66results about How to "With lightning protection" patented technology

The invention relates to a leakage monitoring and warning system of a large fiber-grating liquid gas storage tank, which comprises a wideband light source, a Y-shaped optical splitter, a temperature probe string, a wavelength demodulator, a computing unit, and an acousto-optic warning device, wherein the temperature probe string comprises a plurality of bragg fiber gratings; the wideband light source is connected with one splitting port of the Y-shaped optical splitter through an optical fiber; the combining port of the Y-shaped optical splitter is connected with the probe string comprising the bragg fiber gratings through an optical fiber; the other splitting port of the Y-shaped optical splitter is connected with the wavelength demodulator in series though an optical fiber; data is transmitted to the computing unit by the wavelength demodulator through a data wire; and the computing unit is connected with the acousto-optic warning device through a lead. The changing situation of the temperature within the range of -100-100 DEG C on the tank wall of the large liquid gas storage tank is monitored in real time and on line through a fiber-grating sensing network, and when liquid gas leaks and the monitored temperature change of the fiber grating is caused to exceed a temperature-reduction threshold value, acousto-optic warning can be triggered by the system.

The invention discloses a charging pile image acquisition system and a method of recognizing vehicle identity information by image acquisition; the charging pile image acquisition system comprises a charging pile and a vehicle identity auto-recognition system embedded in the charging pile; the vehicle identity auto-recognition system is connected to an information interface of the charging pile through a vehicle identity auto-recognition system communication interface; the vehicle identity auto-recognition system comprises an auto-recognition module and a camera, the signal output end of the camera is connected with the auto-recognition module, and the input end of a charging control module in the charging pile is connected to a cloud server. Recognizing is achieved herein by combining vehicle identity auto-recognition technology and the charging pile, the camera is mounted on a body of the charging pile at specific height, and the auto-recognition system is added in the body. The camera side of the charging pile faces a parking space during mounting of the charging pile. The camera used herein is small in size and is friendly to the integral structure of the charging pile; the charging pile image acquisition system has the advantages of good waterproofing property, lightning protection, good dustproof property, good antistatic property and the like.

The invention discloses a control circuit for a multi-functional protection socket, comprising a signal processing chip IC, a zero sequence current transformer L1, a controllable silicon VS1, a releasing coil L5, a rectifier circuit, a testing circuit, an indicator circuit, a piezoresistor RV1 and other resistor-capacitor unit. The control circuit is characterized in that the control circuit also comprises an over-current transformer L2, a recovery coil L4, a controllable silicon VS2, a short circuit coil L3, a temperature switch ST and a piezoresistor RV2. As the invention has the functions of electric leakage protection, over-load protection, over-heat protection, short circuit protection, over-voltage protection, anti-thunder, etc., the control circuit has wider protection range, and can protect the lives and the possessions of people more effectively and safely.

The invention discloses a wireless entrance machine / enclosure machine based on 3G / 4G communication. The wireless entrance machine / enclosure machine is characterized by comprising a CPU core board and a 3G / 4G module, an LCD display module, a keyboard module, a audio processing module, a unlocking module, an OTG debugging module, a DTMF module, a 485 communication module, an exit button module and an IC / ID card read module which are connected to the CPU core board. The wireless entrance machine / enclosure machine also comprises a SIM card module and power amplifier module which are connected to the 3G / 4G module. The power amplifier module is also connected to the audio processing module. The DTMF module is also connected to the 3G / 4G module. The wireless entrance machine / enclosure machine also comprises a power module which has a voltage conversion function. By the 3G / 4G network communication, owners can receive visit information anytime and anywhere and control unlocking of the community gate / cell gate. The wireless entrance machine / enclosure machine also has multiple unlocking modes such as modes of APP unlocking, swiping unlocking, property management company unlocking, button unlocking and the like. Construction cost is low, and maintenance and upgrading are also very convenient.

