135results about How to "Accurate movement speed" patented technology

The invention provides a self-adaptive ultrasonic imaging method for inhibiting tissue flicker, and a device thereof. The method and the device transmit ultrasonic pulses to an object to be detected, receive ultrasonic echo signals from the object to be detected, process the ultrasonic echo signals so as to obtain tissue image data, process the ultrasonic echo signals so as to obtain audio signals, process the audio signals so as to obtain blood-flow image data, and display the tissue image data or the blood-flow image data according to fusion rules, wherein a first fusion rule is adopted forthe parts with tissue flicker in the object to be detected; a second fusion rule is adopted for the parts with no tissue flicker in the object to be detected; and the first fusion rule differs from the second fusion rule. The method and the device can effectively weaken and even eliminate the tissue flicker caused by various tissue movements in ultrasonic imaging systems.

The invention provides automatic paint spraying equipment for a blank of an elevator guide rail. The automatic paint spraying equipment is characterized by comprising a feeding frame and a receiving frame; the feeding frame and the receiving frame are arranged on the same straight line; traction chain wheels, traction chains connected with the traction chain wheels and power sources for driving the traction chain wheels are arranged on the feeding frame and the receiving frame; a pusher is arranged on the traction chain of the feeding frame, and a lifting frame is arranged below the traction chain of the feeding frame; a flexible self-centering guiding mechanism and a lifting frame roller are arranged on the lifting frame; a support mechanism is arranged on the traction chain on the receiving frame; and a spraying center is arranged between the lifting frame and the support mechanism. According to the automatic paint spraying equipment, blade plates on two sides of the front side of a guide rail are sprayed by a spray gun in a static mode; and the bottom surfaces of the guide rail blade plates are subjected to roll coating and brush coating, so that the elevator guide rail serving as the blank is sprayed and brushed on three surfaces at a time. By the automatic paint spraying equipment, the spraying environment is improved, the motion speed of guide rail workpieces is constant during spraying, the spraying is accurate and quick, the floor area is small, the efficiency is improved, and the stability of the quality is ensured.

The invention provides a K-band microstrip patch antenna array, which belongs to the field of antennas. The dielectric board is provided with three columns of antennas parallel to each other and with the same structure, which are respectively transmitting antennas, first receiving antennas and second receiving antennas; the antennas of each column There are several microstrip antenna units, several 1/4 wavelength microstrip feeders, power dividers and feed ports; there are several impedance converters, several microstrip transmission lines and several feeder bending lines in the power divider ; The bottom of the dielectric plate is provided with a metal grounding plate; the invention designs a K-band microstrip array antenna with stronger anti-interference ability, so that the detection of moving objects is more accurate.

In a magnetic disk storage apparatus, when power supply is stopped, a magnetic head can be retracted safely and quickly so as not to be damaged. There are provided a back electromotive a force detector that detects back electromotive forces developed in coils of a voice coil motor for moving a magnetic head when power a supply is stopped, and a brake controller that judges a movement speed of the magnetic head from the detected back electromotive forces, and brakes the voice coil motor when the movement speed is greater than a preset first limited speed.

The invention discloses a multi-base station frequency shift synthesized positioning method for a mobile terminal. The positioning method uses the own Doppler effect of the mobile terminal to synthesize the Doppler effects produced by multiple base stations relative to the mobile terminal to acquire a kinematic parameter of the mobile terminal, and further acquire the position, moving speed and moving direction of the mobile terminal by combining cell information, thereby implementing continuous and dynamic positioning of the mobile terminal. The positioning method is scientific and reasonable.

The present invention relates to a drive control device for thermal massage therapy machine on the therapeutic bed. It is technically characterized by that on the mobile carriage a thermal massage therapy machine with ceramic bal land massage rod is mounted. Besides, said invention utilizes a control mode capable of changing pulse amplitude to control reducing motor to regulate movement of said mobile carriage, and at the same time utilizes the rotating speed of said reducing motor to control and regulate massage speed.

