92results about How to "Improve collection accuracy" patented technology

The invention specifically provides a method for monitoring plant growth by using an unmanned aerial vehicle with a multispectral light source, belonging to the technical field of monitoring of plant growth. The method comprises the following steps: determining the characteristic wavelengths of plants according to the species of the plants and selecting a corresponding standard narrowband colored light combination as a standard multispectral light source; irradiating the plants with the standard multispectral light source, acquiring information like the chromaticity coordinates and reflection spectra of the plants of different species and establishing a plant spectrum database; controlling the unmanned aerial vehicle to shoot a detected plant by using an area-array CCD spectral imager and to store information; and comparing the information of the shot detected plant with information like the chromaticity coordinates and reflection spectra of leaves of a plant of a same species in the plant spectrum database so as to analyze the growth condition of detected leaves. According to the invention, the unmanned aerial vehicle carries the multispectral light source and the area-array CCD spectral imager for monitoring, so the coverage area of a single scanning is great and measuring precision is high; the unmanned aerial vehicle is simple in flight route, easy to control and low in cost; thus, the method is applicable to monitoring of plant growth during current agricultural plantation in fields, greenhouses, plant factories, etc.

The invention discloses a public-sentiment analysis method and system, computer equipment and a storage medium for behaviors of utilizing internet marketing activities to exchange low costs, or even no cost, for high rewards. The public-sentiment analysis method includes: S101, searching for and reading web page files through a web crawler according to a predefined searching strategy, and extracting public-sentiment data from the web page files; S102, filtering the extracted public-sentiment data to remove junk information; S103, arranging and classifying public-sentiment data after filtering;S104, analyzing public-sentiment data in each classification result; and S105, displaying and outputting public-sentiment analysis results, which are obtained through S104, in forms of charts and reports. The public-sentiment analysis system includes a crawler module, a filtering module, a classification module, an analysis module and a display module. According to the method and the system, precision of data collection and accuracy of public-sentiment analysis are improved, and risk points can be effectively processed as early as possible through proactively sensing risks.

The invention provides an integrated multimedia teaching system which comprises a base, a support box, a workbench a teaching host computer, wherein a power supply device and a sound box are arranged in the support box; a mounting groove is formed at one side of the upper surface of the workbench; a groove is arranged at the bottom of the mounting groove; a foldable high-shooting instrument is arranged in the groove; a foldable connecting rod is arranged on the other side of the upper surface of the workbench; an object exhibition device is connected with the foldable connecting rod; the teaching host computer is embedded in the upper surface of the workbench; a remote teaching module is arranged on a chassis; the remote teaching module comprises a central control device and a plurality of studying devices and a data transmission module which are connected with the central control device. The multimedia teaching, video/audio playing, courseware making, recording and broadcasting and remote teaching are integrated in the multimedia teaching integrated system, the remote real guide and the network resource downloading can be realized through a remote teaching module, and the interactivity of the multimedia teaching can be enhanced by an interaction switching module.

The invention discloses a fully-automatic drilling machine. The fully-automatic drilling machine is provided with a drilling machine supporting platform and a drilling machine main supporting column; a dust-collecting drawer is arranged in the drilling machine supporting platform and a negative-pressure fan is arranged on one side of the dust-collecting drawer; a dust-collecting net is arranged above the dust-collecting drawer; an objective table is arranged above the drilling machine supporting platform; a longitudinal sliding groove is formed in the drilling machine supporting platform; and the drilling machine main supporting column is arranged above the longitudinal sliding groove. The fully-automatic drilling machine can synchronously collect harmful substances such as dust particles generated by drilling in the drilling process, improve the workshop environment, protect physical and psychological health of workers and be beneficial to environmental protection; a laser receiving and transmitting device can accurately position the drilling position by utilizing laser; and a positioning sensor device is arranged in a drilling device, so the drilling positioning precision is improved, the drilling quality is guaranteed, drilling operation can be conducted effectively by the device instead of manual power, and the drilling efficiency is improved.

The invention belongs to the technical field of monitoring systems, and discloses a system for monitoring safety of building construction based on Internet of Things. The system is characterized in that an unmanned aerial vehicle monitoring module, a human body life feature detection module and a positioning module are respectively connected with a data collection module through circuit lines; thedata collection module is connected with a main control module through a circuit line; the main control module is connected with an alarming module and a wireless communication module through circuitlines; and the alarming module is connected with the wireless communication module through a circuit line. The system has the advantages that the whole building site can be flexibly monitored by theunmanned aerial vehicle monitoring module; human body life information can be obtained by the human body life feature detection module; a specific position of a worker can be obtained by the positioning module; when an accident occurs, a rescuing person can timely and quickly perform rescue; the accuracy of positioning data can be greatly improved by an adopted positioning algorithm.

