306results about How to "Precise angle of rotation" patented technology

A motor control device includes: a rotation angle detection portion that detects a rotation angle of a motor and outputs a rotation angle signal; an abnormal condition detection portion that detects the presence or absence of an abnormal condition of the rotation angle detection portion; a rotation angle estimation portion that estimates the rotation angle of the motor and outputs an estimate rotation angle signal; and a driving control portion that controls driving of the motor on the basis of the rotation angle signal, which is output from the rotation angle detection portion, when the abnormal condition detection portion does not detect an abnormal condition of the rotation angle detection portion, and controls driving of the motor on the basis of the estimate rotation angle signal, which is output from the rotation angle estimation portion, when the abnormal condition detection portion detects an abnormal condition of the rotation angle detection portion.

The invention relates to a motor shaking restraining method and device for an electric automobile. The motor shaking restraining method for the electric automobile comprises the following steps: according to the rotating degree and the rotating time of a rotor, calculating the rotating angular speed of the motor; according to the angular speed and the rotary inertia, calculating torque shaking capacity; performing filtering treatment and hysteresis loop comparison on the torque shaking capacity; when the torque shaking capacity reaches the set torque range, obtaining the motor shaking frequency which is the shaking frequency corresponding to the torque shaking capacity; combining the torque shaking capacity with a torque command, and controlling the motor within the shaking frequency. According to the motor shaking restraining method and device for the electric automobile disclosed by the invention, the shaking frequency section of the motor is calculated, and the corresponding torque shaking capacity is combined with the torque command, so that the rotation of the motor is controlled, and the motor shaking of a low-frequency electric automobile is effectively restrained.

The invention discloses a method for locating Mark points on a PCB (printed circuit board) by utilizing an outline gravity center method. The method is characterized by comprising the following steps: on the basis of taking a Mark point extracted in initial programming as a datum point, taking the outline gravity center of the Mark point of the board to be detected, comparing the outline gravity center of the Mark point with the gravity center of the datum point, and performing PCB compensation by virtue of offset between the two gravity centers. The method is used for performing the PCB compensation by extracting the outline gravity center of the Mark point on the PCB and utilizing the offset between the gravity centers of the datum Mark point and the Mark point to be detected. The gravity centers are obtained by binary images and are easy and feasible to obtain. The algorithm is independent from the shapes of the Mark points, is not influenced by the intensity of illumination, achieves sub-pixel-level precision, and is high in compensation precision.

The invention discloses a method for positioning Mark points of a PCB (printed circuit board) by image matching. The method is characterized by comprising steps of using a group of Mark point region images shot during programming as reference images; searching by the aid of the images in a scanning manner when detection is carried out; determining that a detected image contains detected Mark points when the size and the shape of the searched image are identical to those of the reference Mark point images; and finally compensating the PCB by deflection among reference Mark points and the detected Mark points. The method has the advantages that comparison is carried out on the basis of image matching, an algorithm and shapes of the Mark points are irrelevant, compensation precision is high, and the problem of inaccurate welding of the PCB due to the fact that the PCB is deflected when the PCB is compensated and then is welded is avoided.

The invention discloses a multi-shaft drive bending machine which comprises a bending system and an integrated feeding and discharging system. The bending system comprises a horizontal bending drive device. A horizontal bending shaft arranged in the horizontal direction is installed on the horizontal bending drive device. A linkage support is installed on the horizontal bending shaft. An up and down bending drive device is further arranged at the upper end of the linkage support. An up and down bending shaft installed in the vertical direction is installed on the up and down bending drive device. A bending cutter support is installed at the shaft end of the up and down bending shaft. An upper bending cutter and a lower bending cutter are installed at the upper end and the lower end of thebending cutter support correspondingly, wherein the upper bending cutter and the lower bending cutter correspond in upper and lower position. According to the multi-shaft drive bending machine, by means of coordinative matching and adjusting of bending drive, the upper bending cutter and the lower bending cutter can reach different positions, a down pressing drive lifting device cooperates to control down pressing fixing and loosening of an upper pressing cutter and feeding and discharging action of feeding and discharging drive, and bending of bent parts in any shape, at any angle and with any flexible radian is completed.

The invention discloses a packaging machine capable of being applied to the sampling industry. The packaging machine comprises a machine frame, wherein a sample inlet mechanism, an automatic cover pressing device, a sample discharge mechanism, a conveying mechanism and a control system are mounted on the machine frame; a plurality of sealable charge buckets are arranged on the conveying mechanism; the motion trails of the charge buckets on the conveying mechanism are connected in series with the sample inlet mechanism, the automatic cover pressing device and the sample discharge mechanism in sequence; and the bucket covers of the charge buckets are pressed to the tops of the charge buckets through the automatic cover pressing device, and mineral samples in the charge buckets are packaged in a sealed way. The packaging machine has the advantages of simple structure, easiness in control process, high running reliability, low fault rate, good sealing property and the like.