In a baseband processing circuit unit, a reception signal type determination unit determines whether or not a reception signal in a GPS reception unit is an indirect wave. A movement speed calculation unit calculates a movement speed of the GPS reception unit using a correction coefficient of a relative speed determined in accordance with the determination of whether or not the reception signal is an indirect wave, a transmission frequency of a GPS satellite signal and a reception frequency in the GPS reception unit.

The embodiment of the invention discloses a method and device for controlling a vehicle. According to the specific embodiment, the method comprises the following steps of determining center points ofat least two frames of point cloud acquired for an identified obstacle in a vehicle driving process; carrying out curve fitting based on the determined at least two center points to obtain a fitting curve; based on the fitting curve, determining the moving speed of the obstacle; according to the moving speed of the obstacle, the driving speed of a vehicle and the distance between the obstacle andthe vehicle, predicting whether the vehicle can collide with the obstacle or not if continuing driving at current speed; and sending control information to the vehicle in response to the prediction that the vehicle can collide with the obstacle if continuing driving at the current speed, wherein the control information is used for controlling the vehicle to avoid collision with the obstacle. According to the embodiment, the influence of the shape change of the obstacle on the normal driving of an automatic driving vehicle is reduced, and the driving safety of the vehicle is improved.

An image forming apparatus has: an image forming section that forms a toner image corresponding to image information; an intermediate transfer belt, which is an endless belt stretched between a plurality of rollers and traveling between the plurality of rollers, the toner image being transferred to a surface thereof or a recording sheet placed on the surface thereof; a driving roller, which is one of the plurality of rollers and drives the intermediate transfer belt; a bending roller, which touches an outer circumferential surface of the intermediate transfer belt and presses and bends the intermediate transfer belt in an inner circumferential direction; and a speed detecting part which detects a movement speed of an outer circumference of the intermediate transfer belt by measuring a rotational speed of the bending roller.

A bionic eye for intelligent robot features that the transparent liquid is used as its main carrier to realize lens function and control the fucus variation.

The invention discloses a road congestion monitoring system based on vehicle feature matrix sequence change analysis, which relates to the technical field of road traffic and solves a technical problem of traffic condition detection. The road congestion monitoring system based on vehicle feature matrix sequence change analysis comprises a clock driving subsystem GTS, a video information acquisition subsystem CAVS, an initial mark subsystem MS, an image feature extraction subsystem TS, a congestion monitoring analysis subsystem BAS and an alarming subsystem AS; the clock driving subsystem GTS is used for generating a time sequence, the video information acquisition subsystem CAVS is used for capturing the image of a camera area CA according to the received time sequence, and the initial mark subsystem MS is used for segmenting the camera area CA into a plurality of independent area lanes MR; the image feature extraction subsystem TS is used for extracting vehicle features from the image; the congestion monitoring analysis subsystem BAS is used for performing congestion analysis according to the image of the camera area and the segmented area lanes; and the alarming subsystem AS is used for performing early warning timely according to a result of congestion analysis. The system provided by the invention is used for monitoring the road traffic conditions.

The invention discloses an equivalent friction coefficient measurement device and method of a rolling bearing. The equivalent friction coefficient measurement device comprises a machine body, an air floating main shaft assembly, a core shaft, a sliding table, a bearing block, a rotating speed sensor and a data acquiring/processing/calculating/displaying system. The air floating main shaft assemblycomprises an air floating main shaft base body and an air floating main shaft. The air floating main shaft base body is fixedly connected with the machine body. The core shaft is fittingly connectedwith the air floating main shaft through a conical surface. The inner ring of a to-be-tested rolling bearing is arranged on the shaft shoulder of the core shaft. The outer ring of the to-be-tested rolling bearing is installed on the retaining shoulder of the bearing block. The bearing block is fixedly connected with the sliding table. The sliding table is capable of horizontally moving along the axial direction of the air floatation main shaft under the guiding effect of a guide component. The data acquiring/processing/calculating/displaying system is used for acquiring and processing the angular velocity signals of the core shaft or the air floating main shaft monitored by the rotating speed sensor, and then calculating the equivalent friction torque and the equivalent friction coefficient of the to-be-tested rolling bearing. The measurement device has the capability of rapidly and precisely measuring the equivalent friction torque and the equivalent friction coefficient of the rolling bearing.

