84results about How to "Accurate detection accuracy" patented technology

The invention discloses a ground penetrating radar roadbed disease target detection method based on a convolutional neural network. The method comprises the steps of obtaining original image data of ground penetrating radar simulation and actual collection; performing corresponding preprocessing on the original image data to obtain ground penetrating radar preprocessed images; marking and storingtarget information in the original and preprocessed images; constructing a PASCAL VOC data set by the ground penetrating radar image and the marking information file, and dividing the PASCAL VOC dataset into a training set, a verification set and a test set; dynamically setting an anchor frame parameter initial value in combination with the marked target frame aspect ratio; and then adopting a Cascade R-CNN network built by training set training and verification set fine tuning to obtain a convolutional network model, evaluating the performance of the network model by using the test set, andfinally realizing accurate and rapid detection of the roadbed disease target of the ground penetrating radar. The method does not depend on artificial identification, has strong generalization ability, and can realize rapid and accurate detection of roadbed disease targets.

A displacement detection apparatus (5) for a linear motion mechanism (3c) includes a nut member (36), a rod (2) including elongate grooves (2r, 2s) elongating in an axial direction of the rod (2) and a through hole (2h), a permanent magnet (5b) disposed parallel to the rod (2), a magnet block (50) made of synthetic resin and including a retaining portion (52) holding the permanent magnet (5b), a pair of leg portions (53) extending from ends of the retaining portion (52) that are spaced apart, and a nut (54) made of metal insert-molded at an intermediate position between the pair of leg portions (53), and a displacement sensor (5a) disposed opposing to the permanent magnet (5b). The pair of leg portions (53) and the nut (54) of the magnet block (50) are disposed in the elongate groove (2r) of the rod (2) and the magnet block (50) is fixed to the rod (2) by a bolt (51) screwed to the nut (54), the bolt (51) penetrating through the through hole (2h) extending through the rod (2).

A variable speed drive wherein an impact to be transmitted to an inputting mechanism is absorbed. A shift spindle has an input side end portion to which an inputting mechanism is connected and an output side end portion supported for rotation at a transmission side supporting portion provided on a transmission case. A master arm is positioned between the input side end portion and the output side end portion in an axial direction of the shift spindle. An extension collar member is fixed integrally to the master arm. The extension collar member connects the master arm and a connection portion provided at a location of the shift spindle rather near to the input side end portion than the output side end portion. The extension collar member extends from the connection portion toward the master arm with a gap left from an outer circumferential face of the shift spindle.

The invention provides a flatness testing and distinguishing device for a network transformer, which relates to the technical field of testing equipment and includes a frame, a first guide rail installed obliquely on the frame, a detection mechanism arranged in the frame, a fixed The material guide trough connected to the upper end of the first material guide rail, the discharge chute fixedly connected to the lower end of the first material guide rail, the PLC controller installed inside the frame and the control panel installed on the surface of the frame, the first material guide There is a worktable in the middle of the rail, and the detection mechanism is located on both sides of the workbench. The discharge chute includes the first discharge chute and the second discharge chute. Fixedly connected with the second guide rail extending to the bottom of the movable plate, the guide rail is equipped with an air blowing device that can spray air in the feeding direction, PLC controller and detection mechanism, material guide groove, control panel, workbench, and discharge Groove, activity board connection. The invention can accurately and efficiently distinguish the blanking while improving the detection precision.

The invention discloses a lightweight human face 3D key point detection method and system. The method comprises the steps of performing dimension reduction projection on N 3D reference coordinate vectors of human face key points in a database in three two-dimensional planes; constructing a joint encoding sub-network based on the k-order improved hourglass network, and jointly encoding the N 2D reference coordinate vectors under each 2D view angle into a 2D joint thermodynamic diagram by utilizing the joint encoding sub-network; superposing the 2D joint thermodynamic diagrams under the three 2Dview angles into a 3D joint thermodynamic diagram by adopting a concat method; and constructing the decoding sub-network based on a 2D full convolution network, and decoding the 3D joint thermodynamic diagram into N 3D detection coordinate vectors by using the decoding sub-network. According to the invention, a corresponding lightweight neural network (a joint coding sub-network and a decoding sub-network) is designed to carry out joint thermodynamic diagram generation and 3D coordinate regression; according to the method, the advantages of the existing 2D and 3D face key point detection method are combined, the model parameter quantity is reduced while the high detection precision is maintained, and the model operation speed is improved.

