288results about How to "Accuracy adjustable" patented technology

Manufacturing equipment for a metal powder sintered component includes: a powder layer forming portion that supplies metal powder to form a powder layer; a light beam irradiator that irradiates a give point on the powder layer with light beams to sinter the powder layer and thus form a sintered layer; and a cutter that cuts a shaped object in which sintered layers are integrally stacked. The light beam irradiator has a scan head X shaft that moves a scan head in X direction parallel to a surface irradiated with light beams and a scan head Y shaft that moves the scan head in Y direction, so that the scan head moves in a direction parallel to the irradiated surface to perform irradiation with light beams. Since the scan head moves parallel to the irradiated surface, the irradiated area can be increased. Since the irradiation height can be small, the accuracy of light beam scanning can be enhanced.

The present invention is related to a method and an apparatus for processing a dead pixel, more specifically to a method and an apparatus thereof for detecting and compensating a dead pixel that can maintain a good image quality by reducing image distortion and deterioration. With the present invention, the distortion of an image, caused by erroneously classifying a normal pixel of an inputted image as a dead pixel, is significantly reduced, thereby improving the quality of a processed image. Moreover, based on the characteristics of the inputted image, the algorithm and accuracy of detecting a dead pixel can be adjusted.

A liquid crystal display is provided with: a tap adjustment register for adjusting a gray scale level to a gray scale voltage in intermediate portions close to the end portions of the gamma characteristic; and a partial-voltage-ratio adjustment register for adjusting a ratio of a gray scale voltage among a plurality of gray scale levels in the intermediate portions close to the end portions of the gamma characteristic, in addition to an amplitude adjustment register for adjusting an amplitude of a gamma characteristic which determines a relation between gray scale levels and gray scale voltages or brightness levels on a display panel; a gradient adjustment register for adjusting a gradient of intermediate portions of the gamma characteristic while fixing end portions of the gamma characteristic; and a fine adjustment register for finely adjusting the intermediate portions of the gamma characteristic for each gray scale level.

The present invention is related to a method and an apparatus for processing a dead pixel, more specifically to a method and an apparatus thereof for detecting and compensating a dead pixel that can maintain a good image quality by reducing image distortion and deterioration. With the present invention, the distortion of an image, caused by erroneously classifying a normal pixel of an inputted image as a dead pixel, is significantly reduced, thereby improving the quality of a processed image. Moreover, based on the characteristics of the inputted image, the algorithm and accuracy of detecting a dead pixel can be adjusted.

The invention discloses a network text data detection method based on fuzzy cluster. The method comprises the following steps: firstly preconditioning the extracted network content; extracting features of preconditioned network content which is needed to cluster, clustering, setting initial clustering number, wherein during the clustering process, a clustering number is matched with a membership matrix, each membership matrix contains an average information entropy, the average information entropy selects initial clustering center according to density function, the clustering number is modified in algorithm iteration process, and when the average information entropy is the minimum value, the corresponding clustering number is an optimal clustering number; and finally returning the clustering result to the user. The invention has efficient intelligent clustering effect and can adjust the clustering precision while considering the clustering speed according to different applications.

The invention discloses a crack opening two-direction deformation monitoring structure and a measurement method. An upper vertical fixing rod and a lower vertical fixing rod are provided with vertical level bubbles respectively and are buried into the two sides of a monitored crack respectively. A horizontal cross rod is provided with horizontal level bubbles, is connected with the upper vertical fixing rod through a threaded rod and is fixedly connected with an oblique fixing rod. The two ends of a distance measurement sensor are connected with the oblique fixing rod and the lower vertical fixing rod respectively, and the two ends of an angle measurement sensor are connected with the oblique fixing rod and the distance measurement sensor respectively. The crack opening two-direction deformation monitoring structure and the measurement method have the advantages that oblique crack deformation can be accurately divided into vertical deformation and cross deformation, field assembly can be carried out, and the measuring ranges and precision of the distance measurement sensor and the angle measurement sensor can be adjusted according to the position and opening width of the crack.

The present invention provides an indicator and indicator cartridge that shows the amount of material on a roll. The roll preferably has at least one toothed sprocket, the indicator, and includes a rotatable rod which is rotated through engagement with the rotating roll. At one end of the rod, a pinion gear is fixed to engage the toothed sprocket. An indicator member is slidingly configured to engage the rod such that the rotation is at least partially converted to linear motion of the indicator member. The rod and the indicator member are preferably threaded. A reference point is included for showing the linear displacement of the indicator member relative to the rod.

