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101results about How to "Easy to operate in the field" patented technology

Single-phase earth fault positioning device for electrical power distribution network

The invention disclose a new positioning method of a distribution network single-phase earth fault, which is applicable to a 3-60 kV neutral point ineffective earth grid. The principle of the positioning method is that: firstly, a high-voltage DC signal is poured into a circuit starting end and the DC signal is detected along the circuit so as to determine a fault area; then a high-voltage AC signal is poured into the circuit starting end, and the AC signal is detected along the circuit so as to determine the position of a fault point. A positioning device developed on the basis of the invention consists of two parts: a high-voltage signal source and a signal detector, wherein, the high-voltage signal source consists of a voltage inverter, a constant flow source, a transformer and a rectifier bridge and is used for pouring a high-voltage DC signal and a high-voltage AC signal; the signal detector comprises a DC detector and an AC detector, wherein, the DC detector consists of a Hall DC detector, a Bluetooth wireless sender and a Bluetooth wireless receiver and is used for measuring the DC signal; while the AC detector consists of an AC electromagnetic field inductor and a signal processing and display segment and is used for measuring the AC signal. The method and the device have mature technique and high reliability.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2

Method for reshaping pear trees

InactiveCN101836563AShaping and pruning technical requirements are simpleHigh speedCultivating equipmentsHorticulture methodsFruit treePear tree
The invention discloses a method for reshaping pear trees, relating to a method for reshaping fruit trees and comprising the following steps: (1) determining reasonable plantation density, wherein appropriately, the line spacing is 4m and the row spacing is 5-6m; (2) formulating an overall objective for culturing tree shapes, controlling the trunk height of a pear tree to be 0.7-0.8m and the distance away from the ground to be 0.8m, allocating two boughs along a progressive direction, and inducing horizontally; and allocating lateral branches at the two sides of the boughs, performing line spacing inducement through a mode for forming a dip angle of 45 degrees with the horizontal plane, and controlling the spacing between lateral branches to be 0.4-0.5m; (3) realizing tree shape culture by the steps of bough culturing and inducing, and reasonable allocating and trimming of lateral branches; and (4) constructing a framework adaptive to labor-saving reshaping, wherein the pear trees are V-shaped and U-shaped. The invention has the advantages as follows: (1) the reshaping technology has simple requirements and rapid speed; (2) the field operation is easy and has high efficiency; (3) the expansion of operation to an appropriate scale per capita is possible; and (4) the early-stage yielding ability is good.
Owner:ZHENJIANG AGRI SCI INST JIANGSU HILLY AREAS

Air gun array earthquake source three-dimensional space combination method for offshore earthquake exploration

InactiveCN103454672AIncrease the initial bubble ratioSuppression of notchingSeismologyEngineeringLarge capacity
The invention relates to an air gun array earthquake source three-dimensional space combination method for offshore earthquake exploration. The method comprises the steps of determining the total capacity of an air gun array earthquake source, and the number of subarraies, determining the capacity of each subarray and the capacity of each subarray unit in each subarray, determining the relative positions of large capacity air guns and small capacity air guns, determining the positions of all the subarraies in an air gun array, determining the optimal immersing depth of the air gun array, selecting air gun array plane arrangement parameters corresponding to simulating wavelets meeting exploration requirements, determining the optimal three-dimensional space combination mode of the air gun array and related parameters of the immersing depth of upper sources and the lower sources and the like, so that a delayed simulating three-dimensional space combination stereoscopic air gun array earthquake source can be obtained, and the delayed simulating three-dimensional space combination stereoscopic air gun array earthquake source is final air gun earthquake source three-dimensional space combination for offshore earthquake exploration. The air gun combination arrangement mode designed through the air gun array earthquake source three-dimensional space combination method is distinct in gradation, the optimal air gun combination arrangement mode is provided for different construction conditions and different offshore exploration environments, and therefore optimal far field wavelets in the current environment can be obtained. The air gun array earthquake source three-dimensional space combination method for the offshore earthquake exploration can be directly used in the outdoor offshore earthquake exploration process.
Owner:CHINA NAT OFFSHORE OIL CORP +3

