44results about How to "Guaranteed real-time accuracy" patented technology

The invention pertains to the field of 'engine test equipment and test technologies', and relates to an airplane engine dynamic simulation test bed. The airplane engine dynamic simulation test bed consists of a 50-stitch interface definition, a left and right engine full privilege digital electronic controller, an engine electric control unit, an engine vibration detecting instrument, a testing part and a measuring and controlling system. The measuring and controlling system comprises a simulation/dispersion input interface card, measuring and controlling software of an embedded engine simulation model, a sensor simulation unit and an output interface card. The test bad has the advantages of complete function, high intelligent property, fast response time and capability of precisely simulating the dynamic and steady work process and fault monitoring result of the whole flight envelope internal power device system of an airplane by the engine simulation model, an electric simulation technology and a dynamic simulation technology under the condition of no real engine existing. The test bed can be used in the test study of a power device comprehensive control system of the whole system of the airplane and the function study of the airborne testing part.

The invention relates to a high-precision tracking method applied to a non-engine maneuvering target. According to the method, firstly, a target motion model containing system adaptive parameters is built according to the non-zero mean time relevant random process characteristic met by the accelerated speed in the actual target motion; secondly, the target motion characteristic is predicated according to the built target motion model; then, the current state estimation value of the target is calculated through utilizing the target state predicating value and the radar observation data value; and finally, the system adaptive parameters are corrected according to the accelerated speed estimation value of the target, the corrected system adaptive parameters are utilized for updating the target motion model, and the updated target motion model is utilized for carrying out next predication and estimation. The method has the advantages that the target with the non-engine maneuvering random character realizes the online estimation, the accuracy of a maneuvering target model for describing the actual motion characteristics is improved, and the tracking precision of the non-engine maneuvering target is improved.

The invention relates to a network locating method for wireless sensors, which is mainly used for solving the locating problem of each node in a wireless sensor network. The device comprises two nodes which are a beaconing node and a common node. The two nodes are respectively characterized in that: the beaconing node is provided with a GPS locating module and a wireless communicating module, and is used for receiving the GPS data transmitted by the GPS satellite network and decoding the telegraph message; a service network is made up of a plurality of beaconing nodes so as to provide locating service for the common node through the wireless communicating module; a processor module completes the GPS signal analysis and transmits the locating information through the wireless module; the common node collects the sensor data and sends the sensor data to a upper layer of node after processing; and at the same time the common node acquires the service to complete self-location from the locating network consisting of the beaconing nodes, and ensures the processing and transmitting of the locating information according to the needs.

The invention relates to a multimedia player interface operation control device and a multimedia player interface operation control method. The device comprises an operation recording and storing module and an operation response module, wherein the operation recording and storing module is used for recording and storing interface operation; and the operation response module is used for controlling the interface operation of a multimedia player according to the record of the interface operation. The method comprises the following steps of: recording the interface operation; and controlling theinterface operation according to the recorded content of the interface operation. By the multimedia player interface operation control device and the multimedia player interface operation control method, the device is automatically moved to the next interface control to operate a window region of the interface control by recording the interface operation and controlling the interface operation according to the recorded content of the interface operation after one item of interface operation is performed, so that the efficiency and the accuracy of the continuous interface operation are improved.

The invention provides a message transmission module, a network communication system and a communication implementation method thereof, and belongs to the technical field of industrial automation, and the network communication system comprises an NC-Link information model, a message transmission module, an IP and a TSN; the NC-Link information model is used for acquiring sending data transmitted by sending terminal equipment; the message transmission module is used for establishing port connection between the sending terminal equipment and the receiving terminal equipment, data channels and consumption queues corresponding to the channels, and transmitting the sending data to the consumption queues; the number of the consumption queues is greater than or equal to 1; the data channel comprises a real-time data channel and a non-real-time data channel; and the message format of the transmission message comprises a terminal source port, a destination port, a data state, a timestamp, a data packet serial number, a data packet confirmation number, start connection, termination connection, response, control and data. The method is compatible with the multi-source heterogeneous numerical control system and the real-time accuracy of data transmission.