The invention relates to a highway survey investigation internal and external work integrated system based on a mobile intelligent platform, and belongs to the technical field of highway engineering information collection. The system comprises a client and a server. The client comprises a mobile client based on a mobile intelligent tablet device and a Web client based on a PC browser. The mobile client is used in field process to perform data collection, and the Web client is used in the interior work to perform data processing and application; and by adoption of the system provided by the invention, paperless and regulation data collection of highway survey external work investigation, efficient and unified data application in internal work investigation, and intelligent and cooperative data communication application of internal and external work investigation data are realized, and the existing related working modes and working efficiency are greatly improved.

The invention relates to a plant moisture detection method and system. The plant moisture detection method comprises the following steps of collecting an image of a to-be-detected plant by use of image collecting equipment to obtain an initial image; identifying a target blade image from the initial image; determining a current shooting angle of the image collecting equipment according to length and width sizes of the target leaf image; adjusting the shooting angle of the image collecting equipment so that the shooting angle of the image collecting equipment is the same as a shooting angle formed by collecting a standard sample blade or is within a set angle threshold value; and collecting the image of the to-be-detected plant again by use of the image collecting equipment and obtaining the target blade containing image. With the method, the image collecting precision can be effectively improved, the high-quality image is obtained, the subsequent image processing and analysis process can be effectively simplified, the efficiency is improved and more accurate blade moisture content data are beneficially obtained.

The invention relates to a keyword-based oriented webpage collection method. The method comprises the steps of introducing a text weighting algorithm to set a weight for a keyword; calculating a webpage theme relevancy in combination with a spatial vector model algorithm; judging the importance of a webpage by use of a webpage link structure and the theme relevancy; gathering related subject webpage files according to a text clustering algorithm; calculating a probability of a to-be-grabbed webpage which belongs to the subject theme by use of a naive bayesian algorithm; setting a fitness function and screening a webpage related to the theme; and dynamically adjusting a system model according to the real-time crawling situation of the webpage. Based on a distributed platform, the oriented crawling of the theme webpage is realized by use of an adaptive theme algorithm in combination with an open source network collection architecture; parallel webpage crawling is realized by use of a distributed technology, each node calculation resource is fully utilized and the crawling rate of the webpage is improved.

The invention relates to the field of power equipment monitoring, in particular to a power transmission pole tower leakage current-based fault positioning device and positioning method of a power transmission line. The fault positioning device is characterized by comprising positioning equipment and a positioning system, wherein the positioning equipment is arranged on a power transmission pole tower grounding conductor, the positioning system is arranged in an upper computer, the positioning equipment is used for presetting a geographic position parameter, acquiring a current signal of the power transmission pole tower grounding conductor, pre-processing the current signal, extracting an effective value, forming current data and transmitting the current data to the positioning system, thecurrent signal comprises a pole tower leakage current and a pole tower lightning current, the positioning system is used for analyzing size, frequency and waveform characteristics of the current data, judging whether the current data is a fault current or not and determining a fault position according to the positioning equipment which detects the fault current, and the positioning current comprises database and a positioning unit. The fault positioning device is high in positioning accuracy and is convenient to install and maintain.

The invention discloses a payment system and method, which relate to the technical field of payment. A power supply module is electrically connected with the mains supply and is electrically connectedwith a main control module; an information acquisition module is electrically connected with the main control module; the information acquisition module is used for acquiring audio information and image information and transmitting the acquired information to the main control module; a communication module is electrically connected with the main control module and is in communication connection with a backstage database; the main control module controls the working state of the information acquisition module; the main control module is also used for processing the audio signals and the videosignals, a facial feature P, a voiceprint feature X and a voice command Y are extracted from the signals, numbers in the voice command Y are extracted, information comparison is carried out through the backstage database, and a payment process is completed. In comparison with the prior art, the system and the method have the advantages that the payment is simple, convenient and safe, the information acquisition accuracy is high, and cloud-end resources can be saved.

