15results about How to "Good followability" patented technology

A swingable and rotatable spotlight includes a light source chip and bracket, an elephant trunk-shaped heat sink, a lens, a front ring, a rotating ring, and a face ring. The elephant trunk-shaped heat sink includes a light source cavity, a hook, a cavity clearance groove, a bearing seat, a rotating shaft, a track groove, and a heat sink body. The rotating ring includes a sliding rail, a sliding positioning component, a guide rail located at the upper end, a guide groove with a lower opening, and a shaft groove. The face ring includes a cylindrical body, a positioning tooth groove, an annular track, and a decorative ring plate. The lens is located on a truncated cone body, which is inserted into the light source cavity. The hook and latch are engaged. The light source cavity is inserted into the rotating ring. The bearing seat slides into the guide groove, and both ends of the rotating shaft rotate into the shaft groove. The guide rail and track groove slide into each other and are positioned by friction. The sliding positioning component and positioning tooth groove, as well as the sliding rail and annular track, engage. The guide rail of the rotating ring engages with the track groove of the elephant trunk-shaped heat sink, allowing for swinging without wobbling or axial movement. When rotating, they rotate together, exhibiting good responsiveness.

The application discloses a preparation method of a hydrocolloid dressing for oral cavity, and relates to the technical field of medical supplies. Baicalin extract and a polyvinyl pyrrolidone solution are mixed to obtain a baicalin extract solution; chitosan fibers, hydroxymethyl cellulose and the baicalin extract solution are mixed to obtain a mixed solution; vacuum degassing: the prepared mixed solution is vacuumized, pressure is maintained, and primary degassing is performed; ultrasonic degassing: the mixed solution after primary degassing is subjected to ultrasonic degassing; static degassing: the solution after ultrasonic degassing is sealed by using a preservative film, and is subjected to secondary degassing at room temperature; a PU film is fixed in a film laying frame, the degassed mixed solution is poured into the film laying frame, and the film laying frame is placed into an air-blowing drying box to solidify and form a protective layer, so that the hydrocolloid dressing is obtained. The hydrocolloid dressing prepared by the method has good adhesion, can be used on a wound for a long time, and can effectively promote the repair of damaged cells and wounds, so that the healing of the wound in the oral cavity is promoted.

An image display device and a method for manufacturing the image display device are provided, which improve the tracking accuracy of an optical laminate relative to a three-dimensional curved surface. The image display device according to an embodiment of the present invention includes a transparent member, an optical laminate, and an image display panel. The transparent member has a three-dimensional curved surface. The optical laminate is attached to the three-dimensional curved surface. The image display panel is located on the opposite side of the three-dimensional curved surface relative to the optical laminate. The optical laminate includes a first adhesive layer, a polarizer, and a second adhesive layer. The first adhesive layer is in contact with the three-dimensional curved surface. The second adhesive layer is in contact with the image display panel. The image display device satisfies the following formula (1). R 2 ×(d1+d2) / 1000>310···(1)(In formula (1), R represents the radius of curvature of the three-dimensional surface [mm], d1 represents the thickness of the first adhesive layer [μm], and d2 represents the thickness of the second adhesive layer [μm]. )

A method for planning stair-climbing torque based on multi-pose information fusion first acquires the pose information of the lower limbs when climbing stairs through a pose sensor. Then, based on the pose information of the lower limbs, the motion information of the human lower limbs when climbing stairs is obtained. Next, kinematic calculations are performed on the entire lower limb pose data to obtain the motion information of the human lower limbs, and then the human motion trajectory is obtained. The vertical velocity of the ankle joint is used as the discrimination criterion. When the velocity is greater than a predetermined threshold, an assist phase torque is output and the device outputs torque to follow the human body according to the interactive force data. When the velocity is less than the predetermined threshold, a follow-up phase torque is used and no assist phase torque is output. Finally, the motion controller MCU outputs torque and the knee joint motor executes it. This invention patent utilizes the ankle joint, which has good periodicity and strong noise resistance, to recognize the motion state and improve the stability of state identification. By filtering the human-computer interaction force and the output torque, the accuracy of torque is improved while optimizing the user comfort of the exoskeleton wearer.

