132results about How to "Little impact from weather" patented technology

The invention relates to high-speed and long-distance fish shoal detection robot and a detection method. The detection robot comprises an external remote controller and a body, wherein the body consists of a casing, a power system, a snorkeling system, a detection sensor and a control communication system. The detection robot is powered by a gasoline engine on the water surface to sail to a fish shoal detection point at high speed, and then is powered by a storage battery to detect the density, the varieties and the quantity of the fish shoal after diving underwater by using a fish shoal detection sonar and a camera and transmit the detection result to an operator after upwards floating. The invention can accurately reach a plurality of designated positions for detecting waters at high speed and has the advantages of long sailing distance, less influence by the weather, capability of reducing the detection cost and improvement of real-time property and safety.

The invention discloses an urban traffic dispatching system and method based on image fusion in severe weather. The system comprises a traffic dispatching center, a synthetic aperture radar and an optical remote sensing radar, wherein the synthetic aperture radar and the optical remote sensing radar are carried on a satellite. The traffic dispatching center comprises an image processing sub-center used for processing real-time images to obtain real-time traffic flow levels of roads and an information issue sub-center used for issuing the real-time traffic flow levels of the roads to vehicle groups. The method includes the steps that image sequences of SAR images and PAN images of a city are shot through the satellite in real time; the images are transmitted and preprocessed; the SAR images and the PAN images are fused; the traffic flow levels of the roads are divided; road information is issued. According to the urban traffic dispatching system and method based on image fusion in severe weather, through image fusion, urban road traffic conditions are recognized and the traffic flow levels of all the roads are evaluated, information is broadcast to vehicles through the traffic dispatching center in real time, and thus urban traffic dispatching is achieved, and traffic jams caused by severe weather can be effectively prevented.

The invention discloses a straw burning monitoring method based on binocular stereoscopic vision and an unmanned aerial vehicle, and aims to solve the problems of inaccurate fire point monitoring information, low precision, large weather effect, high supervising cost and low efficiency. The straw burning monitoring method includes the steps: 1) presetting a cruising path, planning cruising in a GPS (global positioning system) module of the unmanned aerial vehicle by a ground operator before the unmanned aerial vehicle takes off, setting the flight path of the unmanned aerial vehicle in a farmland to be monitored and enabling the unmanned aerial vehicle to fly according to the preset cruising path after the unmanned aerial vehicle is started; 2) connecting the unmanned aerial vehicle with abinocular stereoscopic vision platform and an infrared sensor; 3) calibrating the binocular stereoscopic vision platform; 4) starting the unmanned aerial vehicle; 5) performing cruising monitoring bythe unmanned aerial vehicle: enabling the unmanned aerial vehicle to fly according to the preset cruising path, monitoring appearance of an abnormal area of an infrared heat source by the infrared sensor, and acquiring two straw burning images with different angles by double cameras; 6) processing the images; 7) performing three-dimensional reconstruction; 8) judging and processing monitoring results; 9) taking processing measures according to flashing warning.

The invention discloses a wind and light complementary power generation tethered balloon. The wind and light complementary power generation tethered balloon comprises a ball body provided with a fairing at the abdominal part and a tail fin connected with the ball body, wherein a solar battery is laid at the top of the ball body; a wind power generator set and a fuel power generator set are arranged at the abdominal part of the ball body; and a wind and light complementary controller and an energy storage battery are arranged in the fairing. The balloon disclosed by the invention adopts a wind power / solar energy complementary power generation mode and can be simultaneously combined with the power generator sets for achieving the purposes of energy conservation, environmental protection and ultra-long endurance time, and the wind and light complementary power generation tethered balloon can be widely applied to the military fields, such as border monitoring, early-warning guidance and the like, as well as the civilian fields, such as high-altitude communication relay, traffic control, counter-terrorism surveillance and the like.