The invention provides an intelligent charging pile of electric vehicles, and belongs to the technical field of charging equipment. The charging pile comprises an AC / DC power supply module, an electric parameter acquisition module, an electric quantity measurement module and a main control MCU, wherein the AC / DC power supply module, the electric parameter acquisition module, the electric quantitymeasurement module and the main control MCU are sequentially connected, the AC / DC power supply module is connected with commercial power, the main control MCU is connected with an IC card reading module, a coin-feed module and a communication module. The electric parameter acquisition module is connected with the load control module, the temperature acquisition module and the leakage protection module, the main control MCU is connected with the temperature acquisition module, the load control module is connected with the charging output module, the electric quantity measurement module accurately acquires the voltage, the current, the power, the power factor and the electric energy consumption in the charging process in real time. The charging data acquisition part of the intelligent charging pile of electric vehicles adopts the electric quantity metering chip to accurately acquire the voltage, the current, the power, the power factor and the electric energy consumption in the chargingprocess in real time, and charges according to the actual consumed electric quantity.

The invention discloses a video monitoring system adopting wind / solar complementary power supply under a wireless Mesh network. The system has the functions of monitoring a large target area under the Mesh network and giving a fire alarm and an antitheft alarm, adopts the wind / solar complementary power supply, and is quick in deployment and convenient to mount and upgrade. Image quality and bandwidth occupation can be regulated. The system adopts software coding and decoding, and can regulate a frame number, resolution, the image quality and the like according to the needs of a user and realize the function of storing and replaying received video monitoring images by a computer or special equipment. The system supports a browser-technology-based network browsing function, and is convenient to use. A plurality of hops of routers are adopted for transmission, so normal data transmission can be ensured not to be influenced under the condition that an individual router is damaged or fails. The system and equipment have lightning protection capability, high voltage interference resistance and powerful data and alarm acquisition control and processing functions, can be normally run under the environments of high temperature, low temperature, strong wind, dust flying, torrential rain and the like, are widely applied in the fields of ports, wireless campuses and the like, and are seamlessly combined with a data monitoring system to realize the linkage of light and an alarm whistle and video recording in alarming.

The invention relates to a photovoltaic air-conditioning power supply control system and control method based on peak and valley price. The control system includes a DC air conditioner electrically connected with a converter, the converter acquires the peak and valley price information, the power-consuming period of the photovoltaic air-conditioning power supply control system at present is determined based on the peak and valley price information, the electric energy management information corresponding to the power-consuming period is transmitted to the DC air conditioner, the DC air conditioner receives the electric energy management information and the operation mode of the DC air conditioner is determined based on the electric energy management information, and the converter determines the power supply mode of the photovoltaic air-conditioning power supply control system based on the operation mode of the DC air conditioner. Through the combination of the peak and valley price of a power grid and the electric energy management of the photovoltaic air conditioner, the power supply mode of the system is reasonably planned based on the peak and valley price information, so that the electricity charge of users is effectively reduced, and grid-connected power generation can be achieved.

The invention discloses a lightning protection USB flash disk. The lightning protection USB flash disk comprises a USB interface, wherein the USB interface is connected with a lightning protection circuit, which comprises a diode D2, a diode D3, a voltage stabilizing diode D4, a resistor R4 and a field-effect transistor; the positive pole of the diode D2 is connected to the negative pole of the diode D3; the negative poles of the diode D2 and the voltage stabilizing diode D4 are mutually connected and are simultaneously connected to a VDD (Voltage Drain Drain); the positive poles of the diode D3 and the voltage stabilizing diode D4 are mutually connected and are simultaneously grounded; one end of the resistor R4 is connected with the positive pole of the diode D2, and the other end of the resistor R4 is connected to the drain electrode of the field-effect transistor; and the gate electrode and the source electrode of the field-effect transistor are mutually connected and are simultaneously grounded. The lightning protection USB flash disk has the advantages that as the lightning protection circuit is connected to the USB interface of the USB flash disk, the USB flash disk has a lightning protection function, and the circuit structure is simple and can be conveniently integrated into the USB flash disk without causing burden to the cost of the USB flash disk.

