1180results about How to "Easy to install and adjust" patented technology

The invention discloses a wax injection mold for investment casting of hollow turbine blades and a method for rapidly and accurately manufacturing the wax injection mold. The mold consists of a cavity mold, a mold core and an accessory structure, wherein the cavity mold comprises an upper mold and a lower mold of a combined structure; each mold block forming the cavity mold consists of an external aluminum mold frame, an internal cast zinc alloy inlay and a conformal cooling copper pipe embedded into the inlay; a mold core positioning piece which can be decomposed at a high temperature is arranged on a longitudinal rib of the mold core; and water-soluble core blocks used for forming exhaust openings in the rear edges of the turbine blades are arranged on rear edge ribs of the mold core. The matching precision of the mold core positioning piece and the cavity mold is guaranteed by adopting a cavity mold interior running-in method, and the matching precision of the water-soluble core blocks and the cavity mold is guaranteed by adopting a cavity mold interior adhesion method. The wax injection mold disclosed by the invention is low in manufacturing cost and short in period, and the high wax pattern precision and core positioning precision can be obtained.

The invention relates to a wheel-rim electric axle for an electric automobile, belonging to the technical field of motor-driven rear axle assemblies of passenger car chassises. The wheel-rim electric axle comprises a rear axle shell assembly, two water-cooling brushless direct-current permanent magnet motors, two rear axle main reducing gear assemblies, two rear axle wheel-rim reducing gear assemblies and the like. The invention changes the transmission direction and enlarges the torque to achieve the purpose of first-stage speed reduction by using the two high-torque water-cooling brushless direct-current permanent magnet motors to simultaneously drive the left and right rear axle main reducing gear assemblies, achieves the purpose of second-stage speed reduction by the rear axle wheel-rim reducing gears, and drives the entire wheel part by using a planetary wheel to drive the wheel-rim reducing gear shell and the rear wheel hub. The wheel-rim electric axle is applicable to various large electric passenger cars, achieves high transmission efficiency, omits the transmission case and the transmission shaft, can simultaneously realize the middle-engine rear-drive, and omits the electro-hydraulic controlled articulated driving device and the automatic gearbox. Besides, the invention overcomes the problems that the axle of the existing electric automobile has low transmission efficiency and the hub motor transmission structure can be only used for small cars such as sedans.

The invention belongs to the technical field of engines, and particularly relates to an integrated engine brake rocker arm structure. A rocker arm is arranged on a rocker arm shaft, a roller is arranged at one end of the rocker arm and connected with a venting cam in a contacting manner, a brake mechanism with a one-way valve structure is arranged at the other end of the rocker arm and operates a venting gate bridge, an oil control valve mechanism is mounted on the rocker arm between the brake mechanism and the rocker arm shaft, a brake oil channel and a lubricating oil channel are formed in the rocker arm shaft, a first brake oil channel communicated with the oil control valve mechanism and a second brake oil channel communicated with the oil control valve mechanism and the brake mechanism are formed in the rocker arm, the first brake oil channel is connected or disconnected with the second brake oil channel through the oil control valve mechanism, rotation of the venting cam drives the rocker arm to swing around the rocker arm shaft, and the venting cam is matched with a solenoid valve signal to drive the oil control valve mechanism and the brake mechanism to act, so that the action of the venting gate bridge is controlled. The brake mechanism of an engine is integrally modular, simple, low in cost, convenient to mount and adjust and wide in applicability.

The invention relates to a prepositive left and right deflection overfeeding composite spinning device and a process as well as application of the device and the process. The device mainly comprises a bridging roller, a speed regulation roller, an overfeeding roller, a reciprocating rod, a deflection yarn guide hook and a reset spring. A composite spinning method adopting the device is characterized in that through the rotation of a front roller, the bridging roller, the speed regulation roller and the overfeeding roller drive an outer shaft system through friction, the overfeeding of long yarn beams or yarns is realized at the front part of the front roller, and in addition, the long yarn beams or the yarns are gathered with output short fiber whisker strips to form double-component overfeeding composite yarns through twisting. The method is unique and is easy to realize, the corresponding device is simple and compact and is convenient to install, and the overfeeding wrapping composite spinning of the short fiber whisker strips on a ring spinning frame can be realized.