The invention discloses a method for installing a thruster at the bottom of a drilling platform, wherein the drilling platform comprises a lower hull, the bottom of the lower hull is provided with a socket, and the socket is provided with an accommodating space (which is opened outwards and used for accommodating at least part of the thruster) and a sealing cover (for sealing the accommodating space). The method comprises the following steps of: providing a harbor basin, wherein water with a preset depth is provided in the harbor basin; placing the thruster in a designated area of the bottom of the harbor basin; enabling the drilling platform to float in the water in the harbor basin, and moving the drilling platform, so that the socket at the bottom of the drilling platform and the thruster at the bottom of the harbor basin are aligned in the vertical direction; and removing the sealing cover of the socket; and hoisting the thruster, so that at least part of the thruster is inserted in or jointed to the inside of the corresponding accommodating space of the socket. According to the installation method disclosed by the invention, the operability is strong.

The invention relates to a process of wireless monitoring medical treatment and the device. The process comprises: collecting basic life parameter information and position information of monitored object, transferring said information to service device by wireless communication way, service device treating and storing said information and monitoring basic life sign and position; said wireless communication way is based on combined way of short wireless communication and wireless communication public network. The invention is suitable for non-interruptible monitoring medical treatment in real time for specific or non-specific people, and it is characterized by wide coverage, high reliability of data communication, good accuracy of location, little influence by weather and good compatibility with Internet network.

The invention provides a topomap surveying and mapping method and device, and relates to the technical field of geographic information measurement. The method comprises the steps that a measuring areaof a to-be-surveyed and mapped terrain is determined, wherein the measuring area is a constructed road in the to-be-surveyed and mapped terrain; and the measuring area is subjected to topomap surveying and mapping by adopting a vehicle-mounted three-dimensional laser scanning measuring system, surveying and mapping equipment and a work mode of field work repair measuring, and a topomap of the measuring area is determined. According to the topomap surveying and mapping method, the vehicle-mounted three-dimensional laser scanning measuring system is mainly used to scan the measuring area, internal work personnel process data obtained by scanning to obtain a topomap sketch, and field work personnel perform repair measuring; the method realizes that most of work of topomap surveying and mapping is converted into internal work from field work, so that the field work cost is greatly reduced; and the three-dimensional laser scanning measuring system takes a vehicle as a platform, so that themeasuring area is convenient to enter, work conditions are loose, and the technical problems that an existing large-scale topomap production mode is high in cost and work is affected by various factors are relieved.

The invention discloses a vehicle. The vehicle comprises a weather information acquiring device, a video device and a controller. The weather information acquiring device is used for acquiring real-time weather state information of the geographic position where the vehicle is located, the video device is used for collecting video information in the running process of the vehicle, generating images according to the video information and displaying the images, and the controller is used for adjusting video collecting parameters of the video device according to the weather state information to correct the displayed images. According to the vehicle, the provided video information is hardly influenced by weather, and higher safety is achieved. The invention further discloses a vehicle system and a parameter adjusting method of the vehicle video device.

The invention discloses an alfalfa layering parting harvester and an alfalfa layering parting harvesting method, and belongs to the field of agricultural mechanical manufacturing. The harvester mainly comprises a self-propelled base plate, a machine frame, an upper mowing platform, an upper conveyor, a storage box, a leaf detacher, a lamina conveyor, a lower mowing platform, a modulator, a strip collector, an upper mowing platform hydraulic rod and a machine frame hydraulic rod. During operation, the harvester completes alfalfa layering parting harvesting by the following three main steps of:harvesting alfalfa top layers, performing parting harvesting of stems and leaves, and harvesting the stems. The method for harvesting the alfalfa is not influenced by the weather, the loss of flowersand the leaves in the collection and storage process can be reduced, the separation harvesting of the stems and the flowers and leaves of alfalfa is realized, and high-quality primary grass products are provided.

