31results about How to "Eliminate mechanical vibration" patented technology

The invention relates to an electric-driving transmission device for an electric vehicle and a control method. The electric-driving transmission device comprises a driving motor, a differential mechanism, a first brake, a second brake, a first planetary gear set and a second planetary gear set, wherein the first planetary gear set comprises a first sun wheel, a first planet carrier and a first gear ring, and the second planetary gear set comprises a second sun wheel, a second planet carrier and a second gear ring. An output shaft of a driving motor is sequentially connected with the first sunwheel and the second sun wheel. The first gear ring is connected with the first brake, and the second gear ring is connected with the second brake. The first planet carrier and the second gear ring are connected to form a whole, the second planet carrier is provided with an output support, and the output support is connected with an input shaft of the differential mechanism. Compared with the prior art, the electric-driving transmission device can achieve non power failure in the gear shifting process, is low in control complexity, has relatively low requirements for performance of the drivingmotor, and is high in practicability, compact in structure, small in size, low in weight and low in manufacturing cost.

The invention provides an aeromagnetic survey device based on a low-temperature superconductive SQUID. The aeromagnetic survey device comprises a data acquisition device, a power supply unit, a non-magnetic auxiliary system support, a Faraday cage, a reading circuit and attitude measurement module, a low-temperature superconductive SQUID sensor unit, a non-magnetic Dewar fixation barrel, a vibration absorption material, a non-magnetic device bottom support plate and vibration absorption components. The non-magnetic auxiliary system support and the non-magnetic Dewar fixation barrel are fixed to the non-magnetic device bottom support plate; the low-temperature superconductive SQUID sensor unit is arranged in the non-magnetic Dewar fixation barrel, and the vibration absorption material is filled between the low-temperature superconductive SQUID sensor unit and the non-magnetic Dewar fixation barrel; and the Faraday cage wraps the whole survey device. The aeromagnetic survey device based on the low-temperature superconductive SQUID can improve anti-interference capability of a low-temperature superconductive SQUID system on complicated electromagnetic environment outside a test field, thereby reducing high and low frequency mechanical vibration generated in the aeromagnetic survey process.

A dynamically adjusting surveillance system provides a monitor, a sequence of views that include a key view. The sequence of views is captured by a camera. The monitor can display a portion of the camera view. The system is configured such that the displayed portion of the camera view includes the key view to a driver of the vehicle. The key view can be selected to be a rearward view when the vehicle is not turning, and a view of cross traffic from a side opposite which a turn is made at an intersection.

A dynamic microphone unit includes: a diaphragm that vibrates in response to received sound waves; a voice coil that is fixed to the diaphragm and vibrates together with the diaphragm; a magnetic circuit that generates a magnetic field in a magnetic gap, the voice coil being disposed in the magnetic gap; a resonator that is disposed adjacent to the obverse of the diaphragm; and a noise canceling coil that is fixed to a surface of the resonator so as to face a position of fixing the voice coil, the surface facing the diaphragm. The noise canceling coil is connected in series with the voice coil and has a winding direction different from that of the voice coil.

The invention discloses large-scale POV-LED display equipment and a solution for dynamic balance in the display process. The large-scale POV-LED display equipment comprises one or more odd-numbered abnormal-typed rotary arm which is connected to a rotary arm fixed disk. The large-scale POV-LED display equipment is characterized by further comprising a counter weight end cover, wherein the counter weight end cover is arranged on the end surface of one end, away from the rotary arm fixed disk, of the abnormal-typed rotary arm. A hollow motor group is installed on the end surface of the rear end of the rotary arm fixed disk; the rear end of the hollow motor group is provided with a sliding ring; the rotary arm fixed disk is coincidence with the circle centers of the hollow motor group and the sliding ring. An end cover is designed at the outer end of the abnormal-typed rotary arm; fine tuning is conducted on the weight of the rotary arm individual by separate counterweight, and the overall dynamic balance of the large-sized rotary arm is improved to enhance the stability. The hollow motor group is installed to output kinetic energy, the drive torque is larger, the shortcoming that the stability of direct drive motor single shaft output is not strong is solved, and the better image stability is provided for large-scale suspension transparent display equipment.

A ribbon-type electroacoustic transducer with improved electrical, electromechanical, electromagnetic characteristics is described.

The invention discloses a teaching-used automobile intake manifold absolute pressure sensor teaching and training device, which comprises a training table and a base, wherein the top part of the training table is provided with an open source single chip microcomputer, a supporting device and a prompting device; a vacuum pumping device is arranged on the supporting device; and the vacuum pumping device is connected with the intake manifold through a connection mechanism. According to the teaching-used automobile intake manifold absolute pressure sensor teaching and training device disclosed inthe invention, an electric lifting rod is controlled to work through the open source single chip microcomputer, the telescopic end of the electric lifting rod drives a mounting seat to perform liftingmovement, and the display height of the training table is thus adjusted; a servo motor is controlled to work through the open source single chip microcomputer, the output shaft of the servo motor drives the training table to rotate through a connection seat, and the display angle of the training table is further adjusted; and the flexibility is good, the adjustment is convenient, and teaching work is facilitated.

