6884results about How to "Avoid shock" patented technology

Work light has LEDs that require heatsink. Desired radiation pattern achieved by using optical components designed to produce beam or LEDs may have beams in different directions. Radiation pattern of LEDs may be changed by refractive-reflective optics or by convex lenses. Convex lenses may be hemispheres, other planoconvex shapes, concavo-convex shapes, or other shapes. Curved surfaces on any lenses may be spherical or aspheric. Ballast to operate the LEDs from line voltage AC or low voltage DC. Work light may contain batteries. The work light may be mounted on a stand. May have accessory mount. May have charging station. May have a paging transmitter to activate a paging receiver in work light. May have openings for heat transfer from heatsink to ambient air external to light.

Work light has LEDs that may require heatsink. Desired radiation pattern achieved by using optical components designed to produce beam or LEDs may have beams in different directions. Radiation pattern of LEDs may be changed by refractive-reflective optics or by convex lenses. Convex lenses may be hemispheres, other planoconvex shapes, concavo-convex shapes, or other shapes. Curved surfaces on any lenses may be spherical or aspheric. Ballast to operate the LEDs from line voltage AC or low voltage DC. Work light may contain batteries. The work light may be mounted on a stand. May have accessory mount. May have charging station. May have a paging transmitter to activate a paging receiver in work light. May have openings for heat transfer from heatsink to ambient air external to light.

Footwear providing enhanced protection against extreme landing impacts includes a sole having an elastomeric mid-sole with elastomeric pads combined in a heel recess thereof such that the pads act in series with each other and in parallel with the mid-sole during conjoint compression thereof. At least one of the pads includes a solid gel having a relatively high damping coefficient. In another embodiment, the heel of the mid-sole is replaced by a toroidal gas cushion and an elastomeric pad including a solid gel having a relatively high damping coefficient disposed in a central recess of the cushion such that the pad is recessed a selected distance below the upper surface of the cushion. The resilient pads may advantageously incorporate a plurality of gas-filled cells, and a solid gel pad may also be disposed in the mid-sole of the footwear below the ball of the wearer's foot for increased protection.

The invention discloses a combined vibration damper of a screw drill complete machine test-bed and a manufacturing method thereof. The combined vibration damper comprises a vibration attenuation base which comprises a loading system base, a first clamping system base and a second clamping system base, wherein the loading system base is arranged on an equipment foundation in a rigidity way; the first clamping system base and the second clamping system base are connected into a whole through a bolt and are arranged on the equipment foundation through a rubber vibration attenuation block; an interval of 30-50 mm is reserved between the loading system base and each clamping system base; the first clamping system base and the second clamping system base are respectively internally provided with a plurality of cubic cavities with an equal size; the volume of each cubic cavity is 0.1-0.2 cubic meter; discrete type balance weight sand is respectively filled into the cubic cavities, and the filling efficiency is 80-90 %; and the weight of the balance weight sand is 25-35 % of the total weight of the whole device. The test-bed is capable of restraining resonance and testing precisely in the testing process by the combined vibration damper, and the usage precision of surrounding working devices is not affected.

Transducer assembly for an ultrasound probe including a transducer array having transducer elements and an acoustic window attached directly to the transducer array such that the transducer array and the acoustic window form an integral unit. The acoustic window includes a layer of elastomer optionally covered on upper and lower surfaces by impervious polymer layers. An ultrasound probe, such as a transesophageal echocardiographic probe, a transnasal probe, a transthoracic probe, an intracavity probe and an intraoperative probe, including the transducer assembly in a cavity of the housing or nose is also disclosed.

The invention relates to the field of exercise equipment, in particular to an intelligent running machine. The intelligent running machine comprises a running machine body, a tablet personal computer which is arranged on the running machine body, a flexible array pressure sensor which is arranged on the running machine body, a control module which is arranged on the tablet personal computer, a data acquisition module and a motor drive module. An internet function is integrated in the control module of the running machine, and each running machine uploads a relationship model and a training program which are established according to individual characteristics through network to a server for storage so as to realize identity authentication. Multiple kinds of training modes and virtual scenes are integrated in the control module; the training program which meets an exerciser is customized in a personalized way; foot pressure distribution information of the exerciser, which is detected bythe flexible array pressure sensor, and the real-time heart rate which is sent by a heart rate monitoring module are received in real time; running speed, gradient and the like can be adjusted automatically; safety of the exerciser can be guaranteed; and training modes can be enriched and training efficiency can be improved.

