73results about How to "Reduce position changes" patented technology

An elastically deformable flange locator arrangement includes a first component having a first engagement surface. Also included is a second component configured to be mated with the first component. Further included is a first portion of the second component. Yet further included is a second portion of the second component extending relatively perpendicularly from the first portion proximate a perimeter of the first portion, the second portion having a second engagement surface, wherein the second portion is configured to elastically deform at a first interface upon contact between the first engagement surface and the second engagement surface.

The invention relates to an SVPWM (Space Vector Pulse Width Modulation) control method for a Z-source inverter, belongs to the technical field of inverter control and solves the problem of generation of a larger inductive current ripple caused by the existing SVPWM control method for the Z-source inverter. The states of three switching tubes of an upper bridge arm are represented by eight vectors, and the eight vectors divide a control interval into six sectors. For taking the third (III) sector as an example, the vectors taking actions in Ts in each SVPWM period are allocated sequentially from left to right as 111, 110, 100, 000, 000, 100, 110 and 111, wherein the total acting time of a traditional zero vector is set as T0; the total acting time of a direct-through zero vector is set as t0 which is greater than 0 and less than or equal to T0; and the total acting time t0 of the direct-through zero vector is divided into four sections inserted between the acting times of the traditional zero vector and an adjacent effective vector, thereby realizing SVPWM control of the Z-source inverter. The SVPWM control method is suitable for the SVPWM control of the Z-source inverter.

The invention discloses an on-line measuring system and method for the concentration of NO3 free radicals in the atmosphere based on broadband cavity-enhanced absorption spectroscopy. The on-line measuring system at least comprises a light source controller, a light source, a first convex lens, a second convex lens, a pair of high-reflectivity lenses, a detection cavity, an optical fiber, a spectrometer and a zero-point generator. According to the invention, the pair of high-reflectivity lenses compose a resonant cavity, a LED is used as the light source, and the spectrometer is used as a detector; dynamic zero points are employed for elimination of the influence of other absorbed components on the measurement of NO3 free radicals, so on-line accurate measurement of the NO3 free radicals in the atmosphere is realized. The on-line measuring system and method provided by the invention have the characteristics of low detection limit, high sensitivity, high temporal-spatial resolution, high stability and low cost.

The invention provides a gas sensor probe based on a multi-point reflected spiral light path and a detecting device. A light source module, a spiral light path module and a detector module are included. The light source module is used for emitting parallel light signals. The spiral light path module comprises a plurality of reflection mirrors and a plurality of linear light paths. Each linear light path and the adjacent linear light path are connected in a head to tail mode at a certain angle and are spiral inwardly, and at least one reflection mirror is detachably fixed between the two adjacent linear light paths. The spiral light path module is used to increase a light path length of the light signals, and the light signals pass through the spiral light path module, then enter into the detector module and are converted into electrical signals. Through the design of the multi-point reflected spiral light path, a volume of a sensor probe absorption pool is reduced and a measurement light path is increased, and simultaneously the stability and the reliability of the light path are greatly improved. Debugging difficulty during production is reduced and production and processing costis decreased.

The invention provides for transgenic avians containing nucleic acids which include an exogenous lysozyme gene expression controlling nucleotide sequence which typically is linked to a polynucleotide encoding a heterologous polypeptide.

The invention discloses a winding apparatus that winds thread material to a stator core. In order to make the end of a thread nozzle on an arm moves slightly when the arm changes gesture, when an arm rotating mechanism makes the arm rotate in one direction, a supporting part mobile mechanism rotates synchronously in the same direction with the arm, so that the rotating shaft of the arm rotating mechanism rotates in the same direction by taking a first imaginary thread passing through the thread nozzle as the rotating shaft.

The invention relates to a pineapple picking machine. The pineapple picking machine comprises a liftable mobile trolley, wherein a passage runs through the front and back of the mobile trolley for thepineapple plants to pass through; a circulation picking mechanism is rotationally connected to the front part of the top of the mobile trolley, and a collection box located behind the circulation picking mechanism is fixed to the mobile trolley; a group of picking claws uniformly distributed on the circumference of the moving plane are connected to the circulation picking mechanism and are of a half-enclosed encircling structure formed by rotational connection of side ends of a group of encircling blocks; a pair of shovel blades fixed on the encircling blocks is arranged bilaterally symmetrically on the picking claws, and bottoms of the shovel blades extend downwards and bend towards the front of the encircling blocks to form shovel cutting parts; collection ports matched with the pickingclaws are formed in the front end of the collection box, and travel switches triggered by contact with pineapple are arranged on inner sides of the picking claws. The picking machine has reasonable and compact structure, the pineapple is quickly picked and collected along plants in arrangement of the dense pineapple plants, the pineapple is picked quickly, seamlessly and circularly, the use effect is good, and the picking machine is suitable for popularization.

