63results about How to "The technical principle is simple" patented technology

The invention discloses a method and a device for detecting the icing thickness of a power transmission line. According to the method and the device, the advantages of morphology in image edge detection are utilized, and filtration and CB morphology edge processing are carried out on collected power transmission line icing images, so that noises are filtered out, meanwhile the edge information of the images can be accurately and effectively detected, and the calculation of the icing thickness of the power transmission line is realized. The technology is simple in principle, is visual and practicable, reliable in detection, and is not influenced by the transducer sensitivity and a selected mechanical model, so that beneficial efforts of morphologically measuring the icing thickness are performed, and a new detection technology is provided for the safe and stable operation of the power transmission line.

The invention discloses a preparation method of a titanium dioxide-tin dioxide nano-sosoloid material. The preparation method comprises the following steps: enabling a soluble tin (IV) salt, citric acid and a titanium (IV) salt to react in ethylene glycol till the a transparent precursor sol is formed; enabling the precursor sol to perform a closed reaction for 6-20 hours in a reaction kettle at the temperature of 150-220 DEG C; and washing and drying a reaction product. According to the preparation method disclosed by the invention, hydro-thermal treatment is directly performed on the precursor sol obtained by a sol-gel method, rutile type nano-tin dioxide-titanium dioxide (Ti1-xSnxO2, x is not less than 0.15 and less than 1) sosoloid material with the different titanium-tin weight ratio can be directly prepared without high-temperature sintering, the average particle size is 9-11nm, the particle size distribution is uniform, the specific surface area is large, the photocatalytic ability or the gas-sensing property can be improved, the agglomeration of nano-particles caused by sintering can be avoided, and the process energy consumption can also be effectively reduced; and furthermore, the technical principle is simple, the operation is simple and convenient, and the requirements on equipment are low.

The invention discloses a detection method and a device for a wind deflection angle of a suspension type composite insulator chain. By means of the detection method and the device for the wind deflection angle of the suspension type composite insulator chain, an image of the suspension type composite insulator chain is analyzed and tracked, the wind deflection angle is obtained, and problems that the existing wind deflection angle of the suspension type composite insulator chain is low in computing accuracy and prone to influence of parameters of an external environment are solved. Besides, the technique is simple in principle, intuitive, feasible, reliable in detection and capable of making beneficial attempt of measuring the wind deflection angle of the insulator chain from the point of feature matching, so a novel detecting technique is supplied for safe and stable operation of an electric transmission line.

The invention discloses an active cooling process for machine tools. A cooling system utilizing the active cooling process mainly comprises a controller, a frequency converter, a pump and a flow rate monitor. Parameters such as rotational speed of workpieces, actual power of machine tool spindles, or rotational speed of tools and feed rate during operation of the machine tools are input by the controller in an automatic extracting or by-hand input manner, and by treatment of the cooling system utilizing the active cooling process, supply of cooling liquid can keep dynamically balanced with a running state of the machine tools on the premise of meeting cooling requirements of operations of the machine tools, so that the purpose of reducing energy consumption of the machine tools is achieved. By the active cooling process of the machine tools, the machine tools are cooled effectively, energy utilization rate is increased, and energy saving effect is remarkable.

The invention relates to a vibration-type wind power generation system. A conventional rotating wind turbine generator is not friendly to biology and environment, gets close to the limit of wind power utilization rate, is complex in structure, and is high in manufacture and maintenance cost. The system consists of a vibration generator, a damping fin group, an elastic supporting structure body, a piezoelectric material module, a synthetic fiber rope, and a spring damping stabilizer. The system is characterized in that the vibration generator is a hollow housing; the damping fin group is fixed on an inner wall surface of the vibration generator; the elastic supporting structure body is located below the vibration generator, and is used for supporting the vibration generator; the piezoelectric material module fastens and wraps the outer wall surface of the elastic supporting structure body; the upper end of the synthetic fiber rope is fixed on the vibration generator, and the lower end of the synthetic fiber rope is connected with the spring damping stabilizer; moreover, there is a certain length allowance. The system prevents a rotating wind turbine from affecting the biology and environment, is high in wind power utilization rate, is simple in implementation, and is suitable to be used in a populated region.