The invention discloses a real-time measurement device for dynamic positions and poses. The real-time measurement device for the dynamic positions and poses can be applied to real-time accurate position and pose measurement of a to-be-measured object in a dynamic environment and comprises a datum emission and transmission system, a dual-screen laser imaging system, a binocular visual inspection system and a data processing system, wherein the datum emission and transmission system provides three-dimensional angle datum for position and pose measurement by utilizing cross-line laser and a distance between a measured object and the measurement datum is obtained through combination with a distance measurement function; the dual-screen laser imaging system receives the cross-line laser and performs imaging on receiving screens; the binocular visual inspection system shoots cross-line laser images on the two receiving screens in real time and extracts position information of the cross-line laser center under the image coordinate system and an included angle between the cross horizontal line and a horizontal axis of the image coordinate system; the data processing system comprehensively processes data information of each system and calculates real-time positions and poses of the measured object relative to the measurement datum. The real-time measurement device is high in measurement precision, adjustable in measuring range and precision and suitable for measuring object positions and poses in a vibration environment.

The value of the pixel at the same position of each of the training input image as well as a plurality of training feature images is inputted into the discrimination device, which learns in such a way as to reduce the error between the output value obtained from the discrimination device and the value of the pixel at the aforementioned pixel position in the training output image. At the time of enhancement processing, the feature image is produced from the image to be processed, and the values of the pixels of these images at the same position are inputted into the discrimination device, thereby outputting the enhanced image wherein the value outputted from this discrimination device is set as the value of the pixel at the aforementioned pixel position.

The invention discloses an annular neighborhood reference contour line-based grid model adaptive layering method. According to the method, the maximum thickness and minimum thickness of layers and residual height accuracy values are determined; the annular neighborhood surface patch order of vertexes is adjustable; initial vertexes are selected from model grid vertexes to construct a reference contour line; the initial vertexes are recursively traversed, so that vertexes with the maximum Gaussian curvature are obtained; multi-criteria fitting is performed all the vertexes with the maximum Gaussian curvature are obtained; multi-criteria fitting is performed all the vertexes with Gaussian curvature extreme values, so that an annular neighborhood reference contour line can be obtained; and grid model layer thicknesses are adaptively set from bottom to top according to the non-monotonic form change rate along a layering direction; residual height analysis is performed on the thickness of each layer; the steps of the method are repeated, so that the layer thicknesses of a plurality of neighborhood reference contour lines are obtained; and iterative weighting is performed, so that the final thickness of each layer is obtained, and the splicing plane position of each layer is determined, and splicing is performed. With the method of the invention adopted, the inner and outer surface forms of a grid model can be expressed in a multi-dimension manner, the accuracy of adaptive layering and slicing can be improved, and the high-precision layering and slicing of a geometric grid model with sharp changes in the inner and outer surface can be facilitated.

A liquid crystal display is provided with: a tap adjustment register for adjusting a gray scale level to a gray scale voltage in intermediate portions close to the end portions of the gamma characteristic; and a partial-voltage-ratio adjustment register for adjusting a ratio of a gray scale voltage among a plurality of gray scale levels in the intermediate portions close to the end portions of the gamma characteristic, in addition to an amplitude adjustment register for adjusting an amplitude of a gamma characteristic which determines a relation between gray scale levels and gray scale voltages or brightness levels on a display panel; a gradient adjustment register for adjusting a gradient of intermediate portions of the gamma characteristic while fixing end portions of the gamma characteristic; and a fine adjustment register for finely adjusting the intermediate portions of the gamma characteristic for each gray scale level.

The present invention provides a time-to-digital converter which comprises the following components: a coarse detecting circuit, an interface circuit and a fine detecting circuit, wherein the coarse detecting circuit finally realizes time-to-digital convection in a large input range by means of counter through designing a delay line to an annular member and multiplexing a judging unit as a delaying unit. The interface circuit is used for transmitting a time allowance which is generated by the coarse detecting circuit to the fine detecting circuit. The fine detecting circuit realizes high-precision time-to-digital convection with adjustable precision through adjusting a gate oxide capacitor of a field effect transistor and fixing the frequency difference between two oscillators in a differential annular oscillator to a fixed small value. Overall, through the three modules, the time-to-digital converter of the invention can perform high-precision large-range convection on the time interval through a relatively small area expenditure.