The invention discloses an AC input stroboflash-free LED driving circuit with a high power factor, and relates to the technical field of LED driving circuits. The LED driving circuit comprises a rectifying circuit, a valley filling capacitance filtering circuit, a voltage monitoring and comparison circuit and an on-off switching control and constant current circuit, and is characterized in that an input end of the rectifying circuit is connected to the AC mains supply, an output end of the rectifying circuit is connected with an input end of the valley filling capacitance filtering circuit, the valley filling capacitance filtering circuit is connected with an input end of the on-off switching control and constant current circuit through the voltage monitoring and comparison circuit, two groups of output ends of the on-off switching control and constant current circuit are respectively connected with two groups of LED lamp strings, the on-off switching control and constant current circuit controls the two groups of LED lamp strings to be connected in series when the voltage monitoring and comparison circuit outputs low level, and the on-off switching control and constant current circuit controls the two groups of LED lamp strings to be connected in parallel when the voltage monitoring and comparison circuit outputs high level. The driving circuit has the advantages that the composition is simple, the driven LEDs operate without stroboflash, and the power factor of the system is high.

This invention discloses a Beidou passive timming type receiving antenna including a microband antenna, a protection circuit, a first stage low noise amplifying circuit, a bandpass filter circuit and a second stage low noise amplifying circuit, in which, the microband antenna is connected to the protection circuit, which is connected to the first stage low noise amplifying circuit, the output of which is connected to the medium filter to be connected with the second stage amplifying circuit. Advantages: receiving in one-way, no limit to users, less sensitivity in receiving signals, small time delay, active antenna and coaxial feed.

The invention discloses a container type land dual-fuel power generation set which comprises a container, a dual-fuel engine, a main power generator, an auxiliary system unit and an exhaust system. The container is of an all-steel welded structure and is divided into a power chamber and a control chamber, the dual-fuel engine, the main power generator and the auxiliary system unit are arranged in the power chamber, and the exhaust system is arranged on the top of a body of the container; the exhaust system is connected with the dual-fuel engine, the dual-fuel engine and the main power generator are connected with each other by an elastic coupling to form a power generation set, and the power generation set is arranged on a common base via elastic support parts; the auxiliary system unit is arranged at a free end of the dual-fuel engine and comprises an engine cooling water system and an engine oil system. The container type land dual-fuel power generation set has the advantages that the container is compact in structure and high in adaptability and is portable, and the power generation set is high in power, fuel oil replacement ratio, safety and explosion-proof performance and low in exhaust gas emission.

The invention discloses an electric detection means, specifically a thermometry cable. The thermometry cable includes temperature sensor chip at least, protecting node which is out of the sensor chip and directing line which is connected with the sensor chip, the specific characteristics are: said top end of the directing line is T type injection part, the two sides of the T type injection part are two-core waterproof sealing connector, a circuit board which is connected with the left and right two-core connectors and the directing line is mounted in the inner of the T type injection part; the sensor chip is a digital temperature sensor chip which integrates the temperature sensor and signal pickup circuit, analog-to-digital conversion circuit. The invention has high accuracy, strong interference immunity, corrosion prevention, flexibility, tension; it can be widely used in various signals sensing system of temperature monitoring and detecting system, such as warehousing, agriculture, fisheries industry, mining industry.

The invention provides a high-voltage net-boom radiation-type insecticidal lamp of an improved structure, which belongs to the technical field of the electric appliance, and solves the technical problems of the present insecticidal lamp that the insecticidal effect is poor, the killed insects cannot be automatically cleared and the application is unsafe, and comprises a lamp cap and an insect collecting disc, wherein an insect attractive lamp is arranged between the lamp cap and the insect collecting disc, a plurality of flaky high-voltage net booms are arranged at the outer side of the insect attractive lamp, the high-voltage net book is connected with a power source which can provide the high-voltage current, and the high-voltage net booms are vertically arranged in a radiation shape with the insect attractive lamp as the center. The high-voltage net-boom radiation-type insecticidal lamp has the advantages of simple structure, good insecticidal effect, automatic clearing of insects, safer application and the like.