The invention relates to a power circuit which can generate an output voltage approaching to zero and an adjustment method thereof. The power circuit comprises a voltage stabilizer, a divider circuit and a gain circuitry; the voltage stabilizer comprises an input terminal, an output terminal and an adjustment terminal, wherein, the input terminal receives an input voltage and the output terminal outputs an output voltage; the divider circuit which is coupled between the output terminal and the ground and uses the output outage to generate a divider voltage; the gain circuitry which is coupled between the adjustment terminal and the divider voltage for receiving the divider voltage generated by the divider circuit to adjust a gain of the output voltage corresponding to a reference voltage. With the invention adopted, the output voltage of the power circuit can be adjusted to be close to zero. The power circuit which can generate the output voltage approaching to zero and the adjustment method thereof have simple technical principle, can be applied to a plurality of reduction voltage stabilizers and provide great convenience, thereby improving the industry greatly.

The invention provides a soft switching system of Internet of Things and a method thereof, and belongs to the field of Internet of Things technology. The system comprises a perception layer device or bus, an access system, a network soft switching system, a soft switching service and management system, a standardization information format, and a mobile service management terminal or a PC service management terminal. According to the invention, complexity of a perception layer in the network accessing stage is separated and shielded. On this basis, transportation and switching technology which can be standardized and suitable for Internet of Things are introduced, so problems of complexity and high accessing cost of the perception layer devices of Internet of Things in accessing stages are solved. Processing methods of identifying, distinguishing, addressing, transporting and information switching based on Internet network layer information are also introduced, so a highly practical and economical solution is provided for standardization and large-scale application of Internet of Things in network layer. According to the invention, technical cost is low, cost performance is high and the system is high in university and compatibility and large in access capacity.

The invention discloses a self-adaptive step length estimation method based on a pedestrian motion state. The method comprises the following steps: S1, an accelerometer arranged in the intelligent terminal collecting acceleration data and magnetometer data of pedestrians in the moving process; S2, preprocessing data; S3, dividing the period of data; S4, detecting the maximum value and the minimumvalue of the acceleration of each step of the pedestrian, and simultaneously calculating the walking frequency and the acceleration variance of each step of the pedestrian; S5, identifying the motionstate of each step of the pedestrian by the extracted features through a classifier; and S6, estimating the step length of the pedestrian by adopting a proper step length parameter according to the motion state identification result of the classifier. According to the method, a new nonlinear step length model is established to estimate the step length of the pedestrian, and the step length estimation precision is improved. Step length parameters of different motion states of the pedestrian are fitted through a least square method, and proper step length parameters are selected according to themotion state identification result of the classifier, so that the step length estimation model can adapt to different motion states of the pedestrian.

The invention provides a CAD (Computer-Aided Design) arbitrary multi-segment line batch rapid splicing method. The method comprises the following steps: step 1, reading multi-segment lines to be spliced, selecting and reading XY coordinates and Z elevations of vertexes on straight lines, the multi-segment lines, two-dimensional multi-segment lines and three-dimensional multi-segment lines in batch; step 2, checking, deleting duplication and marking the read multi-segment lines; 3, cyclically traversing the head end point and the tail end point of any multi-segment line to be spliced, sequentially searching the head end point and the tail end point of the nearest spliced multi-segment line with the same attribute from the end point Z, and marking the head end point and the tail end point; 4, according to the spliced multi-segment line, the nearest multi-segment line to be spliced and the head and tail end points of the nearest multi-segment line to be spliced, automatically judging whether a sequential or reverse splicing mode is adopted or not, and splicing and marking; and step 5, repeating the steps 3 and 4 in sequence to complete splicing, and drawing the spliced multi-segment lines based on the attributes of the original multi-segment lines. The method is simple in technical principle and easy to operate, has great superiority compared with methods in the prior art, and isworthy of popularization and application in a large number of CAD engineering drawings in the future.

The embodiment of the invention provides an image-based verification code implementation method and device. Malicious machine accessing can be effectively prevented, and implementation is easy and operation is easy and convenient. The image-based verification code implementation method comprises the steps that the first number of forward images of which the direction is identifiable are randomly extracted from an image library, and the second number of images are randomly selected from all the extracted forward images to be rotated; the first number of images are spliced into two-dimensional matrix verification images, and position relation information of the rotated images is correspondingly recorded; when a verification request is received, one spliced two-dimensional matrix verification image and the position relation information of the rotated images are acquired; the two-dimensional matrix verification image is returned to a client side to be displayed; and the position relation information of the clicked image of the user in the two-dimensional matrix verification image transmitted by the client side is received and compared with the position relation information of the rotated images, and whether verification of the user is passed is judged according to the comparison result.

