117results about How to "Clear direction" patented technology

A modified ball structure has a base, a transparent hard inner body, a light emission control module, a transparent rubbery intermediate body and a spherical transparent outer body. An accommodation room is disposed on the base for installing the light emission control module thereon. More than two fixing components are annularly disposed outside the accommodation room. The transparent rubbery intermediate body is a soft rubber with resilience and shock-absorbing effect, and sheathes the surface of the transparent hard inner body. The spherical transparent outer body is a plastic body with a low flying resistance coefficient, and sheathes the surface of the transparent rubbery intermediate body. A better performance of the ball can be thus accomplished through the design of the three-layered structure.

The invention relates to an unmanned aerial vehicle for traffic guidance and an application of the unmanned aerial vehicle. The unmanned aerial vehicle comprises a vehicle body, and the unmanned aerial vehicle further comprises a main camera group, an LED display screen and a loudspeaker, wherein the main camera group is arranged on the vehicle body and is used for collecting traffic condition data; the LED display screen is arranged in a belly position of the vehicle body, and is used for displaying traffic guidance commands obtained based on the traffic condition data; and the loudspeaker is arranged in the belly position of the vehicle body, and is used for broadcasting the traffic guidance commands obtained based on the traffic condition data. Compared with the prior art, the unmanned aerial vehicle disclosed by the invention has the advantages of being not subject to road conditions, and being flexible, accurate and rapid; the unmanned aerial vehicle can shoot pictures over an accident point, so that a full coverage of law enforcement is achieved, professionals can quickly determine a core accident point, shot pictures and shot videos can be delivered to the professionals at the first time, and in-time handling of traffic accidents can be guaranteed.

The embodiment of the invention provides an equipment positioning method, a grid map construction method and a mobile robot. The equipment positioning method comprises the following steps that: the laser data of a laser beam emitted by a mobile robot at the current moment are acquired; the first pose of the mobile robot at the current moment is determined, the first endpoint position of the tail end point of the laser beam in a first grid map is determined according to the laser data and the first pose, wherein the first grid map comprises obstacle grids where an obstacle boundary is located and the values of distances between peripheral grids within a preset range around each obstacle grid and the corresponding obstacle grid; and the first pose is updated according to the values of distances between the peripheral grids and the corresponding barrier grid and the relative positions of the first endpoint position and the corresponding nearest barrier grid. With the equipment positioningmethod, the grid map construction method and the mobile robot provided by the embodiment of the invention adopted, operation efficiency during equipment positioning can be improved.

The invention discloses a method for achieving optimal navigation. The method comprises the following steps: step A) inputting a starting point and an ending point in navigation software; step B) giving a shortest route, a fastest route and a most economic route, and selecting and locking one route as a planned route by a user; step C) if the navigation is finished midway, promoting by the navigation software; if the user follows the route, performing a step D); if the user does not follow the route, changing the navigation route without changing the planned route, and performing the step D);step D) reaching the ending point; step E) when a mileage of an actual driving route is better than the mileage of the planned route, performing a step F); step E') comparing the mileage of the actualdriving route of the user with the mileage of the actual driving route of other people with the same starting point and ending point, giving a ranking, and performing the step F); F) storing an optimal route by a server. The method provided by the invention enables the user to know own direction more clearly, know travel efficiency of own trip, and optimize the route continuously by using the planned route as a reference.

The invention discloses an enhanced 10kV overhead insulated wire partial discharge inspection device and an inspection method. The device comprises an ultrasonic sensor, an ultrahigh frequency antennasensor, an ultrasonic amplification filter circuit, an ultrahigh frequency amplification filter circuit, a detection circuit, a dual-channel A/ D converter, an ARM microprocessor and a memory card. The device mainly aims at the problems of poor anti-interference capability and low efficiency of a single ultrasonic detection device, the ultrahigh frequency antenna sensor is additionally arranged,and overhead wire partial discharge detection is realized in two detection modes of ultrasonic and electric signals. Meanwhile, the ultrasonic and ultrahigh frequency detection information is utilized, so that common electromagnetic interference and ultrasonic interference can be avoided, and the anti-noise capability of the system is improved. In addition, according to the arrival time differenceof the ultrasonic and ultrahigh frequency pulse signals, the distance between the defect position and the detection point can be obtained, a new reference is provided for defect positioning, and thedefect searching efficiency is improved.

A small, lightweight, portable message strip kit includes an elongated flexible band carrying a battery, electrical circuit, programmable computer chip and signaling device for alerting the user to perform a recommended activity at certain time intervals during various physical endeavors. The strip carries a program key for the computer chip to select the time intervals for the initiation of the signals. The kit has a chart relating user size, and physical endeavor to frequency of the signal for operation of the program key.

