42results about How to "Control offset" patented technology

The invention discloses a laser link communication-measurement composite system. Through adoption of the laser link communication-measurement composite system, the payload weight, size and power consumption can be lowered. The laser link communication-measurement composite system is implemented by the following technical scheme: an optical antenna transmits a comprehensive optical signal to a rapid reflecting mirror through an eye lens at a transmitting end; reflected light splits a light beam of the comprehensive optical signal into two paths through a beam splitter; one path is transmitted into another beam splitter through the beam splitter to transmit the light beam into a coarse tracking module in order to extract a target position coarse miss distance, and a control voltage is applied to a two-dimensional turntable according to an embedded control algorithm; the other path of comprehensive optical signal is introduced into the field range of a fine tracking module through the beam splitter, and transmitted into the fine tracking module to extract a target position fine miss distance, the overall offset of fine field light spots is controlled, the light spots are introduced into the center of a fine tracking field to obtain target angle information, and the extracted target position fine miss distance is transmitted into a ground / satellite platform comprehensive electronic management and processing module to finish target capture and an aiming function and establish a communication link.

This invention describes how to quickly cancel DC offsets that are present in the two quadrature paths of a zero intermediate frequency transceiver. Previously known techniques are not suitable for the 5 GHz WLAN standards because of the very short transmit to receive turn around times and extraordinarily large dc offsets in these systems. This invention solves the above problems. The present invention uses both AC and DC coupling along with automatic gain control techniques to remove unwanted DC offsets within an acceptable time period. The invention further uses a digital signal processor to estimate and subtract out the DC offset errors using time averaged signals. The digital signal processing circuit is capable of further AC filtering and Analog to Digital conversions.

The invention discloses a novel method for designing a child shoe tree ground pattern based on dynamic and static foot models of children. The method comprises the steps of (1) collecting the dynamic and static foot models of the children; (2) extracting sole images from the dynamic and static foot models; (3) determining key points of dynamic and static sole images; (4) measuring the length and width sizes and angles of key portions of the dynamic and static sole images; (5) converting dynamic and static foot model data into shoe tree ground pattern data; (6) determining the shoe tree ground pattern data; (7) drawing shoe tree ground pattern figures. The method has the advantages of ingenious conception, accurate data and good repeatability, the dynamic and static foot model data of a 1: 1 ratio are acquired respectively through a pressure sensor and a three-dimensional laser scanner, and a conversion model for the dynamic and static foot model data and the shoe tree ground pattern data is established based on the difference between the dynamic and static foot models and the rule of the difference, so that the child shoe tree ground pattern capable of better meeting the foot development law of the children is designed, and shoes for the children made according to the child shoe tree ground pattern have higher comfort level.

The invention provides an antenna structure of a mobile terminal with a metal shell. The antenna structure comprises a main antenna, the metal shell and a tuning switch; the main antenna comprises a first feeding point, a first earth point, a first feeding short branch, a second feeding long branch and a first earth branch; one end of the first feeding short branch is connected with the first feeding point, and the other end of the first feeding short branch is connected with one end of the second feeding long branch; the other end of the second feeding long branch is connected with the metal shell; one end of the first earth branch is connected with the first earth point through the tuning switch, and the other end of the first earth branch is connected with the metal shell. According to the mobile terminal with the metal shell and the antenna structure thereof, the main antenna can provide a low-frequency bandwidth ranging from 880 MHz to 960 MHz and a high-frequency bandwidth ranging from 1,710 MHz to 2,690 MHz; a low-frequency resonance can be switched through the tuning switch arranged on the earth end of the main antenna, expanding of the low-frequency bandwidth is achieved, and it is guaranteed that the range of the working frequency applied to the antenna with the metal shell reaches the coverage area of an LTE frequency band of 4G.

This invention describes how to quickly cancel DC offsets that are present in the two quadrature paths of a zero intermediate frequency transceiver. Previously known techniques are not suitable for the 5 GHz WLAN standards because of the very short transmit to receive turn around times and extraordinarily large DC offsets in these systems. This invention solves the above problems. The present invention uses both AC and DC coupling along with automatic gain control techniques to remove unwanted DC offsets within an acceptable time period. The invention further uses a digital signal processor to estimate and subtract out the DC offset errors using time averaged signals. The digital signal processing circuit is capable of further AC filtering and Analog to Digital conversions.

