434 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.

A system and method are provided for determining a location of a laser using a diffraction grating. The system includes a lens that projects diffraction patterns from the diffraction grating as an image of diffraction peaks onto a plane. Optical sensors then sense the diffraction peaks. A processor connected to the optical sensors applies a laser position determination method to determine the laser location. In the method, the processor obtains the diffraction peak measurements from the optical sensors and applies a transform to arrange the diffraction peaks into a grid of regularly spaced peaks. The processor then applies convolution kernels to analyze the grid of regularized peaks to to determine a position of a zeroth order diffraction central peak that is used to calculate the angle of incidence of the axis of the laser beam to determine the laser position.

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 utility model belongs to the technical field of printer auxiliary equipment, and relates to a glass flat printer which comprises a width gauge, a first guide limiting piece, a clamping centering device, a second guide limiting piece, a position detector and a uv printer which are sequentially and linearly installed on a supporting and conveying main body, and a monitoring system is installed on the side, away from the position detector, of the uv printer. The width gauge is erected at the end of the supporting and conveying body, and the supporting and conveying body, the width gauge, the clamping and centering device, the position detector, the uv printer and the monitoring system are all in communication connection with the control cabinet. According to the utility model, through a continuous and linear working process, manual intervention and waiting time are reduced, so that the glass can be printed more quickly, the overall working efficiency is improved, the productivity is improved, and continuous flat plate printing of the glass is realized.

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 embodiment of the invention provides a muon angle measurement cross positioning method and device based on simulation, a medium and equipment, and the method comprises the following steps: constructing a muon flux model based on the distribution of muons on an azimuth angle and a zenith angle; constructing an angle measurement cross positioning model, and calculating the coordinates of the positioning detector through the coordinates of the reference detector and the coordinates of the positions where the muons penetrate through the positioning detector by using the angle measurement cross positioning model; an angle measurement cross positioning error model is constructed based on the angle measurement cross positioning model, and the value of a geometric precision factor is calculated by using the angle measurement cross positioning error model; constructing an angle measurement cross positioning physical simulation model; and operating the angle measurement cross positioning physical simulation model, generating a positioning result based on an effective event output by the angle measurement cross positioning model, and performing precision analysis on the positioning result. According to the scheme, the physical simulation model is positioned through angle measurement cross, so that the efficiency of a verification link before an in-situ experiment is improved, and the experiment cost is reduced.

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 relates to the technical field of optical free-form surface non-contact measurement, and discloses a free-form surface contour detection method and device based on confocal fixed-focus normal vector measurement, and the detection device comprises a normal vector measurement sensor, a precise motion platform and a computer. Synchronously acquiring position information of the laser interferometer, light spot centroid offset of a normal measurement light beam of the two-dimensional position detector and light intensity information of the focus detector by using a data acquisition card; wherein the precise motion platform comprises a scanning workpiece table, an objective lens driver, a Z-direction macro displacement guide rail and a motion controller, and the motion controller is used for controlling the scanning workpiece table, the objective lens driver and the Z-direction macro displacement guide rail to execute high-precision displacement; and the computer sends a scanning measurement sampling point of the measured free-form surface to the motion controller so as to realize scanning measurement of the measured free-form surface. According to the invention, the surface contour of the free-form surface can be reconstructed by fitting the normal vector of the focus position, and high-precision detection of the contour of the free-form surface is realized.

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.

The invention provides an accelerator system adjustment method, an accelerator system, electronic equipment and a storage medium. The transmission characteristic data and the charge quantity data of the undeflected beam are obtained through the first beam position detector, and the form and the charge quantity of the undeflected beam are accurately adjusted in combination with a preset adjustment strategy, so that the stability of beam transmission is ensured. And after the form data of the first beam reaches a preset value, monitoring the deflected beam data by using a second beam position detector, and further accurately adjusting the accelerator system to ensure that the deflected beam conforms to the target transmission characteristics. According to the invention, the transmission state of the beam can be accurately controlled in real time, risks of vacuum box breakdown and the like caused by beam mismatch are avoided, the safety and the stability of the system are improved, the possibility of equipment damage is obviously reduced especially under the high-dose-rate transient beam, and the treatment effect and the continuity of Flash radiotherapy are guaranteed.

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.

The invention relates to the field of nuclear power plant rod position measurement system adjustment and calibration, in particular to a rod position measurement and parameter adjustment and calibration method and system and a medium, and the method comprises the steps: respectively adjusting the induction voltage of each secondary coil to be a preset calibration induction voltage according to a rod position detector and a secondary coil group; acquiring a bump peak voltage and a small trough voltage of each secondary coil of the corresponding rod position detector in the full-stroke movement process of the control rod; and for each secondary coil group, calculating an optimal comparator threshold voltage and an optimal hysteresis voltage range according to the bump peak voltage and the small trough voltage of the corresponding secondary coil, and taking the optimal comparator threshold voltage and the optimal hysteresis voltage range as the threshold voltage and the hysteresis voltage range of the threshold comparator. Compared with a traditional method, the method has the advantages that the number of trial times of blind parameter adjustment is greatly reduced, the static test duration is shortened, the adjustment efficiency of a rod position measurement system is remarkably improved while the position indication precision of the control rod is guaranteed, and the operation and maintenance cost of a nuclear power unit is saved.

The present invention provides a method and system for testing the motion flatness based on line laser and position detector calibration, which relates to the field of high-precision geometric testing. The motion flatness testing method calibrates the position-sensitive detector based on a reference motion platform before measurement to ensure the measurement accuracy, and can accurately measure the scanning space motion flatness of the target test motion platform. The entire testing system is added to the motion control system of the spatial motion platform as an error measurement component for high-precision spatial motion scanning testing, which can measure the flatness error value in real time and feedback it to the motion control system of the spatial motion platform. During the scanning test process, the Z-axis offset value measured on the position-sensitive detector is monitored and read in real time, and the Z-axis component is driven for fine adjustment and calibration, so that the end of the position-sensitive detector always maintains planar motion in the scanning space, realizing high-precision scanning space planar motion.

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.

The present invention provides a silicon carbide-based ultraviolet position-sensitive detector and a preparation method thereof, belonging to the technical field of position detectors. It includes an N-type silicon carbide substrate layer, an electrical isolation layer, a highly doped lower drift layer, a lowly doped middle drift layer, and a highly doped upper drift layer arranged from bottom to top. A first graphic area is provided on the highly doped lower drift layer, and the lowly doped middle drift layer and the highly doped upper drift layer are located in the first graphic area. First ohmic contact electrodes are respectively arranged on opposite sides of the first graphic area in a first direction. Two second ohmic contact electrodes are arranged at intervals along a second direction on the top of the highly doped upper drift layer, and the second direction is perpendicular to the first direction. The conductive characteristics of the highly doped lower drift layer and the highly doped upper drift layer are opposite. It can solve the technical problems of large detection structure position error and unsatisfactory measurement accuracy caused by device structure defects in the existing ultraviolet position-sensitive detectors.