306 results about "Position detector" patented technology

The invention relates to the technical field of particle accelerators, in particular to a transverse feedback system with a switchable excitation direction and a control method thereof, and the system comprises a beam position detector BPM which is used for measuring a beam signal; the RF front end is used for receiving the beam signal sent by the beam position detector BPM and carrying out amplification and filtering processing; the ADC module is used for converting the beam signal into a digital signal; the digital signal processing module is used for carrying out digital signal processing calculation to obtain an excitation signal; the DAC module is used for carrying out digital-to-analog conversion; the power divider is used for adjusting the phase of the excitation signal; the exciter comprises four Kickers with electrodes, a power amplifier, a low-pass filter and a matched load and is used for applying a transverse excitation signal to the beam current, and the problems that in the prior art, a transverse feedback system Kicker occupies a large longitudinal space, the system is complex, and precision and efficiency are low are solved.

The inductive position detector includes: a stator having a wiring board; a rotor having a non-conductive component disposed in opposed relation to the stator and rotatable relative to the stator about a rotation axis; a conductor pattern held by the non-conductive component so as to have cyclicity (geometrical periodicity) circumferentially about the rotation axis, and movable to pass through a rotation track defined about the rotation axis as the rotor is rotated; and a plurality of chip inductors surface-mounted on a major surface of the wiring board of the stator in opposed relation to the rotation track so as to have different spatial phases with respect to the conductor pattern, and respectively serving as detection coils that detect a magnetic field change occurring due to the passage of the conductor pattern.

An electrical device for a rotational device of a human-powered vehicle comprises a force sensor, a position detector, and an electronic controller. The force sensor is configured to measure a force applied to the rotational device. The position detector is configured to detect a rotational position of the rotational device. The electronic controller is configured to adjust a measurement value of the force sensor based on the rotational position detected by the position detector.

The utility model provides a multi-axis shape and position error synchronous measuring device. The multi-axis shape and position error synchronous measuring device comprises a laser module, a light splitting steering system, a two-dimensional position detector A arranged on a sliding block of a first linear guide rail, a two-dimensional position detector B arranged on a sliding block of a second linear guide rail, and a two-dimensional position detector C arranged on a sliding block of a third linear guide rail, initial laser output by the laser module is divided into a first Y-axis collimated light beam, a second Y-axis collimated light beam and a third X-axis collimated light beam through the light splitting steering system, and the first Y-axis collimated light beam, the second Y-axis collimated light beam and the third X-axis collimated light beam enter the two-dimensional position detector A, the two-dimensional position detector B and the two-dimensional position detector C respectively. According to the utility model, multiple form and position errors such as parallelism and verticality between the guide rails can be measured at the same time through one-time measurement, one-by-one measurement is not needed, and the measurement efficiency is greatly improved.

The invention relates to a beam feedback system based on radio frequency direct acquisition, which comprises a beam position detector, a sum and difference device, a front-end processing module, a feedback processor and an amplification excitation module which are connected in sequence, the sum-difference device is used for determining a horizontal position signal, a vertical position signal and a longitudinal position signal of the beam bunch according to the position signal of the beam bunch, the front-end processing module is used for pre-processing the position signals of the beam bunch, and the feedback processor is used for sampling the pre-processed position signals of the beam bunch; the feedback module is used for receiving a beam bunch and generating a horizontal feedback signal, a vertical feedback signal and a longitudinal feedback signal of the beam bunch, and the amplification excitation module is used for amplifying the feedback signals of the beam bunch and acting the amplified feedback signals of the beam bunch on the beam bunch, so that the instability of the beam is inhibited.

The invention relates to a coarse-fine integrated pointing mechanism for optical communication, and belongs to the field of optical communication equipment. The problems that in the prior art, a coarse pointing mechanism and a fine pointing mechanism are separated, so that the size is large, and cooperative work efficiency is low are mainly solved. The technical scheme is characterized in that the coarse pointing function and the fine pointing function are integrated into a single compact structure, large-range coarse adjustment around an azimuth axis y1 is achieved through a rotary table on a base, and high-precision fine adjustment around a pitch axis x2 and an azimuth axis y2 is achieved through a reflector supporting frame and a reflector on a mounting piece; the first motor, the second motor and the third motor respectively drive; full-state sensing is performed through a multi-axis angle sensor, a light beam position detector and a temperature monitoring module; and the controller performs real-time thermal error feedforward compensation on the driving instruction of the fine pointing motor according to the temperature monitoring data and a pre-stored thermal deformation compensation model. The mechanism is mainly used in a free space optical communication system, and realizes rapid capture, high-precision alignment and stable tracking of light beams.

