65results about How to "Avoid state" patented technology

The invention discloses a method for controlling channel access of a wireless sensor network. A base station node and each sensor node adopt a time frame structure with different lengths of time frame, so that the sensor nodes can reserve different time slots by dispatching to carry out data packet transmission, thereby not only reducing collision probability of forwarding data packets among sensor nodes in a high-density monitoring area and improving the utilization rate of wireless channel, but also effectively avoiding overhearing in the wireless sensor network and frequent status switching of a transceiver; therefore, the sensor nodes can be in dormancy status as fully as possible during idle transmission so as to greatly reduce energy consumption under the high-loading network condition and have good energy efficiency. A path reserve mechanism can reserve a multi-hop time slot in advance along data packet forwarding direction in time slot reservation phase, according to the time frame synchronizing characteristics of the sensor nodes on a forwarding path, thereby effectively avoiding end-to-end transmission delay of single data packet caused by intermittent transmission of data packets on the forwarding path.

The invention provides a remote checking and monitoring system for electrical energy measuring instrument, the system is composed of a local unit, a local computer, a remote computer; a local display unit and a remote communication unit are connected with a microprocessor unit; the local computer and the remote computer are connected with the remote communication unit; the secondary voltage of a voltage transformer and the secondary current of a current transformer are connected with a checked ammeter and a standard ammeter in the local unit at a same time. The invention has the advantages that: firstly, an omni-bearing test for the whole electrical energy measuring system can be realized; secondly, a real-time on-line test for the electrical energy measuring system is realized; thirdly, the invention is provided with a remote communication function; fourthly, the invention can be interfaced with electrical energy measuring instruments of different types and from different factories; fifthly, the problems existing in the electrical energy measuring work of electrical customers can be accurately grasped.

The invention discloses a car controller flash control method and device and a car bus system. At the time of controlling ECU flash, a preprogramming control instruction is sent to all ECUs in a CAN bus system; according to response messages fed back by the ECUs, it is judged that the corresponding ECUs enter a preprogramming phase; when the response messages fed back by all the ECUs are received, all the ECUs are controlled to conduct flash simultaneously; after all the ECUs finish flashing, all the ECUs are controlled to conduct processing after programming. As a result, the phenomenon that the state of the ECU conducting flash changes and even the flash fails due to the fact that another ECU enters the preprogramming phase is avoided, simultaneous flash of all the ECUs is realized, time consumed for application flash is greatly shortened for the whole CAN bus system, and vehicle generation and testing efficiency are improved.

The invention discloses a defrosting method of an air conditioner. The defrosting method comprises the following steps: (S1) the operation time M of a compressor is detector; (S2) when the M is greater than M1, the temperature T of a pipe on an outdoor condenser or an indoor evaporator is detected to determine a maximal value Tmax; (S3) the needed time t of each reduction of the Tmax by delta T DEG C is detected, and is compared with a first predetermined value tt1 and a second predetermined value tt2; (S4) when the t is greater than the tt1 and smaller than the tt2, and the M is not smaller than the M2, the air conditioner enters a defrosting phase; and (S5) in the defrosting phase, when the air conditioner operates by the defrosting time DT or detects a defrosting quit signal, the defrosting is finished, the step S1 is returned to, and the operation is recycled like this. According to the defrosting method of the air conditioner disclosed by the invention, the defrosting of the air conditioner in the frosting state can be guaranteed, so that the no-frost defrosting condition in the heating operation process of the air conditioner is reduced, the effective heating operation time is prolonged, and the heating quantity is increased.

The invention discloses an OTDR (optical time domain reflectometry) device and method based on multi-wavelength pulse optical signals. The device and the method are used for detecting an optical fiber to be detected. The device has the advantages that compared with a traditional OTDR, large dynamic range test can be simply realized based on the multi-wavelength pulse optical signals, different distances of the optical fiber are measured by the aid of different wavelengths, single-wavelength pulse saturation or too low signal-to-noise ratio can be avoided, measuring time is saved as compared with a multiple acquisition OTDR or a continuous acquisition OTDR, the device has larger measuring distance and resolution ratio, measurement between wavelengths is independently performed, a test device can run in different states, and multifunctional test is realized.