The invention provides a preparation method of titanium dioxide conductive powder. The method comprises the following steps: taking rutile titanium dioxide, adding a proper amount of deionized water and a proper amount of small medium balls, adding a tin salt, an antimony salt and niobium pentoxide in proportion while stirring, adding a reducing agent (zinc or magnesium or iron or a mixture of zinc, magnesium and iron), carrying out a reaction for 40-180 min after the addition of the reducing agent ends, adjusting the pH value of the obtained solution to 2-4 by using ammonia water, separating the adjusted solution through a centrifuge or a suction filtering device to obtain a wet precursor, and washing the wet precursor with deionized water with the volume 3-5 times the volume of the wet precursor 2 times; and drying the washed wet precursor at 130-180 DEG C for 6-13 h, calcining the dried precursor at 520-580 DEG C for 2.5-5.5 h, and crushing the calcined precursor through a jet mill to obtain the titanium dioxide conductive powder.

The invention provides a multifunctional power supply box, and relates to a safety protection technology of electric appliance loads. The multifunctional power supply box aims to solve the safety problems in an existing power supply power strip. A first power supply switch control element is a power supply main switch, wherein a power supply protective tube is connected to each live wire between the first power supply switch control element and a first power supply protective circuit in series; a power supply protective tube is connected to each live wire between a second power supply switch control element in power output circuits and a power supply output terminal in series; the power supply main switch, a branch switch and a standard charging terminal interface are arranged on a panel of a shell, a ventilation hole and an arc-shaped hole are formed in a rear baffle, and a socket is arranged inside the rear baffle. By means of the multifunctional power supply box, a main power supply and a branch power supply can be controlled safely and independently, and the main power supply and the branch power supply respectively have the overload and short circuit protection function, the lightning stroke resistance, surging resistance and current surge protection function, and the electromagnetic interference resistance protection function. The multifunctional power supply box is suitable for places such as families, enterprises, shopping malls and laboratories.

The invention relates to a super lightning protection mobile socket which comprises a shell body, a circuit board, an overcurrent sensor, a zero sequence mutual inductor, a test button, a reset button, a control circuit, an electromagnetic tripping device, two static contact pieces and two moving contact pieces on the N pole and the L pole; the electromagnetic tripping device consists of a framework, a main trip coil, a short circuit trip coil, an iron core and a spring; one end of each of the two moving contact pieces is arranged on the circuit board; an insulated pothook is arranged on two moving contact pieces; the other end of each of the two moving contact pieces is provided with a moving contact; an offsetting spring is sleeved on the reset button; the bottom of the reset button is provided with a reset pothook configured corresponding to the insulated pothook; the reset pothook is connected with the iron core; one end of each of the two static contact pieces is provided with a static contact; the other end of each of the two static contact pieces is arranged on the circuit board; the N pole runs through the zero sequence mutual inductor, bends outwards and traverses the overcurrent sensor; simultaneously, the L pole runs through the zero sequence transformer and the overcurrent sensor; a winding of the zero sequence mutual inductor is accessed to the control circuit. The invention has rapid speed of cutting off the power supply, is immediately grounded for protection and has high sensitivity and good reliability.

The invention provides a fire extinguishing plug for cable trench internal fire early warning and automatic alarm. The fire extinguishing plug is characterized by comprising a data display and acquisition module, an alarm module, a sensor group, an aerosol fire extinguishing module, a communication module and a fire extinguishing plug body. The extinguishing plug body provided by the invention hasthe functions of rain prevention, dust prevention and lightning protection. The upper part of the fire extinguishing plug body are provided with display and alarm devices, and a side face of the fireextinguishing plug is provided with a maintenance door to facilitate the maintenance and repair of the fire extinguishing plug. The front side of the fire extinguishing plug is provided with a switchbutton for controlling the display parameters of the display device to be switched between gas concentration and temperature, a seam of the maintenance door is subjected to special processing so as to ensure the waterproof and dustproof performance of the seam. With the consideration of high temperature in summer and low temperature in winter, different alarm and fire extinguishing data combinations are set for the temperature and mixed gas concentration, and false alarm and missed alarm are effectively avoided. Through setting the system power supply, the high reliability and high stabilityof a power supply system of the fire extinguishing plug are ensured.