The invention belongs to the technical field of vegetable grafting, especially a grafting method for tomato. The method comprises the steps: selecting stock seedlings with strong appetency and scion for cutting, grafting and management after grafting. The method specifically comprises the following steps: cultivating scion; the stock seedlings and scion sterilization; and the management after grafting. The method is simple, is easy to operate, is high in grafting survival rate, is high in speed of regrowth, and saves labor. The impact on the method from weather is very small, and the performances of water absorption and moisture retention are high. For good seedlings, the cost can be greatly reduced, and the varieties of tomato can be improved. In addition, the resistance is improved, and the yield is improved.

The invention discloses granite-simulative multi-color paint and belongs to the field of building paint. The granite-simulative multi-color paint comprises, by weight, 70-80 parts of base paint and 20-30 parts of multi-color composite rock slices. The base paint comprises, by weight, 440-460 parts of deionized water, 460-480 parts of an emulsion, 25-35 parts of a 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate film-forming assistant, 1-2 parts of a pH conditioning agent, 2-3 parts of a wetting agent, 1.5-2 parts of propylene glycol, 1.5-2.5 parts of an antiseptic, 1-2 parts of an antifoaming agent and 2-3 parts of a thickening agent. The multi-color composite rock slices have diameter of 4-8mm and thickness of 0.25-0.35mm. The invention provides a preparation method of the granite-simulative multi-color paint. The preparation method has simple processes. The granite-simulative multi-color paint has a long storage period, can be simply and conveniently constructed and satisfies building decoration demands.

Data transmission structure in two stages is adopted in the invention. First stage is transmission between terminal for collecting basic life parameters and access point of collecting terminal. First stage is implemented through short-range wireless transmission technique. Second stage is transmission between access point of collecting terminal and service devices as well as monitoring terminals. Second stage is implemented through public network of wireless communication. The system is suitable to real-time monitoring health of citizens in region covering whole city, and person monitored is allowed roaming about in whole country. It is point-to-point connection between terminal carried by monitored person and access point through short-range wireless communication mode. All access point of collecting terminal is connected to public network of wireless communication. The said basic life parameters are gathered, processed and displayed at service devices and monitors.

The invention relates to a superimposed fabricated pipe gallery structure system component industrialization construction device and method. The superimposed fabricated pipe gallery structure system component industrialization construction device comprises a production intelligent management system. The superimposed fabricated pipe gallery structure system component industrialization constructionmethod comprises the steps that a, edge formworks are manufactured, pre-buried components are mounted on manufactured steel reinforcement frameworks, and the steel reinforcement frameworks and the edge formworks are subjected to formwork assembly operation on a formwork table; b, by adopting a distribution machine, concrete is poured onto the steel reinforcement frameworks and the edge formworks which are subjected to formwork assembly, and vibrated, and thus concrete components are obtained; c, the concrete components are cured in a curing kiln through steam; d, single sided boards loaded with superimposed-type double-layer boards are superimposed and sent to the curing kiln for secondary curing; e, the components are subjected to formwork release and stored on a component stacking field,and in the storing process, the superimposed-type single-layer boards and the superimposed-type double-layer boards are subjected to water spraying curing through a spraying system; and f, the components are conveyed to a site to be assembled and mounted. According to the superimposed fabricated pipe gallery structure system component industrialization construction device and method, on-site construction is easy, energy saving and environmental friendliness are achieved, long-time exposure of a foundation pit is reduced, the influence of weather on construction is small, and pollution emission and cost are reduced.

The invention discloses an I-shaped semi-vertical linkage protection slope building block with open holes. The building block comprises an I-shaped building block body prefabricated with dry hard concrete materials through a vibration extrusion forming process, and is characterized in that linkage tenons are arranged on the faces, opposite to flanges, in two groove openings formed by the two flanges and a web of the I-shaped building block body; the linkage tenons in the same groove opening are symmetric, the linkage tenons in the different groove openings are arranged vertically, two holes are formed in the web, and the outer sides of the two flanges are each provided with a groove. A protection slope formed by laying the building block has better integrity than a traditional protection slope, wave runup and uplift pressure are lowered through the open holes of a face plate of the building block, and high erosion resistibility is achieved. The building block can adapt to small-amplitude changes of temperature, and is good in frost heaving preventing capacity, high in construction efficiency, and the protection building thickness of the protection slope can be reduced. The building block is durable and overall attractive and elegant, investment is saved, and later running maintenance is convenient.

