36results about How to "Weak noise" patented technology

A slider is provided with projections. Each projection is formed with tapered surfaces. A casing is provided with concave portions having the same shape as the projections. During the return of an operating body, the slider ascends while being inclined, and the slider stands upright as the tapered surface of the projection and the tapered surface of the concave portion of the casing slide on each other. Then, each projection is fitted into the corresponding concave portion, thereby positioning the slider.

When a copy sheet jams in the process of image formation in an image forming machine with a detachable unit having at least an image carrier device, it is necessary to detach the unit to remove the sheet in the state the image carrier device is charged with electric charge. In such a case, when the unit is detached and again attached, spark discharging may occur inducing noise upon a contact of an electrically conductive shaft of the image carrier device to the ground conductor provided in an image forming machine body and malfunction is induced in an initializing program. The image forming machine of the present invention prevents the occurrence of such a problem. Guide grooves are provided to base frames of the image forming machine to guide both end parts of the electrically conductive shaft of the image carrier device to position the unit in place, and a charge eliminating member is provided upstream from the position for allowing the electric charge accumulated on the image carrier device to be corona-discharged by way of the conductive shaft thereof to remove the charge accumulated thereon.

To provide a noise suppressing device which accurately suppresses weak electric field strength pulse noise.A band-limiting unit (5) band-limits a composite signal obtained by demodulating an FM baseband signal, to a frequency band equal to or lower than a predetermined frequency so as to output a monaural audio signal. A pulse detecting unit (62) which detects pulse noise in the audio signal outputted by the band-limiting unit (5). A pulse judging unit (63) judges that a detection result of the pulse detecting unit (62) is valid in the case where pulse noise is detected in the composite signal, at a position corresponding to the detected pulse noise. A pulse suppressing unit (64) suppresses the pulse noise detected in the audio signal, in the case where the pulse judging unit (63) judges that the detection result is valid. Specifically, the amplitude of the composite signal which is synchronized with the audio signal is compared with a threshold, and it is judged that the detection result is pulse noise in the case where the amplitude of the composite signal exceeds the threshold.

The invention provides an energy-saving concrete vibrating tamper which comprises a vibrating bar. The vibrating bar comprises a shell and an internal structure. The internal structure comprises a spiral tube extending along the axis of the vibrating bar. The head portions of two screw tubes in the spiral tube are connected through a smooth guide tube, and the tails of the two screw tubes are also connected through a smooth guide tube, so that a smooth circulation channel is formed inside the spiral tube, wherein the two screw tubes are twisted in parallel, and a steel ball is arranged in the smooth circulation channel. The two ends of the spiral tube are each provided with an electromagnet. The electromagnets are coupled to a control module in the shell. The control module is connected with an external power source through a cable. The spiral tube, the electromagnets and the control module are fixedly connected with the shell. The two ends of the spiral tube are provided with position sensors coupled to the control module. When one position sensor senses that the steel ball reaches the end, where the position sensor is located, of the spiral tube, the control module switches off the corresponding electromagnet at the end of the spiral tube, and the electromagnet at the other end of the spiral tube is switched on. The energy-saving concrete vibrating tamper is low in cost, small in energy consumption and low in noise, and has a good vibrating effect.

When a sheet jams in an image forming machine with a detachable unit having at least an image carrier device, it is necessary to detach the unit to remove the sheet when the image carrier device is charged with electric charge. When the unit is detached and re-attached, spark discharging may occur inducing noise upon a contact of an electrically conductive shaft of the image carrier device to a ground conductor. The present invention prevents the occurrence of such a problem. Guide grooves are provided to a base frames of the image forming machine to guide both end parts of the electrically conductive shaft of the image carrier device to position the unit in place, and a charge eliminating member is provided upstream from the position for allowing the electric charge accumulated on the image carrier device to be corona-discharged by way of the electrically conductive shaft to remove the accumulated charge.

The invention provides an electromagnetic energy-saving concrete vibrator which comprises a vibration bar. The vibration bar comprises a shell and an internal structure, the internal structure comprises an electromagnetic bar extending along the axis of the vibration bar, the electromagnetic bar is formed by connecting two or more segments of electromagnets in series, the segments of electromagnets are isolated through non-magnetism substance and are fixed, and the electromagnets are coupled with the same control module; one end of the electromagnetic bar is an end A, the other end of the electromagnetic bar is an end B, and the electromagnets are powered on circularly and alternately in a reciprocating mode through the control module from the end A to the end B of the electromagnetic bar first, then from the end B to the end A and finally from the end A to the end B; the control module is electrically connected with an external cable, the electromagnetic bar is surrounded by a spiral tube composed of non-iron magnetic substance, the two ends of the spiral tube are closed, a steel ball is arranged in the spiral tube, and the spiral tube and the electromagnetic bar are fixed to the shell. The vibrator is low in cost, small in energy consumption, low in noise and good in vibrating effect.

