69results about How to "Size advantage" patented technology

An intraoperative probe system for preferentially detecting beta radiation over gamma radiation emitted from a radiopharmaceutical is described. In one embodiment, the probe system of the present invention is a probe having an ion-implanted silicon charged-particle detector for generating an electrical signal in response to received beta particles. In such an embodiment, a preamplifier may be located in close proximity to the detector filters and amplifies the electrical signal. Furthermore, a wire may be used to couple the probe to a processing unit for amplifying and filtering the electrical signal, and a counter may be utilized to analyze the resulting electrical signal to determine the number of beta particles being received by the detector. Alternatively, the wire can be replaced with an infrared or radio transmitter and receiver for wireless operation of the probe.

The invention aims to realize that a control mode of primary side feedback is added into an asymmetric half bridge type flyback converter in a non-complementary DCM mode. For the asymmetric half bridge type flyback converter working in the non-complementary DCM mode, primary side inductance is released and is not clamped by an output end at the moment of finishing primary side excitation energy resetting. At the time, the primary side inductance, resonant capacitance, leakage inductance, and parasitic capacitance between the drain and the source of an MOS transistor start resonance oscillation; and at the moment of oscillation starting, a voltage between the drain and the source of the MOS transistor forms an "inflection point", voltages on two ends of the primary side inductance reflect voltage changes of the output end, voltages ontwo ends of an auxiliary winding have similar changes, an oscillation starting direction is just opposite to the direction of the voltages on the two ends of the primary side inductance due to a dotted terminal winding relationship, and if the inflection point is detected through the auxiliary winding and inflection point information is transmitted to a controller, the detection and control of an output voltage can be realized. Compared with the prior art, relatively high output voltage precision, linear adjustment rate and load adjustment rate of the converter can be ensured; and meanwhile, zero voltage switching (ZVS) of a primary side switch tube can be realized, the working frequency of the converter can be increased, the efficiency of the converter can be improved, and the volume of a complete machine is reduced.

This invention provides an indoor positioning system and method based on virtual Beidou satellite navigation signals. The system is based on the hardware of the existing Beidou satellite navigation ground receiving equipment, transmits virtual Beidou satellite navigation signals through message retransmission equipment installed inside or outside a building, and provides highly reliable indoor positioning service for the existing Beidou satellite navigation ground receiving equipment. The system comprises a control section, a space section and a user section, wherein the control section comprises a server and a wireless communication module; the server is connected with the wireless communication module through a standard serial interface; the server is butted with the space section through the wireless communication module; the space section comprises a plurality of message retransmission equipment for generating virtual Beidou satellite navigation signals; the user section comprises a mobile hand-held terminal or a vehicle terminal and is connected with the server through the Internet or a wireless public network.

The present invention discloses a microwave photonic broadband radar imaging chip, and belongs to the integrated microwave photonic technology field. According to the present invention, by a photonicIntegration technology, the emission end and the reception end of a microwave photonic broadband imaging radar are integrated in the same chip, the chip is integrated with the following photonic assemblies of a semiconductor laser, a first 1*2 optical coupler, a Mach-Zehnder modulator, an optical attenuator, an optical phase shifter, a 2*1 optical coupler, a second 1*2 optical coupler, an emissionend photoelectric detector, a phase modulator and a reception end photoelectric detector, and the photonic assemblies are connected via the optical waveguides. The present invention also discloses amicrowave photonic broadband radar imaging system. According to the present invention, a high-frequency broadband linear frequency modulation emission signal of the broadband imaging radar can be generated in the optical domain, and an echo can be demodulated to an intermediate frequency or a base band by utilizing a microwave photonic frequency mixing technology, so that the real-time processingof the high-resolution target imaging can be realized. The microwave photonic broadband radar imaging chip and the microwave photonic broadband radar imaging system of the present invention have theadvantages of being small in size, high in integration degree, good in stability and low in cost, etc.

