109results about How to "Eliminate phenomenon" patented technology

A photographic stop with two apertures is disposed at a position substantially conjugate to the anterior ocular segment of the eye being examined and at a position on the object-side focal surface of an image-forming lens. An eye fundus image is guided via a lattice barrier disposed on the image-side focal surface of the image-forming lens to an imaging CCD. The photographic stop, image-forming lens, lattice barrier and CCD are moved as a unit for focus adjustment. With such a configuration, the photographic stop is always positioned upon the object-side focal surface of the image-forming lens with the optical system kept telecentric even when the focus is adjusted to compensate for differences in diopter of the eye. This eliminates the phenomenon of a stereoscopic view that becomes more concave or convex the nearer to the periphery of the screen and provides good images of the fundus for stereoscopic viewing without any crosstalk of the left and right fundus images upon the image pickup surface.

A bolometer including: at least one electromechanical microsystem or nanosystem, the microsystem or nanosystem including a support and a mobile mass hung from beams above the support, the mobile mass forming an absorber of optical flux; actuation electrodes configured to set the mobile mass in vibration and arranged laterally relative to the mobile mass; and detection electrodes to detect variation in vibration frequency of the mobile mass arranged laterally relative to the mobile mass.

The present invention relates to an ear microphone for providing clear sound by preventing echo and howling phenomena by blocking external noise, and for providing an effective telephone call in a noisy environment by improving the recognition ability of a voice-recognizing device. For the ear microphone, a connector for connection to an external device, a control unit for controlling the ear microphone overall, and an earphone unit to be worn by a user for outputting or inputting voice are electrically connected to each other through cables. The earphone unit consists of a first earphone unit which includes first and second speakers wearable on the ear, a first microphone having directivity, and a second earphone unit which includes a third speaker. For the control unit, a grounding terminal and one terminal of the control unit are connected to the connector such that the other terminal is connected to the first to third speakers, and one terminal is connected to the connector such that the other terminal is connected to the first microphone. The microphone output terminal is configured to be connected to a resistor in series. The third speaker is configured as a voltage-dividing resistor on a speaker input terminal. Each voltage dividing resistor is differently designed for the first and second speakers such that the second speaker has phase characteristics that are opposite those of the first speaker, and at the same time has a voltage different from the first speaker. A negative terminal of the first speaker and a positive terminal of the second speaker connected to the speaker output terminal are connected to a volume-adjusting unit.

A multi-stage LED driving circuit capable of eliminating current undershoot, including: an LED module having a plurality of stage output terminals; a plurality of switch units coupled with the stage output terminals to receive a plurality of branch currents and provide a plurality of current sensing signals; a current regulation circuit, having a control end coupled with a variable reference voltage, and a current path for receiving the branch currents; and a control unit, receiving the current sensing signals and a voltage signal at an input terminal of the current path, and controlling the switch units; wherein, the control unit uses every two adjacent signals of the current sensing signals to get a ratio in turn to determine whether to switch off a corresponding switch unit of the switch units after a deferred time, and uses the voltage signal to determine whether to change the deferred time.

A unidirectional or bidirectional sand dispensing device, including a discharge port (10), the discharge port includes a lower plate (11) and an upper plate (12), the upper plate is provided above the lower plate, an included angle between a horizontal plane and a straight line where an endpoint of a free end of the upper plate and an endpoint of a free end of the lower plate are located is a leakage angle (13), that is to say, a particulate material forms an inclined plane between the upper plate and the lower plate, and an included angle between the inclined plane and the horizontal plane is the leakage angle, which can be adjusted by changing relative positions of the upper plate and the lower plate. The direction of an opening of the sand passing passage is opposite to a moving direction during the sand dispensing operation. When the sand dispensing operation is stopped, the leakage angle is less than or equal to the static repose angle of the particulate material, and is greater than or equal to zero, which ensures that the particulate material will not slide down, and the phenomenon of sand leakage is eliminated. When the sand dispensing operation is being carried out, the leakage angle is greater than or equal to the dynamic repose angle of the particulate material, which ensures that the particulate material will slide down along the inclined plane and that the sand is dispensed relatively uniformly.

The invention discloses a load-sensitive control system, a control method and a hydraulic system, and relates to the field of engineering machinery. The load-sensitive control system, the control method and the hydraulic system are used for achieving self-adaptive matching of system pressure and load pressure. The load-sensitive control system comprises a variable pump, a load-feedback oil circuit and a differential pressure control valve; the differential pressure control valve is connected with the variable pump and the load-feedback oil circuit, and the differential pressure control valve can enable a difference value between pressure of an outlet of the variable pump and pressure of a load on the load-feedback oil circuit to be changeable. According to the technical scheme, the load-sensitive system with the differential pressure changeable is provided, the system can eliminate the flow saturation phenomenon occurring in the idle-speed operation process of an engine and improve the speed regulating characteristic of the load-sensitive system, and meanwhile the energy-saving property of the system is improved.

