30results about How to "Simple working mode" patented technology

The invention discloses a high-speed axisymmetric aircraft composite control method. The high-speed axisymmetric aircraft composite control method is used for solving the technical problem of poor stability in an existing interceptor missile direct force and aerodynamic force composite control method. According to the technical scheme, a varying centroid and pneumatic rudder composite control are adopted, based on defining a varying centroid control mode, an instruct allocation strategy under a composite control scheme is formulated; a dynamical model for control is established through force analysis of a high-speed aircraft; an overall scheme of a varying centroid mechanism is further determined; then ballistic characteristic points are taken to finish design of a control system. According to the high-speed axisymmetric aircraft composite control method, the varying centroid mechanism is introduced, so that the technical problem of poor stability of a background technology control method is effectively avoided, larger control torque is obtained while energy consumption is reduced as much as possible, and reentry flight of the high-speed aircraft for a long time in a large airspace is facilitated; a composite mode with the pneumatic rudder is adopted, so that work pattern of a sliding block executing mechanism is simplified, and system stability is improved.

The invention discloses an estimation method for a high-canopy-density forest stand volume based on a photographic image pair of an unmanned aerial vehicle. According to the invention, a small lithium-battery unmanned aerial vehicle is used as a flight control platform and carries an ordinary non-metric fixed-focus digital camera, so a photogrammetric measurement system is composed. According to different textural feature information of tree crowns, aerial photographs are automatically judged, read, analyzed and interpreted by combined usage of a computer vision technology and an image recognition technology; therefore, stand description factors like average tree height h, average diameter D, tree density N, canopy degree K1, mingling degree K2, age class A and locality class S are obtained, and the forest stand volume M is calculated via a model.

The invention discloses a symmetrical double-feet driving offresonance piezoelectric linear motor, comprising a stator, a casing of the stator, a mover guide rail, guiding adjusting mechanisms, a precompression apparatus and a base. The stator is fixedly connected in the casing to form an integrity; the front end of the casing is provided with the mover guide rail, the rear end is in connection with the precompression apparatus, and left and right ends are respectively in connection with the guiding adjusting mechanisms; the precompression apparatus is internally provided with a precompression spring; under the restoring force effect generated by the deformation of the precompression spring, the front end of the casing keeps contact with the mover guide rail; the mover guide rail, the precompression apparatus, and the guiding adjusting mechanisms are all arranged on the base; the stator is composed of a stator supporting board, and two symmetrical driving feet, lamination electroceramics, cushion blocks, long hinges, and pre-tightening screws. The symmetrical motor has a structure simple, is convenient to install, and effectively guarantees the bidirectional actuation performance consistency of a piezoelectric motor; certain electric signals are respectively applied to four sets of lamination electroceramics to realize the bidirectional rectilinear motion of the piezoelectric motor.

The invention discloses a threshold adaptation energy detection method. In the energy detection method, a parameter computing scheme for an offline energy judgment threshold decision function and an online energy judgment threshold judgment scheme are sequentially realized. In the threshold adaptation energy detection method provided by the invention, the energy judgment threshold decision function is offline established, a value of an energy judgment threshold is dynamically regulated according to different signal to noise ratios, and online judgment is performed, so the intellectualization level of a cognitive radio user is improved, false alarm probability Pf(xi) is decreased to maximize the average data transmission rate of a secondary user (SU), energy overhead required in a running process is decreased, and an average value of false dismissal probability Pm(xi) is limited within a preset probability threshold range to avoid excessive interference in a primary user (PU).

The invention provides a method and system for opening a door by scanning a code, a smart cabinet and a terminal. The method for opening the door by scanning the code is used for the smart cabinet andcomprises the steps of S102, detecting the type of the two-dimensional code or the barcode scanned by a scanner and a cabinet number corresponding to the code; S104, judging whether or not the two-dimensional code or the barcode belongs to item storage codes in type, and if yes, executing S106; S106, sending out a door opening signal to open the cabinet door corresponding to the cabinet number, and executing S108; S108, judging whether or not the cabinet door is opened, if yes, executing S110, and if not, executing S112; S110, uploading item storage information to a server so that the servercan push the item storage information to the user terminal; S112, uploading fault information to the server, redistributing the cabinet door, and executing S108. By means of the method for opening thedoor by scanning the code, the scanner is applied to multiple links, and the hardware utilization efficiency and the user experience are improved.

