474 results about "Current velocity" patented technology

A system and method of visual monitoring of a work implement (e.g., a welding torch) while a task is being performed (e.g., forming a welding joint) to train workers (e.g., apprentices, inexperienced workers) in proper welding technique, for example) and/or to evaluate the worker's use of a particular work implement (e.g., to determine if the welding torch was held in a desired relationship to the items being welded together, determine if the welding torch formed the joint at the current speed, etc.). In general, one or more cameras may acquire images of a target secured to and/or formed on the work implement. The images may be analyzed to provide feedback to the user, to be evaluated for weld integrity purposes; and/or may be used to compare the performance of a task (e.g., forming a welding joint) with a database of one or more profiles made by experienced and/or expert craftsmen.

A method and system for monitoring speed of a vehicle moving along a road that includes risk zones. The method determines: road conditions for each risk zone; a threshold speed of each risk zone based on the road conditions and on a distance to a posted speed limit within a high risk zone; a geographical position of the vehicle, a current risk zone in which the vehicle is moving based on the stored geographical position of the vehicle; and a current speed of the vehicle moving in the current risk zone which exceeds the threshold speed of a particular risk zone, resulting in performing a subsequent action (triggering an alarm within the vehicle, presenting a message to a driver in the vehicle, and/or automatically regulating the speed of the vehicle). The action is specific to the particular risk zone and dependent on the road conditions.

A navigation device includes a computer platform that includes a global positioning system (GPS) receiver operable to acquire and track a GPS signal, a processor assembly, and a memory. The memory includes at least one of last recorded Ephemeris and Almanac information, and a GPS velocity vector determination module operable to generate a velocity vector output in the absence of current Ephemeris based upon the tracked GPS signal and the last recorded GPS information. A method of vehicle navigation in the absence of current Ephemeris includes acquiring and tracking a GPS signal, retrieving from a memory a last recorded location of a vehicle, setting a dead reckoning startup location equal to the last recorded location, retrieving from a memory at least one of a last recorded Ephemeris and Almanac, determining a current velocity vector and determining a current location based upon the velocity vector and the dead reckoning startup location.

Airflow rates within a ventilation system are controlled using motor speed or torque and motor electric current or pressure. Fan speed or torque may be varied to compensate for differing restriction in ductwork, and may provide a constant airflow rate over a range of varying airflow restriction. Air handlers or air conditioning units may be mass produced in common configurations, and installed in different buildings or structures with different ductwork configurations. Methods operate a fan motor at a present speed or torque, sample speed or torque, sample current of the fan motor or pressure within the ventilation system, calculate a present airflow rate within the ventilation system, calculate a new input setting using the present airflow rate and a target airflow rate, change the speed or torque to the new input setting, and repeat these steps to converge on the target airflow rate, often avoiding overshoot.

Systems and methods for positioning one or more spread elements of a marine seismic spread are described. One system comprises a seismic vessel-mounted acoustic Doppler current meter adapted to ascertain at least the horizontal component of the current velocity vector at a point ahead of the seismic vessel, and one or more controllers adapted to use the ascertained current velocity vector to control position of one or more seismic spread elements. It is emphasized that this abstract is provided to comply with the rules requiring an abstract, which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

A driver assistance or collision avoidance system is adapted for use with trailing and preceding host vehicles, and in a preferred embodiment includes a preceding vehicle speed sensor for determining the current speed of the preceding vehicle at a point; a vehicle-to-vehicle communication sub-system; a normal speed determining sub-system operable to determine the normally expected speed of the preceding vehicle at the point, and including an exterior remote vehicle sensor or digital map-indicia database; and a controller configured to compare the current and normally expected speeds, and the discrepancy there-between to a threshold, and cause an alert to be generated only when the discrepancy exceeds the threshold or an otherwise stalled condition is determined.

