15results about How to "Small damping" patented technology

The invention discloses an immersive cinema dynamic content adaptation control method based on multi-modal fusion, and the method comprises the steps: collecting at least one non-contact physiological signal of a target audience seat area in real time, the physiological signal comprising a respiratory wave signal collected by a millimeter wave radar or a photoplethysmography signal collected by a near-infrared photoelectric sensor; performing time-frequency analysis on the physiological signal, and extracting a physiological wake-up characterization value in a current time window; the physiological wake-up characterization value comprises a heart rate variability change rate and a heart rate deviation value; constructing a dynamic damping adjustment model, and calculating a virtual damping coefficient of the seat movement system at the current moment based on the physiological wake-up characterization value; and the virtual damping coefficient is converted into an execution instruction of a seat motion controller, and damping force output of the motion platform is adjusted in real time. The technical problem that the pre-programmed motion feedback is disjointed with the real-time physiological and psychological state of the audience can be solved, the experience adaptability and comfort of the cinema seat are improved, and the system safety is improved.

The invention provides a photoelectric sensing inertial sensor and a manufacturing method thereof, and the sensor comprises a semiconductor substrate which is internally provided with an annular cavity; a light conduction device is arranged in a circle defined by the annular cavity and is used for transmitting light to the inner side wall of the circumference of the annular cavity along the radius; the light source is used for emitting light rays vertically emitted to the circumferential plane of the annular cavity; a modulation device is arranged in a vertical projection area of the light source to the plane where the light conduction device is located and used for modulating a light source beam to the radius direction of the annular cavity; the light receiving devices are uniformly arranged on the circumferential side wall of the outer side of the annular cavity; and the inertial body is located in the annular cavity and can rotate around the annular cavity, and when the inertial body rotates to the position of a certain light receiving device, the inertial body can shield the light receiving device to receive light beams. According to the invention, the miniaturization of the sensing device is realized, the manufacturing cost is greatly reduced, the comprehensive damping is small, the test error is low, and the impact resistance is higher.

The invention relates to a gas injector for blowing in gaseous fuel, comprising: a magnetic actuator (2) having an armature (20), an inner pole (21) and a coil (22); a closing element (3) having a valve needle (30) and an armature bolt (23), the valve needle (30) releasing and closing a gas path (14) on a sealing seat (11) arranged at a first end of the gas injector, the armature (20) being connected to the armature bolt (23) and the armature bolt (23) being operatively connected to the valve needle (30); a closed lubricant chamber (4), which is filled with a lubricant and in which the armature (20) and the armature bolt (23) are arranged, the lubricant providing a lubricating action in the lubricant chamber (4); a restoring element (10) which resets the closing element (3) into a closed starting position, in which the lubricant chamber (4) is filled with a gas and a liquid lubricant for damping during the movement of the closing element (3), and in which the volume ratio of the liquid to the gas is in the range of 70% / 30 to 95% / 5%.

The utility model discloses a contact of a vacuum arc-extinguishing chamber, which belongs to the technical field of power transmission and transformation, and comprises cams, a plurality of cams are arranged in a ring sleeve, the cams surround the contact, the contact is arranged in the ring sleeve, the contact and the ring sleeve are coaxial, sliding sleeves are arranged on the cams in a sliding manner, a plurality of sliding sleeves are abutted against the outer wall of the contact, and the sliding sleeves are arranged on the outer wall of the contact. An anti-skid rubber pad is arranged on the face, making contact with the contact, of the sliding sleeve, and the bottom of the ring sleeve is in threaded connection with a bottom plate. The adjusting assembly is used for adjusting the relative height of the sliding sleeve on the cam; the positioning assembly is used for limiting the contact; according to the utility model, impurities can be effectively prevented from influencing the discharge stability of the contact.

This invention discloses a highly sensitive detection device and method for immersion-type ultrasonic signal detection in liquids. The invention provides a circular diaphragm with concentric corrugations and a center-thinned structure, and uses this diaphragm as a reflective surface of an optical interference cavity to construct a highly sensitive detection device for immersion-type ultrasonic signal detection in liquids. The diaphragm, used to sense ultrasonic signals, has identical concentric corrugations and a center-thinned structure on both sides, enabling the diaphragm to achieve higher mechanical sensitivity without significantly reducing its natural frequency. The concentric corrugations effectively release initial residual stress introduced during processing and packaging, reducing surface warping and baseline drift. Simultaneously, a replaceable acoustic membrane is constructed in front of the diaphragm, achieving high sound transmission and anti-contamination under long-term immersion in liquid conditions. This detection device can be directly placed in the liquid for detection, improving the sensitivity of ultrasonic signal detection while maintaining a wide frequency range, preventing contamination of the detection element, and ensuring the long-term stability of the detection device.