An outboard motor includes a steering mechanism including a pinion located in a central portion of an outboard motor body in a right-left direction and operable to rotate together with the outboard motor body, a rack operable to linearly move to rotate the pinion, and a rack position detector on a first side of the rack opposite to the pinion to detect a position of the rack.

The invention provides a button type signal feed-through for a beam position detector. The button type signal feed-through comprises a shell, a composite unit and an insulator. The composite unit comprises a button electrode and an inner conductor, and the button electrode is suitable for sensing an electromagnetic field signal generated by charged particle beams in the vacuum cavity; the inner conductor vertically and integrally extends from the center of the button electrode, a flange is arranged near one end, close to the button electrode, of the inner conductor, and the inner conductor is suitable for transmitting beam electromagnetic field signals. The insulator is sleeved on the inner conductor and comprises a first section cylinder and a second section cylinder, and the front end face of the first section cylinder is welded and fixed with the flange of the inner conductor; the second section of cylinder body extends outwards in the radial direction from the rear end of the first section of cylinder body, the circumferential outer surface of the second section of cylinder body is welded and fixed with the shell, and the insulator is suitable for fixed support and electrical insulation, so that smooth transition of transmission impedance and vacuum sealing are realized. The invention further provides a preparation method of the charged particle beam position detector and a charged particle beam position detector structure.

The invention provides a reciprocating tool and a method of controlling an electric motor of the reciprocating tool. One aspect of the present invention relates to a reciprocating tool comprising a reciprocating member, an electric motor, a transmission device, a control circuit, a drive circuit, a position detector, and a signal cut-off circuit. The drive circuit (i) receives at least one drive signal, and (ii) drives the electric motor in accordance with the received at least one drive signal. The position detector outputs a position detection signal whenever the reciprocating member reaches a predetermined position during at least one reciprocating operation. The signal cut-off circuit cuts off at least one drive signal for the drive circuit in response to the position detector outputting the position detection signal.

The disclosure improves the quality of seams in sewing using a sewing machine, and includes: a holder holding fabric; a driver being detachable from a bed of a sewing machine and driving the holder along an upper surface of the bed; a position detector detecting a position of a sewing needle of the sewing machine in an up-down direction; and a controller controlling driving of the holder, which is performed by the driver, based on a detection result of the position detector.

A sewing machine external unit includes: a holder holding fabric; a driver being detachable from a bed of a sewing machine and driving the holder along an upper surface of the bed; a pressing member moving in an up-down direction according to movement of a sewing needle in the up-down direction, pressing the fabric while the sewing needle is stuck in the fabric, and rising together with the sewing needle in response to the sewing needle coming out of the fabric and rising; a position detector detecting a position of the pressing member in the up-down direction; a signal output part outputting a signal to the sewing machine; and a controller outputting a needle drive signal for driving the sewing needle from the signal output part to the sewing machine, and controlling driving of the holder and / or the sewing needle based on a detection result of the position detector.

The invention discloses an automatic door opening and closing device of a dish-washing machine, the dish-washing machine and a control method, the automatic door opening and closing device comprises a shell, the shell is provided with a telescopic rod, and the telescopic rod telescopically moves between an extension position and a retraction position under the action of a driving mechanism; the telescopic end of the telescopic rod is provided with a lock catch mechanism for locking a lock hook on the machine door, and the shell is provided with a locking mechanism for locking the lock catch mechanism. And a position detector for detecting and positioning the telescopic rod is arranged on the shell. The position detector is installed on the automatic door opening and closing device to detect and position the extending position of the telescopic rod, so that the telescopic rod can stretch out and draw back to the initial position of the non-limiting position, and then the effect of step-by-step action of machine door closing and locking is achieved; the problems that the door cannot be opened smoothly due to too large locking force when the door is opened, and the lock catch mechanism is worn too much when the door is closed are solved.

The invention discloses a visible light positioning method based on a single light source base station and double photosensitive position detectors. The method comprises: constructing a visible light positioning system; defining a world coordinate system, a PSD coordinate system and a PSD imaging coordinate system; calibrating two PSD internal parameters in the visible light positioning system by using a Zhang Zhengyou calibration method and an asymmetric dot calibration plate; the world coordinates of the LED light source and the external parameters of the PSD are calibrated; and determining the real-time coordinates of the mobile carrier in the world coordinate system. The method has the advantages that the double PSD receivers and the single light source base station are used for positioning the mobile carrier, positioning coordinate calculation can be carried out as long as the mobile carrier loaded with the double PSD receivers is located in the coverage area of one light source base station, operation is safe, easy and convenient, the degree of dependence on the light source density is reduced, and the applicability of the visible light positioning technology is enhanced.