The invention, which belongs to the technical field of textile machinery equipment, provides a textile slitting machine based on industrial camera positioning. The textile slitting machine comprises acoarse centering mechanism, a fine deviation correcting mechanism, a flattening mechanism, a re-correcting mechanism, a feeding mechanism, a detecting mechanism, a cutting mechanism and the like thatare arranged successively from front to back. The detecting mechanism includes a backlight emitter, an industrial camera and an industrial personal computer; the backlight emitter is arranged below apiece of cloth and is used for emitting a light source to the cloth; and the industrial camera captures an opening slit on the cloth and a surrounding environment pixel difference, and transmits thepixel difference information to the industrial personal computer for processing through wired communication. The cutting mechanism includes a cutter, a servo motor and a lifting cylinder; the servo motor controls the cutter to move left and right based on cooperation of a gear and a rack. Compared with the infrared radiation positioning, the industrial camera positioning enables the recognition rate and the detection precision to be improved; visual image information can be provided; and thus the worker can operate the machine easily.

The invention belongs to the field of computer vision and media calculation. According to the technical scheme, in order to achieve the purpose that regularized arrangement is carried out on any irregular super-pixel structures, a maximum cohesiveness super-pixel gridding method and a super-pixel-level image processing method comprise the following steps that (1) each super-pixel is placed into a virtual rectangular grid in a dynamic mode on the basis of coordinates of the super-pixels according to a super-pixel division result of a target image, wherein the structure of the grid needs to reserve integral coherence of an original super-pixel structure, connection among super-pixels, local features and global features to the maximum extent; (2) the effect of occupation of the positions of the grids and the effect of energy transmission are achieved through introduction of fake nodes; (3) the positions of the fake nodes in the virtual grids are rearranged through a stacking type dynamic programming algorithm to achieve the purpose that cohesiveness of the super-pixel grids is maximized. The maximum cohesiveness super-pixel gridding method and the super-pixel-level image processing method are mainly used for carrying out regularized arrangement on any irregular super-pixel structures.

The invention discloses a device and method for detecting the deflection of a main engine of a marine diesel engine. The device for detecting the deflection of the main engine of the marine diesel engine comprises line fixing and pulling frames fixed to the two ends of an engine base of the main engine of the diesel engine, equal altitude blocks, a steel wire rope and a measurer, wherein a tensioner is arranged on one line fixing and pulling frame, a tension regulator is arranged on the other line fixing and pulling frame, one end of the steel wire rope is connected through the tensioner, the other end of the steel wire rope regulates the tension of the steel wire rope to a specified value through the tension regulator, then the deflection of the main engine of the marine diesel engine is measured, and whether the deflection of the main engine is within a control range is judged to detect whether the main engine meets requirements. The deflection of the main engine of the marine diesel engine is measured through the combination of the measurer commonly seen in the market, the tensioner and the tension regulator fixed on the line fixing and pulling frames, the two equal altitude blocks and the steel wire rope, detection accuracy is high, cost is low, and the device for detecting the deflection of the main engine of the marine diesel engine is suitable for being widely used by shipbuilding enterprises.

The invention discloses a broadband probe coaxial coupler. The broadband probe coaxial coupler comprises a main connector and a coupling connector, wherein the main connector comprises an inner main connector conductor, an outer main connector conductor and a main connector insulator; the coupling connector comprises an inner coupling connector conductor, an outer coupling connector conductor and a coupling connector insulator; the outer main connector conductor comprises a cylindrical cylinder body, at least one radial through hole is formed in the cylinder body, the coupling connector is detachably and fixedly mounted at the radial through hole, and the inner coupling connector conductor is coaxially arranged with the radial through hole; and at least one low-impedance section is arranged among the inner coupling connector conductor, the outer coupling connector conductor and the outer main connector conductor. The broadband probe coaxial coupler has the beneficial effect that the structure is simple, the loading capacity is large, and the intermodulation effect is low; and furthermore, the increase of the coupling degree along the frequency is effectively reduced, a coupling degree curve can meet the coupling flatness requirement in a relatively wide frequency band range such as 1.7GHz-3.6GHz, and the precision of microwave signal detection is greatly improved.

A lead screw accuracy detector comprises a detection table and a transverse support, wherein a grating detection device is arranged above the detection table and comprises a grating ruler, a grating data displayer and a movable support. The grating ruler is fixed on the detection table in the horizontal direction, transverse guide rails are arranged on two sides of the grating ruler, the movable support is clamped on the transverse guide rails, a grating detector is arranged on one side of the movable support close to the grating ruler, the grating data displayer is connected onto the grating detector, and a rotary lead screw positioning measuring head is arranged at the front end face of the movable support and fixed on the front end face of the movable support through a longitudinal adjusting device of the measuring head. A pneumatic clamping device is arranged on the left side and the right side of the upper portion of the detection table respectively, and the pneumatic clamping devices are connected onto a pneumatic controller through pressure pipelines. The lead screw accuracy detector can confirm lead screw accuracy fast and has the advantage of being low in production and manufacturing cost, easy to operate and the like.

