42 results about "Car noise" patented technology

The invention discloses an automobile noise detection device, and the device comprises a noise collection module, a signal conversion module and a control module. The input end of the signal conversion module is connected with the output end of the noise collection module, and the output end of the signal conversion module is connected with the input end of the control module. The device also comprises a fixed support which can be installed between front seats of an automobile. The fixed support is used for fixing the noise collection module, and the noise collection module comprises a plurality of microphones which are used for collecting noises of the automobile in all directions. The device can effectively detect the noise of the automobile in each direction, and enables a user to judge whether each part of the automobile has a fault or not more easily. In addition, the invention also discloses an automobile noise detection system.

The invention provides an elevator and a car noise reduction method; the method can simply limit sound standing waves in the car with low cost so as to effectively and stably reduce car noises; the invention also provides a structure realizing the method; an car (20) inner look up ceiling, formed by a ground panel, a ceiling panel, a front panel, a back panel and left and right panels, is viewed to be an approximately rectangular shape; four peaks of the rectangular are provided with openings (32a); the inner side, viewed from the inner side of the car, of the opening is provided with a cavity (32); the inner side of the cavity outputs control purpose second stage sound waves, so the radiation in the car can be controlled by the second state sound wave from opening (32a) on the four peaks of the ceiling.

A sound insulation block on the inner side of the upper part of the A-pillar of a car, including a heat-resistant plate-shaped frame and a foaming body that can expand after being heated after being connected to the frame. A hole is provided in the middle and communicates with the above-mentioned opening, and at least one fixing piece connected and fixed to the corresponding parts inside the upper part of the A-pillar is provided on the periphery of the plate-shaped frame; the foam body is embedded around the plate-shaped frame , fill the opening and insert it inside the channel to form an inner hole for the circulation of pickling, neutralization, phosphating and purification liquids. The sound insulation block of the present invention is preset in the inner side of the upper part of the A-pillar of the car, and after being foamed and expanded, it can be tightly bonded to the body panel at the place, effectively blocking and blocking the cavity passage at the place, and further improving And improve the purpose of vibration isolation, sound insulation, vibration reduction and noise reduction in the car cockpit. The inner sound insulation block at the upper part of the A-pillar of the car of the present invention is applied to the M2 model of China Junjie.

The invention relates to fiber block loosening equipment, in particular to an anti-blocking loosening machine of automobile sound isolation cotton. The anti-blocking loosening machine comprises a front loosening mechanism, a fiber conveying mechanism and a back loosening mechanism, wherein the fiber conveying mechanism is connected with the front loosening mechanism and the back loosening mechanism; the fiber block loosening equipment also comprises a fiber conduction mechanism; the fiber conduction mechanism comprises a plurality of conduction balls, a ball storage element, a lifting machine and a recovery element; the conduction balls are stored in the ball storage element; each conduction ball is provided with a ferromagnetic ball core; the ball storage element is positioned above the fiber conveying mechanism; the ball storage element comprises a front ball discharging pipe, a back ball discharging pipe and a ball feeding pipe; the recovery element comprises a front recovery magnetic plate, a front recovery pipe and a back recovery pipe. The invention aims at solving the problem that the conveying device can be easily blocked by fiber, and aims at providing the anti-blocking loosening machine of the automobile sound isolation cotton with the advantage that a transportation pipeline can be automatically dredged.

The invention discloses a plasma-based automobile noise reduction method and system, comprising a speed measurement circuit, an analysis control unit, a plasma generator and a noise detector; the speed measurement circuit is connected with the analysis control unit, and the analysis control unit is respectively connected with the plasma generator And noise detector, speed measuring circuit, analysis control unit and noise detector are all set inside the car, plasma generator and noise detector are respectively set at the head and tail of the car, which solves the problem of excessive car noise.

A method for using parts and parts processing molds and accessories for washing and sweeping vehicles belongs to the technical field of mechanical engineering. A noise reduction suction port is composed of a suction port base, a suction port cover plate and a spoiler; The mold, the upper mold core, the lower mold core and the guide rod are connected; the suction cover processing mold is composed of an upper mold and a lower mold; the noise reduction suction port adopts a combined design, which is easy to disassemble and install. It is processed by casting molding, the processing method is scientific and reasonable, the manufacturing speed is fast, and large-scale processing can be realized in the same process. When the invention works, the suction cover has 4 spoilers with different angles to divide the inhaled airflow and pass it through. The sound waves coming in from different angles will cancel each other out, dissipate part of the sound waves through the crests or troughs of the spiral groove, and conduct through the spiral groove, so as to achieve the purpose of noise reduction, which can effectively reduce the noise of the air flow of the cleaning vehicle fan.

The invention discloses a connecting device for an automobile exhaust pipe. The invention is provided with a three-stage shock-absorbing structure, which can effectively reduce the vibration of the automobile exhaust pipe, avoid equipment damage and exhaust pipe falling off, and is provided with a first connecting head And the second connector enables the present invention to be quickly assembled and disassembled with the exhaust pipe, reducing the loading and unloading burden of the staff, and improving efficiency. The first connector safety device and the second connector safety device are provided to improve the fixing strength of the equipment. The unique muffler chamber can weaken the sound of the gas, thereby reducing the noise of the car. The exhaust gas purifier can effectively purify the exhaust gas of the car to avoid the discharge of toxic and harmful gases. It is equipped with a filter to absorb carbon dioxide and reduce carbon dioxide emissions. The greenhouse effect is avoided, and the invention has strong earthquake resistance. Convenient loading and unloading, firm installation, high degree of exhaust gas purification, effective noise reduction and other beneficial effects.

The invention provides a sound-insulating, damping, and noise-reducing thermoplastic sheet for cars. It adopts a high-speed mixer to mix the raw materials of the modified functional pellets, and then prepares the modified functional pellets through a twin-screw extrusion pelletizing unit. The functional pellets are then passed through the sheet or plate extrusion production line to be made into a sound-insulating, damping and noise-reducing thermoplastic sheet for cars with medium and high filling. Modified functional granular material distribution ratio (mass percentage): polyethylene resin 27.6-70.4%, inorganic filler 28-68%, coupling agent 0.4-1.5%, lubricant 0.4-0.8%, antioxidant 0.1-0.7% , 0.3-0.8% diluting dispersant, 0.4-1.0% halogen absorbent; raw materials of modified functional pellets are added to a high-speed mixer and heated to 70°C, then cooled to room temperature. Twin-screw extrusion granulator cylinder control temperature 100-170 ℃, head control temperature 140-200 ℃. The extruder main engine of the plate extrusion production line controls the temperature at 90-170°C, and the head controls the temperature at 120-200°C.