108results about How to "Avoid noise problems" patented technology

Multi-tuner receiver architectures and associated methods are disclosed that provide initial analog coarse tuning of desired channels within a received signal spectrum, such as transponder channels within a set-top box signal spectrum for satellite communications. These multi-tuner satellite receiver architectures provide significant advantages over prior direct down-conversion (DDC) architectures and low intermediate-frequency (IF) architectures, particularly where two tuners are desired on the same integrated circuit. Rather than using a low-IF frequency or directly converting the desired channel frequency to DC, initial coarse tuning provided by analog coarse tuning circuitry allows for a conversion to a frequency range around DC. This coarse tuning circuitry can be implemented, for example, using a large-step local oscillator (LO) that provides a coarse tune analog mixing signal. Once mixed down, the desired channel may then be fine-tuned through digital processing, such as through the use of a wide-band analog-to-digital converter (ADC) or a narrow-band tunable bandpass ADC.

The present invention relates to a method for auto-regulating the fan speed. The method includes detecting the temperature of a thermal source. When the temperature of the thermal source exceeds a target value, the fan speed of the fan is regulated according to a relation between the temperature of the thermal source and the fan speed of the fan. Thereafter, the voltage applied to the fan is micro-adjusted through a feedback control mechanism so that the fan speed of the fan reaches a specified speed in steps.

A chip-component structure includes an interposer on which a multilayer capacitor is mounted. The interposer includes component connecting electrodes, external connection electrodes, side electrodes, and in-hole electrodes. The component connecting electrodes and the external connection electrodes are electrically connected by the side electrodes and the in-hole electrodes. Outer electrodes of the capacitor are joined to the component connecting electrodes.

A dimmer control system has a communication control loop that connects a master unit in series with a plurality of remote units, and it is superimposed in series on the dimmer load line so as to allow two-way communication between the master unit and remote units without affecting the operation of the load. Communications from the master to the remote units are encoded in loop current fluctuations, whereas communications from any remote to the master unit are encoded in loop voltage fluctuations. The master unit has a switched power supply, for use during normal LOAD ON operation, in tandem with a capacitive power supply, for use during LOAD OFF operation of the control units so as to minimize hum. The master unit power supply circuit provides an output rail voltage comprised of a reference voltage for the load superimposed with a control loop voltage for the voltage drop across the series-connected remote units. The master unit has a POWER OFF detection circuit and a non-volatile memory for storing system status information, so that when power is restored, the system can be restored to its former power level. The switch units are formed with a cover frame mounting a switch plate on a hinge axis allowing ON/OFF movement of an opposing side thereof. An array of LED light pipes is mounted in the switch plate aligned with the hinge axis, in order to minimize displacement of the light pipes during actuator movement.

A dimmer control system has a communication control loop that connects a master unit in series with a plurality of remote units, and it is superimposed in series on the dimmer load line so as to allow two-way communication between the master unit and remote units without affecting the operation of the load. Communications from the master to the remote units are encoded in loop current fluctuations, whereas communications from any remote to the master unit are encoded in loop voltage fluctuations. The master unit has a switched power supply, for use during normal LOAD ON operation, in tandem with a capacitive power supply, for use during LOAD OFF operation of the control units so as to minimize hum. The master unit power supply circuit provides an output rail voltage comprised of a reference voltage for the load superimposed with a control loop voltage for the voltage drop across the series-connected remote units. The master unit has a POWER OFF detection circuit and a non-volatile memory for storing system status information, so that when power is restored, the system can be restored to its former power level. The switch units are formed with a cover frame mounting a switch plate on a hinge axis allowing ON/OFF movement of an opposing side thereof. An array of LED light pipes is mounted in the switch plate aligned with the hinge axis, in order to minimize displacement of the light pipes during actuator movement.

A dimmer control system has a communication control loop that connects a master unit in series with a plurality of remote units, and it is superimposed in series on the dimmer load line so as to allow two-way communication between the master unit and remote units without affecting the operation of the load. Communications from the master to the remote units are encoded in loop current fluctuations, whereas communications from any remote to the master unit are encoded in loop voltage fluctuations. The master unit has a switched power supply, for use during normal LOAD ON operation, in tandem with a capacitive power supply, for use during LOAD OFF operation of the control units so as to minimize hum. The master unit power supply circuit provides an output rail voltage comprised of a reference voltage for the load superimposed with a control loop voltage for the voltage drop across the series-connected remote units. The master unit has a POWER OFF detection circuit and a non-volatile memory for storing system status information, so that when power is restored, the system can be restored to its former power level. The switch units are formed with a cover frame mounting a switch plate on a hinge axis allowing ON/OFF movement of an opposing side thereof. An array of LED light pipes is mounted in the switch plate aligned with the hinge axis, in order to minimize displacement of the light pipes during actuator movement.