The invention relates to a visible light image and infrared image fusion processing system and a fusion method. The fusion processing system comprises an image acquisition module, an image fusion module and an image display module, wherein the image fusion module is connected with the image acquisition module and the image display module. By adoption of the fusion method, the fusion ratio of a visible light image to an infrared image can be adjusted according to requirements, and detailed images are filtered and compared and then enhanced, so that detail information of a fused image is improved, and noise interference is avoided. Furthermore, fusion weights of the visible light image and the infrared image and the detail enhancement degree can be flexibly controlled through external parameter adjustment, and thus various display requirements are met.

A permanent magnet rotor including a rotor core and permanent magnets. The rotor core includes a plurality of magnetic induction blocks. A plurality of radial recesses are formed between every two adjacent magnetic induction blocks for mounting the permanent magnets. The magnetic induction blocks protrude at both sides of the opening of the radial recesses to form hook blocks. The permanent magnets include a first permanent magnet and a second permanent magnet. The first permanent magnet includes a north pole strong magnetic surface and a south pole weak magnetic surface. The second permanent magnet includes a north pole weak magnetic surface and a south pole strong magnetic surface. The first permanent magnet and the second permanent magnet are alternately disposed in the radial recesses.

The invention provides a grouting material for foundation reinforcement. Slurry is prepared by selecting Portland cement a main material and adding admixtures of sulfate aluminium cement, slag micropowder, coal ash, gypsum, lime, sodium silicate, calcium carbonate powder, calcium hydroxide, low-viscosity cellulose and the like; the original loose soil bodies or cracks are cemented and solidified to form a new consolidation body, so that the constituents, the seepage performance, the chemical stability, the mechanical property and the like of the soil body structure are changed, and higher engineer properties are achieved.

The invention discloses an automatic sawing machine, which is used for sawing electrical carbon. The sawing machine comprises a rack, wherein a blanking passage I and a blanking passage I are formed in two adjacent lateral surfaces of the rack respectively; a guide plate is connected to the top of the blanking passage II; a baffle plate enclosing a rectangle is arranged at the top of the rack; a connector is formed in one side of the baffle plate; a machining tabletop is arranged on the rack in the baffle plate; a die clamping mechanism, a sawing mechanism, a positioning mechanism I and a positioning mechanism II are arranged on the machining tabletop. The automatic sawing machine has the advantages of compact and scientific structure, small size, automatic operation, convenience, accuracy, low defective rate, less quality and degraded product classification failures, capability of greatly improving the working efficiency of electrical carbon sawing operation and meeting the requirements of green production, convenience in maintenance, weak noise, energy saving, environment friendliness and less harm to an operator.

The invention discloses a fan blade which comprises a hub (110), a fan leaf (120) installed on the hub (110) and a diversion part (130) installed on the hub (110), wherein the diversion part (130) is arranged in the rotational center region of the hub (110); the outer surface of the diversion part (130) is provided with a barrier surface (131); and the barrier surface (131) blocks in a track of gas flowing toward the rotational center region of the hub (110). According to the fan blade, when the fan blade rotates, the rotational center region of the hub has a tendency of forming a negative pressure region; with arrangement of the diversion part, when flowing toward the rotational center region, the gas can be blocked by the barrier surface, so that the quantity of the gas which enters the rotational center region of the hub is lowered to some extent, collision of the gas and an ambient high-speed gas flow after the gas enters the rotational center region of the hub is relieved, and therefore, the produced noise is weaker when the fan blade runs. The invention also discloses an air conditioner.

The invention aims to provide an internal-rotation vertical type bionic drag-reducing testing experiment platform which comprises a pool, a torque signal coupler, a device base, a device frame, and a rotary drum, wherein a liquid is filled in the pool, the device frame is arranged in the pool and is of a non-closed structure, the device base is fixed on the device frame, a water distributing sealing cavity and a device cavity are fixed on the device frame, the water distributing sealing cavity is located in the device cavity, a frequency modulation motor is fixed on the device cavity, the torque signal coupler is installed on the inner wall of the device cavity through a signal coupler base, the frequency modulation motor is connected with the torque signal coupler through an elastic pin coupler, a water distributing hollow shaft is arranged in the water distributing sealing cavity, the upper end of the water distributing hollow shaft is connected with the torque signal coupler through a plum blossom coupler, the lower end of the water distributing hollow shaft is connected with the rotary cylinder, the rotary cylinder is arranged in the device frame, a water pump is communicated with the pool through a first water pipe, and the water pump is communicated with the water distributing sealing cavity through a second water pipe. The internal-rotation vertical type bionic drag-reducing testing experiment platform is small in volume, simple in structure and convenient to operate.