The invention discloses a method for acquiring tunnel surrounding rock micro-vibration wave speed. The method includes: on the basis of a gravitational search algorithm in heuristic algorithms, arranging at least four micro-vibration monitoring sensors at the rear of a tunnel face, building a tunnel space coordinate system, accurately determining the space coordinates of the sensors, using a man-made blasting event to trigger the vibration response of the sensors, and collecting the observation arrival time of the waveform signal on each sensor; setting the accumulation absolute difference ofthe observation arrival time and calculation arrival time as the target function of micro-vibration wave speed inversion, and calculating the target function until the function value meets the termination criterion to search the micro-vibration wave speed. The method has the advantages that the tunnel surrounding rock micro-vibration wave speed can be accurately acquired in real time through the blasting event of tunnel construction, and micro-vibration precision is guaranteed; the micro-vibration wave speed can be determined without special blasting activity, and the method is economical, practical, simple to operate and applicable to the micro-vibration monitoring of tunnel projects such as traffic projects and water conservancy and hydropower projects.

The invention provides a method and a system for adaptively restoring the true color of an image. The method comprises the following steps: performing training according to the pixel gray value of a reference object in a training set and the true color information of the reference object to obtain the corresponding relationship between the pixel gray value of an image captured under the conditionof environmental spectral information and the true color information of the image; receiving a current photographed image of the imaging device and current ambient spectral information of a spectral probe balanced with the center of the optical axis of the imaging device; analyzing the current photographed image to obtain the gray value of each pixel of the current photographed image; obtaining apixel gray level compensation value of the current photographed image according to the corresponding relationship between the pixel gray level value of the photographed image under the current environmental information and the true color information of the image; obtaining a restored image of the currently captured image according to the pixel gray compensation value of the currently captured image and the gray value of each pixel of the currently captured image. The invention can quickly and accurately restore the image color.

The invention discloses a face tracking method based on an improved Camshift algorithm, and the method comprises the following steps: 1) taking a face in an initial frame of a video image as an initial face window, and taking the face as a tracking target; 2) modeling an improved Camshift tracking algorithm according to the centroid position and the window size of a tracking target, and performingcalculating to obtain an optimal candidate window in the current frame image by using the tracking algorithm; 3) calculating whether the shielding interference of the current frame image exceeds a given threshold; 4) when the interference is less than a given threshold, using the candidate window obtained in the step 2) as a target window, and returning to the target window; 5) if the interference is not less than a given threshold value, introducing a Kalman filter, carrying out predicting by taking the obtained target mass center as an observation vector, and returning a prediction result as a target window, and 6) taking an output prediction vector obtained by the Kalman filter as a search window center, and continuing target tracking of the next frame.

The invention provides a target searching method of a visual robot and the robot and relates to the technical field of robot searching. The target searching method comprises the steps that search target information is obtained, wherein the search target information comprises target features and a belonging target type; a visual camera is started to shoot to obtain a visual field image, the visualfield image is preprocessed to generate a detection image according to the detection image size requirement of a target detection neural network model corresponding to the belonging target type, the detection image is input to the corresponding target detection neural network model to perform target detection, the detection image is formed by splicing a plurality of images which have different resolutions and are related to the visual field image; and a target detection result is obtained, and whether a search target exists in the target detection result is judged according to the target features. On the basis of ensuring the real-time accuracy of far and near target search, the requirement of far and near target search on the computing power of equipment is reduced.

The invention relates to the technical field of blood pressure detection and relates to a blood pressure automatic measuring device and method based on digital control. The measuring device comprises a volume pulse wave acquisition module, a blood pressure acquisition module and a processing module. The volume pulse wave acquisition module is used for acquiring volume pulse waves of a measured object and processing the acquired volume pulse waves to acquire pulse oximeter signals. The blood pressure acquisition module is used for acquiring blood pressure information of the measured object regularly and processing the acquired blood pressure information to acquire blood pressure digital signals. The processing module comprises a first processing unit and a second processing unit. The first processing unit is used for receiving and processing the blood pressure digital signals and transmitting the blood pressure digital signals to the second processing unit, and the second processing unit is used for extracting multiple feature points of the pulse oximeter signals and jointly carrying out fitting operation on the feature points and the blood pressure digital signals to establish a blood pressure parameter measuring model. The measuring method is achieved through the measuring device. Blood pressure is automatically and continuously measured well.