A pulse light beam quality test Hartmann wavefront sensor includes a data collection device capable of receiving and sending synchronous pulse signals, a micro-prism array, a Fourier lens and a photoelectric detector, characterizing that said sensor is composed of a micro-prism array in a variable period two-dimension saw-tooth phase grating structure, a Fourier lens close to it and the photoelectric detector, among which, the micro-prism array has a ring layout structure with a symmetrical single etching center and a double sided grating structure with double-sided etching which can either apply the micro-optical technology or binary optical technology.

The invention relates to an automobile hydraulic electric power steering reliability test bench and program control test method. An input system comprises a servo motor, a reducer and a universal joint connected with the input end of a steering gear; an output system comprises a linear hydraulic cylinder with two functions of driving and load simulation, the front pole of a hydraulic cylinder piston is provided with a pressure sensor and connected with the rocker arm of the output end of the steering gear by a coupler with a joint bearing. An eccentric shaft, an eccentric bushing and a variable frequency motor are arranged at the inner bore of the rear lug of the hydraulic cylinder to form an automobile vibration simulation system, so as to simulate real vibration of rugged road surface. The hydraulic cylinder is compact and simple in structure, system integration is high and usable range is wide. The joint bearing causes the installation to be convenient. The hydraulic loop includes a throttle valve, thus speeding up oil-taking. An industrial personal computer, a motion control card and a data acquisition card are used, so that system stability is high, measurement accuracy is high, and response speed is fast. Curves and process control can be displayed in real time, and automatic save, plotting and printing can be realized. The test bench set can complete all reliability tests of fatigue, wear, forced steering, inverse overload and overpressure.

A locking and unlocking mechanism of a power-driven sliding plug door comprises a locking and unlocking assembly and a motor rocker driving assembly. The locking and unlocking assembly comprises an unlocking rocker, a left rocker, a right rocker, a draw bar and a knuckle bearing connection rod, wherein the locking and unlocking assembly is connected with the motor rocker driving assembly through the knuckle bearing connection rod; and the motor rocker driving assembly drives the locking and unlocking assembly to actuate through the knuckle bearing connection rod. When a door sash is opened, a motor rotates, and a casing of the motor rotates reversely due to overlarge resistance to drive the driving rocker and the unlocking rocker to swing, so that the unlocking rocker passes through a locking dead point in swinging mode to achieve unlocking; and when the door sash is closed, the unlocking motor rotates reversely, when the unlocking motor reaches the position the door sash needs to be closed, the casing of the motor rotates reversely due to increased door closing resistance to drive the driving rocker and the unlocking rocker to swing reversely, and when the unlocking rocker passes through the locking dead point, locking can be achieved. The locking and unlocking mechanism is simple in structure, low in cost, convenient to install and adjust, high in reliability and good in safety.

The invention discloses a multi-piece magnetorheological fluid electromagnetic clutch which is in a multi-piece structure. A plurality of gaps between drive and driven friction plates are filled with magnetorheological fluid serving as medium, a plurality of magnetorheological fluid operating ring surfaces are formed, magnetic field intensity of the gaps is high, distribution of the gaps is reasonable, high torque can be transmitted, high transmission power can be controlled with low excitation current, automatic control is easy to implement, and engaging and disengaging can be stabilized. Input and output shafts, both provided with end bearings, and a housing form a whole installed inside a frame. The multi-piece magnetorheological fluid electromagnetic clutch is compact in structure, high in rigidity, convenient to mount and maintain, simple in structure, high in reliability, stable in transmission, and applicable to various small- and medium-sized automatic devices and servo drivers.

