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43results about How to "Implement position detection" patented technology
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Position detector for double grating displacement transducer metering mode and detection method thereof
The invention relates to a location testing apparatus of double-grating shift sensor numbering mode and its testing method. The output ends of the micrometer degree grating shift sensor 1 and the nanometer degree grating shift sensor 2 are separately connected with the two input ends of the numbering and switching circuit 3. The invention adopts double-grating shift sensor numbering mode, which uses micrometer degree grating shift sensor 1 to test high speed shift when it enters into high speed stage and uses nanometer degree grating shift sensor 2 to test low speed shift when it enters into low speed stage. The invention can achieve the cm degree testing stroke, m / s degree testing speed and nm degree testing precision.
Owner:HARBIN INST OF TECH
System and method for detecting hoisting prevention on basis of laser
ActiveCN106829742AEnables real-time location detectionImplement position detectionLoad-engaging elementsAutomatic controlLaser scanning
The invention discloses a system and a method for detecting hoisting prevention on the basis of laser. The system comprises a logic operation unit, a laser scanner and a PLC (programmable logic control) system. The laser scanner and the PLC system are connected with the logic operation unit. Compared with the prior art, the system and the method have the advantages that the locations of lifting appliances, containers, trucks and the like can be detected by the aid of laser scanning ranging principles and pattern recognition and automatic control technologies in real time, running of lifting mechanisms can be controlled according to safety control strategies, the system has functions of preventing the trucks from being hoisted, and accordingly production accidents can be prevented; the side contours can be continuously scanned and recognized during operation on the containers, accordingly, hoisted states of the trucks can be accurately judged, and the container loading and unloading safety can be greatly enhanced.
Owner:CATHAY NEBULA SCI & TECH CO LTD
Multi-turn absolute value encoder and position detecting method
PendingCN107655399ASimple structureLow costUsing electrical meansConverting sensor outputEngineeringSingle chip
The invention relates to the technical field of industrial control, in particular to a multi-turn absolute value encoder and a position detecting method based on the multi-turn absolute value encoder.The multi-turn absolute value encoder comprises a single chip microcomputer, a permanent magnet and at least one magnetic angle sensor, wherein the permanent magnet is installed on an object to be detected and rotates along with the object to be detected; the at least one magnetic angle sensor is arranged on the periphery of the permanent magnet, so as to detect a single-turn absolute angle valueof the object to be detected; a zero position of the single-turn absolute angle value is calibrated and stored in the single chip microcomputer; and an output end of the at least one magnetic angle sensor is connected with the single chip microcomputer separately. Compared with an existing multi-turn absolute value encoder, the multi-turn absolute value encoder disclosed by the invention has simpler structure, can effectively reduce the cost and design difficulty, is high in reliability and stability, and realizes the multi-turn position detection at a low cost.
Owner:北京京晟智能科技有限公司
Multiple-target passive tracking method based on wireless sensor network
InactiveCN103885029AEasy to trackRealize real-time monitoringPosition fixationWireless communicationBroadcast packetLine sensor
The invention discloses a multiple-target passive tracking method based on a wireless sensor network. The multiple-target passive tracking method based on the wireless sensor network comprises the following steps: S01, sensor nodes of the wireless sensor network broadcasts data packs according to number sequences; S02, data are uploaded to a control center after broadcasting is finished, the control center performs calculation to judge real-time target number; S03, global dynamic theoretical signal intensity matrixes of all of targets are calculated through an additivity model and accordingly the target location likelihood degree is calculated; S04 using a Markov chain Monte Carlo algorithm to perform real-time tracing on all of targets. Multiple moving targets in a coverage region of the wireless sensor network can be traced simultaneously, and further the tracing accuracy is improved.
Owner:SUZHOU GUOKE SENSING TECH CO LTD
Intelligent magnet gumming machine
ActiveCN111558501AEasy to operateLow costLiquid surface applicatorsMeasurement devicesMagnetRobot hand
The invention discloses an intelligent magnet gumming machine which comprises a rack. A feeding device, a mechanical arm device, a gumming device, a detecting device and a discharging device are arranged on the rack. The mechanical arm device is used for grabbing magnets on the feeding device and sequentially moving the magnets to the gumming device to achieve gumming work, to the detecting deviceto achieve detecting work and to the discharging device to achieve discharging. After the feeding device achieves feeding, the mechanical arm device grabs the magnets on the feeding device, the magnets are sequentially moved to the gumming device to achieve gumming work, to the detecting device to achieve detecting work and to the discharging device to achieve discharging, automatic feeding, automatic gumming, automatic detecting and automatic discharging can be achieved, operation is convenient, the cost is low, and the rate of finished products of the magnets is high.