The invention relates to a configurable digital correlator for a complete polarization microwave radiometer system. At a radio frequency front end of the complete polarization microwave radiometer system, a signal after frequency-mixing amplification and orthogonal transformation is transformed to be a differential signal and then is input into four ultrahigh-speed ADC (Analog to Digital Converter) input ends to be converted into a digital signal after sampling conversion, and the digital signal after multi-path multiplexing is input into a digital correlative circuit; the digital correlativecircuit comprises a parameter selection module and a correlative calculation module, wherein the parameter selection module returns a command to modify a digital correlative digit parameter and an integration time parameter in an FPGA (Field Programmable Gate Array) through a serial port of a computer to configure the FPGA in real time so as to realize digital correlation from 2 bits to 12 bits and selection of the integration time from 5ms to 50ms; and the correlative calculation module executes deceleration and correlative calculation processing on the input digital signal after determiningquantization digit and the integration time and outputs a correlation result to a computer through a data format conversion and external interface circuit according to a required sequence.

This invention discloses a digital locking indictor, comprising a joint gate, a delay circuit, a trigger set, a selector and a controller, which are sequentially connected. This invention further discloses a phase lock loop frequency synthesizer, comprising a phase detection discriminator, a charge pump, a loop filer, a voltage-controlled oscillator, a frequency divider and a digital locking indictor, which are sequentially connected. The digital locking indictor comprises a joint gate, a delay circuit, a trigger set, a selector and a controller, which are sequentially connected. This invention further discloses a wireless transceiver, comprising a phase lock loop frequency synthesizer. The phase lock loop frequency synthesizer comprises a digital locking indicator. The digital locking indicator comprises a joint gate, a delay circuit, a trigger set, a selector and a controller, which are sequentially connected. The precision of the locking indicator can be adjusted by using this invention; the influence due to the current leaked by the charge pump can be effectively conquered because the locking indicator is insensitive to the reference frequency. And the phenomenon of wrong locking indication caused by cycle slip can be eliminated.

The invention discloses a dual-path camera anti-shaking system for an engine room of a wind-driven generator, belongs to the technical field of wind power generation devices, and aims to solve the problem, which cannot be solved by existing inventions and technologies, of complex, changeable and unpredictable shakes of a fan. The shaking condition of a camera and mobile robot vision system is relatively simple, so that simple shake problems can be solved by an existing anti-shaking device for the camera and mobile robot vision system only. According to the dual-path camera anti-shaking system, a multi-sensor fusion technology and collaborative control over multiple paths of motors are adopted, and the shaking direction and distance can be detected and returned in real time to calculate an optimal path for compensation and correction; moreover, a conventional PID (proportion integration differentiation) control algorithm is not adopted by the invention, and instead, a model-free self-adaptive control algorithm is adopted to implement collaborative control over the multiple paths of motors to fulfill the aims of real-time detection, accurate control, rapid correction and video anti-shaking.

The invention discloses a multi-channel-based high-speed ADC phase self-correcting method, comprising the steps of collecting data; selecting a reference channel and calculating the phase differencesof channels according to the reference channel; and calculating a corrected value and carrying out self-correcting. According to the method, the phase delay of the channels is effectively eliminated,synchronization precision is adjustable, and the practicability is excellent. The method is based on an array design, so that the instantaneity of processing signals is high; the analog-digital docking part has fewer data lines and good signal integrity and reduces the system complexity; a radio frequency preprocessing module is eliminated, so that the power consumption is low and the size is small; the number of channels of an array is configured according to different requirements, thus the use is flexible and convenient; and the sampling rate is configured according to different requirements, thus meeting different application requirements.

