126results about How to "Avoid distractions" patented technology

The present invention discloses a PCB circuit board defect detection method and system, which relates to the field of defect detection, including: obtaining feature coordinates of feature positions in a standard design image; obtaining a circuit board image to be detected; obtaining at least one local difference image; obtaining a feature position consistent with the position coordinates of the local difference image; obtaining at least one conventional defect type corresponding to the target feature position; obtaining at least one feature defect image corresponding to the target conventional defect type; obtaining all combinations of at least one target feature defect image corresponding to the target feature position; obtaining a fused image; combining the fused image whose difference with the local difference image is less than a preset value; and obtaining the defect type of the PCB circuit board image to be detected. By setting a feature recognition module, a defect preprocessing module, a combination generation module and a defect recognition module, interference factors in actual situations are avoided, and defects are recognized as accurately as possible.

The invention discloses aggregation-induced emission microspheres with colorimetric-fluorescence double signals as well as a preparation method and application of the aggregation-induced emission microspheres. The aggregation-induced emission microsphere comprises a carboxyl polystyrene microsphere and an aggregation-induced emission dye embedded in the carboxyl polystyrene microsphere, the aggregation-induced emission microsphere has colorimetric-fluorescence double signals, is red under natural light, has strong absorption at 600nm, shows high luminous efficiency at 725nm, not only effectively avoids the interference of biological autofluorescence and reduces background interference, but also has good light stability and photobleaching resistance, and can be used for preparing the aggregation-induced emission microsphere. And due to the high molar extinction coefficient, the colorimetric and fluorescent double-signal output capability is realized at the same time. In addition, the aggregation-induced emission microspheres are high in reproducibility in the preparation process, have the potential of large-scale synthesis and meet the requirements of industrial batch production.

The invention provides a chain saw and an electric tool, and the chain saw comprises a working part which comprises a guide plate and a chain; the main body part comprises a shell, and the front end of the main body part is configured to be capable of installing a working part; the motor is contained in the shell and outputs power to drive the working part to work; the power supply device is detachably connected to the shell to provide electric energy for the chain saw; the display device is installed on the shell, and the display device is provided with a display interface used for displaying the running state of the chain saw; the control device is at least electrically connected with the display device; the control device is configured to respond to any one of various instructions so as to lighten the display interface. By adopting the technical scheme, the chain saw capable of automatically activating the brightness of the display interface of the display device can be provided.

The invention relates to the technical field of forklift anti-collision, in particular to a forklift anti-collision system based on thunder-vision fusion, which comprises a panoramic picture splicing module, a visual recognition and tracking module, a microwave radar module, a data processing module and a decision and control module, the panoramic picture splicing module is used for correcting and splicing pictures of front, back, left and right wide-angle cameras to form a panoramic picture of the vehicle; the visual identification tracking module is used for carrying out object detection and target tracking on the panoramic picture in real time and continuously outputting object coordinates and object types; and the microwave radar module continuously outputs point cloud picture data of objects around the vehicle. According to the anti-collision system, the accuracy and reliability of the anti-collision system can be improved, false alarms are reduced, and the anti-collision system can more intelligently and efficiently guarantee the safety of forklift operation.

The invention belongs to the technical field of power grid grounding fault positioning, and discloses a power distribution network overhead line single-phase grounding fault positioning method and a power distribution network overhead line single-phase grounding fault positioning system. Collecting an electric field signal and a magnetic field signal on the detected overhead line to calculate a voltage instantaneous value, a current instantaneous value and respective full-cycle Fourier amplitude; integrating the product of the voltage instantaneous value and the current instantaneous value in one period, dividing the integral value by the product of the full-cycle Fourier amplitude of the voltage instantaneous value and the current instantaneous value to obtain a ratio coefficient at different positions on the detected overhead line, so as to construct a function of the ratio coefficient with respect to the different positions on the detected overhead line; a single-phase earth fault occurs at the maximum value point of the first derivative of the function. Reverse power transmission is carried out on the basis that a vehicle-mounted power supply is combined with a distribution transformer, the amplitude of an injection signal is enhanced, rapid and accurate positioning of a single-phase earth fault point of the power distribution network is achieved in cooperation with an electric field and magnetic field sensor carried by the unmanned aerial vehicle, and the reliability of power supply is improved.

