53results about How to "Suitable for long-term monitoring" patented technology

The invention discloses a fiber bragg grating detection system device and method for detecting an anchoring force of an anchor rod. The fiber bragg grating detection system device consists of a fiber bragg grating sensor array, a fiber bragg grating anchor rod dynamometer, a fiber bragg grating demodulator, an optical cable and a computer, wherein the fiber bragg grating anchor rod dynamometer mainly comprises a plurality of fiber bragg grating sensors which are uniformly arranged on an annular elastic body arm and is arranged at the end part of the anchoring end of the anchor rod; meanwhile, the fiber bragg grating sensor array is distributed on a rod body of the anchor rod; the fiber bragg grating sensor array and the fiber bragg grating anchor rod dynamometer are respectively connected with the fiber bragg grating demodulator through the optical cable; and the fiber bragg grating demodulator is connected with the computer. According to the fiber bragg grating detection system device, the real-time detection on the stress of the anchor rod can be realized and the distributed measurement can be realized. The fiber bragg grating detection system device has the advantages of simple structure, convenience in mounting, high detection speed, long-distance monitoring, repeated use and easiness in protection and maintenance, and is widely applied to tunnels and slopes dug for coal mines, metallurgical mines, water conservancy, railways, roads and defense.

The invention discloses a laser sedimentation flexibility monitor which comprises more than one group of transmitting units and receiving units which are mutually matched, wherein each transmitting unit is a laser used for transmitting a laser beam to each receiving unit, each receiving unit comprises a linear array CCD (Charge Coupled Device) image acquisition unit, an analyzing and processing system and a power supply, the linear array CCD image acquisition unit is used for acquiring the laser beam and converting the laser beam into an electric signal to be transmitted to the analyzing and processing system, and the analyzing and processing system is used for processing the electric signal and then judging sedimentation deformation. The laser sedimentation flexibility monitor has the advantages of simple and compact structure, low cost, convenience for installation and debugging, stable and reliable work, and the like.

The invention discloses a water loss and soil erosion remote-sensing dynamic monitoring method based on a modified universal soil loss equation, which includes the implementation steps: 1) acquiring a rainfall erosivity factor, a soil erodibility factor and a terrain factor; 2) acquiring remote sensing images of a to-be-monitored area, performing land use/coverage category division according to the remote sensing images to obtain multiple land categories, and respectively estimating a vegetation coverage-management factor of each land category so as to obtain a comprehensive vegetation coverage-management factor; 3) extracting characteristic information affecting water and soil conservation from the remote sensing images, and estimating a water and soil conservation measure factor according to the characteristic information affecting water and soil conservation; and 4) calculating an average annual soil loss amount estimated value of the to-be-monitored area according to the modified universal soil loss equation, and outputting the value. The water loss and soil erosion remote-sensing dynamic monitoring method based on the modified universal soil loss equation has the advantages of reasonable estimated result, high universality, suitability for long-term dynamic monitoring of water loss and soil erosion in the area and wide application range.

The invention relates to a multi-data based crop water demand detection system, comprising a data detection unit, a wireless transmission unit, a data fusion processing unit and a decision information publishing unit, wherein the data detection unit is used for detecting and acquiring crop growth information in real time, the wireless transmission unit is used for transmitting the growth information to the data fusion processing unit, the data fusion processing unit is used for fusing and processing different data in the growth information and obtaining decision information on whether the crop demands water or not, and the decision information unit is used for publishing the decision information on whether the crop demands water or not. The invention further discloses a multi-data based crop water demand detection method. The invention can carry out rapid and dynamic monitoring on the crop and make an accurate judgment on the water demand state of the crop.

The invention relates to a normal temperature enrichment and sampling method for xenon in air, and an apparatus thereof. According to the present invention, a hollow fiber semi-permeable membrane group is adopted as an air pretreatment apparatus; a four-stage adsorption column is adopted to enrich and concentrate the xenon in the air step by step, wherein the first-stage adsorption column adopts two sets of parallel structures, the two sets of the parallel structures alternatively work, such that continuous and uninterrupted sampling is realized; an adsorbent of activated carbon is adopted. With the present invention, the apparatus of the present invention has characteristics of rational design, simple structure and convenient operation; the difficulty of impurity removing in the subsequent concentration process is reduced; the apparatus is applicable for long-termly monitoring the atmospheric environment; the sampled sample has strong representativeness, and no time empty window is generated; the method and the apparatus can be applicable for sampling the noble gas xenon in the air.