Owner:厦门诺博视科技有限公司
Wireless positioning method and system for underground space
ActiveCN110022530AImplement position detectionLow costParticular environment based servicesPosition fixationUnderground spaceEmbedded system
The invention discloses a wireless positioning method and system for an underground space. The wireless positioning method comprises the steps of arranging wireless access points in the underground space, and constructing a fingerprint database; acquiring RSSI information of the position of the target object, matching the RSSI information with the fingerprint database to obtain a predicted value of the position of the target object, acquiring inertial data, and performing track reckoning to obtain a measured value of the position of the target object; adopting Kalman filtering to fuse the predicted value and the measured value to obtain the position of a target person; and when no target object exists in the underground space, processing the CSI data sent by the wireless access point, anddetecting whether illegal invasion exists in real time. According to the method, the RSSI fingerprint positioning and the PDR positioning are fused through Kalman filtering, respective defects of theRSSI fingerprint positioning and the PDR positioning are overcome, and accurate positioning in narrow, closed and long-distance underground space can be achieved; only a small number of wireless access points need to be deployed and combined with widely applied smart phones, the cost is low, and the operation is simple.
Owner:HUAZHONG UNIV OF SCI & TECH
Linear motor position feedback device
PendingCN109831073AImplement position detectionSimple structureStructural associationGratingMagnetic reluctance
The invention discloses a linear motor position feedback device which comprises a magnetic displacement encoder, a signal adapter and a connecting line which are connected via a connecting line. The magnetic displacement encoder comprises a magnetic resistance and magnetic field detection circuit and an analog sine / cosine signal output signal connected successively, and the signal adapter comprises a refining circuit, and a power supply circuit, an external EEPROM storage circuit, an SPI serial debugging interface circuit, an error state indication circuit, an amplitude phase calibration circuit and a differential driving circuit connected to the refining circuit. A magnetic resistance chip is used to detect magnetic field change and output an analog sine / cosine signal, analog-to-digital conversion, refining and difference output are carried out on the analog sine / cosine signal, the signal is fed back to a servo driver, the linear motor position is detected, both a grating and a magnetic railing ruler are omitted, the structure is simple, installation is convenient, there is no friction due the non-contact manner, the anti pollution level is high, and the cost is reduced greatly.
Owner:SUZHOU LINGHOU ROBOT
Consequent pole brushless permanent magnet motor and electronic power-assisted steering system based on motor
ActiveCN105141099AReduce usageLow costMagnetic circuit rotating partsElectrical steeringElectric machineElectrical polarity
The present invention discloses a consequent pole brushless permanent magnet motor used for an electronic power-assisted steering system. The motor comprises a stator iron core having a hollow cylinder shape, a rotor iron core having a hollow cylinder shape, and a plurality of magnetic steels, wherein the inner wall of the stator iron core is equipped with grooves, and the stator windings are placed in the corresponding stator grooves; the rotor iron core sleeves a central through hole of a stator cylinder coaxially, the outer surface of the rotor iron core is equipped with a plurality of grooves, and the number of the grooves is a half of the number of the motor operation magnetic field poles; the plurality of magnetic steels are placed in the grooves of the rotor iron core in a one-to-one correspondence manner, and the polarities of the magnetic steels in the adjacent grooves are same, so that the rotor magnetic steels only exist the single polarity and form the salient pole structures, and accordingly, the permanent magnet amount can be reduced, while an output torque of the motor can be kept. The present invention also discloses the corresponding electronic power-assisted steering system. According to the present invention, the rotor structure of the permanent magnet motor is optimized and improved, thereby reducing the permanent magnet amount of the motor rotor, and being able to save the position sensors of the power-assisted steering system.
