39results about How to "Clear design principles" patented technology

The invention is a method for in-situ monitoring of steel bar corrosion and stress state in a reinforced concrete structure. The method is to construct a prestressed self-balancing system, apply initial prestress to a steel bar sheet made of the same material as the steel bar in the concrete, and embed it in the concrete structure. Middle; set continuous strain measuring points at different heights on the steel bar sheet to monitor the stress state in this area; the steel bar sheet forms a plane stress state, and stress concentration occurs after local corrosion, and the strain changes at the continuous measuring points at different heights of the section reflect the initial corrosion of the steel bar Time, corrosion rate and degree of corrosion. The invention can be buried at different depths from the concrete surface, so as to realize the monitoring and corrosion risk assessment of the corrosion degree of steel bars at different depths and the stress state of the buried area. It is not affected by environmental factors such as various ions, temperature and humidity in concrete, and is especially suitable for the evaluation of the corrosion risk and corrosion degree of reinforced concrete structural steel bars in splash areas and tidal range areas in marine corrosion environments.

The invention discloses an all-optical switch based on a rubidium-atom optical filter and a method thereof. The all-optical switch based on the rubidium-atom optical filter comprises an alkali-metal rubidium-atom glass air chamber with a V-type energy level structure, two Glan-Taylor polarizers with the polarization directions perpendicular to each other and a stable magnetic field source used for generating a magnetic field with uniform intensity for the alkali-metal rubidium-atom glass air chamber, wherein the alkali-metal rubidium-atom glass air chamber, the two polarizers with the polarization directions perpendicular to each other and the stable magnetic field source form a standard atomic optical filter. The all-optical switch based on the rubidium-atom optical filter further comprises a 420 nm laser device serving as a control part of the all-optical switch of the atomic optical filter and a 780 nm laser device serving as a performance testing and application wavelength testing part of the all-optical switch of the rubidium-atom optical filter. The all-optical switch based on the rubidium-atom optical filter has the advantages of being clear in design principle, simple in structure, easy to manufacture, good in switching performance, stable in operation and long in service life.

The invention relates to a unimodal 87 Rb isotopic atomic filter used for laser frequency stabilization and a method for filtering by adopting the atomic filter. The filter consists of components of an external cavity laser 1, an optical isolator 2, a first semipermeable semi-reflective mirror 3, a second semipermeable semi-reflective mirror 4, a first high reflectivity mirror 5, a natural rubidium cell 6 and the like. According to the unimodal 87 Rb isotopic atomic filter used for laser frequency stabilization and the filter method thereof, by using the Faraday anomalous dispersion effect of isotopic 87 Rb ground state atoms in a magnetic field, a uniform magnetic field is generated through a magnetic field source, such as a permanent magnet, and the laser and atoms are interacted, so the laser polarization direction is changed. The laser transmission polarization direction is limited by two polarizing prisms, the light wave with specific frequency is chosen, and the goal of filtering is achieved. A system is enabled to be in a good working condition through a temperature control system. The unimodal atomic filter has the advantages of simple structure, high filtering performance, work stability, long service life and the transmission rate of being more than 78.0%. The unimodal 87 Rb isotopic atomic filter used for laser frequency stabilization and the filter method thereof have important significance in the experiment with interaction between light and atoms.

The invention provides a single-transmission peak atom light filter and a method using the light filter for light filtering. The atom light filter comprises an alkali metal atomic bubble, two polarizing films, a magnetic field source and a temperature control system, wherein the alkali metal atomic bubble is filled with inert gas. When the atom light filter is used for the light filtering, polarizing directions of the two polarizing films can be firstly adjusted to be mutually vertical, and light selection can be carried out for incident lights; the temperature control system can be utilized for controlling the temperature of the alkali metal atomic bubble; and then light rotation can be carried out for the incident lights by utilizing a faraday anomalous dispersion effect of alkali metal atom in a uniform magnetic field, and a single-transmission peak light spectrum can be obtained. According to the invention, the faraday anomalous dispersion effect which is realized after the inert gas and alkali metal gas are mixed is utilized, the design principle is clear, the structure is simple, the working is stable, and the laser performance is high.

