79results about How to "Passive" patented technology

The invention discloses a full-duplex wired/wireless hybrid access method and system based on a passive optical network (PON)/RoF. A radio frequency local oscillator modulates optical waves to generate sidebands through an optical modulator, one path of sideband polarization is separated to form an orthogonal branch B1 and an orthogonal branch B2, the other path of sideband polarization is separated to form an orthogonal branch B3 and an orthogonal branch B4, the B1 is used for a downlink data signal, the polarization of the B3 is adjusted to be parallel to that of the B1, the B1, B2 and B3 are coupled to generate fused optical signals, the fused optical signals are transmitted to a base station through optical fibers; and the B4 is reserved into an optical local oscillator for demodulating an uplink signal. A wireless access scheme of the base station is that quadruple optical millimeter waves and uplink carrier B2 are separated through a polarization beam splitter, and a wired access scheme of the base station is that common-frequency branches B1 and B2 and uplink carrier B3 are separated through a wavelength interleaved optical filter, and coherent demodulation of the branches B1 and B2 is realized. The reserved uplink optical carriers respectively can be used for bearing uplink wired or wireless signals, the uplink wired or wireless signals are transmitted to a central station and are demodulated through the optical fibers, and a full-duplex RoF link is finished.

The invention discloses a vehicle active transverse stabilizer bar, and mainly relates to the field of active safety of vehicles. The vehicle active transverse stabilizer bar comprises a servo motor, a transverse stabilizer bar body and a planetary gear mechanism. The servo motor is a power source and provides power for the vehicle active transverse stabilizer bar, the power is transmitted to the planetary gear mechanism by the servo motor, the transverse stabilizer bar body is broken in the middle and is divided into a left part and a right part, a left side structure and a right side structure of the planetary gear mechanism are symmetric and are both two-stage speed reduction torque increase dual-planetary gear mechanism bodies, and the left part and the right part of the transverse stabilizer rod body are connected to the left output end and the right output end of the servo motor respectively through splines. The vehicle active transverse stabilizer bar overcomes the defect that the capacity of a passive transverse stabilizer rod for resisting large-margin side inclination of a vehicle body is insufficient, and the vehicle active transverse stabilizer bar has the advantages of being simple and practical in structure, strong in bearing capacity, high in system reliability and capable of reducing vehicle side inclination angles and improving vehicle handling stability.

The invention discloses an energy collection and conversion device based on a friction generator, comprising a printed circuit board, at least one friction generator, an AC/DC conversion module, a trigger module, and an energy storage module. The AC/DC conversion module, the trigger module and the energy storage module are fixedly arranged on the printed circuit board. The AC/DC conversion module is used for converting alternating current generated by the at least one friction generator into direct-current electric energy. The trigger module is used for controlling output of the direct-current electric energy. The energy storage module is connected with the output end of the AC/DC conversion module or connected with a load under control of the trigger module. The invention provides the energy collection and conversion device of which the energy storage element and the energy conversion device are integrated on the PCB, and the energy collection and conversion device can power devices with large power consumption.

The invention discloses an inspecting system against fake-licensed vehicles. Vehicle related information and typical feature information captured in a traffic checkpoint are analyzed and processed, vehicle information, recording time, position information and the like are stored in a vehicle driving information database, driving record information of certain vehicle can be inquired by calling the vehicle information database, and a background analyzes the vehicle driving data to determine the vehicle is a fake-licensed or suspected fake-licensed vehicle. The inspecting system in which related query and inspecting information is displayed via lists and visualized images belongs to the technical field of data management and query in the computer field.

The invention discloses a system and a method for authenticating colorized face images. The system for authenticating the colorized face images comprises a network camera module, a face image conversion module and a face recognition module; and the method for authenticating the colorized face images comprises the following steps: step one, capturing the network camera module of the colorized face images; step two, converting the colorized face images into a new two-dimensional uncorrelated color space by using a PCA method; and step three, recognizing the face images in the new two-dimensional uncorrelated color space. The technical proposal of the system and the method for authenticating the colorized face images acquire the face images in a non-contact mode, the face recognition has intuitive property, passivity and non-invasive property and is a more natural, direct and convenient recognition mode, and simultaneously, the precision of the recognition result is high.

