31results about How to "Reduce structural design requirements" patented technology

This invention discloses a stator internal gas-inducing efficient anti-surge steady expansion device of a multi-stage axial compressor composed of a stator, a gas-suction groove, a gas-inducing pipe and a gas-collecting chamber, in which the stator is stator blade in the multi-stage axial compressor, the groove, one or many, is placed in a region adjacent to flow separation existing on the surface of the stator suction face, the gas inducing pipe is in the stator blade and a ventilation pipe connecting suction pipes, the collecting chamber is set outside of the runner box and collects gas flows induced by the gas-inducing pipe after the suction groove absorbs small low energy gas flows, and the suction groove absorbs fluids of low energy on the surface of the stator suction side and transports them to the chamber and discharges them out of the system after mixed press.

The invention discloses an electrical property prediction method of an offset reflector antenna based on an electromechanical coupling model. The electrical property prediction method comprises the steps of: 1) establishing an antenna finite element model in I-DEAS; 2) analyzing in the I-DEAS to obtain the temperature distribution of each node of the finite element model of the offset reflector antenna; 3) reading a finite element model file in an Ansys file and computing structural deformation caused by temperature; 4) computing items of influence caused by reflector errors and feed source errors of the offset reflector antenna to aperture field amplitude-phase of the antenna; 5) computing the electrical property of the offset reflector antenna; and 6) judging whether design requirements are satisfied. The electrical property prediction method of the offset reflector antenna based on the electromechanical coupling model has the advantages that the influence of temperature on the structure of the offset reflector antenna can be accurately analyzed and the structural field and electromagnetic field coupling analysis of the offset reflector antenna is realized; and the influence of various structural errors to the working performance of the antenna is analyzed, the major structural factors can be found out, the reasonable requirement on structural precision can be given out according to actual demands, the development cycle is shortened and the development cost is reduced.

The invention relates to an intelligent manipulator, a bidirectional walking mechanism thereof and a full-automatic intelligent vending device, wherein the intelligent manipulator comprises a mountingsupport; a rotary base seat is arranged at the lower part of the mounting support; the mounting support can slide back and forth along the axial direction of the rotary base seat; the manipulators which can move towards or away from each other to clamp or loosen goods are arranged on the mounting support; the manipulators are positioned above the rotary base seat; and a goods supporting table forloading the goods is arranged on the rotary base seat. The invention aims to provide the intelligent manipulator, the bidirectional walking mechanism thereof and the full-automatic intelligent vending device which are arranged outside a vending machine, are convenient to mount and maintain, and have high goods picking efficiency.

The invention discloses an end cover and first-stage integral recovery low-cost second-stage low-orbit carrier rocket which comprises a first-stage rocket body, a rocket sleeve cover and a second-stage rocket body, wherein the rocket sleeve cover comprises a barrel cover, an end cover shell section and an end cover, the barrel cover is arranged at the front end of the first-stage rocket body, and the barrel cover is used for containing the second-stage rocket body; the bottom of the barrel cover is provided with an adaptive support used for installing a second-stage rocket body, the inner wall of the barrel cover is provided with a sliding rail combination, the sliding rail combination is connected with the second-stage rocket body in a sliding fit mode, the front end of the second-stage rocket body is provided with a satellite adaptive support, and a satellite load is installed on the satellite adaptive support; the end cover is composed of a plurality of petals hinged to an end cover shell section, the multi-petal end cover is in a hemisphere shape after being folded, and opening and closing of the end cover are controlled through an end cover actuator; and a reverse thrust rocket is further arranged at the front end of the inner wall of the end cover shell section. According to the end cover and the first-stage overall recovery low-cost second-stage low-orbit carrier rocket, 100% overall recovery can be achieved, repeated use can be achieved after detection and evaluation, and the reuse value is higher.

The invention discloses a non-coupling multi-dimensional force sensor overload protection method and device. According to the method, on the basis of the position changes between a support end and a loading end of a multi-dimensional force sensor under different loads, overload protection is carried out by limiting a position change threshold between the support side and the loading end of the multi-dimensional force sensor. The device comprises a sleeve shell and a first limiting plate; the first limiting plate is fixedly connected with a loading platform of an elastomer of the multi-dimensional force sensor; protruding columns and grooves that cooperate with each other are arranged at the first limiting plate and the elastomer of the multi-dimensional force sensor respectively; hole shaft clearances are formed between the protruding columns and the grooves; and an axial gap is formed between the surrounding edge of the top surface of the first limiting plate and the bottom surface ofthe support frame of the multi-dimensional force sensor. With the overload protection device, overload capabilities of the multi-dimensional force sensor in all directions can be adjusted independently and the accurate force/torque overload protection can be realized.