The invention provides a vehicle washing machine and a vehicle washing method. The vehicle washing machine comprises a container, a washing device, a solution storage device, a license plate recognition system and a collection and payment system, wherein the container is provided with a washing cavity and an automatic door, and the automatic door is used for opening or closing the washing cavity;the washing device is installed in the washing cavity; a solution storage tank is connected with the washing device; the license plate recognition system is arranged outside the container; and the collection and payment system is in communication connection with the license plate recognition system and the washing device. By the adoption of the vehicle washing machine, a vehicle can be automatically washed, manual cost is greatly reduced, and the vehicle washing machine is high in flexibility and can be conveniently used by a user.

The invention discloses a 8-shaped biological bite prevention optical cable, wherein the cross section of the 8-shaped biological bite prevention optical cable is 8-shaped; the 8-shaped biological bite prevention optical cable comprises a main cable core and a hanging cable core, wherein the main cable core and the hanging cable core are arranged in parallel and connected into a whole through a hanging belt, the main cable core is of a layer-stranded structure or a central tube structure without a central reinforcing piece, and the main cable core comprises optical fiber cores; the plurality of optical fiber cores are mutually twisted to form a cable, a water-blocking tape is wrapped outside the optical fiber cores, an FRP armor layer is wrapped outside the water-blocking tape, an outer sheath is wrapped outside the FRP armor layer, and an inner sheath is selectively arranged between the water-blocking tape and the FRP armor layer. According to the 8-shaped biological bite prevention optical cable provided by the invention, a full-dry water blocking mode is adopted for blocking water, round or flat rod-shaped fiber reinforced plastic FRP is used for armoring, the effects of preventing biological bite and improving the mechanical properties such as stretching and flattening of the optical cable are achieved, and the whole 8-shaped biological bite prevention optical cable is of an all-dielectric non-metal structure, free of metal conductors, and lightning-proof and electricity-proof. The cable can be applied to overhead laying in mountain forest regions and power scenes, andthe communication stability is guaranteed.

The invention provides an on-line monitoring system of high-voltage power cable running temperature. The system includes a laser device, a bidirectional coupler, a constant-temperature slot, a signalprocessing circuit, a synchronization control module, a data storage device and a computer. The laser device, the bidirectional coupler and the constant-temperature slot are connected in series on a sensing optical-fiber link. Raman back-scattering light carrying temperature information returns to the bidirectional coupler after scattering of laser, which is emitted by the laser device, in sensingoptical-fiber. The bidirectional coupler is connected with the data storage device through the signal processing circuit. The data storage device and the computer are connected, and are used for converting optical signals into digital quantity, and storing the same into the data storage device after further signal processing to use the same for temperature calculation. The synchronization controlmodule is connected with the data storage device, the computer and the laser device respectively. The synchronization control module is used for sending synchronization clock control signals to the data storage device, the computer and the laser device for periodic collection of temperature signals.

The embodiment of the invention discloses a method and a device for an RS485 bus / node protector. The protector is used for protecting secure connection between a subordinate bus and a superior bus and secure connection between equipment and the bus, and an independent protection mechanism is provided. When the protector is connected between a node and the bus or between the subordinate bus and the superior bus, if the connected node and the subordinate bus connected with the protector fail (short-circuit, damage or abnormality), the bus with the node or the superior bus is not affected. In addition, the accuracy of the line sequence of an RS485 bus of equipment can be automatically detected, so that a reversely connected bus is automatically overturned to an accurate line sequence. According to the protector, an automatic protection function, an automatic starting function and an automatic overturning function are realized.

The invention relates to a video camera special for city road monitoring. The video camera is mainly characterized by comprising a main control module, a special DSP (Digital Signal Processor) for high light masking, an intelligent control module, a video camera, an image processing module, a storage module, a power supply control module, a dimming module, an infrared secondary light source module, a temperature control module, a temperature sensor, a constant-current conversion voltage-stabilizing module and a circuit protection module, wherein the special DSP for high light masking, the image processing module, the temperature control module and the temperature sensor are respectively connected with the main control module, the video camera is connected with the main control module through the intelligent control module and the special DSP for high light masking, and the power supply control module supplies power to the infrared secondary light source and the dimming module according to preset time under the control of the main control module. The video camera has high definition, low luminance and good stability, has the functions of high light masking, back light automatic compensation, white balance automatic regulation, high-speed electronic shutter and the like, and meets the requirement of city road monitoring.