The invention relates to a piezoelectric actuator, in particular to an inner driving type passive clamping piezoelectric actuator. The problems that according to an existing inner driving type clamping piezoelectric actuator, self locking cannot be achieved during outage, a driver is slow in running speed, and requirements for machining accuracy of a clamping body and a guiding track are high are solved. The inner driving type passive clamping piezoelectric actuator comprises a guiding track, driving bodies, a driving piezoelectric stack, two clamping piezoelectric stacks and two clamping bodies. Each clamping body comprises a piezoelectric stack pre-tightening piece, two clamping triangle amplified flexible hinges, two clamping piezoelectric stack supporting bodies and two clamping heads. Each driving body comprises two driving triangle amplified flexible hinges, two driving piezoelectric stack supporting bodies and two driving piezoelectric stack pre-tightening pieces. The driving bodies connected with the clamping bodies are arranged between the two clamping bodies. The driving bodies and the clamping bodies are placed in grooves of two arms of the guiding track. The piezoelectric actuator is used in a micro-driving process.

A kind of six-dimension force sensor of three-dimension force whole assembly belongs to the six dimension force sensor field. Especially it relates to measure the six dimensions force by composing the three-dimension force quartz wafer wholly. It is made up of the lower inner sleeve, top inner sleeve, out sleeve, the mechanism arm, the three-dimension force quartz wafer base, the three-dimension quartz wafer cover and the three-dimension force quartz wafer group. The up inner sleeve is installed at the joint between the manipulator and arm, the lower inner sleeve is installed at the bottom of manipulator. The sealing three-dimension quartz wafer divide into two groups are fixed on the top and low inner sleeve; the out sleeve is connected with each quartz wafer group end cover by the connecting nut. The sensor has the simple structure, high precision, convenience installation; so it is proper for measuring the six-dimension big force of large load equipment.

The invention relates to a light bidirectional fork for a stacker, and belongs to an laminated-structure stacker fork. The invention mainly solves the technical problem that the conventional stacker fork is unreasonable in structure, heavy in self weight, large in occupied space, inconvenient to install and regulate, and difficult to machine and manufacture. In order to solve the technical problem, the invention adopts the following technical scheme: the light bidirectional fork for the stacker comprises an upper fork, a middle fork, a lower fork, a steel wire rope, a steel wire rope regulator, a middle fork roller, an upper fork guiding bolt bearing, a middle fork guide bolt bearing, a middle fork transmission rack, a lower fork transmission gear, a coupler, and a motor. The upper fork, the middle fork and the lower fork form a three-layer laminated structure, the motor is connected with a gear shaft through the coupler and drives the lower fork gear, the lower fork gear makes the middle fork move leftwards and rightwards through the middle fork transmission rack, and the leftward and rightward movement of the middle fork drives the upper fork to move leftwards and rightwards through the middle fork roller and the steel wire rope.

The invention relates to an on-line monitoring method of the change of six freedom degrees between the lenses of an astronautical CCD camera with three linear arrays. A laser emitting and receiving device which comprises a laser source, an optical fibre coupler, a laser aligner, a semi-transparent semi-reflecting mirror and a first area array CCD camera is rigidly fixed on a camera lens A, and a laser reflecting and receiving device which comprises a plane mirror, a second area array CCD camera and a third area array CCD camera is rigidly fixed on the a camera lens B. The optical fibre coupler divides lasers emitted from the laser source into three paths, and then, the lasers are respectively aligned by the laser aligner and are output, wherein two paths of the lasers are respectively and directly projected on the two area array CCD cameras of the laser reflecting and receiving device, and the other path of the lasers are reflected on the single area array CCD camera of the laser emitting and receiving device. The change of three rotating freedom degrees and three translational freedom degrees between the lenses of the astronautical camera is solved through the change of facula positions on each area array CCD camera. In the invention, a non-contact measurement method is adopted, the structure of the astronautical camera can not be changed, the processes of installation and adjustment are convenient, the structure is compact, and the on-line operation mode can be achieved.

