With the rapid development of highway construction, highway tunnels, as an important part of it, play a crucial role in traffic safety with their tunnel lighting brightness, while also needing to address energy consumption issues. This paper analyzes existing technical research, proposes a control strategy based on traffic volume adjustment, and further optimizes the brightness of highway tunnel lighting. By establishing a segmented model for tunnel lighting, the entrance segment brightness attenuation coefficient K related to traffic volume and vehicle speed is fitted using MATLAB to obtain the equation for optimizing tunnel lighting brightness. Based on the control strategy of traffic volume adjustment, the system achieves lighting when vehicles approach and dimming when they depart. Simulation experiment results demonstrate that under the control strategy based on traffic volume adjustment, the system can ensure driving safety and effectively reduce energy consumption. This strategy, particularly for the application of long tunnels with low traffic volume, is of significant importance.
In this paper, a LoRa network protocol based on CSMA/CA access mechanism and asynchronous downlink mode is proposed for the communication problem in the LoRa network according to the star network model. The protocol aims to improve LoRa network performance, reduce the risk of node conflicts, and achieve stable and efficient data transmission. In this paper, the network parameters of the protocol are determined, and the protocol mechanism, backoff algorithm, and asynchronous downlink mode are designed. The performance improvement of the improved protocol in terms of normalized throughput, communication collision rate, average communication delay is verified through simulation analysis. In the case of 150 nodes competing for the channel at the same time, this protocol has a better performance compared to the original protocol, which can improve the throughput, reduce the communication collision by 11% and reduce the delay by 83ms.
To solve the problem of uneven flow distribution of constant humidity gas in the gas pipeline network, this paper uses FLUENT to simulate the flow field and pressure of the butterfly valve and concludes that the butterfly valve can be used to regulate the flow distribution. Based on the above conclusions, the authors designed a butterfly valve controller, which can drive the butterfly valve to open and close through the driver chip to regulate the flow in the pipeline network. Finally, through experimental verification, it is shown that the butterfly valve controller can adjust the flow resistance coefficient of each branch by controlling the opening and closing degree of the butterfly valve, and the most suitable adjustment range of the opening and closing degree of the butterfly valve is 20°-40°.
As the main transportation tool at the construction site, the tower crane is essential for operation. In order to avoid collisions with the surrounding obstacles or other tower cranes when running, this article designs a tower crane anti -collision algorithm. This algorithm first models the tower crane and obstacles, and realizes the collision monitoring between the tower crane and the obstacles by dynamically calibrating the alarm area around the obstacles; The information interaction, combined with the trajectory prediction algorithm to implement the collision monitoring between the tower cranes; at the same time, it is proposed to apply the Kalman filter to the trajectory prediction of the tower crane to improve the accuracy of the risk prediction; in the end, through the QT design simulation platform, And use randomly generated tower cranes to run data to verify its effectiveness. After testing, the algorithm can effectively avoid the occurrence of tower crane collision accidents, and has certain application prospects.
KEYWORDS: Light sources and illumination, Intelligence systems, Control systems design, Control systems, Telecommunications, Light emitting diodes, LED lighting, Analog electronics, Lamps, Signal processing
As an important part of ensuring traffic safety of highway tunnel, highway tunnel lighting system has some problems such as high energy consumption and low degree of intelligence in its use. In this paper, a set of intelligent dimming system for highway tunnel lighting is designed, which takes the environmental variables such as luminance value and traffic flow information inside and outside the tunnel as input, establishes the intelligent dimming mathematical calculation model, adjusts the output power of the system in real time, and then adjusts the brightness of LED lamps. At the same time, the system connects with the remote management system through Ethernet remote communication technology, and can also realize the function of remote dimming. It improves the intelligent level of highway tunnel lighting and reduces the energy consumption of highway tunnel lighting system.
Aiming at the problems of cumbersome, time-consuming, inefficient and unable to create an accurate and controllable light environment for the input of the dimming system in the existing road tunnel lighting dimming quality inspection process, this paper designed a set of road tunnel lighting brightness intelligent detection system. The system fixes 5 illuminance sensors in a vehicle-mounted manner to achieve continuous measurement of longitudinal measurement points on the tunnel road surface and synchronous measurement of lateral measurement points; a programmable light source installed outside the tunnel provides a controllable brightness input for the dimming system, and uses the LoRa wireless technology completes the long-distance wireless communication with the inspection vehicle, which can realize the analysis and management of the measurement data. The whole system is convenient, efficient and intelligent, which can be applied to highway tunnel lighting quality monitoring and operation management.
KEYWORDS: Light sources and illumination, Control systems, Telecommunications, Clouds, Data communications, Analog electronics, Digital filtering, Real-time computing, Light emitting diodes, LED lighting
Highway tunnel lighting equipment, as an important equipment to ensure traffic safety in highway tunnel, has some problems in its production, installation, commissioning and operation, such as low intelligence degree and weak man machine interaction operation. On the basis of studying the existing test methods of highway tunnel lighting equipment, this paper designs an improved test process and method of highway tunnel lighting equipment, builds a cloud management platform for test data, realizes the automatic test of highway tunnel lighting equipment by using remote client combined with Ethernet, realizes the intellectualization of test process and the standardization of test data. The database and background management software deployed on the remote server can realize the classified management of many kinds of test data. The system can improve the testing efficiency of lighting equipment for the highway tunnel lighting equipment production enterprises, and improve the management efficiency and quality for the highway tunnel lighting management department.
More and more attention has been paid to the protection of cultural relics. However, many cultural relics are damaged to varying degrees due to improper exhibition environment. The factors causing the damage are relatively complex, which are generally completed by the synergy of temperature and humidity, particulate matter, acid air, atmospheric microorganisms and other related factors. In this paper, the microenvironment of museum display cabinet is regarded as the main task of cultural relic protection technology research. A kind of Microenvironment Control System of cultural relic display cabinet is designed, which can control the humidity of the microenvironment in the display cabinet in real time, and can also remove harmful gases and microorganisms for the microenvironment in the display cabinet to purify the microenvironment in the display cabinet, With the help of the gas distribution device, the system can control the humidity of the micro environment of several display cabinets or even the whole museum by a constant humidity machine, and solve the problem of gas pollution in the display cabinet by controlling the air purification device.
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