This invention discloses a control method for a proportional solenoid valve used in a hydraulic retarder, mainly addressing the technical problems of existing control methods, such as long pressure response time, large overshoot, and poor tracking performance. The control method includes: periodically acquiring the feedback pressure of the hydraulic retarder's working chamber and the input signal of the proportional solenoid valve; determining the current target pressure request state and calculating the current target current of the proportional solenoid valve based on the determination result; calculating the current duty cycle of the proportional solenoid valve; finally, superimposing chatter and outputting the final duty cycle, thereby achieving control of the proportional solenoid valve used in the hydraulic retarder. This control method can achieve precise control of the proportional solenoid valve and has the advantages of short response time, small overshoot, and good tracking performance.

This invention discloses a method for extracting differential signals based on a parallel staircase differentiator, comprising the following steps: S1, inputting the input signal into the parallel staircase differentiator sQ. b (s) Operation module; S2, sQ b (s) The arithmetic module performs operations on the input signal to obtain the first-level signal; S3, iterative calculation is performed, and the first-level signal is passed through the P of the parallel ladder differential n-1 times. b (s) The operation module performs the operation and then inputs it to the adder operation module of the parallel ladder-type differentiator, which adds it to the original (n-1)th level signal to obtain the nth level signal; S4, output the nth level signal, which is the differential signal of the extracted input signal; The parallel ladder-type differentiator of the present invention adopts a parallel ladder structure and uses the method of series partial summation to improve the differential tracking effect. There is no stability problem, and the initial differential peak phenomenon of digital tracking differentiators is avoided. At the same time, the differentiator is implemented using conventional analog circuits, which has higher real-time performance and lower cost than digital tracking differentiators.

The invention relates to a high-precision resonance ball type pressure and temperature integrated sensor, which is characterized in that a resonance ball and a resonance ball fixed support structure are integrally processed, the outer wall of the resonance ball is provided with a resonance ball surface electrode, and the inner wall of a spherical groove on a back cavity structure is provided with a back cavity structure surface electrode; the resonance ball clamped structure and the back cavity structure realize vacuum sealing through a bonding layer, an absolute pressure measurement vacuum cavity is formed between the resonance ball and the spherical groove after sealing, and surface electrodes of the resonance ball are in one-to-one correspondence with surface electrodes of the back cavity structure; a temperature measuring element is arranged on the outer wall of the resonance ball and used for sensing the temperature of the resonance ball in situ, and in-situ temperature error compensation of pressure measurement is achieved. According to the invention, real-time synchronous measurement of pressure and temperature is realized, and in-situ temperature compensation of pressure measurement is also realized, so that the measurement precision, long-term stability and temperature following performance of the pressure sensor are improved.

This application relates to the technical field of building waterproofing and sealing materials, specifically to a sealing strip for waterproofing and sealing gaps in wooden houses, its preparation method, and its application. The sealing strip is made from the following raw materials in parts by weight: 9-17 parts of amorphous α-olefin copolymer, 10-15 parts of low-density polyethylene wax, 5-10 parts of paraffin wax, 22-35 parts of polyisobutylene, 30-42 parts of barium sulfate powder, and 10101 parts of antioxidant. The preparation method includes: sequentially mixing polyisobutylene, amorphous α-olefin copolymer, low-density polyethylene wax, paraffin wax, and half of the barium sulfate powder in a kneader at 120°C; then adding the remaining barium sulfate powder and antioxidant and continuing mixing; after cooling, extruding through a 60°C screw extruder to form a strip arranged side-by-side. This application's adhesive strip can be manually sealed directly in the gaps of wooden houses without tools. After repair, it can be painted or sprayed without maintenance. It can be used directly on damp wooden surfaces or even underwater. It remains soft for a long time and has excellent conformability, solving the problems of existing sealing materials such as long maintenance time, inability to be applied in damp conditions, and lack of conformability.

This invention discloses a group train tracking operation optimization method considering communication delay, comprising the following steps: establishing a heavy-haul railway train group with a "leader-follower" topology; constructing a multi-objective optimization model based on vehicle characteristic constraints, speed limits, and safety distance constraints; generating random communication delays in the model, calculating the time steps corresponding to the delays, and having the following train make control decisions based on the state information of the preceding train at the previous time step; and solving for the running speed of the following train in the multi-objective optimization model using a particle swarm optimization algorithm. This group train tracking operation optimization method effectively solves the problems of uncertainty and dynamic response lag caused by communication delays during the tracking operation of heavy-haul railway train groups. It can not only significantly reduce tracking errors between trains and improve speed synchronization, but also effectively reduce distance fluctuations during acceleration and deceleration phases, ensuring stable train spacing.