The invention provides an acquiring method and device for state information of an optical module. The method comprises the steps that a signal for indicating the on-site state of the optical module is acquired, and when the signal of the on-site state indicates that the optical module is on site, locally-stored state information of the optical module is acquired. By means of the acquiring method and device, the problems that in the related technology, when an optical module is severely abnormal, consequently, the state information such as an interrupt signal cannot be correctly sent out, or the reporting accuracy of the state information of the optical module is low due to the mistaken reporting, caused by outside interference, of the interrupt signal when the optical module is not inserted to a single plate are solved.

The invention provides a clock data recovery circuit, a data reception apparatus and a data transmission and reception system. The clock data recovery circuit includes: an oscillator that outputs a clock signal; a phase comparator that outputs a signal corresponding to a phase difference between an input reception data signal and the clock signal; a divider that outputs a feedback clock signal; a first variable delay circuit that outputs a delay data signal; a second variable delay circuit that outputs a delay feedback clock signal; a frequency phase comparator that outputs a signal corresponding to a frequency difference and a phase difference between the delay data signal and the delay feedback clock signal; a lock detector that outputs a determination signal indicating whether or not the frequency difference and the phase difference are within a predetermined range; and a multiplexer that receives the determination signal and select a signal of the phase comparator and a signal of the frequency phase comparator.

This invention relates to a fast booking out of multiple access methods, including: central control node has been successful under the current access and the number of nodes installed idle channel resources of the competition slot number; center control nodes in the first or second Channel announced appointments, whit the mentioned competition slot; nodes go to compete booking in the first channel then shoe to, the second channel; Center control nodes receive the booked on the first signal channel, receive at the second channel at the same time access results and the success of nodes to access the distribution channel resources; each node in the distribution channel resources were Send business groups without conflict. This invention effectively eliminate the signal propagation delay channel throughput of the adverse effects and reduce the appointment of hidden terminal and exposed terminals, packet transmission in the business also eliminates collisions, particularly suitable for the transmission delay as a communication link on the use of Channel Access Multiple Access Method.

The invention discloses a voice detection method and device, a prediction model training method and device, equipment and a medium, and belongs to the technical field of voice interaction. The invention relates to a multi-mode voice end point detection method, which comprises the following steps: identifying a shot face image through a model so as to predict whether a user has an intention of continuing speaking or not, and judging whether a collected audio signal is a voice end point or not by combining a prediction result. In addition, the characteristics of the visual mode of the face imageare fused for detection on the basis of acoustic characteristics, and whether the voice signal is a voice end point or not can be accurately judged by utilizing the face image even if the backgroundnoise is very strong or the user pauses during speaking, so that the interference caused by the background noise and speaking pauses is avoided. Therefore, the problem that the voice interaction is detected to be in an end state too late or too early due to interference of background noise and speaking pause is avoided, and the accuracy of detecting the voice end point is improved.

The invention relates to a power conversion system based on energy storage of a lithium battery and a control method of the power conversion system, wherein a lithium battery system is connected to a direct-current end of a converter and is formed by the serial and parallel connection of lithium battery single bodies, and the voltage of the lithium battery system formed by serial and parallel connection is not lower than 1.633 times of a voltage level of a grid system. In the invention, an LCL (inductance capacitance inductance) filter formed by tree groups of series inductors and three capacitors is adopted, every two inductors are connected in series into one inductor group, one end of the each three inductor groups is connected to a three-phase alternating-current output terminal of the converter, respectively, and the other end of the each three inductor groups is respectively connected to a power grid; one ends of the three capacitors are connected with one another to form a common terminal, and the other ends of the three capacitors are respectively connected to the common terminal of the three groups of series inductors. The system and the method carry out SOC (state of charge) monitoring on the battery of the lithium battery system, adopts a current feedback type compensation method to compensate a dead zone, and adopts an SVPWM (space vector pulse width modulation) technology to control the converter. The maximal value of the fundamental wave of the voltage of the output wire of the converter is the voltage of the direct-current side, and is higher than an output voltage of common SPWM converters by 15%.

The invention discloses a power equipment fault probability prediction method considering insulation defect categories and fault relevance. The method comprises the following steps: (1) collecting PRPS map data of power equipment and preprocessing the PRPS map data; (2) extracting partial discharge characteristics based on the pre-processed PRPS atlas data; (3) inputting the partial discharge characteristics into a trained convolutional neural network, and outputting a probability value P (Dk) that the power equipment has a certain type of insulation defects through the trained convolutional neural network; inputting the partial discharge characteristics into a trained long-short-term memory neural network, and enabling the trained long-short-term memory neural network to output the faultprobability P (F | Dk) of the power equipment under the condition of Dk; and (4) obtaining the final fault probability P (F) of the power equipment based on the following formula. In addition, the invention also discloses a power equipment fault probability prediction system.

