44results about How to "The processing algorithm is simple" patented technology

The invention discloses an asynchronous network application program processing method. The method includes: establishing multiple threads, wherein each thread has a same operating logic; obtaining a global lock by one of the threads to obtain processing right to event queues; inquiring a to-be-processed event queue by the thread having the event queue processing right, and when to-be-processed events exist in the to-be-processed event queue, reading a to-be-processed event by the thread for processing the to-be-processed event; and when the to-be-processed event queue has no to-be-processed events, monitoring an event list by the thread, and when events are monitored by the thread, adding the events into the to-be-processed event queue. By establishing multiple equivalent threads and lock competing logics to the global lock among the multiple threads, compactness and efficiency in management of the multiple threads are realized, and software and hardware resources are saved; and by performing timeout processing through a compact thread model, a lightweight timer mechanism and a safe and efficient asynchronous information mechanism are realized.

A method for regulating a transmission of a quantity of user data between a plurality of users of a communication system via a field-bus system is provided, in which method the individual users communicate by way of data telegrams, each data telegram containing at least one destination address, one source address and a quantity of user data not exceeding a predefined, maximum quantity. In the event the maximum quantity of user data predefined for one data telegram is less than the quantity of user data to be transmitted, the quantity of user data to be transmitted is fragmented into a plurality of partial telegrams, and the respective partial telegrams are transmitted one after another in a defined sequence of partial telegrams.

The invention relates to a service flow access control and bandwidth allocation method based on an orthogonal frequency division multiplexing (OFDM) system, which mainly solves the problems of service flow access control and system bandwidth resource allocation in the OFDM system. The method of the invention essentially comprises the following steps: (1) carrying out access control according to the management information of dynamic service flow and generating a bandwidth-reserved distribution list; (2) distributing the bandwidth-reserved according to the bandwidth-reserved distribution list; and (3) distributing the rest bandwidth according to a weight factor configuration table. The method provided by the invention not only effectively improves the use efficiency of the system resources, but also ensures fairness among a plurality of service types and prevents 'starvation' phenomenon caused by that the bandwidth cannot be obtained due to the comparatively low priority of users.

The embodiment of the invention belongs to the field of image processing, and relates to a method and device for detecting an object in an image. The method comprises the steps: extracting the gray scale information of pixels in the image, wherein the pixels comprise a to-be-detected pixel and pixels adjacent to the to-be-detected pixels; obtaining a first gray scale difference value, wherein the first gray scale difference value is the maximum value of the gray scale difference values of the to-be-detected pixel and the adjacent pixels; comparing the first gray scale difference value with a first threshold value, and judging that the to-be-detected pixel is the target pixel if the first gray scale difference value is greater than the first threshold value. The device comprises an information obtaining unit, a gray scale difference value obtaining unit, and a judgment unit. According to the embodiment of the invention, the method and device can precisely obtain the detail of the object in the image, and filter out the interference from the noise points in the image. An object detection processing algorithm is simple, and is low in the cost of application in a chip.

The present invention discloses an estimation method and device of space arrival direction used in wireless communication system which applies the technique of intelligent antenna; an up-link time slot M and a renewal cycle T included in the calibration cycle are set; a time slot comprises one or more than one renewal cycle T; when the DOA estimation of space arrival direction is started, the counting unit calculates the up-link time slot in the calibration cycle and the renewal cycle in every up-link time slot; the calculation is carried out by a controller, based on the above calculating value, in the first renewal cycle of the first time slot of every calibration cycle, activating the searching machine of maximum power value to work out the DOA calibration value which is considered as the primary value or calibration value of DOA calibration; in other time of the calibration cycle, activating the arbiter of optimal demodulation signal to work out the DOA calibration value, realizing the follow of the DOA calibration value; the selector of DOA output value chooses the final DOA calibration value. The invention can lessen the complicated matrix manipulation, providing a much precise DOA calibration value.

The invention discloses a space radio frequency testing method. The method comprises the following steps: a step of establishing a spherical coordinate system, a step of selecting test points, a step of testing and a step of processing data. The method causes the spatial test points to be distributed on the spherical surface as even as possible, can reduce the number of the test points under the condition of meeting the testing accuracy requirement, thus shortening the testing time and simplifying the processing algorithm of the testing results.

