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271results about How to "Strong reliability" patented technology

Carbon dioxide phase change coal seam fracturing device and utilization method

The invention relates to a carbon dioxide phase change coal seam fracturing device and a utilization method. A barrel is in threaded connection with a valve. The carbon dioxide phase change coal seam fracturing device is characterized in that the two ends of the barrel are in threaded connection with connectors with explosion venting holes, the connectors are provided with cable passing holes, and cable grooves for containing a cable are formed in one sides of the barrel and the two connectors. Due to the fact that the cable is placed in the cable grooves, or one pole of the cable is placed in the barrel, and the barrel is placed on the other pole of the cable, or the whole cable is placed in the barrel, and meanwhile the utilization method is provided, when conveyed into a coal seam drilled hole, the carbon dioxide phase change coal seam fracturing device can be rotated or directly pushed into the drilled hole through a drilling machine, and the situation that the cable is broken during external connecting is avoided; no other special equipment is needed, the depth of the part conveyed in the drilled hole is not limited, and high work efficiency and reliability are achieved; and a screw structure is adopted and directly screwed in a coal body, drilling links are reduced, the screw structure is beneficial to powder discharge and meanwhile is closely embedded with the coal body, gas acting force is improved, the fly stop problem is thoroughly solved, and high reliability is achieved.
Owner:CCTEG SHENYANG RES INST

Method for monitoring driving state of based on vehicle road cooperation technology

ActiveCN108615364AStrong reliabilityGuaranteed real-time and reliabilityParticular environment based servicesDetection of traffic movementEngineeringSatellite positioning
The invention discloses a method for monitoring a driving state of a vehicle based on a vehicle road cooperation technology, which is realized by an LTE-V technology based on roadside units provided on road sides and an onboard unit provided on a vehicle. Multiple groups of roadside units are arranged along the road, and the two groups of roadside units can communicate with each other; the communication ranges of adjacent two groups of roadside units have an overlapped range; and each group of roadside units communicate with the onboard unit in real time through the LTE-V technology. When thevehicle enters the roadside unit monitoring range, the roadside units communicate with the onboard unit in real time, the vehicle position information at different times is calculated, the velocity acceleration information at different times is acquired after calculation, thereby forming vehicle driving state information including the vehicle position, the speed, the acceleration, the time, a driving trajectory. The invention has the advantages that in the process of monitoring the vehicle driving state information, the method can completely avoid the satellite positioning system, and is basedon the vehicle road cooperation technology, and the real-time and reliability are stronger.
Owner:RES INST OF HIGHWAY MINIST OF TRANSPORT

Micro-earthquake positioning method and device

The embodiment of the invention provides a micro-earthquake positioning method and device. The method comprises the steps of constructing an initial velocity model representing formation velocity, utilizing the initial velocity model for positioning, and obtaining the initial position of a micro-earthquake event; according to the three-dimensional distribution of the initial position of the micro-earthquake event, calculating the enveloping surface of the micro-earthquake event, wherein space inside the enveloping surface is a fracture belt; obtaining the velocity equivalent of the fracture belt, wherein the velocity equivalent of the fracture belt can represent real-time changes of the formation velocity in the fracture process; according to the velocity equivalent of the fracture belt, and the spatial distribution of the fracture belt, updating the initial velocity model, and obtaining the updated velocity model; utilizing the updated velocity model for positioning, and obtaining the position of the micro-earthquake event. According to the micro-earthquake positioning method and device, the updated velocity model takes the factor of the real-time changes of the formation velocity in the fracture process into consideration, and the result of positioning through the updated velocity model is higher in accuracy and reliability.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1

Method for autonomously monitoring integrity of monitoring stations of global navigation satellite system augmentation system

The invention discloses a method for autonomously monitoring the integrity of monitoring stations of a global navigation satellite system augmentation system, which comprises the following steps: receiving a satellite ephemeris and initial satellite data respectively by using each monitoring station of the GNSS augmentation system; transmitting the initial satellite data of each monitoring station to a master control station through a communication network; constructing a single-satellite multi-monitoring-station error equation by using the master control station according to the precise satellite ephemeris and the initial satellite data of each monitoring station; calculating a weight matrix according to different elevating angles of each monitoring station relative to satellites; establishing multi-satellite multi-monitoring-station errors and the weight matrix thereof; constructing a normal equation according to the error equation and the satellite weight matrix and resolving the normal equation according to a least square method; and performing gross error test and gross error identification according to corresponding residual errors so as to realize the autonomous integrity monitoring of the monitoring stations. Through the method, the monitoring stations which may have the errors can be eliminated and the reliability of the whole GNSS augmentation system is improved.
Owner:CHINESE ACAD OF SURVEYING & MAPPING