Power transmission and transformation system fault searching locating instrument and searching method

The invention relates to an electric power circuit fault detect device and detecting method, in particular to a power transmission and transformation system fault searching locating instrument and a searching method. The locating instrument comprises a host, a host accessory and a monitor. The host and the monitor are connected through the host accessory. In a test, a signal source outputs high-voltage signals to an electric power circuit grounding phase to break down a grounding point, and the grounding point is maintained in a grounding state through constant currents. The currents flow along the grounding phase of a grounding circuit and enter the ground through the grounding point, and a closed loop is formed with the ground. The signal monitor tracks the signal currents of the grounding circuit. Several important points are measured along the circuit with a bipartition method, and by detecting changing of the injected signals, the accurate positions of a grounding branch and the grounding points can be determined smoothly. The power transmission and transformation system fault searching locating instrument and the searching method have the advantages the positions of fault points can be accurately determined, rod ascending checking rod by rod is of no need, working efficiency is improved, and labor intensity is lowered.
Owner:CHINA PETROLEUM & CHEM CORP +1

New method for surveying population density of microarthropods such as panonychus citri mcgregor, predatory mites and diaphorina citri kuwayama

The invention discloses a new method for surveying population density of microarthropods such as panonychus citri mcgregor, predatory mites and diaphorina citri kuwayama. The new method comprises the following steps of: randomly drawing a citrus sample plant; placing adhesive plate boxes below tree crowns in the east, south, west and north directions of the tree crown of the citrus sample plant; knocking branches of the tree crowns above the positions where the adhesive plate boxes are arranged for many times to drop the microarthropods; adhering the microarthropods falling in the adhesive plate boxes to adhesive plates of the adhesive plate boxes; collecting the adhesive plate boxes to perform statistical survey, wherein the adhesive plate boxes comprise box bodies; a layer of plate corresponding to the size of the bottom surface is arranged on the bottom surface of each box body; an adhesive material is coated on the upper surface of the plate; and thus, the adhesive plates are constructed. Thus, by surveying with the method provided by the invention, the used time is less, the sample can be stored for a long time, and most importantly, the detection sensitivity to the microarthropods of red spiders, predatory mites and the like is greatly improved; and since the detected objects are adhered and cannot escape, the detection is more convenient, simpler and more accurate.
Owner:GUANGDONG ENTOMOLOGICAL INST

Crystal grape slope TU shape pruning technology

ActiveCN104160911APromote stout growthNeat tree shapeCultivating equipmentsBudCell budding
The invention discloses a crystal grape slope TU shape pruning technology. Seedlings in the current year are planted, and short seedling segments are reserved. After sprouting, two young sprouts are selected and remained; after the two sprouts grow up, one strong branch serves as the main vine and is guided to spread onto a trellis through an inserted rod in a stretched mode, the weak branch is removed, pinching is carried out on the main vine after the main vine grows up to form a trunk, two accessory buds are cultivated on two upper knots and used as main branches after pinching, the other accessory buds are removed, and grape tendrils are removed too. The two main branches grow towards the two sides in the horizontal direction of a slope, then are guided upwards along the slope in the direction perpendicular to the horizontal line of the slope, are subjected to binding cultivation, and then are subjected to pinching. Secondary accessory buds growing at knot axils of the main branches are all reserved, leaf remaining and pinching are carried out on all the secondary accessory buds, and the secondary accessory buds are bound. Crystal grape branches and tendrils in a mountainous region do not overlap or overlap slightly after pruning, the steps of pruning, branch binding, pinching, bud removing, bagging, picking and the like are simple and fast, labor and time are saved, tree vigor is strong, the tree form is stable and standard, fruit clusters are large and orderly, products are high in commodity, and the yield is easy to control.
Owner:三都水族自治县葡萄研究所 +1