The invention provides a building decoration paster and a manufacturing method thereof. The building decoration paster comprises a reinforced mesh layer, a waterproof layer is arranged on the reinforced mesh layer, a moulding coating layer is arranged on the waterproof layer, and a top facing layer is arranged on the moulding coating layer. The invention further comprises the manufacturing method of the building decoration paster. The building decoration paster can be obtained through industrialized prefabrication production, moulding is conducted through moulds, and the expressive force of moulding and color matching is strong; the building decoration paster is used for replacing painting of building coating on the wall surface on site, on-site construction is easy, and influence of weather is small; influence of on-site construction conditions does not exist, when the construction is conducted, protection is not needed, and adjacent parts which do not need to be painted are not polluted; due to the fact that a workshop is formed through maintenance, noxious odour is not emitted on site, and the workshop can be put in use immediately.

The invention relates to an airbus, which is characterized by comprising a carriage and a rail, wherein the rail is erected in the air, the top of the carriage is fixedly provided with a hanging rod, the top end of the hanging rod is hinged with a hanging arm, the other end of the hanging arm is provided with a wheel axle through a bearing, wheels are arranged on the wheel axle and are clamped in the rail, the wheel axle is connected with an electric motor arranged in the carriage, and the electric motor is electrically connected with a vehicle controller arranged in the carriage. The airbus can be used as a traffic tool for relieving traffic conditions, can also be used as a traffic tool for sightseeing and can also be used as tools for conveying passengers in playgrounds and the like. The running is safe and stable, the influence by weather is small, in addition, the occupied area is small, and the urban space is saved.

The invention discloses a biogenic herbicide which is characterized by being prepared from, by mass, 15-25 parts of artemisia scoparia, 10-15 parts of fragrant eupatorium herb, 10-20 parts of coptis chinensis, 10-20 parts of melia azedarach bark, 15-25 parts of celastrus angulatus, 10-20 parts of dicranopteris pedata, 20-30 parts of lemons, 10-20 parts of green plums and 1-3 parts of a penetrating agent.The materials are smashed, extracted, mixed and purified to prepare the biogenic herbicide.The biogenic herbicide is good in drug type.Through medicine effect comparison, the biogenic herbicide has a better prevention effect than a traditional herbicide and is free of toxin and harm, little in environment pollution and capable of effectively guaranteeing safety of crops, and accordingly it is guaranteed that people and animals cannot be harmed by absorbing chemical matter from the crops.

The invention discloses insect-preventing non-woven fabric which is prepared from adhesive, deinsectization agents, polypropylene, methyl cellulose, nylon and dacron. The insect-preventing non-woven fabric is formed by compositing methyl cellulose and the deinsectization agents with polypropylene, nylon and dacron at high temperature after methyl cellulose and the deinsectization agents are bonded through the adhesive, acrylic ester is adopted as the adhesive, and pyrethrin, tobacco extract, rosin, a santonin solution, a toosedarin solution, a natural mineral insecticide, sodium fluoride and sodium fluosilicate are adopted as the deinsectization agents. The insect-preventing non-woven fabric is prepared from 20-30 parts of adhesive, 8-30 parts of deinsectization agents, 10-20 parts of polypropylene, 15-35 parts of methyl cellulose, 25-35 parts of nylon and 20-30 parts of dacron. In the using process, the insect-preventing non-woven fabric is stable in performance, good in insect preventing effect, high in environment tolerance and long in service life.