The invention discloses a rigid rotor system for a helicopter. The rigid rotor system comprises a rigid rotor propeller hub, a rigid rotor pitch control mechanism and rigid rotor paddles, wherein the rigid rotor pitch control mechanism and the rigid rotor paddles are glued integrally and are connected with the rigid rotor propeller hub by virtue of bolts. According to the system disclosed by the invention, deep groove ball bearings and thrust bearings in the conventional teeterboard type propeller hub structure are replaced by joint bearings, so that a series of complex structures such as pitch change shafts, flapping hinges and vertical hinges are removed, and the problems such as complexity of the conventional teeterboard type propeller hub structure, heavy weight and short service life can be solved. Meanwhile, the problems that retreating paddleseasily enter an aerodynamic stalling state so as to reduce the aerodynamic efficiency due to swinging during high-speed forward flight and the like are solved, and the rigid rotor system has the advantages of simple structure, light weight, long service life, high maintainability and the like.

The invention provides a method and a device for processing SCSI (small computer system interface) sensing data, and is applicable to a storage system consisting of an SCSI drive unit and a hard disk device. The method comprises the following steps: the SCSI drive unit confirms that the hard disk device is in an abnormal state after receiving a command response including sensing data sent from the hard disk device, and carries out the following abnormity recovery process: cutting off the power supply to the hard disc device through sending a power-off instruction, and starting up a timer; and a power-on instruction is sent to recover the power supply to the hard disk after the timer returns the zero. The invention can effectively improve the fault-tolerance of the system.

The invention discloses a tube ice making machine applicable to both fresh water and seawater, comprising an ice making cylinder and a refrigeration system cooling the ice making cylinder and allowing a refrigerant to flow, wherein the ice making cylinder is successively provided with, from top to bottom, a water dividing tank, a flooded evaporator and an ice discharging mechanism, the flooded evaporator is provided with a refrigerant outlet and a refrigerant inlet respectively allowing the refrigerant to exit and enter, a liquid outlet allowing the gasified refrigerant to be discharged and a heating medium inlet allowing a heating medium to enter, the water dividing tank is communicated with an external water source, the ice making cylinder is provided with a plurality of ice making pipes which penetrate the flooded evaporator and enable the water dividing tank to be communicated with the ice discharging mechanism, and the tops of the ice making pipes are provided with water distributors. Thus, prepared tube ice is more applicable to refrigeration and preservation; the problem that an ice cutter cannot work because the ice cutter is bonded by ice layers is overcome, space for the ice cutter is saved, more ice making pipes can be arranged, and more tube ice can be prepared in a same period of time. The tube ice making machine is applicable to ice making.

The invention provides an automatic sorting system for waste of a blanking workshop and a sorting control method. The automatic sorting system for the waste of the blanking workshop is mainly composed of a material device, a conveying device, a sensing detection device, an execution device and a control device. According to the sorting control method of the automatic sorting system, a PLC, an HMI touch screen and a control panel are adopted to jointly constitute a control device for the automatic sorting system, and the control device comprises local control and remote control and comprises a manual operation mode and an automatic operation mode so that the integrated automatic sorting and control system for the waste of the blanking workshop is formed and can be used for automatically sorting and controlling the waste of the blanking workshop.

The embodiment of the invention provides a live broadcast page refreshing method and device, and relates to the technical field of the internet. The defect that in the prior art, the live broadcast status of a live broadcast page only can be changed by manually refreshing is solved. The method comprises following steps of obtaining current status information of the live broadcast page; determining whether the live broadcast page is a finished status or not according to the current status information; initiating an obtaining request to a server if it is determined that the live broadcast page is not in the finished status, wherein the obtaining request is used for obtaining the actual status information of the live broadcast page; judging whether the actual status information is consistent with the current status information or not; and refreshing the live broadcast page according to the actual status information if the actual status information is not consistent with the current status information. According to the embodiment of the method and the device, the live broadcast status of the live broadcast page can be automatically refreshed.

