52results about How to "Noise is caused" patented technology

A pulse-width modulation (PWM) amplifier is adapted to a class-D amplifier in which an analog input signal is subjected to integration, pulse-width modulation, and switched amplification, wherein a glitch elimination circuit eliminates noise from a pulse-width modulated signal, from which a high pulse signal and a low pulse signal are isolated such that each pulse is delayed by a dead time at the leading-edge timing thereof. When both of them are simultaneously set to a high level, one of them is reduced in level. In response to the occurrence of clipping, an integration constant applied to an operational amplifier is automatically changed from a primary integration constant to a secondary integration constant. When the clipped state is sustained for a prescribed time, an inversion pulse is compulsorily introduced into the pulse-width modulated signal.

A first Gray code technique and a second raster calibration technique can be combined to create a precise mapping between pixel locations of the camera and pixel locations of the projector(s). In one aspect the technique of using the raster calibration images is eliminated by interpolating the projector coordinate information decoded from the Gray code images. In another aspect camera images are processed to reduce errors caused by noise so that text can be displayed without any noticeable misalignment between projectors. In a third aspect, a scale factor is calculated based on the relative height/width of projector regions in the captured calibration images. Calibration images are recalculated using the scale factor to provide greater correspondence between the mapping of a low resolution camera to the high-resolution projectors.

A straddle carrier having an electric drive system, consisting of a lower and an upper frame, which are connected with one another by means of supports. A lifting mechanism with hoists is disposed on the upper frame, and the lower frame consists of chassis carriers having electrically driven wheels, and a power generation unit that feeds its generated electric power into a direct voltage intermediate circuit, to which current inverters for supplying the travel, lifting, and auxiliary motors are connected. The power generation unit represents a micro gas turbine having an attached power generator, the power of which is passed to the travel, lifting, and auxiliary motors. The straddle carrier can be produced at low weight and maintained under advantageous conditions. Furthermore, the straddle carrier can be operated under environmentally friendly conditions.

A separation wake zone behind a heat transfer tube in a heat transfer device of a heat exchanger or the like is reduced, whereby a heat transfer action of the heat transfer device can be augmented and a pressure loss thereof can be reduced. The heat transfer device of the heat exchanger has a linear or tubular heat transfer object (T) in heat transfer contact with a heat carrier fluid (A), and a heat transfer fin (F) integrally formed with the heat transfer object for heat transmission therebetween. The heat transfer fin is provided with a guide fin (10) positioned in vicinity of the heat transfer object, and the guide fin conducts the fluid to the rear of the heat transfer object, thereby reducing the separation wake zone behind the heat transfer object. A position (B) of separation point of the fluid is set to be at an angular position (β) equal to or greater than 90° from a stagnation point (E) on the heat transfer object by setting of an attack angle, configuration, position and dimensional proportion of the guide fin.

A method for diagnosing a cause of noise of a vehicle is disclosed. The method includes receiving, by a controller, a sound source signal through a microphone installed in the vehicle. The method further includes transmitting, by the controller, the received sound source signal to an artificial intelligence server and extracting, by the artificial intelligence server, reference data corresponding to the sound source signal by comparing the received sound source signal with stored reference data. Additionally, the method includes transmitting, by the artificial intelligence server, the extracted reference data to the controller and outputting, by the controller, to a diagnostic apparatus, an output signal including information about the cause of noise of the vehicle based on the received reference data.

An inspection system is provided that can calculate highly accurate data for inspection having a high S/N ratio with high freedom. In order to attain this, an imaging timing is adjusted to synchronize a time for a projected image of an object to move by “m” pixels (“m” is an integer number greater than or equal to 1) in the X-axis direction on imaging elements, with an imaging time interval, and partial image data imaged at the identical inspection position on the object is specified from each unit of two-dimensional image data based on the object appearing deviated by “m” pixels in the X-axis direction in each unit of the two-dimensional image data imaged at each of the imaging timings, and data for inspection in which a noise reducing processing is conducted at the inspection position is produced based on each section of the partial image data.

To provide a device for maintaining body temperature having heart rate and respiratory rate detection function for small animals and a heart rate and respiratory rate measurement system for small animals, which are capable of being simply and easily set up without causing the small animals pain.