This invention discloses a method for setting up address analysis protocol list and network devices, in which, the method includes: A, setting up an address analysis protocol image list of an asynchronous transmission mode network and getting corresponding permanent virtual connection information based on the address analysis protocol message, B, registering said connection information in said list, in which, users can see directly that which PVC does the ARP mapping list learn from, so that users can master the information between the ARP mapping list and the PVC accurately.

The invention relates to a method for judging the insulation state of medium-high voltage cables through metal sheath circulating current. A complete circulating current analysis model is establishedfor the metal sheath circulating current, abnormal causes of the metal sheath circulating current are analyzed, targeted prevention measures are proposed, and the method has a significant meaning forreliable operation of high voltage cables. According to the method, a capacitive current calculation model and an induced current calculation model are established, input parameters of the models canbe obtained by directly measuring parameters of the cables and are substituted into the models for calculation, and the insulation state of the medium-high voltage cables is judged according to a calculation result. The technical principle is simple and efficient, complicated devices are not needed during implementation, the implementation cost is low, and convenience is provided for implementation and popularization.

The invention provides a road network control method based on controllability and importance, and belongs to the technical field of traffic control, and the method comprises the steps of selecting any local road network from the whole road network of a whole city, and building a weighted directed network model for the local network; sorting the edges and the nodes in the weighted directed network model respectively by using an edge importance sorting algorithm and a node importance sorting algorithm; constructing a key road network and a standard road network according to a sorting result; obtaining a condition that the node state and the edge state are controllable at the same time; implementing traffic flow input management and control of the key road network according to traffic flow state information which is monitored and fed back by each road section and each intersection in the key road network; and summarizing traffic flow state information which is monitored and fed back by all road sections and intersections of each local road network of the whole city, and implementing traffic flow input management and control of the whole city. According to the invention, the overhead cost of road network control is reduced, the data processing amount is suddenly reduced, the data processing difficulty is reduced, and the control response speed is accelerated.

The invention provides a signal transmission zipper based anti-theft pre-warning system. The signal transmission zipper based anti-theft pre-warning system comprises a power supply, a circuit switch, a warning module and a signal transmission zipper; the power supply provides power for the warning module; the warning module comprises a controller, a bag and suitcase container built-in loudspeaker, a mobile client, an electric shock anti-theft module and vibration equipment. The stated method uses low-cost materials to form, the purchase cost and the maintenance cost are both relatively low, the technical principle is simple, the anti-theft effect is obvious, the technical purpose is fulfilled by modifying the common zipper by printing a conductive coating, the modifying cost is low, the system can be conveniently put into production, and the anti-theft technique is suitable for wider environments.

In order to lower the requirements of online detection technologies on objective factors, reduce the structural complexity and cost of detection equipment, improve the accuracy of detection on high-humidity or semi-volatile micro-nano aerosols and efficiently obtain micro-nano aerosol particle samples, the invention provides a wet type ultraviolet-absorption-method online detection device for micro-nano aerosol. Through the implementation of the invention, the wet type ultraviolet-absorption-method online detection device has the advantages that the effective online detection on high-temperature, high-humidity or semi-volatile micro-nano aerosols can be realized; in view of that ultraviolet absorption detection has characteristic detection wavelength, detection aiming at production dust can be effectively carried out without interference from other sources of dust; the on-site sampling of the micro-nano aerosol can be realized, so that the further detection on the physical and chemical properties of the aerosol is facilitated; the online detection cost of the micro-nano aerosol can be effectively reduced.

The invention provides a preparation method of a Ni-based catalyst with adjustable selectivity/non-selectivity. The functional monomer adopted in the preparation method is a functional monomer which contains long molecular chain segments and is used for constructing a molecular chain segment mobility mechanism. According to the method, a substrate and an active component precursor are dissolved in dimethyl sulfoxide, the functional monomer, a cross-linking agent and an initiator are added after ultrasonic dispersion and matching, then nitrogen is introduced into the solution for deoxygenation, the solution is sealed and then put under an ultraviolet lamp for illumination to initiate polymerization, and a catalyst precursor is formed; Ni ions in the catalyst precursor is reduced by sodium borohydride, the obtained product is cleaned repeatedly with water after the printed substrate of the product is eluted with ethyl alcohol and acetic acid, vacuum drying is carried out, and the Ni-based catalyst with adjustable selectivity/non-selectivity is obtained and can be used for fractional reduction of a nitryl isomer and preparation of o-phenylenediamine. The preparation method has the advantages that the technical principle is simple, raw materials are easy to obtain, operation is convenient, and preparation is easy.