The embodiment of the invention provides an intelligent comprehensive inspection server, a terminal and a system, and belongs to the technical field of power systems. The intelligent comprehensive inspection server comprises a task making module and a task issuing module. The task making module is used for obtaining a pre-made inspection plan and generating an inspection task according to the inspection plan after the inspection plan is confirmed to be passed. The task issuing module is used for issuing the inspection task to the intelligent comprehensive inspection terminal. According to theintelligent comprehensive inspection server provided by the embodiment of the invention, the defects of missing inspection, missed recording, rerecording, untimely inspection and the like in a manualinspection mode can be avoided. In addition, the defects that manual inspection management is high in cost and the working state of inspection personnel cannot be supervised can be overcome. Meanwhile, inspection data can be uploaded to an information management system, so that management personnel can conveniently manage the daily working process and equipment inspection maintenance of the hydropower station, and the problems of large workload, low efficiency and the like of the existing power station equipment inspection management can be solved.

The invention discloses a composite modified asphalt bridge deck waterproof bonding layer. The composite modified asphalt bridge deck waterproof bonding layer comprising a bonding lower layer, a bonding upper layer and a waterproof layer is characterized in that the bonding upper layer and lower layer are paved from epoxy modified asphalt of 0.4 kilogram per square metre; the waterproof layer is paved from thermoplastic elastomer modified asphalt of 0.6 kilogram per square meter; the epoxy modified asphalt is prepared, in proportion, from matrix asphalt, epoxy resin, curing agents, vulcanizingagents, curing accelerator, styrene butadiene rubber and talc; the thermoplastic elastomer modified asphalt is prepared, in proportion, from matrix asphalt, epoxidized natural rubber, thermoplastic elastomer, polyphenylene ether, and fiber. The composite modified asphalt bridge deck waterproof bonding layer has the advantages of making full use different characteristics of each material to enablethe waterproof bonding layer to have excellent bonding and waterproof properties, guaranteeing the epoxy modified asphalt to be in full bonding with a concrete bridge deck and an asphalt mixture surface layer, and avoiding various problems such as avoids problems such as waterproof layer breakage and flexural fatigue caused by base layer cracking stress transmitted to the waterproof layer, and premature aging under high stress by the thermoplastic elastomer modified asphalt.

The invention provides a perpendicular shaft wind turbine with an adjustable windward area. The perpendicular shaft wind turbine comprises a main shaft and blades and further comprises a scissor fork type mechanism, sliding rails, a rope wheel, a servo taking-up and paying-off motor and ropes, the servo taking-up and paying-off motor is coaxially installed at the top of the main shaft, the scissor fork type mechanism is installed on the main shaft, the rope wheel is fixedly connected with an output shaft of the servo taking-up and paying-off motor, one end of each rope is fixed to the rope wheel, and the two ropes are the same in winding direction. The other ends of the ropes are fixedly connected with blade rotary shafts, one end or the middle of each blade is fixedly connected with the rotation center of the scissor fork type mechanism, the other ends of the blades are matched with the sliding rails, and the blades can move along the sliding rails but can not rotate around the rotary shafts of the blades. The wind turbine is installed by the adoption of a blade fixed pitch, and the radius of a wind wheel is controlled according to wind speeds, so that the pneumatic performance of the perpendicular shaft wind turbine is improved at different wind speeds. Meanwhile, the mechanics properties of the perpendicular shaft wind turbine are improved in a strong wind environment, even braking and shutdown stages can be avoided, and the working range of the wind turbine is greatly enlarged.

The invention discloses a press-fitting device for a roller pin check ring for a tripod ball. The press-fitting device mainly comprises a pressing-in device, a check ring compression device and the like; a driving device is installed above a frame top plate of a frame; the lower end of the driving device is connected with and drives the pressing-in device to do vertical reciprocating motion alongthe axis thereof; one end of a transition shaft of the pressing-in device is connected with a piston rod of the driving device, and the other end of the transition shaft is connected with a pressing head; the pressing head is sleeved with a pressing sleeve; a guide column and the transition shaft are connected by an anti-rotation plate so as to limit the pressing-in device to only move in the axial direction; a fixed substrate is fixed onto a frame base; the check ring compression device is placed on the fixed substrate; and the check ring is placed in the check ring compression device. The press-fitting device avoids the bad conditions that the check ring seriously deforms, a port is overlapped and the like when the check ring is entirely pressed down, reduces the risk of plastic deformation of the check ring, effectively protects the assembly mating state of the check ring and an outer ring, can well protect the check ring and the press-fitting device, reduces the labor intensity andcost of a worker, and improves the automation degree and production efficiency.