The invention provides a shield mud treatment system, which comprises a shield waste slurry suction pump, a fully-automatic flocculant preparation and feeding system, a mud reaction pool, a concentration pool, a clear water pool and a two-stage dewatering sieve, wherein the slurry outlet of the shield waste slurry suction pump and the agent outlet of the fully-automatic flocculant preparation andfeeding system are respectively connected to the mud reaction pool, the output end of the mud reaction pool is connected to the concentration pool, the overflow port of the concentration pool is connected to the clear water pool, the underflow outlet of the concentration pool is connected to the two-stage dewatering sieve through a screw pump, the underflow reflux groove of the two-stage dewatering sieve is connected to the concentration pool, and the residue outlet of the two-stage dewatering sieve is communicated to a residue soil field. According to the present invention, the flocculant solution is automatically prepared, and is mixed with the waste slurry, and the supernatant is discharged and the underflow is subjected to dewatering residue discharge after the concentration treatment,such that the cost can be effectively reduced, the system and the method are less affected by the weather, and the shield waste slurry treatment efficiency is improved.

The invention discloses an intelligent identification plate, and belongs to the field of identification devices. The main points of the technical scheme are that the intelligent identification plate comprises an identification structure and power supply structures arranged on the road, the identification structure comprises a vertical column fixedly connected with the ground and a plate provided with identification information, the plate is fixedly connected with lamp strips arranged into the identification information, each power supply structure comprises induction power generation devices,each induction power generation device includes wires and permanent magnets which relatively and vertically slide, the wires are electrically connected with the lamp strips, the wires and the permanent magnets slide in a mutually approaching direction and the wires cut magnetic induction lines of the permanent magnets when a vehicle passes by the power supply structures, and each power supply structure further comprises reset springs which enable the wires and the magnets to slide in a direction of being away from each other. The intelligent identification plate has the effect that the energy-saving efficiency is not affected by the weather.

The invention discloses a WSN node self-powered system and belongs to the technical field of a wireless sensor. The system comprises a photovoltaic cell, an MPPT module, an energy management module, avoltage reducing and stabilizing module, a node module and a control module. The MPPT module comprises a first detection circuit, a PWM disturbance generation circuit and a BUCK circuit. The energy management module comprises a lithium battery, a super-capacitor, a second detection circuit, a third detection circuit, a first switch circuit, a second switch circuit and a third switch circuit. Thecontrol module combines with an MPPT algorithm and carries out maximum power point tracking on the photovoltaic cell through the PWM disturbance generation circuit; and the control module controls opening or closing of the first switch circuit, the second switch circuit and the third switch circuit according to the detection information of the first detection circuit, the second detection circuitand the third detection circuit. The system solves the problems that an existing WSN node self-powered system is low in solar energy utilization, is greatly influenced by weather and does not have a power management function.

The invention discloses a monitoring system and method based on a vibration sensor array. The system comprises a monitoring array and a control box; the monitoring array consists of a plurality of vibration sensor sets having the same structure and is arranged in an early-warning zone or arranged close to the warning zone; the control box is connected with the monitoring array and is used for sending out a warning remind when vibration signals obtained by monitoring of the monitoring array satisfy the preset conditions. The monitoring method comprises the following steps of: arranging the monitoring array in an early-warning zone or close to the periphery of the early-warning zone and sending out a warning remind through the control box when the vibration signals obtained by monitoring of the monitoring array satisfy the preset conditions. The system disclosed by the invention has low cost, is convenient to arrange, is difficult to be perceived and found because the vibration sensors are located below the earth surface, is influenced less by the weather, has no special requirement on the installation site and can realize the function of an all-weather real-time virtual fence. Meanwhile, the equipment is arranged in a guard zone (a controllable zone), so that the system can be prevented from damage dangers and the sustainability and the security of the system can be promoted.

