82results about How to "Judgment stability" patented technology

The invention discloses a tunnel face stability calculation method taking seepage force into consideration. The method mainly comprises the following steps of (1) according to parameters such as a tunnel burial depth, an excavation size and the like, determining a geometric relation among the tunnel burial depth, the excavation size and a damage range; (2) according to a seepage balance equation and in combination with numerical simulation software, obtaining average seepage force in the damage range; (3) according to an energy conservation principle, obtaining a virtual support force expression of a tunnel face; and (4) reducing surrounding rock parameters in combination with a strength reduction method, so that virtual support force is zero, and a reduction coefficient at the moment is atunnel face stability coefficient. The method disclosed by the invention can be applied to the tunnel face stability analysis of underground building structures such as mining roadways, hydraulic tunnels, metros and the like during consideration of the action of the seepage force under the water level, and a reference is provided for support reinforcement of the tunnel face.

A robot's foot with the shape similar to that of human foot is composed of rubber sole plate under foot plate, foot plate, switch plate, six-component sensor, rubber ring between said foot plate and lower flange, lower flange between foot plate and six-component sensor, upper flange between six-component sensor and switch plate and connected to malleolus joint of robot, and signal processing circuit integrated in said six-component sensor.

The invention relates to a refrigerator energy-saving control method which comprises the steps that at a step 11, an accumulated period Ta of continuity and stabilization of a refrigerator compartment temperature is calculated and/or a continuous accumulated period Td of door closing is calculated; at a step 12, whether Ta is bigger than or equal to a preset stable period TB is judged, a step S13 will be executed if Ta is bigger than or equal to the preset stable period, and otherwise the step 11 will be restarted to continue the calculation at the step Ta and/or whether Td is bigger than or equal to a preset door closing period TE is judged, a step S13 will be executed if Td is bigger than or equal to the preset door closing period, and otherwise the step 11 will be restarted to calculate Td; and at a step 13, an energy-saving mode of a refrigerator is started. The energy-saving mode is started by judging stability of the refrigerator compartment temperature and a door opening state of the refrigerator. A user will be deemed to have not used the refrigerator for a period (such as at night, during working and in a vacation) when a door is closed for a certain period/or fluctuations of the compartment temperature are kept within a certain scope, the refrigerator will enter the energy-saving mode and energy consumption of the refrigerator will be reduced.

The invention discloses a method for preparing nanometer ATO dispersing slurry fast, efficiently and cheaply. The method comprises the following steps: (1) successively adding silane coupling agent and ATO powder in water under stirring according to a weight ratio of to 0.005-0.02:1 to obtain ATO powder suspending liquid with the solid content of 16-55%, adjusting the pH value with alkaline solution to 9-11; (2) placing the ATO powder suspending liquid obtained by the step (1) in a ball mill to perform ball milling for 0.5-7.5 hours which adopts zirconium beads as ball-milling beads, removing the ball-milling beads to obtain slurry, fast adjusting the pH value with alkaline solution to 6-8; and (3) centrifuging the slurry obtained by the step (2) in a centrifugal machine under the rotate speed of 1000-4000rpm to obtain the nanometer ATO dispersing slurry. The preparation method of the invention is characterized by fast speed, electricity-saving and high efficiency; the average diameter of the particles of the prepared slurry is 25-50nm, the solid content is 15-50%, and the dispersing effect is very good.

The invention provides a method for predicting the stability of vehicles, and belongs to the field of automotive technologies, and the method can be used for solving the problem that in the prior art, methods for predicting the stability of vehicles are not high in accuracy and low in reliability. The method comprises the following steps: S10, detecting an acting force Fi exerted on each wheel of a target vehicle by the ground; S20, analyzing and calculating a force-center coordinate vector as shown in the specification of the target vehicle; and S30, substituting the force-center coordinate vector as shown in the specification into a vehicle force-center/stability transfer function which is as shown in the specification and is pre-stored in a vehicle-mounted controller of the target vehicle so as to calculate a stability signal Scar of the target vehicle, and according to the value of the stability signal Scar, judging the current stability state of the target vehicle; a test vehicle and the target vehicle are same in type or similar in technical parameter, the test vehicle is defined as a vehicle for calibrating test data under experimental conditions, and the target vehicle is defined as a vehicle normally running on the road. The judging process in the method is simple and convenient, and the method is accurate in judgment and high in reliability.

The invention relates to an error debugging method for an electronic electric energy meter, and belongs to the technical field of electric energy meter debugging. The error debugging method comprises the steps of firstly judging the accuracy and the stability of a standard meter in output; continuously reading power effective values of the standard meter and power effective values of an electric energy meter to be tested if the standard meter conforms to requirements; respectively calculating an average power effective value of the standard meter and an average power effective value of the electric energy meter to be tested according to the read power effective values of the standard meter and the read power effective values of the electric energy meter to be tested; and finally calculating an error of the electric energy meter to be tested according to the acquired average power effective value of the standard meter and the acquired average power effective value of the electric energy meter to be tested, and carrying out debugging on the electric energy meter to be tested according to the error. According to the invention, the error of the electric energy meter is calculated through a mode of the power effective values, the error calculation time of the electric energy meter is shortened, and the error debugging efficiency is improved. Meanwhile, the invention can also judge the accuracy and the stability of a debugging and detecting platform in output, thereby avoiding a quality problem caused by problems of the debugging and detecting platform.