The invention discloses a friction driving type brake disc flatness detection mechanism. The detection mechanism comprises belt pulley bearers, belt pulleys, a synchronous belt, a surface elastomer of the synchronous belt, a column, a sliding sleeve seat, a fastening screw of the sliding sleeve seat, a laser displacement sensor, a crossbeam, a sensor fastening screw, a measuring pedestal, a cylindrical guide rail, a pedestal of the cylindrical guide rail and the like. When the mechanism starts working, a feeding end pushes an input brake disc to a specific position on the synchronous belt pulleys via the cylindrical guide rail; with rotation of a synchronous belt mechanism, the surface elastomer of the synchronous belt is transmitted to a position under the brake disc; in the position, the elastomer is extruded between the belt pulley and the brake disc, and friction is generated between the elastomer and the brake disc; the belt rotates continuously, and the brake disc generates servo-slide on the cylindrical guide rail via the friction; and when the brake disk moves to a measurement position, the laser displacement sensor completes data collection and dynamic measurement for the flatness of the brake disc.

The invention provides a compression-type compact busduct shell assembly. The compression-type compact busduct shell assembly comprises cover plates and side plates, which are spliced into a II shape, wherein the cover plates are located at the upper side and the lower side; the side plates are located at the left side and the right side; a conductor accommodating cavity for placing conductors is formed in the middle parts of the cover plates at two sides and the side plates; the upper end and the lower end of the conductor accommodating cavity are clamped with hollow rectangular support pipes; first bolt holes which are correspondingly connected from left to right are formed in the contact parts of the support pipes and the side plates; long bolts are screwed into the first screw bolt holes; long nuts are connected with the tail parts of the long bolts; second bolt holes which are correspondingly connected from top to bottom are formed in the contact parts of the cover plates and the side plates; short bolts are screwed into the second screw bolt holes; and square nuts are connected with the tail parts of the short bolts. The compression-type compact busduct shell assembly has the beneficial effects of being simple and convenient to install and safe to use; the conductors can be completely compressed; mechanical vibration of the conductors caused by electrical force is eliminated; odd harmonics in the electrical transmission process are eliminated; the power supply quality is improved; the temperature rise can be effectively reduced; and the service lifetime is prolonged.

The invention discloses an aluminum coil pipe production method. The aluminum coil pipe production method comprises the following steps that melting and casting of an aluminum rod is carried out, andspecifically molten aluminum is injected into a mold cavity for pilot injection molding; hot peeling is carried out, wherein the aluminum rod subjected to pilot injection molding is heated to remove the surface parts with many impurities and poor performance of the aluminum rod; extrusion is carried out, wherein the aluminum rod is placed into an isothermal extrusion mold, and a twisting closing section working belt is added in front of a welding-closing cavity for extrusion; and cold drawing is carried out, and specifically cold-drawing processing is carried out by using a moving core head and a hard alloy mold. A large-processing-amount reducing-diameter wall-reducing mode is adopted by using the production method, so that the extrusion size tolerance and mechanical vibration during connection of the two aluminum rods are eliminated, and then the size and the wall thickness precision of a processed aluminum coil pipe can reach +/-0.03 mm.

The invention provides a towel loom with an automatic fuzzing control device. According to a towel rapier loom, an angle sensor is mounted on a main transmission shaft and is connected with a single chip microcomputer through a wire; the port of the single chip microcomputer is connected in series with a motor driving thick-film module and a switch reluctance motor; the switch reluctance motor is connected with a wefting device of the towel rapier loom through a speed reducer. Due to the arrangement, the towel rapier loom can be automatically controlled during towel fuzzing operation to realize self-locking, so that the fuzzing length of a towel can be uniform and consistent, and the stable operation efficiency of equipment can be correspondingly improved.

The invention discloses a self-suction type X-ray generating device and application thereof. The device comprises an insulating shell, a cathode, an anode, a grid, at least one adsorption metal plateand at least one sputtering metal plate, the cathode is packaged in the insulating shell and is used for releasing electrons; the anode is packaged in the insulating shell, the anode comprises a target body and a target surface, and electrons released by the cathode collide with the target surface to release X-rays; the at least one adsorption metal plate and the at least one sputtering metal plate are arranged in parallel, each adsorption metal plate and the sputtering metal plate adjacent to the adsorption metal plate form one group of ion sputtering structures, there is at least one group of the ion sputtering structures, the at least one group of the ion sputtering structures are located at the at least one side of the cathode, and the plane directions of the at least one adsorption metal plate and the at least one sputtering metal plate are parallel to the electron release direction of the cathode; and the gate may be disposed on the at least one adsorption metal plate or the at least one sputtering metal plate or disposed separately. By introducing the ion sputtering structures, residual gas molecules in the X-ray tube are adsorbed while the X-ray tube emits, and a better vacuum degree is obtained.

The invention discloses an atomic clock frequency discrimination signal detection system. The detection system comprises an atomic clock control circuit system, a first optical system, a physical system, a second optical system and a microwave pulse synthesizer, the first optical system generates linearly polarized light; the physical system generates a frequency discrimination signal according tothe double-microwave pulse signal, and is used for realizing closed-loop locking of atomic clock frequency and rotating the polarization direction of linearly polarized light; the second optical system determines the component of the detection light which rotates after passing through the physical system in the vertical direction by using a photoelastic modulation technology; the atomic clock control circuit system determines an error voltage signal of atomic clock frequency closed-loop locking according to the component of the detection light in the vertical direction by using a cross-correlation detection technology; and the microwave pulse synthesizer generates a 6.8 GHz double-microwave pulse signal according to the error voltage signal. According to the invention, the photoelastic modulation technology and the cross-correlation detection technology are combined to improve the signal-to-noise ratio and the frequency stability of the atomic clock frequency discrimination signal.