The invention provides a construction method for paving and sticking stone materials or ceramic tiles on a wall or floor. The construction method comprises the following steps: sticking an extruded sheet on the back of a plate to be paved and stuck in advance and mounting stainless steel back bolts; sticking and hanging materials to be paved and stuck on the wall by using adhesive and hanging pieces so as to achieve a firm paving and sticking effect.

The invention discloses a detection device for disconnecting link opening and closing in place, comprising an auxiliary contact of disconnecting link movement, wherein the auxiliary contact of disconnecting link movement is connected with an operation protector, a condenser reflector is arranged on a moving contact of the disconnecting link, light transmitting and receiving devices are installed on the security platform of the disconnecting link base, one set of light transmitting and receiving devices transmit and receive the light beam reflected back by the condenser reflector of the disconnecting link when the disconnecting link is closed in place, another set of light transmitting and receiving devices transmit and receive the light beam reflected back by the condenser reflector of the disconnecting link when the disconnecting link is opened in place. The output terminal of the contrast and judgment circuit of the light transmitting and receiving device is connected with the auxiliary contact of the disconnecting link so as to judge whether the opening and closing of the disconnecting link is in place. The signal is transmitted to the operation protector as monitoring signal for remote operation. Compared with the prior art, the invention can effectively detect the condition of the opening and closing of the disconnecting link, thereby avoiding the occurrence of the vicious accidents caused by misoperation as the opening and closing of the disconnecting link is out of place. The invention can be widely applied in devices such as disconnection disconnecting linkes, grounding disconnecting linkes and load disconnecting linkes, etc.

The invention relates to a confocal optical scanner, and especially relates to a confocal optical scanner using array detectors comprising CCD, EMCC, CMOS and sCOMS as detection units and applied to biological fluorescent microscopic imaging. The confocal optical scanner is mainly characterized in that microlenses of a microlens array corresponds to pinholes of a pinhole array one by one, and the pinhole array is positioned in the focal plane of the microlenses; excitation light illuminating a sample and fluorescence emitted by the sample pass through a same pinhole in the pinhole array; the pinholes of the pinhole array are arranged in an equidistant matrix manner, and illumination points of the pinholes on the sample have a same moving speed; and a scan vibrating mirror has two reflection planes, and the scanning imaging of the sample is realized through the reciprocating rotation of the scan vibrating mirror. So the confocal optical scanner has the advantages of fast scanning speed, zero stray light background noise, uniform illumination intensity and the like, and can be easily synchronously controlled together with the exposure of the detectors.

The invention relates to the field of building materials, in particular to a recycled constant-temperature ceramic floor integrated system. The recycled constant-temperature ceramic floor integrated system comprises floor tiles, wherein a plurality of grooves are formed in the bottom surfaces of the floor tiles. The bottom surfaces of the floor tiles are connected with base plates, support assemblies are arranged among the grooves and the base plates in a laid mode and comprise heat-conducting pieces and locating supports which are installed in an up-and-down lapping mode, reflecting films are arranged among the heat-conducting pieces and the locating supports, the base plates are made of plate pieces of a net structure, and hasp grooves and hasp blocks are arranged on the peripheries of the base plates. According to the recycled constant-temperature ceramic floor integrated system, the structure is arranged in a modular split joint mode, the support assemblies are arranged among the floor tiles and the base plates in a laid mode, the support assemblies needed by water heating or electric heating can be correspondingly arranged combining with requirements for specific using conditions, the structure is tight and firm after the support assemblies are assembled, sliding, displacement and slipping are not prone to occurring, the whole operation, adjustment and installing are conveniently conducted, replacement of different floor heating modes is achieved, the problem that the structure can only be laid in a single floor heating mode is completely solved, laying is economical, the floor tiles can be recovered and recycled, and universality of products is high.