The invention provides a vision-based robot following method and a following robot, and relates to the technical field of computer vision. The vision-based robot following method comprises the following steps: receiving target object information; using a visual camera to acquire a visual field input image, preprocessing the visual field input image to generate a detection input image, and inputingthe detection input image into a pedestrian detection neural network model for detection, wherein the detection input image is formed by splicing a plurality of images which have different resolutions and are related to the visual field input image; obtaining a pedestrian detection result, and determining a following target in the pedestrian according to the target object information; and carrying out robot following on the following target. On the basis of ensuring real-time accuracy of far and near target tracking, a requirement of target tracking on the computing power of equipment is reduced, and the power consumption is decreased.

The invention relates to a high-voltage ultrashort pulse power source for tumor ablation. The power source comprises a measurement and control unit, a radio frequency modulator, an isolation transformer, a demodulator and a waveform generator; the first input end of the measurement and control unit is connected to an electrocardiogram detector; the second input end of the measurement and control unit is connected to an electrode needle; the first output end of the measurement and control unit is connected to the input end of the radio frequency modulator; the output end of the radio frequencymodulator is connected to the input end of the demodulator through the isolation transformer; the output end of the demodulator is connected to the electrode needle through the waveform generator; thesecond output end of the measurement and control unit is connected with the demodulator; and the third output end of the measurement and control unit is connected with the waveform generator. According to the high-voltage ultrashort pulse power source for tumor ablation, the isolation transformer is combined with a combined module, so that electrical isolation in the high-voltage ultra-short pulse power source is achieved, and therefore, use safety is improved; multiple output pulses can be independently arranged by configuring multiple circuits, so that outputted high-voltage ultra-short pulses can be modulated, and therefore, the application range of the power source is extended.

The invention discloses a cross belt sorting method, a sorting control system and a cross belt sorting system. The sorting method comprises the steps that S1, a top surface image of a sorting trolleyis received, and the state of the sorting trolley is determined; S2, when determining that only one object exists on the sorting trolley, a sorting grid corresponding to bar code information on the object and position coordinates of the sorting grid on the sorting trolley are determined; S3, virtual coordinates are converted according to the position coordinates, wherein the virtual coordinates are four vertex coordinates of a minimum enclosing rectangle of projection of the object on the sorting trolley; S4, a sorting starting point is calculated according to the virtual coordinates and the target sorting grid; and S5, when the sorting trolley reaches the sorting starting point, the sorting trolley is controlled to start sorting. According to the scheme, the position of the object on thesorting trolley is considered, the sorting starting point is accurately calculated based on the minimum enclosing rectangle of the object, the sorting precision can be effectively improved, the systemerror sorting rate is reduced to be lower than one ten thousandth from one thousandth, and the sorting reliability is greatly improved.

The invention discloses a planetary patrol device active path planning method based on compressed sensing. The planetary patrol device active path planning method comprises steps that: positioning andmapping of a conventional patrol device are carried out by using a SLAM method; Fisher information entropy is used for real-time examination of uncertainty of state estimation and characteristic point estimation, and a characteristic active re-observation decision mechanism is established; the compressed sensing method is introduced, when the map features are re-observed, and an L0 norm optimization problem, which is difficult to solve in the original compressed sensing problem, is replaced by an L1 norm, and noise points of non-Gaussian distribution are estimated; a Gini index function is used for examining the sparse regularities of the noise estimation sequence, and the precision of the L1 norm convex optimization method is guaranteed; and finally, the complete patrol device path planning method is established by taking the maximized Gini evaluation parameter result of the next step as an optimization index. The invention relates to the technical field of navigation guidance and control, and mainly relates to navigation guidance application for a planetary surface roaming patrol mission section.

The invention provides a mobile terminal multi-channel video stream loading method. The method comprises the following steps: S1, connecting an audio and video server; S2, acquiring a video stream channel and a video stream label through an audio and video server; S3, storing the obtained video stream channel and video stream label to the local; S4, creating a video rendering view according to the number of audios and videos; S5, binding the view of each rendering video with a video channel label; and S6, releasing or loading the video stream according to the label. According to the invention, the problems that any number of video streams cannot be opened and the real-time conditions of conference participants in the video cannot be seen in the existing loading method are solved.