The invention discloses a permanent magnet Halbach linear motor, comprising a primary iron core, a primary winding, a secondary Halbach permanent magnet and a secondary iron core, wherein, an air gap is reserved between the primary iron core and the secondary Halbach permanent magnet; the primary winding is wound on the primary core; and the primary winding passes through three-phase current. The permanent magnet Halbach linear motor also comprises an air gap compensation winding which is wound on the primary iron core in parallel with the primary winding and is connected with a control circuit. The air gap compensation winding can perform d-axis compensation through the control circuit to just offset the effect of armature current to the air gap, thereby effectively realizing the suspension control and stabilizing the height of the air gap. Because the air gap compensation winding is arranged, the permanent magnet Halbach linear motor can easily realize the suspension control of the air gap, and stabilize the height of the air gap while generating stronger suspending force and propulsive force.

In sophisticated semiconductor devices, a strain-inducing semiconductor alloy may be positioned close to the channel region by forming cavities on the basis of a wet chemical etch process, which may have an anisotropic etch behavior with respect to different crystallographic orientations. In one embodiment, TMAH may be used which exhibits, in addition to the anisotropic etch behavior, a high etch selectivity with respect to silicon dioxide, thereby enabling extremely thin etch stop layers which additionally provide the possibility of further reducing the offset from the channel region while not unduly contributing to overall process variability.

The invention provides a weld joint track monitoring system comprising a monitoring assembly, a communication assembly and a data processing assembly. The communication assembly is in communication connection with the monitoring assembly and the data processing assembly. The monitoring assembly comprises an infrared detection device. When to-be-welded parts are welded, the infrared detecting device is used for collecting weld joint infrared images in the welding process. The communication assembly transmits the weld joint infrared images to the data processing assembly. The data processing assembly is used for determining the actual weld joint center line track in the welding process according to the weld joint infrared images and a target weld joint center line track and comparing the actual weld joint center line track with the target weld joint center line track, so that the weld joint track is monitored according to the comparison result. By the adoption of the weld joint track monitoring system, the weld joint infrared images can be collected and processed in real time in the welding process, the actual weld joint center line track can be obtained, so that real-time monitoringof the weld joint track is achieved, and deviation of the weld joint track is effectively controlled.

The invention relates to a high-performance radial tire intelligent vulcanizing machine. The machine comprises a frame, a tire assembly mechanical arm, a pressurization mechanism, a vulcanizing chamber and a mould opening and closing mechanism, a central mechanism, a segmented mold drive device, an intermediate mechanical arm, a two-station four-point type rear inflation device, a tire detachment mechanical arm and a connecting roller way, wherein the frame is of a frame type integrated structure; and a lifting mechanism of the mould opening and closing mechanism adopts roller locking guidance, and a tire storage mechanism is arranged at the front end of the frame. The high-performance radial tire intelligent vulcanizing machine is of the frame type integrated structure, and a cylindrical insulator can be used for realizing pressure transfer, hydraulic and pneumatic pressure transmission and electrical signal control, so that the high automatic dual-mould vulcanizing machine integrated with machine, electricity, hydraulic pressure and pneumatic pressure can be realized. Steam and nitrogen are adopted as vulcanizing media, so that the vulcanizing efficiency and vulcanizing quality of a tire are greatly improved.

The invention provides a construction method of a crushed rock tunnel undercrossing steep slope high bridge pier. Sedimentation and offset of a pier at the tunnel high bridge pier section are effectively controlled, and the safe reliability of the crushed rock tunnel undercrossing steep slope high bridge pier is enhanced. The construction method comprises the following steps: (1) constructing an earth surface anchor cable near a bridge pier slope; (2) constructing a small pilot tunnel advance support far away from the bridge pier side, excavating a small pilot tunnel far away from the bridge pier side, constructing preliminary support and temporary support in the pilot tunnel on the side, and pouring a low wall on the side; (3) constructing advance support in a longitudinal first section range; (4) constructing a small pilot tunnel advance support near the bridge pier side in the longitudinal first section range, excavating a small pilot pier near the bridge pier side, constructing preliminary support and temporary support in the pilot tunnel on the side, and pouring a low wall on the side; (5) excavating middle core soil in an upper step, a middle step and a lower step, and excavating and constructing a temporary inverted arch in the upper step; (6) constructing an arch secondary lining timely in the longitudinal first section range; (7) sequentially constructing a longitudinal second section according to the step (3) to the step (6); (8) sequentially constructing a longitudinal third section according to the step (3) to the step (6) and completing tunnel undercrossing high bridge pier section construction.

