10results about How to "Guaranteed frequency" patented technology

The utility model discloses a graphene oxide cake material crushing device, and relates to the technical field of graphene oxide processing, the graphene oxide cake material comprises a feed hopper used for crushing the graphene oxide cake material, the feed hopper is provided with two supporting wallboards which are symmetrically arranged, and the longitudinal section of each supporting wallboard is in an L shape; the two ends of the two supporting wallboards are each fixedly provided with an end plate. The number of the material crushing rollers used for crushing the graphene oxide cakes is two, and each material crushing roller is provided with a driving shaft rod and a crushing blade; a plurality of crushing blades are arranged, the plurality of crushing blades are uniformly arranged in an array along the axis direction of the driving shaft rod, and the two groups of mutually engaged crushing blades can quickly roll a large cake material into the blade group, so that the speed of the graphene oxide cake material crushing device is increased; according to the utility model, after graphene oxide cakes are shredded into blocks, dispersion treatment or drying treatment is carried out, and the dispersion time or the drying time is obviously shortened.

A method and system for collecting pedestrian motion data based on hybrid rendering renders a pre-set traffic scene from a virtual engine onto a virtual reality headset. Subjects then perform a series of human-vehicle interaction behaviors and reactions based on the images displayed on the headset. Motion capture devices record these behaviors and reactions while simultaneously driving a virtual character within the rendering engine, completing a series of data acquisition processes within the rendering engine. This invention fully combines the convenience of scene creation, data acquisition, coordinate system calibration, and time synchronization of a rendering engine simulator with the richness and realism of human movement and reactions in the real world. It captures and redirects the reactions and movements of real pedestrians based on the virtual scene in the rendering engine to a virtual character within the rendering engine, and then collects and records multi-view, multi-modal data within the rendering engine.

The utility model discloses an old man turning-over device relates to medical auxiliary instrument technical field, including frame body part, control part and lifting part, replace manual heavy physical operation: device relies on the drive motor of control part, screw rod and abutment plate cooperation, through motor drive screw rod rotation, drive abutment plate to lift to promote first side plate, second side plate rotation around pivot, realize the mechanical lifting of old man body position and turn over, replace traditional manual auxiliary turning-over's heavy physical labor. Without nursing staff consuming physical strength to move or lift the old man, solve the problem of nursing staff fatigue caused by frequent turning over at night, reduce the work burden of long-term nursing, adapt to the scene of family lack of professional nursing staff.

The utility model relates to the technical field of photoelectricity, in particular to a photoelectric conversion circuit for an omnidirectional photoelectric receiver. Comprising a multi-stage signal amplification circuit, a signal filtering and interference source processing module, a pulse level output circuit and a power supply unit module, the multi-stage signal amplification circuit is used for amplifying the current signal and converting the current signal into a voltage signal with a symmetrical waveform; the signal filtering and interference source processing module is used for carrying out de-noising processing on the voltage signal in the photoelectric conversion circuit; the pulse level output circuit adopts a hysteresis comparator circuit design and is used for converting the voltage signal into a digital pulse signal; the power supply unit module comprises a single-power-supply low-ripple power supply unit and a reference voltage source unit, the single-power-supply low-ripple power supply unit is used for providing power for the photoelectric conversion circuit, and the reference voltage source unit is used for providing output limiting level. The photoelectric conversion circuit provided by the utility model can effectively adapt to an omnidirectional photoelectric receiver, and realizes a high-speed photoelectric conversion function.

The present invention relates to the technical field of electrical components, and in particular to a precision frequency adjustment switch of a digital walkie-talkie, comprising a hexagonal clamping part installed on a walkie-talkie body, wherein a circular limiting part is fixedly installed on the top and bottom of the hexagonal clamping part, and a hexagonal rotating column is rotatably connected to the circular limiting part. At an emergency rescue site, rescuers use a fixed-frequency walkie-talkie for communication and coordination. If the frequency modulation switch knob is accidentally touched to change the frequency, communication interruption may occur, affecting rescue efficiency and even endangering life safety. The fixed knob can ensure that the device always operates at the set frequency and ensure the stability of the communication link. Accidentally touching the frequency modulation switch knob to change the frequency may cause the device to enter other frequency bands in use, thereby causing signal interference. On the one hand, it interferes with the normal communication of other devices, and on the other hand, it may also receive unnecessary signals, affecting the quality of normal communication.