A first part formed of a first material is positioned to a second part formed of a second material, which is different from the first material in degree of modification due to environmental variation, by contacting surfaces of the first and second parts. At least three projections are formed on the contact surface of the first part along a circle whose center is coincident with a reference point. Grooves are formed on the contact surface of the second part so that the respective projections are fitted therein and that have wall surfaces to which the projections can contact at the inner and outer sides of the projections. The width of the grooves is determined so that the projections contact the inner or outer wall surface of the grooves even when the first and second parts deform in different degrees due to environmental variation.

The invention discloses a single-magnet combined type treatment melting ball for oily sewage, and belongs to the field of sewage treatment. According to the scheme, the sewage treatment melting ballsare put into ther oily sewage, a pre-dissolving layer is promoted to be gradually dissolved under the action of the sewage, calcium oxide powder balls in the pre-dissolving layer are promoted to be incontact with the sewage and react with the sewage, and the dissolving efficiency of oil stains can be greatly improved by means of generated heat and generated calcium hydroxide; meanwhile, by meansof gradual consumption of the calcium oxide powder balls, elastic metal arc strips in the treatment melting balls can be promoted to be unfolded to be arc-shaped under the repulsive action of magnet balls and combined with other elastic metal arc strips to form various magnetic attraction rings with different sizes, and connecting metal ropes are promoted to recover to the high-temperature phase state by means of temperature rise; therefore, the magnetic attraction rings are forced to move under the magnetic attraction effect, and the adsorption effect on particles in the sewage is improved.

A processing system and a method for controlling a processing machine of the system, by which the processing accuracy of the processing machine due to the motion of the robot can be prevented from being deteriorated, without reducing the working ratio of the processing system. A processing machine controller has: a vibration suppression controlling section configured to operate at least one of a table and a processing tool, and calculate an amount of motion correction for reducing the change in a relative position between the table and the processing tool measured by vibration sensors respectively arranged on the table and a tool driving part; a storing section configured to store the calculated amount motion correction; and a program executing section configured to, during the robot performs the predetermined motion, execute the processing program while executing vibration suppressing motion based on the stored amount of motion correction.

The invention discloses a powder weighing device for a mixing station and the mixing station. The powder weighing device comprises a connecting rod (3), a supporting plate (4) and a cantilever beam sensor (5), wherein the supporting plate is connected with a weighing hopper of the mixing station and is connected to one end of the cantilever beam sensor through the connecting rod which is vertically arranged; the other end of the cantilever beam sensor is fixed on a mixing station installation frame (2); end spherical surfaces (31) are respectively formed at two ends of the connecting rod; connecting rod containing cavities (11) which are opposite to each other are respectively formed in the upper surface of the cantilever beam sensor and the bottom of the supporting plate; a spherical wall surface (10) is formed in each connecting rod containing cavity and is in spherical connection with the corresponding end spherical surface of the connecting rod. Therefore, even if the connecting rod slightly tilts, a stressed point, applied to the cantilever beam sensor, of the connecting rod remains at the lowest point of the spherical wall surface of each connecting rod containing cavity, can not be fundamentally changed and can be uniformly stressed, so that the powder weighing device has a stable weighing function and is high in accuracy.

The invention discloses a novel high-precision ultrahigh-pressure water cutting head. The water cutting head comprises a nozzle body, a water nozzle, a sand mixing chamber, a sand blasting pipe, a sand inlet pipe and a high-pressure water switch; a spring chuck is arranged in an inner cavity at the lower end of the nozzle body; the spring chuck comprises a hollow cylinder, and a hollow conical head arranged at the lower end of the cylinder; one end, far from the conical head, of the cylinder is matched and embedded with the inner cavity, and the outer wall is fixedly connected with the nozzle body through a chuck pressing screw cap; the water nozzle, the sand mixing chamber and the sand blasting pipe are matched and sleeved in the spring chuck in sequence; the sand blasting pipe extends out of the spring chuck; a sand blasting pipe pressing screw cap sleeves the conical head; and the sand blasting pipe pressing screw cap comprises a cylindrical end in threaded connection with the cylinder, and a conical end pressed and bonded with the conical head. The water cutting head can reduce the position change of the sand blasting pipe in the wearing part replacement process.

The disclosed imaging device is provided with: a first lens (1); a second lens (2), to which light that has passed through the first lens (1) is incident; an image-side non-telecentric imaging optical system, which contains an imaging element (4) having an imaging surface (4i) that detects light that has passed through the second lens (2); a position-altering unit (a cam mechanism (6) and a motor (8)), which, during exposure, alters each of a first distance between the first lens (1) and the second lens (2), and a second distance between the second lens (2) and the imaging element (4); and a signal-processing unit (9) that generates an image using an electrical signal output from the imaging element (4). The imaging element (4) converts to an electrical signal the light arriving at the imaging surface (4i) during exposure during which the first distance and the second distance are changing.