The invention discloses a transitional tracking planning method applied by an industrial robot, which can realize the transition between a joint space track and a cartesian space track, and the transition between two tracks of the cartesian space, the transitional track between different movement tracks are planned under the cartesian space, and has an intuitive shape; by adopting the algorithm that two parabolas are fused into one transitional curve, the smoothness of the track, speed and acceleration can be ensured, and the curve shape is controllable; the transitional track is formed by six independent curves, and the transition can be realized on the track with only posture change without position change; from the engineering application angle, the path velocity of transitional track boundary is restrained by utilizing the included angle between the tracks and the system allowable chord error, the boundary posture rotation speed is restrained by the similar mode, so that the large impact on a mechanical system caused by overhigh engagement speed can be prevented.

The invention discloses a method for self-adaptive subsection interpolation of NURBS curve under the real-time look-ahead whole-process accelerated and decelerated control. The NURBS curve is presented by a matrix form and is pre-processed; the self-adaptive speed adjusting arithmetic is adopted for the NURBS curve, thus obtaining the parameters meeting the interpolation precision requirement such as feeding speed and the like; the curve is segmented at all maximum curvatures of the curve; speed planning is carried out on all the segmented curves by an S-curve accelerated and decelerated control method, thus obtaining the changing time of the speed curve at all accelerated and decelerated stage; according to the interpolation period and the changing time of all accelerated and decelerated stage, the feeding speed of all interpolation periods and coordinates of corresponding interpolation points are obtained; and according to the coordinates of the interpolation points and the feeding speed, the control signal given value is generated. The invention can realize the look-ahead processing of the NURBS curve during the whole interpolation process, leads the real-time interpolation process to be quick and effective, leads the whole interpolation movement process to be smooth and stable, has wide applicable range and has important significance to the development of the high-speed high-precision numerical control system.

In order to provide a walking assistance device capable of favorably providing an assisting force for maintaining the upright posture while reducing the sense of pressure when worn by the user, a hip support member (1) of the walking assisting device, which comprises an assisting force generator (hip joint actuator 10) disposed at least on a side of a hip joint to provide an assisting force to a movement of a lower limb, is provided with: a back support (4) equipped with pads (18, 19, 20) for respectively abutting an intermediate portion between right and left erector spinae muscles, lateral outer sides of the spinae muscles and right and left iliac crests; and a belt (5) connected to the back support for tightening a lower part of the rectus abdominis muscle. In this way, a supporting force can be provided to the lumbar vertebrae to steadily keep the upright posture while reducing a resistance to a bending movement of the waist caused by the support member. Further, the drive torque from the assisting force generator can be supported by the whole hip portion and this can contribute to preventing inadvertent move of the support member.

The invention relates to an electric vehicle orderly charging control method. The method comprises the following steps of accounting and calculating the charging load predicting results at the next time frame as per the history data or the charging demand of the conventional electric vehicle by station level management equipment and uploading the charging load predicting results to an electric fence administration center, calculating the available capacity of an electric fence as per the predicting results at the present time frame and the real-time operation state and sending electric fence available capacity command to the station level management equipment by the electric fence administration center, comparing the charging power demand of the present time frame by the station level management equipment and coordinating the charging demand of the electric vehicle if the charging demand of the electric vehicle is smaller than the charging power demand of the present time frame. The invention further relates to an electric vehicle orderly charging control system. The allowance power of a recharge replacement station is restricted reasonably by the electric fence administration center as per the charging load predicting results submitted by the station level management equipment and the operating condition of the electric fence, thereby avoiding the impact to the electric fence caused by power requirements of the recharge replacement station and coordinating the energy source requirements of the electric fence load and the electric vehicle better.

The invention discloses an air conditioner indoor / outdoor unit cleaning method. The method comprises the steps of: controlling a heat exchanger to be cleaned to enter a self-cleaning mode; adjusting the operation frequency of an air conditioner, the openness of a throttling device and the rotating speed of a fan corresponding to the heat exchanger to be cleaned, and controlling the evaporation temperature of the heat exchanger to be cleaned to keep in a preset range to condense the surface of the heat exchanger to be cleaned; condensing the heat exchanger to be cleaned by t1 time; detecting if the high / low pressure difference of the air conditioner reaches preset conditions; controlling a four-way valve to change the direction to perform the defrosting switching of indoor and outdoor heat exchangers when the high / low pressure difference of the air conditioner reaches the preset conditions; and adjusting air conditioner operation parameters when the high / low pressure difference of the air conditioner dose not reach the preset conditions, and then, controlling the four-way valve to change the direction to perform the defrosting switching of the indoor and outdoor heat exchangers when the high / low pressure difference of the air conditioner reaches the preset conditions. As the direction change of the four-way valve can be controlled through detecting if the high / low pressure difference of the air conditioner reaches the preset conditions, the higher shock on the compressor caused by excessive high / low pressure difference of the air conditioner can be prevented.