The invention discloses a centrifugal compressor. The centrifugal compressor comprises: a housing (10), provided with a mounting chamber (11), a thread section (12) being provided on a side wall of the mounting chamber (11); an adjusting piece (20), mounted in the mounting chamber (11), the adjusting piece (20) being provided with threads adapting to the thread section (12); a driving piece (30), mounted in the mounting chamber (11) and configured to drive the adjusting piece (20) to move forwards or backwards along the thread section (12); and an adjustable diffuser (40), fixedly connected to the adjusting piece (20). The invention also discloses a centrifugal water chilling unit having the centrifugal compressor. The centrifugal compressor and the centrifugal water chilling unit can solve the problem that the adjustable diffuser easily inclines and is stuck, thereby greatly improving the reliability of the centrifugal compressor.

The invention discloses a constrained DelaunayTIN interpolation algorithm-based surface model building method, and relates to the technical field of computer software development, in particular to three-dimensional visualization, geological modeling, numerical calculation and geological disaster assessment. According to a system, input point line data, a data processing unit, a surface model generation unit, a surface model display unit and an output surface model interact in sequence; and the surface model generation unit interacts with the output surface model. The method comprises the steps of (1) processing data for a three-dimensional multi-line segment DXF file; (2) generating a surface model based on a constrained DelaunayTIN interpolation algorithm; and (3) displaying the surface model based on vtkpython. According to the method, the phenomenon that a slender and narrow pathological triangular patch occurs locally is effectively eliminated; the locally generated distortion of evaluation is effectively eliminated; and the surface model is relatively high in accuracy and relatively good in reasonability, and makes up for the deficiency of an existing method for building an earth surface model in a constraint condition.

The present invention relates to a pointless illumination device, comprising: a body; a cover, made of a light spreading material which can uniformly spread out the light of a plurality of light emitting devices; a light source module; a first contact portion; and a second contact portion. The light emitted from the light source module is uniformly spread through the cover so that the phenomenon of pointwise illumination does not exist in the illumination device.

The invention provides a numerical control firecracker binding and firecracker barrel tail blocking machine to overcome the defects that a large number of waste firecracker barrels are produced due to the fact that an existing hand-operated firecracker binding and firecracker barrel tail blocking machine is high in labor intensity and positioning is inaccurate due to manual feeding, and belongs to the technical field of firework and firecracker machinery. According to the scheme, some technical measures are taken, namely, mechanical power replaces manual power, and numerical control automatic feeding replaces manual feeding. According to numerical control automatic feeding, firecracker barrels are fixed, clamped and bound on a longitudinal sliding table, and an electric firecracker barrel tail blocking machine head is arranged on a transverse sliding table. Through a single board computer and the like, the longitudinal sliding table and the transverse sliding table are controlled to move synchronously, therefore, firecracker barrel tail blocking needles can be aligned with each row of firecracker barrels, and numerical control automatic feeding can be achieved. According to the scheme, due to the fact that manual power is replaced by an electromotor, labor intensity of workers is greatly relieved, and meanwhile the working speed is greatly raised. After manual feeding of the firecracker barrel tail blocking machine is replaced by the numerical control automatic feeding, the feeding positioning accuracy of the firecracker barrels is greatly improved, and the phenomenon of appearance of the waste firecracker barrels caused by inaccurate positioning is basically eliminated.

The invention discloses an automatic tracking small-current line selection device and a line selection method. The device is characterized in that a neutral point is arranged in a system with a small-current grounding mode, a controllable impedance part capable of achieving automatic tracking adjustment is arranged between the neutral point and the ground, and a maximum value of the controllable impedance part is set according to the rated voltage of the system; the controllable impedance part is tracked and adjusted according to the system-to-ground voltage or the current of the controllableimpedance part. According to the device and the method, the zero sequence current of a fault line is maximized, the judgment precision of the line selection current is high, the fault line is accurately judged, and line selection is not affected by an arc suppression coil; moreover, the device can be applied to judgement of the fault line when a small-resistance grounding system is grounded with high resistance, and a protection dead zone of the neutral point small-resistance grounding system is removed.