The invention relates to the field of foundation pit engineering enclosure structure construction, in particular to a construction method for a RJP utilized reversely built enclosure structure. The method comprises the following steps that grouting reinforcement treatment is conducted on surrounding stratums of an existing pile foundation and an existing bearing platform within the foundation pitengineering influence range through sleeve valve pipes; RJPs are constructed on the side, invading the enclosure structure, of the existing pile foundation; secant pile enclosure structures on the twosides of the existing pile foundation are constructed, and it is ensured that reinforced concrete piles are occluded with the RJPs; a soil body around the existing pile foundation is excavated, and anewly-added pile foundation and a newly-added bearing platform are constructed; and the site is restored, and other secant piles and foundation pit side walls are constructed. The construction of thefoundation pit enclosure structure can be completed under the condition of intrusion of the adjacent existing pile foundation, the stratum reinforcing strength requirement is met, the waterproof andstress problems are solved, the pile forming quality can be effectively guaranteed, disturbance to an existing building (structure) can be effectively reduced, and sedimentation and deviation of surrounding stratums and pipelines are effectively controlled.

The invention discloses an oil-driven bevel-gear differential-speed-type multi-rotor agricultural spraying aircraft, and relates to the technical field of agricultural-utilization unmanned aerial vehicles. The oil-driven bevel-gear differential-speed-type multi-rotor agricultural spraying aircraft can achieve the purposes that the loading capacity is large, the flight time is long, the quality of spraying operation is good, the operational efficiency is high, the operational cost is low, the chemical injury brought by chemicals spraying by farmers is relieved, and the labor force is saved. An engine is fixedly connected with a gear or a driving gear of a belt transmission mechanism, a driven gear of a gear transmission mechanism is fixedly installed on a horizontal center shaft of a central bevel-gear transmission case, and first bevel gears of a bevel-gear differential-motion transmission case are fixedly installed at the horizontal center shaft and two central output shafts of the central bevel-gear transmission case correspondingly; and a second bevel gear is in transmission connection with a rotor input shaft of a rotor bevel-gear transmission case of a rotor transmission mechanism, rotors are fixedly installed at two rotor output shafts of the rotor bevel-gear transmission case correspondingly, a worm wheel in a worm wheel and worm transmission mechanism is rotatably installed at the rotor input shaft, and a worm is in transmission connection with an adjustable-speed motor. The oil-driven bevel-gear differential-speed-type multi-rotor agricultural spraying aircraft is used in the fields of agricultural spraying operation, air patrol, air transportation and the like.

The invention relates to a method and system for integral lifting of an asymmetric inner ring truss and a cable dome. The method comprises the steps that the inner ring truss and the cable dome are formed by assembling, and the cable dome is connected with the inner ring truss; a plurality of lifting frames are arranged at intervals along the position where the inner ring truss is to be installedand fixed to the ground, and the lifting frames are connected with each other; a plurality of lifting devices are fixed to the top parts of the corresponding lifting frames, and the lifting devices are connected with the inner ring truss correspondingly; a plurality of traction devices are fixed to the top parts of the corresponding lifting frames, and the traction devices are connected with the cable dome correspondingly; the lifting devices are used to lift the inner ring truss up horizontally, the traction devices are used for stretching the cable dome during the process of lifting the inner ring truss, and radial traction of the cable dome is carried out through the traction devices, so that the horizontal force is applied to the inner ring truss through the cable dome to control the horizontal displacement of the inner ring truss; and lifting of the inner ring truss and stretching of the cable dome are carried out alternately until the inner ring truss reaches the design elevation.

The application relates to a tool for processing a motor casing, which comprises a base shaft, a fixed conical ring, a movable conical ring, a positioning driving piece, a pressure plate and a clamping driving part, the periphery of the fixed conical ring is used for abutting against the inner wall of one end with smaller diameter of a stator inner hole, and the periphery of the movable conical ring is used for abutting against the inner wall of one end with larger diameter of the stator inner hole; and the clamping driving part is used for driving the pressing disc to abut against the product, so that the inner hole wall of the stator abuts against the periphery of the fixed conical ring, and positioning and clamping are achieved. The axis of the stator coincides with the axis of the baseshaft, positioning and clamping of a product are completed, then positioning and clamping are completed with the axis of the inner hole of the stator as the reference, and the effect of accurate clamping is achieved.

The invention discloses an oil-driven planetary-gear-train differential-speed-type multi-rotor agricultural spraying aircraft, and relates to the technical field of agricultural-utilization unmanned aerial vehicles. The oil-driven planetary-gear-train differential-speed-type multi-rotor agricultural spraying aircraft can achieve the purposes that the loading capacity is large, the flight time is long, the quality of spraying operation is good, the operational efficiency is high, the operational cost is low, the chemical injury brought by chemicals spraying by farmers is relieved, and the labor force is saved. An engine is fixedly connected with a gear or a driving gear of a belt transmission mechanism, the gear or a driven gear of the belt transmission mechanism is fixedly installed on a horizontal center shaft of a central bevel-gear transmission case, and big sun gears of a planetary-gear transmission mechanism are fixedly installed at the horizontal center shaft and two central output shafts of the central bevel-gear transmission case correspondingly; and a small sun gear is in transmission connection with a rotor input shaft of a rotor bevel-gear transmission case of a rotor transmission mechanism, rotors are fixedly installed at two rotor output shafts of the rotor bevel-gear transmission case correspondingly, a worm wheel in a worm wheel and worm transmission mechanism is fixedly connected with a planetary gear, and a worm is in transmission connection with an adjustable-speed motor. The oil-driven planetary-gear-train differential-speed-type multi-rotor agricultural spraying aircraft is used in the fields of agricultural spraying operation, air patrol, air transportation and the like.

