187results about How to "Lightning protection" patented technology

The invention relates to a wind turbine blade with a lightning protection system, where the blade comprises a shell body made of a composite material and comprises a longitudinal direction with a root end and a tip end. The blade further comprises a profiled contour including a pressure side and a suction side, as well as a leading edge and a trailing edge with a chord having a chord length extending there between, the profiled contour, when being impacted by an incident airflow, generating a lift. The lightning protection system comprises at least one lightning receptor arranged freely accessible in or on the shell unit surface at or in the immediate vicinity of the tip of the blade. The lightning protection system further comprises a lightning down conductor made of electrically conductive material extending within the shell body from the lightning receptor to the root end of the blade. The lightning receptor and the lightning down conductor are electrically connected. The shell body comprises at least a first conductive layer extending along at least a longitudinal part of the lightning down conductor in a transverse distance therefrom. The first conductive layer is electrically isolated from the lightning down conductor and from the lightning receptor, and has a sheet resistance in the range 1-5 Mega Ohm per square.

The invention discloses a GPS-based concrete transport vehicle monitoring system, including a GPS vehicle-mounted terminal installed on a transport vehicle and a monitoring center located in a production base. The GPS vehicle-mounted terminal includes a GPS receiver, a GPRS transceiver module, a serial communication module, a control module, a backup power source and a peripheral device. The monitoring center includes a communication server, a monitoring terminal, a data server and a projector. In addition, the invention also provides a method for the GPS-based concrete transport vehicle monitoring system. The invention can not only track the vehicle moving route in real time and correct the wrong route of the vehicle in time, but also can quickly find that the oil of the transport vehicle is stolen, and can instruct the vehicle or directly lock the vehicle when the GPS vehicle terminal fails or is artificially destroyed, so that a large-scale transport fleet is effectively monitored, and the safety, the convenience and the high degree of automation are achieved. The scheme can be applied to the technical field of concrete production and transport management.

A wind turbine blade with a lightning protection for a blade with a shell body has at least one lightning receptor arranged freely accessible in or on a surface of the shell body surface, and a lightning down conductor electrically connected to the lightning receptor and comprising an inner conductor made of electrically conductive material imbedded in a bedding insulation made of an electrically non-conductive material. The lightning down conductor further includes a first conductive layer having a resistance in the range of 10 to 10,000 Mega Ohm per meter (MΩ/m). The first conductive layer is located in a transverse distance from the inner conductor and being electrically isolated from the inner conductor.

The present invention relates to a coupler for a corrugated pipe that is provided with a sealing member mounted inside a fastening member and made of a softer metal material than the corrugated pipe, thereby preventing the fastening member from being damaged due to the fastening force of a cap nut, and that is provided with a grounding portion formed at the front portion of a metal sleeve in such a manner as to enter a coated layer of a composite member and to be grounded to a metal braided net of the composite member when the cap nut is fastened, thereby protecting the corrugated pipe from lightning.

A vacuum load switch is prepared as series-connecting isolation blade switch to vacuum arc distinguishing chamber, drive-connecting insulation drawing rod of isolation blade switch and insulation drawing rod of arc distinguishing chamber to operation mechanism, firm-sealing isolation blade seat and vacuum arc distinguishing chamber as well as bottom wire outgoing seat together, series-connecting fuse between bottom wire outgoing seat and cable outgoing plate.

Aiming at thunderstroke disasters, the traditional lightning rod has a certain function within a certain range, but thunderstroke disasters sometimes occur due to limited geometric length, small covering area, no electric charge leakage in cloud layers in advance and nothing about thunderstorms in high-altitude cloud layers. After the laser active anti-thunder device is adopted, when a certain amount of electric charges is concentrated in cloud layers, a laser 4 enables the emitted laser beams 5 to pass through an interceptor 8 and generate a conductive ion column 6 (ion conduction passage) so that a charged cloud layer 7 is connected with the interceptor 8 and a groundwire 10 to form a short-circuit bleeder circuit. The electric current in the cloud layer is leaked to the ground so as to avoid thunderstroke accidents. The device is applied to the fields of thunderstroke area, airport, missile, aerospace base, large-scale load-center substation, transmission substation, etc., which has the advantages of that the large covering range of anti-thunderstroke can leak the electric charge in cloud layers in advance and that the high cost performance can more effectively eliminate the thunderstroke disasters.

