40results about How to "Speed increase or decrease" patented technology

The invention discloses an adaptive vehicle anti-collision method. A plurality of vehicle speed parameters, vehicle distance parameters and braking distance parameters at different driving types are pre-established by a control system of a vehicle, longer vehicle distances are set when the vehicle speeds are higher, the vehicle distances are increased or decreased appropriately according to different road conditions, sensors on the vehicle obtain dynamic information, such as the vehicle speeds or accelerations, analysis is performed by combining driving behaviors, a driver is classified into a certain driving type through statistical analysis and an artificial neural network, control parameters of the vehicle are adjusted by referring to the driving type of the vehicle driver, and thus an electronic control unit of the vehicle can perform warning or control to brake in an appropriate time in accordance with the driving habits of the driver. By adopting the adaptive vehicle anti-collision method, the problem that the safety vehicle distance and a brake device cannot be adjusted by an anti-collision system of the existing vehicle by aiming at different vehicle speeds, road conditions, habits of the driver or vehicle conditions is solved.

The invention provides a continuous and mechanical variable valve timing adjusting device for an internal combustion engine, belonging to the technical field of internal combustion engines. The device comprises a crankshaft, a cam shaft, a cam, a driving gear, an intermediate gearing, an input center gear, a planet gear, a planet gear carrier, an output center gear and an adjusting device, wherein the front end of the crankshaft is installed at the axle center of the driving gear; the intermediate gearing is meshed with the driving gear and an outer gear ring of the input center gear respectively; the planet gear is meshed with an inner gear ring of the input center gear and the output center gear respectively; the front end of the cam shaft is installed at the axle center of the output center gear; and the adjusting device is connected with the planet gear carrier by a connecting shaft. In the working process of the device, when the planet gear carrier rotates in a certain direction,the rotating speed of the output center gear is increased or decreased, thus changing the rotation phase between the cam shaft and the crankshaft and realizing adjustment of valve timing. The device has reasonable design, simple structure, good reliability and higher adjustment precision and is easy to add on the original engine.

The invention discloses a precise control method of a linear motion module. A motion control method based on S-shaped speed curve planning and synchronous planning of parabolic functions is adopted to precisely control the linear motion module; an acceleration maximum value and a speed maximum value of each motion shaft of a truss manipulator are input; an initial pose and a target pose of the truss manipulator are given to obtain a displacement variation of each motion shaft of the manipulator; time function nodes of each motion shaft are calculated; longest time nodes are selected as unified planning nodes to calculate actual maximum speed and maximum acceleration of each motion shaft; displacement, speed and acceleration functions at an acceleration phase, a deceleration phase and a constant-speed phase are respectively calculated according to the actual maximum speed and the maximum acceleration of each motion shaft; and the displacement of each motion shaft or discrete points on speed curves are output. The method can prevent the manipulator vibration or noise problem caused by sudden change of the speed or the acceleration, guarantees the motor motion precision, and can control the motion trajectory.

A computer heat radiation module consists of host shell, monitor unit for collecting system operation information and for controlling operation mode of heat radiation module, the first heat radiation fan and the second heat radiation fan. It is featured as enabling to automatically start up and to speed up the first or the second heat radiation fan when temperature-rise of said system is detected by monitor module and enabling to realize optimum balance between wind amount and noise value of said fans by carrying out parameter-setting with monitor module.

The invention relates to a tension control system and a control method for multi-wire cutting of silicon wafer. The system comprises a tension detecting and controlling device and a tension regulating device, wherein the tension detecting and controlling device comprises a tension detecting and controlling main unit, left and right tension detecting devices, a paying-off signal terminal and a takeup signal terminal; the tension detecting and controlling main unit is composed of a main control computer and an analog quantity I/O (Input/Output) acquiring card; the left and right tension detecting devices, the paying-off signal terminal and the takeup signal terminal are connected with the detecting and controlling main unit. The tension control method for the multi-wire cutting of the silicon wafer performs detecting and controlling by adopting the tension control system for the multi-wire cutting and comprises the steps of: applying signal voltage to the signal terminals of a takeup pulley and a paying-off pulley; detecting that whether the tension signal is up to a set tension value or not, if not, returning to the first step; starting the pulley to rotate if the tension is up to the set value; and detecting the changes of the tension signal and driving the tension regulating unit to carry out the tension regulation at the same time. The system and the method disclosed by the invention have the advantages that: through the programmed control by a computer, the tension fluctuation of the cutting wire is decreased and the accuracy and the reliability of the tension control of the multi-wire cutting are greatly increased.

The invention provides A Vehicle speed control system and method of operating same. The system comprises an operating unit for automatically causing a vehicle to operate in accordance with a target speed value; a receiving unit which receives information relating to movement of a portion of a body of an occupant relative to the vehicle; and a device which automatically adjusting value of target speed according to hte information. The operating unit for automatically causing a vehicle to operate in accordance with a target speed value includes an electric-controller, which is configured to automatically operate the vehicle at the target speed; the receiving unit which receives information relating to movement of a portion of a body of an occupant relative to the vehicle includes the electric-controller, which is configured to receive the electric-signals, that a part of body of the passenger moves relative to the vehicle.

