64results about How to "Improve agricultural production efficiency" patented technology

A multiple robot control architecture including a plurality of robotic agricultural machines including a first and second robotic agricultural machine. Each robotic agricultural machine including at least one controller configured to implement a plurality of finite state machines within an individual robot control architecture (IRCA) and a global information module (GIM) communicatively coupled to the IRCA. The GIMs of the first and second robotic agricultural machines being configured to cooperate to cause said first robotic agricultural machine and said second agricultural machine to perform at least one agricultural task.

A multiple robot control architecture including a plurality of robotic agricultural machines including a first and second robotic agricultural machine. Each robotic agricultural machine including at least one controller configured to implement a plurality of finite state machines within an individual robot control architecture (IRCA) and a global information module (GIM) communicatively coupled to the IRCA. The GIMs of the first and second robotic agricultural machines being configured to cooperate to cause said first robotic agricultural machine and said second agricultural machine to perform at least one agricultural task.

The invention relates to a cultivation and breeding seamless linking circulation mode for promoting ecologic balance. The cultivation and breeding seamless linking circulation mode comprises a planting area, a livestock breeding area, a special cultivation and breeding area and a biological energy production area. Compared with the prior art, the circulation mode provided by the invention is capable of organically combining cultivation, livestock breeding and special cultivation and breeding, wastes such as straw generated in the cultivation industry can be utilized with high values, meanwhile wastes generated in the breeding industry are processed and treated to form an organic fertilizer which can promote the cultivation industry and can be used as a base material for special breeding, effective circulation and seamless linking of cultivation and breeding, the purposes of providing green agricultural products such as fruits and vegetables, pasture, meat, eggs, high-quality animal products and special traditional Chinese medicine materials can be achieved, the agricultural production efficiency can be improved, and the quality of agricultural products can be improved. A mode that companies and farmers are combined can be adopted, a driving effect can be brought into play step by step, and thus good circulation of the mode can be achieved.

The invention relates to a movable intelligent precision farming system, and belongs to the technical field of agricultural equipment. The movable intelligent precision farming system comprises soil measurement equipment, fertilizer distribution equipment, mobile equipment, multimedia equipment and intelligent foliage spraying equipment, wherein the soil measurement equipment, the fertilizer distribution equipment and the intelligent foliage spraying equipment are arranged on the mobile equipment; the soil measurement equipment is a soil nutrient detection spectrum instrument; the fertilizer distribution equipment comprises a fertilizer distribution controller; and the soil nutrient detection spectrum instrument and the fertilizer distribution controller carry out real-time communication through an RS485 communication interface. According to the movable intelligent precision farming system, fertilizers are reasonably matched and used in optimal nutrient combination manner and ratio correspondingly to specific crops at different growth periods of the same crop, so that the maximal benefits are reached with the minimal investment; the pollution to soil caused by the fertilizers is reduced to the maximal extent; the crops are good in mouthfeel, and high in economic benefits; scientific agricultural production is realized; the disease resistance rate and the insect resistance of the crops are reduced; and the dosage of a pesticide for poison is reduced.

The invention relates to scarifying and sowing equipment, in particular to agricultural high-reliability scarifying and sowing equipment, and aims to provide the agricultural high-reliability scarifying and sowing equipment which is high in sowing efficiency, good in scarifying quality and low in labor intensity. In order to solve the technical problem, the agricultural high-reliability scarifying and sowing equipment further comprises a fifth rotating shaft, a fourth bearing pedestal, a first bevel gear, a second bevel gear, a fourth connecting rod, a fifth connecting rod, a first check valve, a water inlet pipe, a piston, a cylinder body, a second check valve, a water outlet pipe and a sprinkler head, wherein the fourth bearing pedestal is arranged on the rear side of the right of a sweep; the fifth rotating shaft is mounted in the fourth bearing pedestal; the right end of the fifth rotating shaft is connected with the first bevel gear; and the second bevel gear is arranged at the rear part of the first rotating shaft. The embodiments described above are merely illustration of preferred embodiments of the invention and are more specific and detailed, but should not be understood as a limitation on the scope of the invention.