The invention relates to a wind vane, in particular to a multifunctional wind vane. The multifunctional wind vane comprises a supporting seat, a master bracket, a wind vane, wind power vane, a wind power gauge, a wind cup and a lightning rod, wherein the master bracket is vertically arranged on the supporting seat; the wind vane is transversely and fixedly arranged on the master bracket; the wind power vane is transversely arranged on the master bracket and is higher than the wind vane; the wind power gauge is arranged on the master bracket and is higher than the wind power vane; the wind cup is arranged at the top end of the master bracket; and the lightning rod is vertically arranged on the wind cup. The multifunctional wind vane integrates meteorological observation and interesting scientific display, can measure instantaneous wind direction and instantaneous wind power and mark all directions, and adopts scientific lightning-protection design.

"Integral structure, automatic shock-absorbing building" consists of the overall steel structure frame, interior and exterior decoration of the building, automatic shock-absorbing system, horizontal and vertical linkage levers and structural parts outside the building; it can automatically absorb shocks in a major earthquake, but cannot The destruction and collapse of the overall structure cannot cause casualties and deaths. In the design of the main building, bricks and cement in the current construction industry are not used, and all new building materials in the building materials market are used for decoration. This can solve the problem of construction problems. The heavy manual labor problem that the industry has not solved for thousands of years can be factory-produced and installed at the construction site when the number of buildings is large.

The invention relates to a monitoring and positioning device for leakage of a gas delivery pipe. The monitoring and positioning device comprises a monitoring host, a monitoring extension set and piezoelectric ceramic sensors, wherein the piezoelectric ceramic sensors are arranged at two ends of a gas pipe, the monitoring extension set is connected with the monitoring host in a communication way, a GPS (global positioning system) antenna is installed on the monitoring extension set, the piezoelectric ceramic sensors are arranged on gas pipes at the initial station and the terminal station, a signal amplifier is connected at the rear end of the piezoelectric ceramic sensor, the signal output end of the signal amplifier is connected with a data acquisition card of the monitoring extension set, and the audio receiving frequency of the piezoelectric sensor is 0.1Hz-10Hz. The monitoring and positioning device can sample and distinguish infrasonic wave of frequencies of 0.1Hz-10Hz in the gas pipes and are used for online monitoring on gas leakage. Proved by practice, the accuracy of the device on judging leakage can reach more than 98 percent; and compared with existing leakage monitoring devices, the device has considerable progress no matter in distinguishing efficiency or feasibility.

The invention discloses a wind energy and solar energy integrated power generation device with a lightning arrester. Solar rays irradiating in parallel are gathered through a convex lens glass plate, and therefore the light ray absorbing rate is increased; a solar cell movable plate is turned over through a cylinder, and therefore sunlight can irradiate the solar cell movable plate, the solar energy utilizing rate is increased, and the power generation amount is increased; and the solar cell movable plate is put away through the cylinder, and therefore vegetation on the ground cannot be shielded and can normally grow. A wind direction sensor can induct the wind coming direction, the wind direction sensor is in communication connection with an electric annular track, a sliding block on the electric annular track is made to drive a windmill power generation device to slide along the electric annular track, blades of the windmill power generation device face the wind coming direction all the time, and therefore the power generation efficiency of the windmill power generation device can be maximum, and wind energy can be utilized to the maximum extent. Under the action of the lightning arrester, lightning stroke can be effectively prevented, and safety of the whole power generation device is improved.