A CWDM filter of the present invention comprises a substrate; a first portion formed on the substrate having at least two first stacking structures; a second portion superposed on the first portion including at least two second stacking structures; and a first matching layer sandwiched between the first and second portions. Each of the first stacking structures of the first portion has a Fabry-Perot cavity and a first coupling layer which are stacked over each other in turn from the substrate. Each second stacking structure has a (HnLH) structure and a second coupling layer, wherein n represents a positive integer greater than 1, L represents a low index layer with a thickness of λ_o/4, H represents a high index layer with a thickness of λ_o/4, and λ_o is the center wavelength of said noise.

An accurate image interpolation method based on direction detection and device thereof are disclosed. The image interpolation method based on direction detection includes the following steps: step a, detecting an interpolating direction of a pixel to be processed to obtain interpolating direction information of the pixel; step b, utilizing the result of detecting an interpolating direction to interpolate the pixel to be processed. Another step a′ between the step a and step b is also included: utilizing the interpolating direction information of the pixel adjacent to the pixel to be processed for correcting the result of step a; at step b, utilizing the detection result of interpolating direction corrected at the step a′ to interpolate the pixel to be processed.

This invention relates to suspend electromagnets for high speed magnetic suspend vehicles and their manufactured method, in which, the magnet includes a core and suspend coils characterizing that the chip of the core and an end plate are opened with key slots at the corresponding places of both side edges and pin keys fixedly connecting the chip and the end plates are set in the key slots with an insulation layer set between them and the suspend coil is composed of an internal insulation bush closely adhered to the core and winded to formation on it and excitation coils winded directly.

An optical modulator includes a waveguide structure forming a two-wave interferometer made of an electro-optical material, and two arms, a set of electrodes connected to a controllable electric source for applying an electric field on at least one of the arms of the interferometer, so as to vary the phase difference between light waves along one or the other of the two arms. The modulator includes two sets of electrodes placed respectively on each of the interferometer arms, one in the non-reversed region of the electro-optical material, the other in the reversed region, and a delay line placed between the control electronics of the electrode sets introducing a delay equal to the light propagation time in the first electrode set.

The invention relates to an on-line detection method for a belt joint, specifically to a calibration method for a self-adaptive threshold in X-ray on-line detection of a joint of a wire-cored belt. The method comprises the following steps: zeroing a joint counter; reading in each image of a video stream one by one on line; sampling the images so as to obtain numbers of wire cores, a maximum number of wire cores, a minimum number of wire cores and an average number of wire cores; substituting the results obtained in the previous step into a variance calculating formula and reading in a next image if the formula is not satisfied, or implementing a next step if the formula is satisfied; going through all the sampling rows and caliberating rows with wire core numbers greater than an optimal threshold as joint rows, otherwise as common rows; and recording the initial position and end position of a joint area so as to obtain the height of the joint area, wherein the joint area is defined as an area with given height and with a joint row count greater than a given threshold, adding 1 to the joint counter, storing the joint area into a memory and reading in a next image. The method provided by the invention overcomes the problem of inaccurate calibration of the joint image due to empirical selection of a threshold in joint row calibration in the prior art.

The invention discloses a swirling flow type double-vertical-pipe drainage system. The drainage system comprises a first vertical pipe and a second vertical pipe which are arranged in parallel, wherein the first vertical pipe is used for draining water, the second vertical pipe is used for exhausting air, the first vertical pipe and the second vertical pipe communicate with each other through a communicating pipe, the air in the first vertical pipe flows into the second vertical pipe through the communicating pipe to be exhausted, the first vertical pipe is an enhanced type inner-spiral water drain pipe, a plurality of spiral ribs are arranged in the first vertical pipe, and the communicating pipe is arranged slantwise upwards from the first vertical pipe to the horizontal direction of the second vertical pipe, so that the water in the first vertical pipe is prevented from overflowing to the second vertical pipe. With the adoption of the swirling flow type double-vertical-pipe drainage system, the nappe phenomenon can be effectively eliminated, the water velocity of the vertical pipes can be retarded, the hydraulic condition of the vertical pipes can be improved, the water flow pressure fluctuation and water flow noise of the vertical pipes can be reduced, and thus the water discharge capacity is greatly enhanced.

A black matrix structure and manufacturing method thereof, an array substrate, a color filter substrate and a display apparatus are provided. The black matrix structure comprises a first black matrix and a plurality of predefined opening regions arranged in an array and surrounded by lines of the first black matrix, wherein, each of the predefined opening regions is provided with an opening therein, and at least one of the predefined opening regions is provided with a second black matrix therein, edges of shading pattern of the second black matrix are adjacent to the opening or in contact with at least one line edge of the first black matrix, and length of a part of each line edge of the first black matrix being in contact with the edge of shading pattern of the second black matrix is less than length of this line edge of the first black matrix.