The invention belongs to the technical field of agricultural machinery, and particularly relates to a residual film recovery device and an operation method thereof. The device comprises a carrier, a stalk pulling mechanism and a residual film recovery mechanism; the stalk pulling mechanism comprises a stalk pulling wheel, a main stalk pulling wheel, an auxiliary stalk pulling wheel, a cotton stalktransfer wheel set, a first stalk cutting rotor, a second stalk cutting rotor and a cotton stalk collecting and throwing device; the residual film recovery mechanism comprises a film loosening wheel,a soil retaining plate, a film picking wheel, a film brushing transfer wheel and a film collecting box; the stalk pulling mechanism is connected with the front of the carrier, and the residual film recovery mechanism is connected with the rear of the carrier, so that on a cotton field after picking, pulling, chopping and residual film recycling operation of the cotton stalk and the surface and underground residual film can be completed in one time by the carrier, which not only greatly improves the agricultural production efficiency of cotton field post-treatment, but also greatly improves the quality and quantity of the pulling and cutting of the cotton stalk and the residual film recovery.

The invention relates to an agricultural automatic machine, and concretely relates to a numerically controlled agricultural automatic sowing rack. The numerically controlled agricultural automatic sowing rack comprises pedestals, buffering devices, elevating devices, sowing devices and slide bars, and the buffering devices are fixed under the pedestals; each of the buffering devices comprises a telescoping bar, a connecting bar and a buffering spring; the upper segment of the telescoping bar is fixed on the middle portion of the corresponding pedestal, the lower segment of the telescoping bar is hinged to one end of the connecting bar, and the buffering spring is sleeved on the lower segment of the telescoping bar; the elevating devices are used for regulating the height of a medicine spraying device; two ends of each of the slide bars are respectively connected with an elevating platform, the slide bars parallel to each other, and two ends of each of the slide bars are fixed on the corresponding elevating platforms; and the sowing device can slide on the slide bars to cooperate the movement of the integral rack in order to realize dead corner-free medicine spraying. The numerically controlled agricultural automatic sowing rack has the advantages of working after program setting, no artificial intervention, no turning, and realization of one-time completion of sowing of all seeds by setting the length of each of the slide bars to be equal to the width of field.

The invention relates to a plant hydroponic culture method. The method includes steps: stock plant selection, to be more specific, flushing to clean a stock plant, cutting roots, and sterilizing the plant subjected to root cutting; planting, to be more specific, planting the sterilized plant into a matrix; root promoting culture, to be more specific, subjecting the plant planted in the matrix to root promoting culture under appropriate temperature and relative humidity and preset illumination conditions, wherein in a root promoting culture process, nutrient solution is sprayed, and when root system quantity of the plant is larger than or equal to eight, and the length of each root system is larger than or equal to 5cm, root promoting culture is stopped. By the plant hydroponic culture method, utilization of expensive intelligent culture systems in a traditional hydroponic culture process is avoided. In addition, the plant hydroponic culture method is simple and feasible, the plant survival rate can be increased remarkably, production cost in a culture process can be reduced while plant root promoting time is shortened, and accordingly the plant hydroponic culture method is remarkably improved both in terms of cost and economy.

The invention provides a system for adjusting the temperature in a greenhouse. The system comprises a heating device, a ventilation device, a temperature sensor and a microcomputer controller. The heating device is arranged in the greenhouse to increase the temperature of the air in the greenhouse. The ventilation device is installed at the top of the greenhouse and is used for realizing connection between the greenhouse and the air or closing of the greenhouse. The temperature sensor arranged in the greenhouse is used for detecting the temperature inside the greenhouse and transmitting a detection signal to the microcomputer controller; and the microcomputer controller is electrically connected to the heating device and the ventilation device respectively. The temperature sensor is used for monitoring the temperature inside the greenhouse; the microcomputer controller controls the heating device and the ventilation device respectively; and the temperature in the greenhouse is automatically adjusted, so that the growth objective of high quality and high yield of the crops s achieved and the yield and quality of the crops are increased. Therefore, the yield and quality of the cropsare increased; the labor cost of the field management is reduced; the precise agricultural development trend is realized; and thus the system has the broad application prospects.

The invention belongs to the technical field of rice production, and particularly relates to a rice cadmium-reducing agent, a seed soaking solution, a preparation method and a seed soaking method. The cadmium-reducing agent comprises metal salt, and the metal salt is at least one of ferrous sulfate, ferric chloride, ferrous chloride, manganese chloride, manganese nitrate, manganese sulfate, zinc chloride, zinc nitrate and zinc sulfate. When the agent is used for soaking rice seeds, the cadmium absorption capacity of rice can be reduced, and the germination potential of the rice seeds is improved. The metal salt serves as a competitive adsorption particle of heavy metal cadmium and can enter rice seeds in advance during seed soaking, the concentration of competitive metal ions in cells of the rice seeds is increased, and the absorption of cadmium in soil by rice is reduced by competing with cadmium ions for a transport channel in rice root system membrane transport protein. Meanwhile, the metal salt can stimulate the expression of stress-resistant genes in the rice seeds, accelerate the germination of the rice seeds, improve the germination potential and shorten the germination accelerating time of rice.