The invention relates to the field of automatic control, in particular to a water level control method and a water level control device for a control signal acquired from the earth. An AC 220V power supply is input through a first step-down circuit of an L line and a second step-down circuit of an N line which is symmetrical about the L line, then rectified through a rectifying circuit and subjected to voltage stabilization through a filter voltage stabilizing circuit, and then provides a stable direct voltage for a post-stage executive circuit. When a water level in a container is lower than a low water level, a high water level electrode and a low water level electrode are exposed out of the water surface; a load pump is communicated with the AC 220V power supply, the pump is electrified to start to pump water, and the water level gradually rises; when the water reaches the high water level, the high water level electrode is immersed by the water, then the load pump is not electrified to stop pumping the water, and the water level is controlled at the high water level; and the water is discharged from the container and the water level is gradually declined, the high water level electrode is exposed out of the water surface, a second executive switch is on, a first executive switch is off, and the water level continues to decline, when the water reaches the low water level, a control system is reset to an original state.

The invention relates to an optical fiber used in an outdoor system and an indoor system of a fiber-to-the-x (FTTx) network project in a communication network, fiber reinforced plastics used by the optical cable and a preparation method of the fiber reinforced plastics. As for the optical cable, at least one optical fiber is coated with a reinforced sheath which is the fiber reinforced plastics and is externally coated with a protecting jacket. The fiber reinforced plastics comprise the following components in parts by weight: 13-25 parts of light-cured resin and 75-87 parts of fiber yarn. The preparation method of the fiber reinforced plastics has the following steps: a, placing the light-cured resin in a constant temperature cabinet at the temperature of 70-90 DEG C for 1-2h; b, placing the light-cured resin and the fibre yarn in a solution tank for evenly mixing; c, pulling and extruding into a formed rod piece by a pultrusion module; and d, placing the formed rod piece in an ultraviolet curing oven for curing for 0.3-12s. The invention improves the safety protection performance of communication facilities and user terminal equipment; and the optical cable with fine diameter and small radium of curvature can satisfy the special requirements of easy branching, easy access and convenient construction in the FTTx network project.

A terminal box comprises a box body, a cover disposed on the box body, a temperature sensor disposed inside the box body, a humidity sensor disposed inside the box body, and an air conditioner disposed inside the box body. The cover is funnel shaped and provided with a central through hole which is connected with one end of a drain pipe. The other end of the drain pipe is arranged outside the box body. An air conditioner drain pipe is connected with the drain pipe. The box body is provided with the funnel-shaped cover which can effectively collect rainwater, and the rainwater is prevented from flowing to the body of a maintainer; when the interior humidity of the box body measured by the humidity sensor reaches a certain value, the air conditioner inside the box body is capable of automatically removing water to prevent too high interior humidity of the box body from affecting operation of the components inside the box body; when the interior temperature of the box body measured by the temperature sensor reaches a certain value, the air conditioner starts a cooling function and ensures the electric components never fail due to too high temperature; a blind window allows heat generated in the terminal box to dissipate out and also prevents lightning stroke in thundery seasons.

The invention relates to a lightning protection automatic switch for a satellite television receiver, which comprises a shell, wherein both ends of the shell are respectively provided with an external terminal which is connected with an external cable; the other end of the external terminal at one side is provided with an on-off interface, and the other end of the external terminal at the other side is connected with an internal cable; a guide rail assembly is arranged in the shell; a drive mechanism is installed on the guide rail assembly and is connected with the external terminal at the other side by the internal cable; a control circuit board and a motor controlled by the control circuit board are arranged on the drive mechanism; and one end of the drive mechanism is provided with a contact terminal which is matched with the on-off interface. The invention ensures that a receiver and connected equipment thereof can not be damaged by lightning overvoltage and lightning current when a satellite antenna is subjected to lightning stroke, and solves the technical problem of poor lightning protection effect and easiness for causing personal injury by plugging and drawing a plug every time in the prior art.