The invention discloses a part packaging device and part packaging equipment. The part packaging device comprises a base plate, the base plate is provided with a bottom bearing cavity and a bottom containing cavity which are communicated with each other, and the bottom bearing cavity is formed by at least part of the top of the bottom containing cavity through radial expansion; the bottom face of the bottom bearing cavity is connected with the wall face of the bottom containing cavity and extends in the radial direction towards the outside of the bottom containing cavity, and the bottom face of the bottom bearing cavity is used for bearing parts. The side, away from the bottom bearing cavity, of the bottom containing cavity expands in the radial direction to form an avoiding cavity. And the top cover is used for covering the part placed in the chassis, and the top cover is provided with a top containing cavity for containing the top of the part. The parts are transported and stored safely, the quality is guaranteed, and the part packaging device is not prone to being abraded, so that the part packaging device can be recycled.

The utility model belongs to the technical field of power battery trays, and particularly relates to a power battery aluminum tray which comprises a tray and a battery jar, a protection mechanism is arranged at the bottom of the tray, and a connecting mechanism connected with the protection mechanism is arranged in the tray and at the bottom of the tray. The first buffer pad of the protection mechanism has excellent electromagnetic shielding performance, so that the interference of electromagnetic waves can be effectively prevented, the stability of the whole power battery system is improved, the impact of broken stones can be effectively relieved when a vehicle runs through the energy absorption capability of the metal base plate, and the safety of the vehicle is improved by matching with the arrangement of the second buffer pad. A good buffering and fixing layer is formed at the bottom of the first buffering pad, so that the protection performance of the bottom of the tray is further improved, and the phenomenon that the chassis often collides with hard objects such as gravels on the road surface in the long-term running process of the new energy automobile is avoided; the broken stones are directly contacted with the tray 1 and are deformed or damaged, so that the protection performance of the power battery is reduced.

The invention discloses an intelligent following anti-falling device suitable for power transmission tower maintenance and a using method. The intelligent following anti-falling device comprises a motor driving part, a guide rail sliding block part, a differential mechanism and a sensor part. The invention has the following beneficial effects: an electric power overhaul worker does not need to continuously drag and move the safety rope fixing bayonet, and can automatically adjust whether to open the one-way self-locking function of the guide rail slide block according to the specific working state during overhaul; in addition, the limitation of the position of the self-locking device and the length of the safety rope on the activity space range of the electric power overhaul worker in high-altitude overhaul is further reduced, and the overhaul activity space is further expanded; in addition, the intelligent following anti-falling device effectively avoids distraction of the electric power maintainer due to frequent dragging of the safety rope fixing bayonet, and unnecessary physical power consumption of the electric power maintainer is reduced.

The lingual bracket comprises a bottom plate and a ligation wing which are connected, the bottom plate is of a T-shaped structure and is provided with a transverse section and a longitudinal section, an auxiliary pipe is machined on the surface of the transverse section, and the ligation wing is machined at the end of the longitudinal section. The utility model has the characteristics of unique conception, simple structure and convenience in bonding and positioning; the bracket bottom plate is of a T-shaped structure and can provide transverse and longitudinal references, the positioning direction sense is strong, and meanwhile, the narrowed longitudinal section can avoid interference of the edges of the two sides of teeth.

According to the freight car manned detection method provided by the invention, all targets such as freight cars and portraits in the to-be-recognized picture are found through target detection, the vehicle license plate of the target vehicle is recognized, and the image center point coordinate of each target is constructed; and solving and recording the distance between the central point of the target portrait and the central point of the target vehicle image in the to-be-recognized picture. Finding out an auxiliary judgment image associated with the to-be-recognized image, detecting targets such as a truck and a portrait for an auxiliary judgment image frame containing a target vehicle, and solving the distance between the target portrait in each frame of image and the central point of the target vehicle; and finally, calculating the distance between the portrait center in each frame and the central point of the truck, and if the distance error does not exceed a set threshold value, judging that someone moves along with the vehicle and the target vehicle has an illegal behavior that the carriage carries people.

