31results about How to "Convenient means" patented technology

The invention relates to a method for measuring tunnel lining cracks. The method comprises the following steps of: acquiring an image of a crack by a digital camera and measuring the acquisition distance by a laser ranger; selecting an area needing to be measured from the acquired image so as to prevent processing deviation due to excessively big picture and relatively small target crack, and changing the selected area into a gray image; determining a threshold for the selected gray image and performing binarization image division to obtain a target area; extracting a white area only comprising the crack from the target area; extracting the border of the crack to obtain a border graph; calculating the pixel width of the crack by a minimum distance method; and obtaining the actual width of the crack according to a predetermined calibration proportion between the actual pixel size and the photographing distance. The method has the advantages of low cost, high speed, convenient carrying and high measurement precision.

The invention relates to a tunnel lining crack width measuring method, which comprises the follow steps of: (1) picking up crack images through a digital camera and measuring pickup distance through a laser distance measuring instrument; (2) selecting a region required to be measured on the picked images and converting selected region images into gray level images; (3) determining the threshold value of the gray level images selected in the second step, cutting binary image cutting, and obtaining a target region; (4) extracting a white region only comprising crack in the target region; (5) extracting the edge of the crack by a sub pixel method, and obtaining sub pixel level edge images; (6) circulating the pixel width of the crack by a minimum distance method; (7) circulating the actual width of the obtained crack according to the calibration proportion of the predetermined actual pixel size and the image pickup distance; and (8) storing the obtained actual width data into a crack data base. Compared with the prior art, the tunnel lining crack width measuring method has the advantages of low cost, high speed, convenience, high precision and the like.

The present invention discloses a numerically-controlled machine tool thermal error on-line compensation method and system. The numerically-controlled machine tool thermal error on-line compensation method comprises the steps of: acquiring key measuring point temperature data of a numerically-controlled machine tool; calculating a theoretical thermal error value of the numerically-controlled machine tool according to a multiple linear regression thermal error model; calculating a compensation value and judging whether the compensation value meets a set upper-lower limit range of a compensation threshold value. According to the numerically-controlled machine tool thermal error on-line compensation method, the multiple linear regression thermal error model is built and is used as a thermal error on-line compensation subunit of the numerically-controlled machine tool to be embedded into a human-computer interaction interface of a panel control unit, and an external compensator is not needed, thereby greatly improving universality of the system; at the same time, a fuzzy clustering analysis method and a multiple linear regression theory are used to calculate the compensation value of the numerically-controlled machine tool, and an external coordinate transformation mode is adopted for performing on-line compensation, thus convenient operation and good real-time performance are achieved.

The invention provides a visual searching method applicable a mobile terminal. The method comprises the concrete processes including the steps that 1, the mobile terminal is utilized for collecting images to be identified of the current scene, and in addition, the gravity direction of the mobile terminal during the image collection and the GPS (global position system) information of the current scene are obtained; 2, the binary local feature vectors of the images to be identified are obtained; 3, the GPS information and the binary local feature vectors are packed into a descriptor file, and the descriptor file is sent out; 4, images corresponding to the GPS information with the shortest distance from the extracted GPS information are extracted from a sample image base, and are defined as inquiry images; 5, the images to be identified are subjected to one-to-one matching with the binary local feature vectors of the inquiry images, the inquiry images with the shortest distance from the images to be identified are found, in addition, corresponding information is transmitted to the mobile terminal, and the visual searching is realized. The method can provide a more convenient measure for users of the mobile terminal to obtain relevant information of the current scene.

The invention provides a scene information searching method based on binary feature codes, and belongs to the technical field of mobile augmented reality technologies. The scene information searching method specifically includes the steps of firstly, collecting an image to be recognized of a current scene, and obtaining GPS information and gravity direction information; secondly, obtaining a descriptor feature vector of the image to be recognized; thirdly, packaging the GPS information, the gravity direction information and the descriptor feature vector into a descriptor file, and sending the descriptor file to a server; fourthly, calculating the included angle between the main direction of the descriptor feature vector and the gravity direction of the descriptor feature vector through the server; fifthly, conducting mapping on the descriptor feature vector through the Hash function; sixthly, finding a corresponding GPS information chain table closest to the GPS information; seventhly, obtaining a Hash table set; eighthly, conducting filtering on the Hash table set based on the included angle; ninthly, finding the best matching sample image in the Hash table set which is filtered, and feeding the scene information corresponding to the sample image back to a mobile terminal.

