45results about How to "Improve engineering realizability" patented technology

The invention relates to a dual-frequency dual-polarized feed assembly in a C frequency band. The transceiving 4 / 6GHz is divided into two frequency bands, a dual-frequency orthogonal modal coupler is utilized to couple 4GHz transmitting signals into signals in four paths, and the phase shift power division characteristic of a bridge power divider and the relationship of four ports of the bridge power divider are utilized to synthesize the signals in the four paths into laevorotatory signals in one path and dextrorotatory signals in one path skillfully; after receiving frequency band signals pass through the dual-frequency orthogonal modal coupler smoothly, the laevorotatory signals and the dextrorotatory signals are divided by a simple dual-circular polarizer, thus realizing the receivingbands and the transmitting bands; and two polarized frequencies in each band are polarized and multiplexed. The feed assembly is compact in the structure and realizes the strictly consistent direction of the receiving band and the transmitting band. An antenna has the high polarization isolation (more than or equal to 30dB) and antijamming capability in the C band, the influence of the passive intermodulation in the antenna is low, and the electromagnetic compatibility between the working frequency bands is good.

A high-orbit optical remote sensor vacuum hot test external heat flow simulation method comprises the steps of firstly determining solar radiation heat flow according to on-orbit solar absorptance of an optical remote sensor (3), secondarily arranging the optical remote sensor (3) in a vacuum environment simulation chamber (1), then determining a 'sun outage' time period by judging whether the solar radiation heat flow Q1 (t) absorbed by an optical system within a orbit period is 0 or not, determining the time period of the Q1 (t) unequal to 0 as the 'sun outage' time period, adopting a solar simulator (2) and electric heater combined simulation scheme to perform outer heat flow simulation, determining that the time period of the Q1 (t) equal to 0 is a 'non-sun outage' time period, and adopting an independent electric heater simulation scheme to perform outer heat flow simulation. The problem that an existing non-contact space optical remote sensor outer heat flow simulation method does not have a solar spectral energy spectrum characteristic and directionality is solved, energy distribution of solar spectrum of the remote sensor on orbit can be accurately simulated, simulation accuracy is high, and project realization is promoted.

The invention provides an underwater array scanning laser imaging device, said device comprising: a carrier (1), an electrical module (19) and an imaging module (18); said carrier (1) is the shell of the whole device, The electrical module (19) includes an illumination laser (15), a combined inertial navigation (16) and a control processing unit (17); each component of the electrical module (19) is fixed on both sides of the mounting plate (22), and is installed The plate (22) is fixed to the carrier (1); the imaging module (18) includes a pitch servo mechanism (5), a roll servo mechanism (6) and an optical imaging module (14), and the optical imaging module (14) comprises imaging lens (7), optical filter (8), gate imaging sensor (9) and illumination lens (10); The laser light that described illumination laser (15) emits is transmitted to Lighting lenses (10). The device of the invention has the characteristics of miniaturization and the ability to realize area array scanning under water.

The invention discloses a supercritical water-cooled reactor control rod loading method and structure. The method is to select a single or multiple adjacent control rod assemblies as an assembly, and fix the control rod assemblies on the assembly to a On the control rod driving mechanism of the platform, the lifting or lowering of the single or multiple control rod assemblies on the control rod driving mechanism is completed through the control rod driving mechanism; the structure includes the control rod assembly and the control rod drive on the supercritical water-cooled reactor pressure vessel mechanism, single or multiple adjacent control rod assemblies are fixed to the same control rod drive mechanism. The invention can reduce the design difficulty of the top cover of the pressure vessel of the supercritical water-cooled reactor, simplify the operation management program of the control rod assembly, and improve the economy, safety and engineering feasibility of the supercritical water-cooled reactor.

The invention discloses a supercritical water-cooled reactor based on a stacked fuel assembly, which includes a fuel assembly channel and a control rod assembly channel, both of which are in the shape of a regular hexagon or a square; the outer side of each control rod assembly channel Fuel assembly passages are arranged continuously along the circumference to form a unit assembly, and several unit assemblies are arranged in a staggered array to form a honeycomb core structure; fuel assemblies with different enrichment standards are arranged in the fuel assembly passages, and along the fuel assembly passages The enrichment of the fuel assembly gradually increases from bottom to top in the axial direction; the control rod assembly channel is used to install the control rod bundle. The present invention effectively solves the problems faced by supercritical water-cooled reactors, such as excessive changes in axial temperature and coolant density, and unbalanced distribution of neutron moderating capacity in the core, without introducing moderating water rods and multi-flow flow schemes. It significantly simplifies the fuel assembly and core layout scheme, and improves the engineering feasibility.