The invention provides a rotating shaft direction and rotating angular velocity resolving method for a moving rotating object, which comprises the following steps of: firstly, registering an adjacentpoint cloud at the moment by using a nearest point iteration point cloud registration algorithm, and constructing a local track matrix by using a registration matrix; secondly, point position information is obtained according to a local track matrix, point track fitting is carried out, the speed of a certain point at a certain moment is solved, and finally an equation is established according to the rigid body rotation physical process to carry out rotation parameter resolving; according to the method, dependence on feature points is avoided, and the motion condition of a target at a certain moment is described by using a local track matrix; good robustness is achieved on point cloud local loss caused by self-shielding of the target, and errors caused by incomplete feature point tracks inthe sequence point cloud are avoided; the method can effectively solve the rotating shaft and the rotating angular velocity, especially when the angular velocity of the rotating object is variable motion, the solving result can better track the change of the set angular velocity, the solving precision is higher, and the solving advantage is more obvious.

The invention relates to a booster bicycle provided with a sensor with a plurality of unevenly distributed magnetic blocks on a chain disc, and in particular relates to an electric booster bicycle used for providing booster signals for a plurality of point positions in a way of magnetic induction. The sensor comprises a sensing element, a booster model processor, a digital/ analog (D/ A) converter and an operational amplifier which are sequentially connected, wherein the chain disc taken as the sensing element is fixedly provided with the plurality of permanent magnet blocks, and every two adjacent permanent magnet blocks have the opposite magnetic polarities; the distances among the permanent magnet blocks are different from one another; a Hall of the sensing element is arranged on a frame close to the permanent magnet blocks; and the operational amplifier is connected with a motor controller. The booster bicycle has the advantages that square-wave signals can be obtained by the Hall, the sensor can conveniently use an artificial set booster model through digital processing output, the boosting is reasonable in the starting point, the finishing point and the force, human can cooperate with a machine, and the electricity is saved.

The invention relates to a traction electromagnet capable of precisely controlling displacement quantity, which is used for solving the problem of positioning an object in traction. The technical scheme is as follows: the electromagnet and a control circuit thereof constitute a closed loop control system, wherein the control circuit consists of a signal acquisition circuit, a single-chip microcomputer and a driving circuit, the signal acquisition circuit consists of a photoelectric sensor and a comparator, a light emitting tube and a photoelectric tube of the photoelectric sensor are respectively positioned on two sides of an armature of the electromagnet, two input ends of the comparator are respectively connected with an output signal and reference voltage of the photoelectric sensor, and an output end is connected with an INTO end of the single-chip microcomputer; the input end of the driving circuit is connected with a P1.7 end of the single-chip microcomputer, the output end drives a coil of the electromagnet; and a plurality of equidistant inspection holes are formed on the armature of the electromagnet along the direction of an axial line. The device takes motion parameters as closed loop control objects, thereby leading the object in the traction to acquire precise motion velocity and further implementing the precise positioning of the object in the traction.

The invention discloses a sensor with a plurality of magnet blocks adjustable in position and magnetic flux in a shell, belonging to the technology of providing a control signal via multi-point-position magnetic induction. The sensor comprises a sensing component, a power-assisted model processor, a digital-analogue converter and an operational amplifier which are sequentially connected, wherein the sensing component comprises permanent magnet blocks and a Hall sensor in inner hollows embedded in a rotating disc and a fixed disc, a plurality of the annularly-distributed permanent magnet blocks are fixedly arranged on the rotating disc, the distances among the permanent magnet blocks and the magnetic fluxes of the permanent magnet blocks at different positions are adjustable, and the magnetic polarities of the adjacent permanent magnet blocks are opposite, that is, the magnetic polarities are distributed by alternately arranging N-poles and S-poles; and the Hall sensor on the fixed disc is arranged at a position close to the permanent magnet blocks. The sensor has the following advantages that: the Hall sensor can obtain a rectangular wave signal via the NS distribution of the magnetic poles, and the rectangular wave signal can participate in digital processing for setting the power-assisted model; and the rectangular wave signal can show the positions of the permanent magnet blocks on the rotating disc and determine the purposes of different rectangular waves by virtue of the difference of the distances and the difference of the magnetic fluxes, and the relative positions of the permanent magnet blocks and the Hall sensor are fixed, so that signal output is reliable.