Method for planting cured tobacco in hot area from May to September

InactiveCN102057830ASolve the problem of disputed landNo planting timePlantingClimate change adaptationHot zoneEconomic benefits
The invention relates to a method for planting cured tobacco in a hot area from May to September, belonging to the technical field of agriculture. The invention not only develops the technology, but also cooperates with a reasonable cultivation mode for cultivation, thereby effectively solving the problem of insufficient temperature in winter planting technology. The method for planting cured tobacco in a hot area from May to September is used for researching planting altitude, planting density, seedling raising modes, nitrogen application amount, antifreezing measures, irrigation regime, and the number of days for reserving tobacco, thereby solving the technical problems of land area shortage, and confliction between the hot-area cured tobacco planting technology from May to September and the climate from October to next April. Meanwhile, the cured tobacco is planted below the film instead of above the film, and idle soil in winter is utilized to develop the method for planting cured tobacco in a hot area from May to September, thereby increasing the land-use ratio and enhancing the economic benefit of farmers. The method for planting cured tobacco in a hot area from May to September has the advantages of less investment, high effect taking speed, high yield, high efficiency and the like, and can be used for large-scale production.
Owner:云南省烟草公司保山市公司

Metro shield tunnel forming tunnel portal measurement method

The present invention discloses a metro shield tunnel forming tunnel portal measurement method, which comprises: 1, field data acquisition: 101, selecting measurement points, wherein M measurement points are selected on the inner edge of the tunnel portal to be measured according to requirements, and 102, measuring the measurement point position, wherein three-dimensional coordinates of each measurement point are measured, and measurement results are recorded; and 2, indoor data processing: 201, calculating the distance between each measurement point and the center line of the design path, and comparing the difference value, 202, calculating the end wall offset and the flatness, and 203, comparing the fitting tunnel portal center and the designed tunnel portal center, wherein the process comprises projecting, projection point grouping, circle fitting, fitting tunnel portal center point acquiring, tunnel portal center fitting precision calculating, and tunnel portal center offset acquiring. The metro shield tunnel forming tunnel portal measurement method has characteristics of simple step, reasonable design, easy achieving and good use result, and problems of high labor intensity, probable forming tunnel portal plane deviation calculating, and poor use effect of the existing tunnel forming tunnel portal measurement method can be solved with the metro shield tunnel forming tunnel portal measurement method of the present invention.
Owner:URBAN RAIL TRANSIT ENG CO LTD OF CHINA RAILWAY FIRST GRP CO LTD +1

Method for utilizing angle gauge to measure forest stand crown density

The invention discloses a method for utilizing an angle gauge to measure forest stand crown density and belongs to forest resource survey methods. The method is characterized in that the angle gauge serves as a tool, by adopting an angle gauge counting survey method and measuring a diameter at breast height of each counted tree, diameter class distribution per hectare is obtained, the plant number of each diameter class per hectare in a forest stand can be calculated, corresponding crown breadth values of trees of each diameter class are found out according to an established unary diameter crown table, and the forest stand crown density of a surveyed area can be obtained through a crown density principle. The advantages that the angle gauge is light, convenient, flexible and low in cost are fully utilized, cost of field survey is reduced, and efficiency of office work treatment and field operation of the forest stand crown density is improved. By establishing the unary diameter crown table taking various crown breadth influence factors into account, calculating precision of the forest stand crown density is greatly improved, and the shortcomings that in previous forest stand crown density survey, the precision is low if methods are simple, and the process is complex if the precision is high are overcome.
Owner:BEIJING FORESTRY UNIVERSITY

Umbrella opening type quick release nose cone for small/medium-sized unmanned airship

The invention discloses an umbrella opening type quick release nose cone for a small / medium-sized unmanned airship. The nose cone comprises a cone cap, a pipe joint and multiple support rods, wherein a nose cone mooring hole is formed in the front section of the pipe joint, a tying hole is formed in the middle, and two circles of connecting rings with different declination angles are arranged at the rear part; each of a front cone cap and a rear cone cap is a head-hollowed conical structure machined by adopting a metal sheet, the inner ends of the front and rear cone caps are fixedly connected with the two circles of connecting rings at the rear part of the pipe joint through rivets respectively, and the outer ends of the front and rear cone caps are riveted and formed through rivets; the multiple support rods are bent into an umbrella structure fitting the outer contour of the head of an airbag of the airship, the rear ends of the support rods are detachably and fixedly connected with an airbag body of the airship, and the front ends of the support rods are detachably and fixedly connected with a fixing device on the outer wall surface of the cone cap. Compared with an existing nose cone structure, the nose cone has the advantages of light weight, simple structure, convenience and easiness for disassembling and convenience for outfield operation; the number of the support rods is regulated according to the magnitude of a load to bear force in multiple directions and achieve high adaptability.
Owner:CHINA SPECIAL TYPE FLIER RES INST