The invention discloses an electrochemical measuring device and a measuring method for bottom corrosion of a rust layer of a spoondrift splashing region. The electrochemical measuring device for the bottom corrosion of the rust layer of the spoondrift splashing region comprises a sealed dryer, an electrolytic tank, a working electrode, a reference electrode, an auxiliary electrode and mirror wiping paper. The device and the method can be used for measuring corrosion electrochemical behaviors in the spoondrift splashing region of a metal electrode covered by the rust layer, so that convenient and effective means are provided for a research process of the corrosion electrochemical behaviors under the rust layer of the spoondrift splashing region.

The invention belongs to the technical field of oil field oil extraction, and particularly relates to a method for obtaining crude oil water content based on an oil well indicator diagram. The methodcomprises seven steps of obtaining data in an indicator diagram, obtaining a suspension point static load value, obtaining a suspension point inertia load value, obtaining a suspension point vibrationload value, obtaining a friction load value, calculating the oil well moisture content and monitoring the crude oil moisture content. An existing digital oil well working condition diagnosis technology is utilized, the water content of an oil well is calculated in real time through a water content formula, the water content of the oil well is conveniently calculated and monitored, the labor intensity of field workers and investment of manpower, material resources and financial resources of an oil field are effectively reduced, and fine monitoring of oil well yield fluctuation of the oil fieldis achieved.

The invention discloses a theoretical line loss estimation method based on interrogation data. The method aims to solve the problems that a theoretical line loss calculation method in the prior art needs a large amount of data, has high data requirements, is complex and is not suitable for a production environment. The method comprises the following steps: S1, identifying a large-power user according to the daily power consumption of the user; s2, load interrogation is carried out, and power utilization data of a large-electric-quantity user and a terminal are obtained; and S3, calculating a theoretical line loss value according to the interrogation data. The theoretical line loss value is estimated simply and quickly with less data required by calculation, so that workers can know the line loss condition and the change trend preliminarily and conveniently, and the method is suitable for the production environment.

The invention belongs to a monitoring processor used to extract a useful signal from high noise by being matched with a wireless router and so on in the remote monitoring and processing technique of a wireless network and a processing method thereof. The processor comprises a CPU, a communication module, a program read-write port module, a parallel communication module, an analog-digital conversion module, a constant current source module, a voltage transformation circuit, a signal filter and high voltage protection circuit, a signal amplifying module, a current signal adjusting circuit, a memory and a keyboard input circuit; and the method comprises: after the communication module receives a signal, firstly the threshold filtration of noise is performed, and the wavelet transformation processing of the signal is performed in the wavelet field through the CPU so as to reduce or completely eliminate the noise. Therefore, the processor and the method have the characteristics that the processor and the method can effectively extract the useful signal from a great amount of disorder noise signals, and automatically send the useful signal to a device such as a platform terminal and the like, and the point-to-point and one-to-many communications are realized; and the invention also provides a convenient and reliable method for mobile office work by utilizing the prior GSM network.

The invention discloses a student canteen system, and belongs to the technical field of canteens, the system comprises a student card and a mobile phone terminal. The student card and the mobile phoneterminal realize interaction through the intelligent canteen management system; the intelligent canteen management system comprises a reader and a message sending system. The reader is in signal connection with the information management system; the information management system is in signal connection with the message sending system; the student card is connected with the reader through the RFIDtechnology. The information management system realizes the functions of student account balance statistics, canteen remaining position calculation and dining time calculation; the information management system obtains intelligent dining information according to the functions, the message sending system transmits the intelligent dining information to the mobile phone terminal through the mobile communication technology, intelligent dining of students is achieved, the situation that the students have no dining seats and queue too long is effectively avoided, the system is scientific, reasonableand wide in application range, and a convenient means is provided for dining of the students.

The invention discloses a grounding line selection alarm correctness verification method based on SCADA data. The method comprises the following steps: the SCADA acquires various data in real time; the SCADA retrieves whether a bus grounding signal exists or not, and if so, whether the bus grounding signal comes from a first bus grounding signal sent by a transformer substation small current grounding line selection device or a second bus grounding signal calculated by the SCADA itself is judged; if the bus grounding signal is the first bus grounding signal, the SCADA retrieves a self grounding judgment condition within a first preset time when the first bus grounding signal is received, and whether the first bus grounding signal exists or not is compared; and if the bus grounding signal is a second bus grounding signal, the SCADA retrieves the received data within a second predetermined time when the second bus grounding signal is received, and compares whether the second bus grounding signal exists or not. According to the invention, the correctness of the grounding line selection signal of the low-current grounding line selection device at the current power plant station end can be verified, so that the accuracy of the grounding line selection alarm of the device is improved, and the device can be improved conveniently.