34results about How to "Real-time monitoring of stability" patented technology

The invention relates to an efficient welding method and device for an arc-assisted laser thin-walled welding titanium pipe. By taking a laser as a main heat source and a tungsten inert gas (TIG) arcas an auxiliary heat source, unfilled full penetration linear butt weld welding is implemented on a butt part of a circular thin-walled titanium pipe in the axis direction of the circular thin-walledtitanium pipe formed by curling a flat thin-walled strip-shaped titanium plate or titanium strip. Compared with the prior art, the efficient welding method and device adopt a heat source arrangement method that the preheating TIG is located in front and the laser forming a weld pool is located behind, and adopt relatively small TIG arc current to preheat a welded titanium pipe, so that the laser absorptivity is improved; laser beams with relatively high power act on the preheated titanium pipe and the molten pool is formed, so that the penetration capacity is improved; and with the cooperationof the large laser positive defocusing amount and optimized welding parameters, the laser energy density of the surface of the welded titanium pipe is reduced, splashing at the inner side of the welded titanium pipe in the welding process is eliminated, and the butt gap disturbance generated in the pipe manufacturing process is met.

The invention relates to a multipoint displacement testing method based on a fiber grating sensing technology. The invention aims to provide a multipoint displacement testing method based on the fibergrating sensing technology, and the method is simple to implement, high in measurement accuracy and capable of realizing on-line monitoring. The technical scheme of the invention is a multipoint displacement testing method based on the fiber grating sensing technology. The testing method is characterized by providing a carrier, an inclinometer, a fiber grating string I and a fiber grating stringII; installing the inclinometer at one end of a carrier to be used as a displacement 0 point; symmetrically arranging the fiber grating string I and the fiber grating string II on two sides of the carrier with respect to a central line of the carrier; measuring the central wavelengths lambda Bi0 and lambda'Bi0 of the fiber grating string I and the fiber grating string as initial values; and acquiring an initial angle theta0 of the inclinometer. The testing method disclosed by the invention is suitable for the technical fields of fiber grating sensing and engineering measurement.

The invention relates to a centralized network monitoring and management system comprising a basic resource layer, a network management layer and a service management layer which are sequentially connected. The basic resource layer is used for implementing unified docking with service resources; the network management layer is used for realizing monitoring and management of hardware and software service modules in the network; and the service management layer is used for realizing management of services in the network. Compared with the prior art, the centralized network monitoring and management system has the advantage of real-time and unified monitoring and management on the reliability and stability of the network.

The invention discloses a real-time monitoring method for stability of a muddy sea channel side slope. The real-time monitoring method comprises steps of: placing a buoy at the edge of the channel; mounting an acoustic profile detection system on the buoy; emitting sound waves to the seabed through the sediment layer of the seabed channel side slope by the acoustic profile detection system; receiving seabed sound waves and converting into a sediment profile acoustic image by a receiving system; transmitting the sediment acoustic image signal to a monitoring center through a transmission system; and monitoring and analyzing the stability of the channel side slope in real-time after the monitoring center processes the transmitted acoustic image. The real-time monitoring method for the stability of the muddy seabed channel side slope provided by the invention does not affect the normal operation of the ship, and realizes real-time monitoring in all weather.

The invention provides a power capacity management system and management method based on PDU monitoring, and the system comprises a data collection server which is configured to be used for collectingdata from a plurality of power distribution units; a data storage device which is configured to store the data acquired by the data acquisition server; and a monitoring server which is configured toexecute corresponding monitoring operation according to the data stored in the data storage device. The invention discloses a monitoring management system. An efficient power distribution unit monitoring management system is constructed; the real-time operation power of various IT equipment in the data center can be effectively monitored and counted, the equipment capable of being put on shelves in the data center machine room is calculated based on the actual power of the various IT equipment, the power utilization rate of the machine room is improved while the power utilization safety of themachine room is ensured, and fine management of the power capacity of the data center machine room is achieved.

The invention relates to a method and a system for judging the reliability of a distributed cluster through a weighted entropy, and belongs to the field of distributed cluster reliability. The methodcomprises the steps of previously performing weighting for log events with different severities; then performing statistics on quantities of different types of system logs of nodes of the cluster in atime period by utilizing a sliding window; calculating error rates of the nodes; according to the error rates, calculating the reliability weighted entropy of the cluster; and finally according to afluctuation range, judging the stability of the cluster. Through the method, system reliability is quantized; the reliability of the whole cluster not only can be quantitatively judged through simpledeployment but also can be monitored in real time to obtain environmental change of the cluster in time; and when the reliability of the cluster has a relatively great fluctuation, corresponding measures can be adopted in time for processing.

The invention discloses a high and steep slope earthquake instability early warning method under the interaction of a pier stud-pile-soil foundation and application of the high and steep slope earthquake instability early warning method. The high and steep slope earthquake instability early warning method comprises the steps that monitoring rods are arranged between a pier pile foundation and an anti-slide pile of a high and steep slope, from the position above the anti-slide pile to a slope top, from the position below the anti-slide pile to a slope toe and the like; earthquake horizontal acceleration and soil pressure of a soil body and a bending moment value of the monitoring rods are measured through horizontal accelerometers, soil pressure boxes and strain gauges on the monitoring rods; and then data are transmitted to a remote server through a data transmission unit, the stability condition of the high and steep slope is monitored in real time, and early warning is provided for management personnel through an earthquake occurrence alarm unit and a post-earthquake alarm unit. According to the invention, real-time post-earthquake monitoring is carried out on the complex geological condition under the interaction of the pier stud-pile-soil foundation of the high and steep slope, the cost is low, the service life is long, the operation is convenient, and the earthquake stability of the complex underground space of the high and steep slope can be effectively evaluated.