The invention provides a reinforced concrete stairway anti-seismic reinforcing structure and a transforming method thereof. Stairway plates are fixed between an upper platform base and a lower platform base, the connecting positions of the lower platform base and the stairway plates are arranged in a horizontally cut-off mode, and two lower grooves are formed in the cut-off face of the lower platform base in the width direction of the cut-off face of the lower platform base. Two upper grooves are formed in the cut-off face of each stairway plate in the width direction of the cut-off face of the stairway plate, a lead core rubber support is mounted between each upper groove and the corresponding lower groove, and FRP is pasted to the bottom of the stairway plates for reinforcement. The structure is definite and reasonable in force transmission mechanism, and the stairway plates and the lower platform base are flexibly connected through the lead core rubber support to reduce the effect of an earthquake.

The invention discloses a method and a device for realizing subscriber state synchronization in an IP multimedia subsystem (IMS) domain. The method comprises the following steps that: when a subscriber does not hook on, a media gateway controller transmits an unconditional report detection on-hook event signalling to a media gateway timingly; after receiving the unconditional report detection on-hook event signalling and detecting that the subscriber is in an on-hook state, the media gateway reports an on-hook event informing signalling to the media gateway controller; and after receiving the on-hook event informing signalling, the media gateway controller judges whether to release the relevant control resources of the subscriber or not. Due to the adoption of the technical scheme, even if the on-hook informing event reported by the media gateway is lost, one side of the media gateway controller can release the relevant control resources of the subscriber in time, and the condition that the subscriber state mastered by one side of the media gateway controller is not consistent with the actual subscriber state, which is caused by the unusual condition that on-hook informing event reported by the media gateway is lost, can be avoided.

The invention provides an indoor unit of a cabinet air conditioner. The indoor unit comprises a machine shell, a draught fan, a heat exchanger and an air duct assembly, wherein an air inlet and an air outlet are formed in the machine shell; the draught fan is arranged in the machine shell and located on the inner side of the air inlet, and air which enters the machine shell from the air inlet is urged to be accelerated to flow towards the air outlet; the heat exchanger is arranged in the machine shell and located at a flowing path from the draught fan to the air outlet, and heat exchanging is conducted on the air flowing through the heat exchanger; the air duct assembly is arranged in the machine shell; the air duct assembly is assembled to guide the part of air blown out of the draught fan to the heat exchanger, heat exchanging is conducted on the air and the heat exchanger to form temperature-changed heat exchanging air flow, and the heat exchanging air flow is guided to pass through a first air outlet position of the air outlet and flow out of the machine shell; the other part of air blown out of the draught fan is isolated from the heat exchanger to form isolated air flow which does not conduct heat exchanging with the heat exchanger, and the isolated air flow is guided to pass through a second air outlet position located on the circumferential side of the first air outlet and flow out of the machine shell; and the first air outlet position is separated from the machine shell through the second air outlet position.

The invention discloses a castor for furniture bottoms and relates to the field of furniture fittings. The castor comprises a connecting base, a support frame and a roller, the support frame is rotationally connected to the bottom of the connecting base through a first rotating shaft arranged along the vertical direction, the roller is connected to the support frame rotationally through a second rotating shaft arranged along the horizontal direction, a support seat is arranged on the support frame with the length in the vertical direction, a telescopic structure is arranged in the roller and comprises a connection layer, a cover layer and a plurality of telescopic rods, the telescopic rods connected with the connection layer and the cover layer can extend and retract radially, the connection layer is fixedly connected with the second rotating shaft, permanent magnets are arranged on one side, close to the telescopic rods, of the cover layer peripherally, electromagnets in mutual repulsion with the permanent magnets after being energized are arranged on one side, close to the telescopic rods, of the connection layer peripherally, and the cover layer is made of wearproof stretchable TPU material. Through the technical scheme, the problem that the support seat can only be moved with force larger than gravity of furniture when the support seat and the roller are switched is solved.

The invention discloses a temperature and humidity automatic balance control method and system in water curtain cooling. According to the current indoor temperature and humidity, a preset standard temperature and a preset standard humidity are compared to control the wet water area including but not limited to a water curtain and thus the current temperature and humidity are stabilized within thestandard temperature and standard humidity range, so that the comfortable environment of the livestock and poultry house is guaranteed, and the dramatically-temperature-changing cooling and/or high-temperature and high-humidity state is avoided. The method comprises the following steps that a standard temperature is set to be P0, a standard humidity is set to be S0, and a maximum difference valueis allowed to be between an allowable temperature and a standard temperature is P1; if the current temperature is larger than P0, a water curtain is started, the wet water area M1 is gradually increased according to the temperature rise, and the indoor temperature and humidity are detected in real time; the wet water area of the water curtain is controlled according to the indoor temperature variable quantity and the indoor humidity variable quantity after the water curtain is started, so that the current humidity is not higher than the standard humidity S0, and the current temperature is nothigher than P0+P1. The system comprises a controller for executing the method, a temperature sensor and a humidity sensor, the temperature sensor and the humidity sensor are connected with the controller, and the controller is provided with a control side connected with a fan, a dehumidifier and a water curtain.