The invention relates to a long-term monitoring and pre-warning method applicable to deformation of the wood structure of a historic building. The long-term monitoring and pre-warning method is characterized in that a FBG (Fiber Bragg Grating) strain sensor and an ICBM (Improved Conjugate Beam Method) are adopted for monitoring deflection deformation of a beam, and out of joint of a beam column is monitored by using a telescopic FBG displacement meter. Inclination of a column is monitored by a FBG inclinometer; the measuring sensor is fixedly adhered to a structure to be measured by using the method of adopting epoxy resin matched with an iron rack and a fixed support seat. According to the long-term monitoring and pre-warning method, the used instruments are strong in corrosion resistance and stability; the method has small disturbance to the historic building, and is convenient to operate, simple and easy to implement, and unnecessary to learn physical characteristics of the wood structure, thus being applicable to monitoring and pre-warning deflection deformation of the wood structure of the historic building.

The invention relates to an automatic deformation monitoring system based on laser ranging, and the system comprises a laser transmitter, a laser receiver and a data acquisition chip. The system utilizes the current mature laser ranging technology to automatically measure the structural deformation, and overcomes the shortcomings of the existing common manual reading-based level/total station measurement method, which is subjectively affected by the measurement personnel, the shortcomings of the complex construction of a connection tube measurement method and the disadvantages of low measurement accuracy of GPS measurement method and the expensive operation of the displacement test method based on image processing, and improves the effect of deformation monitoring. The system is suitable for long-term deformation monitoring of bridges, culverts, roadbeds, tunnels, slopes, building construction and the like.

The invention discloses dry-adhesive medical adhesive tape and a preparing method of the dry-adhesive medical adhesive tape. The medical adhesive tape is a thin polymer film provided with micron order mushroom-shaped poles of an arrayed structure and polymer is dimethyl silicone polymer. The invention further relates to the preparing method of the dry-adhesive medical adhesive tape. The method comprises the steps that step 1, a first silicon wafer is taken and spin-coated with photoresist, drying is conducted, exposure and development are conducted through UV light, and therefore an arrayed hole structure template can be obtained; step 2, the dimethyl silicone polymer is cast on the arrayed hole structure template, solidification is conducted, and the dimethyl silicone polymer is taken down; step 3, a second silicon wafer is taken and spin-coated with dimethyl silicone polymer, the dimethyl silicone polymer taken down in the step 2 is placed on the second silicon wafer, after being taken down from the second silicon wafer, the dimethyl silicone polymer is placed on a third silicon wafer, solidification is conducted, and the dimethyl silicone polymer is taken down, so that the dry-splicing adhesive tape is obtained. The dry-adhesive medical adhesive tape adheres to the skin through VDW (Van der Waals force), a physiological electrode for measurement can be fixed, irritation to the skin is avoided, the adhesive strength of the dry-adhesive medical adhesive tape cannot be reduced after the dry-adhesive medical adhesive tape is used for a long time, and the dry-adhesive medical adhesive tape is suitable for long-time physiological signal detection.

The invention relates to a high-frequency acceleration sensor with optical fiber Bragg gratings and an application method of the high-frequency acceleration sensor, and belongs to the technical field of photoelectron measurement. According to the high-frequency acceleration sensor, a mass block is fixed at the top of a steel pipe and the bottom of the steel pipe is fixed on a base; a left elastic steel sheet and a right elastic steel sheet are arranged at the left and right sides of the steel pipe respectively; the lower ends of the left elastic steel sheet and the right elastic steel sheet are fixed on the base; the upper ends of the left elastic steel sheet and the right elastic steel sheet are connected and fixed onto the left and right ends of the mass block respectively; after being connected in series and welded, a left optical fiber Bragg grating and a right optical fiber Bragg grating are stuck on the left elastic steel sheet and the right elastic steel sheet respectively; one end of the left optical fiber Bragg grating and one end of the right optical fiber Bragg grating are connected through an optical fiber; leading-out optical fibers of the other end of the left optical fiber Bragg grating and the other end of the right optical fiber Bragg grating are led out from one side of the base respectively. With the adoption of the optical fiber Bragg gratings, the high-frequency acceleration sensor has relatively high anti-electromagnetic interference capability and anti-corrosion capability, and is suitable for monitoring a transformer for a long period; the high-frequency acceleration sensor is simple in structure and convenient to operate.