The invention discloses a monocular vision measuring method of a non-contact precision measuring corner, belonging to the technical field of photoelectric detection and aiming at realizing wider measuring range, high measuring precision and more convenient operation. Based on a monocular vision principle, the method comprises the following steps of: fixing a test target with a double-circle sign on an object to be measured parallel to a rotating shaft; photographing a target surface by using a position-fixed digital camera; selecting a group of characteristic points and characteristic parameters of an image surface to establish a set of computing method and formula for solving the corner by taking an image of the double-circle sign as an oval; processing photos by using a sub-pixel processing method, solving an equation of an image surface oval and image surface coordinates of the characteristic points and solving a plane equation of the target surface and a corner of the object to be measured; accurately solving the position of an image point in the center of a circle without marking the position of the center of a circle of the target surface; and correcting a measuring error caused by unparallel relations of the target surface and the rotating shaft by using data obtained in the measuring process. The invention has the advantages of simple installation and adjustment of equipment, high measuring precision, high practicability and capability of being used for marking angular displacement transducers such as a rudder, a horizontal rudder of an aircraft and the like on site of an airport.

The invention relates to a solar heliostat driving device which comprises a driving box body and a driving box pedestal, wherein the driving box body is coaxially installed on the driving box pedestal, the driving box body is installed on the driving box pedestal through a box body connecting shaft and a thrust bearing, an azimuth driving system is installed on the driving box pedestal, and a pitching driving system is installed on the driving box body. The invention has small tooth side gap of a driving gear, high driving precision, large bearing capacity, light weight and convenient installation, adjustment and maintenance, the tooth side gap can be adjusted at any moment in the installation and use processes according to the tooth side gap size of the gear, and the tooth side gap of the gear can be adjusted to be below 0.1mm and theoretically can reach a zero side gap. Calculated according to the gear diameter of 400mm, a tracking error is below 0.5mrad, the minimum tooth side gap of the output gear of a general heliostat driving device is above 0.2mm, the tracking error is above 1.0mrad, and the tracking precision is improved by more than one time than that of an ordinary driving device.

An adaptive optical system based on X-H wave front transducer of micro prism comprises X - H wave front transducer of micro prism, wave front processor and wave front calibrator. It is featured as forming said transducer by micro prism array in two - dimensional saw tooth phase grating structure and Fourier lens as well as photoelectric detector, using two structures of ring structure with single surface photo etching center symmetry or double surface grating structure with double surface photo etching as said micro prism array structure, applying micro optical technique or two - element optical technique to prepare two said structure.

The invention relates to a door body adjusting device for an embedded dish washing machine. The device mainly comprises an upright post, a fixing block, a spring adjusting rope I, a spring, a hinge fixing plate, an adjusting bolt mechanism, a hinge plate, a door body, a spring adjusting rope II and a fixed pulley, wherein the hinge fixing plate is fixed on the upright post; the hinge plate is fixed on the door body; the adjusting bolt mechanism and the fixed pulley are fixed on the hinge fixing plate; the spring adjusting ropes are hung at the two ends of the spring; the other end of the spring adjusting rope I moves around the fixing block on the top and the adjusting bolt mechanism and is fixed on the hinge fixing plate; and the other end of the spring adjusting rope II moves around the fixed pulley on the lower side and is fixed on the hinge plate. The elongation of the spring is controlled through the axial position of a spring adjusting rope adjusting plate in the adjusting bolt mechanism. By a hinge mechanism and a door body mechanism for the embedded dish washing machine, the door body can be automatically closed in 0 to 30 degrees and stops at any position in the range of 30 to 90 degrees, and the device has the characteristics that: the device has a simple structure and is convenient to install.