The invention relates to the technical field of liquid level measurement and particularly provides a liquid level measuring device for an oil well fracturing operation tank car. The liquid level measuring device comprises an operation tank, a liquid level sensor, a current transducer, a micro processor, a display unit and an audible and visual alarm, wherein the liquid level sensor is mounted in the operation tank; the liquid level sensor is connected with the current transducer; the current transducer is connected with the micro processor; the micro processor controls the display unit and the audible and visual alarm to work; the micro processor and the display unit are arranged in an explosion suppression tank; the audible and visual alarm is arranged at the top end in the explosion suppression tank; the explosion suppression tank is mounted behind left and right fenders of a tank car; and a lightning-protection explosion suppression layer is additionally arranged on a circuit board of the current transducer. The liquid level measuring device is simple to operate and suitable for a worker to use, and high in reliability because of the lightning-protection and explosion suppression structure; an alarm signal is independently output by two relays which are used for increasing the alarm reliability; and compared with a conventional ultrasonic liquid level meter, the liquid level measuring device has cold-resistant characteristic and is especially suitable for a cold severe environment in north.

The invention discloses an ignition system for a fuel gas generator. The ignition system is characterized by comprising an ignition tube (2), an ignition cartridge (1), ignition powder (3), a radio-frequency protection chip (4) and a current protection chip (5); the ignition tube (2) is arranged in the center in the ignition cartridge and is attached to the position of the lower wall of the cartridge, and the ignition powder (3) is arranged in the space formed by the ignition cartridge (1) and the ignition tube (2); and the radio frequency protection chip and the current protection chip are connected with the ignition tube in parallel and then connected with a combustion chamber conducting rod through a wire. The ignition system has the beneficial effects of being resistant to water, damp, static electricity, lightning and electromagnetic irradiation and the like, and the safety of the fuel gas generator in the installing, using, transporting and storing processes and reliable work of the fuel gas generator after the fuel gas generator is stored for a long time in severe environments with high humidity, static electricity, lightning, electromagnetic irradiation and the like are ensured.

The invention discloses a long-distance tunnel cross section deformation monitoring and warning system of an identical fiber grating. The long-distance tunnel cross section deformation monitoring andwarning system comprises fiber deformation probe string, a chirp grating, a sound-light warning device and a broadband light source, wherein the fiber deformation probe string comprises two Y-shaped splitters, an orthogonal displacement converter and a fiber grating, the broadband light source is connected with a split port of a first Y-shaped splitter, a beam combination port of the first Y-shaped splitter is connected with the fiber grating deformation probe string by a fiber, the other split port of the first Y-shaped splitter is connected with a beam combination port of a second Y-shaped splitter by a fiber, a split port of the second Y-shaped splitter is connected in series with a wavelength demodulator, the other split port of the second Y-shaped splitter is connected in series withthe chirp grating, and the chirp grating is connected in series with the sound-light warning device. A wavelength division multiplexing technology is employed, multiple groups of identical fiber gratings with different central wavelengths are selected and are respectively arranged at each mark region of a tunnel, and the deformation of each mark region of a large-size tunnel is monitored in an real-time and on-line way.

The invention discloses a novel electric leakage protection socket, which is characterized in that: input ends of a live wire and a zero line of a power supply are respectively extended with a right-angled triangular point discharge metal sheet used for discharge; and points of the two metal sheets are oppositely arranged and spaced at a certain interval. In a concrete embodiment of the invention,power input connection pieces connected with input metal sheets of the live wire and the zero line of the power supply and input terminal screws of the live wire and the zero line of the power supplyare respectively extended with a point discharge metal sheet for discharge, and points of the two metal sheets are oppositely arranged and spaced at a certain interval. The live wire of the power input end of the electric leakage protection socket is also connected with the zero line at the power input end through a tripping coil and a voltage dependent resistor. The novel electric leakage protection socket can prevent thunder and lightening and the damage caused by high transient voltage due to other causes, and also prevent loads connected with the electric leakage protection socket, namelyhousehold appliances such as refrigerators, color TVs, air conditioners and the like from being stricken by high voltage.