It is described a winding apparatus for wrapping a material around a core of flat shape that rotates around a rotation axis rotating in its turn with a circular trajectory, controlling the laws of motion both of the core rotation around its axis and of the circular trajectory of its rotation axis, motor driven independently by means of electric cams, such as to cancel the variations of position and speed of the material at the entrance of the core The winding apparatus is used for producing electric energy accumulating devices.

The invention provides an automatic-swinging type covering and uncovering device. The automatic-swinging type covering and uncovering device comprises an upper large beam, a lower small beam, a lifting mechanism, swinging hooks, lifting cables and lifting force reversing wheels. The lower small beam is driven to ascend and descend in the vertical direction through lifting movement of the lifting mechanism, meanwhile descending movement of the lower small beam is converted into upward rotation of the swinging hooks around hinged shafts between the swinging hooks and the lower small beam throughlifting force reversing transmission pairs, and ascending movement of the lower small beam is converted into downward rotation of the swinging hooks around the hinged shafts between the swinging hooks and the lower small beam through the lifting force reversing transmission pairs. Only through the two single actions of ascending and descending of the lower small beam, covering and uncovering actions of a sealing cover can be achieved, applicability and reliability are greatly improved, and a foundation is laid for realizing all-round popularization of the whole-course covering technology of asteel ladle.

A crash structure for attachment to a front subframe for a motor vehicle is provided. The crash structure includes an attachment area and a stiffening structure that reinforces the crash structure in the attachment area for the front subframe. The stiffening structure connects the crash structure to the front subframe in a friction-locked and/or formfitting manner.

The invention provides a contact system with a heat dissipation unit. The contact system comprises a moving contact, a rotary shaft of the moving contact, a jump buckle and a rotary shaft of the jump buckle, and a static contact. The contact system is characterized in that: metallic heat dissipation units are clipped between the rotary shaft of the moving contact and the rotary shaft of the jump buckle, and contacted with the moving contact; the metallic heat dissipation units are clipped on the rotary shaft of the moving contact, the rotary shaft of the jump buckle and reinforcing ribs between the rotary shaft of the moving contact and the rotary shaft of the jump buckle; and each metallic heat dissipation unit is a sheet body of which the thickness is 0.2 mm. In the contact system, under the condition of unnecessarily modifying the original shell, the sheet-shaped metallic heat dissipation units are clipped on the rotary shaft of the moving contact, the rotary shaft of the jump buckle and the reinforcing ribs between the rotary shaft of the moving contact and the rotary shaft of the jump buckle, so that the temperature rise of the whole circuit breaker is reduced, and the heat load capability of the shell of the circuit breaker is improved; and simultaneously, because the metallic heat dissipation units can dissipate the majority of heat generated by the moving contact to the outside, the structure of the moving contact can be reduced correspondingly, and the possibility of optimizing the internal space of the circuit breaker is further improved.

A sealed rolling bearing having excellent sealing ability substantially reliably preventing entry of muddy water into the bearing. A pair of seal grooves (7) is formed in both ends of the bore surface of an outer ring (1), and a seal member (5) is fitted at its outer diameter section to each of the pair of seal grooves (7). An inward facing seal lip (12), formed at the bore of each seal member (5), is made to be in elastic contact with an inner seal surface (10) of a ring groove (9) formed in each end of the outer diameter surface of an inner ring (2). The flatness A in the circumferential direction of that a contact section X of the seal surface (10) with which the seal lip (12) is in elastic contact is set within the range of 5 - 20 [mu]m. Thus, sealing ability of the contact section is enhanced to prevent entry of muddy water etc. into the inside of the bearing.

The invention discloses an image recognition method, device and equipment and a computer storage medium, and the method comprises the steps: obtaining a first image which is a non-first-frame image inan image sequence; under the condition that it is determined that the second image comprises the target object, acquiring first position information of the target object in the second image, whereinthe second image is an image before the first image in the image sequence, and the number of image frames separated between the first image and the second image is smaller than a preset frame number;cutting an image area corresponding to the first position information from the first image to obtain a first cut image; and inputting the first cut image into the first image recognition model to obtain a recognition result of the target object in the first image. According to the embodiment of the invention, the recognition speed of the first image can be improved.

The invention discloses an automatic plastic coating machine for a protective tube of a flexible shaft. The automatic plastic coating machine comprises an inlet tube guide device, a plastic extruder, a water cooling device and a coiling device which are sequentially arranged from the front to the rear. The automatic plastic coating machine disclosed by the invention can be conveniently adjusted, saves labor in adjustment, is high in accuracy in position adjustment, does not influence the field operating environment and normal operation of equipment and also can save manual labor and time, reduce the production cost and improve the working efficiency; a coiling effect is good, the production is not influenced, and the product quality is guaranteed.