The present invention relates to a wind power T-type connection line ground fault setting method. The method comprises the following steps: 1) extracting the zero-sequence voltage and the zero-sequence current at the wind power T-type connection line protection installation position, and solving the simulation impedance and the signaling threshold value of a sender according to system parameters; 2) calculating the power direction of each side, and determining the fault direction; and 3) if the faults are the positive direction faults, determining whether blocking signals are received or not, and if the blocking signals are received, determining that faults are the external faults of the T-type connection line, and protecting the closed lock; and if the closed locking signals are not received, determining that the faults are the internal faults of the T-type connection line, and immediately performing the tripping operation. The wind power T-type connection line ground fault setting method can effectively avoid the influence of the T-type connection line topology and the wind power fault features on the T-type connection line protection configuration and considers the economy so as to ensure the selectivity, the sensitivity and the reliability of the T-type connection line protection.

The invention relates to a single-phase overlapping sequence setting method for reducing a power frequency fault component distance protection misoperation rate in an AC-DC system, belonging to the electric power system protection technical field. The method employs a symmetrical component method to calculate the positive sequence and negative voltage and current at two ports, employs a superposition principle to respectively calculate the positive sequence, negative sequence, zero sequence voltage and current fault component of each node according to the voltage of each node, three sequence voltages of the two ports, and the positive sequence, negative sequence and zero sequence voltage fault component of the two ports, and calculates the three-phase voltage and current fault component of each node according to the symmetrical component method. The method calculates the measurement impedance of each distance protection power frequency fault component based on each phase voltage, current phase fault component and fault point voltage before faults. Accordingly, the measurement impedance of each protection power frequency fault component under two reclosing sequences is calculated, and an overlapping sequence corresponding to the greater measurement impedance of a power frequency fault component is selected as an optimized overlapping scheme. A lot of results show that the method has good effects.

This invention relates to high voltage output circuit fault distance protection technique and to one self-adapting earth resistance relay, which forms the relay by fault protection fixing place negative voltage Um2 as electrode volume. This invention relay not only has strong transition resistance force and also with negative sequence volume protection integrated with good self-adapting relay.

The invention provides a throughput forecast-based global optimization relay node selection method. At an initial distribution stage, one-hop users and two-hop users are distinguished according to downlink path loss values of the users; the resource is initially distributed into two parts by a base station according to proportions occupied by the one-hop users and the two-hop users. Idle users in a communication range of the two-hop users are incorporated into an alternative relay set by the two-hop users; link information is reported to the base station by all alternative relay nodes; resource blocks distributed by access links and return links are set to be variables by the base station; the proper relay node is selected by each two-hop user by the throughput forecast-based global optimization relay node selection algorithm, so the overall throughput is the maximum. The throughput of the system is more intuitively and effectively improved, rational utilization of the resource is realized from an overall aspect in combination with a Hungarian algorithm, the resource waste caused by a bottleneck effect can be actively avoided, and the communication quality is greatly improved.

The invention discloses a high-efficient permanent magnet gathering type guide rail mechanism suitable for a high-temperature superconductive maglev system. The guide rail mechanism comprises a permanent magnet contraposition combination formed by a plurality of permanent magnets and a permanent magnet guiding combination formed by a plurality of permanent magnets. The guide rail mechanism is characterized in that the permanent magnet contraposition combination produces high magnetic pressure by utilizing mutual repulsion effect among poles of various permanent magnets, the permanent magnet guiding combination guides and diffuses magnetic energy of the permanent magnet contraposition combination and the permanent magnet guiding combination to an upper surface and an upper area of a permanent magnet guide rail for the using of high-temperature superconductive bulks by utilizing magnetization directivity of the permanent magnets. By the aid of the high-efficient permanent magnet gathering type guide rail mechanism, a shortage of low magnetic energy utilization efficiency caused by using ferromagnetic materials to guide magnetic path by an existing permanent magnet guide rail mechanism for the high-temperature superconductive maglev system is overcome, on the basis of magnetic field indexes guaranteed to meet the requirements of the maglev system, utilization efficiency of energy storage of the permanent magnet guide rail can be effectively improved, and meanwhile, the high-efficient permanent magnet gathering type guide rail mechanism is favorable for enhancing the overall performance of the high-temperature superconductive maglev system from aspects of magnetic field construction and magnetic energy distribution.

The invention discloses a wireless sensor network system under an emergency environment, which comprises a monitoring center (also called as an upper computer) and an assorted server as well as a wireless sensor network, wherein the structure of the network is designed as a whole, the model selection requirements on each mode at the node are provided, a proper MAC (Media Access Control) protocol and a routing protocol are selected and designed, and an access mechanism of a mobile node and an interest effective communication path decision rule in a routing process are provided, so that a wireless sensor network monitoring system is quickly deployed in a disaster occurrence region to monitor all kinds of environmental indexes in real time and grasp the trend of the disaster, and thus the efficiency and the quality for emergency rescue are effectively improved.