The invention discloses a pressuring, catalyzing and purifying treatment device for efficient combustion waste gas heat energy recycling. The pressuring, catalyzing and purifying treatment device forefficient combustion waste gas heat energy recycling comprises a cooling tank, a gas exhaust pipe and a base plate. The upper surface of the cooling tank is connected with a gas intake pipe in a penetrated manner. The cooling tank is connected with a compression adsorption tank through a connection pipe. The gas exhaust pipe is connected to the side face of the compression adsorption tank in a penetrated manner. A preheating pipe is fixedly installed on the outer portion of the right side of the heating tank. The outer side face of the compression adsorption tank is connected with the heatingtank through a flow distributing pipe. The outer portion of the right side of the compression adsorption tank is rotationally connected with a lead screw. The inner portion of the side face of the connection pipe is movably connected with a seal plate. A fixing rod is welded to the middle of the inner portion of the connection pipe. The pressuring, catalyzing and purifying treatment device for efficient combustion waste gas heat energy recycling adopts a novel structural design, so that the pressuring, catalyzing and purifying treatment device can recycle and utilize heat energy in waste gas during machining; and the pressuring, catalyzing and purifying treatment device is internally provided with the flow distributing treatment structure, so that the waste gas treatment effect is improved.

A method of operating a display and control device coupled to at least two spinning preparation machines is disclosed. The method includes a step of displaying machine display sections on display sections of the device in a non-highlighted state, wherein each of the machine display sections represents one spinning preparation machine coupled to the display and control device. In addition, the machine display sections can be selected by virtue of operating sections of the device. Then, the method includes a step of displaying the machine display section of the selected spinning preparation machine in a first highlighted state different from the non-highlighted state and displaying the machine display section of the machine not selected in the non-highlighted state; displaying a first motion selection section; displaying a first motion display section when the first motion is selected by virtue of the operating sections; displaying a second motion selection section; and displaying a second motion display section when the second motion is selected.

The invention relates to a load sensitive technology, and discloses a load sensitive system which comprises a pumping device connected with an engine and a downstream compensation load sensitive multi-way valve, and the pumping device is connected with a plurality of executing mechanisms through the downstream compensation load-sensitive multi-way valve; a maximum load pressure feedback port of the pumping device is connected to the downstream compensation load sensitive multi-way valve so as to control the flow of the pumping device according to the maximum load pressure fed back by the downstream compensation load sensitive multi-way valve; and the load sensitive system further comprises a control unit used for controlling the output pressure of a plurality of pressure control devices, and the pressure control devices are connected with the executing mechanisms in a one-to-one correspondence mode through the downstream compensation load sensitive multi-way valve so as to control the flow of hydraulic oil flowing into the executing mechanisms. The invention further discloses an engineering hoisting machine. According to the load sensitive system and the engineering hoisting machine, all the executing mechanisms can be well made to move in a coordinated mode, and good flow distribution performance is achieved.

The invention discloses a method for calculating the blocking degree of pipelines and filters. The method comprises the following steps of measuring the full pressure (P) and the static pressure (Pst)of a certain position of a pipeline through a pressure measuring pipeline, and obtaining the dynamic pressure Pd through calculation, wherein the dynamic pressure Pd = P-Pst; and representing the blocking state of the system flow by the ratio of the static pressure to the dynamic pressure (Pst / Pd) of the flow system, and representing the blocking degree (C) of the system flow by the ratio of the increase amount (Pst/Pd-L) of the blocking state to the range of the specified initial blocking state parameter (L) and the final blocking state parameter (H), and please see the specification for the expression. The method can accurately and stably indicate the blocking degree of the pipelines and the filters in the variable flow system by using the blocking degree derived from the fluid mechanics theory and the algorithm, and avoids the problem that the blocking state of the pipelines and the filters cannot be determined due to changes in the flow rate and the pressure.