Owner:HUAZHONG UNIV OF SCI & TECH
Brushless direct current motor rotor position detection method based on single-phase inductance detection
InactiveCN109687779AShorten the control cycleReduce reactive energy flowTorque ripple controlAC motor controlPhysicsSingle phase
The invention relates to a brushless direct current motor rotor position detection method based on single-phase inductance detection. The brushless direct current motor rotor position detection methodincludes the following steps that a detection vector with the time duration being delta T1 is applied to a motor stator winding, the detection phase current is sampled at the beginning and end of vector application correspondingly, and the current change rate is obtained through subtraction of two values; a driving vector with the time duration being delta T2 is applied to the motor stator winding to drive a motor to run; induction energy is released slowly and the motor driving current is maintained by applying a circulation follow current vector in the remaining time of the control period;the variation trend of frac{d}{d<t>} is judged; and the execution steps are repeated continuously after a motor rotor passes through a switching point, and the motor rotor is switched to the next section after waiting for a delay at an electrical angle of 30 degrees.
Owner:天津卓业科技发展有限公司
Thread shearing mechanism and method
PendingCN108842427AHigh degree of automationImprove dismantling efficiencySevering textilesWaste management
The invention discloses a thread shearing mechanism and method. The thread shearing mechanism comprises a working table, a feeding device and a thread shearing device. The feeding device comprises a feeding platform and a feeding assembly, wherein the feeding platform and the feeding assembly are arranged on the working table, and the feeding assembly is used for driving cut-parts to move along the feeding platform; the thread shearing device comprises a thread shearing base, a thread shearing platform, a thread shearing detection component, a thread shearing device body and a thread shearingdriving component; the thread shearing base is arranged on the working table, the thread shearing platform is movably connected to the thread shearing base, the thread shearing driving component is used for driving the thread shearing platform to move, a thread shearing support is connected to the thread shearing platform, the thread shearing detection component comprises a first detection elementand second detection elements which are arranged on the thread shearing support, detection intervals are formed between the first detection element and the second detection elements, the thread shearing device body is arranged on the thread shearing platform and located between the detection intervals in the vertical direction, and the thread shearing device body is used for shearing fishing threads on the cloth pieces. The thread shearing mechanism is high in thread shearing.
Owner:GUANGDONG ESQUEL TEXTILES CO LTD
Optical position detection device and method
The invention discloses an optical position detection device. The device comprises a detection light source as well as a diaphragm, a projection lens group, an imaging magnifier group and a detector arranged along the imaging optical path of the detection light source successively, the detection light source is a point or line light source, the projection lens group input a light beam from the diaphragm to the to-be-measured surface of a workpiece in certain inclination angle, and the imaging magnifier group carriers out secondary amplifying imaging on a reflection light beam of the to-be-measured surface and then input the light beam to the detector. The invention also discloses an optical position detection method. According to the detection device and method, an independent imaging optical path is used, the edge contour is clearer, the detection precision is higher, the inclined input manner with different angles is used, the spatial position occupied by other optical paths can be avoided, the device is simple and reliable, the cost is low, position change in the surface of the workpiece can be amplified by 30-160 times, and submicron order position detection can be realized.
Owner:苏州亿拓光电科技有限公司
Mine car positioning and detecting system used for tracked mine car
InactiveCN103373374AAccurate and reliable detectionEasy to useRailway signalling and safetyAutomotive engineeringReal-time computing
The invention discloses a mine car positioning and detecting system used for a tracked mine car. The system comprises a central control unit (1) and multiple car detection units (2) sequentially arranged along tracks of the tracked mine car, each car detection unit (2) comprises a detection processor (21), an amplifying circuit (22) and multiple geomagnetic disturbance sensors (23), the geomagnetic disturbance sensors (23) are sequentially arranged along the tracks of the tracked mine car and connected with a detection processor (21) through the amplifying circuits (22) respectively, and the detection processor (21) of each of the car detection units (2) is connected with the central control unit (1) through a network respectively. The mine car positioning and detecting system used for the tracked mine car has the advantages of accuracy and reliability in detection, simplicity and convenience in use, needless of excitation and low using cost.