An optical image stabilization apparatus includes a first position detector and a second position detector configured to detect a position of a movable member relative to a base member in directions of first and second detection axes that are not orthogonal, a first driving unit and a second driving unit configured to drive the movable member relative to the base member in directions of first and second drive axes. The first or second detection axis is different from the first and second drive axes. An intersection of the first and second drive axes is closer to a center of gravity of a movable unit including an element fixed to the movable member among an optical element, the movable member, and the first and second driving units, than an intersection of the first and second detection axes.

An assistance system for an agricultural machine includes a position detector provided in or on the agricultural machine to detect a vehicle body position that is a position of the agricultural machine, a map creator configured or programmed to create an external map which indicates an external area outside the agricultural field and includes a periphery of the agricultural field, and an assistance device configured or programmed to assist the agricultural machine based on the vehicle body position detected by the position detector and based on the external map created by the map creator. The map creator is configured or programmed to create an internal map of an internal area of the field in addition to the external map to create an entire map of the inside of the field and the outside of the field.

The invention discloses a multi-mode nanometer measurement system and method based on terahertz scattering type scanning near-field optical microscopy and multi-frequency electrostatic force microscopy, and belongs to the technical field of near-field imaging, the measurement system comprises an AFM main body, a terahertz source, an optical path system, a terahertz detector, a multi-frequency signal generator and two phase-locked amplifiers; terahertz waves emitted by the terahertz source reach the terahertz detector through the optical path system, and near-field optical signals are obtained. The AFM comprises a metal coating probe; the multi-frequency signal generator generates sinusoidal signals with frequencies of omega1 and omega2; a sample is placed on the scanner, and the cantilever beam is controlled to vibrate at the frequency omega 1; an alternating voltage with the frequency of omega 2 is applied to a metal coating probe arranged at the top end of the cantilever beam; laser emitted by the laser is reflected to the light spot position detector through the cantilever beam, and morphology and electrostatic force signals are obtained through the two lock-in amplifiers respectively. According to the invention, a morphology signal, an optical signal and an electrostatic force signal can be synchronously obtained through single scanning.

A handheld scanning apparatus 100, comprising a body 110, a camera configured to scan images, two actuators 130, 140, each having a distal end projecting from a first end of the body, each distal end arranged to contact a surface, each of the actuators independently moveable relative to the body in dependence of the distance of the first end of the body from the surface, a position detector for determining the position of each of the actuators relative to the body, and an indicator for providing an indication of the position of the body relative to the surface. In this way, a user is provided with an indication as to whether or not they are holding the body at a desired position relative to the surface.

The utility model relates to the technical field of livestock breeding, and discloses a cowshed fence structure which comprises a fence body, the fence body comprises fixing columns arranged on the two sides, a telescopic fence assembly arranged between the fixing columns and a fence bottom plate arranged at the lower ends of the fixing columns, and detection rods are arranged at the two ends of the top face of the telescopic fence assembly. And a position detector is arranged on the inward side of the detection rod. Under the cooperation of the lead screw and the moving column, the fence top plate can drive the telescopic handrail to stretch out and draw back up and down, so that the height of the handrail can be adjusted according to actual needs, and animals are prevented from climbing out of the fence; the detection rod and the position detector are arranged at the two ends of the top face of the telescopic fence assembly, when an object moves outwards from the upper portion of the fence top plate, the position detector can give an alarm to a worker, the worker is reminded to observe whether a cow climbs over the fence or not in time, and therefore the worker does not need to observe the cow at any time, the workload is relieved, and the working efficiency is improved. And the working efficiency is improved.

A driving data notification system includes: a position detector configured to detect a position of a vehicle; a storage device configured to store driving data including position data of the vehicle detected by the position detector, and position data of a measurement point at which a lap time is measured; a processor configured to calculate the lap time based on the position data of the vehicle and the position data of the measurement point, in which the lap time calculated by the processor is to be stored in the storage device in a manner associated with the driving data, and a transmitter configured to transmit the lap time and the driving data stored in the storage unit to outside for causing the notification device to make a notification.