The invention discloses a nudity bed rock information extraction method based on a soil index. Specifically, a holomorphy soil index and a normalized differential vegetation index are respectively calculated according to a red light band of a remote-sensing image and a near-infrared band, and a soil index chart and a normalized differential vegetation index are obtained. Nudity bed rock information is extracted according to characteristic differences of rock information and soil information in the soil index chart, and non-vegetation information is extracted through the normalized differential vegetation index chart. A picture element of the nudity bed information and the non-vegetation information is extracted to obtain the nudity bed rock information. According to the nudity bed rock information extraction method based on the soil index, a remote-sensing image picture is utilized, the extraction of the nudity bed rock information is achieved, bed rock nudity rate of a land parcel pattern spot can be analyzed based on the nudity bed rock information chart, and data support for karst area water and soil loss and stony desertification grading is provided. The nudity bed rock information extraction method based on the soil index has the advantages of being simple, fast, accurate and capable of not relying on an operator completely.

The invention relates to an alarm method pertaining to the wear of a tyre (10) having a tread (12) with at least one circumferential furrow (14), comprising: measuring the rolling noise of the tyre (10) on the ground; isolating, from the measured rolling noise, a noise generated in a predetermined frequency range close to a predetermined resonance frequency of a segment of the circumference furrow (14) upon rolling; measuring the amplitude of the isolated noise; comparing the measured amplitude to a predetermined alarm threshold.

The invention discloses a helmet attitude measurement method, device and system. The helmet attitude measurement method comprises the steps that helmet inertial navigation information, fuselage inertial navigation information and image information are received; the helmet inertial navigation information is calibrated and subjected to relative motion compensation processing through the fuselage navigation information, and thus helmet motion information is obtained; features calibrated in the image information is recognized and extracted, and thus visual pose information is obtained; and the visual pose information and the helmet motion information are subjected to data fusion, and thus helmet attitude information is obtained. According to the helmet attitude measurement method, the shortcomings that the update rate is low, reliability is poor, and the operational requirements for precision cannot be met are overcome, the update rate is increased, the reliability is improved, and the precision requirement is met.

The present invention provides a control method and device for a manipulator arm based on monocular vision positioning. First, pixel coordinates of a target point of a target object in a pixel coordinate system are obtained, then the transformation is carried out by using a homogeneous transformation matrix of a camera coordinate system relative to the end of the manipulator arm and the homogeneous transformation matrix of the end of the manipulator arm relative to a world coordinate system. Then line of sight equations are obtained. Finally, in the world coordinate system, the plane equationof the plane where a target point is located is obtained, and the target point is obtained through the line of sight equations and the plane equations. Therefore, compared with the prior art, the embodiment of the invention does not need two monocular cameras, simplifies the positioning system, and has simple operation, and does not involve the matching of image feature points and the calculationof optimal distance, simplifies the processing algorithm and reduces the requirements for hardware equipment.

The invention provides a wavefront sensor used for a solar self-adaptive optical system. The wavefront sensor comprises a collimator (1), a narrow-band light filter (2), a sampling reflector (3), a relay system (4), a beam expander (5), an attenuator (6), a phase shifter (7), an acquisition device (8) and a data processing module (9), wherein the solar radiation intensity uniformity and half-wave loss phase shift principle are utilized, and the defects that in a traditional solar self-adaptive optical system, a relevant Hartmann-shank wavefront detection technique is low in detection space resolution, low in long-scale contrast expansion object wavefront detection precision, large in wavefront detection calculation quantity, relatively lower in efficiency and the like are overcome. The wavefront sensor is simple in optical structure, small in calculation quantity, rapid in wavefront detection and processing speed, high in detection efficiency and not high in contract requirements on objects on a sun surface action area, and thus the wavefront sensor can be used for wavefront measurement on long-scale contrast expansion objects under the condition of middle and even low poor seeing degree condition, the correction bandwidth of the solar self-adaptive optical system is effectively improved, the working interval is expanded, and the correction effect is improved.

The invention discloses a synchronous shooting method of multiple cameras, a shooting device, a mobile terminal and a readable storage medium. The synchronous shooting method comprises the following steps: step one, acquiring a shooting instruction; and step 2A, controlling at least two cameras to perform overall exposure by using the same exposure duration at the same time so as to acquire at least two first shot images. Through the synchronous shooting method disclosed by the invention, the synchronization defect of dual-camera or multiple cameras in the shooting can be effectively solved.