The invention relates to a lightweight part defect detection method based on single sample learning. The defect detection of the component is realized by utilizing a machine vision technology and using a component image acquired by the existing optical detection equipment, including qualitatively judging whether the component has a problem or not and giving a possible area with the defect. The method provided by the invention does not need manual sample labeling, is low in data acquisition cost, and can adapt to different illumination conditions.

The invention discloses a chromatographic analysis system. The chromatographic analysis system comprises a chromatographic card and a chromatographic analyzer for reading and analyzing the chromatographic card, wherein the chromatographic card comprises a card seat and a card cover; the card seat comprises a card seat body as well as two or more card arms uniformly arranged on the peripheral surface of the card seat body, distributed in a radial manner and positioned on the same plane as the card seat body; a sample groove is formed in the card seat body; chromatographic strip placing grooves are formed in each card arm; sample inlets for communicating the sample groove with the corresponding chromatographic strip placing grooves are formed in the groove wall of the sample groove; the card cover comprises a card seat body cover and card arm covers, which are matched with the card seat in shape; a sampling hole is formed in the card seat body cover; a reading window is arranged on each card arm cover; the chromatographic analyzer comprises a lower analyzer casing, a sample result analyzing unit used for reading and analyzing the chromatographic strips, and a chromatographic card rotating unit for driving the chromatographic card to rotate by a fixed angle. According to the chromatographic analysis system, needed samples are fewer, the results of different indexes of the samples can be continuously detected and analyzed, the operation is simple and convenient, and the detection efficiency is high.

The invention belongs to the technical field of sensors, and particularly relates to a dual-light adjustable infrared gas sensor which comprises a shell, and a liquid crystal operation screen is arranged on one side of the shell; a reflecting mirror is arranged on one side of the inner wall of the shell, a reference infrared light source is arranged on one side of the reflecting mirror, a reference filter is arranged on the other side of the reference infrared light source, a reference gas chamber is arranged on the other side of the reference filter, stable gas is arranged in the reference gas chamber, and a reference sensor is arranged on the other side of the reference gas chamber; a detection infrared light source is arranged on one side of the reference infrared light source, a detection filter is arranged on the other side of the reference filter, and a detection gas chamber is arranged on the other side of the detection filter; according to the device, the working reliability can be effectively improved, the detection precision is improved, the detection difficulty is reduced, the reference infrared light source and the detection infrared light source can be calibrated, the reference sensor and the detection sensor are prevented from drifting, and the stability of the detection device is ensured.

The invention discloses a centrifugal object maximum tension detection device which comprises a bottom supporting substrate. Because mechanical detection is adopted, the device is low in cost, does not need to rely on two many electronic elements, has a relatively simple structure and is suitable for small and medium-sized enterprises. Because the device uses centrifugal force for detection, the three important factors, namely, the rotating speed, the radius distance and the weight mass, can be manually controlled, and the device is of high detection precision and adaptability. The device is provided with a reverse threaded structure rotary effective distance adjusting mechanism, so that the distances of components can be adjusted according to a symmetry line, and tensions at the same degree can be generated at the two ends of a detected object. The device is provided with a threaded structure connection combined weight conversion mechanism, so that the weight of the device can be changed, and the tension can be changed. In addition, the device is provided with a threaded structure screwing type component insertion fixing mechanism, so that a straightened object can be fixed, and then, work can be conducted.

The present invention discloses a key gear angle detection device and method. The key gear angle detection device comprises a connecting plate (1), one end of the connecting plate (1) is equipped with a key rotating mechanism, and the other end is equipped with an angle detection mechanism. The key rotating mechanism is connected with the angle detection mechanism via a synchronous belt (2), the angle detection mechanism comprises a detection end synchronizing wheel (7), and the detection end synchronizing wheel (7) is connected with a detection end rotating shaft (8). The detection end rotating shaft (8) and the connecting plate (1) are connected movably, the head end of the detection end rotating shaft (8) is also connected with an optoelectronic switch sheet (9), and the tail end is also connected with an encoder (10). The optoelectronic switch sheet (9) is connected with an optoelectronic switch (11), the optoelectronic switch (11) is connected with the encoder (10), and the detection end synchronizing wheel (7) is connected with the key rotating mechanism via the synchronous belt (2). The key gear angle detection device and method of the present invention has the characteristics of being convenient to use and accurate to measure, and being strong in versatility.