37results about How to "Avoid disturbing noise" patented technology

The invention relates to a brake and to a method for controlling the brake. The brake comprises a base part, a braking piece movably supported on the base part, which braking piece is configured to be moved between a braking position and a releasing position, a spring, with the spring force of which the braking piece can be dropped into a braking position, a support member for limiting the initial position of the drop-out movement of the braking piece and also a controllable actuator, which is mechanically connected to the aforementioned support member and configured to displace the initial position of the drop-out movement of the braking piece with respect to the braking position.

An MR effect element that can obtain the sufficient back flux-guide effect under the condition of reducing the capacitance between the upper and lower electrode layers is provided. The element comprises: an MR effect multilayer provided on the lower electrode layer; an insulating layer surrounding a rear side surface and side surfaces opposed to each other in track width direction of the MR effect multilayer; and an upper electrode layer provided on the MR effect multilayer and the insulating layer, the insulating layer having a concave portion filled with a portion of the upper electrode layer, the concave portion positioned near the rear side surface of the MR effect multilayer, and a bottom point of a concave of the concave portion positioned at the same level or a lower level in stacking direction compared to an upper surface of the free layer.

The invention discloses a fault identification method, device and system for a conveyor. the conveyor comprises a conveying belt and a carrier roller for supporting the conveying belt. The fault identification method comprises the following steps: collecting an acoustical signal of the surrounding of the conveyor; extracting a periodic audio signal from the acoustical signal of the surrounding; according to the periodic audio signal, identifying audio features in a preset frequency; and according to the audio features, identifying the fault of the carrier roller. The method can quickly identify the fault of the carrier roller of the conveyor through the audio features in the preset frequency, can avoid other interfering noises, and meanwhile can replace workers to automatically detect thedeflection fault of the conveying belt and the fault of surface temperature anomaly of the conveying belt of the conveyor.

The invention relates to a polarity reversal driving method of a liquid crystal display device and a source driver. During a same frame of display period, a polarity sequence of pixel groups of a plurality of gate lines is reversed, so that the positions of the pixel groups after polarity sequence reversing are distributed in the whole frame uniformly in a space domain. The positions of the pixelgroups after polarity sequence reversing are change at a one-frame interval, so that balanced distribution of the positions of the pixel groups is realized in a time domain.

The wiper blade has a fastening part, a wiper lip and an elastically connected center part. The center part has a hollow space, which is bounded by two flexible walls. A stopper element is provided toextend in the hollow space based from the fastening part, and bounds the deformation of the center part, when the wiper blade is loaded with a deformed force. The stopper element has three-cornered cross-section, whose base surface represents in direction of the fastening part.

A belt retractor for a vehicle safety belt with a frame has a belt reel (10) rotatably mounted in the frame, a coupling disk (14) rotatably mounted relative to the belt reel (10), and a clip spring (16) which is attached to the belt reel (10) and to the coupling disk (14).

The invention discloses a micro-nanofiber sensor used for detecting dissolved hydrogen in transformer oil. The micro-nanofiber sensor comprises a laser transmitter, a micro-nanofiber, a photoelectric detector and a control module, wherein the micro-nanofiber is placed in to-be-detected transformer oil; the surface of the micro-nanofiber is coated with a hydrogen-sensitive film; the output terminal of the laser transmitter is connected with the input terminal of the micro-nanofiber via a connection fiber; the control terminal of the laser transmitter and the output terminal of the photoelectric detector are electrically connected with the control module separately; and the control module controls the transmission parameters of the laser transmitter and calculates the concentration of hydrogen according to a power signal output by the photoelectric detector. The micro-nanofiber sensor provided by the invention overcomes the shortcomings of conventional optical-fiber hydrogen sensors and improves the vibration resistance and response speed of the optical-fiber hydrogen sensors.

The invention relates to a theft protection alarm start device, which comprises a sensitive switch provided with a main body, a linkage component and an arm. The linkage component can be positioned in the main body relatively in pivot swing mode; the arm is positioned in the linkage component in the mode of single direction pivot rotation; a transmitter is connected electrically to the sensitive switch; a wafer, which has a toggle section and can move along a first direction and a second direction; when the wafer moves along the first direction, the toggle section toggles the arm, the arm pushes the linkage component and the sensitive switch will start the transmitter; when the wafer moves along the second direction, the toggle section toggles the arm and the arm rotates along a single direction. Therefore, the invention can be installed on different doors to provide excellent practicality.

A percussion power tool includes a motor (6) located in the tool-housing (4) for driving the output member (12) and the percussion mechanism (10), a chuck (20) for receiving a working tool (22), a locking mechanism (24) for securing the chuck (20) on the output member (12) and including at least one locking member (26) which provides in a locking position thereof, for a formlocking connection between a connection member (30) of the chuck (20) and the output member (12), an adjusting sleeve (34) that prevents, in its blocking position, a radial displacement of the at least one locking member (26) from the locking position and a damping member (56) provided between the output member (12) and the connection member (30) and acting in the axial direction.

The invention relates to a method to manufacture electric power steering systems (10). First, an electric motor (20) having a drive shaft (24), a coupling device (26), and a worm gear (12) having a worm shaft (16) are provided. Then, an adjusting sleeve is provided, and an individual axial position of each adjusting sleeve in its associated opening is determined in order to achieve a specific axial preloading force on the worm shaft. The adjusting sleeve (34) is press-fitted into the axial opening (32) in the determined axial position, and a spring element (44) is installed in the adjusting sleeve (34) so that the spring element is supported on one end axially on the drive shaft and on its other end it is supported axially on the adjusting sleeve (34), and said spring element acts upon theworm shaft with the preloading force in the axial direction via the adjusting sleeve. In addition, also described is an electric power steering system.

A linear guide apparatus may include a guide rail, a carriage block, at least two recirculating tubes, and two end covers. The carriage block has an axial sliding channel formed at a middle portion of a bottom surface thereof, and the carriage block is slidably coupled on the guide rail through the sliding channel. Each of two sides of the sliding channel has at least a sliding groove formed between the carriage block and guide rail. Each sliding groove comprises a plurality of rolling balls installed therein so as to enable the carriage block to slide forward and backward on the guide rail. Each of the sliding grooves is cooperated with a recirculating channel axially penetrating through the carriage block. Each of the recirculating tubes comprises a plurality of spiral threads to enable the rolling balls to have lateral roll at a specific angle when passing therethrough.

The invention is suitable for the field of multi-base-station anti-jamming of a cordless telephone system and discloses a multi-base-station anti-jamming method based on a cordless telephone system. By presetting a frequency hopping sequence table in which one frequency hopping is spaced by at least two frequency points, a switch transmits frequency hopping sequence resetting messages at the intervals of at least 80 MS to each base station, so that the frequency hopping of each base station is spaced by at least four frequency points. Compared with the prior art, the multi-base-station anti-jamming method based on the cordless telephone system has the advantages that: jamming noises generated by the collision jamming of frequency points between adjacent base stations during conversation of spaced extension telephones of the base station can be avoided, and the conservation quality of the extension telephones is enhanced.