The invention discloses a maize-straw returning machine. The maize-straw returning machine comprises an operation room, a fertilizing device and a smashing device. A windshield is installed on the left side outside the operation room, a connecting support is installed on the left side of the windshield, a rotational adjusting device is installed in the middle of the connecting support, a camera is installed on the left side of the connecting support, a ventilating device is installed on the operation room, an air conditioning system is installed inside the operation room, a PLC electric control device is installed on the left side of the smashing device, a pushing device is installed in front of the PLC electric control device, a motor is installed inside the smashing device, a transmission rod is installed below the motor, smashing blades are installed on the left side and the right side of the transmission rod, a radiator is installed on the right side of the motor, an oil box is installed on the right side of the radiator, a fertilizing machine is installed inside the fertilizing device, and a fertilizer discharging pipe is installed below the fertilizing machine. The maize-straw returning machine is rapid and convenient to use and wide in application range.

The invention relates to a driver assistant system for a crawler tractor. The driver assistant system for the crawler tractor comprises a display with a built-in inertial navigation unit, a differential positioning device, a rotation speed sensor and a controller, wherein the display, the differential positioning device and the rotation speed sensor are connected with the controller; the display is used for acquiring the attitude information and running path information of the crawler tractor through the inertial navigation unit; the differential positioning device is used for acquiring a satellite differential signal according to the positioning information from a GNSS and the positioning information from a base station; the rotation speed sensor is used for acquiring the rotation speed information of crawlers at two sides of the crawler tractor; and the controller is used for controlling a crawler driving device to adjust the rotation speed of the crawlers according to the attitude information and running path information of the crawler tractor, the satellite differential signal and the rotation speed information from the inertial navigation unit and the GNSS, so as to correct the deviation of the crawler tractor. The driver assistant system for the crawler tractor can improve the accuracy of agricultural machinery operation, reduce operation errors, improve the agriculturalproduction efficiency, reduce the production cost, reduce the fatigue degree of a driver and save the labor force.

The invention relates to a plant protection unmanned aerial vehicle ground monitoring system and a monitoring method thereof, and the monitoring system takes an unmanned aerial vehicle as a carrying platform and machine vision as a core, and carries out the statistics of basic seedlings of a farmland. The monitoring system specifically comprises a map acquisition system for shooting a picture setand splicing the picture set; a region picture processing system which is used for carrying out region marking and preprocessing on the spliced plant protection map; a convolutional neural network system which is used for identifying crops and weeds; and a statistical system which is used for counting the basic seedling number of the crops in the area so as to estimate the whole basic seedling number. According to the method, a plurality of areas are randomly selected from hundreds of mu of farmland through a visual platform carried by an unmanned aerial vehicle for identification statistics,and basic seedling information of the whole farmland is estimated. Picture sequences are collected through a machine vision platform carried by an unmanned aerial vehicle and spliced into a panorama of a target farmland, then basic seedlings in the images are recognized through an algorithm, and statistics is completed.

The invention discloses a high-nitrogen fluid compound fertilizer containing multiple protein fluid nutrient elements and a preparation method thereof. The compound fertilizer comprises 29 to 44 parts of suspending agent, and 71 to 56 parts of nitrogen, phosphate and potash fertilizers, wherein the suspending agent comprises the following components in parts by weight: 2 to 7 parts of hydroxyethyl cellulose, 2 to 5 parts of sodium bentonite and 25 to 32 parts of protein fluid. According to the compound fertilizer, proteins in household garbage and industrial waste materials (fluids) are utilized effectively; and the prepared nitrogen fluid is good in stability and homogeneity and capable of providing a large number of elements and organic nutrients for crops, so that the fertilizer utilization rate is improved. In addition, the compound fertilizer is wide in raw material source, easy in raw material obtainment, multiple in nutrient category, high in nutrient content and good in water solubility, and can be applied to leaf surfaces in a dripping or spraying manner, thereby saving the labor cost and the fertilizer cost for peasants and improving the agricultural production efficiency.

