66results about How to "Real-time sampling" patented technology

The invention relates to the field of an alternated current inverter, in particular to a method for detecting power failure of a power grid for a three-phase uninterruptable power supply. The method comprises the following steps: sampling a full-wave rectified three-phase power grid voltage at real time; sampling for 180 times in a power frequency period; judging if the accumulation of the three-phase instantaneous voltage at each time is lower than a preset power failure detection point; and if the three-phase input voltage of UPS (uninterruptable power supply) is low-voltage and abnormal for 2ms, confirming that the power grid is in power failure. By utilizing the characteristic of three-phase power grid that the accumulation of the absolute values of the three-phase instantaneous voltages at any moment is in the scope of 1.732-2 times of peak voltages, the method can be used for accurately and quickly detecting the three-phase power failure. The detection time is stable and the system reliability is strong.

The invention discloses an intelligent wireless sensing network node based on piezoelectric energy recovery, comprising an energy recovery unit, a resistance strain sensor signal conditioning unit and a wireless transceiving and data processing unit. A self-powered wireless sensing system is realized by utilizing piezoelectric energy recovery without external energy, battery replacing or maintenance, the system has the power consumption as low as 4.9MW, and the real-time monitoring performance is ensured at the same time. An engineering structure health monitoring wireless sensing network established by the intelligent wireless sensing network node based on energy self-supplying can replace a traditional battery supply monitoring network system, and has the advantages of light weight, small size, no environment pollution, no need of replacing battery, and the like. The invention also discloses a piezoelectric transducer comprising a cantilever beam, wherein the other end of the cantilever beam is provided with a mass block, at least one piezoelectric piece is attached to the cantilever beam, and the thickness of the end of the cantilever beam connected with an external structure is greater than the thickness of the end provided with the mass block.

The invention relates to fault recorder utilizing a travelling wave fault location algorithm. The fault recorder utilizing the travelling wave fault location algorithm comprises a voltage transmitter, a current transmitter, a wave recording access unit, a fault wave recording unit, a travelling wave fault location unit, and a central processing unit (CPU) plugin. The voltage transmitter can convert input voltage signals in an electric system into analogue voltage signals. The current transmitter converts input current signals in the electric system into two path analogue current signals. The wave recoding access unit converts the analogue voltage signals and the analogue current signals into digital voltage signals and digital current signals and the like. The fault wave recording unit samples the digital voltage signals and the digital current signals and the like. The travelling wave fault location unit converts the analogue current signals analog to digital (A / D) into high-speed digital current signals and the like. The CPU plugin receives traveling wave data and wave recording data and calculates a fault location according to the traveling wave data and wave recording. The fault recorder utilizing the travelling wave fault location algorithm can integrate fault recording and travelling wave fault location. Hardware investment of electric system high voltage transmission lines is reduced and time of repairing faults can be shortened.

The present invention relates to monitoring of deformation of a power distribution network transformer low-voltage winding, specifically to a power distribution network transformer low-voltage winding deformation on-line monitoring device and method. The invention solves the problem that conventional off-line detecting technologies cannot monitor the transformer winding deformation state timely. The monitoring device comprises an industrial control computer, a pulse signal generator, a capacitive divider, a current transformer, and a data acquisition module. The monitoring method comprises the steps of a) detection signal injection; b) response signal detection; c) data acquisition; and d) analysis and determination. According to the monitoring device and method, the hardware structure is simple; the method is effective; the work is reliable; and the on-line monitoring of the deformation of the power distribution network transformer low-voltage winding is realized.

A pile management system includes an electromotion execution device and an outer charging device and an outer discharging device, and which is characterized in that: it is comprised by a data processing unit, a charging balance regulation executing unit, a discharge control execution unit, a battery state sampling unit, a system power supply identification reference unit, a charging state indicating unit. Its operation method is as follow: a CPU analyses the voltage of each cell of the pile and then adjusts the balance of each cell. The advantage and the technical effect of the invention rests with realizing real time sampling for the voltage of each cell of the pile and effective variable current adjusting to each cell, keeping balance of the same in charge and discharge, so that the service life can be prolonged, and the invention has widely application prospect.