The invention relates to a high-speed carrying cart and method for horizontal launching of a carrier rocket. The high-speed carrying cart mainly comprises a cart body, a power device, a control system, a rocket launching frame and an ignitor, wherein the ignitor is installed on the rocket launching frame, the rocket launching frame is installed on the cart body and is provided with an oblique surface, the lower side of the cart body is fixedly connected with a carrier rack, wheels are installed on the carrier rack, and the cart body is driven by the power device. By the design of the novel structure, high-speed movement and horizontal launching of the rocket are achieved, a high initial velocity is obtained during rocket launching, so that the efficiency of the rocket is improved, fuel is saved greatly, the dead weight of the rocket is reduced, and thrust-weight ratio and loads are increased.

The invention discloses a method for planting dry-land Brassica napus by using mulching film corn residual films, which is characterized in that the residual films are reserved after mulching film corns are harvested, and the Brassica napus is dibbled by using broken films according to the original specifications, i.e. the ridge width being 1.0m to 1.2m and the ridge spacing being 0.3m to 0.5m, the row spacing being 20cm to 23cm, the plant spacing being 25cm to 30cm, 0.2kg to 0.3kg of seeds per mu land and 5 to 8 grains per pit; when 3 to 5 main leaves grow from the Brassica napus, final singling of seedlings is completed at one step, two seedlings per pit are left and the density is controlled to be 18000 to 20000 plants per mu; and when 6 to 8 main leaves grow from the Brassica napus, the residual films are uncovered, intertillage soil loosing is conducted in combination with application of 8kg to 10kg of urea to promote the seedlings and the soil among ridges is lifted up to the ridges for planting the Brassica napus. By reusing the residual films, the method effectively solves the problems of insufficient soil moisture, low ground temperature, uneven emerged seedlings, poor seedling growth and high field management labor input from the sowing to the stage of the dry-land Brassica napus with 8 main leaves, realizes the tillage-free and drought-resistant cultivation of the Brassica napus, and achieves the goals of cultivating strong seedlings, saving the cost and increasing the efficiency during Brassica napus production.

The invention relates to a double-source heat pump, in particular to a solar energy-fuel cell-heat pump combined energy supply system. The solar energy-fuel cell-heat pump combined energy supply system comprises a water source heat pump part, an air source heat pump part, a control device and a battery, wherein the water source heat pump part comprises a solar photovoltaic thermal collector, a double-source heat pump, a water storage tank and an intermediate heat exchanger; a water outlet of the solar photovoltaic thermal collector is connected with a water inlet of the water storage tank; a first water outlet of the water storage tank communicates with a first water inlet of the double-source heat pump; a first water outlet of the double-source heat pump is connected with a user; a secondwater inlet of the double-source heat pump is connected with the user; a second water outlet of the double-source heat pump is connected with a first water inlet of an intermediate heat exchanger, afirst water outlet of the intermediate heat exchanger is connected with a second water inlet of the water storage tank, and a second water outlet of the water storage tank is connected with a water inlet of the solar photovoltaic thermal collector A. The light energy and heat energy of solar energy are fully utilized, and a high-efficiency methanol reforming fuel cell fuel processing system for recycling is introduced to provide stable low-temperature heat source and sufficient electric energy for the heat pump, waste heat is recovered and utilized, and the utilization rate of energy is greatly improved.

The invention relates to aschersonia aleyrodis yellow non-woven cloth antibacterial and a preparation method thereof, i.e. a production process method for producing an aschersonia aleyrodis yellow non-woven cloth antibacterial of a fungal pesticide for effectively preventing sucking pests of orange gardens and tea gardens. The method comprises five production procedures including stain obtainment, one-stage bevel strain culturing, liquid seed culturing, liquid fermentation tank production and inoculation culturing of a yellow non-woven cloth bacteria strip. The pesticide has lasting control effect on the pests, obvious and stable effect on killing aschersonia pests with tendency to yellow habit in the orange gardens and tea gardens, little influence by weather, stable process, little investment, small land occupation space and no three wastes in production.