The invention discloses a phase modulation grating sensor and a method for realizing measurement. Phase modulation based on PZT is performed to grating measurement signals so as to prevent direct current shift and amplitude value fluctuation from influencing nanometer measurement signals; an error detection module is embedded to real-timely compensate the alignment error of the grating sensor so as to realize displacement and length measurement in nanometer accuracy; and the phase modulation grating sensor comprises an optical path part and a signal processing part. The phase modulation grating sensor and the method have the advantages as follows: installation and adjustment are simplified; redundant reflection beams are reduced; signal quality is improved; interference of the environment to the system is reduced; based on the FPGA signal processing part, the signal processing speed of the system is increased; and by phase modulation, direct current shift and amplitude value fluctuation can be prevented from influencing the measuring signals effectively, so that measurement in nanometer accuracy is realized.

The invention discloses a rubber crushing device, and relates to the technical field of manufacturing of rubber crushing equipment. The rubber crushing device comprises a shell, wherein the shell is arranged on a support frame; a feeding opening is formed in the upper part of the shell; a discharge opening is formed in the lower part of the shell; a crushing knife roll which is driven by a motor to rotate is arranged in the shell, and comprises a roll shaft and a plurality of cutter heads; the plurality of cutter heads sleeve the roll shaft; a plurality of movable blades are distributed on each cutter head along the circumference distribution; the movable blades on the adjacent two cutter heads are staggered with one another; fixed blades which are matched with the movable blades are arranged on each of two sides of the shell; and a sieve is arranged below the crushing knife roll. Compared with the prior art, by virtue of coordinated shearing of the fixed blades arranged on two sides of the shell and the movable blades of the crushing knife roll, the rubber crushing device is simple in structure, easy to mount and adjust, and low in manufacturing cost.

The invention discloses a laser-based deformation displacement measurement method, comprising the following steps of: step 1, preparatory work: arranging a reflecting mirror on an object to be detected, and setting a laser modulation frequency; step 2, acquisition of two phase differences: acquiring the phase difference delta of time T0 and the phase difference delta of time T1 according to a phase difference acquisition step, wherein the time T0 and the time T1 both indicate the time of receiving reflected laser; and step 3, calculating a deformation displacement amount delta L, the calculation formula of delta L=K*(delta-delta), wherein K=c / (4pi*f). The method disclosed by the invention is easy in implementation and high in precision.

The invention discloses a novel mixing magnetic bearing which comprises a rotating shaft, a permanent magnet radial bearing, an auxiliary adjusting device, a protecting spring and a protecting pin, wherein the permanent magnet radial bearing is utilized to supply a bias magnetic field for generating a larger radial suspension force; the auxiliary adjusting device comprises an axial electromagnet bearing, a compression spring, a rolling bearing, a rolling bearing sleeve, a bearing penetrating cover and an isolating check ring; when the system normally works, the auxiliary adjusting device has the function of adjusting the radial position of a rotor; and when the power of the system is accidentally cut off, the auxiliary adjusting device has the function of auxiliary supporting. The novel mixing magnetic bearing has the advantages that the supporting performance and control reliability of the magnetic bearing are increased, the falling abrasion is reduced, the service life of the auxiliary bearing is prolonged, the magnetic bearing is compact in structure, the utility rate of space is increased and the cost is lowered.

The invention provides an elastic coupling dynamic and static torsion rigidity simple testing device and method. One end of an elastic coupling is fixed, and a loading arm and a torque preloading device are arranged on the other end. The torque preloading device is used to preload torque of a certain degree, a turning angle indicating gauge measures a static angular displacement of the coupling, a preload force is converted into preload static torque, and the static torsion rigidity of the coupling is obtained; and the loading arm is excited by a vibration exciter, an impedance head is utilized to measure the dynamic force and dynamic acceleration of an excited point of the loading arm, the force and acceleration are converted into the torque and dynamic angular displacement, and finally the dynamic torsion rigidity of the coupling is obtained. According to the invention, a special test table is not needed, the installation and adjustment are convenient, both the static torsion rigidity and the dynamic torsion rigidity can be measured, the vibration exciter is used for dynamic loading, the exciting frequency and amplitude can be conveniently adjusted on line, and the torsion rigidity under different working frequencies can be conveniently tested; in addition, dual-bearing constraint is adopted, bending-torsional coupling generated when the coupling is excited is avoided, and the measuring result is more precise.

