117results about How to "Monitor changes" patented technology

The invention discloses an evaluation testing device for an anti-sand screen tube blockage characteristic in an exploitation process of natural gas hydrate and a method thereof. The device comprises atesting device body, a supporting seat, a liquid supplying system, an air supplying system and a fluid leading-out acquisition system. The testing device body is longitudinally mounted on the supporting seat and can longitudinally rotate on the supporting seat. The testing device body comprises a reaction kettle, a constant-temperature clamping jacket, an anti-sand sieve tube module, a pressure sensor, a temperature sensor, a resistivity sensor, etc. The circumferential wall of the reaction kettle is provided with a kettle body interface. The circumferential wall of the constant-temperature jacket is provided with an external interface at a position which corresponds with the kettle body interface. According to the evaluation testing device, the anti-sand screen tube blockage condition indifferent stratum conditions and exploitation conditions and the influence of the stratum factor to screen tube blockage in a sand outlet process can be simulated through experiments; and the screentube blockage characteristic change caused by sand outlet in a hydrate exploitation process can be analyzed through analyzing particle size distribution characteristic, a screen tube sand-blocking medium unit pressure, unit and permeability change.

The invention discloses a mine roof and floor water inrush monitoring and prediction system and a mine roof and floor water inrush monitoring and prediction method. The system comprises a ground control room host terminal, an underground site host, a comprehensive cable assembly and a plurality of detection terminals, wherein the underground site host is connected with the ground control room host terminal; the comprehensive cable assembly is connected with the underground site host; the detection terminals are arranged on a roadway wall, a roadway floor or a roadway roof along the mine roadway direction; each detection terminal comprises a controller, a three-dimensional vibration sensor, an electrode and a memory connected with the controller; signal output ends of the three-dimensional vibration sensor and the electrode are connected with a signal input end of the controller; a data communication end of each controller is connected with the underground site host through the comprehensive cable assembly. According to the system and the method, the accuracy and the real-time property of a mine roof and floor water inrush monitoring result can be obviously improved.

The invention discloses a landslide depth displacement monitoring device, which comprises an inclinometer pipe, wherein the inclinometer pipe is inserted on a landslide, and the end part of the inclinometer pipe passes through a potential sliding surface and extends into a drill hole below a bedrock surface; a curved test channel for a signal optical fiber I to pass through is arranged in the inclinometer pipe; the curved test channel comprises a curved support, a plurality of deformation teeth I and a plurality of deformation teeth II which are continuously arranged at the upper side and lower side which are opposite in the curved support; the deformation teeth I and the deformation teeth II are correspondingly arranged in a staggered way; the signal optical fiber I is arranged at the inner part of the curved channel in a penetrating way; at least one row of the corresponding deformation teeth of the deformation teeth I and the deformation teeth II share the same height, pitch and bending curvature of the top part contacted with the signal optical fiber I; the joint of the signal optical fiber I is connected with one end of an optical cable; the other end of the optical cable is led to a monitoring station and is connected with a testing unit; and the testing unit is further connected with an upper processing unit. The landslide depth displacement monitoring device can effectively realize remote monitoring of the landslide depth displacement change.

The invention belongs to the pharmaceutical field, and specifically relates to a preparation method and a detection method for edaravone dimers and tautomers thereof. The preparation method is characterized in that edaravone is dissolved in a solvent; a catalyst is added; the mixture is heated and filtered to obtain an insoluble substance; the substance is washed and dried to obtain a product. The detection method adopts a high performance liquid chromatography method. The preparation method of the invention has convenient operation and easily available initial raw materials, and the detection method is applicable to the detection of edaravone dimers in edaravone raw materials and preparation samples.

The invention provides a double-closed-loop system and a double-closed-loop method for monitoring a museum environment based on an internet of things. The system comprises a wireless sensor module, an information processing module and a monitoring center, wherein the wireless sensor module comprises a sensor node and a cluster head node arranged at a point to be tested, and a father-and-son node is formed between the cluster head node and a non-cluster head node; the cluster head node is connected with the information processing module by a Zigbee wireless communication protocol; the information processing module is used for filtering, fusing and compressing data; and by the two-way communication between Wifi and the monitoring center, the monitoring center can control response equipment remotely, adjust environment parameters, and communicate with a mobile phone of a manager. The system and the method have the advantages that the change of environment parameters can be monitored rapidly, and the parameters can be adjusted rapidly; the response equipment in the environment can respond to the change of the environment parameters rapidly; and due to the double-closed-loop control bya PC (personal computer) at the monitoring center and software at the client side of the mobile phone of the manager, the control precision is higher.