The invention relates to the technical field of flow velocity detection, and discloses a flow velocity meter detection device, which comprises a base, a reservoir fixedly mounted on the upper surface of the base, a first water tank fixedly mounted on the upper surface of the base, a second water tank fixedly mounted on the upper surface of the base, and a first water pipe arranged in an inner cavity of the reservoir, according to the invention, the filtering assembly can adopt a simulation scene to detect the flow velocity of water in different water areas, can filter impurities in the water, and can rapidly adjust the height difference of the water level through the partition plate assembly, so that the device is suitable for simulating various scenes, avoids the interference of the external environment on the flow velocity of water flow, enables the detected data to be more accurate, and improves the detection precision. The height of the water level can be rapidly measured through the water level assembly, an alarm can be given out in time when the height of the water level changes, measurement personnel are reminded to conduct correction, and errors of detection data are avoided.

The present application discloses a method for drawing a map road based on vtk and point cloud, which relates to the field of autonomous driving, including: using vtk to obtain point cloud data of a road, and using an octree to perform spatial division on the point cloud data to obtain point cloud data after spatial division; performing coordinate transformation on the point cloud data after spatial division to align the z-axis of the point cloud coordinate system with the z-axis of the camera coordinate system; drawing a road reference line by interactively taking points on the screen according to the point cloud data after coordinate transformation; generating a road boundary and a center line according to the road reference line through geometric transformation; clustering and edge extraction of the point cloud within a preset range of the road boundary by using the DBSCAN algorithm, and smoothing by using a B-spline curve to obtain a final road boundary as a drawn map road; in view of the low efficiency of road drawing in the prior art, the present application improves the drawing efficiency.

The invention discloses an anti-cheating metering electronic scale, and relates to the technical field of weight metering, the anti-cheating metering electronic scale comprises a weighing platform assembly, the weighing platform assembly comprises a chassis, and the bottom of the chassis is provided with a mounting groove. According to the anti-cheating metering electronic scale, the receiving module can capture various wireless signals around, when a cheating remote controller attempts to change a weighing result around the metering electronic scale, the emitted signals are captured, the sampling module samples the signals, and the signals are transmitted to the receiving module. The matching module compares sampled signal information with pre-stored suspicion signal information, if the sampled signal information is matched with the pre-stored suspicion signal information, it is indicated that a remote control signal for cheating is possibly received, and the processing module shields the signal, so that the cheating signal can be prevented from interfering normal weighing data of the electronic scale, and the safety of the electronic scale is improved. The electronic scale ensures that the numerical value displayed by the electronic scale is real and accurate, and the alarm module sends out alarm information to remind a user of the interference of suspected cheating signals.

The utility model relates to the technical field of medical auxiliary appliance, in particular to a kind of adjusting tracheal puncture device of emergency department, it can make medical staff no longer occupy one hand to lift the mandible of patient, so it will not make medical staff arm feel sore, avoid causing the distraction of medical staff, so that medical staff can wholeheartedly carry out tracheal puncture to patient;Including base and bracket, bracket is set on base, the base includes two groups of movable mat and two groups of fixed plate, the left side of two groups of movable mat is equipped with arc avoiding groove, the right end of two groups of fixed plate is equipped with limit connecting groove, two groups of movable mat are respectively connected with two groups of fixed plate by the cooperation of connecting plate and limit connecting groove, and two groups of movable mat and two groups of fixed plate are mutually symmetrical, the upper and lower ends of movable mat are respectively aligned with the upper and lower ends of fixed plate, the bracket includes arc-shaped supporting plate, for supporting the mandible of patient.

The utility model relates to the technical field of measuring devices, in particular to a measuring device for civil engineering budget, which comprises a mounting leg, the top of the mounting leg is rotatably connected with a rotating seat, the top of the rotating seat is fixedly connected with a mounting frame, the inner wall of the mounting frame is rotatably connected with a measuring instrument, and a shielding mechanism is arranged in the mounting frame. A protection mechanism is arranged at the top of the measuring instrument, the shielding mechanism comprises a sliding rod, a telescopic button, a first reset spring and a shielding shed, the sliding rod is slidably connected to the inner wall of the mounting frame, the telescopic button is slidably connected to the inner wall of the sliding rod, and the first reset spring is fixedly connected to the surface of the sliding rod. The shielding shed is fixedly connected to the top of the sliding rod, it is prevented that rain and snow may affect the accuracy of a measuring instrument, for example, a sensor is interfered or reading is unstable, the shielding shed can provide a dry environment, the influence of rainwater on the measuring precision is reduced, and the working efficiency is improved.

