320results about How to "Accuracy is easy to guarantee" patented technology

The invention discloses a medium wave infrared continuous zoom lens. The medium wave infrared continuous zoom lens comprises a first lens group with positive diopter, a second lens group with negative diopter, a third lens group with positive diopter, a fourth lens group with negative diopter, a first reflector for turning back a light path, a flat plate reference source for correcting a background, a fifth lens group with positive diopter and a sixth lens group with positive diopter from an object space to an image space, wherein the first lens group serving as a front fixing group comprisesa crescent silicon positive lens of which the convex surface faces the object side and a crescent germanium negative lens of which the convex surface faces the object side; the second lens group is used as a zoom group; the third lens group is used as a compensation group; the fourth lens group is used as a rear fixing group; the fifth lens group is used as a relaying group; and the sixth lens group is used as a focusing group. The medium wave infrared continuous zoom lens can be applied to 640*512-element or even larger surface array refrigeration medium wave detectors; and the medium wave infrared continuous zoom lens has a simple structure and low motion charge; and only two lenses move during zooming.

The invention discloses a spiral bevel gear cutting machine tool and a gear cutting method. The gear cutting machine tool comprises a cutting tool system, a workpiece system, a machine tool body and a numerical control system, wherein the cutting tool system comprises an XZ working table, an X-axis lead screw, a Z-axis lead screw, a short shaft, a tool base revolving drum, a tool base, No.1 milling cutters, a milling cutter shaft, No.2 milling cutters, a gear shaft and a correcting wedge. The rotating centre line of the tool base revolving drum and the rotating centre line of the short shaft are collinear; the right end surface of the tool base revolving drum is fixedly connected with an annular flange plate at the left end of the tool base by the correcting wedge; the right end of the tool base is provided with the milling cutter shaft; the rotating centre line of the milling cutter shaft and the rotating centre line of the short shaft are intersectant; and both ends of the milling cutter shaft are provided with the No.1 milling cutters, the No.2 milling cutters or grinding wheels. The left end surface of the tool base is provided with a drive motor; the drive motor is meshed with a bevel gear on the milling cutter shaft by the gear shaft; and the rotating centre line of the output shaft of the drive motor and the rotating centre line of the milling cutter shaft are vertically intersectant. The invention also provides a method for processing helical bevel gears by utilizing the machine tool.

The invention discloses the laser testing method of the roller bearing vibration displacement. Equip the bearing on the spin axis of the test bed; makes use of the reflection of the laser through the bearing surface to arrive the PSD sensor surface; the PSD position sensor gives the facula position. The internal loop and the main axis of the bearing can be viewed as the rigid body because the radial force carried by the external loop of the bearing. When the spin axis spins, the inner and the external loops and the roller bring about the vibration and reflect the displacement s of certain point of the bearing surface by the PSD sensor. The invention has simple structure, clear principle and high precision.

The invention discloses a micro capacitance measurement method and a special device. The device is provided with a sine wave voltage driving source, a current-limiting resistor, a preposed operational amplifier, a feedback resistor, a voltage follower, an amplifying unit, a reference signal generator, a multiplying unit, a low-pass filter, a selective switch and a detection processing unit. The precision and the resolution of the method are high to the micro capacitance measurement.

A synchronous cold/thermal response ground thermal property tester relates to a ground thermal property tester. The invention solves the problem that when an air source heat pump type tester is used to test summer heat removal operating condition and winter heat absorption operating condition during the measurement of the ground thermal property, only one operating condition can be tested once and the test result is not accurate. In the tester of the invention, on the cold response side of a water-water heat pump unit, a cold response side water supply pipe, a cold response side flowmeter, a cold response side supply water temperature sensor, a cold response side U tube, a cold response side return water pipe, a cold response side return water temperature sensor and a cold response side circulating pump constitute a loop; and on the thermal response side of the water-water heat pump unit, a thermal response side water supply pipe, a radiator valve, a fin radiator, a heater valve, an electric heater, a thermal response side flowmeter, a thermal response side supply water temperature sensor, a thermal response side U tube, a thermal response side return water pipe, a thermal response side return water temperature sensor and a thermal response side circulating pump constitute the other loop. The synchronous cold/thermal response ground thermal property tester is used in the measurement of the ground thermal property.

The invention provides a method for calibrating structure light vision transducer based on one-dimensional target drone, the method comprises: calibrating video camera interior parameters; arranging the one-dimensional target drone on different positions to calculate space coordinates of different crosses of one-dimensional target drones on different positions and the light plane as space coordinates of light plane different characteristic points; fitting the light plane equations by the obtained space coordinates of light plane different characteristic points. According to the invention, the structure light vision transducer can be calibrated by arranging the one-dimensional target drone arbitrarily on the position intersected with the light plane, the calibration is flexible, without auxiliary apparatuses.