A sheet pressure-sensitive sensor (piezoelectric device or the like) (4) is provided over a flat-plate heater (1) to which a heater-current supplying line (2) is connected. The pressure-sensitive sensor (4) is sandwiched between thin insulation sheets (3). A spacer (6) formed of a metallic plate having a hole into which the pressure-sensitive sensor fits is provided between the thin insulation sheet (3, 3). A signal line (5) of the pressure-sensitive sensor (4) is connected to a control device and the heater-current supplying line (2) is connected to a power supply that is capable of being controlled by the control device. With this structure, it is possible not only to maintain the body temperature of a small animal but also to detect the heart rate and respiratory rate of the small animal placed on the pressure-sensitive sensor (4) with the pressure-sensitive sensor (4) and supply the detected values to the control device for measuring and monitoring the heart rate and respiratory rate of the small animal.

A multiple output switching power source apparatus includes first and second switching elements Q1 and Q2, a first series resonant circuit connected in parallel with Q1 or Q2 and having a first current resonant capacitor and a primary winding of a transformer that are connected in series, a first rectifying-smoothing circuit to rectify and smooth a voltage generated by a secondary winding of the transformer, a second series resonant circuit connected in parallel with the secondary winding and having a second current resonant capacitor and a second resonant reactor that are connected in series, a second rectifying-smoothing circuit to rectify and smooth a voltage of the second series resonant circuit, and a control circuit to determine an ON period of Q1 according to a voltage obtained from one of the first and second rectifying-smoothing circuits, determine an ON period of Q2 according to a voltage obtained from the other of the first and second rectifying-smoothing circuits, and alternately turn on/off Q1 and Q2.

A Delta-Sigma modulator that allows for a reduction in the oversampling ratio (OSR) of a radio frequency (RF) Analog to Digital Converter. The modulator comprises a 1-bit quantizer, a N-bit quantizer and a digital quantization error correction circuit that corrects a for quantization error by using digital output signals from the 1-bit quantizer and from the N-bit quantizer, and reduces the quantization noise when the modulator transforms an analog input signal into the digital output signal. The quantization noise is reduced by ditigally correcting quantization errors, which affect the signal-to-noise ration (SNR) characteristic, using digital output signals of the multi-bit quantizer and the 1-bit quantizer. Also, a DC offset which may be generated by the multi-bit quantizer can be digitally removed.

Embodiments disclosed herein relate to a touch display panel and a touch display device. By arranging a shielding structure, which is connected to a touch electrode in a region where a touch line and a data line overlap each other or is applied with a shielding signal corresponding to a touch driving signal from an outside circuit, between the touch line and the data line, it is possible to prevent direct capacitance from being formed between the touch line and the data line, and to prevent the capacitance formed due to the data line from causing noise on a touch sensing signal. In addition, by arranging a touch load reduction layer between the shielding structure and the touch line, it is also possible to reduce the capacitance between the touch line and the data line arranged in the horizontal direction, thereby improving touch sensing performance.

An air delivery unit includes a casing, an air delivery device arranged in a fan passage in the casing, and a fan guard that is arranged at an air outlet of the casing and has an air blowing surface having a grill structure and a hollow frame wall portion. An air blowing opening is formed in the frame wall portion of the fan guard. This structure allows the air to be blown also from the opening of the frame wall portion of the fan guard. This reduces the amount and the speed of the air blown from the air blowing surface of the fan guard having the grill structure. As a result, rise of static pressure of the air delivery device is suppressed and noise caused by interference between bars of an air blowing grill and the air is reduced.

A method in a pneumatic material conveying system, such as a waste conveying system, which conveying system comprises at least one feed point (61) of material, particularly of waste material, a material conveying pipe (100) which is connectable to the feed point (61), a separator device (20) in which the material being conveyed is separated from conveying air, and means (3, 4) for providing a pressure difference in the conveying pipe (100) at least during the conveyance of the material. At least a part of the conveying piping (100) is connectable as a section of a circuit in which conveying air is circulated at least during the conveyance of the material with at least one first pump device, such as a vacuum unit (3), and with at least one second pump device, such as a blower unit (4).

Even when a pitch cycle has a large fluctuation and the pitch cycle string changes abruptly, it possible to suppress the affect of the pitch cycle fluctuation and generate high-quality synthesized speech. A speech synthesis device generates a synthesized speech corresponding to an input text sentence according to an original speech waveform stored in original speech waveform information storage unit (25). The speech synthesis device includes pitch cycle correction unit (40) which extracts a fluctuation component of the pitch cycle of the original speech waveform which is obtained from original speech waveform information storage unit (25) in order to generate the synthesized speech and which corrects, based on the extracted fluctuation component, the pitch cycle of the synthesized speech obtained by analyzing the input text sentence. Pitch cycle correction unit (40) connects the pitch cycle waveform of the original speech waveform at the pitch cycle of the corrected synthesized speech.