The invention relates to a detachable multifunctional rehabilitation robot, which includes a front body mobile robot, a multifunctional body and an adjustable and transforming seat. The front body mobile robot can be separated from the body under the instruction of a host computer and be converted into six degrees of freedom at the same time. Robotic arm shape to achieve the purpose of fetching and delivery; adjusting and changing the seat can be converted into standing and lying states on the basis of the sitting posture state under the instruction of the host computer, so as to help the user stand and provide a resting position The multifunctional body is provided with a small table board and a conveyor belt, the small table board can facilitate the user to place newspapers, beverages and other sundries, and the conveyor belt can facilitate the user to perform part of the body movement in a standing state, the present invention is compact in structure and easy to use. , which improves the intelligence of robot services in the field of smart homes and reduces the waste of human resources, which is of great significance for the development of smart homes in the future.

The invention relates to a method of monitoring rusting risk of reinforcement in concrete in situ. The method includes the steps of 1, according to the principle of plane state of stress and stress concentration, applying prestress to rusting monitoring sensing units to enable them to be in a plane state of stress; 2, packaging three sides of each rusting monitoring sensing unit, and reserving one side as a rusting monitoring side; 3, distributing the rusting monitoring sensing units at equal intervals within a rectangular steel frame, before concreting, distributing the rectangular steel frame and the outer surface of concrete at a certain angle in an area to be subjected to reinforcement rusting monitoring, allowing the rusting monitoring sides to face a protective layer, and performing rusting monitoring through continuous strain measurement of different sectional heights of sheets. The method has the advantages that monitoring chloride threshold concentration fronts at different depths is achieved, initial rusting time of the reinforcement is predicted, results are updated according to monitoring data, the rusting monitoring sensing units as deep as the reinforcement allow the final initial rusting time, rusting rate and rusting degree of the reinforcement to be directly monitored.

The invention relates to a fixed wing aircraft open-water-area ditching test apparatus which is composed of a front gantry bracket (1), a middle support (2), a rear gantry bracket (3), a tail adjusting device, a throwing-in support (4), a tackle track (5), a weight throwing-in device, a damping device, a small tackle (6), a model throwing-in control device and a speed test device. The fixed wing aircraft open-water-area ditching test apparatus has the advantages that experimental requirements for fixed wing aircraft ditching under a stagnant-water state and a wave state are met, different throwing-in attitude angles of the an aircraft model are achieved, experimental projects which cannot completed in a pool are solved, and the fixed wing aircraft open-water-area ditching test apparatus is clear in design principle, and has strong operability, namely, maintainability.

The present invention provides a method for comprehensively judging the technical boundaries of separate injection wells. The method for comprehensively judging the technical boundaries of separate injection wells uses five nodes: ground water injection system, water injection shaft, water distribution nozzle, injection-production well, and oil well shaft. The integrated design method takes "interlayer flow difference" as the characteristic variable, takes selective and balanced water injection as the design goal, comprehensively considers the nozzle adjustment process limit and the reservoir limit, establishes a comprehensive limit chart, guides the selection of separate injection processes, and optimizes the measurement Adjustment process mode, the application of this method can effectively extend the measurement and adjustment cycle, reduce the labor intensity of personnel, and improve the effect of dispensing development.

The invention provides an optical fiber winding device for optical fiber macrobending loss measurement and an optical fiber winding method. The optical fiber winding device comprises a horizontally arranged rotating bracket and a core shaft vertically arranged at the center of the rotating bracket, and is characterized in that an end plate at one end of the rotating bracket is used for placing an optical fiber reel, the core shaft and the rotating bracket are movably connected, and the bottom end of the core shaft penetrates through the rotating bracket and is fixedly arranged; the optical fiber reel is arranged on the end plate at one end of the rotating bracket, one end of an optical fiber on the optical fiber reel is fixed on the core shaft, the rotating bracket rotates by taking the core shaft as an axis, and the optical fiber reel rotates towards a direction opposite to the rotating direction of the rotating bracket while moving along with the rotating bracket. The optical fiber winding device can achieve a purpose of directly winding an optical fiber without removing the optical fiber on an optical time-domain reflectometer, avoids an attenuation error generated in optical fiber macrobending loss measurement, ensures the optical fiber not to generate torsion stress in the winding process through the overall device structure and ensures the accuracy of optical fiber macrobending loss measurement.