Owner:DUJIANGYAN AISITE TECH
Motion position detection mechanism and X-ray imaging device
ActiveCN103363932AImplement position detectionMeasurement devicesPhotographyRolling resistanceFixed frame
The invention discloses a motion position detection mechanism including a fixed frame for being fixed on either one of a moving part and a moving track; a roller rotating shaft which is fixed on the fixed frame in a rotatable way; a roller which is fixed on the roller rotating shaft; and a position sensor which is connected with the roller rotating shaft and rotates under the drive of the roller rotating shaft and outputs a position signal of the moving part. And the surface of the roller is used for contacting the surface of the other of the moving part and the moving track; when the moving part moves, friction is generated on the contact surfaces of the roller and the other of the moving part and the moving track; and the roller rolls under the action of the friction and drives the roller rotating shaft to rotate. The invention also discloses the X-ray imaging device. The motion position detection mechanism makes use of the rolling friction when the moving part moves so that the roller which is fixed on the position detection mechanism is capable of rotating, and then the rotation of the roller is transmitted to the position sensor so that position detection of the moving part is realized.
Owner:SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
A smart door lock
InactiveCN104727663BImplement position detectionAchieve closureNon-mechanical controlsLock casingsSafe-GuardFingerprint
The invention relates to an intelligent door lock. The intelligent door lock comprises a front panel, a back panel, a lock head, a front handle and a back handle. The lock head comprises a lock body, a lock head panel, an inclined tongue, a safety square tongue, a counter lock square tongue, a top and bottom hook and a lock cylinder, and a square hole, a lock cylinder hole and a counter lock square hole are formed in the lock body. A key hole is formed in the front panel and is communicated with the lock cylinder hole, and a counter lock knob is arranged on the back panel and penetrates through the back panel to be communicated with the counter lock square hole. A camera, a keyboard and a fingerprint collecting window are arranged on the front panel, a battery, a circuit board and a motor are arranged on the back panel, the battery is electrically connected with the camera, the keyboard, the fingerprint collecting window and the motor, the keyboard and the fingerprint collecting window are electrically connected with the motor through the circuit board, and the motor is connected with the lock cylinder through the lock cylinder hole. The intelligent door lock is simple in structure and variable in function, and is particularly applied to transforming a common mechanical safe-guard chain door lock into the intelligent door lock; the overall door lock can be transformed and upgraded without detachment, and operation is easy and rapid.
Owner:惠州诺盾高科电子有限公司
Method using static electricity supporting type differential capacitance method to measure three-dimensional acceleration
InactiveCN103344786AHigh sensitivityLarge measuring rangeAcceleration measurement using interia forcesAcceleration measurement in multiple dimensionsPhysicsDifferential capacitance
The invention discloses a method using a static electricity supporting type differential capacitance method to measure three-dimensional acceleration. The method uses liquid substances as a sensitive mass body, adopts a regular hexahedron structure, detects the deformation and location changes of liquid through the differential capacitance method, and measures the three-dimensional acceleration through using electrostatic force to balance inertia force. According to the method, liquid is used as the sensitive mass body, so that normal work can be restored after large impact or high overload; the static electricity supporting technology is adopted, and the electrostatic force and the inertia force are in linear relation, so that the method has the advantages of being high in sensitivity, wide in scaling range, and the like.
Owner:ZHEJIANG UNIV
Bidirectional on-load multi-stage air cylinder capable of being mounted horizontally
PendingCN108547828AImplement position detectionSimple structureFluid-pressure actuatorsEngineeringHorizontal and vertical
The invention relates to a multi-stage air cylinder, in particular to a bidirectional on-load multi-stage air cylinder capable of being mounted horizontally, and belongs to the technical field of multi-stage air cylinders. The bidirectional on-load multi-stage air cylinder comprises a telescopic head, a front end cover, a front inner end cover, an inner telescopic rod, an air channel hollow rod, an outer telescopic rod, an outer cylinder body, an inner piston, an outer piston, a rear end cover and a piston position induction mechanism. The front end cover is provided with a front air opening.The rear end cover is provided with a rear air opening. A radial air channel is arranged on the outer piston in the radial direction. The outer end of the radial air channel communicates with the front air opening. The inner end of the radial air channel communicates with the rear end of the air channel hollow rod. The front end of the air channel hollow rod communicates with the front end of theinner piston. An axial air channel is arranged on the outer piston. The rear end of the axial air channel communicates with the rear air opening. The front end of the axial air channel communicates with the rear end of the inner piston. The bidirectional on-load multi-stage air cylinder is simple, compact and reasonable in structure, on-load telescopic motion of the inner piston and the outer piston is achieved through the dual air openings and an inner air way, the use requirements of horizontal and vertical mounting are met, and the range of application is widened; and meanwhile piston position detection of the air cylinder can be achieved.