The invention discloses a mobile terminal achieving short distance wireless pairing by using a touch screen, and relates to the field of communication. The mobile terminal comprises a touch panel, a CPU controller and a radio frequency transceiver; the signal input end of the radio frequency transceiver is connected with the touch panel; the CPU controller is connected with the driving end of the radio frequency transceiver and used for driving the radio frequency transceiver to transmit and receive radio frequency signals, and the radio frequency transceiver radiates the signals through the touch panel; the CPU controller is connected with the signal output end of the touch panel. According to the mobile terminal, when the touch panel is in an antenna transmitting state and a sensor network is used for sensing contact with other mobile devices, the radio frequency transceiver is used for receiving the radio frequency signals, connection is built by receiving an identification address, a wifi or Bluetooth mode is started up, data transmission is conducted, the working mode is simple, easy to understand and particularly suitable for users who are not familiar with digital products, and the purpose of conveniently and rapidly conducting data transmission between the mobile devices is achieved.

The invention relates to a mobile phone wireless charging system with a Bluetooth function controlled by APP. The mobile phone wireless charging system comprises a wireless transmitter, a wireless receiver and a mobile phone, wherein the wireless transmitter consists of a DC filtering circuit, a transmitting control circuit, a transmitting coil assembly, a Bluetooth module circuit, an electronic switching circuit and a switch filtering circuit; the wireless receiver consists of a receiving coil assembly, a receiving control circuit and a filtering output circuit; the mobile phone comprises charging control management software which is formed by an APP charging special application program and a mobile phone internal Bluetooth functional program. When the mobile phone wireless charging system is in use, the wireless transmitter is arranged in a public place in a mobile phone public charging facility form; the wireless receiver is placed in a mobile phone back shell; the mobile phone downloads and installs the APP charging special application program from the internet; the APP charging special application program controls a mobile phone blue band and the Bluetooth in the wireless transmitter to perform data communication to control mobile phone charging; a user scans a two-dimensional code on the wireless charging transmitter by the mobile phone and then pays to control charging automatically; and the mobile phone wireless charging system is simple in structure, creative in working pattern and quite high in practicability.

The invention discloses a secondary side parallel LCD forward converter capable of avoiding the reverse charging of an energy storage capacitor. The forward converter comprises a forward converter main circuit and an energy transfer and transmission circuit; the forward converter main circuit comprises a high-frequency transformer T, a switching tube S, a diode D1, a diode D2, an inductor L1 and acapacitor C1, and the energy transfer and transmission circuit comprises a diode D3, a capacitor C2, an inductor L2 and a diode D4. The forward converter is simple in circuit structure and high in reliability, the diode D4 ensures that C2 cannot be reversely charged, reactive power loss of the converter is reduced, the reverse recovery problem of the D4 can be eliminated, diode loss is reduced, excitation energy can be transferred to a load side, forward excitation energy can be transmitted, energy transmission efficiency is improved, and the circuit is suitable for high-power transmission.

The invention provides a full-automatic cleaning machine for a vacuum moisture regain turnover box. The full-automatic cleaning machine comprises a three-station transferring platform, a negative-pressure purging system and a cleaning system; the three-station transferring platform comprises a receiving station, a sweeping station and a cleaning station which are arranged in sequence, and the three-station transferring platform is driven by a transverse transferring module to switch positions on the three stations; the negative-pressure purging system is arranged above the cleaning station; the cleaning system is arranged above the cleaning station; and a peripheral enclosure assembly comprises an annular track and three faces of enclosures, a water retaining lifting door is arranged between the sweeping station and the cleaning station, and the peripheral high-temperature and high-pressure water spray head set walks on the annular track through a power device and is vertically arranged. The full-automatic cleaning machine for the vacuum moisture regain turnover box has the advantages of being high in cleaning efficiency, high in cleaning degree, free of manual participation and high in automation degree.

The invention discloses a DC/DC converter circuit topological structure. On the basis of different working modes of a coupling inductor in the working process of the topological structure, the charging and discharging of a bootstrap capacitor and the leakage inductance energy recycling of a converter, the high-voltage gain of the converter is achieved, meanwhile, the loss of the converter is reduced, and the efficiency of the converter is improved. In addition, the topological structure of the invention is simple in circuit structure, adopts a small number of used components, has a single working mode, is low in device voltage stress and is suitable for a boost converter system between the output side of a fuel cell and standard direct-current bus voltage.