The invention discloses a time synchronization method based on a hybrid bus of an RS485 and the Ethernet. A star topology network is formed among Ethernet nodes, an RS485 node forms a chain topology network with the Ethernet nodes, and after time synchronization is completed in the star topology network, the RS485 node synchronizes with the Ethernet nodes by the following steps of: 1, transmittinga delay request information packet including record transmission time to the Ethernet nodes; 2, receiving a returned delay response packet and recording reception time, wherein the delay response packet includes the time when the Ethernet nodes receive the delay request information packet and the time when the delay response packet is transmitted; 3 calculating network delay time; 4, and receiving synchronization information packets transmitted by the Ethernet nodes at a fixed time interval, and performing clock correction according to local timestamps included in the synchronization information packets. The time synchronization method realizes the transmission of time information between different topologies, and effectively solves the clock synchronization problem of the hybrid bus.

The invention discloses a filter box capable of adjusting filtration stage number and precision, which comprises a box body (1) and a filter plate (2), a filter screen (23) is arranged on the filter plate (2), the filter box comprises one or more filter plates (2), the corresponding positions of a front panel (11) and a rear panel (12) of the box body are provided with one or more rectangular apertures (15), the size of the rectangular aperture (15) is matched with size of the filter plate (2). The invention uses the multistage filter plate (2) capable of changing, the users can install the filter plates (2) with different numbers according to the requirement, so that the different filtration precision is achieved, the filter box capable of adjusting filtration stage number and precision has strong adaptability in the workplace environment.

The invention discloses a low-voltage transformer area power supply loop abnormity analysis method based on impedance calculation, and relates to the field of power grid power supply analysis. The current electricity stealing condition is difficult to discover, the electricity stealing causes certain loss to an electric power company, one-by-one investigation is carried out by sending manpower tothe field, and the cost is high. The invention comprises the following steps: acquiring ammeter data, when |i1-i0|>s0 and |i1-i0|>s1, then adding the vector into an impedance calculation record table;when the record number in the record table is greater than or equal to the set value n, then deleting the vector with the minimum value of |i1-i0| from the record table to add current vector into therecord table, arranging the record in the sequence from large to small according to the current break variable (|i1-i0|), and calculating impedance, the impedance calculation result=|(u0-u1)| / |(i1-i0)|; and when the calculated impedance value is larger than the impedance set value, analyzing the user. According to the technical scheme, the fault type can be found and positioned in advance, on-site maintenance is arranged in time, the low-voltage loop disconnection fault can be avoided through impedance online monitoring, the equipment fault time is reduced, and the working efficiency and theuser satisfaction are improved.

The invention discloses a motor rotor angle predicting device which comprises a plurality of Hall sensors and a micro-control unit. The Hall sensors are electrically connected with the micro-control unit and evenly distributed on the periphery of a motor rotor. A counting device is disposed in the micro-control unit. The motor rotor angle predicting device can calculate current motor rotor angles in real time, provides an excellent motor rotor angle solution for motor control algorithm, is suitable for state detection of a motor controller and a motor, improves efficiency of the motor controller, and guarantees stability of the motor. In addition, the motor rotor angle predicting device is low in cost, highly practical and precision-adjustable.

The present invention discloses a method for distributing bandwidth resource of streaming media application with optimized energy consumption, and is adapted to the scenario of distributing bandwidth resource of the streaming media of a single base station in a mobile cellular network. A bandwidth distributing controller deployed between the base station and the core network regularly collects information such as service bandwidth of the network streaming media application, signal strength information of each user, the rate of playing the video by each user, the streaming media data size requested by the user; and when the mobile user in the network requests the streaming media data, the bandwidth distributing controller runs the energy consumption optimized streaming media bandwidth resource distributing algorithm, to distribute bandwidth for the streaming media user in the cellular network. The present invention can ensure limited buffer time and relatively fair services for all users, and each user is enabled to have a relatively small energy consumption, moreover, the present invention further allows the network manager to control the complexity of the algorithm and the accuracy of the algorithm via the accuracy parameters, and to achieve the balance between the mobile terminal energy consumption and the user video buffer time according to the adjustment coefficient V at the same time.

The invention discloses a converter station sound field simulation method and system, and the method comprises the steps of collecting and obtaining a noise signal of a to-be-tested sound production device of a converter station in a preset time based on a sound source positioning extraction method, and carrying out the calculation, and obtaining an actual measurement sound pressure value of a predetermined position of the to-be-tested sound production device; modeling the to-be-tested sound production equipment through noise prediction software; presetting the sound power of the to-be-testedsound production equipment; simulating to obtain a simulated sound pressure value of the preset position of the to-be-tested sound production equipment; calculating a difference value between the simulated sound pressure value and the actually measured sound pressure value; if the difference value meets the preset convergence condition, completing sound field simulation; if the difference does notaccord with the preset convergence condition, adjusting the sound power of the to-be-tested sound production equipment; and assigning the real value to the model for sound field simulation. The method and the system can improve the sound field simulation accuracy of the converter station, and can be applied to noise standard exceeding responsibility division and noise treatment scheme verification of the extra-high voltage converter station.