A signal processor receives a signal containing information about a sensor that is spirally wrapped at a known pitch or separation down a pipe having a flow; and determines a flow velocity based at least partly on the information contained in the signal received by applying an autocorrelation function that depends on a relationship between the time between a repeating pattern and the known pitch or separation of the spirally wrapped sensor. The signal processor provides a corresponding signal containing information about the flow velocity. The sensor includes a strain sensor, including a piezo-electric polymer strain sensor fabricated from PVDF, and / or two or more equally spaced spirally wound sensors. The determining includes correlating output signals of two or more equally spaced spirally wound sensors to determine a time delay, and determining the flow velocity based on the time delay and the known pitch or separation.

The invention discloses an AGV positioning method for multiple sensors. According to the method, based on a QR code landmark system, a label number and position information are inserted in a QR code,in a route from a starting point to a terminal point, after an industrial camera identifies the QR code, an AGV extracts the position of a QR code characteristic point in a network, and a position deviation and gesture between the current QR code and the AGV are calculated; according to the position relation of the QR code and the AGV, the position and gesture of the AGV are adjusted, and an absolute driving angle of the AGV is determined. In addition, an installation method for a coder on the AGV is designed again, a correction algorithm for an S-shaped curve slip error is proposed, the QR code and the coder are alternatively used, and the error accumulated of the coder during large-angle range change is made up for. In order to overcome the defects that for a wheel-type AGV, a positioning method is monotonous, wheels easily slip, and the installation cost is high, the two positioning strategies are alternatively used, the practicability and stability are effectively improved, and themethod has the advantages of being easy and convenient to install and simple in algorithm processing.

The invention discloses a yarn hairiness detection device. The yarn hairiness detection device comprises a yarn conveying device, a yarn image acquisition device and a yarn image processing device, wherein the yarn image acquisition device comprises an image acquisition chamber and an area-array camera and a stroboscopic face light source which are arranged in the image acquisition chamber; an amplification lens is arranged in front of the area-array camera; the area-array camera and the stroboscopic face light source are oppositely arranged on the two sides of the image acquisition chamber; through holes are symmetrically formed in the other two sides of the image acquisition chamber; yarns penetrate through the through holes and are output by a power leather roller, and the conveying direction of the yarns in the image acquisition chamber is vertical to the amplification lens; and the area-array camera is in data connection with the yarn image processing device. By virtue of the yarn hairiness detection device disclosed by the invention, an image processing process can be simplified, and the yarn image acquisition efficiency and the hairiness detection efficiency are improved.

The invention relates to the technical field of medical instruments, particularly to a prediction model-based bladder urination time reminding method and assessment device. The method comprises collecting impedance signals of a preset position of a person to be detected to acquire characteristic parameters containing relative deviation (TBA), absolute deviation (IBC), accumulated deviation (CTBA) and current impedance (PB), performing correlation analysis and linear regression fitting on acquired impedance characters and accumulated urine deposition time when measurement stops to establish a linear model to achieve an impedance character-to-urine deposition time prediction model. By measuring the impedance data to acquire urine deposition time, the prediction model-based bladder urination time reminding method and assessment device can achieve indirect estimation of the urine deposition time by measuring the impedance signals as well as effectiveness of prompting timely bladder urination, and meanwhile, by performing linear fitting on the urine deposition time through multiple characteristic parameters, can increase the application range and the applicability of the model.

The invention discloses a method for recognizing foreign matters in bottle-packed oral liquid, and the method comprises the steps: carrying out the binarization processing of a preprocessed image; dividing the oral liquid into an upper region and a lower region, and setting threshold values for the imaging areas S, perimeters and minimum bounding matrix length-width ratios of the upper and lower regions; and judging whether the upper and lower regions have the visible foreign matters or not according to the relation of the parameters and threshold values. The method is high in precision, is good in stability, and solves a problem of recognition errors caused by the recognition of the foreign matters based on a single parameter. The distinguishing detection can achieve the effective detection of plant fibers, residuals and hairs, and also can achieve the accurate detection of the small foreign matters with a certain mass in irregular motion, and can effectively eliminate the interference caused by the bubbles. The method provided by the invention is low in equipment cost, is simple and efficient in processing algorithm, can detect various types of foreign matters, and can meet the requirements of the online production.