The invention relates to the technical field of automobile part machining, in particular to automobile part machining and stamping integrated equipment which comprises a part machining base fixedly provided with a stamping support, and further comprises a reset torsion seat located on the part machining base and used for resetting the stamping support. An L-shaped linkage rod is rotationally mounted on the reset torsion seat, a driving notch is formed in the L-shaped linkage rod, and a first detection roller is further rotationally mounted on the L-shaped linkage rod; the safe stamping mechanism comprises a stamping driving assembly and a moving-out taking and placing assembly; according to the machining and stamping integrated equipment for the automobile parts, the accident occurrence probability can be reduced, workpieces can be conveniently and accurately placed, the stamping effect can be guaranteed, and therefore the part machining precision is improved.

The invention relates to a self-adaptive management method and system for a database plan cache, and the method comprises the steps: firstly judging whether the plan cache is hit or not after a database receives an SQL statement, and triggering a hard analysis generation plan and caching the plan when the plan cache is not hit; if the cache is hit, further judging whether a corresponding multi-execution plan exists or not; and when only a single execution plan exists, analyzing the relationship between the number distribution of execution tuples and the number of execution times by adopting an execution efficiency algorithm to dynamically judge whether the data is inclined. And when a plurality of execution plans exist, entering a multi-plan cache management stage, selecting the execution plans according to a matching result of the current binding variable predicate selection rate and the cache plan historical selection rate, and generating and caching a new plan when the matching fails. According to the method, the data skew is accurately identified by executing the efficiency algorithm, intelligent matching and multiplexing of plans are realized by means of a multi-plan cache management mechanism, and the overall performance of the database in a data skew scene is improved.

The utility model relates to municipal works pipe jacking construction technology field discloses a kind of folding linear pipe jacking line shape measuring devices, including clamping mechanism, folding ruler, adjustable target and the telescopic fixing mechanism for locking the included angle between clamping mechanism and folding ruler;The clamping mechanism is used to clamp the measuring device in the end of pipe wall two sides of construction pipe jacking;Folding ruler one end articulates clamping mechanism;Folding ruler is provided with recess along length direction, and folding ruler is divided into several short rulers, and short ruler is connected with hinge;Laser source and reflector are provided on the adjustable target, and adjustable target is embedded recess to form sliding connection;The telescopic fixing mechanism includes telescopic link and first fixed bolt.The utility model integrates clamping, extension, measurement, target and locking function in one, adapt to the narrow space limit of construction;The short ruler design of folding ruler meets different pipe diameter measurement demand;Telescopic link adjusts included angle, ensures that folding ruler is perpendicular to pipeline axis, reduces inclination error.

The invention relates to the technical field of vehicles, and provides a speed control method, device and equipment for a windscreen wiper and a storage medium, and the method comprises the steps that a first windscreen wiper speed correction value is obtained according to windscreen wiper driving resistance of a previous speed control period and windscreen wiper driving resistance of a current speed control period; according to the rainfall parameter of the previous speed control period and the rainfall parameter of the current speed control period, a second windscreen wiper speed correction value is obtained; according to the first target control speed and the actual control speed of the last control period, a third windscreen wiper speed correction value is obtained; according to the first windscreen wiper speed correction value, the second windscreen wiper speed correction value and the third windscreen wiper speed correction value, the first target control speed of the previous control period is corrected, and the first target control speed of the current control period is obtained; and controlling the speed of the windscreen wiper based on the first target control speed of the current control period. The problem that the visual field is poor due to the fact that rainwater on a windshield cannot be well removed can be solved.

The invention relates to a method (1) for the automatic longitudinal adjustment of a motor vehicle and to a corresponding assistance system and to a motor vehicle equipped with the assistance system or a corresponding arrangement. In the method (1), a display position for displaying the respective gap marking (4, 6) is determined by means of a head-up display on the basis of the position of the preceding vehicle (3) within a range in which the gap for longitudinal adjustment is set from the user side. According to a user input for setting the new gap after the change, the previous gap mark (4) and the new gap mark (6) are first displayed at the corresponding display position by means of the head-up display at the same time. When the longitudinal adjustment reaches a new gap, the head-up display is actuated in such a way that only a new gap mark (6) is displayed and the previous gap mark (4) is no longer displayed.