Owner:无锡气动技术研究所有限公司
Method for measuring three-dimensional acceleration through static supporting type optical detecting method
ActiveCN103323622BLarge measuring rangeImplement position detectionAcceleration measurement using interia forcesAcceleration measurement in multiple dimensionsLinear relationshipLinearity
The invention discloses a method for measuring three-dimensional acceleration through the static supporting type optical detecting method. A liquid substance is used as a sensitive quality body, a regular hexahedron structure is adopted, the optical detecting method is used for detecting liquid shape and position changes, and electrostatic force is used for balancing inertia force to realize three-dimensional acceleration measuring. According to the method for measuring the three-dimensional acceleration, the liquid is used as the sensitive quality body so that normal work can be recovered after large impact or high overload; due to the fact that the static supporting technology is adopted and the electrostatic force and the inertia force are in linear relationship, method has the advantages of being high in sensitivity, wide in measuring range and the like.
Owner:ZHEJIANG UNIV
Method of detecting ball groove of waveform surface of shift swing rod
InactiveCN105241331ASimple structureFew partsMechanical measuring arrangementsElectrical and Electronics engineeringEngineering
Owner:CHONGQING YINGQUAN STANDARD PARTS
Position detection apparatus and method
PendingCN112985375AImplement position detectionNavigation instrumentsLocation detectionComputer engineering
A position detection apparatus and method, the position detection apparatus comprising: a hydraulic container configured to provide a hydraulic environment for a detected member; a position detection device, located in the hydraulic container and arranged to detect the position change of the detected part and generate a detection signal; a power device, connected with the hydraulic container and used for providing power for the detected piece; and a signal receiving device, connected with the hydraulic container and arranged to receive the detection signal generated by the position detection device. The position detection method is applied to the position detection equipment.
Owner:TSINGHUA UNIV
Axial-integrated oil-immersed brushless DC motor position sensor installation structure
ActiveCN110768472BSmall sizeThe overall thickness is thinStructural associationElectronic commutatorsInterior spaceElectric machine
The invention belongs to the technical field of brushless DC motors, and relates to an axially integrated oil-immersed brushless DC motor position sensor installation structure, wherein a Hall PCB board (9) and a Hall position sensor (10) are installed inside a controller, And a Hall seal cover (6) for the mechanical seal controller is installed at the connection position between the motor body shell (1) and the controller shell (5). The Hall seal cover (6) is generally circular, and the middle part It has a circular protrusion, and the internal space of the circular protrusion is matched with the rotor position magnetic ring (4), and the material is magnetically conductive metal; the Hall seal cover structure of the present invention can realize the mechanical connection between the controller and the motor body. Sealed, the Hall sensor can sense the magnetic pole of the magnetic ring to achieve position detection, the motor can remove the sealed connection, the Hall seal cover is small in size, thin in thickness, light in weight, easy to disassemble, improves reliability and maintainability, and can be widely used for various motors.
Owner:BEIJING SHUGUANG AERO ELECTRICAL
An elevator information belt detection system
The invention discloses an information tape detection system for an elevator, comprising: a frame; a simulation device capable of installing an information tape and simulating the movement of an elevator car, which includes a first rotating wheel, a second rotating wheel and a first rotating wheel capable of driving wheel or the driving unit of the second rotating wheel, wherein the first rotating wheel and the second rotating wheel are connected together by an information belt. The two information readers are arranged on the frame, and each position of the information tape is correspondingly stored with corresponding position information, and the two information readers respectively read the corresponding information tape position information from the information tape. The central controller is connected with the drive unit, which is used to control the steering and rotation speed of the drive unit. The central controller is also connected with two information readers, and is used to receive the two positions of the information tape read by the two information readers. information. The invention solves the technical problem that the prior art cannot provide fast, accurate and effective information tapes.
