31results about How to "Long-term online monitoring" patented technology

The invention discloses a metal / rare earth carbonate-based solid carbonate electrode and a preparation method thereof. The metal / rare earth carbonate-based solid carbonate electrode comprises a metal wire, a rare earth carbonate, a cation shielding film and a heat-shrinkable tube, wherein a rare earth carbonate layer is electroplated on the lower surface of the metal wire in an in-situ mode; the cation shielding film is coated on the external surface of the rare earth carbonate; and the heat-shrinkable tube is coated on the middle part of the metal wire and the upper part of the cation shielding film. The metal / rare earth carbonate-based solid carbonate electrode has the advantages of high mechanical strength, high toughness, high sensitivity, small size, quick detection response, low detection lower limit, long service life and the like, is matched with a solid reference electrode, and is suitable for performing on-line detection and long-term in-situ monitoring on the carbonate ion content in seawater, culture water and chemical and chemical engineering water media.

The invention discloses a rare earth / rare earth carbonate-based solid carbonate electrode and a preparation method thereof. The rare earth / rare earth carbonate-based solid carbonate electrode comprises a rare earth wire, a rare earth carbonate, a cation shielding film and a heat-shrinkable tube, wherein a rare earth carbonate layer is electroplated on the lower surface of the rare earth wire in an in-situ mode; the cation shielding film is coated on the external surface of the rare earth carbonate; and the heat-shrinkable tube is coated on the middle part of the rare earth wire and the upper part of the cation shielding film. The rare earth / rare earth carbonate-based solid carbonate electrode has the advantages of high mechanical strength, high toughness, high sensitivity, small size, quick detection response, low detection lower limit, long service life and the like, is matched with a solid reference electrode, and is suitable for performing on-line detection and long-term in-situ monitoring on the carbonate ion content in seawater, culture water and chemical and chemical engineering water media.

The invention discloses an on-line monitoring analyzer for fluorinion in water and detection method thereof, the method is characterized in that: by design and integral assembly innovation of a multi-branch plate solenoid valve combination module, a stirring and detection tank module, a signal acquisition control unit and a parameter setting control and analysis display unit, automatic operation of sensor signal acquisition, solenoid valve control, peristaltic pump control, stirring device control, waste liquid discharge, and result analysis, calculation and display, is implemented; preparation of high and low fluorine standard solutions and multi-step measurement can be automatically completed; and a condition that multi-devices are manually controlled for measuring in current detection is overcome. By technology integration and modularization design for the current test processes by a technical scheme provided by the invention, long-term, continuous, simple and rapid on-line monitoring on fluorinion in water can be easily implemented by apparatus for a non professional. The method has advantages of high result instantaneity, small reagent amount and low operation cost.

The invention relates to an intrinsic safety opto-acoustic spectrum gas monitoring system based on an optical acoustic sensor. The Intrinsic safety opto-acoustic spectrum gas monitoring system comprises a light source device which is connected with a photoacoustic cell device through optical fibers and an optical fiber collimator, and the incident direction of laser emitted from the light source is collinearly aligned with the axle center of the photoacoustic cell device; and phase-shifting erbium-doped grating optical fiber with the 1 / 4 wavelength of the optical acoustic sensor is annularly paved on the inner wall of the photoacoustic cell device, the photoacoustic cell device is communicated with a gas to be tested, and the grating optical fiber is connected with a demodulation device and a data acquisition device. The invention has the advantages of high detection sensitivity, fast response speed, and the like and can realize fast, accurate and long-term on-line monitoring of tracetoxic and harmful gases or other specific gases, in particular to accurate measurement and analysis of gases under some special detection environments, such as the strong electromagnetic environment,the radioactive environment, the environment in a gas-production coal mine which is not allowed to use a power supply device on site, and the like.

The invention relates to a wing shearing force real-time monitoring method based on the measured strain of a fiber bragg grating (FBG). The method comprises the specific steps of 1, arranging a fiber grating sensor on a wing; 2, obtaining the measured strain of the fiber grating sensor; 3, analyzing the shearing force state of the wing; 4, calculating the shearing force of the wing. Based on the above steps, the measured strain data of the fiber grating sensor arranged on the wing, the shearing force of the wing is calculated and obtained. Therefore, only based on the measured strain of the fiber bragg grating, the shearing force of the wing is obtained without obtaining the information of the load of the wing, the structure of the wing and the like. As a result, the actual problem that the shearing force of the wing can be monitored in real time only based on the measured strain of the fiber bragg grating can be solved.