The embodiment of the invention relates to the technical field of vehicles, and discloses a pit identification method and device, and the method comprises the steps: obtaining the vertical speed information of the sprung mass and the vertical speed information of the unsprung mass of each wheel of a vehicle; determining speed characteristic information of each wheel according to the vertical speed information of the sprung mass and the vertical speed information of the unsprung mass of each wheel; and according to the speed characteristic information of each wheel, determining a pit identification result of the vehicle. By applying the technical scheme of the invention, the problem of poor accuracy of pit identification in the prior art can be solved.

The invention relates to the technical field of automobile antennas, and discloses an automobile antenna device, which comprises a bottom plate, and is characterized in that a hollow shell and an insertion plate are designed, so that the device can be fixed when a covering shell is inserted into the inner side of a limiting seat and an antenna circuit board is protected, and the covering shell cannot be separated from the inner side of the limiting seat when an expansion bolt is not taken out; the covering shell can be kept stable in severe environments such as vibration and impact when a vehicle runs at a high speed, the service life of the antenna is prolonged, after the insertion plate is inserted into the insertion groove of the hollow shell, the limiting strip covered with the damping pad is inserted into the limiting groove in the front end face of the insertion plate, the resistance between the insertion plate and the limiting strip on the inner side of the hollow shell can be increased, and the service life of the antenna is prolonged. In a high-vibration environment, resistance is increased to facilitate fixation of the covering shell, the insertion plate is prevented from shifting or loosening from the hollow shell due to vibration, and the problem that the covering shell can be easily separated from the inner side of the limiting seat is solved.

The invention provides a method for detecting free PEG in pegylated human erythropoietin, the free PEG is detected through high performance liquid chromatography, the high performance liquid chromatography detection method comprises the following steps: (1) preparing a mobile phase A and a mobile phase B, the mobile phase A is a 0.1% TFA-aqueous solution, and the mobile phase B is a 0.1% TFA-84% acetonitrile solution; (2) setting chromatographic conditions: carrying out gradient elution by using a C4 chromatographic column; the flow velocity of the mobile phase is 0.75-1.0 mL / min; the column temperature is 60-70 DEG C; the temperature of the sample chamber is 2-8 DEG C; and (3) detecting the sample to be detected.

The invention discloses a coal worker pneumoconiosis animal model dust inhalation scientific research teaching experiment device in the animal simulation experiment technical field, and the device comprises a box body and a life box, the life box is embedded in the upper part of the box body, the life box and the box body are connected through a weight scale, the life box comprises a life chamber and a dust raising chamber, and a separation plate is arranged between the life chamber and the dust raising chamber; a plurality of dust raising holes are formed in the partition plate, a living screen is laid at the bottom of the living chamber, wood chips are laid on the living screen, a first collecting opening is formed in the bottom wall of the living chamber below the living screen, and a dust raising assembly is fixedly connected to the interior of the dust raising chamber and used for simulating the biological activity dust raising condition; a quantitative supply assembly is fixedly connected to the upper part in the box body and is used for quantitatively spraying pulverized coal to the living box to simulate the working environment of coal workers. The device is novel and effective, flying dust caused by various factors is simulated in the flying dust chamber through the flying dust assembly, finally, the weight scale is used for weighing the weight change, the actual content of pulverized coal inhaled by mice is calculated, experimental errors are reduced, and the authenticity and reliability of experiments are improved.

This invention relates to the field of computer vision, specifically to a monitoring method based on cascaded target detection, comprising: acquiring a monitoring screen; recognizing the monitoring screen using a trained first YOLO model and cropping out target region images; recognizing each target region image using a trained second YOLO model and obtaining target information therein; and summarizing the target information to a host computer; the target information includes a region number, and the step of obtaining the region number includes: locating target character information in each target region image using a trained second YOLO model; recognizing the located target character information using OCR technology, and confirming the region number based on the recognition information; the step of summarizing the target information to a host computer includes: when any target region fails to be recognized within a preset time period, summarizing and transmitting the target information corresponding to that target region to the host computer; after successful transmission, restricting other target information carrying the region number of that target region from being uploaded again.