The invention provides a system and method for multi-target movement speed measurement under complex paths, and belongs to the field of physical movement speed measurement. The system comprises an acceleration measurement module, a wireless gateway and an upper computer, wherein the acceleration measurement module comprises an acceleration sensor, a controller and a wireless transceiving module; the acceleration sensor is connected with the controller; the controller is connected with the wireless transceiving module; the wireless transceiver module is connected with the wireless gateway through a wireless network; the wireless gateway is connected with the upper computer. According to the system, the real-time precision movement speed of a plurality of athletes under the complex paths such as straight lines, curves and retracing can be conveniently and quickly obtained, coaches and the athletes are assisted in effectively evaluating the movement state and technical actions of the athletes in real time, and data support is provided for evaluating the effect of a specific training method and making a further training plan.

The invention relates to a booster bicycle provided with a sensor provided with a plurality of magnetic blocks with unevenly distributed magnetic fluxes in a shell, and in particular relates to an electric booster bicycle used for providing booster signals for a plurality of point positions in a way of magnetic induction. The sensor comprises a sensing element, a booster model processor, a digital/ analog (D/ A) converter and an operational amplifier which are sequentially connected, wherein the sensing element comprises the permanent magnet blocks and a Hall which are respectively arranged in a space where a rotary table and a fixed table are embedded; the rotary table is provided with the plurality of permanent magnet blocks, and every two adjacent permanent magnet blocks have the opposite magnetic polarities and different magnetic fluxes; the Hall arranged on the fixed table is arranged at the position close to the permanent magnet blocks; the sensor is sheathed outside a centre shaft of the bicycle; and the operational amplifier is connected with a motor controller. The booster bicycle has the advantages that the relative positions between the permanent magnet blocks and the Hall are fixed, square-wave signals can be obtained by the Hall, the sensor can conveniently use an artificial set booster model through digital processing output, the boosting is reasonable in the starting point, the finishing point and the force, human can cooperate with a machine in a best way, and the electricity is saved.

The invention discloses an assisted bicycle using a sensor with non-uniform distribution of multiple magnetic blocks in a housing, and belongs to an electric assisted bicycle capable of providing assisting signals by multi-point magnetic induction. The sensor comprises a sensing element, an assisting model processor, a digital-analog converter and an operational amplifier, which are sequentially connected, wherein the sensing element comprises a rotating disk and a fixed disk, permanent magnets and Halls are arranged in internal space, a plurality of the permanent magnets, which have the opposite magnetic polarities in the adjacent permanent magnets and can regulate the intervals and the positions with different magnetic fluxes, are arranged on the rotating disk, and the Halls on the fixed disk are arranged in the positions near the permanent magnets. The sensor is sheathed outside a center shaft of the bicycle, and the operational amplifier is connected with a motor controller. The assisted bicycle has the advantages that the relative positions of the permanent magnets and the Halls are fixed, and the Halls can obtain rectangular wave signals, so that the sensor can conveniently output an assisted model which is artificially set and can be regulated by digital processing to realize reasonable start point and end point of assisting, as well as reasonable force, enable a person and a machine to realize optimal matching and save electricity.