Systems and methods are operable maintain a proscribed Self Separation distance between an unmanned aircraft system (UAS) and an object. In an example system, consecutive intruder aircraft locations relative to corresponding locations of a self aircraft are determined, wherein the determining is based on current velocities of the intruder aircraft and the self aircraft, and wherein the determining is based on current flight paths of the intruder aircraft and the self aircraft. At least one evasive maneuver for the self aircraft is computed using a processing system based on the determined consecutive intruder aircraft locations relative to the corresponding locations of the self aircraft.

Disclosed is a method of simulating a dynamic object comprising a plurality of vertices. The method comprises defining a current position and a current velocity for a vertex “V” among the plurality of vertices, generating an estimated next position for vertex “v” based on the current position and current velocity, updating the estimated next position based on a plurality of constraints, and after updating the estimated next position, computing a next position and a next velocity for vertex “v” based on the current position and estimated next position.

An underwater apparatus for generating electric power from ocean currents and deep water tides. A submersible platform including two or more power pods, each having a rotor with fixed-pitch blades, with drivetrains housed in pressure vessels that are connected by a transverse structure providing buoyancy, which can be a wing depressor, hydrofoil, truss, or faired tube. The platform is connected to anchors on the seafloor by forward mooring lines and a vertical mooring line that restricts the depth of the device in the water column. The platform operates using passive, rather than active, depth control. The wing depressor, along with rotor drag loads, ensures the platform seeks the desired operational current velocity. The rotors are directly coupled to a hydraulic pump that drives at least one constant-speed hydraulic-motor generator set and enables hydraulic braking. A fluidic bearing decouples non-torque rotor loads to the main shaft driving the hydraulic pumps.

Speed limit indicators and methods for determining speed, the relevant speed limit, and displaying same make it easy for the driver of a vehicle to compare his current speed with the legal limit for the location in which he is traveling. This eliminates the need for the driver to take his eyes off the road to look for speed limit signs, thereby reducing the chance of an accident, and resolves any confusion that might exist as to what the current legal limit is. An audible warning of excessive speed reduces the amount of time the driver needs to spend examining the speedometer.

The invention discloses a mobile terminal having an auxiliary positioning function and a method. The mobile terminal comprises a global positioning system (GPS) module, a gyroscope, an accelerometer and a microprocessor, wherein the GPS module, the gyroscope and the accelerometer are respectively connected with the microprocessor. By the mobile terminal having the auxiliary positioning function and the method provided by the invention, angular speeds and angles of the mobile terminal around an X axis, a Y axis and a Z axis are tested by using the gyroscope; the forward acceleration of the mobile terminal is measured by the accelerometer, and the current speed of the mobile terminal is calculated; and according to initial longitude and latitude coordinates, an initial altitude and an initial current speed, which are acquired by the GPS module, the final longitude and latitude, the final altitude and the final forward speed of the mobile terminal are calculated, so when a GPS signal is abnormal, the function of continuously positioning and navigating the mobile terminal is realized, a user cannot feel the change of GPS application functions completely, and a good use experience effect is achieved.

The invention relates to a vehicle intersection collision early warning method. Firstly, the position, direction, track radius, speed and acceleration information of a local vehicle and a target vehicle is collected; the driving trajectories and the collision point of the local vehicle and the target vehicle are calculated according to the position, direction and track radius information, and a collision area is calculated according to the collision point; whether the time from driving into the area to driving out of the collision area of the local vehicle and the time from driving into the collision area to driving out of the collision area of the target vehicle are overlapped or not is judged, when the two times are overlapped, the time T needed by the driving into the collision area of the local vehicle with a current speed and acceleration is calculated, and if the time T is smaller than a set value, the early warning result of alarm is executed. According to the scheme, the problems that a collision position is not accurate, the estimated time deviation of arriving an intersection is large and a lot of wrong alarms exist in the prior art are solved.