The invention discloses a subsoiler quick assembling / disassembling and adjustment apparatus. The subsoiler includes: a subsoiler body, a left flange plate, a right flange plate, an adjustment handle,a rack, a gear, and a quick assembling / disassembling apparatus. The rack is welded to the front end of the subsoiler body. The left and right flange plates are installed on the two sides of the subsoiler body through the quick assembling / disassembling apparatus. The gear is installed between the left and right flange plates. The adjustment handle passes through the left and right flange plates andare key-connected to a central hole in the gear. The rack is engaged with the gear. By cooperation between the gear and rack, the subsoiler can move up and down; the position of the subsoiler can befixed by means of the quick assembling / disassembling apparatus. Due to the structure, the apparatus can save time and manpower than conventional adjustment modes.

The invention relates to a canvas for harvesting fruits, which is a practical auxiliary tool for agricultural production. The center of the canvas is circular hollow and the periphery of the canvas is octagonal. The circular hollow part is used for sleeving a trunk. A dismountable folding belt is arranged at the right side of the canvas to dismantle the canvas. Buttons in arranged in a column are inlaid on the folding belt to fold and fix the folding belt. Hollow fixed rings are arranged at the top of each corner of the canvas and are mainly used for fixing the edge of the canvas. The canvas is sleeved at the bottom of the trunk of a fruit tree, stretched all around, unfolded and placed on the ground, so that the fruits harvested fall on the canvas directly, instead of being scattered on the ground or in the grass.

The invention discloses a paddy-field fertilizer once applying device. The paddy-field fertilizer once applying device comprises a rotary cultivator. The front end of the rotary cultivator is connected with a tractor through a universal joint assembly, a side plate I is installed on one side of the rotary cultivator, a side plate II is installed on the other side of the rotary cultivator, a fertilizer box is fixed to the upper ends of the two side plates, the rear end of the rotary cultivator is connected with a land wheel through an installing plate, a chain wheel is arranged on the land wheel and is in chain transmission with a duplex chain wheel installed on the side plate I, power is transmitted to a fertilizer box chain wheel upwards by the duplex chain wheel, a fertilizer discharging shaft is driven by the fertilizer box chain wheel to rotate and is evenly provided with a plurality of outer groove wheels wrapped with fertilizer applying boxes respectively, the fertilizer applying boxes are communicated with the fertilizer box, fertilizer conveying pipes communicated with the fertilizer applying boxes are arranged at the bottoms of the fertilizer applying boxes, and the other ends of the fertilizer conveying pipes are communicated with a fertilizer device.

The invention relates to the technical field of agriculture, in particular to a fertilizer picking, mixing and applying machine. The machine comprises a fertilizer picking bin, a applying and mixing bin, a negative pressure generating device, a blowdown valve and a weighing device for weighing the weight of the fertilizer bin, a solid fertilizer inlet and a water inlet are formed in the wall of the fertilizer picking bin, the negative pressure generating device is communicated with the inside of the fertilizer picking bin, the weighing device is placed outside the fertilizer picking bin, a feeding port of the applying and mixing bin and a discharging port of the fertilizer picking bin are communicated through a blowdown pipe, and the blowdown valve is installed in the blowdown pipe. The system can mix a solid fertilizer and water to form a fertilizer solution, thereby achieving the effect of integrated water and fertilizer irrigation, reducing the time of agricultural production, reducing the process of agricultural production and improving the efficiency of agricultural production, and the system can accurately control the amount of fertilizer taken and water taken, accurately control the watering time and the amount of watering, and improve the accuracy of the agricultural production.

The invention discloses a preparation method of an agricultural plastic bowl soft tray material with aging resistance and wear resistance, and belongs to the technical field of high polymer materials.According to the reparation method of the agricultural plastic bowl soft tray material with aging resistance and wear resistance, cultivated seedlings have good quality and are not easily attacked bydiseases, the seedling field ratio can be substantially increased, seedling rising can be promoted to intensive and professional development, the management is convenient, and the seedling raising cost is reduced. The agricultural plastic bowl soft tray material with aging resistance and wear resistance is favorable for reducing labor cost and reducing labor intensity, can be repeatedly used, hashigh and heat resistance, reduces production cost, has good heat stability and ageing resistance, simplifies the planting process, provides powerful measures for cost-saving, yield-increasing and synergistic planting, and has good overall performance.