The invention discloses a multi-magnetic block position-adjustable turntable sensor for an assisted bicycle, and belongs to the technology of providing a control signal by performing multi-point magnetic induction. The multi-magnetic block position-adjustable turntable sensor for the assisted bicycle comprises a sensing element, an assistance model processor, a digital-to-analogue converter and an operational amplifier which are connected in sequence; the sensing element is a plurality of permanent magnet blocks with adjustable space which are arranged on a turntable; the magnetic polarities of adjacent permanent magnet blocks are opposite, namely the distribution way is pole N, pole S, pole N, ellipsis; and a Hall element is arranged at the position close to the permanent magnet blocks. The multi-magnetic block position-adjustable turntable sensor for the assisted bicycle has the advantages that the Hall element can acquire square-wave signals by utilizing the NS opposite distribution way of the magnetic polarities of the adjacent permanent magnet blocks, and digital processing of the signals is facilitated; the square-wave signals can represent the positions of the permanent magnet blocks on the turntable by adjusting the distance among the permanent magnet blocks, and the application of different square waves are determined; and the sensor can output control model electric signals which are matched with the movement position of the permanent magnet blocks and are set artificially.

The invention discloses a passive spring hemming assembly, which is in contact with the plate body to be hemmed of the automobile, and includes a bracket, the upper part of which is provided with a flange top cover connected with a mechanical arm, and the lower part is hinged with the bottom plate through a first hinge; a spring buffer , which is arranged between the flange top cover and the bottom plate; a cylinder, which is arranged between the spring buffer and the bottom plate, and the upper part of the cylinder is connected with the lower part of the spring buffer , the cylinder has an inner space for accommodating the guide rod, the upper end of the guide rod is in conflict with the spring buffer; the first rolling body is arranged on the lower part of the bottom plate, and the first rolling body includes multiple rollers of different shapes. The invention has the advantages of stable rolling force, simple debugging, low cost and the like.

The invention discloses a sensor with a plurality of magnet blocks adjustable in position in a shell, belonging to the technology of providing a control signal via multi-point-position magnetic induction. The sensor comprises a sensing component, a power-assisted model processor, a digital-analogue converter and an operational amplifier which are sequentially connected, wherein the sensing component comprises permanent magnet blocks and a Hall sensor in inner hollows embedded in a rotating disc and a fixed disc, a plurality of the annularly-distributed permanent magnet blocks are fixedly arranged on the rotating disc, the distances among the permanent magnet blocks are adjustable, and the magnetic polarities of the adjacent permanent magnet blocks are opposite, that is, the magnetic polarities of all the permanent magnet blocks on one surface of the rotating disc are distributed by alternately arranging N-poles and S-poles; and the Hall sensor on the fixed disc is arranged at a position close to the permanent magnet blocks. The sensor has the following advantages that: the Hall sensor can obtain a rectangular wave signal via the NS distribution of the magnetic polarities, and the rectangular wave signal can participate in digital processing for setting the power-assisted model; and the rectangular wave signal can show the positions of the permanent magnet blocks on the rotating disc, and determine the purposes of different rectangular waves by virtue of adjustment on the distances among the permanent magnet blocks, and the relative positions of the permanent magnet blocks and the Hall sensor are fixed, so that signal output is reliable.

The invention relates to a sensing element provided with a plurality of magnetic blocks with adjustable positions in a shell, belonging to a technology for providing control signals by multi-point magnetic induction. The permanent magnet blocks and a Hall are respectively arranged in a space where a rotary table and a fixed table are embedded; the rotary table is fixedly provided with the plurality of permanent magnet blocks which are distributed in a circular ring shape, and the gaps among the permanent magnet blocks can be adjusted; the every two adjacent permanent magnet blocks arranged on one surface of the rotary table have the opposite magnetic polarities, namely, the magnetic polarity distribution mode of all the permanent magnet blocks on one surface of the rotary table is N pole, S pole, N pole, and so on; and the Hall arranged on the fixed table is arranged at the position close to the permanent magnet blocks. The sensing element has the advantages that the every two adjacent permanent magnet blocks are distributed in the opposite magnetic polarities (NS), and square-wave signals can be obtained by the Hall, so that digital processing can be conveniently carried out on the signals; the positions of the permanent magnet blocks on the rotary table can be shown by the square-wave signals by adjusting the distances among the permanent magnet blocks, so that the usage of the different square-wave signals can be confirmed; and the relative positions between the permanent magnet blocks and the Hall are fixed, so that the signals can be reliably output.