According to the rapid blocking method and system for the dam notch, the notch structure and water flow parameters are monitored on site, the evolution trend of the notch is calculated in combination with dam material mechanics and geometric parameters, and the size and the assembly position of a blocking body are determined according to the time condition. According to the plugging body, a hexahedral hollow box cage is modularly assembled at the position, with the small flow speed, of the upstream of a notch, and then vector propulsion is combined with water flow dragging force to be close to the notch from the upstream; the upstream end of the plugging body is located above the water surface, and the downstream end of the plugging body sinks to the upstream side of the underwater notch. According to the position and posture data collected in real time, the plugging body is tightly attached to the wall face of the dam on the upstream of the notch under the combined action of water flow and self driving through edge calculation or wired fine control of the valve and the driving device, then a ventilation or water inlet valve of the underwater box cage is closed, and sand and stone are thrown and filled on the downstream of the plugging body for stabilization.

The invention discloses a underwater portable wireless optical communication equipment and system, relates to the field of underwater wireless optical communication, and aims to solve the problems that an underwater wireless optical communication channel is extremely unstable and underwater information is difficult to continuously and efficiently transmit due to the fact that existing underwater wireless optical communication equipment cannot be stably aligned with overwater wireless optical communication equipment. According to the scheme, the equipment comprises a wearable device and a suspension device, the suspension device is connected with the wearable device in a wired or wireless mode, blue, green and red light emitted by the suspension device is received by a receiving device of overwater communication equipment, and wireless optical communication between the underwater wireless optical communication equipment and the overwater communication equipment is achieved. The suspension device is not affected by irregular motion of a frogman, and optical communication alignment and stability between the suspension device and the overwater communication equipment are better guaranteed. the wireless optical communication system can control the transmitting module to adjust the angle and the direction in real time, so that the transmitting module is aligned with the receiving device of the overwater optical communication equipment at any time, the stability of an optical communication channel is ensured, and the transmission efficiency of optical communication is improved.

The invention discloses an animal coil special for a liver ECS experiment. The animal coil comprises an upper skeleton and a lower skeleton, the upper skeleton is detachably connected with the lower skeleton, the upper skeleton and the lower skeleton form a cylindrical structure, and antenna units are both arranged in the upper skeleton and the lower skeleton. The antenna unit positioned in the upper skeleton and the antenna unit positioned in the lower skeleton form a radio frequency coil, and a calibration mold is also arranged on the lower skeleton and is located at the side, close to the upper skeleton, of the lower skeleton. A channel for placing animals is formed between the calibration mold and the inner wall of the upper skeleton, and the upper skeleton is an arc-shaped plate. Thecalibration mold and the animal coil are designed together to realize the synchronization of a measurement process and the animal scanning, so that the imaging of a tracer sample solution and a testedobject can be completed at the same time through the one-time scanning, the measurement stability of the system can be monitored in real time, and the subsequent data analysis and comparison are facilitated.

The invention discloses a soft operation arm based on a cross-modal tactile sensor and a bubble driver. The soft operation arm comprises the cross-modal tactile sensor, a soft pneumatic finger, a square fixing plate, a triangular supporting plate and the bubble driver. The mechanical arm has safe man-machine interactivity and infinite degree of freedom, and the motion ability of the mechanical arm is improved; meanwhile, a soft pneumatic finger with a transmembrane state tactile sensing function is carried, so that self-adaptive grabbing can be realized, and multifunctional sensing can be realized by utilizing a transmembrane state tactile sensor, and whether the soft manipulator is in contact with an object or not can be sensed; sensing whether the soft pneumatic finger successfully grabs the object or not, and monitoring the grabbing stability of the object in real time in the process of grabbing and carrying the object; and the contact force in the grabbing process can be sensed, and the output grabbing force can be accurately controlled, so that safe grabbing of an object is realized.

The invention discloses a method for improving the on-line calibration accuracy of an AC sampling device. The method comprises the steps of (1) connecting AC voltage and AC current into an alternating current sampling calibration device, (2) carrying out rapid sampling on the connected AC voltage and AC current and storing obtained digital signal quantity in a stack mode, (3) using digital signal processing technology, carrying out one time of computing processing per 1/2T, carrying out comparison with the measurement value of a front 1/2T, and judging whether electricity which flows in jumps or not in the time 1/2T, (4) capturing the stable input of the AC voltage and current through the method, if the electricity does not jump, judging that the current is stable, carrying out weighted average processing on measuring values of repeated DSP calculation, and obtaining a final measuring value, (5) comparing the final measuring value with the measuring value of the AC sampling device, and calculating the sampling error of the AC sampling device. According to the method, the working efficiency and safety of working are raised, and the test precision is high.

The invention relates to a coal-rock interface stability measuring device with a fiber grating composite structure. The coal-rock interface stability measuring device comprises an axial pressure gauge, an anchor rod, fiber grating strain sensors, fiber grating strain gauges, an external optical cable protective shell, an optical cable, a photoelectric detector and a fiber grating demodulator, wherein the axial pressure gauge comprises a pressure elastic sheet, the fiber grating strain gauges and a pressure transfer column; when the pressure elastic sheet receives axial pressure, the pressure is transferred to the fiber grating strain gauges through the pressure transfer column by the pressure elastic sheet; four fiber grating strain gauges connected in series are connected to a first optical fiber channel of the anchor rod in series. Four optical fibers are arranged around the anchor rod, each optical fiber is connected to seven fiber grating strain sensors to sense surrounding strain,the four optical fibers and the external optical cable are connected in the external optical cable protective shell through flanges, a pressure signal is input into the fiber grating demodulator through the optical cable and the photoelectric detector for demodulation, so that the coal-rock interface stability is monitored in real time.