The invention discloses an anti-occlusion pedestrian detection method based on an attention mechanism, and the method comprises the steps: obtaining the multilayer convolution features of a pedestrianimage, and generating a new feature layer containing semantic information and detail information through the structural fusion of a new feature pyramid; adopting k-means clustering to obtain the sizeof a preset pedestrian bounding box; predicting regression bias and classification confidence of all pedestrian bounding boxes; calculating a cross entropy loss function and an improved adaptive occlusion perception regression loss function to obtain an overall loss function; carrying out iterative optimization and continuous training to obtain a detection model; and sending the to-be-detected picture into the detection model, and removing a frame with a high overlapping degree by adopting a non-maximum suppression method to finally obtain a detection result. The method can improve the detection capability of shielded pedestrians, and has higher detection precision and robustness.

The invention provides a tunable all-optical microwave photon frequency conversion device without an external electric local oscillator. The tunable all-optical microwave photon frequency conversion device mainly comprises a narrow line width semiconductor laser unit, a non-linear optical loop circuit, a photoelectric detector and a low-pass filter; a saturated stimulated brillouin scattering effect is stimulated under the condition of not providing the external electric local oscillator and a circuit is selected to transmit by the non-linear optical loop circuit to generate anti-Stokes light for carrying out frequency conversion on a radio-frequency signal. Noise waves and noise inferences, caused by an optical local oscillator in traditional microwave photon frequency conversion are reduced. Meanwhile, the radio-frequency signal is subjected to high-order modulation by using a double-drive lithium niobate modulator, so that the tunable all-optical microwave photon frequency conversion is realized.

An interior antenna (29, 29) of a vehicle communication apparatus (21) for performing wireless communication with a portable terminal device (22) present inside a cabin (11) is disposed in the cabin. The interior antenna includes left and right leaky coaxial cables that can transmit high-frequency band radio waves into the cabin. The left and right leaky coaxial cables are positioned under the cabin and inside left and right door inner panels (72) in a vehicle width direction, either above left and right side sills (51) or at end portions in the vehicle width direction above a floor panel (57), and extend in a vehicle front-rear direction.

An electronic device includes a chip component and an external terminal. The chip component includes a terminal electrode formed on an end surface of a ceramic element body containing an internal electrode. The external terminal includes a first end electrically connected with the terminal electrode and a second end disposed opposite to the first end and connected with a mounting surface. The external terminal includes a first metal and a second metal different from the first metal. The first metal and the second metal are alternately exposed on a surface of the external terminal.

The invention discloses a novel transmission system of an electric long sliding rail, The sliding rail assembly comprises a left rail assembly and a right rail assembly, the left rail assembly comprises a slidably connected upper left rail and a lower left rail, the right rail assembly comprises a slidably connected upper right rail and a lower right rail, and the system comprises a slidably connected bridge with left and right sides fixed above the upper left rail and the upper right rail, respectively; A rack horizontally fixed in the inner grooves of the left lower rail and the right lowerrail; A driving motor connected to a middle lower surface of the slide rail connecting bridge; A transmission rod with a middle part connected with an output end of the drive motor; The transmission module comprises a housing, a driving gear and an output gear, wherein the output gear comprises an integrally formed meshing gear and a transmission gear. The transmission module is fixed inside the left upper rail and the right upper rail, respectively. The invention avoids the deflection problem of the filament rod in the long-stroke transmission, and effectively avoids the generation of abnormal sound.

To enhance quietness more effectively and perform power transmission more stably. An annular internal gear member (24) is formed from an abnormal noise emission inhibiting material having a lower hardness than a metal. Also, a deformation inhibiting part (22d) comprising an annular flange is provided at the outer peripheral edge of a carrier (22). Thus, when a planetary gear mechanism is operated, an internal gear member (24) partially projects outward from the annular shape and deforms. When doing so, the projecting deformation part of the internal gear member (24) comes into contact with the inner peripheral surface of the deformation inhibiting part (22d). With this configuration, deformation of the internal gear member (24) is effectively inhibited.