Pneumatic actuator

The invention relates to a pneumatic actuator. The pneumatic actuator comprises a cylinder block, an actuating box body and a spring cylinder block which are connected with one another, wherein the cylinder block is provided with an air inlet and an air outlet; a piston in the cylinder block is connected with a spring seat in the spring cylinder block through a piston rod which passes through the actuating box body; a return spring is arranged outside the spring seat; the entire piston rod is formed in the middle through butt joint of an actuating block; a rolling shaft is inserted into the actuating block; a roller is sleeved outside the end part of the rolling shaft and matched with a fixed shift fork on an output shaft in the actuating box body; a guide rod which is parallel with the piston rod is arranged in the actuating box body; and the actuating block is provided with a guide hole and is in clearance fit with the guide rod through the guide hole. The defects of easy deformation of the piston rod and the piston and air leakage of the cylinder caused by an ordinary pneumatic actuator in a working process in the prior art are overcome. Due to specific design, the actuating block is matched with the guide rod through the guide hole and linear and stable running is kept. The pneumatic actuator has the advantages of compact structure, high reliability and long service life.
Owner:季忠庸

High-voltage DC transmission line lightning interference recognition method based on S transform

The invention relates to a high-voltage DC transmission line lightning interference recognition method based on S transform. The method is technically characterized by comprising the following steps:1, voltage at a protection element connected with each pole of the DC transmission line is acquired in real time at a system rectifier side protection and mounting place; 2, after the voltage acquiredin the first step at the protection element is filtered, a voltage fault component 5 ms after fault is extracted, and line mode voltage is obtained through calculation; and 3, S transform is carriedout on the line mode voltage at the system protection and mounting place to obtain a complex-time frequency S matrix, the S transform transient energy and the GL under a frequency band below 100Hz andthe S transform transient energy and the GH under a frequency band above 200Hz are solved, the ratio k of the two is calculated, the k value and a lightning interference recognition criterion are compared, and whether the intraregional interference is lightning interference or intraregional fault can be recognized accurately. The lightning interference can be recognized accurately, the reliability is strong, the action speed is quick, the recognition is accurate, and engineering realization is easy.
Owner:STATE GRID TIANJIN ELECTRIC POWER +1

Intelligent front-end system for transmission line on-line detection system

The invention discloses an intelligent front-end system for a transmission line on-line detection system. The intelligent front-end system comprises an intelligent sensor terminal and an intelligent gateway, wherein the intelligent sensor terminal comprises a danger level grading module, a data acquisition and transmission period real-time regulating module used for regulating according to a result evaluated by the danger level grading module, and an alarm module; the intelligent gateway comprises a data acquisition module used for receiving detection data sent by a sensor arranged on a transmission line, and a danger level estimation module used for calculating a grading threshold value of data according to a data danger level evaluation mathematical model to obtain a danger level grading threshold value and sending a command of setting a threshold value to a corresponding sensor terminal, and an alarm module used for sending an alarm signal when the data danger level is high; results of the data danger level evaluation model are in a threshold value setting mode; and danger levels are high, intermediate and low danger levels. The intelligent front-end system has the advantages of good timeliness, high reliability, low use cost and convenience for maintenance.
Owner:ENJOYOR COMPANY LIMITED

Water stress control irrigation system and data calibration method of water stress control irrigation system

The invention relates to agricultural intelligent equipment technology, in particular to a water stress control irrigation system and a data calibration method of the water stress control irrigation system. The water stress control irrigation system is used to provide water to a cultivation device. The cultivation device includes a head device and an irrigation device. The head device includes a data acquisition unit, a stress irrigation control unit and a water supply control unit. The data acquisition unit is used to collect water content and total irrigation water of the cultivation device. The stress irrigation control unit is used to calculate needed irrigation volume in accordance with data information collected by the data acquisition unit and upper limit value and lower limit value of default irrigation amount. The water supply control unit is used to control irrigation time and irrigation amount of irrigation device, according to the needed irrigation volume. The data acquisition unit can constantly monitor the water content of the cultivation device and is with data calibration algorithm to get optimal irrigation amount. The data calibration method of the water stress control irrigation system is accurate. The water stress control irrigation system changes single measurement mode and meets the need of water stress experiments of different gradients.
Owner:BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI
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