A high voltage potential transformer based on technologies of piezoelectric ceramics and reflective fiber optic displacement sensors is characterized by taking high-power piezoelectric ceramics as a voltage dividing assembly to be connected with a slice-type piezoelectric ceramic in series, obtaining information of primary voltage by converse piezoelectric effect of the slice-type piezoelectric ceramic, and measuring a dependent variable generated by the converse piezoelectric effect with a reflective fiber optic displacement sensor, thus completing measurement of the primary voltage. The non-contact measurement realizes passivity of the potential transformer and solves an insulation problem of the high voltage potential transformer. The high voltage potential transformer has good transient characteristics and linearity and stable temperature characteristics and causes no ferroresonance fault danger, and the product has simple insulation structure, small volume and light weight, thus greatly reducing power loss and manufacturing cost of the potential transformer at the same voltage class and achieving the aim of energy saving and exhaust emission reduction in the field of manufacturing primary equipment of the electric power system.

The invention discloses an electronic lock cylinder and an electronic key. The electronic lock cylinder and the electronic key work in a matched mode. The electronic lock cylinder comprises an outer fixing sleeve, a lock cylinder body, an electromagnet, an armature integrated with a linkage part, a following spring, a code identification and control circuit, a touch triggering device and an unlocking execution device. During use, when a code is right, the armature is attracted by the electrified electromagnet in place and not moved by the following spring, so that the touch triggering device is allowed to further trigger the unlocking execution device to execute unlocking operation; and when the code is wrong, the electromagnet is not electrified, the armature and the linkage part are pushed and pressed by the following spring to move and separated from the surface of a sucker of the electromagnet, the unlocking execution device is locked and cannot execute unlocking operation, and the electronic lock cylinder is kept locked. According to the electronic lock cylinder, force is applied by the touch triggering device, and a mode that work is done by moving the armature through attraction of the electromagnet is replaced, so that the power consumption of the electronic lock cylinder is greatly reduced. The electronic lock cylinder is matched with the electronic key.

The invention discloses a heat exchanger for heat exchange between liquid sodium metal and air, comprising a cylinder, wherein, an outlet air door is arranged at the top of the cylinder, and an inlet air door is arranged at the bottom. The invention is characterized in that an expansion tank is arranged at the upper part of an intracavity of the cylinder; an argon gas inlet connection is arranged at the top of the expansion tank, while the bottom is communicated with a sodium inlet pipe; the cylinder body is communicated with a heat exchange pipe bundle communicated with a sodium outlet pipe. The invention has the advantages that heat is taken away when air passes through the surface of heat exchange pipe bundle, enabling heat exchange between sodium and air; meanwhile, the chemical reaction between sodium and air is avoided due to inactivity.

The invention relates to a transmission line geological disaster monitoring system based on optical fiber strain analysis. The system comprises a stress optical cable sensor used for collecting real-time data in a monitoring area, an OPGW optical cable used for transmitting signals and installed in same design as overhead lines of power transmission lines, and a monitoring server located in a power transmission line machine room and used for receiving and analyzing signals, wherein the stress optical cable sensor, the OPGW optical cable sensor and the monitoring server are in communication connection with each other; the stress optical cable sensor has an optical fiber strain analysis function and comprises Brillouin optical time domain scattering monitoring equipment and a stress opticalcable serving as a sensing unit, wherein the Brillouin optical time domain scattering monitoring equipment and the stress optical cable are in communication connection with each other; and the Brillouin optical time domain scattering monitoring equipment can collect three-dimensional light scattering monitoring parameters of geological states in the monitoring area, and a relationship model and ageological disaster analysis model corresponding to geological disaster risk characteristic monitoring parameters and the light scattering monitoring parameters are pre-stored in the monitoring server.