The invention discloses a fertilizer drum mixer with detachable mixing blades. The fertilizer drum mixer comprises a mixing drum and a mixing shaft, a mixing drum rotating shaft is connected on a support, the support is fixedly connected at the upper end of a base, a hollow driving shaft is fixedly connected on the left side wall of the mixing drum, a supporting shaft is fixedly connected on the right side wall of the mixing drum and connected in an electric conduction sliding ring in an interference fitting manner, a plurality of infrared heating lamps and ultraviolet germicidal lamps are fixedly connected on the right inner wall of the mixing drum, the mixing shaft is of a hollow prism structure, a plurality of storage grooves are formed in the side wall of the mixing shaft, mixing rods are connected on the mixing shaft and positioned at the storage grooves, and a push-pull rod fixedly slides in the mixing shaft and connected with the mixing rod through connecting rods. The fertilizer drum mixer can serve as an individual drum mixer or a blade and drum combined mixer and is more flexibly and conveniently used, raw materials can be dried and sterilized when rolling, drying and sterilizing efficiency is effectively improved, and the fertilizer drum mixer is convenient and rapid to use.

The invention discloses a solar seawater desalination system, comprising a solar heating device, a steam-water separator, a condensation device, a water supplementing device and a warming and heat-storing device, wherein a header is vertically arranged, a water supplementing outlet of the water supplementing device is communicated with a water inlet of the header, the steam-water separator is arranged between and connected with an upper end opening of the header and the condensation device, a steam separating opening of the steam-water separator is communicated with a steam inlet of the condensation device, and a water supplementing inlet of the water supplementing device is connected with the warming and heat-storing device. The solar seawater desalination system provided by the invention is used for solar seawater desalination and has the characteristics of a fast water circulation speed, rapid heat transfer, long duration of continuous distillation, little influence by weather, good adaptability, etc. Moreover, in the operation process of the system, integral power consumption and energy dissipation are small, operation cost is low, latent heat of cooling of steam is effectively used, and a high utilization rate of solar energy is realized.

The invention discloses an infrared chaotic laser secret communication method in a free space and a communication system thereof, and belongs to the technical field of chaotic laser secret communication. The technical problem to be solved is to provide the improvement of the infrared chaotic laser secret communication method in the free space. According to the technical scheme, the method comprises the following steps that broadband chaotic laser CT (t) is generated through a transmitting laser; a digital signal m (t) is modulated to the current of an information loading laser to obtain a mid-infrared light signal m (t); a receiving laser and the transmitting laser output synchronously through one-way injection, wherein the chaotic laser output by the receiving laser is CR (t); a mid-infrared light signal m (t) is hidden in chaotic laser CT (t) and transmitted to a receiving end through an atmospheric channel, chaotic filtering is used for information demodulation at the receiving laser, obtained recovery information is m '(t)=CT (t)+m (t)-CR (t), and free space chaotic laser secret communication is achieved. The invention is applied to secret communication.

A railway crossing locomotive detection system based on laser scanning disclosed by the invention comprises a system and a laser radar. The system is composed of the laser radar and a locomotive detection algorithm, the laser radar is installed in a railway crossing area, then the area detection range is divided, and the railway crossing is scanned in real time to form dynamic data. A crossing background self-learning algorithm and a locomotive area detection algorithm are adopted to detect crossing locomotive objects, then targets in a scene are extracted from real-time scanning data, the current scanned locomotive objects are identified and classified, and a time state data sequence of the locomotive entering and leaving the crossing is established according to the scanning data; and finally, the running speed of the locomotive is calculated. According to the invention, the problems of few locomotive detection methods, poor detection stability and incomplete functions under the current complex background of the railway crossing are effectively solved, support is provided for full-automatic safe operation of the unmanned railway crossing, and the intelligent level of safety supervision of the railway crossing is further improved.