The invention discloses a method for improving programming speed and precision of a soldering robot by using a Gerber file. The method comprises the following steps of: (1) introducing the Gerber file into a programming file; (2) setting Gerber parameters; (3) analyzing the Gerber file, and obtaining a welding layer in a Gerber graph; (4) processing a Gerber welding graph, and constructing a relation between graph coordinates and object coordinates; (5) selecting a welding point to be welded on the processed Gerber welding graph, calculating actual physical coordinates corresponding to the graph coordinates according to the coordinate conversion relation obtained in step (4), and moving a welding nozzle to a position with the actual physical coordinates; and (6) finding actual physical coordinates of other welding points by the method in step (5), and welding. By adopting the method, a camera is not required to shoot a thumbnail, and the programming time is shortened; the rotating angle of a printed circuit board (PCB) can be accurately calculated and can be accurately compensated; the welding precision is improved; and during welding, a phenomenon of inaccurate welding caused by deflection of the position of the PCB can be avoided.

The invention discloses a processing device of a thin-diameter thin-wall metal elbow. The thin-diameter thin-wall metal elbow comprises a base, a guide wheel I, a handle, a guide wheel II and a separation blade, wherein the base is fixedly mounted on a worktable; the guide wheel I is movably mounted on the base and can rotate around the central axis of the base; the handle is mounted on the base by a movable connecting piece and can rotate left and right around the movable connecting piece; the guide wheel II is mounted in a slot arranged in the middle of the handle; the separation blade is fixed on the base and prevents a bent tubular product from radially moving in an elbow-bending process; and molded arc grooves with the same diameter as the bent tubular product are arranged on the guide wheel I and the guide wheel II along the circumferential direction and arranged on the same horizontal line. The processing device has simple structure, convenient mounting, simple and convenient use and operation and good use effect and can process various thin-diameter thin-wall metal elbows with different strength levels; and an elbow-processing process has little influence on the performance of tubular products and has convenient and flexible operation, high efficiency and low cost.

An angle detection circuit of an electrostatic MEMS scanning mirror is provided. The angle detection circuit includes a capacitance sensing unit, a low-pass filter amplifier unit and an angle determination unit. The capacitance sensing unit is coupled to a mirror electrode of the electrostatic MEMS scanning minor for sensing an equivalent capacitance of the electrostatic MEMS scanning mirror and providing a capacitance sensing signal. The low-pass filter amplifier unit is coupled to the capacitance sensing unit for receiving the capacitance sensing signal and providing a position signal. The angle determination unit is coupled to the low-pass filter amplifier unit for receiving the position signal, and determines a rotation angle of the mirror electrode of the electrostatic MEMS scanning mirror to provide an angle signal.

The invention relates to a rotary oil coating mechanism driven by a servo motor, and belongs to the technical field of oil coating. The rotary oil coating mechanism comprises a motor, a speed reducer,a mechanism fixing plate, a rotary plate and oil coating mechanisms. The motor is connected with the speed reducer, the speed reducer is fixed to the mechanism fixing plate, a driving shaft of the speed reducer is connected with the rotary plate, and the two sides of the rotary plate are each provided with one oil coating mechanism. The servo motor is rotated so as to drive two oil coating guns to carry out circumferential spraying operation at specified positions at specified angles, universal position adjusting is precise, the speed and angle of rotation driven by the servo motor are precise, and multithreading control part coating can be achieved.

The invention discloses a robot system for assisting a doctor in operating a colonoscope. The robot system comprises a handle driving mechanism, a colonoscope feeding mechanism, a handle controller pose adjusting mechanism and a pose adjusting driven arm. The handle driving mechanism can replace a traditional mode that a doctor manually pokes an impeller; the rotation angle of the colonoscope tipis adjusted; the colonoscope feeding mechanism can replace a doctor to convey a colonoscope into the intestinal tract of a patient; the handle controller pose adjusting mechanism can adjust the angleand the position of the handle operator to realize convenient colonoscope delivery; the pose adjusting driven arm can adjust the colonoscope to the anus of a patient to realize convenient conveying ofthe colonoscope. The device can replace a traditional mode of manual impeller operation of doctors, a problem that the fingers and the shoulders of the doctors are injured by long-time impeller stirring is solved; meanwhile, the traditional mode of assisting the doctors in operating conveying and opening and closing of biopsy forceps by assistants is replaced, and the purpose that the doctors independently complete colon examination and polyp extirpating work is achieved.

The invention discloses an in-hole cavity monitoring device and method based on multi-frequency ultrasonic scanning. The in-hole cavity monitoring device comprises a rotary driving component, an orientation component, a scanning component, a calibrating component and a reflection component. The invention further discloses an in-hole cavity monitoring method based on multi-frequency ultrasonic scanning, and aims to solve the problems of limit and low accuracy in a single-frequency ultrasonic detection range. Clear waveforms generated by selecting ultrasonic energy converters of two frequencies are comparatively analyzed in order to calculate the number of periods of ultrasonic pulse leak detection respectively, so that the transmission time detection accuracy is increased; meanwhile, the calibrating component and the reflection component are adopted in order to measure a sound speed in an environmental medium to realize high-accuracy measurement of a wave speed; lastly, distance values measured by the ultrasonic energy converters of two frequencies are averaged to obtain an accurate distance. The in-hole cavity monitoring device and method have the advantages of skillful design, strict concept, simple structural system, and easiness in implementation.