The invention discloses a distributed all-optical voltage measuring system and a measuring method implemented by the same. The distributed all-optical voltage measuring system comprises a broadband laser light source, a light amplifier, a light circulator, a transmission fiber, a voltage sensing system, a light splitter, a light selection system, a photoelectric conversion system and an end signaldisplay and processing system. Laser light in certain wavelength ranges can be outputted by the broadband laser light source, power of the light source can be amplified by the light amplifier, amplified light signals can be transmitted into various sensor input ends of the sensing system by the transmission fiber, light signals can be fed by various sensors and can be screened by the light selection system, the light signals fed by the sensors with voltage change can be changed and can be outputted by corresponding channels of the light selection system, output light intensity signals can beconverted into voltage signals by photoelectric detectors, and additional voltage numerical values measured by circuits can be acquired by the aid of the end signal display and processing system. Thedistributed all-optical voltage measuring system and the measuring method have the advantages of passivity, high electromagnetic interference resistance, broad response frequency band and good power frequency response.

The invention provides a nanogenerator-based self-powered signal generator. The nanogenerator-based self-powered signal generator comprises a generating device, an energy storage device and a wireless transmission device. The generating device comprises a fixing mechanism, at least one cantilever beam mechanism and at least one nanometer generator. The nanogenerator-based self-powered signal generator realizes direct conversion of mechanical energy produced by cattle motion into electric energy by the nanometer generator, realizes signal-generator passivation, has a simple structure and good stability and improves step-counting accuracy. The invention also provides a nanogenerator-based cattle step-counting system. The system comprises a self-powered step-counting signal generator and a terminal. The terminal comprises a wireless reception device, a central processing device and a display device. The cattle step-counting system realizes cattle exercise amount data calculation and display by the terminal so that an operator can accurately grasp cattle physiological change and health conditions.

The invention discloses an intelligent authorization wireless power supply device based on wireless radio frequency of a mobile terminal. The intelligent authorization wireless power supply device comprises a transmission communication module and a verification control center, and is characterized in that the transmission communication module is connected with the verification control center; thetransmission communication module is used for collecting and receiving radio frequency signals sent by the mobile terminal and is responsible for energy conversion and data communication with the mobile terminal; the transmission communication module and the verification control center transmit interactive radio frequency signal data; the verification control center performs data operation processing on the radio frequency signal; the mobile terminal passes the authority verification; the received wireless radio frequency energy sent by the mobile terminal is converted into electric energy byutilizing the electromagnetic induction principle of the transmission communication module, and the electric energy is output by the appointed port in a power supply or data signal manner, so that theauthorization problem of identity permission of the mobile terminal wireless radio frequency before power conversion and power supply to the low-power-consumption intelligent hardware and before power supply is solved.

The invention provides a passive temperature sensor and a test system based on the same. The passive temperature sensor comprises a lamellar directional thin-film thermoelectric material Bi0.5Te1.5Se3 (4) composed of a nano-wire array, a Ti barrier layer (11), a Cu electrode (5), a Ni adhesion layer (10), an AlN substrate pole plate (6), a voltage-division type resistor temperature-measuring network and a diode (9), wherein the voltage-division type resistor temperature-measuring network is composed of a high-precision standard resistor (7) and a thermistor (8) which are connected with each other in series; the barrier layer (11) is used for preventing a diffusing effect between an electrode and a thermoelectric material; the adhesion layer (10) is used for connecting a metal electrode and a semiconductor substrate; the standard resistor (7) and the thermistor (8) are used for measuring the temperature; and the diode (9) is used for preventing current from entering into the thermoelectric material in an active work mode. According to the invention, electric signals generated by triggering the passive temperature sensor are used as a detection signal and a power supply, so that thepower is not needed to be supplied to the sensor.