The invention discloses a two-dimensional sample plate line segment offset method based on control points, which comprises two steps of control point offset and line segment offset, the control point offset comprises the following steps: S1, setting a plurality of control points to be offset, S2, acquiring a line segment formed by adjacent control points, and calculating an offset value by using a displacement function SHV (P), y1, calculating the offset of each control point on the angular bisector, Y2, determining the offset direction of each control point according to the offset orientation, Y3, correcting each key point, taking left and right adjacent points of the key points as intersection points to correct the key points, calculating offset values among all line segments through a displacement function SHV (P) after data of the key points are obtained, and determining the offset direction of each control point according to the offset direction; y4, checking whether line segments formed by the key points are intersected or not; and comparing the offset value with the line segment offset value until all disjoint offset values are obtained. Through calculation and intersection comparison of the control points and the offset line segments, the offset of the contour line or the internal line is effectively controlled, so that the model effect is more vivid.

The invention discloses a gluing station, which belongs to the gluing technical field. The invention provides the gluing station capable of accurately controlling the gluing position and length. The gluing station comprises a rotation lifting platform, and an annular loop similar with outer ring of a component to be glued and with reduced geometric ratio by 1 / 2 to 1 / 5, several support bars are arranged on a table board on the rotation lifting platform, a locating piece is arranged at top outboard of each support bar, a positioning foot coupled with the locating piece is arranged on the annular loop, two strips of annular channel sections with up and down arrangement and mutual parallel are arranged on annular loop along the outer sidewall of the annular loop, a length positioning annular lamp with slanting irradiation downwards is arranged in one of the annular channel section, an indication block is clamped and connected in the other annular channel section, one side of the indication block shields the length positioning light of the length positioning annular lamp; and the length of the indication block is coupled with the length of glue required by the component to be glued. The gluing station is mainly used in positioning and gluing technology.

The invention discloses an oil-driven differential-speed-type multi-rotor agricultural spraying aircraft of engine central transmission, and relates to the technical field of agricultural-utilization unmanned aerial vehicles. The oil-driven differential-speed-type multi-rotor agricultural spraying aircraft of engine central transmission can achieve the purposes that the loading capacity is large, the flight time is long, the quality of spraying operation is good, the operational efficiency is high, the operational cost is low, the chemical injury brought by chemicals spraying by farmers is relieved, and the labor force is saved. An engine is fixedly connected with a central driving bevel gear of a central bevel-gear transmission case, a central driven bevel gear is fixedly installed on a horizontal center shaft of the central bevel-gear transmission case, and first bevel gears of a bevel-gear differential-motion transmission case are fixedly installed at the horizontal center shaft and two central output shafts correspondingly; and a second bevel gear is in transmission connection with a rotor input shaft of a rotor bevel-gear transmission case of a rotor transmission mechanism, rotors are fixedly installed at two rotor output shafts of the rotor bevel-gear transmission case correspondingly, a worm wheel in a worm wheel and worm transmission mechanism is rotatably installed at the rotor input shaft, and a worm is in transmission connection with an adjustable-speed motor. The oil-driven differential-speed-type multi-rotor agricultural spraying aircraft of engine central transmission is used in the fields of agricultural spraying operation, air patrol, air transportation and the like.

The invention particularly discloses a power transformation framework. The power transformation framework comprises a supporting assembly, a middle cross beam and a connecting cross beam, wherein thesupporting assembly comprises a first supporting piece and a second supporting piece which are arranged at an interval in the first direction; the middle cross beam is arranged between the first supporting piece and the second supporting piece, and comprises a first end and a second end which are opposite in the first direction; and the connecting cross beam comprises a first connecting part and asecond connecting part, the first connecting part is connected with the first end and the first supporting piece, and the second connecting part is connected with the second end and the second supporting piece. Moreover, the space between the first connecting part and the second supporting piece forms a triangular pyramid with the first end as the vertex, and the space between the second connecting part and the second supporting piece forms a triangular pyramid with the second end as the vertex. Therefore, the space of the triangular pyramids is more stable, meanwhile, the specification of the power transformation framework is further miniaturized, and thus the manufacturing cost is reduced.