The invention discloses a rapid and accurate monitoring system for the deformation of surrounding rock of an underground roadway and a monitoring method of the system. The system comprises a rubber belt, code reference points, non-code reference points, a fixed scale, cameras and a computer; each non-code reference point is composed of a non-code center point, and each code reference point consists of a code center point and annular codes. The monitoring method of the system comprises the steps that S1, the rubber belt is fixed on the section of the roadway, wherein the shape of the rubber belt is identical to that of the section of the roadway; S2, the code reference points and the non-code reference points are inserted in the rubber belt at intervals, and the fixed scale is hung betweentwo code points; S3, the cameras are connected with the computer, and camera lens are aligned with the rubber belt; S4, an automatic photographing mode is adopted for recording the movement process ofthe code reference points and the non-code reference points; S5, collection is completed, and photo information is transmitted to the computer; S6, system measurement software calculates the three-dimensional coordinate changes of the code reference points and the non-code reference points; S7, the deformation of the surrounding rock of the entire roadway is analyzed.

The invention relates to an automatic single particle irradiation test control system and method. The system comprises an experimental instrument program control module, a fluence rate monitoring module, an error number counting module and a timing detection module. According to the invention, the automatic opening and closing of the chip irradiation test are realized by presetting an irradiationcondition threshold value, the automation degree of the integrated circuit single particle irradiation test is effectively improved, and the waste of a single particle irradiation tester and the workload of an experimenter are reduced; and meanwhile, the generated data file contains all test data (particle fluence rate, total particle fluence, test current, single particle error number and test waveform), so that the single particle test accuracy is improved, and is beneficial to the subsequent personnel to analyze the test result.

The invention relates to a fault positioning system and method based on video image diagnosis data, and the system comprises a front-end equipment camera system which comprises a full-path camera and is configured to shoot video image information; a comprehensive video monitoring system which is configured to check the real-time video and the recorded video shot by the front-end equipment camera system; and a video operation and maintenance system which is configured to perform quality diagnosis on the video images acquired by the comprehensive video monitoring system to determine video monitoring fault types and position fault causes. The method can be used for centralized management and operation and maintenance of video service related equipment and systems, provides intelligent service of fault positioning analysis for users, assists operation and maintenance management personnel in judging the safety and stability of video operation, and provides powerful support for production operation and maintenance decision making.

The invention discloses a high-temperature sedimentation stability test device for cement paste. The high-temperature sedimentation stability test device mainly comprises a base support 25, a maintenance kettle 7, a paste cylinder 6, an upper pressure sensor 21, a lower pressure sensor 20, a temperature sensor 11, a control panel 8, a computer 9, a gas source 1 and a water source 2, wherein the paste cylinder is placed in the maintenance kettle; heaters 15 are arranged between the paste cylinder and the maintenance kettle; an outer magnet 23 driven by a belt pulley 22 is arranged in the kettle body; the temperature sensor is inserted into the maintenance kettle and connected with the control panel and the computer; an inner magnetic rod 12 of a driver at the upper part of the paste cylinder is connected with a mandrel 13; the outer magnet of the maintenance kettle drives the inner magnetic rod in the paste cylinder to rotate to drive a paddle 16 to stir cement paste in the paste cylinder; the paste cylinder is provided with the upper pressure sensor and the lower pressure sensor which are both connected with the control panel and the computer; a driver plug 10 is connected with the gas source through a pressure regulating valve 3; the maintenance kettle is connected with a water source. The high-temperature sedimentation stability test device is reliable in principle, reasonable in structure and simple and quick in test, and can measure the sedimentation stability of different cement paste systems in different high-temperature environments.

The invention discloses a grid-connected system short circuit ratio measurement method and device based on fundamental wave impedance identification. The grid-connected system short-circuit ratio measuring device based on fundamental wave impedance identification comprises a master grid-connected inverter, a short-circuit ratio calculating unit, a slave grid-connected inverter and a weak power grid. Specific operation process of the experimental device for measuring the short circuit ratio of the grid-connected system is as follows: the disturbance injection unit injects disturbance signals into the grid-connected inverter, current response signals and voltage response signals of a common coupling point PCC are collected through the grid-connected current sensor Hig and the grid-connectedvoltage sensor Hug respectively, fundamental wave impedance is obtained through the fundamental wave impedance identification unit, and then the short-circuit ratio of the system is obtained through calculation. The experimental device can accurately and reliably calculate the short circuit ratio of the grid-connected system, so that the experimental device is applied to stability judgment and self-adaptive control of the grid-connected system, and the stability of the grid-connected system is improved.