The invention discloses a landslide monitoring system. The landslide monitoring system comprises an inclinometer pipe inserted into a landslide, a power supply system and a first wireless transceiver module, wherein the inclinometer pipe penetrates through a potential sliding surface of the landslide and extends into a drilling hole below a surface of a bed rock body; the inclinometer pipe is internally and continuously provided with curve-shaped testing channels allowing signal optical fibers to pass through; each curve-shaped testing channel comprises multiple A-side deformed teeth and multiple B-side deformed teeth; the testing unit comprises a light time domain reflectometer and a light source-light power meter; one end of a first signal optical fiber is connected to the light time domain reflectometer; a second signal optical fiber is connected to the light source-light power meter; the power supply system comprises a battery pack; and the first wireless transceiver module is wirelessly connected to a second wireless transceiver module. The landslide monitoring system has a simple structure, a rational design, convenience in processing and manufacturing, low cost, a flexible use way, high sensitivity, good use effects, a high practical value, strong adaptability, and capabilities of realizing long-distance monitoring and monitoring change of depth displacement of the landslide efficiently.

The invention discloses a charge testing method in a plasma environment and a testing system. The testing system comprises a chip integrated with MEMS (Micro-electromechanical Systems) and CMOS, and a testing circuit, wherein the chip includes a testing unit consisting of a bi-material cantilever beam temperature-sensitive structure and a structure capable of acquiring plasma density based on electrostatic suction principle; a strain resistor is used as the testing means for acquiring the deformation of the temperature-sensitive structure and a charge collection structure; and the testing circuit is used for measuring the change of the strain resistor. During charge testing, the accumulated charges are tested preliminarily; then, the released charges are re-measured to obviate the influence of an interference factor while only keeping the change influence; and the charge accumulation amount can be calculated. The system can real-time monitor the accumulation amount and the distribution of charges in the time and space domains by using a plurality of testing units arranged in an array manner, thereby providing the possibility for real-time online measurement of the plasma influenceon devices.

The invention provides a fast and reliable file incremental backup method. A system comprises a file incremental backup application system, a file filter driving system and a long-distance storage system. The file incremental backup application system is a main carrier for achieving a strategy, is responsible for scheduling and making the file filter driving system and the long-distance storage system coordinate with each other and comprises rule setting and strategy achieving, the file filter driving system is a core achieving module of the method and is responsible for intercepting generation of change information and log files of files in a file system, and the long-distance storage system is responsible for storing log file information of file changes.

The invention discloses a thin film sensor for detecting carbon dioxide. The sensor comprises a porous film and an indicator and a carrier complex which are attached to the pore passage of the porous film, wherein the indicator can react with hydrogen ions and presents different colors in a protonation state and a deprotonation state; the carrier complex contains positive ions and alkaline negative ions, wherein the positive ions can be chemically connected with the deprotonated indicator in a solid phase; and according to the alkaline negative ions, the pH value in the pore passage is higher than a pKa value of the indicator in the absence of contact of carbon dioxide. According to the thin film sensor disclosed by the invention, the porous film serves as a carrier, and the characteristic that the specific surface area is large is utilized, so that the carbon dioxide can be fully contacted with the indicator, the sensitivity of the sensor is improved, and the response time is reduced. The sensor disclosed by the invention is simple in structure, convenient to use, easy to carry and low in cost and has the advantages of accuracy, rapidness, water disturbance resistance, reaction reversibility and the like, and the requirement on rapid detection of carbon dioxide can be met.

The invention discloses a method for monitoring photoetching exposure condition and alignment precision simultaneously. A rhombic measuring pattern is used for arranging a photoetching-alignment pattern, and the length, width and space period of each rhombus are small enough, so that macroscopic optical measurement can not distinguish all rhombuses from the photoetching-alignment pattern, while microcosmic photoetching can distinguish all rhombuses from the photoetching-alignment pattern; and then, an optical microscope is used for measuring the photoetching exposure condition and the photoetching-alignment precision simultaneously. Therefore, the method not only simplifies processing steps, reduces production cost and shortens production period of silicon chips, but also can monitor the change of exposure energy and the change of exposure focus for monitoring the exposure condition, so as to improve on-line monitoring capability for the exposure condition.

The invention discloses a power transformer working state monitoring method and system. The method comprises the steps that acoustic signals of multiple monitoring points of a transformer are acquiredso that multiple transformer acoustic signal time sequences are obtained; sliding window segmentation is performed on the transformer acoustic signal time sequences so that multiple transformer acoustic signal time sequence sub-segments are obtained, and the correlation coefficient matrix of each transformer acoustic signal time sequence sub-segment is calculated; the singular spectrum entropy ofeach correlation coefficient matrix is calculated, and all the singular spectrum entropies are fused so that a singular spectrum entropy fusion curve of the transformer acoustic signal time sequencesis obtained; the weighted grey correlation degree of the singular spectrum entropy fusion curve of the transformer acoustic signal time sequences and the singular spectrum entropy fusion curve of thecorresponding transformer historical acoustic signal time sequences is calculated; and the working state of the transformer is determined by the weighted grey correlation degree. The monitoring efficiency and the monitoring accuracy of the working state of the power transformer can be enhanced.

