460 results about "Actual length" patented technology

The invention relates to a monocular vision measuring method for an iron tower. According to the method, the measurement of rod pieces of the iron tower in a full-width photo is realized by the actual length represented by unit pixel distance at a specific position in the photo. The method is finished by the following processes of: camera calibration, camera elevation (vertical angle) measurement, camera visual angle (divergence angle) calculation, image correction and the like, wherein the camera calibration is finished at one time; the image correction, the divergence angle calculation and the like can be finished by computer programs; and therefore, a rapid measurement task is realized. According to the method provided by the invention, the measurement work can be finished rapidly only by using a camera and a range finder; the iron tower only needs to be shot once, and then image calculation and processing are performed in an office, so that the aim of measuring the iron tower is fulfilled without influence caused by charged and weather conditions; much data information is obtained by the measurement; and all rod pieces can be measured at the same time.

The invention provides a fine vehicle type identification and flow statistics method based on deep learning and trajectory tracking. The method comprises the steps of obtaining vehicle images and establishing a sample set; Marking the position and type of the vehicle, the position of the wheel and the type information of the wheel in each picture; According to the vehicle images in the sample setand the corresponding annotation information, training an established deep learning model; Utilizing the deep learning model to predict the position and type of the vehicle, the position of the wheeland the type information of the wheel in the image; Estimating the actual length and height of the vehicle and the number of side wheels in the video according to the pinhole imaging model, and performing fine classification on the vehicle type; And obtaining a motion track of each vehicle in the video by utilizing a tracking and matching algorithm, and counting the flow of different types of vehicles according to the motion tracks.

The invention discloses a length-fixed sawing machine for pipes or profiles. The length-fixed sawing machine comprises a conveying machine frame and a clamping machine frame, the conveying machine frame is provided with length measurement supporting roller sets, conveying roller sets at a conveying station, a length measurement device and a transverse shifting mechanism; the clamping machine frame is provided with a clamping trolley longitudinally in a sliding mode, the clamping trolley is connected to a length-fixed conveying motor in a transmission mode, a locating baffle is arranged at the downstream end of the clamping machine frame in a sliding mode and is connected to a baffle drive device, and a sawing machine head is arranged at the downstream position of the locating baffle. According to the length-fixed sawing machine, the cutting amount can be divided after the actual length of the pipes or the profiles to be cut is measured accurately, the tolerance is dispersed in all the cut sections of the pipes or the profiles, and therefore zero-stub bar and zero-tailing cutting can be realized.

The embodiment of the invention relates to a method and a device for processing message, wherein the method comprises: receiving the message and storing the message into a buffer memory unit; determining a buffer memory queue corresponding to the message; judging whether the sum of the length of the message and the actual queue length of the buffer memory queue is less than or equal to the queue allocation length in the buffer memory queue; if so, adding the message to the buffer memory queue by updating the content of a buffer memory item message pointer in the buffer memory list of the buffer memory queue as the starting memory address of the buffer memory unit containing the message; and updating the buffer memory item index and the queue enqueueing index in the buffer memory list to establish the new index for the message; and updating the actual length of the queue length into the actual length after the message is memorized. The embodiment of the invention provides a method for dynamically adjusting the buffer memory bandwidth of the queue, in the method, the massage is stored in the buffer memory of the queue by judging sum of the length of the massage and the actual lengthof the buffer memory of the queue as well as the configurated length of the queue in the buffer memory of the queue; and the buffer memory of the queue is changed according to the change of the chainwidth so as to improve the problems of the transmission delay because of overlarge buffer memory space and the shaking packet loss because of over-small buffer memory space of the queue and enhance the communication quality.

The invention discloses a ferromagnet magnetostrictive effect-based method for testing the length of an anchor rod, which comprises the following steps that: a magnetostrictive waveguide sensor is arranged on the free end of an anchor rod to be tested; a static bias magnetic field is applied at the mounting position of the magnetostrictive waveguide sensor; an exciting pulse signal is applied to the magnetostrictive waveguide sensor to excite mechanical vibration on the free end of the anchor rod; the sizes of the exciting pulse signal, exciting frequency and the static bias magnetic field are set to excite waveguides mainly in a longitudinal mode in the anchor rod; a receiving unit converts an elastic wave signal in a member to be tested into an electrical signal by using an inverse magnetostrictive effect, and after signal amplification, filtration and rectification, signal averaging and A/D conversion treatment, the electrical signal enters a test signal processing unit to test the actual length of the anchor rod to be tested. The method can realize the excitation and detection of ultrasonic waves in the anchor rod. The test signal contains information on the length and defects of the anchor rod and the actual length of a measured anchor rod can be measured accurately through the processing and analysis of a waveguide reflected wave signal.