The invention discloses an aerodynamic loading system and a loading method for aero-undercarriage self-control spring-damping system and belongs to aero-undercarriage control test systems. The aerodynamic loading system comprises a test rack (1), an aero-undercarriage (2), a strutting actuator (3) and a support frame (4), wherein the strutting actuator (3) and the support frame (4) are connected on the aero-undercarriage (2), an aerodynamic loading direction control mechanism controls the direction of aerodynamic load during undercarriage control, and an aerodynamic loading size simulation mechanism controls the size of the aerodynamic load during the undercarriage control. The aerodynamic loading system and the loading method for the self-control spring-damping system is high in loading accuracy, good in loading simulation continuity, concise in structure and applicable to tests of undercarriage control of various planes and can provide corresponding accurate parameters for design and development of aero-undercarriages.

The invention relates to a hydraulic valve, a hydraulic valve bank and a control method thereof. The hydraulic valve comprises a valve body and a valve core, wherein the valve core is arranged in the cavity of the valve body, the valve core is in a split type structure and comprises a first valve core and a second valve core, and a valve pocket can be arranged between the valve body and the valve core. The hydraulic valve bank provided by the invention also comprises a first valve core and a second valve core which form a split type structure, and the valve cores are integrated into a valve block. In the control method of the hydraulic valve and the hydraulic valve bank provided by the invention, oil drain ports R on the valve body or the valve block are simultaneously used as control ports K so as to realize a four-position function. By using the split type valve core structure, the hydraulic valve solves the problems of long matching surface between the valve core and the valve body in the hydraulic valve, difficult accuracy guarantee and inconvenient processing and assembly. Besides, the valve core can not be clamped easily and has high contamination resistance. Additionally, because of the use of the valve pocket, the hydraulic valve has the advantages of good part interchangeability, convenient maintenance and replacement and greatly prolonged overall service life.

The invention discloses a laser coder. It includes one laser source, diffraction grating, polarization beam splitter prism, collimating lens, 1/4 wave plate, objective lens, coding disc, concave lens, cylindrical lens, and photo electricity receiver. The coding disc can rotate around center fixed rotating shaft. And its surface is the laser reflecting surface, and set three sets of information rail which is made up of banded unit. The invention also discloses the laser coder displacement measuring method and digital controlled machine tool processing method.

The invention discloses a light path device and method for laser peening forming of a large workpiece. The light path device comprises a laser device, a dynamic focusing and shape righting system, a scanning galvanometer system, the formed workpiece, a computer, a laser control card and a movement control card. The laser control card is connected with the laser device and is used for controlling starting of the laser device and various parameters of laser. The movement control card is connected with the dynamic focusing and shape righting system and the scanning galvanometer system. Both the laser control card and the movement control card are controlled by the computer. The dynamic focusing and shape righting system and the scanning galvanometer system are controlled by the computer to make corresponding movement after a specific shot blasting path is given, the shape of the section and the focusing position of a high-energy pulse laser beam are changed after the high-energy pulse laser beam emitted by the laser device passes through the dynamic focusing and shape righting system, and then the high-energy pulse laser beam points to a specific emergent direction after passing through the scanning galvanometer system, so that scanning and shot blasting on the large workpiece by laser are achieved through continuous movement of the dynamic focusing and shape righting system and the scanning galvanometer system.

The invention discloses a large and heavy numerical control static-pressure revolving platform. In the invention, a constant-current static-pressure closed guide rail is used for axial unloading and positioning; a constant-current opposed oil cavity is used for radial positioning; a radial damping oil cylinder is used for locking and applying Coulomb frictional damping; a double-lead worm gear isused for precision scale division; a closed loop control system consists of round gratings; and the revolving platform has high scale division accuracy, repeated location accuracy, heavy load and high rigidity and can realize accurate location at any angles and bear heavy cutting load. The large and heavy numerical control static-pressure revolving platform disclosed in the invention mainly comprises six parts of a supporting part, a scale division rotating part, a closed guide rail part, a worm part, a round grating full closed loop part and a radial locking part. The processing and assembling process of the large and heavy numerical control static-pressure revolving platform can improve the accuracy and the production efficiency of the static-pressure revolving platform, reduce the manufacturing cost and meet the requirement of the industrialization of large high-grate numerical control machine tools in China for large and heavy numerical control static-pressure revolving platforms.