The invention relates to back-to-back assembly for photovoltaic power station and a manufacturing method thereof. The method includes placing a jig under three or four sections of bare aluminum alloyconductor, each bare aluminum alloy conductor being respectively placed in a semi-circular groove II of the jig, two stranded tin-plated copper wire core conductors being respectively arranged in twosemicircular grooves I of each jig, welding two stranded tin-plated copper wire core conductors and an aluminum alloy conductor together by a spot welding machine, buckling a jig on the upper surfaceof each jig, heating the two jigs by a fusion welding machine, and melting the two stranded tin-plated copper wire core conductors and the aluminum alloy conductors into one body; Injection molding abus joint at the joint of aluminum alloy conductor and two stranded tin-plated copper core conductors and placing it into brine for water tightness test; connecting the other ends of the two photovoltaic cables on each bus joint to one solar connector. This module is used to replace the bus box, which meets the customer's requirements.

The invention discloses a cast-in-place pile static test karst cave recognition system based on distributed optical fibers. A load module is mounted on the top of a cast-in-place pile, and the cast-in-place pile is mounted in a pit of the ground in an embedded manner. An axial optical fiber and a compensation optical fiber are pre-buried in a pile body in an embedded manner, and the axial opticalfiber and the compensation optical fiber are connected to a data collecting module through an optical fiber lead-out wire. A jack is mounted on the top of the pile body, a load control instrument is electrically connected with the jack, a main beam is arranged on the top of the jack, a secondary beam and a bearing plate are mounted on the main beam, a heavy object is put on the bearing plate, andmultiple piers are further arranged on the two sides of the main beam. The system can recognize the positions of karst caves near a pile foundation in a karst region, and karst cave grouting is precisely positioned; and by means of the method, the shapes and the sizes of the karst caves near the foundation pie in the karst region can be recognized, and then the grouting amount in the treatment process of the karst caves can be determined.

The invention discloses an RFID-based hydrological telemetry terminal, which includes a central controller, a rainfall sensor, a water level sensor, a display screen, a power supply module, an RFID read-write module, a Zigbee wireless transmission network module, a lightning protection device module and an alarm module. The storage battery in the power module is connected to the solar panel through the solar controller to control the charging and discharging of the storage battery. The RFID reading and writing module collects the rainfall and water level information from the rain sensor and water level sensor, and transmits it to the Zigbee wireless transmission network module. An RFID-based hydrological telemetry terminal disclosed in the present invention combines RFID reading and writing technology with ZigBee wireless transmission network to realize functions such as automatic real-time data collection and long-distance transmission, and has high intelligence, good stability, and accurate data transmission In time, the service life of the equipment is improved, the manufacturing cost is reduced, and it is very suitable for use in harsh outdoor environments.

The invention relates to a solar charging device for an electric vehicle battery, comprising a storage box composed of a box frame and solar cell panels, a photovoltaic controller and connection leads. The solar charging device for the electric vehicle battery is characterized in that the solar cell panels installed on three side faces of the box body of the storage box are connected in parallel, and then sequentially connected with the solar cell panel installed on the upper surface of the cover body of the storage box and the photovoltaic controller inside the cover body of the storage box in series; the anode output end and the cathode output end of the photovoltaic controller are respectively connected with the anode and the cathode of the electric vehicle battery through the connection leads; and the contact points of the electrodes of the solar cell panels, the connection leads and the photovoltaic controller are all packaged by adopting silica gel. The solar charging device for the electric vehicle battery has the advantages of simple structure, low cost, environment friendliness and practicability and complete reliability, and is widely applied to electric motorcycles, electric bicycles and the like.