The invention provides a microgrid and microsource control method based on a virtual synchronous electric generator. The method comprises the following steps of building a mechanical equation and an electromagnetic equation of the virtual synchronous electric generator, carrying out microsource active control through active adjustment of the virtual synchronous electric generator, carrying out microsource reactive control through reactive adjustment of the virtual synchronous electric generator and achieving seamless switching between different operating modes of a microgrid. The microgrid and microsource control method based on the virtual synchronous electric generator has the active and reactive adjustment capacity similar to that of the synchronous electric generator, can simulate the inertia and the damping characteristic of the synchronous electric generator, can overcome the impact on a power grid from inertialessness of a traditional grid-connected inverter, and can effectively improve the capacity of the power grid to accept the renewable energy sources.

The invention relates to a real-time digital simulation model for a multi-infeed direct current power transmission system. The real-time digital simulation model comprises a plurality of equivalent super-voltage direct current power transmission systems which are connected in parallel, wherein the super-voltage direct current power transmission systems comprise a primary system real-time digital simulation model and a secondary system real-time digital simulation model; the primary system real-time digital simulation model comprises a convertor station and a direct current power transmission circuit, wherein the convertor station is arranged on the two ends of the direct current power transmission circuit; the secondary system real-time digital simulation model comprises a convertor station control system and a protective system, wherein the convertor station control system and the protective system are connected with the convertor system, and are used for controlling and protecting the operation of the convertor station. The operation of the convertor station is controlled and protected by the convertor station control system and the protective system, so that a plurality of direct current simultaneous faults and a plurality of direct current faults which are easily caused by alternating current system fault are avoided, and the impact to the alternating current system in a fault recovery process is avoided.

The invention relates to a traversing spiral discharge device for a stock bin and a discharging method. The traversing spiral discharge device comprises a round stock bin, wherein the round stock bin is fixed at the top of a mounting base; a feeding opening is formed in the center of the top of the round stock bin; an access door is arranged on a side edge of the feeding opening; a pressure relief cone cover is mounted inside the round stock bin; a primary rotating motor is mounted inside the pressure relief cone cover; the primary rotating motor and a transmission case are connected with each other and drive a spiral shaft to rotate along the axis of the spiral shaft; a discharging opening is formed in the bottom of the round stock bin; a rotational transmission system is fixedly mounted on a mounting base on the side edge of the discharging opening; the rotational transmission system drives the spiral shaft to conduct 360-degree rotational motion along the axis of the round stock bin. The traversing spiral discharge device is capable of facilitating material delivery, effectively preventing a charging basket from being blocked, boosting discharge efficiency, ensuring discharge safety and reducing the intensity of manual operation.

The present invention provides an intersection condition-orientated unmanned vehicle trajectory planning method based on the Bezier curve and the VFH algorithm. The method includes the following steps that: 1) the starting point pose P0 (x0,y0,theta0) and destination point pose P3 (x3,y3,theta3) of current trajectory planning are acquired; 2) a trajectory cluster A1 from the starting point pose P0 (x0,y0,theta0) to the destination point pose P3 (x3,y3,theta3) is generated through adopting a three-order Bezier curve model; 3) the trajectory cluster A1 is screened according to a maximum curvature constraint, so that a trajectory cluster A2 is obtained, collision detection is performed on A2, so that a collision-free trajectory cluster A3 is obtained; 4) if A3 is not empty, an optimal trajectory is selected from A3 according to a trajectory smoothest principle and is outputted to a control layer, and the method is terminated, otherwise, the method shifts to step 5; 5) a movement region in the original VFH algorithm is improved, so that a fan-shaped movement region is built; 6) obstacle information is utilized to establish a grid map; 7) the fan-shaped movement region is divided into a plurality of fan-shaped regions, and whether an obstacle exists is judged; 8) the Bezier curve is used in combination, and optimal trajectory points are selected; and 9) with a discrete point set generated in the step 8 adopted as control points, a B-spline curve is generated, and the B-spline curve is adopted as the final trajectory of an unmanned vehicle.