The invention discloses an optical cable fence system, and belongs to the technical field of monitoring. The optical cable fence system comprises a sensing optical cable and a fence, wherein the sensing optical cable is positioned on a frame at the top of the fence and is in straight line parallel to the trend of the fence; and the outside of the sensing optical cable is wrapped by a tubular structure enabling the optical cable to deform under the oppression of external force and to restore after the external force is released. The optical cable fence system is suitable for universal mounting of all fences, enhances an optical detection signal, improves the signal-to-noise ratio, lowers system installation and maintenance costs, and significantly improves structural invisibility.

The invention discloses an alternative increment type micro-displacement measurement sensor. The alternative increment type micro-displacement measurement sensor comprises a laser beam, two reflection mirrors, a photodetector I, a photodetector II, a guide rail I, a guide rail II and a control processing system. With the adoption of the sensor, the laser beam is continuously reflected between one group of two reflection mirrors which are arranged in parallel, and is finally illuminated on the two groups of photodetectors; the distance between the two reflection mirrors is changed so that a reflection path of the laser beam is changed; each group of photodetector moves on the guide rails and the photodetector senses the laser beam; and the control processing system is used for processing according to light sensing mileages and light sensing directions of the photodetectors to obtain a detection displacement value; and the control processing system can also be used for adding or subtracting a movement distance value on the rails of the photodetectors into or by the detection displacement value, and calculating to obtain a real change value between the two reflection mirrors. The sensor disclosed by the invention is simple in structure, reliable in measurement, relatively high in precision and easy to manufacture in a large batch.

An outlier processing method for three-dimensional trajectory data and an optical motion capturing method are disclosed. The claimed outlier processing method includes an input step, a judgment step,a processing step, and an output step. The claimed optical motion capturing method includes links of obtaining a measurement point two-dimensional image, calculating three-dimensional trajectory data,and processing the three-dimensional trajectory data outlier. The outlier processing method of the three-dimensional trajectory data is provided, so that the optical motion capturing system can eliminate some undesired three-dimensional data in the three-dimensional trajectory data, thereby avoiding measurement errors caused by environmental changes, and helping to improve the positioning precision of a measurement object. Because using relatively simple judgment logic and data types, the processing method avoids the harsh judgment conditions and strict standardization of data types in the existing outlier processing methods, is helpful to simplify the outlier processing algorithm and improve the working efficiency of the optical motion capturing system.

The invention discloses a method for detecting the three-dimensional texture feature of an object and a system thereof. The method comprises the steps of: emitting, by a laser, a laser beam and recording the time of emission of the laser beam; emitting the laser beam onto the opposite surfaces of the object in order that the laser beam are reflected by the opposite surfaces of the object and formsa laser echo signal, receiving the laser echo signal, and recording the time of reception of the laser echo signal; converting the laser echo signal into an electric signal according to the receivedlaser echo signal; according to the obtained electric signal, digitally identifying the electric signal to obtain a pulse intensity corresponding to the electric signal; according to the time of emission of the laser beam, the time of reception of the laser echo signal and the pulse intensity, calculating the grayscale value of the opposite surfaces of the object and outputting the grayscale value. The method can extract the overall appearance features and the texture details of the opposite surfaces of the object, is not affected by ambient illumination factors, and has good practicability.

The invention provides a monitoring-determining method and device for four redundancy signals Y1, Y2, Y3 and Y4. The method comprises that when all signals are normal, the three signals Y1, Y2 and Y3 are used for redundancy monitoring and determining, and the signal Y4 serves as a standby signal; when the signals Y1, Y2 and Y3 are all normal, a determining value YO of the signals Y1, Y2 and Y3 to monitor the signal Y4 and determine whether the signal Y4 is normal; and when abnormity is found in the signals Y1, Y2 and Y3, the standby signal Y4 is used to assist in determination of an abnormal signal, and a fault is thus confirmed. The method of the invention remains the efficacy of the four redundancy signals, and a four redundancy monitoring-determining strategy is simplified when the system signals are normal.

An optical fiber ring interferometer is provided, which is based on a common light path for two or more light beam pairs preferably originated from two or more light sources of a substantially different spectrum or from a single light source split spectrum and whereas each light beam of a specific pair is propagating in relative opposite directions, wherein at least one pair of light beams is utilized to detect acousto-mechanical events and to provide information regarding location and other characteristics of detected environmental disturbance.