The invention relates to a flue section matrix type real-time synchronous on-line sampling analysis device and a sampling method thereof. The flue section matrix type real-time synchronous on-line sampling analysis device comprises a flue, a plurality of sampling pipes, a sampling distributor and a flue gas analysis instrument; one end of each sampling pipe is arranged in the flue and the other end of the sampling pipe is connected with the sampling distributor; the sampling distributor is connected with the flue gas analysis instrument; the sampling distributor comprises a smoke dust filter,a two-position three-way electromagnetic valve, a sampling flue gas collecting pipe, an emptying flue gas collecting pipe, a flue gas sampling pump and a flue gas emptying pump; the sampling pipes areconnected with the smoke dust filter; the smoke dust filter is connected with the two-position three-way electromagnetic valve; the two-position three-way electromagnetic valve is connected with thesampling flue gas collecting pipe; the sampling flue gas collecting pipe is connected with the flue gas sampling pump; the two-position three-way electromagnetic valve is connected with the emptying flue gas collecting pipe; and the emptying flue gas collecting pipe is connected with the flue gas emptying pump. The flue section matrix type real-time synchronous on-line sampling analysis device realizes real-time synchronous on-line sampling analysis of the whole flue section and guarantees real-time synchronization of sampling.

The invention relates to an automatic water sample collecting device for a rainwater inspection well. The automatic water sample collecting device for the rainwater inspection well can be used for automatically collecting a water sample in a rainwater pipeline in a catchment basin, and consists of baffle plates, a shaft-end pressing plate, a rotary shaft, a key, an outer vertical column, second baffle plates, a thrust ball bearing, a travel switch, a fixed collision block, a speed reducer, a direct current motor, a storage battery, a bottom plate, a third baffle plate, a bracket, a pipeline, a pipeline bracket, a rotary table, a cup base, a lifting lug, a side plate, a top plate, a telescopic rod bracket, a telescopic rod, a floating ball valve, a water pump and a weir height adjustable water collector. The automatic water sample collecting device is applicable to sampling of rainwater runoff collected by the rainwater inspection well in various underlying surface types, is matched with the inspection well, and meets a sampling requirement for research on non-point source pollution to a large extent.

The invention discloses an alarm type thermal fuse-link which comprises a shell, a first electrode and a second electrode which are arranged in the shell and an alloy fuse-link which is connected with the first electrode and the second electrode. Besides, an alarm electrode is arranged aside the first electrode or the second electrode while a contracting agent is packed around the alloy fuse-link. When the alloy fuse-link automatically fuses caused by the overheating alarm type thermal fuse-link, the fused alloy fusing material contacts towards the electrode direction at two ends and reunitesat the position of the electrode under the action of the surface tension and the contracting agent. Due to the alarm electrode arranged on one end, the reunited fused alloy fusing material connects the alarm electrode with the electrode so as to form a close contact to output a normally closed contact signal. The alarm type thermal fuse-link of the invention can output an alarm remote-control signal while can automatically fuse the circuit by the fuse.

The invention relates to a real-time weld seam monitoring method for an electric welding machine. The method comprises the following steps: (1) a Hall current sensor converts a welding current into a corresponding voltage signal; (2) a DSP controller acquires the signal which is filtered, and finishes A/D conversion of an analogue signal, then outputs the analogue signal in two paths, one path of the signal is operated by a scheduled algorithm in an event manager module to obtain an output control signal which is used for controlling an actuator to correct an error, and the other path of the signal is sent to a PC through a serial communication module of the DSP; and (3) the PC is taken as an upper computer to perform various data processing, data storage and graphical display of the welding current, thus achieving real-time monitoring of the running state during the whole welding procedure. The real-time weld seam monitoring method can help realize real-time sampling and high-speed transmission of the welding current, and has better real-time characteristic and high control precision.

The invention discloses a device for simulating coast reservoir pollutant migration and a use method of the device. The device comprises a planar water trough, a fresh water supply system, a saline water supply system, a base flow simulation system, a sampling system and a tidal wave generator, wherein the fresh water supply system is connected with the head of the planar water trough; the salinewater supply system is connected with the tail of the planar water trough; the sampling system is connected with the body of the planar water trough; the base flow simulation system is positioned at the bottom of the planar water trough; the tidal wave generator is connected with the tail of the planar water trough. Compared with the prior art, migration of coast reservoir pollutants can be precisely simulated, not only are variable levels of fresh water and saline water monitored in real time, but also water inside the water trough is sampled in real time under a condition that a good overallsimulation environment is ensured, and migration rules of the pollutants at different flows, water levels and tidal water heads can be detected.