The method includes following steps: through programmable gain amplifier, input analog signals are magnified; through A/D converter, amplified analog signal is converted to digital signal outputted; calculating power of digital signal from a certain amount of output data; comparing power of digital signal with power value of target setup in advance; based on result obtained from comparing powers, gain of programmable gain amplifier is adjusted. The invention also discloses device for raising SNR of A/D converter. The device includes PGA, A/D converter, module for calculating output power, power comparison module, and PGA gain control module. The method can reach optimal match between input signal and A/D converter, and raises SNR of A/D converter evidently. The method and device are applicable to circuit of containing A/D converter.

A ceramic electronic device includes multiple chip components and a pair of metal terminal portions. The chip components consist of a pair of chip end surfaces and four chip side surfaces. Terminal electrodes are formed on the pair of chip end surfaces. The pair of metal terminal portions is arranged correspondingly with the pair of chip end surfaces. Each of the pair of metal terminal portions includes an electrode face portion, multiple pairs of engagement arm portions, and a mount portion. The electrode face portion faces the chip end surface. The multiple pairs of engagement arm portions extend from the electrode face portion toward the chip side surface and sandwich and hold the chip components. The mount portion extends from one of terminal second sides toward the chip components and is partially substantially vertical to the electrode face portion.

The invention discloses a base crane and a fan assembly thereof. The fan assembly comprises a center spacer with a motor mounting position. A ventilation opening in butt joint with a volute air port of a centrifugal volute is formed in the center spacer. The fan assembly is characterized in that the fan assembly further comprises at least one air guide plate corresponding to the ventilation opening; the length direction of the air guide plates is parallel to that of the center spacer; an acute included angle is formed by the air guide plates and the center spacer; and an opening of the acute included angle faces a volute tongue of the centrifugal volute. According to the base crane and the fan assembly thereof, after air blown out of the volute air port of the centrifugal volute is blown to the air guide plates, the air is guided by the air guide plates to be blown to an evaporator near the volute tongue of the centrifugal volute, the air is made to flow through the evaporator more evenly, and the overall heat exchange efficiency of the evaporator is increased; and vortex generated by turbulence of an air path flow field is weakened, noise is lowered, and abnormal noise is avoided.

The invention discloses a low multi-layer assembly type wood-bamboo frame-grid wall structure suitable for village and town residences. The system comprises an external wood frame and an internal grid shear wall made of standard wood or raw bamboo, and wood beams and wood columns of the external wood frame are connected through slotted-in steel plates; an internal wood grid component and an external wood frame of the wood frame-wood grid shear wall structure are connected through a joint bar, and the joint bar serving as a middle component is in bolt connection with the wood grid component and is in angle steel connection with the external wood frame; and an internal bamboo grid component and an external wood frame of the wood frame-bamboo grid shear wall structure are hinged through lug plates at the ends of the internal bamboo grid component and the external wood frame, and the slotted-in steel plates penetrate through the wood beams or the wood columns and are fixed with the wood beams or the wood columns through split bolts. The assembly type wood-bamboo frame-grid wall structure system has good anti-seismic performance and high environmental protection benefits, and is convenient to construct and low in manufacturing cost.

The invention discloses a non-woven fabric foaming liner material for an automobile seat cushion and a preparation process of the non-woven fabric foaming liner material. Hydrophilic polyester fibersand respun polyester are mixed, extended, carded, lapped and drafted to prepare cotton webs, and the prepared hydrophilic polyester fiber cotton web is laid on the respun polyester cotton web or in the middle of two layers of respun polyester cotton webs; meanwhile, spunlace reinforcement treatment is carried out, and the non-woven fabric foaming liner material is prepared. The process comprises the following steps that 1) the hydrophilic polyester fibers and polyester fibers are mixed, extended, carded, lapped and drafted to prepare the cotton webs; 2) the cotton web made of the hydrophilic polyester fibers is laid on the cotton web made of the respun polyester or in the middle of two layers of respun polyester cotton webs, a product is sent to a spunlace reinforcing area for spunlace reinforcement to obtain a double-layer non-woven fabric or a three-layer non-woven fabric; and (4), the double-layer non-woven fabric or the three-layer non-woven fabric is wound. The non-woven fabric foaming liner material and the preparation process have the advantages that waste materials and old materials are easy to recycle, large waste is avoided, the recycling rate is high, and environmental pollution is small.