The invention relates to the technical field of air conditioners, and discloses a method for controlling an air conditioner which is installed in a target vehicle. The method comprises the following steps: acquiring first voice data in a target vehicle; analyzing the first voice data to obtain a first analysis result; and according to the first analysis result, the air conditioner is controlled to operate. In this way, when a driver drives the target vehicle, the air conditioner can be controlled to operate in a voice mode. A driver can be prevented from being distracted when driving the vehicle, and the driver can conveniently use the air conditioner additionally arranged in the vehicle. The invention further discloses a device for controlling the air conditioner, the air conditioner and a storage medium.

The present invention relates to an intelligent diagnosis method for underground working conditions based on big data analysis, which includes the following steps in sequence: A. Establishing a background analysis model for underground faults; B. Obtaining real-time vibration acceleration data of the oil pumping unit's polished rod; C. Sending the background analysis model and the real-time vibration acceleration data to a real-time identification module for comparison and diagnosis; D. Outputting the diagnosis result. Step A specifically includes: A1. Batch collection of effective vibration acceleration data of the oil pumping unit's polished rod; A2. Data transmission to the background and preprocessing; A3. Marking normal and fault vibration acceleration data respectively; A4. Extracting the root mean square energy of various types of vibration acceleration data; A5. Drawing a graph of the root mean square energy changing with time; A6. The graph is stored in a sample library and trained; A7. Outputting the parameters required by the real-time identification module. This method uses technologies such as artificial intelligence, the Internet of Things, signal processing, and big data to accurately judge underground working conditions and diagnose specific faults occurring underground.

The utility model relates to the technical field of automobile accessories, and discloses a shock absorber of a terminal sealing structure for an automobile, which comprises a shock absorber main body, the top end of the shock absorber main body is fixedly connected with a second connecting part, and the bottom end of the shock absorber main body is fixedly connected with a first connecting part. The top end of the shock absorber body is sleeved with a protection assembly for improving the sealing performance of the structure. Through the arrangement of the first external sleeve shell, the second external sleeve shell, the fixing base, the built-in groove, the mounting bolt, the containing groove, the reinforcing inner layer and the sealing rubber ring, foreign objects are effectively prevented from invading or being interfered by the external environment, the sealing performance of the interior of the shock absorber body is kept, the sealing rubber ring can be detached and replaced subsequently, and the service life of the shock absorber is prolonged. The problems that after a sealing part is installed, the overall structure is fixed, the sealing part cannot be rapidly detached and replaced after being damaged, and the follow-up detection and maintenance cost is high are solved.

This invention discloses a differential information forwarding method, comprising the following steps: S1, setting parameters; S2, receiving differential information to be forwarded from a host computer; S3, encoding and transmitting the received differential information according to the set parameters; in step S1, the parameters include channel, transmit power, and modulation mode, wherein the modulation mode includes LoRa mode and GFSK mode; when the modulation mode is LoRa mode, two frequency points are set on each channel, with an interval of at least 55MHz between each frequency point, and a differential information signal is transmitted once at each frequency point, with the two frequency points alternately transmitting data frames; when the modulation mode is GFSK mode, three frequency points are set on each channel, with an interval of at least 55MHz between each frequency point, and a differential information signal is transmitted once at each frequency point; this invention employs a dual-frequency or triple-frequency retransmission mechanism, enabling the receiver to avoid interference points as much as possible in the time and frequency domains, greatly improving the data packet transmission success rate and adapting to complex electromagnetic environments.

The utility model discloses a seismic sensor coupling structure, which comprises a tailstock arranged on the surface of a medium to be coupled and a sensor arranged on the tailstock, three supporting legs are uniformly distributed at the bottom of the tailstock, and the tip of each supporting leg is a linear or arc cutting edge. The three-foot tail cone structure is adopted, the appearance structure of the supporting foot is optimized, and each tail cone is replaced by a locally concentrated short straight line or arc cutting edge, so that the coupling rigidity function of the supporting foot is ensured, and meanwhile, the inadaptability of a single-point supporting foot to local unevenness is overcome.