Owner:北京北一法康生产线有限公司
Alternating pole brushless permanent magnet motor and electronic power steering system based on the motor
ActiveCN105141099BReduce usageLow costMagnetic circuit rotating partsElectrical steeringElectric machineElectrical polarity
The invention discloses an alternating pole brushless permanent magnet motor, which is used in an electronic power steering system. The motor includes: a stator core in the shape of a hollow cylinder, the inner wall of which has slots, and the stator windings are placed in the corresponding stator slots. Inside; the rotor core in the shape of a hollow cylinder is coaxially sleeved in the central through hole of the stator cylinder, and its outer surface is provided with a plurality of slots, and the number of slots is half of the number of poles in the operating magnetic field of the motor; and a plurality of Magnetic steel, which is placed in each slot of the rotor core in one-to-one correspondence, and the polarity of the magnetic steel in adjacent slots is the same, so that the rotor magnetic steel only has a single polarity, forming a salient pole structure, thereby reducing the amount of permanent magnets while maintaining the output torque of the motor. The invention also discloses a corresponding electronic power steering system. The device of the invention optimizes and improves the rotor structure of the permanent magnet motor, reduces the permanent magnet consumption of the motor rotor and can save the position sensor of the power steering system.
Owner:HUAZHONG UNIV OF SCI & TECH
Electric equipment and its motion control method
ActiveCN106502285BImplement position detectionAchieve speed controlSpeed/accelaration control using electric meansControl engineeringElectric machinery
This application relates to electric equipment and its motion control method. The equipment includes: a control processing module; a motor; a transmission module controlled by the motor; The control processing module; the limit module is used to limit the limit position of the transmission module and feed back the limit position to the control processing module; the control processing module is used to analyze the speed information of the motor according to the current signal and the motor parameters of the motor. Limit position and speed information determine the current position of the transmission module, and control the driving parameters of the motor according to the current position. By analyzing the motor current information, the motor speed information is extracted from it, and then the current position of the transmission module is calculated according to the limit position. In the whole process, the position detection can be realized without adding additional hardware, and the speed control of the transmission module can be realized. It is possible to work stably and safely.
Owner:NANJING MINDRAY BIO MEDICAL ELECTRONICS
A wireless positioning method and system for underground space
ActiveCN110022530BImplement position detectionLow costParticular environment based servicesPosition fixationEngineeringComputer vision
The invention discloses a wireless positioning method and system for an underground space. The wireless positioning method comprises the steps of arranging wireless access points in the underground space, and constructing a fingerprint database; acquiring RSSI information of the position of the target object, matching the RSSI information with the fingerprint database to obtain a predicted value of the position of the target object, acquiring inertial data, and performing track reckoning to obtain a measured value of the position of the target object; adopting Kalman filtering to fuse the predicted value and the measured value to obtain the position of a target person; and when no target object exists in the underground space, processing the CSI data sent by the wireless access point, anddetecting whether illegal invasion exists in real time. According to the method, the RSSI fingerprint positioning and the PDR positioning are fused through Kalman filtering, respective defects of theRSSI fingerprint positioning and the PDR positioning are overcome, and accurate positioning in narrow, closed and long-distance underground space can be achieved; only a small number of wireless access points need to be deployed and combined with widely applied smart phones, the cost is low, and the operation is simple.
Owner:HUAZHONG UNIV OF SCI & TECH
A material conveying and automatic loading and unloading system for main bearing cap processing
ActiveCN110509101BEnough operating spaceImprove work efficiencyMetal working apparatusRobot handControl engineering
The invention provides a material conveying and automatic feeding and discharging system for processing a main bearing cap. The material conveying and automatic feeding and discharging system comprises three station conveying lines arranged in parallel; the station conveying line in the middle is a manipulator automatic feeding and discharging conveying line; the two station conveying lines positioned on the two sides are manual feeding and discharging conveying lines; a robot station is arranged on the manipulator automatic feeding and discharging conveying line; an automatic feeding and discharging robot is arranged at the robot station; manual operating stations are correspondingly arranged on the two manual feeding and discharging conveying lines; and front side and back side detectionthree-dimensional turntables are separately corresponding to the robot manual feeding and discharging conveying line on one side of the robot station and corresponding to the two manual feeding and discharging conveying lines on sides of the two manual operating stations. Through the reasonable layout of the conveying lines, the way of cooperation of the robot automatic conveying line and the manual conveying lines is adopted, so that on one hand, the operation convenience can be ensured, on the other hand, on the premise of controlling the cost, the processing and production efficiency of the engine main bearing cap is effectively improved.