The present invention belongs to an angle detection device, belonging to the detection technology field. The angle detection device comprises a rotary transformer and a signal processing device. The rotary transformer comprises at least four leads, where at least two of the leads are excitation leads, and at least two of the leads are signal leads. The signal processing device comprises: an excitation circuit configured to connect with the excitation leads and provide excitation signals for the excitation leads; a signal collection circuit configured to control the signal leads and collect position signals of the rotary transformer from the signal leads; and an angle calculation circuit configured to connect the signal collection circuit and calculate the rotation angle of the rotary transformer according to the position signals emitted by the signal collection circuit. The angle detection device can provide an efficient signal processing technology for an inductance rotary transformer, especially to an inductance rotary transformer having four leads consisting of two excitation leads and two signal leads to obtain accurate rotation angle of the rotary transformer.

A rotational angle detection device has a resolver in which an excitation coil, a first output coil and a second output coil are provided on a periphery of a rotor coupled to a rotation shaft, an excitation signal generator circuit that generates an excitation signal and sends the excitation signal to the excitation coil, and a rotational angle calculation unit that performs sampling for respective output signals of the first output coil and the second output coil in a predetermined cycle, and calculates a rotational angle of the rotation shaft based on two sampling signals obtained as a result of the sampling. The excitation signal generator circuit is of a single excitation mode and generates a single excitation signal.

The invention provides a ring type worktable transfer device with a loading and unloading station and belongs to the technical field of machining. The ring type worktable transfer device with the loading and unloading station comprises a worktable ring mechanism, a workpeice loading and unloading mechanism and a worktable transfer mechanism, wherein a worktable of the worktable transfer mechanismis slidably arranged on a ring track through a worktable roller; locking blocks of a ring driving assembly are uniformly arranged on a first chain; bayonet locks are locked into the slots in the locking blocks; a second chain of the workpeice loading and unloading mechanism is arranged around a third chain wheel and a fourth chain wheel; a first driving pin is mounted on a first pin supporting plate; and a second driving pin of the worktable transfer mechanism is mounted on a second pin supporting plate. The ring type worktable transfer device with the loading and unloading station not only transfers the worktable continuously to feed the worktable into a machine tool and shift the worktable out to shorten the dry running time of the machine tool and improve the production capacity of themachine tool, but also has the loading and unloading station to load and unload workpieces; and the ring type worktable transfer device is reasonable in structure and continuous production of the machine tool is facilitated.

The invention relates to a laser welding device comprising a worktable, a weld fixing device and a control device, wherein the weld fixing device comprises a fixing plate, a vertical plate, a connecting plate, a first motor, a rotating shaft, a workpiece fixing structure, a second motor and a lead screw; the rotation motion of the workpiece fixing structure is controlled through the first motor; and the rotating speed of the workpiece fixing structure is determined by the rotating speed of an output shaft of the first motor. According to the invention, the rotating speed of the first motor can be set to a preset value, so that the accurate rotation angle of the workpiece fixing structure is guaranteed; in addition, the lifting motion of the workpiece fixing structure is realized through driving the lead screw by using the second motor and cooperating with a lead screw nut; the circular motion of the second motor can be transformed into accurate linear motion through the cooperation of the lead screw and the lead screw nut, so that the control of the lifting height can be realized through controlling the rotating speed of the second motor; and therefore, the weld fixing device is capable of effectively controlling the rotation angle and the lifting height of the workpiece fixing structure and welding spots are uniformly distributed during multiple-spot welding.

The invention provides adjustable cutting equipment for melt-blown cloth, and belongs to the technical field of melt-blown cloth processing equipment. The adjustable cutting equipment comprises a cutting machine frame, a melt-blown fabric unwinding device, a melt-blown fabric guiding and tensioning device, an adjustable cutting device, a melt-blown fabric winding device and a rim charge winding device, wherein the melt-blown fabric unwinding device comprises a melt-blown fabric unwinding mechanism and a melt-blown fabric unwinding damping mechanism, the melt-blown fabric guiding and tensioningdevice comprises a guiding mechanism and a tensioning mechanism, and the melt-blown fabric winding device comprises a melt-blown fabric winding mechanism and a melt-blown fabric winding and pressingmechanism. According to the adjustable cutting equipment, cutting and winding of the melt-blown fabric can be stably achieved, the cutting width is adjustable, the width adjusting accuracy is good, and the winding stability and stability are good.

A catheter tip-end rotation angle measurement apparatus includes a motion restriction unit, of a tube shape penetrated from a first hole to a second hole of a catheter on tip end and opposite sides, that restricts the catheter motion to an insertion direction by causing the catheter to pass through from the first to second holes, first and second rotation angle measurement units that measure first and second rotation angles that are rotation angles of the catheter at the first and second holes, a catheter insertion length measurement unit that measures a catheter insertion length, and a catheter tip-end rotation angle calculation unit that calculates the rotation angle of the catheter tip end by using an angle difference between the first and second rotation angles, the catheter insertion length, and a distance between the first and second holes.