Evaluation screening method and evaluation operating process for chlorine-containing disinfectants

The invention relates to an evaluation screening method and an evaluation operating process for chlorine-containing disinfectants. The evaluation screening method for chlorine-containing disinfectants comprises the following steps of: adding potassium iodide into a chlorine-containing disinfectant to be determined, so that the potassium iodide is oxidized and iodine is separated out; through taking starch as an indicator, carrying out titration by using a standard sodium thiosulfate solution; and calculating the initial chloride equivalent according to the consumption of the standard sodium thiosulfate solution. In the process of determining, the potassium iodide is directly added into the chlorine-containing disinfectant to be determined, so that the potassium iodide is oxidized and iodine is separated out, and the potassium iodide is not oxidized under the condition of adding an acid into the disinfectant. The operating process of implementing the evaluation method comprises the steps of adding a plurality of KI powder into a quantitative disinfectant to be determined, carrying out titration by using standard sodium thiosulfate, and calculating the initial chloride equivalent according to the consumption of the standard sodium thiosulfate. By using the evaluation screening method and operating process disclosed by the invention, the initial chloride equivalent of a disinfectant can be rapidly determined. The stability and storage capacity of a disinfectant and the initial reaction capacity (closely relevant to a spray disinfection method) of the disinfectant are evaluated by using the chlorine equivalent, thereby solving the problem of evaluation index distortion caused by separately using available chlorine.
Owner:中国人民解放军69081部队防化修理所

Measuring and reading device for a water and soil erosion survey pin and using method thereof

The invention discloses a measuring and reading device for a water and soil erosion survey pin. The measuring and reading device comprises a movable outer barrel and a guide inner barrel arranged inside, which are in sliding connection, wherein a limiting top cap is arranged above the top end of the guide inner barrel; a back cover is arranged at the bottom end of the guide inner barrel; the guide inner barrel and the movable outer barrel are equal in length; scales are formed in the guide inner barrel; the outer diameter of the guide inner barrel is greater than the outer diameter of the survey cap. The invention further discloses a using method for the measuring and reading device for the water and soil erosion survey pin. The measuring and reading device has the characteristics of being operated outdoors, capable of avoiding artificial interferences, accurate in reading, simple in structure, easy to grasp, low in using cost, reliable in performance, and the like. Compared with the conventional survey pin with the scales, the measuring and reading device can be used for overcoming the defects that the scales on the survey pin are easy to peel off, the rust corrosion is polluted, the reading is difficult, the efficiency is low, the requirements for the survey pin processing process are high, the cost is high, and the like.
Owner:TIANJIN UNIV

Microfluidic paper chip, preparation method thereof, microfluidic paper chip detection system and application

The invention provides a microfluidic paper chip, which comprises a sample introduction area and a detection area, wherein the sample introduction area and the detection area are hydrophilic areas, and the periphery of the sample introduction area and the detection area is a hydrophobic area; the sample introduction area is positioned on one side of the paper chip, and the detection area is positioned on the other side; and the sample introduction area can penetrate through the paper base to penetrate through the other side of the paper chip to form a filtrate area, and the filtrate area enables filtrate to flow to the detection area in a contact mode or a non-contact mode. The invention further discloses a method for preparing the microfluidic paper chip and a detection system based on the microfluidic paper chip, and the system is applied to detection of components of food, vegetables, traditional Chinese medicinal materials and blood samples. The paper chip disclosed by the invention is simple and convenient to use, low in cost and more suitable for detecting substances with relatively small sample quantity. When a sample injection solution is ionized and sprayed, a signal entering a mass spectrometer is stronger, and the detection precision is higher. During detection operation, pollution can be prevented, the accuracy of detection data is ensured, and the mass spectrometer is prevented from being damaged.
Owner:HUNAN NORMAL UNIVERSITY