The invention belongs to the field of intellectualized and networked sensing monitoring, relating to a method for identifying an array element of a surface acoustic wave passive wireless array. The method comprises the steps as follows: determining an available space set according to the region size of the surface acoustic wave sensor array, the region size of a reader writer antenna, the distance between the two regions and distribution of monitoring points; placing a sensing element composed of a surface acoustic wave sensor and an antenna connected with the sensor at each monitoring point in the space set; dividing a sensor array according to the wave beam range of the reader writer antenna, so as to form a space diversity of the array; further dividing the space diversity of each array according to the requirement of polarization isolation of sensor antennae, dividing sensing elements in the same space diversity into different polarity diversities according to a polarization anglecapable of discriminating the same frequency, wherein the polarization angles of the antennae of the sensing elements contained in each polarity diversity are the same; and allocating a reader writerprovided with multiple antennae to each space diversity, wherein the reader writer communicates with the sensing element by time division multiplexing and frequency division multiplexing. The invention can improve the capability of a system to contain surface acoustic wave sensor terminals, thus causing the system to support more sensor terminals in the field of intellectualized and networked sensing monitoring.

The invention discloses a submarine observation network system based on an integrated junction box, comprising a first shore base station and a second shore base station, the first shore base station and the second shore base station are connected by a submarine cable, and the submarine cable consists of multiple sections Submarine optical cable connection structure, two adjacent sections of submarine optical cables are connected through an integrated junction box, each integrated junction box is connected with a sensor, the integrated junction box is used to control the sensor to collect submarine information data, and The collected submarine information data is transmitted to the submarine optical cable connected to the integrated junction box, and the submarine optical cable is transmitted to the adjacent integrated junction box, and the submarine information data continues through the adjacent integrated junction box It is forwarded to the next integrated junction box, and finally transmitted to the first shore base station or the second shore base station. The invention can conveniently and effectively collect and communicate ocean information data in real time, reduces transmission time delay and improves data transmission reliability.

The invention relates to a multi-beam deformation detecting device which comprises a probe, a digital signal processor DSP, a personal computer PC, a laser group and a prism reflection target, wherein the prism reflection target is arranged on a point to be tested, the probe and the laser group are arranged on a measuring point, a laser beam group emitted from the laser group is reflected throughthe prism reflection target by adjusting the laser group and then forms an overlapped light spot on the probe, a barycenter of the overlapped light spot is determined by utilizing a photoelectronic tracing macro pixel iteration barycenter method, and the deformation of the point to be tested is further determined through the barycenter offset distance. The invention can effectively avoid the influences on environmental change, air turbulence and stray light, can realize long-term online monitoring, and has accurate measurement data, high detection precision, simple structure, low cost and convenient operation.

The invention discloses a silver / metal phosphate-based solid phosphate electrode and a preparation method thereof. The silver / metal phosphate-based solid phosphate electrode comprises a silver wire, a metal phosphate, a cation shielding film and a heat-shrinkable tube, wherein a metal phosphate layer is electroplated on the lower surface of the silver wire in an in-situ mode; the cation shielding film is coated on the external surface of the metal phosphate; and the heat-shrinkable tube is coated on the middle part of the silver wire and the upper part of the cation shielding film. The silver / metal phosphate-based solid phosphate electrode has the advantages of high mechanical strength, high toughness, high sensitivity, small size, quick detection response, low detection lower limit, long service life and the like, is matched with a solid reference electrode, and is suitable for performing on-line detection and long-term in-situ monitoring on the phosphate ion content in seawater, culture water, industrial cycle cooling water and boiler water.

The invention relates to a rear-arranged in-concrete reinforcing bar rust expansion strain monitoring device which belongs to the technical field of monitoring equipment. The device comprises a threaded reinforcing bar, a base and at least two sets of sensing units. Each sensing unit comprises a cylindrical column, a resistance strain meter which is arranged on the external surface of the cylindrical column, and a thick wall support arranged outside the cylindrical column. The bottom of the thick wall support is provided with a supporting platform for supporting the cylindrical column. The sensing unit further comprises an insulating lead. The resistance strain meter is connected with the insulating lead. A plurality of sensing units are successively connected and are connected with a strain acquisition instrument through the insulating lead. The bottom of the supporting platform of the thick wall support of a downmost sensing unit is connected with a base. The threaded reinforcing bar is arranged in the cylindrical columns of the plurality of successively connected sensing units and is connected with the base. The rear-arranged in-concrete reinforcing bar rust expansion strain monitoring device has advantages of higher precision, higher reliability and high information volume. The device can directly realize continuous testing for the reinforcing bar rust expansion strain and furthermore realizes long-term and real-time online monitoring to a rusting process and a rust corrosion process of the reinforcing bar in a common concrete structure.

The invention provides a hidden fault detection method for a relay protection device. The method includes the following steps that: I, voltage amplitude values of nodes in a power grid are measured and collected; II, state estimation is performed on the measured values, so that the estimated values of the nodes can be obtained, and the reference value of hidden failure detection is determined; III, the threshold value of the hidden failure detection is determined; and IV, hidden failure determination conditions are determined, so that whether a hidden failure exists can be judged. With the method adopted, a relay protection device with a hidden fault can be effectively detected out, and therefore, protection malfunction or protection operation failure caused by the hidden fault can be avoided, and the accident of the power grid can be further avoided.