The invention discloses a biogas slurry humic acid type liquid organic fertilizer and a preparation technology thereof. The biogas slurry humic acid type liquid organic fertilizer comprises the following raw materials by weight: 600-700kg of biogas slurry, 140-160kg of potassium fulvic acid, 95-105kg of potassium nitrate, 18-22kg of magnesium sulfate, 1.5-2.5kg of a regulator, 1.5-2.5kg of zinc sulfate and 95-105kg of sodium humate. The preparation technology of the biogas slurry humic acid type liquid organic fertilizer comprises four steps of bacterium culture and deodorization, precipitation and filtration, deep processing and filling. The technology is simple in equipment, low in cost, easy to operate and intelligent, and human resources are saved. According to the biogas slurry humicacid type liquid organic fertilizer disclosed by the invention, a liquid organic fertilizer is used for replacing a traditional chemical fertilizer to be applied, so that the growth and the development of crops are promoted, the yield and the quality of the crops are increased, the immunity of the crops for plant diseases and insect pests can be enhanced, besides, environmental pollution can be greatly reduced, and the biogas slurry humic acid type liquid organic fertilizer has good popularization and application prospects.

The invention discloses an agricultural soil-turning and fertilizer-applying machine. The agricultural soil-turning and fertilizer-applying machine comprises a base, supporting plates, a lift-drop block, a water tank and a fertilizer tank, wherein the upper ends of two supporting plates are fixedly connected with a top plate; the lift-drop block is arranged between two supporting plates; a vertical adjusting plate is fixedly arranged on the upper surface of a lifting-pressing handle; a plurality of adjusting holes are vertically and equidistantly arranged on the adjusting plate; a position located on the top plate corresponding to an adjusting hole is provided with a fixed pin hole; a soil-turning device fixedly arranged at the lower side of the adjusting block vertically penetrates through and is arranged in a feeding drum; the water tank and the fertilizer tank are fixedly arranged on the base; a motor is arranged on the side surface of the fertilizer tank; stirring blades are arranged on the output shaft of the motor; and a counterweight platform is fixedly arranged on the base. The agricultural soil-turning and fertilizer-applying machine provided by the invention has the following advantages when in use: the functions of fertilizer application, soil turning and watering for soil can be simultaneously completed, so a plurality of purposes are served; uniform application ofa fertilizer is guaranteed, so the fertilizer is convenient to be absorbed by a plant; and the soil-turning device is convenient and rapid to adjust and flexible to use, so agricultural production efficiency is improved, and movement is convenient.

The invention belongs to the technical field of plant genetic engineering, discloses application of a gene LJP1 for controlling the growth period of rice, and particularly relates to cloning, functional verification and application of the gene for controlling the growth period of rice. The nucleotide sequence of the gene LJP1 is shown in a sequence table SEQ ID NO. 1, and the coded amino acid sequence of the gene LJP1 is shown in a sequence table SEQ ID NO. 2. The gene LJP1 determines the basic vegetative growth period and the photosensitivity of rice, and therefore the yield of rice is influenced. The gene is used for creating new germplasm for rice breeding, the planting area and season of rice varieties are enlarged, the yield and quality of rice are improved, and the gene has good application prospects.

The invention discloses a cultivation method for high-temperature-resisting pleurotus pulmonarius. The method comprises the steps of preparation of breeder seeds and mother strains, preparation of cultivated species, spawn running and fruiting management. The high-temperature-resisting pleurotus pulmonarius strains CCMSSC00499 in the national strain conservation center are taken as materials, activated by PDA culture media to be used as mother strains and made into breeder seeds by means of wheat grain culture media, and finally 80-90% of straw, 9-18% part of bran and 1-2% of calcium carbonate are adopted for manufacturing cultivation bags; after conventional inoculation, culture is carried out for 25-35 days at 20-28 DEG C, and then hyphae overgrow on the cultivation bags, and the pleurotus pulmonarius is harvested after culture is carried out for 7-10 days under the temperature being 28-32 DEG C and the relative air humidity being 80-95%. By means of the cultivation method for high-temperature-resisting pleurotus pulmonarius, a new high-temperature cultivation bacterial strain is provided for the edible mushroom industry, and genetic resources are enriched.