The invention provides a continuous variable valve timing adjusting system for an internal combustion engine, belonging to the technical field of internal combustion engines. The system comprises a crankshaft, a cam shaft, a cam, a driving gear, an intermediate gearing, an input center gear, a differential gear, a differential gear carrier, an adjusting center gear and an adjusting device, wherein the front end of the crankshaft is installed at the axle center of the driving gear; the intermediate gearing is meshed with the driving gear and an outer gear ring of the input center gear respectively; the differential gear is meshed with an inner conical gear ring of the input center gear and the adjusting center gear respectively; the differential gear carrier passes through a differential gear sleeve and is connected with the cam shaft into a whole; and the adjusting device is coaxially connected with the adjusting center gear. In the working process of the system, when the adjusting center gear rotates in a certain direction, the rotating speed of the differential gear carrier is increased or decreased, thus changing the rotation phase between the cam shaft and the crankshaft and realizing adjustment of valve timing. The system has reasonable design, simple structure, good reliability and higher adjustment precision and is easy to add on the original engine.

The invention relates to a crosslapper used for formation of a fleece made of many layers of fibrous web. The crosslapper comprises at least one continuously revolving input belt (2) which supplies the fibrous web (3) from the inlet region of the crosslapper up to a laying gap (11) of the laying carriage, and a continuously circulating cover belt (7) which fixes the fibrous web (3) on the input belt (2). The crosslapper is characterized in that the cover belt (7) fixes the fibrous web (3) from the inlet region of the crosslapper (1) up to the laying gap on the input belt(2).

The invention discloses a universal connecting device for rotating a pipeline. The universal connecting device comprises an output angle adjusting assembly, the fixed end of the output angle adjustingassembly is fixedly connected to the output end of a rotating direction adjusting assembly, the input end of the rotating direction adjusting assembly is connected with an input angle adjusting assembly, and the lower end face of the rotating direction adjusting assembly is fixedly connected with a fixing frame. A driven pipeline and a driving pipeline are connected with the universal connectingdevice in a through mode, after liquid in the pipelines flows through the universal connecting device, the flow direction is changed, the deviation angle can be adjusted according to the needs, usingis convenient, the transmission axis direction can be changed while the flow direction of the liquid is changed, and transmission is conveniently conducted by using the pipelines. Through the rotatingdirection adjusting assembly, a circuit is controlled to be opened and closed, the rotating direction of the driven pipeline can be controlled freely, and the application range is further expanded. By changing the ratio of the inner diameter of a second outer gear to the diameter of a center gear to the inner diameter of a rotating ring, the rotating speed of the driven pipeline is increased or decreased.

This vehicle control device is provided with: a recognition unit that recognizes the position of a nearby vehicle traveling in the vicinity of a host vehicle; a respective-lane-speed specification unit that specifies a first vehicle speed related to a vehicle travelling in a lane in which the host vehicle is traveling and a second vehicle speed related to the nearby vehicle traveling in a lane which is a lane-change destination of lane change to be performed by the host vehicle; a target position setting unit that sets a lane-change target position on the lane-change destination lane on the basis of a comparison result between the first vehicle speed and the second vehicle speed; and a control unit that causes the host vehicle to move to the target position by lane change.

The invention discloses an oil pressure adjusting type friction plate capable of realizing oil film thickness micro adjustment. The oil pressure adjusting type friction plate comprises a friction plate base plate, an elastic body and an oil pressure sensor; the friction plate base plate is of an annular shape, and an annular groove is coaxially formed in the friction plate base plate; the elasticbody covers the position, above the groove, of the friction plate base plate, and the elastic body and the groove form a sealed oil filling cavity; the elastic modulus of the elastic body is smaller than the elastic modulus of the friction plate base plate; the friction plate base plate is provided with an oil inlet communicating with the oil filling cavity, and the oil inlet is connected with anoil cylinder through an oil pipe; and the oil pressure sensor is used for detecting oil pressure borne by the elastic body. According to the friction plate, the thickness of an oil film is adjusted byutilizing the friction plate, so that mechanical transmission is simplified, and micro accurate adjustment of the thickness of the oil film is realized.

The invention relates to the technical field of ultrasonic ranging. The invention further discloses an ultrasonic range finder for ocean depth measurement. The ultrasonic range finder comprises a caisson; a sliding rod is arranged in the caisson; the surface of the sliding rod is slidably connected with a gravity block; a pressure-sensitive switch is arranged on the side surface of the gravity block; the side surface of the gravity block is rotationally connected with a screw rod; conical shafts are arranged above a meshing wheel; fans are rotationally connected with the opposite sides of thetwo conical shafts; a magnetic toothed plate is slidably connected with the bottom of a water baffle; a cam is connected with the bottom of the magnetic toothed plate in a meshed mode; an ejector rodis slidably connected with the surface of an inner wheel of the cam; an extrusion toothed rod is slidably connected to the side face of the ejector rod; and a water passing wheel is connected with theside face of the extrusion toothed rod in a meshed mode. According to the ultrasonic range finder for ocean depth measurement, through cooperative use of the sliding rod and the gravity block, the effect of preventing an ultrasonic transmitter from moving away from the original position when undercurrent occurs is achieved.

A method (10) of providing power support to an electrical power grid (2) is provided. The power support is provided by an arrangement (3, 4) comprising a synchronous machine (4) connected to a converter (3), the converter (3) in turn being connected to the electrical power grid (2). The method (10) is performed in a control device (5) controlling the arrangement (3, 4) and comprises: receiving (11) feedback from one or both of the electrical power grid (2) and the synchronous machine (4), and controlling (12) the converter (3) such that power support is provided to or absorbed from the electrical power grid (2) by means of the synchronous machine (4) based on the received feedback. A control device (5), an arrangement (3, 4), a computer program and computer program products are also provided.