This invention discloses a method and apparatus for determining the optimal position of the shaft damping controller in a grid-type doubly-fed induction generator (DFIG). A damping controller based on rotational speed signals is added to different control loops. The differences in shaft damping caused by adding the damping controller to different control loops are compared based on the root locus diagram of the DFIG. Results show that implementing the damping controller in the active power loop reduces transmission system damping compared to the voltage loop. Furthermore, applying the damping controller to the q-axis voltage provides a better damping enhancement effect than applying it to the d-axis voltage.

The utility model discloses a motorcycle front magnetorheological damper and motorcycle, including working cylinder, guider assembly, piston assembly, floating piston assembly, magnetorheological fluid, outer tube support assembly, ECU control unit and sensor, guider assembly, piston assembly and floating piston assembly are located in the inside of working cylinder, and piston assembly includes built -in solenoid and damping passage, and damping passage penetrates the upper and lower end of piston assembly, and magnetorheological fluid fills the working cavity between guider assembly and floating piston assembly, and, outer tube support assembly is at least partially coated in the outside of working cylinder, and is connected with guider assembly, and ECU control unit and solenoid electric connection are used for the signal adjustment input to solenoid's current according to sensor, like this through solenoid and the combination of magnetorheological fluid, ECU control unit can real -time regulation magnetic field intensity, change the viscosity of magnetorheological fluid to dynamic control damping force.

This invention relates to the field of grid converter control technology, and more particularly to an adaptive hybrid synchronization control method for a grid converter, comprising an active power outer loop controller, a hybrid synchronization control link, and an adaptive link; the system control angular frequency in the active power outer loop controller serves as the system control angular frequency input to the adaptive link; the adaptive angular frequency adjustment output by the hybrid synchronization control link is connected to the active power outer loop angular frequency of the active power outer loop controller; and the adaptive link outputs the hybrid synchronization adaptive gain of the hybrid synchronization control link. This invention can adaptively adjust the equivalent damping of the system according to the system state, ensuring a sufficiently fast power step response during normal system operation, and providing sufficient equivalent damping to ensure transient stability when the system enters a fault state.

The application discloses a reef limestone underground chamber damping system and belongs to the field of damping devices. The reef limestone underground chamber damping system comprises an elastic bearing assembly, micro-grouting hole pipelines, composite variable resistors and pressure sensors. The elastic bearing assembly comprises basalt micro-tendon and stainless steel energy dissipation nodes. A plurality of basalt micro-tendons form a constraint network along the circumference and axis of the chamber on the inner wall of the chamber. The stainless steel energy dissipation nodes are arranged at the intersection connection between the basalt micro-tendons. A plurality of micro-grouting hole pipelines are arranged in the constraint network along the axis of the chamber. The pressure sensors are embedded in the rock above the chamber. A plurality of composite variable resistors are arranged at the arch foot of the chamber. The three-stage collaborative mechanism of "basalt micro-tendon constraint-SMA-MRF collaborative energy dissipation-SMA heating phase change recovery and micro-grouting" solves the adaptability bottleneck of traditional anti-seismic technology in reef limestone underground space, and improves the anti-seismic performance and long-term service reliability.

This invention relates to the field of suspension system technology for engineering vehicles, and discloses a hydropneumatic suspension system and a tracked engineering vehicle, including a front suspension cylinder, a middle suspension cylinder, a rear suspension cylinder, a front swing arm, a middle swing arm, a rear swing arm, a buffer cylinder, a tensioning cylinder, a brake arm, and an eccentric shaft; one end of each of the front, middle, and rear suspension cylinders is hinged to the vehicle frame, and the other end is hinged to the front, middle, and rear swing arms, respectively; a tensioning cylinder cylinder seat is fixedly connected to the rear of the cylinder barrel of the tensioning cylinder, and the cylinder barrel of the buffer cylinder is placed inside the tensioning cylinder cylinder seat, allowing it to swing within the tensioning cylinder cylinder seat; the piston rod end of the buffer cylinder is hinged to the brake arm; the piston rod end of the tensioning cylinder is hinged to the vehicle frame. The beneficial effects of this invention are: it can significantly attenuate the vibration generated during high-speed operation, improve the overall comfort of the vehicle, and ensure that the tracks are tensioned in real time during high-speed operation, preventing slippage and derailment, thus guaranteeing the vehicle's mobility and passability.