There is provided an occupant protection device. An airbag device includes an airbag that is stored in a center pad of a steering wheel of a vehicle and is expandable toward an occupant side upon a collision of the vehicle. The center pad is disposed to have a non-rotating structure independent from the steering wheel. The airbag includes a first extension portion and a second extension portion which are disposed at opposing edges of the airbag in a width direction of the vehicle and are expandable to extend toward a rear side of the vehicle.

The invention discloses a grid-connected non-networking micro-grid system and a control protection method thereof. On the premise of basically not changing the structure of the original power distribution system, multiple types of distributed power sources, such as wind power generation system, photovoltaic power generation system, cell accumulation system and the like, are connected into a common power grid along with user loads through AC buses, and reasonable load layout and active energy management are utilized to implement grid-connected non-networking of the micro-grid system. By using the structural design and the active energy management of the micro-grid central control unit, the new energy power generation system can be completely self-sufficient, and does not reversely transmit power to the common power grid, thereby avoiding impacting the normal power supply of the common power grid; and meanwhile, by the aid of the common power grid, the user loads have higher power supply reliability and electric power quality.

The invention discloses a fault reconstruction method for a simple redundancy flight control system of a long-endurance unmanned aerial vehicle. The redundancy is formed for the measurement of key navigation information by using two devices of main and backup sensors on the basis of the non-similarity principle, and two redundancies are guaranteed on an execution mechanism, so that the simple redundancy flight control system is formed. A comparison is made between information of the main sensor and the information of the backup sensor; when the times of the deviation of the information of the main and backup sensors greater than the threshold in unit time are more frequency, one sensor is broken down; the fusion is implemented through other normal navigation information for locating the broken device; and when one execution mechanism is broken down, the influence of the broken mechanism is complemented through the rest normal execution mechanisms to guarantee the flight safety.

A magnetic sensor-type antenna comprising a magnetic core and a coil wound around the magnetic core for receiving electromagnetic waves, which is disposed in a housing such that the end portion of the magnetic core is bent away from the housing or a metal portion of the housing, and a timepiece, a keyless entry system and an RFID system each comprising such an antenna.

A polarizing optical element comprises a transparent optical base element and a layered structure that incorporates a polarizing film. The polarizing film is of the dichroic dye type and is oriented uniaxially. The layered structure is bonded to the optical base element by means of a layered structure that includes at least one layer of a pressure-sensitive adhesive. Thanks to the use of pressure-sensitive adhesive, the polarizing film during the bonding operation maintains a high polarization efficiency and an optical quality compatible with many applications of the optical element, especially ophthalmic applications.

The method comprises: the user supporting P2P requests the route system to get the first request message of first file downloaded by the first client side; determining the network autonomous system of first client side; RRS searches a edge server ES-P that saves the first file and supports P2P in the network autonomous system, and returns at least on ES-P address saving the first file to the first client side; according to the request for downloading the first file from client side and the correlated relation between the client side and the first file saved in the ES-P, said ES-P returns the information about other client side that are downloading the first file.

The invention discloses a target detection and recognition method based on deep learning. A model is built by utilizing a caffe platform in a Linux system, and consists of convolution layers, pooling layers, RPN layers, an ROIs layer, an ROI Pooling layer, fully-connected layers, a Sparse PCA layer and prediction window and prediction category output layers. A multi-RPN-layer fusion strategy is provided by the invention, and the detection capacity for a target of each scale is enhanced; the new Spares PCA layer is added between the two fully-connected layers, and the accuracy is guaranteed while the computational amount is reduced; and lastly, a logarithmic suppression method is provided for target location prediction, and a target location regression algorithm is improved. Finally, the purpose that the detection speed is accelerated while the detection precision is guaranteed is achieved. The method realizes accurately and quickly detecting and recognizing the targets of interest, and has a great application value.

In a method of making a control arm for a wheel suspension of a motor vehicle a blank of steel material having a tensile strength of at least 800 MPa is shaped, using a sheet metal forming process, into a shell body having a center web and plural flank portions extending from the center web in a same direction. The flank portions are connected by a latticed reinforcement made of plastic, without application of a heat treatment process.