Systems and methods are described for streaming multimedia data from a client to a server using HyperText Transfer Protocol (HTTP). A session is initiated with a header that identifies a content length header that is a maximum allowed by the server, regardless of the actual length of the data to be streamed. If a firewall or proxy server limits access to the server, the content length of the data is specified to be about an amount of data that can be streamed to the server in one minute. If more data remains to be streamed when an amount of data approximating the content length has been streamed, a continuing streaming session is requested and subsequent data is streamed to the server in the continuing streaming session. The process repeats until all data has been streamed.

The invention discloses a ridgelet bi-frame system-based SAR image linear object detection method, which comprises the following steps of: (1) performing histogram equalization on an input SAR airfield image to be detected to obtain an enhanced result image; (2) pre-filtering the enhanced image and performing dyadic wavelet transform-based image edge detection on a result after the per-filtering; (3) setting a threshold value T1, setting the edges less than the threshold value in image edge detection results to be zero and reserving the edge regions more than the threshold value; (4) detecting the edge line of an airfield runway according to the reserved edge regions; (5) setting a threshold value T2 and performing binaryzation processing on detected airfield runway edge results; and (6) matching binaryzation processing results with the results of an original SAR airfield image after the filtering by using a linear tracking method, and determining the actual length of the runway. The method has the advantages of no complex post-processing process, high practicality, quickness, and precision positioning, and can be used for the extraction of the airfield runway in a relatively large complex SAR image scene.

A flat high definition multimedia interface (HDMI) cable. The flat cable that is less visible in comparison to a round HDMI cable for wall mounted television setup. An HDMI connector is coupled to the flat cable. An active circuit isolates physical characteristics of the HDMI connector. The active circuit causes the flat cable to appear shorter than its actual length during HDMI compliance testing using impedance testing. Moreover, the active circuit causes a consumer electronic control (CEC) line, a display data channel (DDC) line and transition minimized differential signal (TMDS) line to actively terminate for reducing parasitic capacitance from the length of the flat cable during HDMI compliance testing. Thus, the isolation allows the flat cable to satisfy HDMI compliant testing. The flat cable may be selected from a group consisting of ribbon cable, twisted pair cable, flexible printed circuit board, micro coax cable, optical cable and glass fiber cable.

The invention relates to a traffic signal coordinated control device with a plurality of intersections, in which the system model 'green wavestrip'is not straight line but broken line and the ratio between inner trajectory slope of intersection and trajectory slope on the road equals coefficient of dampling of the said intersection. The device is provided to treat the design speed of the vehicles on the ground and inside the crossing in a same way. The device consists of a device of variable proportions, in which the device uses different scales to different components with a same length of oriented path: the ground lengths among crossings keep normal proportion of true size, but the measurement of the ground design length of gross ditch inside the crossing enlarges a multiple which is homologous to the coefficient of damping of crossing compared with measurement of the ground actual length of gross ditch inside the crossing, then drafts according to a normal proportion.

A method and a device are provided for pressure welding, in particular for the friction welding or magnetic arc welding of workpieces (2, 3). The actual length of one or both workpieces (2, 3) and a potential length deviation (DELTA 1) from a target value is measured. If a length deviation exists, the target value of at least one parameter, in particular of the friction length, friction duration, arcing time or forge force is modified. A correction factor C, by which the length deviation (DELTA 1) is multiplied, is determined for this modification. The pressure welding device (1) includes a corresponding measuring unit (12) for determining workpiece lengths and length deviations. The controller (13) comprises an arithmetic unit (14) for setting and modifying target values, taking into account the correction factor C.

Implementations are provided herein for a set of clients to concurrently have read-write access to a stream where all other clients are aware of all changes being made to the stream. A pravega node can track the data that has been written to the stream. The set of clients can dynamically read the stream. A client among the set of clients can update the stream by sending a request to the pravega node that includes the update and a total length of the stream that was written to the stream at the time of the last read update by the client. If the total length of the stream received from the client matches the actual length of the stream maintained by the pravega node, the pravega node will update the stream. If not, a failure message can be sent to the client and the client can process more reads to the stream before making another attempt to update the stream.

The invention relates to a characteristic point three-dimensional reconstruction method based on trifocal tensor, which includes the following steps: coding points, marking points and a ruler are arranged on the surface of the measured object; a digital camera is used to take photos of the measured object in multiple angles, and the photos are inputted to a computer for image processing to obtain the image coordinates (xd, x'd and x''d); all images are rearranged for normalization treatment according to the image coordinates (xd, x'd and x''d); the trifocal tensor of each group of images is respectively calculated to determine the three-dimensional point coordinates of the coding points and the marking points; each group of three-dimensional point coordinates is processed to obtain the three-dimensional coordinates (x, y and z) of each point in the unified coordinate system; the specific value of the length and the actual length is calculated through the ruler to obtain new three-dimensional point coordinates (x', y' and z') in metric space; the new three-dimensional point coordinates (x', y' and z') receive focusing control to obtain integrally optimized three-dimensional point coordinates. The three-dimensional reconstruction method in the invention has high calculation accuracy, simple use, convenient operation, needs only a portable digital camera, a common laptop, a group of coding points and marking points, and a ruler.