A stylus includes an integrated circuit, wherein the integrated circuit is configured to perform receiving, from a sensor controller of a position detector, a preamble signal generated by modulating a chip string with a defined code pattern of the preamble signal. After receiving the preamble signal, the integrated circuit performs receiving, from the sensor controller, a command signal generated by modulating a second chip string with data. The integrated circuit, by referring to a polarity of the preamble signal, decodes the data based on the command signal. The integrated circuit controls, based on the data, transmission of a signal to the position detector.

A 3D printer includes a frame, a carrier, a nozzle and a detection device. The carrier is fixed to the frame. The nozzle is movably disposed on the frame. The detection device includes a piezoelectric ceramic sheet and a position detector. The piezoelectric ceramic sheet is in contact with the carrier. The position detector is disposed on the nozzle.

Provided are a movable marking system, a method of controlling a movable marking apparatus, and a computer-readable recording medium. The movable marking system is a movable marking system that includes a movable marking apparatus, and includes: a data receiver, which receives a marking data; a driver, which supplies power to the movable marking apparatus and moves the movable marking apparatus; at least one sensor, which senses a space; a sensing condition setter, which sets a movement path along which the movable marking apparatus moves; and a position detector, which detects a position of the movable marking apparatus by comparing sensing data obtained through the sensor with a reference map data. The reference map data is generated from a drawing corresponding to the space or from a former sensing process, the movable marking apparatus comprises a receiver receiving position signal received from at least one transceiver, and the position detector determines the position of the movable marking apparatus using information obtained from a transceiver and / or a marker installed in the space, thereby improving positioning accuracy of the movable marking apparatus in real-world environments.

A belt sander includes a rotary unit, an oscillating unit, an abrasive belt position detector, a first sensor, a second sensor, and an electric motor control module. The rotary unit includes a retaining seat and an oscillating seat. A lower wheel is pivotally connected to the retaining seat. An upper wheel is pivotally connected to the oscillating seat. An abrasive belt is mounted on the upper wheel and the lower wheel. A recess is formed on the oscillating seat. The oscillating unit includes an electric motor, an eccentric bushing, and a bearing. The bearing is located in the recess. The electric motor drives the upper wheel to oscillate through the eccentric bushing and the bearing, and the abrasive belt is reciprocated left and right. The electric motor is controlled to run or stop running to achieve the function of automatically adjusting the oscillating position of the abrasive belt through the abrasive belt position detector, the first sensor and the second sensor.

A multifunctional feeding and discharging conveyor comprises a machine body and a conveying chain arranged in parallel on the machine body. A plurality of clamping blocks are arranged on the conveying chain in opposition. The multifunctional feeding and discharging conveyor comprises a feeding and discharging mechanism, a positioning mechanism and a foolproof mechanism. The feeding and discharging mechanism comprises a lifting assembly, a feeding plate and a discharging plate. The lifting assembly is arranged below the feeding plate or the discharging plate. The feeding plate and the discharging plate are lifted by the lifting assembly. The feeding plate and the discharging plate support materials. A plurality of clamping frames are arranged on the discharging plate. The positioning mechanism comprises a side pushing cylinder, a positioning cylinder, a horizontal pushing cylinder, a clamping plate and a position detector. The side pushing cylinder is arranged corresponding to the positioning cylinder and corresponding to the feeding plate or the discharging plate. The multifunctional feeding and discharging conveyor arranges the positioning mechanism and the foolproof mechanism to prevent mistakes in product installation, ensure accurate product transportation and assist in product code printing.

The invention provides a pi / 2 mode standing wave accelerating tube containing a beam position detector and a beam monitoring method. The pi / 2 mode standing wave accelerating tube containing the beam position detector comprises a plurality of radio frequency period units which are sequentially arranged in the axial direction, and each radio frequency period unit comprises four cavities which are sequentially a first accelerating cavity, a first coupling cavity, a second accelerating cavity and a second coupling cavity in the axial direction; axial acceleration electromagnetic fields are arranged in the first acceleration cavity and the second acceleration cavity and are used for accelerating the electron beam current; no axial acceleration electromagnetic field exists in the first coupling cavity and the second coupling cavity, and the first coupling cavity and the second coupling cavity are used for coupling power of adjacent acceleration cavities. A beam position detector is embedded in the cavity wall of the first coupling cavity and / or the second coupling cavity, at least one coupling cavity in each radio frequency period unit is provided with the beam position detector, and a beam pipeline of the beam position detector is collinear with the main axis of the pi / 2 mode standing wave accelerating tube and is used for monitoring the internal beam of the pi / 2 mode standing wave accelerating tube.