The invention discloses a method for clock division, which comprises the following steps: fixing the current division coefficient at real time through the input clock signals and the output clock information, counting the input clock signals through the integer part and the decimal part of the division coefficient and the decimal carry threshold value of the decimal part, according to the counting result, beginning accumulative counting which takes the decimal part as the accumulated value, and finally controlling the output clock according to the counting result and the accumulative counting result. The invention further discloses a clock division device. Through the method and the device, the output signals can be dynamically adjusted according to the input signals, and the precision of the division coefficient can be adjusted by increasing the bit widths of the integer part and the decimal part of the division coefficient and the decimal carry threshold value of the decimal part according to needs.

The invention relates to a test method of a high-precision dynamic comparator. The method is characterized by: firstly, through a clock control SR latch, determining an output state of the comparator and inputting a determined output signal into a unity gain amplifier; secondly, providing a second order integrator and providing a feedback voltage for the comparator after positive integration or backward integration is performed to positive and negative of the signal which passes through a buffer and is output by the unity gain amplifier. Besides, the invention provides a test circuit which can realize the above method. In the invention, through one simulation to the dynamic comparator, an input offset voltage can be obtained. Test precision can be controlled by human beings. Rapidity and accurate adjustability of the test can be realized.

The invention discloses an air humidity measurement method with low power consumption. The method comprises the following steps of: allowing a fixed resistor and a humidity-sensitive capacitor to form a resistor-capacitor (RC) circuit, allowing the RC circuit, a comparator in a microcontroller chip and a timer module to form a measuring circuit, and respectively measuring count values of a timer in two humidity states when the humidity-sensitive capacitor is charged to certain voltage and an output end of the comparator in the microcontroller chip produces input capture interruptions of the timer in a standard humidity environment; and saving humidity values and the corresponding count values in a storage of equipment, and effectively establishing the linear relation between the humidity and a count value, so that a measured practical humidity value is accurately calculated according to the measured count value in the practical use. The measurement method is simple, low in cost and power consumption and high in measurement accuracy, precision values can be adjusted according to application requirements, the self-correction can be performed, and the industrialized batch production of temperature and humidity instruments are convenient.

The invention discloses a method and apparatus for creating road mesh based on Unity engine terrain system. The method comprises the following steps: acquiring sampling points from scene to create road curves; obtaining vertices of piecewise grids, and creating vertex preparatory arrays; creating a bounding box of vertices of a segmented mesh and a cutting face; creating a secondary vertex preparation array; creating a triangular index array of secondary vertex provisioning arrays; a sub-level vertex preparation array being obtained by cutting a secondary vertex preparation array with a cutting surface, and a sub-level triangle index array being obtained by reorganizing that triangle index array; obtaining a UV array of child vertex preparatory arrays based on a cutting surface; the road mesh being created by using child vertex preparation array child triangle index array and UV array. The invention discloses a road grid creation method and device based on a Unity engine terrain system, which can create a road model completely conforming to the Unity engine terrain system.

The invention relates to a method for positioning and segmenting heart sound signal and a device. The device comprises a preprocessing unit, an initial state determination unit, a calculation unit, afirst search unit, a second search unit and a segmentation unit, wherein the preprocessing unit comprises a filter functional module which is used for preprocessing the heart sound signal and filtering noise out of band; the initial state determination unit is used for determining a start cycle, the maximum cycle and an initial point; the calculation unit is used for calculating correlation coefficient of signals in two adjacent calculation cycles; the first search unit is used for searching correlation coefficient extremum 1 in the correlation coefficient; the second search unit is used for search correlation coefficient extremum 2 in the correlation coefficient extremum 1; and the segmentation unit is used for segmenting the heart sound signal. In the invention, the method for positioning and segmenting the heart sound signal and the device use a self-correlated coefficient method to position automatically and accurately.