The invention discloses a rotating machinery shaft torsion vibration fault monitoring method under variable frequency speed regulation driving. The method comprises the following steps: collecting three-phase stator current signals ia, ib, ic of an asynchronous motor; carrying out Park transformation and Clarke transformation on the three-phase stator current to obtain d-axis and q-axis stator currents id, iq under a d-q coordinate system; carrying out fast Fourier transform on the q-axis stator current component iq to obtain frequency spectrum thereof; setting shaft key parameters and calculating shaft torsion vibration inherent frequency; calculating the ratio of a component, of which the frequency is near the shaft torsion vibration inherent frequency and the absolute value is maximum and a component, of which the frequency is near 0 Hz and the absolute value is maximum in the q-axis stator current component iq; and judging the ratio, and if the ratio surpasses a certain threshold value, judging that torsion vibration fault occurs. The beneficial effects are that, at the electrical side, analysis is carried out on the three-phase stator current; monitoring index is simple, and convenient operation is achieved; and the method does not need the help of existing or extra mechanical equipment, does not influence normal operation of a rotation shaft, and is suitable for long-term monitoring.

The invention discloses a construction method of Slco1b2 gene knockout rat and an application thereof. According to the invention, construction of Slco1b2 gene knockout rat is carried out by using a CRISPR/Cas9 system, which includes selection of Slco1b2 knockout targets, in-vitro synthesis and transcription of sgRNA and Cas9 mRNA, preparation of pseudopregnant mother rats, in-vitro microinjectionand transplantation of single cell embryos, rat breeding and screening, and obtaining of homozygote Slco1b2 gene knockout rat. Through verification by T7EI endonuclease, the gene knockout rat prepared by the method of the invention does not generate off-target phenomenon, and in the F2-generation knockout rat of about 4 weeks, total bilirubin, direct bilirubin and indirect bilirubin content are significantly higher than that of wild type rats. The invention also proposes an application of the construction method for hyperbilirubinemia research and drug development. The method provides an effective method for researching diseases such as increased bilirubin, and provides an effective experimental tool for drug research and development, and has broad application prospects.

The invention belongs to the technical field of coal mine roadway ventilation, and particularly relates to a coal mine roadway section anemometer and a measurement method thereof. The average wind velocity, not the single point wind velocity, of the whole section of the coal mine roadway can be accurately measured online in real time. According to the technical scheme, the coal mine roadway section anemometer comprises a host frame and two probes. The probes are connected with the host frame through signal lines. The host frame comprises an upper cover and a lower shell. The upper cover is connected on the lower shell. The upper cover is provided with a liquid crystal display screen. The host frame is internally provided with a signal processing board, a circuit fixing board and a displaycommunication board. The circuit fixing board is fixed on the lower shell. The signal processing board is connected with the circuit fixing board. The display communication board is connected with theliquid crystal display screen and used for data display. The probes are the ultrasonic transducers and connected with the signal processing board through the signal lines, the signal processing boardis connected with the display communication board and the specific measurement method is applied to perform measurement.

The invention provides a long-base-line strain gauge and hull beam stress long-term monitoring device. The long-base-line strain gauge and hull beam stress long-term monitoring device comprises two bases, wherein a first support and a second support are respectively installed on the two bases, a magnetostrictive displacement sensor is installed on the first support, one end of a measuring extension rod is fixedly connected with one end of a slide block installing rod arranged in the middle of the magnetostrictive displacement sensor, the other end of the slide block installing rod is connected with a sensor measuring slide block, and the other end of the measuring extension rod is fixedly connected with the second support. The long-base-line strain gauge and hull beam stress long-term monitoring device has the advantages of being simple in structure, convenient to install, dispense with calibration, accurate in measurement and free of temperature drift and the like and is suitable for long-term monitoring of hull beam stress and load states of large ships.