The application provides a buoy-shaped double-layer structure wave energy friction nanogenerator, which comprises a buoy shell, an inner layer power generation unit arranged in the buoy shell and an outer layer power generation unit arranged between the inner layer power generation unit and the buoy shell, the inner layer power generation unit is a sliding friction type power generation device and utilizes heaving wave energy to generate electricity, and the outer layer power generation unit is a squeezing friction type power generation device and utilizes pitching wave energy to generate electricity.The application can collect omnibearing wideband wave energy with maximum efficiency through resonance effect and convert the wave energy into electric energy.

The utility model discloses a kind of torsional center of mass stick for seat safety belt fixing point test, it is related to automobile seat safety belt fixing point test technical field, including rubber stick body, the metal stick body connected with rubber stick body both ends, metal stick body is equipped with the fixed block for connecting seat, the connecting hole for connecting loading equipment;A kind of torsional center of mass stick for seat safety belt fixing point test of the utility model, precise transmission of test load and backrest deformation self-adaptation are realized by metal and rubber composite structure, backrest deformation followability is strong, compared with rigid center of mass stick, the interference effect of rigid center of mass stick to seat structure is eliminated, prevent center of mass stick from falling off in test process, improve test efficiency and accuracy.

The utility model discloses a double-shaft tracking support which comprises a double-shaft tracking support body, the double-shaft tracking support body comprises a stand column, and a rotation adjusting assembly is installed at the top end of the stand column. The rotation adjusting assembly is composed of a first rotation driving assembly and a second rotation driving assembly, and the first rotation driving assembly drives the second rotation driving assembly to rotate. The second rotation driving assembly drives the connecting rod assembly to rotate, a control box mounting frame is mounted at the driving end of the first rotation driving assembly, and a control box is mounted on the control box mounting frame. According to the utility model, the rotation of the device in the horizontal direction can be realized through the first rotation driving group, so that the rotation of the photovoltaic module in the horizontal direction is realized; the inclination angle direction of the photovoltaic module can be adjusted through the second rotary driving module; according to the invention, the adjustment of the photovoltaic module in the horizontal direction and the inclination angle direction is realized, so that the following effect of the photovoltaic module is better.

This invention discloses a laser cutting device for the metal casing of a mechanical pressure gauge, relating to the field of laser cutting technology. It includes a base and a rotary drive assembly. The rotary drive assembly is located on one side of the base and includes a slide table on one side of the base. Shaft supports are fixedly mounted at both ends of the slide table, and a worm gear is rotatably mounted inside the shaft supports. This laser cutting device for the metal casing of a mechanical pressure gauge uses a single set of cylinders to drive a V-shaped pin to swing, simultaneously achieving multiple actions such as disengaging the contouring mechanism, aligning the workpiece, positioning the slide table, and adjusting the cutting head angle. It can continuously complete two processes—processing the outer contour and inner ring inclined step of the irregularly shaped casing—at the same workstation, eliminating the need for workpiece transfer, secondary clamping, and positioning steps, and completely avoiding dimensional deviations caused by secondary positioning. This improves overall production efficiency and ensures the overall machining accuracy of the workpiece, making it suitable for mass production of such irregularly shaped pressure gauge casings.

This invention relates to an automatic landing method and system for unmanned aerial vehicles (UAVs). The method includes: acquiring and calculating the position of the UAV based on real-time visible light images and real-time infrared images to obtain a first calculated position and a second calculated position; fusing the ranging distance, the first calculated position, and the second calculated position according to a fusion strategy to obtain a fused position of the UAV, thereby guiding the UAV to land in a target area. The fusion strategy includes: when both the first and second calculated positions are obtained simultaneously, using either the first calculated position or the second calculated position as the fused position based on the error between the first calculated position and the ranging distance; when the real-time visible light images and real-time infrared images are incomplete, and the ranging distance of the UAV is less than a second preset value, using either the first calculated angle or the second calculated angle, along with the ranging distance, as the fused position. The method of this invention can improve the positioning and recognition accuracy and reliability during the UAV landing process.