Wireless synchronous collecting system

The invention relates to a wireless synchronous collecting system which comprises a center node and at least one node. The center node comprises a PC host and a wireless transceiver, and wireless collectors serve as the nodes. The PC host sends sent orders to the wireless transceiver through a USB interface, the wireless transceiver converts the orders into frequency modulation carrier waves and transmits the frequency modulation carrier waves out, and after frequency modulation signals received by the wireless transceiver are demodulated into serial codes, the serial codes are sent back to the PC host through the USB interface; the wireless collectors receive synchronous triggering orders sent by the wireless transceiver, collect data of sensors arranged on a bridge at the same time, process and store the data, receive data calling orders of the center node and then conduct data transmission. Wireless control and wireless real-time transmission are conducted, the collecting precision is high, errors of real-time collection and transmission due to interference are avoided, the defect that a large amount of cables are laid, and consequently the workload is large is overcome, an internal power source and an external power source can be selected for power supply, field operation is convenient, and the wireless synchronous collecting system is an ideal wireless measuring tool.
Owner:SHANGHAI INST OF TECH

Outdoor shaft sleeve pulling and pressing device for excavators

The invention discloses an outdoor shaft sleeve pulling and pressing device for excavators and belongs to the field of machinery manufacturing. The outdoor shaft sleeve pulling and pressing device comprises a power assembly (3), a support part (4) and a sleeve part (5). A shaft sleeve (1) is arranged in the shaft hole of a shaft (2). The power assembly (3) comprises a power mechanism (6), a cylinder (7) and a piston rod (8). The power mechanism (6) drives the piston rod (8) to extend out or retract into the cylinder (7). The support part (4) is connected with the cylinder (7), and the sleeve part (5) is connected with the other end of the piston rod (8). A first acting plane (9) acting with the shaft (2) is arranged on the support part (4), while a second acting plane (10) acting with the shaft sleeve (1) is arranged on the sleeve part (5). When the piston rod (8) extends out or retracts into the cylinder (7), the direction of force that the first acting plane (9) applies upon the shaft (2) is opposite to that the second acting plane (10) applies upon the shaft sleeve (1). By the arrangement that the shaft sleeve is pressed out by exerting force upon the cylinder and the piston rod in the opposite direction, greater convenience is brought to outdoor operation, with no need for carrying larger power sources, thus the outdoor shaft sleeve pulling and pressing device can save both time and labor, and damage to the shaft hole is less.
Owner:SHANGHAI SANY HEAVY IND

Frequency domain electromagnetic exploration method for acquiring resistivity based on horizontal electric field and magnetic field

The invention discloses a frequency domain electromagnetic exploration method for acquiring resistivity based on a horizontal electric field and a magnetic field. The method comprises the following steps of S1, arranging an observation device, wherein the observation device comprises a transmitter, two power supply electrodes A and B, a measuring point provided with a measuring electrode, and a receiver capable of simultaneously observing the electric field and the magnetic field; S2, enabling the observation device to work normally, receiving an electromagnetic response signal fed back by the measuring point by the measuring equipment, and sending the electromagnetic response signal to a processing device; and S3, the processing device calculating apparent resistivity of different frequencies of the position where the measuring point is located according to the electromagnetic response signal, and the stratum information being obtained through qualitative analysis and quantitative calculation. As the method has no orientation limitation on an electric field and a magnetic field, wide-azimuth electromagnetic ground detection can be realized, and field construction efficiency is greatly improved; and secondly, the apparent resistivity is strictly defined based on an electric field and magnetic field component formula, so the geoelectric information can be accurately reflected, and the influence of the field source emission efficiency on electromagnetic sounding can be eliminated.
Owner:CENT SOUTH UNIV
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