The invention provides wearable ultrasonic guiding equipment. The wearable ultrasonic guiding equipment comprises a plurality of ultrasonic wave receiving and transmitting units, a plurality of mounting brackets, a walking parameter detection module, a road condition analyzing and automatic alarm parameter regulating module, an alarm module and a power supply module, wherein the plurality of ultrasonic wave receiving and transmitting units are used for transmitting ultrasonic waves and receiving ultrasonic echo waves reflected by a barrier; the plurality of mounting brackets are used for mounting the ultrasonic wave receiving and transmitting units and worn on corresponding body parts of a blind user; the walking parameter detection module is used for acquiring walking parameters of the blind user; the road condition analyzing and automatic alarm parameter regulating module is used for judging the existence of the barrier in the front and the change of ground flatness and acquiring barrier meeting time when the blind user is walking at a current speed through the walking parameters; the alarm module is used for sending barrier existence information and corresponding alarm information to the blind user; and the power supply module is used for supplying power to each module. The device can liberate two hands of a blind person when the blind person is walking, can fully detect the barriers in front of the body of the blind person and the ground and makes an early alarm by using an audio signal which represents the time when the blinder user meets the barrier when the blinder user is walking at the current speed, so that the walking safety of the blinder person is ensured.

The invention discloses an energy-saving control method for concrete transportation pump, according to the status request of the construction site, and the matching relation of load pressure PL and the engine power in central control unit, the rotating speed ne of engine and the oil pump current I are calculated preliminarily, the control signal of engine speed ne is send to the chassis engine of concrete transportation pump through central control unit, the rotating speed is adjusted in closed-loop according the current speed feedback from chassis engine to make the current speed n is same with the set rotating speed ne; the chassis engine transmits the power to oil pump through the transmission mechanism (transfer case), the control of current I in oil pump is completed by: the central control unit sends signals to oil pump directly, the oil pump transmits the power of chassis engine to the hydraulic pressure system to realize the control of concrete transportation pump working process. The invention can adjust the engine rotating speed timely and the control mode of oil pump displacement according the requirements of actual working condition to adapt various power occasions, reduce fuel consumption and improve the operating efficiency.

A method for controlling an operation of a wind turbine with at least one structural component is provided. A fatigue life time consumption of the structural component is scheduled. A current velocity of a wind which is driving the wind turbine is determined. A current set point value for the fatigue life time consumption of the structural component based on the scheduled fatigue life time consumption of the structural component is specified and a maximum set point value for the fatigue life time consumption of the structural component based on the determined current wind velocity is specified. The wind turbine is operated depending on the specified current set point value and/or on the specified maximum set point value such that a mechanical load acting on the structural component is controlled. A machine load control system and a wind turbine are also provided.

A system and method for analyzing traffic flow comprises receiving location reports from a plurality of mobile devices, each of the location reports identifying a current location and current speed for a particular mobile device. For each of the location reports, the system identifies a current street from a street mapping database using the current location. The system stores the current speeds for the mobile devices so that each of the current speeds is associated with a street in the street mapping database. The current speeds may be stored in the street mapping database or in a separate database that is linked to the street mapping database.

The invention relates to a spline real-time interpolation method which comprises the following steps: carrying out the spline segment preprocessing on a processing program to obtain the curve length and catastrophe point information; carrying out speed planning according to the curve length and the catastrophe point information to obtain the processing speed; according to the obtained processing speed to calculate the coordinates of the next point, and outputting the coordinates to a servo control device, wherein the spline segment preprocessing is as follows: an input processing program: setting the initial speed of the current curve segment; according to the error restraining, accelerated speed restraining and jerk restraining, planning the current speed; if the planned current speed is a catastrophe point, adding the catastrophe point into a catastrophe group; working out the coordinates of the next interpolation point; if the program is ended, outputting the processed result to a real-time interpolation module, and reading in the next segment of the processing program; and returning to the step of setting the initial speed of the current program segment. The invention can ensure that each interpolation period can output one reliable interpolation point in real time, and can obtain a speed-down point with high precision, has good interactivity and can response the trimming operation in real time.