The invention discloses a soft human-simulated finger and a preparing method thereof. One end of the soft human-simulated finger is a finger tail end (5A), and the other end of the soft human-simulated finger is a finger root (5B); an airflow guide pipe (2) is mounted on the finger root (5B), and after a strain limiting layer (30) is spliced on a bottom face board of a hollow base body (3), clockwise and anticlockwise winding lines are wound around the hollow base body to form a fiber enveloping layer (4); and an outer skin layer (1) is formed in an injection molding manner. An air bag (3A) is arranged in the middle portion of the hollow base body (3), and is filled with gas or liquid with a certain pressure, and therefore the soft human-simulated finger deforms. The material young's model of the designed soft human-simulated finger is 250 kPa, the hardness of the soft human-simulated finger approximates to the hardness of human body skin, maximum bending displacement of the single soft human-simulated finger can reach 100 mm, and the output force can reach 4 N.

The invention discloses a microwave frequency measurement chip as well as an applying method and a preparing method thereof. The microwave frequency measurement chip comprises an optical grating coupler, a phase modulator, a filter based on a micro-ring resonant cavity and a bus waveguide. An optical signal is coupled by a coupling optical grating and enters the chip, an optical carrier signal is transmitted in the bus waveguide and first passes the phase modulator, the optical carrier signal is modulated by an unknown microwave signal to be measured through an intensity modulator, the modulated signal enters the micro-ring resonant cavity through the bus waveguide, two paths of optical power are respectively output at the upper and lower speech path ends of the filter, and the unknown microwave signal can be determined through calculating the specific value of the measured optical power. The microwave frequency measurement chip realizing the detection of the unknown microwave signal by a silicon-based photonic integrated chip has the advantages of small chip size, light weight, high integration, low cost and electromagnetic interference resistance. Meanwhile, the invention further discloses an applying method and a preparing method of the chip.

The invention provides a chained static synchronous compensator with an active power adjusting capacity. The chained static synchronous compensator with the active power adjusting capacity comprises three phases of cascading chain links, connection reactors and breakers. Each phase of the cascading chain link comprises n cascading units which are connected in series at the alternating current side. One ends of the three phases of the cascading units are connected to form a neutral point of the static synchronous compensator, and the other ends of the three phases of the cascading units are connected into a three-phase grid through the corresponding connection reactors and the corresponding breakers. The invention further provides a corresponding cascading unit. An STATCOM and a BESS are combined, the capacity of controlling active power and reactive power at the same time is achieved, grid connection of medium voltage and high voltage is achieved in a manner of cascading multiple cascading units, a power switch device which is low in voltage resistance is used for achieving energy conversion of high voltage levels, modularization and redundancy design are easy to achieve, the function of balancing a battery is achieved, meanwhile, a bidirectional DC/DC converter is introduced at the direct current side, and ensuring the cycle life of the battery is facilitated.

The invention provides a one-button control circuit used for startup and shutdown and screen locking of portable equipment and a method of one-button controlling of startup and shutdown and screen locking. The one-button control circuit comprises a power supply which supplies power to the circuit, a light touch button, a power supply management unit, a micro-control unit and a control circuit. The power supply management unit is connected with the micro-control unit. The light touch button is connected with the micro-control unit through the control circuit. The light touch button realizes one-button startup, shutdown and screen locking of the equipment by the control circuit through the power supply management unit and the micro-control unit. The advantages and the beneficial effects of the one-button control circuit are that one light touch button is adopted, the characteristics of two chips of the micro-control unit and the power supply management unit are combined, and the control circuit formed by two N-MOS transistors is adopted so that the functions of one-button startup, shutdown and screen locking can be realized, the number of the button can be reduced, the resources of the MCU and the PMU can be fully utilized, and the one-button control circuit also has obvious advantages in multiple aspects of size, cost and user experience.

The invention relates to the technical field of solar condensation, and provides a compound parabolic condenser combining inside condensation and outside condensation. The condenser comprises a glass tube (2), a receiving tube (1) positioned in the glass tube (2), an inside compound parabolic condenser plate (3), an outside compound parabolic condenser plate (4), a heat preservation layer (5), support feet (6) and a support beam (7), wherein the receiving tube (1) and the glass tube (2) are respectively provided with a circle centre of the receiving tube and the circle centre of the glass tube; the circle centre of the receiving tube (1) is overlapped with the circle centre of the glass tube (2); vacuum is formed between the receiving tube (1) and the glass tube (2); the inside compound parabolic condenser plate (3) is arranged and fixed in the vacuum and is contacted with the glass tube (2); and a gap is formed between the inside compound parabolic condenser plate (3) and the receiving tube (1). The condenser has the characteristics of good condensation effect and simple installation.