An autonomous flight and variable spraying plant protection unmanned aerial vehicle system is used for achieving intelligent monitoring of farmland crops and conducting pesticide spraying according tothe disease conditions of the crops. The system comprises an unmanned aerial vehicle and is characterized by further comprising an installation unit arranged at the bottom of the unmanned aerial vehicle and used for achieving rapid installation and detachment of the unmanned aerial vehicle and accessory parts; the plant protection unmanned aerial vehicle system also has the following parts: a pesticide spraying system arranged on the unmanned aerial vehicle, wherein an adjusting unit is arranged on the pesticide spraying system, and the adjusting unit is used for adjusting the pesticide spraying amount; a pesticide barrel that serves as an accessory part and is connected with the installation unit; a multispectral camera that is used as an accessory part and is connected with the installation unit; and a cloud server that is in signal connection with a communication tower through a 4G network, wherein the communication tower is in wireless communication with an on-site ground stationthrough WIFI, the communication tower is in signal connection with a radio station ground end, and the radio station ground end is in wireless communication with the unmanned aerial vehicle. The plantprotection unmanned aerial vehicle system can perform pesticide spraying according to disease conditions.

The invention discloses a lens, which comprises a first curve, a second curve and a third curve, wherein an expression of the first curve is as follows: y1=a10++a11x1+a12x1<2>+a13x1<3>; an expressionof the second curve is as follows: y2=a20++a21x2+a22x2<2>+a23x2<3>+a24x2<4>+a25x2<5>+a26x2<6>; an expression of the third curve is as follows: y3=a30++a31x3+a32x3<2>+a33x3<3>+a34x3<4>; the first curve, the second curve and the third curve are all of a rotating array structure about a central axis; lofting is carried out by taking a first contour boundary line and a second contour line as contour boundary lines to obtain a first single body; the first single body is symmetrically overturned by taking H as an axis to obtain a second single body; the second single body takes the central shaft asa circle center annular array, the angle of the array is 90 degrees and a square lens body is obtained; the plane where the first curve is located is an incident plane, and the plane where the secondcurve and the third curve are located is an emergent plane; and the lens main body enables light rays to enter from the incident surface and exit from the emergent surface to form a square irradiationsurface. The square lens is used for supplementary lighting in the field of plant growth, so that a lighting region is matched with a crop planting region, and the benefit of agricultural productionis improved.

The embodiment of the invention provides an operation dose determination method and device, unmanned equipment and a storage medium, and belongs to the technical field of unmanned equipment. The method comprises the steps: obtaining the crop information of a to-be-operated plot; collecting at least one of environment information and medicament information when the unmanned equipment works; and according to at least one of the environment information and the pesticide information and the crop information, determining a target pesticide dosage corresponding to the to-be-operated land parcel. According to the embodiment of the invention, the calculation dimension of the medicament dosage during unmanned equipment operation is increased, the accuracy of the medicament dosage calculation process during unmanned equipment operation is improved, and the agricultural production efficiency is improved.

The invention relates to a preparation method of a fully-degradable film, in particular to a preparation method of a fully-degradable seed film added with straw powder, which comprises the following specific preparation steps: crushing the straw powder to 500-800 meshes, and drying until the water content is lower than 3% for later use; esterifying and modifying the straw powder by using an esterifying agent; weighing 35 to 40 parts by mass of the esterified straw powder, 3 to 5 parts by mass of a plasticizer, 3 to 5 parts by mass of a compatibilizer and 0.05 to 0.1 part by mass of an antioxidant; extruding the mixture obtained in the step 2 by using a double-screw extruder; after being extruded, performing blowing traction on the material by a motor according to a fixed proportion, wherein the blowing ratio is the transverse expansion multiple of the film; and cooling the film to the room temperature through a fan air ring after being blown up and drawn, and winding the cooled film by a winding machine after being split by a double-side splitting knife. The cost is reduced, the strength of the degradable film is improved, breeding and rice transplanting are combined, and the agricultural production efficiency is improved.

The invention provides a crop height measuring method and a plant protection machine gear adjusting method and device. The crop height measuring method is applied to a height measuring system, the height measuring system comprises a laser head used for emitting laser rays and a camera used for obtaining images, and the method comprises the steps that when the laser head is started, the camera is started; when the laser head is turned off, a first farmland image containing crops is obtained through the camera, and when the laser head is turned off, a second farmland image containing crops is obtained through the camera; a maximum offset pixel coordinate of a laser ray position relative to a horizon line is determined according to the first farmland image and the second farmland image; a crop height measurement model is determined according to the maximum offset pixel coordinate; and the height of the crop is measured through the crop height measurement model. The height of the crop is measured based on image detection, the manual intervention degree and the labor intensity are reduced, the height of the crop can be intelligently measured, and the efficiency and the reliability of crop height measurement are improved.