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

The invention discloses an atomic clock frequency discrimination signal detection system. The detection system includes: 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 to the double microwave pulse signal, which is used to realize the closed-loop locking of the atomic clock frequency and rotate the polarization direction of the linearly polarized light; the second optical system uses photoelastic modulation technology to determine the probe light that is rotated after passing through the physical system The component in the vertical direction; the atomic clock control circuit system uses the cross-correlation detection technology to determine the error voltage signal of the atomic clock frequency closed-loop locking according to the component of the detection light in the vertical direction; the microwave pulse synthesizer generates a 6.8GHz double microwave pulse signal according to the error voltage signal . The invention combines photoelastic modulation technology and cross-correlation detection technology to improve the signal-to-noise ratio and frequency stability of the atomic clock frequency discrimination signal.

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 an integrated two-speed transmission electric drive assembly system and an application method. The integrated two-speed transmission electric drive assembly system comprises a driving motor, a first brake, a second brake, a double-row planetary gear mechanism and a final reduction drive and differential assembly, wherein the output shaft of the driving motor is connected toa front-row planetary carrier through a spline; a front-row ring gear and a rear-row ring gear are integrated into one; a rear-row sun gear is connected to the front-row planetary carrier; steel plateassemblies of the first brake and the second brake are engaged with a gearbox body; a friction plate assembly of the first brake is engaged with an outer ring gear; the friction plate assembly of thesecond brake is engaged with the extension end of a front-row sun gear; and the output end of a rear-row planetary carrier is connected to the input shaft of the final reduction drive and differential assembly and outputs power to wheels. The integrated two-speed transmission electric drive assembly system decreases the axial dimension of a powertrain and decreases the mechanical noise while reducing the difficulty of the arrangement of a whole vehicle. The integrated two-speed transmission electric drive assembly system is compact in whole structure, small in size and light in weight. The design of two-speed transmission enables a motor to work in an efficient range for a long time so as to improve the power performance and economy of the whole vehicle.

The invention discloses a high vacuum low temperature thermostat using low heat leakage flexible connection structure, including refrigerator fixing flange whose outside is fixed with extine of the top by bolted construction and inside is melted and fixed by bellows, in thermostat, vacuum jacket, upper heat sink, lower heat sink and flexible connection structure are installed under the refrigerator fixing flange. Its advantage include: vacuum jacket has property of low heat leakage by using folding bush and other types; stainless steel bellows in fixed structure can eliminate mechanical vibration caused by low temperature refrigerator operation; mechanical yaw between agent of refrigerator and cooled substance is allowed by flexible connection structure; additional indium slice between agent of refrigerator and heat sink, heat sink and cooled substance can decrease thermal contact resistance between connecting fitting and effective refrigerating capacity loss.

The invention relates to a power system assembly of an electric vehicle. The power system assembly comprises a motor, a gearbox and a differential mechanism, wherein the motor and a transmission are integrally designed, and the transmission comprises a planet wheel mechanism and a duplex gear mechanism. The power system assembly disclosed by the invention effectively reduces the complexities and areas of a motor shell and a transmission shell, and reduces the axial size of the power assembly; the power system assembly is compact in structure, small in size and light in weight, and is consistent with a light weight principle of automobile. According to the power system assembly, a rotor shaft of the motor is directly connected to a central gear of the planet wheel mechanism in the transmission, so as to avoid coaxial tolerance caused by a motor output shaft and a transmission input shaft which are in matched installation, thereby eliminating the subsequent mechanical vibration and relieving the mechanical connection and noise. On the other hand, compared with an existing electric vehicle, the power system assembly which is in two-gear transmission ensures that the motor can work in an efficient area for a long time, thus prolonging the driving range of the vehicle.

The invention discloses a self-absorbing X-ray generating device and its application. The device comprises an insulating case, a cathode, an anode and a grid, at least one adsorption metal plate and at least one sputtering metal plate; the cathode is packaged in the insulating case Inside, used to release electrons; the anode is packaged in the insulating shell, the anode includes the target body and the target surface, and the electrons released by the cathode collide with the target surface to release X-rays; the adsorption metal plate and the sputtering metal plate are arranged in parallel to absorb the metal The plate and its adjacent sputtering metal plates form a set of ion sputtering structures, the number of ion sputtering structures is at least one set, the ion sputtering structures are located on at least one side of the cathode, and the adsorption metal plate and the sputtering metal plate The plane direction is parallel to the direction in which the cathode releases electrons; the grid can be arranged on the adsorption metal plate or the sputtering metal plate or separately. The invention introduces an ion sputtering structure to realize the adsorption of residual gas molecules in the tube while the X-ray tube emits, and obtains a better vacuum degree.

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.