The invention provides a waiting time relaxation based conflict resolution method. The waiting time relaxation based conflict resolution method comprises adjusting the waiting time length of the furnace number before the process which can be waited for through iterative relaxation to completely resolve the equipment conflict; ranking the beginning time of the furnace numbers in the converter process according to the time ascending order to obtain a beginning time sequence, setting an initial value of the waiting time of the furnace numbers in the buffering process to be zero and serving the furnace number which is corresponding to the last datum as the current furnace number; judging whether the equipment conflict occurs between the current furnace number and the closely previous furnace number in the converter process or not, serving the corresponding furnace number of the previous datum of the beginning time of the current furnace number as the new current furnace number and continuing if not and computing the equipment conflict time, checking the assigned waiting time of the closely previous furnace number in the buffering process after the converter process, computing the waiting time margin and adjusting the waiting time through the iterative relaxation to resolve the equipment conflict if yes. According to the waiting time relaxation based conflict resolution method and optimization scheduling method, the requirements of the optimization scheduling scheme under the busy and complex work conditions can be well met and the production efficiency of a converter steel mill is improved.

Disclosed is an HMI (human machine interface) control method which is simple in menu setting and button designing, smooth in operation, free of repeatedly compiling page switching procedures and convenient to expand. The method includes: setting an HMI; defining attributes of buttons of menu hierarchies; defining attributes of pages; performing menu selection and page switching; performing page controlling. Menu hierarchies, the buttons and the pages of the whole interface are set, and separate layers are set for the menu buttons; then serial numbers of menu options and serial numbers of the pages of the buttons are realized by respectively defining the attributes corresponding to the buttons and the attributes of the pages of the menu hierarchies, the distribution mode of the attributes of the buttons forms a tree-form distribution pattern, laying out and positioning search are facilitated, and meanwhile, the space is reserved, which is convenient for subsequent pages and menus to expand. The method has the advantages that naming of the attributes of the buttons and the pages, the distribution pattern of the menu hierarchies and intelligent switching of the pages are of high practicality.

The invention discloses a quick-drying type epoxy primer and a preparation method thereof. The quick-drying type epoxy primer comprises the following components in parts by weight: 30-40 parts of epoxy resin, 0.2-1 part of leveling agent, 4-6 parts of anti-settling agent, 0.1-0.5 part of dispersant, 45-55 parts of pigment and filler, and 1-3 parts of drier. According to the technical scheme of the invention, all the performance indexes of the paint film of the primer completely reach or even exceed the indexes of commercial epoxy primers. At the same time, the quick-drying type epoxy primer is strong in versatility, and the paint film of the primer is quick to dry. Therefore, the coating period is greatly shortened.

Example systems and methods involving a construction template system are described. An example system includes a laser and a template. The laser is configured to indicate target points on a surface, such as a floor or wall of a building. Each of the target points is a predetermined location uploaded to the laser. The template includes target alignment points that correspond to the target points indicated by the laser. Furthermore, the template also includes a reference location. In examples, the reference location provides indicia of construction features as part of a building construction site. The template is adhered to the surface after aligning the target alignment points of the template with the corresponding target points.

The invention discloses a system for transmitting sewer pipeline data based on a wireless sensor. The wireless sensor system comprises a conveying pipeline, a plurality of wireless sensor nodes arranged on a sewer pipeline, and an aggregation node; each wireless sensor node comprises a sensor module, a processor module and a power supply management module, wherein the sensor module of each wireless sensor node is integrated with a communication interface of a temperature sensor, a communication interface of a humidity sensor, a communication interface of a distributed optical fiber sensor, a communication interface of a force strain gauge, a communication interface of a pressure sensor, a communication interface of a flow sensor and a communication interface of an ultrasonic sensor. According to the embodiment of the invention, a corresponding monitoring means is provided for pipeline water quality monitoring, automatic acquisition is realized, and convenience is brought to a terminalmonitoring user to realize data acquisition, troubleshooting and the like.

The invention discloses a single-ended ultra-high-speed protection method for an AC line at an inversion side of an AC-DC hybrid system, and the method comprises the following steps: performing phase-mode conversion of the voltage and current of a local single end respectively to obtain two corresponding line moduli delta(ualpha), delta(ubeta) and delta(ialpha), delta(ibeta); calculating the mathematical morphological gradient of the current line modulus delta(ialpha) and delta(ibeta), solving the morphological gradient modulus maximum values of the line modulus, comparing the larger one witha starting threshold value, and if the larger one is greater than the starting threshold value, starting protection; distinguishing fault directions through employing time domain energy of line modulus reverse traveling waves, and discriminating internal faults and external faults in the area through employing the characteristic that characteristic frequency components and high-frequency components are remarkably attenuated by newly-added primary equipment of an inverter station, and starting the protection when the faults exist in the area. Only the voltage and the current of the local singleend are utilized, opposite end data are obtained without a communication channel, the rapidity and the reliability are superior to those of longitudinal protection, and an effective guarantee is provided for safe and stable operation of the AC-DC hybrid system.