The utility model provides a kind of scooter steering damping structure and scooter, it is related to scooter technical field.The utility model provides the steering damping structure of scooter, including and the head tube of body connection, the vertical pipe of rotatablely being arranged in head tube, friction plate, compression component, connecting piece, elastic member and adjusting mechanism;Friction plate is arranged between the inner wall of head tube and the outer wall of vertical pipe, compression component is arranged on the outside of head tube, alternatively, part of compression component is located outside head tube, another part is from the outside of head tube and into the inside of head tube;Friction plate and compression component are connected together along the radial direction of head tube by connecting piece, elastic member is arranged between compression component and head tube, adjusting mechanism is arranged on the outside of head tube;The adjusting end of adjusting mechanism is abutted to compression component, to adjust the compression degree of elastic member by adjusting mechanism.The utility model provides a kind of scooter steering damping structure and scooter, can reduce the dither of steering system, improve the safety of riding.

The application provides a kind of gearbox oil temperature control system, control method and wind turbine unit, gearbox oil temperature control system includes temperature sensor, heater, controller, temperature sensor is set to gear box, the temperature measuring part of temperature sensor is located in gear box, temperature sensor is used to detect the lubricating oil temperature in gear box;Heater is set to gear box, heater is used to heat gear box;Controller is used to control heater to heat gear box according to the oil temperature detected by temperature sensor.The gearbox oil temperature control system of the application detects the lubricating oil temperature in gear box in real time through temperature sensor, the controller can control heater to heat gear box according to the oil temperature detected by temperature sensor, realize the accurate regulation and control of lubricating oil temperature, effectively reduce the damping generated by viscosity increase of lubricating oil in low temperature environment, improve the starting performance and working reliability of gear box in low temperature working condition.

This utility model discloses a rotary gear acceleration mechanism and a vertical axis micro wind generator, including a central shaft of blades and a rotary accelerator. The rotary accelerator includes a planetary gear support, planetary gears, an internal gear ring, a sun gear, and a rotor drive shaft. The central shaft of the blades is fixed to the planetary gear support, which is connected to planetary gears. The planetary gears mesh with the internal gear ring and the sun gear. The rotor drive shaft is fixed to the sun gear. The central shaft of the blades and the rotor drive shaft are coaxially arranged. Unlike previous multi-stage parallel shaft schemes, the input and output shafts of this utility model are coaxially arranged, significantly reducing the radial dimension of the rotary accelerator, resulting in a compact structure and smaller volume. This allows for good adaptation to vertical axis micro wind generators, and also reduces energy loss and damping during transmission, leading to lower starting wind speeds and a wider range of applications.

This invention relates to the field of implantable pressure sensors and discloses a corrugated diaphragm pressure sensor with dynamic pressure adaptation. It includes a sensor housing and a built-in corrugated diaphragm assembly. The corrugated diaphragm assembly comprises a corrugated diaphragm body, a gradient composite layered structure, and a built-in damping adjustment unit. The corrugated diaphragm body has a non-uniform corrugated parameter structure, divided into at least two regions with different parameters along the radial or circumferential direction. The gradient composite layered structure is composed of at least two layers of materials with different elastic moduli. The damping adjustment unit is located on the back of the diaphragm or in the corrugation gaps and can adjust the damping according to the transient rate of dynamic pressure change. This invention achieves adaptation to the dynamic physiological pressure of the human body, possesses miniaturization and high biocompatibility, and solves the problems of narrow dynamic response range and high detection distortion rate of traditional implantable sensors.

The application relates to a material tower taper detection technical field, in particular to a material tower core mold taper part radius real-time determination structure and a winding forming system and method, a wire wheel is arranged on a pull rod, the top end of the pull rod is fixedly connected with an outer rod, the inner side of the outer rod is slidably connected with an inner rod, the inner rod can abut against the surface of the taper part upwards, the bottom end of the inner rod is a piston, a second spring is fixedly connected between the piston and the inner side of the outer rod, a potentiometer is fixedly connected on one side of the inner rod, a fixed block is fixedly connected on the inner side of the top end of the outer rod, the fixed block slides on the potentiometer, the real-time radius of the winding position of the taper part is obtained by obtaining the position of the fixed block on the potentiometer, the pull rod moves rightwards under the driving of a lead screw, the wire wheel moves rightwards synchronously, winding movement is realized, the outer rod bends to one side, so that the middle surface of the inner rod and the wire wheel is in the same plane, and the real-time radius of the winding position of the taper part is obtained by obtaining the position of the fixed block on the potentiometer.