The invention discloses a dry-wet method temperature and humidity sensing probe using an optical fiber grating sensor, which is widely used in the technical field of environmental parameter monitoring. The technical solution is: the probe is composed of a base plate, a water tank, an outer shield, a humidity drainage line, a fiber grating temperature sensor, a fiber grating humidity sensor, and a tail cable. The fiber grating temperature sensor uses fiber grating to sense the external temperature change, and the fiber grating humidity sensor uses the dry-wet comparison method to measure the relative humidity of the environment. The probe is used together with the fiber grating temperature and humidity sensor, which can realize the passive and all-optical sensor end, and has the function of wavelength division multiplexing and remote signal transmission.

The invention discloses a fiber Bragg grating demodulating system based on a volume holographic grating and relates to the technical field of fiber Bragg grating sensors. The fiber Bragg grating demodulating system comprises a broadband light source, a fiber Bragg grating, an optical fiber coupler, an optical fiber collimator, an optical fiber collimating lens, the volume holographic grating, a lens, a photoelectric detector, a signal processing system, a wireless transmitting device and a wireless receiving device. The fiber Bragg grating demodulating system based on the volume holographic grating has the advantages that a holographic grating demodulating system in the fiber Bragg grating demodulating system is simple, and a sensor has passive characteristics; the fiber Bragg grating demodulating system is high in anti-electromagnetic interference, light and insulated, has chemical properties of resistance to water, high temperature and corrosion and is capable of adequately providing precise monitoring data in severe environments.

The invention relates to a kilowatt-level underwater nuclear reactor power supply, comprising a fuel, a control drum, a radial reflection layer, a safety rod passage, a heat pipe and an axial reflection layer; the fuel is a columnar uranium-molybdenum alloy fuel, wherein the safety rod a passage and a heat pipe passage are arranged; the heat pipe is inserted into the heat pipe passage around the safety rod passage; the radial reflection layer is arranged on the outer side of the fuel, and the axial reflection layer is arranged at two ends of the fuel; the control drum is uniformly arranged inthe radial reflection layer. The kilowatt-level underwater nuclear reactor power supply has the beneficial effects as follows: the use of the uranium-molybdenum alloy fuel can avoid the risk of nuclear proliferation by using the fuel with a low degree of enrichment; the scheme uses the heat pipe to guide out core heat, eliminating two larger pressurized water circuits of TRIOS, and the heat pipe has the advantages of being passive and achieving non-single point failure.

The invention discloses a method for reducing soil pressure applied by a two-layered filling roadbed to a retaining wall. The method can be used for reducing the soil pressure applied by the two-layered filling roadbed to the retaining wall in the road construction process. In the invention, calculation of the soil pressure applied by the two-layered filling roadbed to the retaining wall is not based on Coulomb's earth pressure theory, but the flow rule related to force analysis and filling motion on horizontal soil layer unit bodies behind the retaining wall. The method, disclosed by the invention, not only can obtain the strength and distribution of the soil pressure applied by the two-layered filling roadbed to the retaining wall, but also can analyze the influence of different filling sequences on the soil pressure, thus selecting a lower soil pressure scheme. The method is very important in practice for scientifically and reasonably guiding design of the retaining wall in the road construction process.

The invention relates to a self-priming double-venturi structure decontamination device and an application thereof, which mainly solve the problems of single arrangement mode, inability to meet the emergency decontamination of toxic gases and low washing efficiency existing in the prior art. The self-priming double-venturi structure decontamination device comprises a gas straight pipe inlet, a liquid annular inlet, a Venturi tapered section, a Venturi enlarged section, a built-in Venturi liquid inlet pipe and a built-in Venturi section, wherein the liquid annular inlet is located on that inletof the gas straight pipe, passes through a straight pipe and is connected to the Venturi tapered section, the Venturi tapered segment is divided into two regions: the inner region and the outer region: the inner region circulates gas and the outer region circulates liquid, the top end of which is connected with the Venturi expansion section, the inner Venturi liquid inlet pipe is connected with the inner Venturi section, the inner Venturi section is located in the Venturi expansion section, the technical scheme connected with the expansion section solves the above-mentioned problems and can be used for decontamination.