A control method for the dispersion S-shaped curve speed of a mechanical arm includes the following steps that firstly, the operation speed of the mechanical arm is segmented into multiple speed sections, and the minimum speed value (shown in the specifications), the maximum speed value (shown in the specifications), the minimum acceleration (shown in the specifications), the maximum acceleration (shown in the specifications) and the jerk (shown in the specifications) of the current speed section are determined; secondly, the mechanical arm modifies the maximum speed value in the practical control process with the time period T as the speed planned period; and thirdly, speed control is divided into the acceleration stage, the constant speed stage and the speed reduction stage, real-time speed planning is conducted, the mechanical arm is accelerated in an S-shaped curve manner with the minimum speed (shown in the specifications) as the initial speed, and when the system position pulse sending time t is larger than or equal to the speed planned period T, in other words, t is larger than or equal to T, one time of speed planning operation is conducted. By means of the control method, stability of movement is effectively improved; and meanwhile, in two-axis synchronous movement control, the speed synchronization error can be compensated for in real time, and the control precision can be effectively improved.

The invention relates to a variable-diameter-tube drilling fluid rheology measuring method which is especially suitable for on-line detections of in situ drilling fluid rheology. The method comprises steps that: a variable-diameter-tube system is composed of 2 to 20 segments of tubules with different diameters, wherein the tubules are connected in series; a stable flow rate is provided for the variable-diameter-tube system by using a constant flow pump and a buffer; current velocities in different diameter segments of the variable-diameter-tube system are calculated according to the flow rate and the cross section areas of the tubules; velocity gradients in different diameter segments are calculated according to the current velocities and diameters of the different diameter segments of the variable-diameter-tube system; pressure losses in different diameter segments of the variable-diameter-tube system are detected by using a differential pressure gauge; shear stress values of the different diameter segments of the variable-diameter-tube system are calculated according to the pressure losses; and rheology parameters such as plastic viscosity, dynamic shearing force, flow pattern index, and consistency coefficient of the measured drilling fluid can be calculated according to the shear stress values under different velocity gradients. With the method provided by the invention, drilling fluid rheology and variation conditions thereof can be measured in real-time without changing the flow rate.

There is provided an apparatus and method for guiding a traffic information in a navigation system, in which a user of a moving object directly selects and provides traffic conditions changing on a current traveling road in real time. Additionally, the user can receive the traffic conditions. The method for guiding the traffic information in the navigation system includes the steps of: displaying a traveling route on a screen; determining whether a current mode is a traffic condition input mode while a moving object travels; if the current mode is the traffic condition input mode, displaying a current traffic condition on a screen in order for a selection; checking whether or not the current traffic condition is selected on the displayed screen; and if the traffic condition is selected, transmitting a traffic information message to a traffic information center, the traffic information message including the selected traffic condition, a current position and a current velocity.

A method and system for navigation of a motor vehicle with reference to current traffic conditions in an area are presented. The navigation of the motor vehicle includes transmitting signals by a signal transceiver to a navigation unit in the motor vehicle, the signals include at least (a) current velocity information of sampling vehicles in the area or (b) current positional information of the sampling vehicles in the area; computing by the navigation unit at least one of the current velocity information and the current positional information to provide a reference value; and issuing by the navigation unit a warning of a traffic incident in the area if the reference value is smaller than a predetermined value.

The invention provides a damping method of a fiber option gyroscope (FOG) strap-down inertial navigation system, mainly comprising the following steps: acquiring the initial attitude of a carrier by initial alignment; measuring angular velocity input and acceleration input on a carrier coordinate system; calculating an initial attitude matrix; converting carrier-system acceleration output into platform-system acceleration; acquiring all current velocity and angular velocity values; conducting horizontal damping on velocity information; calculating the attitude angular velocity of the carrier to a mathematics platform system; updating the current attitude matrix with quaternion numbers; outputting a carrier attitude angel; and entering the next time cycle. The invention adds suitable horizontal damping in a velocity information position of a horizontal loop of the system to eliminate the Shura periodic oscillation and the Foucault periodic oscillation of the system and adds a suitable directional damping network in an earth angular velocity input information position to eliminate the earth 24-hour periodic oscillation of the system, thereby improving the accuracy of a ship strap-down inertial navigation system.