The invention discloses an aircraft communication system, relates to the technical field of laser communication, and mainly aims to achieve laser communication between aircrafts and satellites. The aircraft communication system disclosed by the invention comprises at least one piece of aircraft-satellite laser communication terminal equipment, an electric control box, a rectification cover and a bracket, wherein the bracket has a damping function; the aircraft-satellite laser communication terminal equipment communicates with a satellite communication system through a laser link; the electriccontrol box is used for supplying power to the aircraft-satellite laser communication terminal equipment and used for providing control instructions to information streams; the rectification cover isof a structure which is transparent at least partially and is arranged on the outer side of the aircraft-satellite laser communication terminal equipment in a covering manner. The aircraft communication system is mainly applied to data transmission of aircrafts.

The invention discloses a method of forming sound vortex based on a patterned tailoring technology. The method comprises steps: a phase regulation thin film is determined, wherein the phase regulationthin film can change the phase of transmitted sound waves by 180 degrees; and the phase regulation thin film is tailored to have a Fermat spiral pattern, and the sound waves transmitted through the tailored phase regulation thin film can generate stable-propagation sound vortex. The stable sound vortex can be generated, the sound vortex can be propagated stably within a certain distance of a transmission field, the central intensity of the vortex is 0, the sound vortex can be obtained through the thin film and through controlling the tailored pattern, the obtained sound vortex can be used inaspects such as noise isolation, sound communication and particle manipulation, and the application prospect is wide.

The invention discloses a centrifugal hydrogen circulating pump. The pump comprises a volute, an impeller, an adapter, a pump shell, a motor stator and a motor rotor; and the volute comprises an axial air inlet formed in the center of the volute and a tangential exhaust pipe arranged in the circumferential direction of the volute, and the impeller is driven by the rotating shaft to accelerate and pressurize air and then exhaust the air from the tangential exhaust pipe. According to the pump, the impeller and the rotating shaft are connected to the adapter in a floating and suspended mode through a ceramic bearing and a bearing steel sleeve, and an O-shaped sealing ring is arranged between the bearing steel sleeve and the adapter, so that sealing is effectively achieved, and vibration caused by unbalance of the rotor and high-frequency and low-frequency excitation caused by unsteady flowing of airflow in the rotor are avoided; the flow requirement of a high-power fuel cell system with the power of 60 kW or above can be met; and aiming at the characteristic that the humidity and temperature change range of a working medium in a complex multi-phase medium environment is relatively large, the obstruction of flow field accumulated water on airflow is effectively prevented, the output current density of a cell is improved, and the stability of the output voltage of the hydrogen fuel cell is kept.

The invention discloses a ground station communication system, relates to the technical field of laser communication and mainly aims to achieve laser communication between the ground and a satellite.An aircraft communication system disclosed by the invention comprises at least one ground station laser communication terminal, wherein the ground station laser communication terminal communicates with the satellite; the ground station laser communication terminal comprises at least one ground station-satellite laser communication terminal device and communicates with the satellite through a laserlink based on the ground station-satellite laser communication terminal device; the ground station laser communication terminal further comprises a data communication interface and is connected witha public Internet network through the data interface. By adopting the system, communication can be carried out through the link between the ground station and the satellite, data of an aircraft in laser link connection with the satellite can be downloaded to the ground, and bidirectional communication of the aircraft with the ground can be achieved.

The invention relates to a face cam test and control system, which is based on the ARM. The system mainly comprises a power supply, a crystal, a reset circuit, an ARM, consisting of JTAG ports and working as an embedded CPU which is connected with FLASH and SDRAM; the invention also comprises a power-supply module, a buzzer, indicators, an eight-section nixietube and a system expansion bus, which are all connected with the embedded CPU. By using the distinctive features of the technology used in embedded products, the invention has self advantages of in size and power consumption. The invention does not have the problems such as crashes and upgrades, but has simpler and more convenient operation interfaces and operation manners, and relatively long lifecycle.

The invention provides an integrated point of interface (POI). The integrated POI comprises an upper cover having a first combining function, a cavity body that has a bridge circuit coupling function and is arranged below the upper cover, and a bottom cover that has a second combining function and is connected with the bottom of the cavity body. The integrated POI provided by the invention has the characteristics of small size and high space utilization rate.