The invention provides a circle detection method which comprises the following steps that: an edge map of an input image is obtained; a PHT method is used to detect a circle on the edge map; whether the peak in a parameter space obtained by the PHT is within a suspicious area is judged; if the peak is not within the suspicious area and is higher than the upper limit of the area, back to 'circle exists'; if the peak is lower than the lower limit of the suspicious area, back to 'circle does not exist'; if the peak is within the suspicious area, a small area image in which a suspicious circle corresponding to the current peak is in is copied from the original image; in the small area image in which the suspicious circle is located, the CHT method is used to detect the circle; and whether the circle exists if judged according to the detection results. The circle detection method has well guaranteed speed and precision, and is applicable to actual projects.

The invention provides a small size uncooled dual-field-of-view infrared optical system which comprises a first positive meniscus lens and a detector. A biconcave lens, a second positive meniscus lens, a negative meniscus lens and a third positive meniscus lens are sequentially arranged from the first positive meniscus lens to the detector along the optical axis; the first positive meniscus lens, the second positive meniscus lens and the third positive meniscus lens each have positive diopter, and the biconcave lens and the negative meniscus lens each have negative diopter. Both the curved surface S3 of the biconcave lens and the curved surface S7 of the negative meniscus lens are aspheric surfaces, and the aspheric surface S7 is further provided with a binary diffraction surface. The lenses of different types are reasonably arranged and the positive diopter and the negative diopter of the lenses are selected, so that the whole dual-field-of-view infrared optical system has a smaller size and a larger zooming ratio, has a larger zooming range under the switching conditions of a narrow field of view and a wide field of view, and is suitable for occasions with small size requirements for infrared optical systems.

The invention relates to a medical linear accelerator. The medical linear accelerator comprises a fixed frame, a treatment bed and a rotation device, an entrance/exit hole corresponding to the position of the treatment bed is arranged in the fixed frame, the rotation device is composed of first and second rotation frames, the end portion of the first rotation frame is provided with a central holein consistent with the entrance/exit hole, and the axis of the entrance/exit hole and the axis of an assembling bearing of the first rotation frame are coaxial with the rotation axis of the first rotation frame; the second rotation frame is connected with the first connection frame, the rotation axis of the first rotation frame is vertically intersected with the rotation axis of the second rotation frame; and the second rotation frame is provided with a beam generation device and a beam limiting device. According to the medical linear accelerator, the treatment bed does not move during work, abeam can be input to the human body at any angle in the 3D space, and the accelerator has an automatic isocenter verification function and an automatic beam verification function.

The invention discloses an orthogonal mode adaptor. The orthogonal mode adaptor comprises a coupled cavity and a transverse output end. The coupled cavity comprises at least two coupling sections which are communicated from left to right. The coupled cavity is communicated with the transverse output end in the back direction. In all the coupling sections from left to right, the first coupling section is a rectangular body with the axis in the direction from left to right, wherein the difference between the width and the height of the left end face of the first coupling section is smaller than 20%. The upper surfaces of all the coupling sections are flush. Meanwhile, a rectangular longitudinal output end is an external port, and the normal at the center of the external port coincides with the direction of the normal at the center of the cross section of the first coupling section from left to right. The orthogonal mode adaptor has the advantages that the orthogonal mode adaptor can be easily obtained by conducting milling and cutting through a machining center, and the influence of the assembly error of a cover plate and a base on the device performance is small, and the orthogonal mode adaptor can be widely applied to microwaves especially satellite communication systems of millimeter waves and terahertz frequency bands and other communication systems.

The invention relates to a three-branched-chain six-freedom-degree robot drive mechanism which is mainly and technically characterized in that three branched chains identical in structure are arranged between a movable platform and a fixed platform, a fixed platform motor is arranged on a fixed platform motor support, and the fixed platform motor, second connection rods, first connection rods and the movable platform are sequentially connected; sliding guide rails are evenly distributed on the fixed platform in the circumferential direction, a guide rail top motor is arranged at the top end of each sliding guide rail, a screw rod is arranged in each sliding guide rail through a bearing, sliding blocks are arranged on the sliding guide rails in a sliding mode, and the middle portions of the sliding blocks are meshed with the screw rods in a spiral mode; connection sleeves are arranged on the outer sides of the sliding blocks and connected with the first connection rods in a sliding mode. The three-branched-chain six-freedom-degree robot drive mechanism is reasonable in design, has the advantages of being simple and reliable in structure, stable in movement of the movable platform, and the like, has good drive performance, robustness and bearing capacity, and can be applied to the fields of detection of machine tools and robots according to different needs.

The invention relates to an optimal initial pressure global optimization method for the steam turbine set based on multi-factor, and belongs to the technical field of steam turbine set operation technologies. The method comprises building a quantitative calculation model for steam turbine variable pressure operation consumption differences, obtaining an economic characteristic variation trend in a feasible sliding pressure interval of the steam turbine set under different pitch peak working conditions according to a global variable pressure optimization test, and blending the economic characteristic variation trend with other target parameters of primary frequency modulation characteristics, backpressure characteristics and the like of the set to obtain optimal operation initial pressure of the steam turbine set based on multi-factor to be adapted to power station site actual operation demands and achieve both the power station economy and the power grid safety. The optimal initial pressure global optimization method is applicable to optimal initial pressure global optimization of the steam turbine set.