The invention relates to the technical field of gas storage containers, and provides a power module, a carrier and a safety management method of the power module. The power module comprises at least one gas storage cylinder group. Each gas storage cylinder group comprises gas storage cylinders and a connecting assembly, wherein the gas storage cylinder group is provided with at least two gas storage cylinders. The gas storage cylindersin each gas storage cylinder group communicate with one another through the connecting assemblies, and the gas storage cylinder groups and/or the gas storage cylinders are arranged and combined according to a preset mode. The carrier comprises a carrier body and the power module. Compared with the prior art, the power module and the carrier with the power module have the advantages that by reducing the diameter of each single gas storage cylinder element and matching the configuration mode of the space in a passenger car, the requirement of the gas storage cylinders for the structural design of a car body is greatly reduced, and the space utilization rate is increased; and the design and forming process difficulty of a fiber laying layer can be reduced, the use amount of the carbon fibers can be reduced to a certain extent, and the gas storage density of the gas storage cylinders is reduced.

The invention provides a television voice camera control system and method, and the method comprises the steps: collecting a key control signal input by a user, detecting the real-time working state of a voice camera, and outputting a control signal according to key control information and the real-time working state, thereby outputting a working voltage to the voice camera or cutting off the working voltage of the voice camera. According to the technical scheme, the power-on or power-off of the voice camera can be controlled according to the power-on control signal and the power-off control signal input by the user, so that the privacy security of the user is protected, and the user experience can be improved; meanwhile, compared with the prior art that the power-on and power-off can be controlled only by directly pulling out the wire, the technical scheme of the invention has the advantage of simple and reasonable operation.

The invention discloses an underwater target positioning method based on second-order interference. The second-order interference theory of optical measurement is applied to underwater acoustic field detection to perform underwater target positioning; The order correlation function searches for the phase (time) delay of the sound source signal relative to the array element, and obtains the difference of the absolute linear distance between the sound source and the two array elements. For a multi-element array, the position of the sound source can be quickly and accurately searched by calculating the product of multiple second-order correlation functions. The positioning method of the present invention is not limited to "the distance between the array elements of the sensor array needs to meet the requirement of 1/2 wavelength", which greatly reduces the requirements for array design and processing; and the output signal-to-noise ratio of a single sensor array element in the present invention is far less than 1 It still shows good positioning ability, which is beneficial to the detection and positioning of long-distance targets. Therefore, the present invention has important application value for the underwater target positioning detection of the underwater acoustic sensor array.

The invention belongs to the field of control panels of instrument control systems and main control rooms in nuclear power plants, and particularly relates to a physical isolation device and method for a control panel of a nuclear power plant. The device comprises an external wire inlet cable, a wiring terminal set, a closed metal wire groove, a metal hose a, a metal hose b, an isolation keel and panel surface equipment, wherein the external wire inlet cable is connected with the wire inlet end of the wiring terminal set, the wire outlet end of the wiring terminal set is respectively connected with the closed metal wire groove and the metal hose a, the closed metal wire groove is connected with the metal hose b, the metal hose a and the metal hose b are connected with one end of the isolation keel, and the other end of the isolation keel is connected with the panel surface equipment. According to the physical isolation device, by means of the keel and a detachable metal plate, installation space is saved, the problem that a traditional isolation device is difficult in engineering installation is solved, the structural design requirement for a panel body is reduced, the machining and manufacturing period of the panel body can be shortened, and implementation cost is saved.

The invention relates to a wavelength selecting switch with a gravity acceleration sensor and a control method. The wavelength selecting switch is provided with an optical system, a switching attenuation unit, a switching attenuation control unit, a gravity acceleration sensor and a microprocessor, which are arranged in a main body, wherein the switching attenuation control unit is connected with the switching attenuation unit; a signal input end of the microprocessor is connected with the gravity acceleration sensor; and a signal output end of the microprocessor is connected with the signal input end of the switching attenuation control unit. The method comprises the following steps: sending a signal to the microprocessor by the gravity acceleration sensor; treating, storing, comparing and judging the signal by the microprocessor and outputting acceleration values after being changed in all directions; and controlling the switching attenuation unit by the switching attenuation control unit according to the received values. The wavelength selecting switch provided by the invention is simple in structure, low in cost and easily realized. The wavelength selecting switch can be applied to any optical communication device which is similar to the wavelength selecting switch, has a built-in switching attenuation unit and is based on a free space platform optical system. The problem of related index change, such as insertion loss, and the like, caused by different placing states or running states, is efficiently solved by using the wavelength selecting switch.