GPS technology has the characteristics of high precision, high sampling, real-time, and simultaneous determination of three-dimensional coordinates of points, which can not be compared with other monitoring technologies. It plays a very important role in deformation monitoring. Starting from the composition of GPS positioning system, this paper expounds the three components of GPS positioning system, as well as the association and coordination between each component of the work; then the GPS deformation monitoring mode and several error sources in the monitoring process are introduced. The advantages and disadvantages of GPS technique in deformation monitoring are analyzed and its application trend is predicted. GPS positioning technology is applied in all aspects of our life, creating a lot of social and economic value for us.
This paper focuses on integrating sensor network into traditional garden irrigation. Through different terminal sensors, soil temperature and humidity, trace elements, PH value and other parameters through the Internet of Things technology to achieve reliable information transmission, through the regional controller using LORA protocol, wireless unidirectional or bidirectional 485 communication, to achieve intelligent control.The resolution of soil temperature is 0.1℃and the accuracy is 0.5℃.The water resolution is up to 0.1%, the accuracy depends on the water content, but not more than 3%, high measurement accuracy, fast response. Sensor to obtain soil moisture, when the occurrence of diseases and insect pests, the system will feature extraction of the picture, identify the disease and insect information in the picture, in order to help users to solve problems. Through the complementation of APP, PC and terminal sensor network irrigation equipment, integrated services are created to realize the intelligent system management of sprinkler irrigation equipment. The system has been proved to have real time, practicability, memory and reliability.
The wave energy device is an energy conversion device that can utilize wave energy from marine renewable energy sources. In this paper, based on the float and oscillator motion model, the value of the damping coefficient is expanded to an optional interval. Secondly, according to the definition of power, the equations of the average output power and linear damping coefficient of the PTO system are derived, the optimization model is constructed, and the maximum output power and the corresponding linear damping coefficient are obtained by using the golden partition method and the genetic algorithm in the one-dimensional search algorithm to solve respectively. In this paper, two different algorithms are used according to the functional characteristics of the output power model of the PTO system in different cases, which reduce the amount of operations while ensuring a more accurate solution.
Abstract Space based information network system is a network system composed of spacecraft and spacecraft, which plays an immeasurable role in commercial and military, so it is very important to carry out simulation research on it. In this paper, the idea of Multi-Agent modeling is applied to study the simulation modeling of space-based network information system. This paper first introduces the space-based network information architecture, Multi-Agent system and RepastHPC, a Multi-Agent high-performance computing simulation toolbox. The simulation example is Starlink’s information support capability under AIM-260 “A aims and directs B to strike” fire attack mode, and the process of message Starlink transmission is mainly studied. In this paper, the space-based network information system is abstracted into route agent and sat agent, the decision-making method is given for each behavior, and a feasible Multi-Agent system is established. The simulation experiment of information transmission is carried out on RepastHPC platform, and the feasibility of applying Multi-Agent system to space-based network information system is verified.
Abstract In order to change the traditional gas concentration inspection and exhaust device, the system through the gas concentration to control the rotation of the fan, to achieve real-time gas concentration monitoring, alarm control and GPS global positioning. In this study, STM32F4ZGT6 with ARM Coretex-M4 as the core controller is combined with embedded system design, and MDK is used to develop software programming. Through the ADC MQ-9 carbon monoxide sensor detection module and infrared NDIR carbon dioxide sensor detection module of the output of the analog conversion to digital quantity acquisition and processing, when the gas concentration exceeds the pre-set threshold, triggering a buzzer alarm, timer and the energy conservation and exhaust fan work, implementation is beyond the rapid circulation of the gas and gas concentration inside and outside the display of the time.Through bluetooth and mobile phone connection, real-time check of gas concentration, using the upper computer to control the operation mode of exhaust fan and change the gas concentration threshold. Modular programming is adopted in this study to improve the maintainability and facilitate debugging and modification in the later stage of the study. Through practical verification, the system can realize the detection of carbon monoxide and carbon dioxide concentration, real-time alarm monitoring, GPS positioning and change exhaust fan working mode and other functions, with real time, practicality and reliability.
Due to the limitation of satellite payload performance and the influence of space environment, large-capacity information transmission between satellites has always been a key difficulty in the field of inter-satellite information transmission. Laser communication has the characteristics of fast transmission rate and large information capacity, which is very suitable for large-capacity inter-satellite information transmission. This article introduces the related concepts of laser communication, investigates the development status of space laser communication and laser communication relay system, briefly introduces the representative laser communication satellite system, and summarizes the advantages and disadvantages of laser communication. The inter-satellite laser communication relay system is designed based on two different application scenarios. The inter-satellite distance and information transmission window are simulated based on the SGP4 model to verify the feasibility of the relay system to extend the inter-satellite laser communication. The engineering realization of the follow-up system has a certain meaning.
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