The invention relates to a reservoir phosphorus release monitoring system and method. The monitoring system comprises a sampling platform capable of floating on the water surface of a reservoir and anonline monitoring station house established beside the reservoir, wherein online monitoring equipment is arranged in the online monitoring station house; the sampling platform is connected with a plurality of sampling pumps; all the sampling pumps are located below the sampling platform to fall into reservoir water, all the sampling pumps have height difference in the vertical direction so as toconduct sampling at different depths, and water outlets of all the sampling pumps are connected with the online monitoring equipment in the online monitoring station house through sampling pipelines so as to monitor water samples at different depths. According to the invention, the overwater sampling platform serves as a carrier, the sampling pumps are carried on the sampling platform according todifferent depths, and water samples with different water depths can be conveyed into the online monitoring equipment through the sampling pumps so as to be monitored. The system is simple in structure, reservoir water can be conveniently sampled and monitored at different depths in real time, and the height difference between the sampling pumps can be preset in advance according to the actual water depth of the reservoir.

The invention discloses a rapid quantitative monitoring device for environmental parameters of a coal mine fire zone. The device comprises an infrared temperature sensing device, wherein the back part of the infrared temperature sensing device is connected with a rapid drill hole sealing device; the back end of the infrared temperature sensing device is connected with a detecting device; one end of a hose is connected with the back end of a hollow steel pipe, and the other end of the hose is connected with an inlet of an air room in the detecting device; the front fixed end of the rapid drill hole sealing device is connected with the back end of a floral tube which is sleeved outside the hollow steel pipe; an expansion capsule is arranged between the front fixed end and the back fixed end; a bearing, provided with a stationary shaft, is arranged in the fixed end; the stationary shaft is connected with the hollow steel pipe through external threads; and a rotating disk is connected with the hollow steel pipe behind the back fixed end through external threads. The rapid quantitative monitoring device is suitable for monitoring the temperature of an underground fire zone of a coal mine and concentrations of a plurality of index gases, and has the advantages of simple technique, comprehensive gas detection and reliability in parameter monitoring.

The invention relates to a dynamic signal test and analysis system of a universal serial bus interface. The dynamic signal test and analysis system comprises a controllable bridge supply circuit, a sensor and a programmable control signal amplifier, wherein the controllable bridge supply circuit, the sensor, the programmable control signal amplifier, an analog filter, a 16-bit analog to digital converter, a DSP (Digital Signal Processor) data processor, a UART (Universal Asynchronous Receiver/Transmitter) to USB (Universal Serial Bus) chip, a USB HUB and a computer are sequentially connected in series; the controllable bridge supply circuit, the programmable control signal amplifier, a 16-bit digital to analog converter, a comparator, the 16-bit analog to digital converter, the DSP data processor, the UART to USB chip, the USBHUB and the computer are sequentially connected with a single chip microcomputer in parallel; a subtracter and the 16-bit digital to analog converter are connected with the comparator in parallel; and the computer is provided with signal test and analysis software. The dynamic signal test and analysis system has the advantages of simplicity and convenience in test, high test precision and capacity of multiple sampling channels; and by adopting the dynamic signal test and analysis system, the sampling frequency is not reduced, and the multiple-channel, high-speed and real-time sampling can be realized.