The invention relates to a generator set power output stability detection system based on power detection. The system comprises a prime mover detection module, a generator detection module, a virtualload module, a central control module and a display module. The virtual load module is used for testing the generator set; the load module is controlled by the central control module to select small interference variation of different magnitudes in sequence to cause small interference of different degrees to the running generator set in sequence. And the static stability of the generator set is quickly and visually judged according to the time length required for recovering the stability of the generator set after the generator set is interfered, so that the judgment efficiency of the generator set power output stability detection system based on power detection is improved. Meanwhile, the system can effectively improve the universality of the detection result of the system by sequentiallyrecording the duration required for recovering the stability of the generator set under the condition of different magnitudes of load disturbance and counting the total duration.

The invention relates to a method for judging the reinforcement stability of a long pipe shed in a tunnel intrusion contact zone, and belongs to the field of tunnel foundation construction. The distance z from the ground of the intrusion contact zone to a tunnel vault, undrained shear strength cu of a soil body in the intrusion contact zone, thickness dz of the long pipe shed after grouting, diameter d1 of a steel pipe of the long pipe shed, wall thickness delta, shear strength cp of the long pipe shed, shear strength cc of a grouting body, average shear strength cc and p of the long pipe shedand the grouting body after weighted averaging according to area, shear capacity Kj of the long pipe shed, perimeter L of a cross section of the grouting body of the long pipe shed, length Ld1 of a shorter side of the long pipe shed embedded in a surrounding rock on the inner side of the intrusion contact zone, length Ld2 of a shorter side of the long pipe shed embedded in the surrounding rock onthe outer side of the intrusion contact zone, shear strength t1 between the grouting body of the long pipe shed and the surrounding rock on the inner side of the intrusion contact zone, shear strength t2 between the grouting body of the long pipe shed and the surrounding rock on the outer side of the intrusion contact zone, and reinforcement carrying capacity K of the long pipe shed are determined in sequence, and the reinforcement stability of the long pipe shed in the tunnel intrusion contact zone is judged to avoid slump of the intrusion contact zone.

The invention relates to a method for extracting and judging operation data stability of ship electromechanical equipment. The method comprises the following steps: acquiring ship electromechanical equipment data, preliminarily judging data stability, calculating the minimal length of a stable inspection data segment, judging data stability point by point, correcting the stability inspection result as well as storing and outputting results. The defects that true stable data is difficult to judge simply by the statistic method and large-range judgment error occurs in the prior art are overcome.Through the judgment method, the stable operation data of the electromechanical equipment is extracted, accuracy and reliability of modeling, evaluation and even optimized decision can be improved, and important significance in analysis and research of ship data is achieved.

The invention relates to an electromagnetic flow velocity flow rate measuring device based on real time attitudes and a measuring method thereof, and belongs to the hydrology data measuring technologyfield; the measuring device comprises a pressure sensor, an electromagnetic flow velocity meter, an attitude sensor, a CPU circuit, a control switch, a LoRa circuit, an antenna and a host computer; the electromagnetic flow velocity meter gathers real time single point current speed; the pressure sensor gathers real time air pressure, water pressure and water temperature data; the attitude sensorgathers real attitude data of an underwater lead fish; the CPU circuit stores real time attitude data, pressure data and flow velocity data, and sends the data to the host computer through the LoRa circuit and the antenna; the host computer parses and fuses to obtain three dimensional attitude angle data and water depth data, and the flow velocity data is combined, thus calculating to obtain the current flow rate data. The method and device employ the electromagnetic flow velocity meter to measure the flow velocity, select the flow velocity data under stable states according to real time altitudes, thus accurately measuring flow velocity and calculating current flow rate; the measuring method and device are suitable for various complex water area environments.

The invention provides an elevator safety and synchronous self-rescue device. The elevator safety and synchronous self-rescue device is characterized by comprising an elevator car synchronizer, a self-rescue device and a synchronous detecting device, wherein the elevator car synchronizer is connected with an elevator car through a rack on a lifting guide rail; the self-rescue device is connected with the elevator car synchronizer through a clutch; and one end of the synchronous detecting device is connected with the elevator car, and the other end is connected with a fixed part of the elevator car synchronizer. The synchronous operation of the elevator safety and synchronous self-rescue device and the elevator car is realized; the elevator car is accurately positioned; persons trapped in an elevator can realize self rescue through manually driving the elevator to a safety position or an exit under the condition of not damaging the elevator car on occasions of power failure, rupture of an elevator lifting rope or other elevator faults; and meanwhile, the operation stability of the lifting rope of the elevator car can be judged to a certain extent. The elevator safety and synchronous self-rescue device is high in efficiency and small in time consumption, saves the manpower, the material resources and the financial resources, timely rescues persons trapped in the elevator, and guarantees the safety of the trapped persons.