7results about How to "Expand effective coverage" patented technology

The invention provides an airborne dual-frequency dual-antenna ultrashort wave communication system, an airborne system works at a first frequency and a second frequency, and a ground station is configured to work at the first frequency. Comprising the steps that a first ultra-short wave communication link and a second ultra-short wave communication link transmit signals at a first frequency or a second frequency according to control and receive radio frequency signals at the first frequency and the second frequency at the same time; the digital signal processing module is used for acquiring a radio frequency signal received by the ultra-short wave communication link and demodulating the radio frequency signal to obtain received voice or data; and determining an optimal link communicating with the ground station according to the ground station information and the aircraft inertial navigation information, and controlling the link to transmit the radio frequency signal at the first frequency and the other link to transmit the radio frequency signal at the second frequency. According to the invention, channel resources do not need to be additionally increased during receiving, the effective coverage range of a transmitting airspace is improved, an adaptive transmitting strategy is provided, a ground station does not need to be modified, and high-reliability communication in air-to-air and air-to-ground multi-task scenes is ensured.

The utility model relates to air conditioning technical field provides an air conditioner indoor unit and air conditioner, indoor unit includes: shell, the shell has the air outlet, fixed part is located the position of the shell is located air outlet downside, air deflector is configured as movably placed below air outlet to block air outlet downward air outlet, wherein: air deflector is connected with connecting piece, and through connecting piece quick release is installed on fixed part, the utility model discloses air conditioner indoor unit, through setting fixed part at the bottom of shell, air deflector quick release is connected in fixed part through connecting piece, makes air deflector to be located below air outlet, blocks air outlet directly downward air blowing, can realize the function of preventing straight blowing, low structure cost, can also quickly and conveniently remove air deflector when not using, and after air deflector removal, fixed part is located at the bottom of shell, its structure is not easy to be perceived, and air conditioner indoor unit appearance is beautiful, improves user experience.

The utility model relates to ancient building fire extinguishing device technical field especially for a kind of ancient building concealed type spray fire extinguishing device, including decoration component, water supply component and spray component, the inside of decoration component is equipped with water supply component, water supply component includes the limit shell in the upper side groove of mounting seat and is fixedly connected with mounting seat, the inside front half portion of limit shell is rotatably connected with click shaft, in the utility model, through the shunt box, water delivery box, shunt pipe, spray pipe, spray nozzle being set, the device can be rotated shunt box cooperation water delivery box and carry out water delivery, water is shunted by rotatable spray pipe cooperation shunt pipe, spray nozzle is carried out and is sprayed to extinguish fire, simultaneously by rotatable shunt pipe driving spray pipe and spray nozzle rotation, to carry out greater range of spray fire extinguishing, the spray structure of the device has greater adjustment range, has better fire extinguishing effect and greater effective coverage.

The invention relates to the field of unmanned aerial vehicle interference, in particular to an unmanned aerial vehicle interference method and device, a countering gun and a storage medium, and the unmanned aerial vehicle interference method comprises the steps: obtaining an interference parameter corresponding to a target unmanned aerial vehicle, and the interference parameter is determined according to an unmanned aerial vehicle communication signal; generating a first OFDM interference signal according to the interference parameter; generating a target sweep frequency signal according to the first OFDM interference signal and a preset noise signal, the target sweep frequency signal covering all working frequency points of the unmanned aerial vehicle communication signal; and performing signal interference on the target unmanned aerial vehicle based on the target sweep frequency signal. According to the method, the effective interference signal can be generated according to the interference parameter of the target unmanned aerial vehicle, so that the communication link of the target unmanned aerial vehicle can be efficiently and accurately interfered.

The utility model relates to the technical field of VOCs treatment, and discloses a movable VOCs treatment machine which comprises a vehicle body, the front side surface of the vehicle body is fixedly connected with a storage box, the upper surface of the vehicle body is fixedly connected with a hose communicated with the interior of the vehicle body, and the end, away from the vehicle body, of the hose is fixedly provided with an air suction hood. A lifting plate is slidably connected to the interior of the storage box, a supporting shaft is rotatably connected to the upper surface of the lifting plate, a connecting piece is arranged between the supporting shaft and the air suction cover, and swing of the air suction cover is achieved through cooperation of the supporting shaft, a rotating shaft, a gear, a toothed plate, a reciprocating lead screw, a reciprocating lead screw sleeve, a first motor and other structures; therefore, a larger area can be covered, dead angles caused by dispersion of pollution sources are reduced, VOCs gas can be more comprehensively collected, the treatment efficiency is improved, and the effective coverage range is remarkably expanded.

The present invention discloses an intelligent metasurface integrating signal reflection, refraction, amplification and energy collection and its application. The intelligent metasurface can simultaneously support the reflection, refraction, amplification and energy collection of wireless signals on one surface, so as to achieve the purpose of amplifying the reflected / refracted signals through the collected energy, thereby enhancing the effective coverage of the wireless signal. When the signal model of MF-RIS constructed by the present invention is applied to a multi-user wireless network, with the goal of maximizing the sum rate of multiple users in an orthogonal multiple access network assisted by MF-RIS, a non-convex optimization problem for jointly designing the base station transmit beamforming, the operation modes and parameters of different components of MF-RIS and their deployment locations is constructed, and then an iterative optimization algorithm is designed to effectively solve the aforementioned non-convex optimization problem, thereby maximizing the sum rate of multiple users.