The invention relates to a gas-liquid-solid three-phase reaction bypass monitoring device which comprises a transverse cylindrical monitoring cavity, an eccentric reducer, a tuning fork density gaugeand a pH (potential of hydrogen) meter. A density gauge placing pipe is arranged on the upper side of the monitoring cavity in the vertical direction, the tuning fork density gauge is inserted in thedensity gauge placing pipe, a measurement end of the density gauge extends into the monitoring cavity, a gas-phase branch pipe is arranged on a side wall of the upper side of the density gauge placingpipe, the other end of the gas-phase branch pipe is communicated with a three-phase reactor, a discharge pipe is arranged on the lower side of the monitoring cavity in the vertical direction, and thebottom of the discharge pipe is communicated with the three-phase reactor; a side wall of the monitoring cavity is communicated with a large-end section of the eccentric reducer, and a small-end section of the eccentric reducer is communicated with the three-phase reactor; a pH meter placing pipe is arranged on the upper side of the monitoring cavity, and the pH meter is inserted in the pH meterplacing pipe. The gas-liquid-solid three-phase reaction bypass monitoring device has the advantages that solid-to-liquid ratio values and pH values of reaction systems can be accurately monitored by the gas-liquid-solid three-phase reaction bypass monitoring device, samples can be taken via a sample taking opening, components can be analyzed, contaminants further can be removed for the tuning forkdensity gauge and the pH meter, the tuning fork density gauge and the pH meter further can be cleaned, and accordingly the safety and the accuracy of processes can be enhanced.

The invention provides an LLC resonant converter, and a control circuit and a resonance current sampling circuit thereof. An inductor is connected with a resonant cavity of the LLC resonant converterto sense a resonance current of the resonant cavity and convert the resonance current to an AC induction voltage so that a voltage conversion sub-circuit converts the AC induction voltage to a DC voltage and outputs the DC voltage to a controller; and therefore, real-time sampling of the resonance current is realized, basis is provided for further control of the controller, and through the controlof a switch-off current of a switch tube, the switching loss of a bridge arm switch can be reduced, and the control accuracy of the controller is improved.

The invention discloses an intelligent detection instrument with a dirt interception and discharge structure and for pipeline installation. The intelligent detection instrument comprises a flow monitor, a sampling pipe, a water outlet pipe and a disc, the middle position of the lower end of the flow monitor is provided with a shunt pipe, and the inner side wall of a protective cover is fixedly provided with a mineral substance detection rod; and the sampling pipe is installed in a positioning frame in a penetrating mode, a side electric telescopic rod is installed on the inner side face of a protective cover, a water outlet pipe is fixedly connected to the interior of a flow dividing pipe, a disc is fixedly installed outside a transmission rotating shaft, and a driving rotating shaft is rotationally connected to the interior of the protective cover. According to the intelligent detection instrument with the dirt interception and discharge structure and for pipeline installation, novel structural design is adopted, water flow sampling detection can be carried out while water flow is monitored, a rotary continuous sampling structure is arranged in the device, water flow sampling and detection result analysis and comparison can be conveniently carried out many times, and the water sampling detection effect of the device is improved.

The invention discloses a method for determining the hardness of a blank slice for dry granulation. The method comprises the following steps: setting the following determination parameters of a physical determinator: test pattern, speed before test, test speed, speed after test, deformation quantity, trigger mode, trigger force and data acquisition rate; starting the physical determinator to determine the stress change during deformation of the blank slice for dry granulation and drawing a stress-compression time chart according to the stress change; obtaining the hardness value of the tested blank slice according to the peak stress displayed in the chart. The method has the advantages of simplicity in operation, quickness and accuracy in testing, high sensitivity, strong operability, and the like, fills in a gap in determination of the hardness of the blank slice for dry granulation, provides a technical support for objective judgement of the quality condition of the blank slice for dry granulation and realization of online control of the quality of an intermediate, and also provides a data-based evaluation basis for reasonably screening the dry granulation prescription and the process control parameters.

The invention relates to a sampling device and method for wet-process lead recycling, dissolving and leaching procedures. When sampling analysis is conducted, a cooling water outlet valve and a cooling water inlet valve which are arranged on a jacketed closed glass pot are switched on, an emptying valve and a discharging valve are switched off, a water flushing pump, a water flushing stop valve and a sampling and feeding stop valve are started and switched on sequentially, then sampling starts to be conducted, and when a sample in a reaction kettle enters the jacketed closed glass pot, sampling is finished. By means of the device and method, real-time sampling can be achieved, the material composition and reaction conditions in the kettle are not affected, and meanwhile the condition that great damage is caused to human body health due to the fact that lead and lead compounds can be brought out by water vapor when sampling analysis is conducted cannot occur, so that the human body health is protected; the reaction time is shortened, and the recycling efficiency is improved.