The invention discloses a camera system capable of obtaining a color license plate by infrared laser lighting. The system comprises an infrared laser emission device, an image acquisition device and acontrol module, wherein the infrared laser emission device comprises an infrared laser source and a beam converter, the beam converter is placed between the infrared laser source and a target licenseplate, the target license plate is connected with the control module through the image acquisition device, and the control module is also connected with the infrared laser emission device, the infrared laser source emits an infrared laser beam, and the infrared laser beam is subjected to laser beam spot adjustment through the beam converter, then is enlarged into a beam spot bigger than the sizeof the target license plate and irradiates on the target license plate; and the image acquisition device acquires image information from the target license plate and sends the image information to thecontrol module. The system provided by the invention has the advantages of using the infrared laser beam, being free from influence of environment visible lights and generating no light pollution since the infrared laser beam is invisible to human eyes, thus, the accuracy rate of image acquisition of the system is high.

The invention provides an intelligent agricultural machine terrain detection and motion control method, which is used for enabling an intelligent agricultural machine to clamp a terrain and control the movement of the terrain according to a detection result. The method comprises the following steps of: obtaining a distance between a stop place and a working place as a travel road section; collecting the terrain on a driving road section; and setting the travel speed and the travel route according to the terrain and the travel distance on the travel road section 20.

The invention discloses a plug-and-play method for power distribution Internet of Things end-side equipment based on HPLC communication and belongs to the technical field of power distribution. The method comprises the following steps: step A, plug-and-play end-side equipment is installed on site; B after the end-side equipment is powered on and is scanned and found by a transformer area intelligent fusion terminal, the transformer area intelligent fusion terminal collects information of the end-side equipment; and C, the transformer area intelligent fusion terminal generates a model file of the end-side equipment according to the information of the end-side equipment, and uploads the model file to the master station system through an MQTT protocol or an IEC104 mode. The method has the advantages that plug and play of the end side equipment can be achieved, data transmission between the end side equipment and the transformer area intelligent fusion terminal is achieved through HPLC communication, and the problems that at present, breakers and branch monitoring terminals of the end side equipment of a power distribution transformer area are various, and models are not uniform are solved.

The invention provides a fabric electrode and an intelligent electrocardiograph. The fabric electrode comprises hydrophilic conductive cloth and a liquid storage structure for wetting hydrophilic fiber, wherein the hydrophilic conductive cloth is formed by knitting conductive fiber and hydrophilic fiber, and the liquid storage structure is in contact with the hydrophilic conductive cloth. When thefabric electrode is used, the liquid storage structure stores liquid, and the hydrophilic conductive cloth is provided with the hydrophilic fiber, so that the hydrophilic fiber can automatically absorb the liquid in the liquid storage structure, it is ensured that the surface of the hydrophilic conductive cloth is always wet in dozens of hours, and then good conductive contact between the hydrophilic conductive cloth and the skin is ensured. Therefore, the electrode signal acquisition accuracy is improved, meanwhile the fabric electrode doses not need to be wetted repeatedly and is convenientto use. In addition, the fabric electrode provides stable signals and is few prone to the influence from pressure and skin state.

A cloud particle collector comprises a shell, and an airflow channel is formed in the shell. The collector is characterized in that the airflow channel comprises an air inlet channel and an inclined channel communicated with the tail end of the air inlet channel and arranged obliquely, the air inlet channel is arranged in the horizontal direction, and a 45-degree included angle is formed between the inclined channel and the horizontal plane. The beneficial effects of the invention are that as the air inlet channel is arranged in the horizontal direction, therefore, airflow cannot form a largeamount of turbulent flow, particles in the airflow cannot collide with one another under the action of the turbulent flow to be agglomerated or split, the size of the particles cannot be increased ordecreased, and the distribution density of the particles, located outside the airflow channel and entering the airflow channel, in the airflow cannot be obviously changed. Therefore, the distributiondensity and the volume of the particles outside the airflow channel are basically consistent with those of the particles in the airflow entering the airflow channel.