The invention provides a DC (direct current) motor speed control method based on hybrid self-adjusting fuzzy PID control. The method comprises following steps: firstly, an actual rotating speed n anda given rotating speed nr of a motor are subjected to comparative calculation, a final deviation e and a deviation change rate ec are obtained, the two deviations are subjected to fuzzification in a fuzzy controller, and E and EC after the fuzzification are given to the fuzzy controller for reasoning work, so that kp1 and ki1 after defuzzification are obtained; parameters in a PI controller are adjusted timely, transient and steady conditions in a control process are distinguished with a switching function, finally, a control result is input into a brushless DC motor to realize rotating speedcontrol, and the rotating speed of the motor is controlled. Furthermore, fuzzy control is adopted and is not required to depend on an accurate mathematical model of the controlled motor, so that the controlled motor is more stable in a control state and the nonlinear condition of the controlled motor can be effectively inhibited.

The invention provides a battery powered overvoltage and undervoltage locking and 28V-voltage stabilization protection circuit, belongs to the field of battery power sources and is applicable to detection fields of industrial site like power supplying of a pre-amplifier. The battery powered overvoltage and undervoltage locking and 28V stable voltage protection circuit comprises a 28V power source, an overvoltage locking unit, a undervoltage locking unit and a voltage stabilization protecting unit, wherein an overvoltage locking is used for a voltage clamp level when battery powered voltage is too high; the battery undervoltage locking unit is used for a voltage clamp level when the battery powered voltage is too low; the voltage stabilization protection circuit is used for stabilizing voltage after the voltage is locked, eliminating voltage change caused by load change and provided with a circuit protection function. The battery powered overvoltage and undervoltage locking and 28V-voltage stabilization protection circuit has the advantages that voltage locking of battery-powered overvoltage and undervoltage can be achieved, and the voltage can be stabilized via the 28V-voltage stabilization protection module.

In order to solve the technical problems that an existing method for testing the surface shape of an optical element in a low-temperature environment is limited by the caliber of an interferometer andtest errors can be caused by deformation of window glass of a vacuum container, the invention provides an optical element surface shape measuring device and method in low-temperature environment, which are accurate, reliable and convenient to operate. The optical element surface shape measuring device comprises a wavefront sensor, a collimator and a vacuum container. Window glass is arranged on the collimator, a temperature control cover is arranged in the vacuum container, and a liquid nitrogen heat sink is arranged on the temperature control cover. The temperature control cover and the liquid nitrogen heat sink jointly provide a low-temperature environment required by the design for the to-be-tested optical element; the collimator and the vacuum container are connected in a sealed modeto form a sealed cavity together. The wave-front sensor is positioned outside the vacuum container and corresponds to the window glass on the collimator in position; the wavefront sensor not only canoutput light beams, but also can detect the light beams emitted from the window glass. Compared with a traditional interference measurement method, the device and the method are high in airflow resistance and vibration resistance.

The invention belongs to the technical field of wafer wet processing in the semiconductor industry and specifically relates to a wafer soaking device which meets wafer soaking requirements. A liquid storage tank and an electric actuator are arranged on a bottom board; a wafer box is arranged in the liquid storage tank; one end of a lifting connection rod is connected with the output end of the electric actuator, and the other end is inserted into the liquid storage tank and is hinged with the wafer box; the tank groove of the upper portion of the liquid storage tank is provided with a wafer feeding window for allowing a mechanical arm to feed the wafers into the wafer box; the electric actuator drives the lifting connection rod to drive the wafer box to go up and down, so that the wafer box is allowed to rise to the height corresponding to the wafer feeding window to facilitate to fetch and release the wafers, or the wafer box is allowed to decline and be immersed into chemical liquid for soaking the wafers; the inner upper and lower two sides of the wafer feeding window are respectively provided with an air blowpipe arranged on the liquid storage tank; the air blowpipes are communicated with an air source; and each air blowpipe is uniformly provided with a plurality of air mouths. The wafer soaking device realizes uniformity of soaking time of each signal wafer and waiting time after the wafer is taken out, and realizes higher requirements for wafer soaking in the wet processing process.

The invention discloses a hydrolysable impurity compound of valsartan, and discloses a preparation method and a detection method of the hydrolysable impurity compound, and use of the hydrolysable impurity compound for serving as an impurity reference substance for determination of valsartan related substances. Through preparation and structural confirmation of the compound, the reference substance is provided for analysis of the valsartan related substances, so as to improve the quality standard of valsartan, and provide important guiding significance for safe medication of valsartan.

The invention provides a contamination observation system of power equipment. A front-end current sensor mounted on the surface of an insulator transmits the collected leakage current to a leakage current collection circuit through a double-screened cable after the collected leakage current passes through a signal conditioning and protection circuit; an industrial computer controls a leakage collection circuit to collect leakage current from different passages; signals of a meteorological sensor are collected by a meteorological data collector and then transmitted to the industrial computer through a communication interface; and the industrial computer transmits the leakage current data and the meteorological data to a remote server through a data communication module after coding the data in different coding manners. The contamination observation system can reflect the current contamination state and meteorological conditions in real time through high-time-resolution sampling so as to achieve the close connection between real-time insulator leakage current monitoring and meteorological factors. According to the two types of monitoring data, the contamination observation system can execute contamination analysis on the power equipment so as to reflect the leakage current condition and ambient meteorological environment of the power equipment in real time, thereby improving the power equipment real-time monitoring accuracy.