The invention relates to the technical field of intelligent decision, and discloses an information recommendation method and device, a medium and electronic equipment. The method comprises the steps of obtaining a first keyword table which is configured for each data analysis model in a data analysis system and stores a first keyword; obtaining descriptive statements about analysis requirements ofthe decision-making subject on the decision-making object; performing word segmentation processing on the descriptive statement to obtain a second keyword table in which a second keyword is stored; and determining matching scores of the first keywords and the second keywords corresponding to the data analysis models based on the second keywords in the second keyword table, and recommending the data analysis models according to the matching scores. According to the method, the data analysis model is matched according to the descriptive statement of the analysis requirement of the decision-making subject for the decision-making object, the time for manually selecting the model can be shortened, and the working efficiency is improved. And the matching precision can be improved, so that the analysis result of the decision-making object is optimized.

The invention relates to the technical field of photoelectric detection, and in relates particular to a photoelectric searching and tracking device based on an avalanche diode imaging device. The device comprises a photoelectric turret (1) and a display control processing module (2); the photoelectric turret (1) adopts an avalanche diode imaging device and is used for searching or tracking a target under the control of the display control processing module (2) and sending an acquired video image and target position information to the display control processing module (2); and the display control processing module (2) is used for controlling the photoelectric turret (1) to switch between a search mode and a tracking mode, and processing and displaying the video image and the target position information acquired by the photoelectric turret (1). The searching and tracking device is simple in structure and light in weight, image motion compensation generated in the scanning direction and the platform motion can be achieved at the same time, the working mode is simplified, and the requirement for the anti-vibration capacity of the platform is lowered.

The invention discloses a nitrogen and oxygen detection sensor chip. The sensor chip is formed by laminating four layers of substrates, the four layers of substrates sequentially comprise a first layer of substrate, a second layer of substrate, a third layer of substrate and a fourth layer of substrate from bottom to top, and the four layers of substrates are all made of zirconium oxide; a snakelike heating electrode is printed on the surface of the first-layer substrate; an insulating layer covering the heating electrode is printed at the bottom of the second-layer substrate, and a capacitance electrode (+) is printed at a top test end; the third-layer substrate sequentially comprises a first diffusion barrier, a first cavity, a second diffusion barrier and a second cavity; a capacitance electrode (-) is printed at a position, corresponding to the first cavity, of the bottom of the fourth-layer substrate, and a test electrode (-) is printed at a position, corresponding to the second cavity, of the bottom of the fourth-layer substrate; a test electrode (+) is printed on the top of the fourth layer of substrate, and the top of the test electrode (+) is covered with a porous protective layer. According to the invention, the structure of the nitrogen-oxygen detection sensor chip is simplified, the test loop is optimized, and the use of noble metal Au is avoided.

The invention provides a method for realizing a pilot frequency wireless relay. A downlink processing unit and a monitoring unit are arranged in a relay device, and the method comprises the following steps: enabling the downlink processing unit to receive a first radio frequency signal RF1 from a base station (CAP) and convert the first radio frequency signal RF1 into an intermediate frequency signal; converting the intermediate frequency signal into a second radio frequency signal RF2, and transmitting the second radio frequency signal RF2 to a user terminal (STA); enabling the monitoring unit to receive a fifth radio frequency signal RF5 from a base station (CAP) and convert the RF5 signal into an intermediate frequency signal; processing and analyzing the intermediate frequency signal to obtain a working frequency and a signal bandwidth required by the relay; and setting a second radio frequency signal RF2 according to the working frequency and the signal bandwidth indication. By adopting the wireless relay method and device provided by the invention, the working frequency band can be changed, namely the same-frequency and different-frequency relay operation is supported, the time delay characteristic is low, the anti-interference performance is realized, the working mode is simple, and a certain multi-frequency-band mesh function is realized. A transmitting channel and a receiving channel in the invention are not realized by adopting conventional LNA and PA, but a radio frequency transceiver is added, so that flexible choices are provided for the relay device to work at the same frequency or different frequencies with a base station.