The present invention relates to the technical field of microwave technology, and relates to a switching system based on signal low frequency, which also includes a code modulation component for code element rate correction arranged at intervals in the channel, and the code modulation component includes a primary correction unit for transmission rate adjustment, a secondary correction unit and a tertiary correction unit for code element number adaptive adjustment. The code modulation component can effectively improve the regulation of the code element number, and can timely adjust the code element rate, etc., thereby ensuring the frequency of the signal and ultimately reducing the distortion probability of the signal.

The present invention relates to the technical field of carbonyl iron powder, and discloses a device and a method for preparing carbonyl iron powder, wherein the device for preparing carbonyl iron powder comprises a grinding part, wherein the grinding part comprises a base, wherein the base is rotatably connected to a cylinder through a first bearing seat and a second bearing seat arranged on the upper surface thereof, and an end of the cylinder close to the second bearing seat is designed to be open. The device and the method for preparing carbonyl iron powder can effectively solve the problem that when a ball mill is used to prepare flaky carbonyl iron powder in the prior art, the production loading amount of different batches is different, while the ratio of raw materials to grinding balls in the ball mill is rated unchanged, and when the loading amount in the ball mill is too small, the impact force is insufficient and the ball milling time is prolonged; when the loading amount in the ball mill is too large, the distance between the grinding balls is too close, resulting in over-grinding, generating unnecessary fine particles or agglomerates, thereby affecting the particle size and yield of the carbonyl iron powder.

This invention belongs to the field of photovoltaic power generation control technology and discloses a method for partitioning distributed photovoltaic clusters in a regional distribution network. It calculates the electrical distance between nodes based on a frequency-active power sensitivity matrix and obtains the electrical distance matrix. An optimized initial centroid is obtained using the PSO algorithm. Based on the initial centroid, the K-means algorithm is applied to perform cluster analysis on the nodes of the distribution network, completing the cluster partitioning of energy storage nodes. Using energy storage nodes as centroids, the remaining photovoltaic nodes without energy storage and load nodes are further partitioned into clusters. A comprehensive performance index is obtained by weighting three indicators: active power balance, energy storage balance, and modularity. The partitioning scheme with the highest comprehensive performance index is considered the optimal cluster partitioning. This invention uses the energy storage area as the center to partition distribution areas containing distributed photovoltaics into clusters, providing necessary inertia and frequency support for the power grid.

The invention discloses an aluminum alloy swing laser-vibration-hot wire synergistic efficient additive manufacturing method, and belongs to the technical field of laser fuse wire additive manufacturing. The method comprises the steps that an oxidation film and oil stains on the surface of a substrate are removed; starting the swinging laser-vibration-collaborative material adding equipment, adjusting the angles and positions of a laser device and a wire feeding head, and setting material adding parameters; the base plate is fixed, the robot is programmed, a walking route of the additive heat source is set, and the robot is moved to the initial position; a wire heating device is started to preheat the welding wire; an additive heat source and a protective gas switch are turned on, and additive manufacturing is conducted according to the programming track; after a layer of additive wall is completed, surface oxides of the additive wall are cleaned, the programming track of the robot is reset, and after the additive wall is cooled, the next layer of additive is started; and after manufacturing of the additive wall is completed, the swing laser-vibration-hot wire synergistic additive equipment is shut down. The forming precision of the additive wall can be improved.

The embodiment of the invention provides a frequency selection method and device for short-wave communication, computer equipment and a medium, and the method comprises the following steps: determining a main frequency selection interval according to the optimal working frequency FOT of a current link, a link reliability threshold and a frequency availability threshold; according to the fact that the probability density function is continuous and the integral of the probability density function is 1, a first weight # imgabs0 #, a first probability density function, a second weight # imgabs1 #, a second probability density function, a third weight # imgabs2 # and a third probability density function are obtained through calculation; and according to the first probability density function, the second probability density function and the third probability density function, obtaining the pre-selected frequency of this time, and taking the center frequency point corresponding to the channel number closest to the pre-selected frequency as the frequency point of the short-wave communication frequency selection of this time. According to the scheme, frequency selection is carried out through double constraint conditions of link reliability and frequency availability, the safety of frequency use is improved, and the link reliability and the frequency availability of the selected frequency can be ensured.