The invention relates to the field of electrospinning micro-nano manufacturing, in particular to a preparation device of a multilayer microstructure fiber based on near-field electrospinning direct writing. The preparation device comprises an injection pump, an injection needle tube, an electrospinning needle head, a high-voltage power supply, a collection plate, a displacement control platform, afocusing irradiation light source, a sheath gas device and a focusing heating light source; the injection pump conveys a solution in the injection needle tube to the electrospinning needle head, thecollection plate is located below the electrospinning needle head, a displacement control platform drives the collection plate to move, the collection plate comprises photosensitive collecting units distributed in an array manner and insulating media, and the insulating media are filled into the positions between the adjacent photosensitive collecting units; and the focusing irradiation light source is focused on the photosensitive collecting units below the electrospinning needle head, and the high-voltage power supply is used for providing an electric field between electrospinning needle head and the photosensitive collecting units. According to the preparation device, point-to-point jet printing receiving is realized through the photosensitive collecting units distributed in the array manner, the jet printing precision is improved, the jet printing efficiency is improved, and rapid jet printing of complex micro-nano structures such as a single-point stacked structure and a suspendedstructure becomes possible.

The invention provides a metabolism cage used for adult cattle. The metabolism cage comprises a rectangular cage body having three side fences and a door fence; the bottom of the cage body is a bottomplate suspended in air, the bottom of one end, close to the door fence, of the bottom plate is provided with a convex platform, the middle position of the part, located on the convex platform close to one end of the door fence, of the bottom plate is provided with a dung leaking opening, sliding grooves are arranged in the part, located on two sides of the dung leaking opening, of the convex platform, a curtain plate is arranged in one sliding groove, the upper part of one end, close to the door fence, of the curtain plate is provided with a push plate, the push plate passes through the dungleaking opening to extend into the cage body, and the other end of the curtain plate is connected with a push rod of an electric push rod 1 through a rotating shaft; a shell of the electric push rod 1is fixed under the bottom plate; and a proximity sensor is arranged on a railing of the upper part of one side fence, the proximity sensor is connected with a signal processor, the signal processor is connected with a control panel, and the control panel is provided with a turning-on button of the electric push rod 1 and a turning-off button of the electric push rod 1. The metabolism cage provided by the invention has the beneficial effects of having a simple structure and automatic separation and collection of dung and urine, and being capable of improving accuracy of dung collection.

The invention provides a signal collection method and a signal collection circuit of an image sensor. The image sensor comprises a plurality of pixels arranged in an array, each pixel comprises photodiode, and the signal collection method comprises the following steps: performing signal collection on the plurality of pixels row by row within each signal collection period, wherein the signal collection period comprises at least one reset frame and at least one clearing frame, and applying a forward bias voltage to the photodiode of each collected pixel in each reset frame; and applying a reverse bias voltage to the photodiode of each collected pixel in each clearing frame. By adoption of the scheme provided by the invention, while the signal collection period is shortened, a better clearing effect is ensured, and the influence of ambient light on imaging is eliminated.

The invention discloses a flexible pressure sensing array prepared by utilizing a laser cutting manner. The flexible sensing array is composed of a plurality of sensing units connected in parallel, each of the sensing units is a five-layer superimposed structure, and the five-layer superimposed structure separately includes a substrate film, a column electrode, a laser-cut hollow-out piezoresistive film, a row electrode and a protective film from bottom to top, the column electrode is printed on the substrate film, an electrode of the row electrode is printed on the protective film, the laser-cut hollow-out piezoresistive film is sandwiched between the substrate film printed with the column electrode and the protective film printed with the row electrode, and the substrate film and the protective film are bonded together by glue; and in order to reduce crosstalk between the sensing units, a part of the piezoresistive film between the sensing units utilizes laser resection, and a part of connection is remained between the sensing units to keep a relative position and an overall shape unchanged. The flexible pressure sensing array enables the crosstalk to be reduced without increasing assembly complexity, solves the conflict of the crosstalk and the assembly complexity, and can be simultaneously applied to real-time graphical pressure distribution display.

The invention discloses a signal detector which comprises a signal detecting box and a detecting cable. The signal detecting box is internally provided with a controller, a wireless communication module, a display screen, a data acquisition module, a signal conditioning circuit, a load simulating module, a testing interface, a relay module and an RS485 communication module. The signal detector according to the invention simulates a missile hanging-up state through the load simulating module, thereby realizing normal operation of an on-plane weapon control system and an on-plane missile launching device, performing simulation detection on a crosslinking signal between the missile and the on-plane weapon control system without mounting a training missile, accurately detecting a fault reason,and preventing missile damage caused by misjudgment. Furthermore the signal conditioning circuit is used for performing signal conditioning on four DC power supply signals supplied to the missile byan on-plane power supply and an indicating signal that is transmitted from the on-plane weapon control system to the missile, thereby ensuring identifiability of the data acquisition module, improvingsignal acquisition accuracy and further ensuring high accuracy of the simulating detecting result.