The invention relates to the field of machining and manufacturing of crankshafts and in particular relates to a multi-cutter head for milling a main journal of a crankshaft and a manufacturing process of the multi-cutter head. The multi-cutter head comprises a spindle, cutter head bodies and cutter head seats, wherein multiple identical cutter head bodies provided with multiple blades are fixed on multiple cutter head seats through which cutter teeth of the cutter head bodies are staggered through straight end-face keys and the multiple cutter head seats have certain angle; the multiple cutter head seats are and connected and locked onto the spindle through round keys; a detachable adjusting cushion block is arranged between every two cutter head bodies. According to the multi-cutter head, the cutter head bodies are connected with the cutter head seats, cutter teeth of each cutter head body are staggered, the distance between every two cutter head bodies can be adjusted by the rapidly detached adjusting cushion block arranged between the cutter head bodies, thus the multi-cutter head is convenient and ingenious, rigidity of serially cutter groups and the cutter head bodies are guaranteed from the structure, each cutter head is uniform in stress and small in vibration during milling, interrupted cut is met, the production efficiency is high, the machining efficiency is high, the precision is easily guaranteed, and the multi-cutter head is long in service life.

The invention discloses a profile straightening machine which comprises a hydraulic system, a control system, a feeding roller way, a pressure straightening mechanism, a rolling straightening mechanism and a discharge roller way; the feeding roller way, the pressure straightening mechanism, the rolling straightening mechanism and the discharge roller way are sequentially arranged back and forth; the rolling straightening mechanism is composed of a rack I, a lathe bed I, a straightening roller, an oil cylinder pressing mechanism, a main transmission mechanism and a displacement measurement mechanism; the oil cylinder pressing mechanism provides a pressing force; an upper roller can carry out up and down displacement along the guide rail surface of the rack I; the opening quantities of the upper roller and a lower roller are regulated to carry out straightening movement on a workpiece in an up and down direction; the pressure straightening mechanism is composed of a lathe bed II, a horizontal oil cylinder, a movable pressure block, a fixed stop dog and a position sensor to carry out bending on the workpiece in a horizontal direction; and the discharge roller way is a liftable roller way. Compared with the traditional workpiece straightening machine, the profile straightening machine is reasonable in structure design, convenient to operate and high in shaping efficiency and shaping accuracy.

The invention relates to a high-precision high-acceleration low-frequency sinusoidal vibration system which comprises a rotating motor, a crank disc, a crankshaft, a horizontal rolling guide rail, a vertical rolling linear bearing, an upright post, a worktable, a balance weight and a position sensor, wherein a left guide post and a right guide post are arranged on a base; a left linear bearing and a right linear bearing are respectively arranged on the left guide post and the right guide post and can move up and down on the guide posts; two ends of a transverse beam are respectively connected with the left linear bearing and the right linear bearing; the horizontal rolling guide rail is fixedly connected to the transverse beam; a horizontal guide rail slide block can move from left to right on the horizontal rolling guide rail; and the upright post and the worktable are arranged on the transverse beam. According to the mechanical system, high-precision and high-acceleration low-frequency sinusoidal vibration can be realized, the defects of a centrifuge test are overcome, the flexibility of research trial is improved, the problems that a low-frequency section of the conventional vibration table is low in vibration amplitude and vibration frequency precision, the testing requirements of a high-precision inertia type instrument cannot be met and the like are solved, and a high-order error item coefficient of the inertia type instrument is tested.

The invention belongs to the field of micro-opto-electro-mechanical systems and particularly relates to a measurement system ad method of the amplitude of a resonant type scanning mirror. The system comprises a laser, a tool clamp used for fixing the laser and a to-be-measured scanning mirror, a photosensitive fixed scale and at least two photoelectric detectors arranged on the photosensitive fixed scale. Laser rays irradiate into the center of the to-be-measured scanning mirror. Incidence light is reflected by the to-be-measured scanning mirror so that scanning paths are formed. The photoelectric detectors capture electrical signals of respective position of reflection light generation marks. According to the electrical signals obtained in the step 3 and the position relation of the photoelectric detectors, the vibration amplitude of the to-be-measured scanning mirror is obtained. By use of the photoelectric detectors for detection, the measurement quantity of the system is reduced and a problem of low measurement precision when the photoelectric detectors are used for measuring and calculating the amplitude of the to-be-measured scanning mirror is solved.