The invention discloses a ground surface settlement quasi-distributed monitoring device and method based on an optical fiber sensing technology. The device comprises quasi-distributed settlement monitoring station points, a distributed optical fiber fixed-point sensing circuit, a PPP-BOTDA optical fiber data acquisition instrument and a data processing system. A fixed-point anchoring support is arranged on each quasi-distributed settlement monitoring station point; the distributed optical fiber fixed-point sensing circuit comprises distributed optical fiber inlet parts and distributed opticalfiber return parts, and the two distributed optical fibers are fixed on the fixed-point anchoring supports; the distributed optical fiber inlet parts are arranged in a zigzag mode, and the distributedoptical fiber of the distributed optical fiber inlet part between every two adjacent fixed-point anchoring supports are in a pre-stretching state; and the distributed optical fiber of the distributedoptical fiber return part between every two adjacent fixed-point anchoring supports are in a relaxed state. Under the condition that the spatial resolution is met, the monitoring range is enlarged, the monitoring precision is guaranteed, and the defects of low efficiency, low spatial resolution and low precision of the conventional monitoring technology are overcome.

The invention provides a method for monitoring the movement amount of a steel wire rope in the elevator braking process. The method is characterized by comprising the following steps that an industrial camera is used for shooting a traction steel wire rope set in the braking process, shot images are transmitted into a computer, the computer calculates the movement amount of the traction steel wirerope through an image recognition algorithm, and the result is displayed on a display equipment. According to the method, non-contact measurement is realized, a measurement device does not influencethe performance of a brake, a traction brake device does not need to be modified, a measured object can be found out according to the images, the requirement on the installation precision is lowered,the influence of environmental change on a detection system is also reduced, and the task of monitoring the movement of the steel wire rope for a long time can be completed.

The invention discloses a rapid detection method for harmful algal bloom species molecules based on high-throughput sequencing. The rapid detection method specifically comprises the following steps: (101) a standard strain screening step, (102) a gene information acquisition step, (103) a quantitative standard establishment step, (104) a high-throughput detection step and (105) a determination step. The invention provides the rapid detection method for harmful algal bloom molecules based on high-throughput sequencing, the method is developed by combining the scientific research and practice requirements of the method, is cost-saving, and can monitor the harmful algal bloom more efficiently and precisely.

The invention aims to provide a high-precision tunnel slab staggering positioning system and method based on a low-coherence interference technology. The system comprises a broadband light source, a first optical fiber cable, a second optical fiber cable, a third optical fiber cable, a first coupler, a second coupler, three LCI displacement meters, an optical mobile scanning platform, an optical fiber with a flat tail end, and a signal collection and processing system. According to the invention, the 3D printing technology and the Michelson low-coherence interference technology are combined; the sensor has the advantages of convenience, quickness, low cost, improvement of the monitoring stability of the sensor and the like of a 3D printing manufacturing technology, also has the advantagesof high precision, strong electromagnetic interference resistance and suitability for long-term monitoring of tunnels of a low-coherence interference technology, and can be applied to engineering practical situations.

The invention discloses a sensing type crack sensing material as well as a preparation method and application thereof. The sensing type crack sensing material comprises the following raw materials: carbon nanofibers, polyvinyl alcohol fibers, a polycarboxylic acid composite water reducing agent, a cementing material and machine-made sand, and the cementing material comprises fly ash, superfine slag powder and cement in a weight ratio of (50-70): (10-15): (20-25); the volume mixing amount of the carbon nanofibers is 0.5-1% of the total volume of the raw materials; the volume mixing amount of the polyvinyl alcohol fiber is 1-2% of the total volume of the raw materials. The sensing type crack sensing material and the preparation method and application thereof have the advantages that the strain deformation range is large, the crack development process can be well detected, the sensing type crack sensing material and a pavement can be cooperatively deformed, and long-distance transmission can be achieved.