The invention discloses a hoisting safe distance detection method based on deep learning. The hoisting safe distance detection method based on deep learning includes the steps that the image around ahoisting hook in a tower crane structure is obtained through a camera; a worker and the hoisting hook in the image are marked, and a data set are made; the data set is trained through Faster R-CNN indeep learning; the worker and the hoisting hook in the image are recognized and positioned through a trained detection model; the pixel distance between the worker and the hoisting hook is worked outaccording to positioning information in the detection result; and the pixel distance between the worker and the hoisting hook is converted into the actual distance between the worker and the verticalprojection point of the hoisting hook according to the height of the hoisting hook and the camera and the actual length and pixel length of the hoisting hook, and then detection of the hoisting safe distance is realized. By means of the hoisting safe distance detection method based on deep learning, recognition and positioning problems of the worker and the hoisting hook in the image are effectively solved, and high accuracy is achieved on the aspect of safe distance detection.

The invention discloses a continuous casting billet laser sizing system. The continuous casting billet laser sizing system comprises a PLC unit, a laser detection unit, a display unit and a calculation unit, wherein the PLC unit controls a roller bed of a continuous casting machine and a flame cutting machine; the laser detection unit is connected with the PLC unit and is used for detecting relative positions of continuous casting billets; the display unit is connected with the PLC unit and is used for monitoring operating conditions of the whole system and allowing workers to input necessary data during debugging; the calculation unit is connected with the PLC unit and is used for converting the relative positions, detected by the laser detection unit, of end surfaces of the continuous casting billets into actual lengths of the continuous casting billets. The continuous casting billet laser sizing system has the advantages of being high in sizing precision, stable and simple in calibration, easy to install, debug, operate and maintain, low in operation cost and accurate in cutting, improves sizing rate and yield and reduces rejection rate.

A bag making machine for manufacturing bags from an elongated film having print patterns repeatedly printed on one surface or two surfaces at a print pitch corresponding to a predetermined number of bags includes a processing unit configured to process the film for each length corresponding to the predetermined number of bags, a moving mechanism configured to move the processing unit, a shooting device, and an image processing device. The shooting device includes not less than one line sensor installed with a longitudinal direction of the line sensor extending along the widthwise direction of the film and obtains a linear image extending throughout a width of the film for each shooting operation. The image processing device sequentially receives the linear images from the shooting device and detects the actual length of the predetermined number of bags of the film based on an image extending throughout the width of the film.

The present invention relates to a billet intelligent cutting method and system. The method comprises: obtaining a target cutting weight for cutting a to-be-cut billet, and the theoretical density, actual cross sectional area and actual length of the to-be-cut billet, and calculating a theoretical weight per unit length of the to-be-cut billet; calculating theoretical cut lengths for cutting the to-be-cut billet according to the target cutting weight and the theoretical weight; cutting the to-be-cut billet according to the theoretical cut lengths and obtaining a preliminary cut billet; detecting the actual weight of the preliminary cut billet; calculating a density weight coefficient of the to-be-cut billet according to the actual weight, the actual cross sectional area and the theoretical cut lengths; calculating actual cut lengths for cutting the to-be-cut billet according to the density weight coefficient, the theoretical density, the actual cross sectional area and the target cutting weight; and cutting the to-be-cut billet again according to the actual cut lengths. The billet intelligent cutting method and system are mainly applied to billet continuous casting production processes.

The invention provides a ship water gauge image automatic number reading method based on a deep learning algorithm. According to the method, the deep learning algorithm is used for performing identification positioning on the number in a ship water gauge image, thereby obtaining a digital number and a frame coordinate in the image, and a digital frame coordinate is corrected. By means of a numberarrangement rule and a human eye number reading principle in the image, a digit combination algorithm based on the human eye number reading principle is designed. By means of image color information of a ship body and water body, a method for identifying a water level in different color body color backgrounds is designed, wherein different identification methods can be selected according to different backgrounds, thereby ensuring high accuracy and high speed in water level identification. According to the position coordinate of the oblique number in each line and the position coordinate of thewater level, a length reference and oblique number correction algorithm is designed; wherein the actual pixel distance between water level and the number is calculated, and percentage of the pixel distance between the water level and the number in the actual length reference is calculated. Furthermore the number of the ship water gauge image is obtained.