The invention discloses a large-size multi-axis-linkage electrolytic machine tool which comprises a machine tool body, an electrolytic machining pulse power source, an electrolyte circulating and filtering system and an integrated control system. The integrated control system can realize integrated control on machine tool motion parameters, electrolyte parameters and pulse power source parameters; the electrolyte circulating and filtering system adopts parallelly-connected double loops to filter an electrolyte, so that the electrolyte input into a machining area is high in cleanliness, and the electrolyte circulating and filtering system has a function of automatically adjusting the electrolyte parameters ( temperature, concentration and pH value); the machine tool body comprises a bed body, a horizontal workbench, a turnplate, a spindle, a working box and a machine tool cover, and the machine tool can realize five-axis linkage; a numerical-control rotary table is arranged below the turnplate, a sliding device is arranged below the working box, and when a large-size workpiece and a cathode are mounted and adjusted, the working box can move to above the machine tool cover through the sliding device; a protecting device is arranged below the horizontal workbench and the turntable, so that the electrolyte can be effectively isolated from the numerical-control rotary table and a transmission mechanism.

A distribution machine used in a concrete component production system comprises a machine frame, a distribution box arranged on the machine frame, a feeding hopper communicated with the distribution box, a storage tank communicated with the feeding hopper, a weighing mechanism and a feeding mechanism, wherein the weighing mechanism and the feeding mechanism are arranged on the machine frame. The feeding mechanism comprises a first drive device, a wheel shaft, star wheels and partition sleeves, wherein the wheel shaft is arranged in the distribution box and connected with the first drive device, the star wheels are arranged on the wheel shaft at intervals, and the partition sleeves are arranged between adjacent star wheels, a discharging opening is formed in the position, corresponding to the star wheels, at the bottom of the distribution box, a discharging gate plate is arranged on the discharging opening, and the discharging gate plate is matched with the distribution box in a sliding mode. The distribution machine has the advantages that distribution is uniform and stable, feed amount of concrete can be conveniently and quickly controlled according to actual needs, distribution efficiency is improved, precise measuring of the material quantity is achieved, waste of raw materials is reduced, and quality of products is well guaranteed.

The invention provides a non-contact six-freedom-degree (DOF) micrometric displacement measurement device, which comprises: a movable part, an object to be measured which is fixed with the movable part, a stationary part, and three area-array CCDs, wherein, the first area-array CCD and the second area-array CCD are fixed with the movable part together, and the third area-array CCD is fixed with the stationary part together; a three-way laser output structure is fixed with the stationary part together and emits three beams which are respectively received by the three area-array CCDs, wherein, when the object to be measured carries out movement of arbitrary DOF, the position of a light point on the corresponding area-array CCD is caused to be changed, and the six-DOF displacement of the object to be measured is calculated according to the change of the light point position before and after the movement of the object to be measured. The non-contact six-DOF micrometric displacement measurement device can be used for the six-DOF micrometric displacement monitoring of high-precision objects.

Provided is a position detection system which can be realized at a low cost without requiring a strict management of sensor mounting accuracy. The position detection system includes: a linear motor (11) having a rod (1) in which N-poles and S-poles are alternately arranged in the axial direction and a plurality of coils (4) surrounding the rod (1); a magnetic sensor (12) which detects a change ofthe magnetic field direction of the rod (1) generated by a relative rectilinear motion of the rod (1) with respect to the coils (4) and outputs a sine wave signal and a cosine wave signal having a phase difference of 90 degrees; and a position detection circuit (13) which detects a relative position of the rod (1) with respect to the coils (4) according to the sine wave signal and the cosine wavesignal. Since the magnetic sensor (12) detects the change of the magnetic field direction of the rod (1), no change is caused in the sine wave signal and the cosine wave signal outputted by the magnetic sensor (12) even if the distance between the rod (1) and the magnetic sensor (12) is shifted.