The invention provides a digital television single frequency network radio frequency adapter and a broadband network system thereof. The adapter comprises a programmable module, and a broadband radio-frequency signal FM is subjected to down-conversion filtering to acquire a broadband intermediate frequency signal IF1. IF1 is switched in an intermediate frequency gain control module to acquire a broadband intermediate frequency signal IF2 with constant signal power. A / D conversion is performed to acquire a digital signal DATA1, which is switched in the programmable module to form DATA2=DATA1+delta t according to set time delay. The IF2 is subjected to D / A conversion to become a broadband intermediate frequency signal IF3 having accordant frequency domain with the IF2 and delayed time domain, and then the IF3 is subjected to up-conversion filtering to acquire a delayed broadband radio-frequency signal. The broadband network system is provided with the single frequency network radio frequency adapter. A multipath audio / video program source is processed by a front-end information source processing module, a channel processing module and a small signal broadband synthesizer into a small signal broadband radio-frequency signal FM. A signal chain transmits to each node, the single frequency network radio frequency adapter of each node adjusts the signal time delay and each broadband transmitter amplifies and transmits the signal FM, so the stability and covering effect of the system are improved and the cost is lowered.

The invention relates to an infrared digital image processing method, in particular to an image block-based adaptive infrared image and video vertical stripe removal method. The purpose of the present invention is to solve the technical problems that the existing infrared vertical stripe removal method has a large amount of calculation, is not conducive to hardware implementation, or has residual vertical stripes and side effects of image edges. By obtaining the preprocessed image frame data, filter the image data, block the image before and after filtering, and use the one-dimensional noise feature distribution of each image block in the column direction to perform adaptive image edge evaluation to obtain vertical lines The amount of superimposed noise, and correct the median value in units of columns as the final amount of superimposed vertical noise of the column, and then use the final amount of superimposed vertical noise to eliminate vertical lines on the original image in units of columns. This method can suppress the marginal side effects brought by the traditional algorithm, the algorithm complexity is low, and it has high real-time performance and engineering realization.

The invention discloses a driven energy absorbing pulling / pressing both-way buffer capable of being repeatedly used, and belongs to the technical field of spaceflight equipment. The device is mainly composed of four parts including an outer barrel assembly, a middle barrel assembly, an inner barrel assembly and a pull barrel assembly, wherein the middle barrel assembly is coaxially arranged in theouter barrel assembly, the inner barrel assembly is coaxially arranged in the middle barrel assembly, and the pull barrel assembly is coaxially arranged on the periphery of the connecting position ofthe outer barrel assembly and the middle barrel assembly. According to the device, through an innovatively-designed aluminum honeycomb resetting mechanism, a mechanical spring resetting device and aratchet one-way locking device are combined with the pulling / pressing both-way buffer based on aluminum honeycomb crushing energy absorbing materials, and the advantages that a traditional driven energy absorbing both-way buffer is simple in structure, small in mass and high in reliability are sufficiently inherited; and the traditional pulling / pressing both-way buffer can be repeatedly used and can be used for repeatedly-used soft landing devices needed for multi-target deep space exploration tasks in future.

The invention discloses a satellite-borne terahertz ice cloud nadir detector system, which comprises an antenna and scanning subsystem, a multi-frequency-band terahertz receiving channel, a calibration subsystem, a data collecting and processing platform, a control power distribution system and control and signal processing equipment, wherein the antenna and scanning subsystem, the multi-frequency-band terahertz receiving channel, the calibration subsystem, the data collecting and processing platform and the control power distribution system are installed on a detection head part; the controland signal processing equipment is installed on a satellite platform; and the detection head part carries out conical scanning, and observation for a target, observation for a thermal calibration source body and observation for cold air are successively finished in a scanning process so as to realize the scanning imaging of ice cloud and the in-orbit two-point calibration of a detector. A receiving front end design scheme of an offset paraboloid reflector and a quasi-optics feed network is adopted, and conical scanning is carried out through a rotary antenna feeder system to realize the nadirobservation of ice water particles in cloud.