The invention relates to the technical field of spectrum equipment, in particular to a weak light spectrum detection chip and a weak light spectrum detection method. The weak light spectrum detectionchip comprises a light modulation layer and a photoelectric detection layer, the light modulation layer comprises a bottom plate and at least one modulation unit, the bottom plate is horizontally arranged and connected onto the photoelectric detection layer, and a plurality of modulation holes penetrating through the bottom plate are formed in each modulation unit; the photoelectric detection layer comprises a plurality of groups of detection units, the detection units are arranged under the modulation unit, at least one photoelectric detector is arranged in each detection unit, and the photoelectric detectors are used for carrying out weak light detection on the modulated light after that incident light enters the modulation unit to form the modulated light, and obtaining a spectrum by reconstructing a response signal algorithm. According to the chip, a spectrograph is reduced to the chip level without depending on a precise optical instrument, the chip has the advantages of being stable in performance, low in cost, convenient to operate and carry and capable of moving flexibly, and spectral detection of weak light can be achieved.

The invention relates to a three-frequency two-element MIMO antenna capable of being used for WLAN/WiMAX/5G. The three-frequency two-element MIMO antenna comprises a substrate, an antenna and floors,and is characterized in that the antenna comprises two radiation units; high-frequency branches are arranged on the radiation units; the floors and the radiation units are arranged correspondingly, and low-frequency branches are arranged on the two floors; the low-frequency branches are adjacent; the high-frequency branches are located on the sides, away from the low-frequency branches, of the radiation units; and the whole antenna is of a symmetrical structure. Compared with the prior art, the three-frequency two-element MIMO antenna has the advantages of better isolation, low loss, miniaturization and the like.

The invention discloses an intelligent incident wave direction detection method based on a phase regulation metasurface, and aims to combine the phase regulation and control metasurface with a neural network calculation method to realize detection of the direction of an incident wave. The system is composed of an incident space, an observation space and an estimation space. A spherical coordinate system is adopted for representation of the incoming wave direction. The observation space is composed of a transmission type metasurface and a receiving antenna, wherein the transmission type metasurface is formed by periodically arranging sub-wavelength size units with adjustable phases. When the electromagnetic wave is incident, the metasurface of the observation space transforms a plurality of different phase distributions, and the receiving antenna receives corresponding amplitude data and sends the amplitude data into the neural network trained in advance to predict the direction of the incident wave. The receiving antenna is located at the oblique rear position of the metasurface. The metasurface formed by arranging the units with the thickness smaller than the wavelength is adopted to regulate and control electromagnetic waves, the receiving unit is only provided with one receiving antenna, equipment is simple and convenient to control and is suitable for development of the integration and miniaturization trend in the future.

The invention relates to a multi-aperture interference imaging method. The method comprises the following steps of: a, receiving an optical signal by using a plurality of small-aperture arrays, performing frequency division interference to realize interference imaging of the optical signal from an observation plane to an aperture plane to an image plane, and calculating to obtain a multi-apertureinterference image; and b, reconstructing a target image according to the obtained multi-aperture interference image. According to the invention, the imaging quality can be obviously improved, the in-phase adjustment difficulty of the imaging system is reduced, and the size, power consumption and weight of the system are greatly reduced.

The invention discloses a communication system, relates to the technical field of aviation and spaceflight, and mainly aims to increase the network transmission rate of an aircraft. The main technicalscheme is as follows: the communication system comprises a satellite communication system and an aircraft communication system; the satellite communication system comprises multiple satellites; eachsatellite carries an inter-satellite laser communication terminal device for inter-satellite communication, a to-air laser communication terminal device for communication between the satellite and theaircraft, and a to-ground laser communication terminal device for communication between the satellite and a ground station; the multiple communication satellites are in communication connection through a laser link based on the inter-satellite laser communication terminal device; and the aircraft communication system comprises a predetermined number of aircraft-satellite laser communication terminal devices for communication with the satellite, and performs communication connection with the satellite communication system through the laser link based on the aircraft-satellite laser communication terminal devices. The communication system disclosed by the invention is mainly used for air data transmission of the aircraft.