. An output connection terminal of the servo driver is connected with an electrical socket of the servo motor through a cable. An input connection terminal of the servo driver is connected with a connection terminal of the motion controller through a cable. On the premise of not changing the work environment of the airplane wheel speed sensor and not damaging an original airborne equipment structure, real wheel speed signals are provided for a brake system, the development period is shortened, the development and test comprehensive level of the airplane wheel brake system is improved, and the airplane wheel speed simulation device has the advantages of being low in cost, high in efficiency, safe and reliable.

A method for determining the speed and position of a rotor of a salient-pole permanent magnet synchronous machine, the method comprising the steps of creating a voltage model (41) on a permanent magnet synchronous machine, forming a voltage reference (u_s,ref) for a stator of the permanent magnet synchronous machine, determining stator currents (is) of the permanent magnet synchronous machine, calculating a rotor angular speed (42) from the voltage reference (u_s,ref) and the stator currents (i_s) using the voltage model (41). The method further comprises the steps of forming with signal injection a position tracking signal (ε) of the rotor of the permanent magnet synchronous machine, forming a rotor angular speed estimate ({circumflex over (ω)}_m) from the calculated rotor angular speed (42) and the rotor position tracking signal (ε), forming a rotor position angle estimate ({circumflex over (θ)}_m) from the formed rotor angular speed estimate ({circumflex over (ω)}_m) and the rotor position tracking signal (ε).

The invention discloses a device and a method for measuring the rotating speed of a rotating object by adopting an electrostatic sensor. The method is as follows: a single electrostatic sensor electrode or double electrostatic sensor electrodes is/are arranged near a detected rotating part, and is/are used for sensing the rotation information of the rotating object at the position where the electrodes are positioned, the electrode of the electrostatic sensor is connected to a microprocessor in series via a single signal conditioning unit and a signal processing unit, electrostatic signals are amplified and filtered through the conditioning unit and are sent to the microprocessor through the signal processing unit, and relevant analytical calculation is carried out on the electrostatic signals through the microprocessor so as to obtain the rotating speed of the detected rotating object finally. Compared with the conventional rotating speed measuring device, the device is simple in structure, extremely low in cost and convenient to install, is not limited by the size dimension of a detected part and not easy to influence by environmental factors, belongs to noncontact measurement and has relatively high accuracy.

The invention discloses a measurement and control system for a miniature wind tunnel, and the system comprises a measurement system and a control system. The measurement system is used for collectingpreset data in a wind tunnel test section in real time, and then transmitting the preset data of the wind tunnel test section to the control system, wherein the preset data includes an atmospheric pressure value, a temperature value and a humidity value in the wind tunnel test section and a miniature differential pressure value at the front and rear ends of the wind tunnel test section. The control system is connected with the measurement system, and is used for receiving the preset data, sent by the measurement system, in the wind tunnel test segment, and then stores and displays the preset data in real time. The measurement and control system can accurately and reliably control the rotation speed of a wind turbine, enables the wind speed stability in the wind tunnel to be good, guarantees the reliable operation of a wind tunnel test, facilitates the popularization and application, and has great practical significance.

The invention relates to a PID neural network controller-based ultrahigh-speed permanent magnet synchronous motor rotating speed control method. The PID neural network controller-based ultrahigh-speedpermanent magnet synchronous motor rotating speed control method comprises structuring a double-closed-loop ultrahigh-speed permanent magnet synchronous motor control flow chart with a current innerloop and a rotating speed outer loop, wherein the rotating speed outer loop acquires actual rotating speed value through a rotating speed estimation module and generates control signals through a PIDneural network controller, and the current inner loop is provided with a PID regulator. The PID neural network controller structures a neural network model through static and dynamic functions and dynamically corrects neural network link weight through back-propagation algorithms, thereby achieving a learning and memory function and improving system self-adaptability. The PID neural network controller-based ultrahigh-speed permanent magnet synchronous motor rotating speed control method can effectively achieve reliable, rapid and stable rotating speed control of an ultrahigh-speed permanent magnet synchronous motor.

The invention aims to solve the problem that in the prior art, the adhesive tape running speed and the slip detection are inaccurate, and provides a voltage type adhesive tape running speed and slip detection device and a detection method. The device is composed of a fixing column, a tension spring, a movable arm, a transmission shaft, a passive friction wheel and a voltage type detection unit, wherein the fixing column is fixedly connected to a machine frame of an adhesive tape machine, the middle of the fixing column is hinged to one end of the movable arm, one end of the tension spring is fixed to the lower portion of the fixing column, the other end of the tension spring is fixed to the middle of the movable arm, the passive friction wheel is connected to the other end of the movable arm through the transmission shaft, the passive friction wheel is in frictional contact with the inner surface of an adhesive tape, the voltage type detection unit is fixedly connected to the movable arm, and is fixedly connected with one end of the transmission shaft. The device has the advantages that the speed of the adhesive tape is directly measured, the influence of slipping between a rollerand the adhesive tape on the speed of the adhesive tape is avoided, and the speed of the adhesive tape measured by the device is true and reliable.

A countertop-mounted digital image capture and processing system that includes a housing having an imaging window with an illumination-focusing lens component integrated therewithin. The area-type image formation and detection subsystem, also disposed in the housing, has image formation optics for projecting a field of view (FOV) through the imaging window and onto an area-type image detection array, for forming and detecting 2D digital images of an object in the FOV, during object illumination and imaging operations. The single array of LEDs is disposed immediately behind the illumination-focusing lens structure, for generating a field of visible illumination that reflects off an object within said FOV and is transmitted back through said imaging window and onto said area-type image detection array.