Owner:XY HUST ADVANCED MFG ENG RES INST +1
Laser following type position detection system and method
The invention provides a laser following type position detection system, which comprises a following actuating device, a laser distance measuring sensor, a grating ruler and a grating reading head, and is characterized in that the grating ruler and the following actuating device are arranged in parallel; the laser distance measuring sensor and the grating reading head are arranged on the following actuating device and perform linear reciprocating motion through actuating of the following actuating device; the laser distance measuring sensor and the grating reading head are installed at the same position of the following actuating device, and the laser distance measuring sensor and the grating reading head are oppositely arranged. The grating reading head faces the grating ruler, and the linear displacement of the laser distance measuring sensor is obtained through the grating ruler and the grating reading head. The invention further provides a laser following type position detection method. According to the laser following type position detection system and method provided by the invention, following type detection can be carried out, the structure is simple, the cost is low, the detection precision is high, and the use is convenient.
Owner:SINO-BIOCAN BIOLOGY TECH (SHANGHAI) LTD
Rotor position detection method of brushless DC motor based on single-phase inductance detection
InactiveCN109687779BImplement position detectionEasy to driveTorque ripple controlAC motor controlPhase currentsDriving current
The invention relates to a brushless direct current motor rotor position detection method based on single-phase inductance detection. The brushless direct current motor rotor position detection methodincludes the following steps that a detection vector with the time duration being delta T1 is applied to a motor stator winding, the detection phase current is sampled at the beginning and end of vector application correspondingly, and the current change rate is obtained through subtraction of two values; a driving vector with the time duration being delta T2 is applied to the motor stator winding to drive a motor to run; induction energy is released slowly and the motor driving current is maintained by applying a circulation follow current vector in the remaining time of the control period;the variation trend of frac{d}{d<t>} is judged; and the execution steps are repeated continuously after a motor rotor passes through a switching point, and the motor rotor is switched to the next section after waiting for a delay at an electrical angle of 30 degrees.
Owner:天津卓业科技发展有限公司
A laser-based anti-lift detection system and method
ActiveCN106829742BEnables real-time location detectionImplement position detectionLoad-engaging elementsAutomatic controlLaser scanning
Owner:CATHAY NEBULA SCI & TECH CO LTD
An incremental linear rotation two-degree-of-freedom position detection device
ActiveCN105973281BReduce volumeGuaranteed accuracyConverting sensor outputAngular degreesDegrees of freedom
An incremental linear rotation two-degree-freedom position detecting device comprises an integrated cup-shaped code disc, photoelectric sensors, a linear rotation bearing and a housing and is characterized in that the integrated cup-shaped code disc is a cup-shaped structural body made of acrylic material, the bottom of the cup-shaped structural body is a disc with a central hole, m black and white strips are marked along the circumference direction of the disc, n black and white strips are marked along the axial direction of the cylindrical outer wall of the cup-shaped structural body, and the photoelectric sensors comprise a reflected light type linear displacement photoelectric sensor and a transmitted light type rotation angle displacement photoelectric sensor. The incremental linear rotation two-degree-freedom position detecting device realizes linear and rotation two-degree-freedom position detection, reduces the sizes of position sensors and ensures the precision of linear and rotation two-degree-freedom position detection.
Owner:SOUTHEAST UNIV
A motion position detection mechanism and x-ray imaging equipment
ActiveCN103363932BImplement position detectionMeasurement devicesPhotographyFixed frameClassical mechanics
The invention discloses a movement position detection mechanism, which comprises a fixed frame, which is used to be fixed on one of the moving parts and the running track; the roller shaft is rotatably fixed on the fixed frame; and the roller is fixed on the roller shaft. On, the surface of the roller is used to be in contact with the surface of the other of the moving part and the running track, and when the moving part moves, friction is generated between the roller and the contact surface of the other of the moving part and the running track Force, the roller rolls under the action of friction force, and drives the roller shaft to rotate; the position sensor, connected with the roller shaft, rotates under the driving of the roller shaft, and outputs the position signal of the moving part. The invention also discloses an X-ray imaging device. The invention uses the rolling friction force of the moving parts to rotate a roller fixed on the position detection mechanism, and converts the rotation of the roller to the position sensor, thereby realizing the position detection of the moving parts.
Owner:SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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