In a method for alerting to the wear of a tyre that includes a tread strip equipped with at least one circumferential groove, the running noise made by the tyre running along a ground is measured, from the measured running noise, a noise emitted in a predetermined range of frequencies close to a predetermined resonant frequency of a portion of the circumferential groove during running is isolated, the amplitude of the isolated noise is measured, and the measured amplitude is compared against a predetermined alert threshold.

The invention discloses a novel alternative incremental sensor for measuring the micrometric displacement. The novel alternative incremental sensor comprises a laser beam, a fixed reflecting mirror, a movable reflecting mirror, a detection reflecting mirror, a photoelectric detector I, a photoelectric detector II and a processing system. In operation of the sensor, the laser beam is continuously reflected to the reflecting mirrors in the fixed reflecting mirror and the movable reflecting mirror which are parallel, and finally irradiates onto the two groups of photoelectric detectors, and the reflecting path of the laser beam can be changed when the distance between the fixed reflecting mirror and the movable reflecting mirror is changed; the laser beam is induced for multiple times by three detection parts on each group of photoelectric detector, the processing system obtains a detection distance value according to the laser-beam induction times and the laser induction sequence of each group of detection parts and the distance processing among the detection parts, and then can calculate out a real change value of the distance between the fixed reflecting mirror and the mobile reflecting mirror by the detection distance value; the novel alternative incremental sensor is simple in structure, reliable in measurement, higher in accuracy and easy in implementation of batch manufacture.

The invention discloses a phased array weather radar and a self-adaptive frequency selection method and system thereof. When a prior signal-to-noise ratio is greater than or equal to a set threshold value, it is indicated that an airspace interference signal is strong, and the interference signal is avoided by adjusting an azimuth angle and / or a pitch angle; if interference signals can be avoided by adjusting the azimuth angle and / or the pitch angle, that is, the prior signal-to-noise ratio under a certain azimuth angle and pitch angle is smaller than a set threshold value, the working frequency is recorded and stored; if the interference signal cannot be avoided by adjusting the azimuth angle and / or the pitch angle, that is, the prior signal-to-noise ratio under any azimuth angle and pitch angle is greater than or equal to a set threshold value, the working frequency is not recorded and stored; and all working frequencies capable of avoiding interference signals by adjusting azimuth angles and / or pitch angles are obtained, frequency selection is carried out in the working frequencies, and the interference signals can be effectively avoided by combining the corresponding azimuth angles and pitch angles. The method does not need manual participation, does not need to add a hardware structure, and is simple in processing algorithm.

The invention discloses an asynchronous network application program processing method. The method includes: establishing multiple threads, wherein each thread has a same operating logic; obtaining a global lock by one of the threads to obtain processing right to event queues; inquiring a to-be-processed event queue by the thread having the event queue processing right, and when to-be-processed events exist in the to-be-processed event queue, reading a to-be-processed event by the thread for processing the to-be-processed event; and when the to-be-processed event queue has no to-be-processed events, monitoring an event list by the thread, and when events are monitored by the thread, adding the events into the to-be-processed event queue. By establishing multiple equivalent threads and lock competing logics to the global lock among the multiple threads, compactness and efficiency in management of the multiple threads are realized, and software and hardware resources are saved; and by performing timeout processing through a compact thread model, a lightweight timer mechanism and a safe and efficient asynchronous information mechanism are realized.

The invention discloses a method for identifying visible foreign matter in bottled oral liquid. Firstly, binary processing is performed on the preprocessed image, and the oral liquid is divided into upper and lower regions, and the imaging areas of the upper and lower regions are respectively S, perimeter C, and the minimum aspect ratio N of the circumscribed matrix set the threshold value, and judge whether there are visible foreign objects in the upper and lower regions according to the relationship between the parameters and the threshold value. This method has high accuracy and good stability, and solves the problem of relying on a single parameter. Recognition of foreign objects can easily lead to misidentification problems. Partition detection can not only effectively detect impurities such as plant fibers, residues, and hairs, but also correctly detect impurities such as glass slag that are small in size, have a certain quality, and move irregularly, which can effectively eliminate them. Interference of air bubbles; the identification method of visible foreign matter in bottled oral liquid of the present invention has low equipment cost, simple and efficient processing algorithm, rich and diverse types of detectable impurities, and can adapt to the requirements of on-line production.