A position detector for a charged particle beam comprises high-voltage planes, a first single-axis detector, and a second single-axis detector. The first single-axis detector includes a first electrode set having first shapes in a first orientation, spatially distributed with respect to a first axis, and electrically connected to one another; and a second electrode set having the first shapes in a second orientation, spatially distributed with respect to the first axis, interleaved with the first electrode set, and electrically connected to one another. The second single-axis detector includes a third electrode set having second shapes in a third orientation, spatially distributed with respect to a second axis, and electrically connected to one another; and a fourth electrode set having the second shapes in a fourth orientation, spatially distributed with respect to the second axis, interleaved with the third electrode set, and electrically connected to one another.

The utility model discloses a full-automatic clamp for butterfly valve assembly. The full-automatic clamp comprises a base, a swing frame, a rotating table, a position detector and a control assembly. The swing frame can longitudinally swing relative to the base; a cavity used for containing a butterfly valve body is formed in the rotating table, and clamping jaws are movably arranged on the two sides of the cavity. The position detector is used for detecting the position of the mounting surface; the control assembly is connected with the position detector, the clamping jaw, the rotating table and the swing frame. According to the full-automatic clamp for assembling the butterfly valve, the swing frame, the rotating table on the swing frame and the position detector used for detecting the position of the installation face are arranged on the base, so that when a worker installs the valve clack, the rotating table can adjust the installation face to the proper position, then the swing frame swings to erect the valve clack body, and therefore the valve clack body can be conveniently installed. And after the rotating shaft is installed, the swing frame continuously swings in the reverse direction to enable the clamp to return to the initial position, and the problem that the worker needs to continuously and repeatedly find the installation face when assembling the butterfly valve is solved.

The information processing system includes a server and an electronic device. The electronic device includes a communicating unit; a position detector detecting a position; an information acquiring unit acquiring position information for each of a plurality of other electronic devices and error information that indicates an error in the position information; a determining unit determining whether the electronic device is surrounded by the plurality of other electronic devices, and determining whether the electronic device is in a specific state; and a transmission control unit transmitting correction information that includes the position and the position information to the server when the electronic device is determined to be surrounded by the plurality of other electronic devices and to be in the specific state. The server corrects the position of the electronic device based on the correction information.

The invention discloses a composite measuring head type locomotive wheelset size measurement system and a measurement method, relates to the field of online locomotive wheelset size measurement, and solves the problems that detection errors exist and the stability, the reliability, the measurement precision and the measurement efficiency cannot meet the application requirements when an existing wheelset measurement system carries out detection through the reference of equipment. The system comprises a Z-axis guide rail, a Y-axis guide rail, an X-axis guide rail, an industrial personal computer, a contact type scanning measuring head, a non-contact type laser locomotive wheelset position detector and a non-contact type laser displacement sensor. According to the invention, the non-contact laser displacement sensor and the contact type continuous scanning measuring head are adopted and are matched with the large-span three-dimensional moving guide rail and the grating ruler, so that total-factor and high-precision online detection of geometric dimensions and form and location tolerances after the locomotive wheelset is newly delivered and overhauled can be realized. The advantages of a contact type measuring system and a non-contact type measuring system are also taken in the aspect of detection efficiency, the axial displacement speed can reach more than 300mm / s, and the detection rhythm of the existing locomotive wheelset can be completely met.

A white light interferometer (1) comprises: an interference optics system (42); an image acquisition unit (52) that acquires an image of a measurement object (W) via the interference optics system (42); a movement mechanism (6) that moves the interference optics system (42) relative to the measurement object (W) in a vertical direction; an adjustment mechanism (43) that sets an optical path length of a reference light in the interference optics system (42);a position detector (723) that detects both a first position (Pa) and a second position (Pb) based on images acquired by the image acquisition unit (52) and which have different height positions of the interference optics system (42) relative to the object being measured (W), wherein the first position (Pa) is a height position of the interference optics system (42) in which a luminance value (Lt) of a target pixel reaches a peak value, and the second position (Pb) is a height position of the interference optics system (42) in which a contrast value (C) reaches a peak value; and a setting amount calculator (724) that calculates a setting amount of the setting mechanism (43) based on a deviation amount (ΔP) between the first position (Pa) and the second position (Pb).