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Intelligent pneumatic suction device for cabin of domestic vehicle 一种家用汽车驾驶室智能气动吸气装置
Hui Huang, Yifa Sheng
In this paper, a smart pneumatic suction device for the cabin of a domestic car has been developed to solve the problem of hidden driving safety and vehicle performance degradation caused by changes in the working environment of the cabin caused by foreign objects trapped in the gap of the cabin. The device consists of a removable suction head, a universal hose, and a foreign body collection It consists of a silo and a negative pressure generator. The control system uses the single-chip K66 core board as the central calculation link, and the digital air pressure sensor is used as the feedback signal mechanism to convert the air pressure signal in the suction head into a digital signal and transmit it to the single chip through the IIC of the single chip; the PWM signal is converted and amplified to Drive the current of the RS-540 DC motor to achieve PID closed-loop control to achieve the effect of controlling the air pressure and stabilizing the air pressure; use the WH148 single-connect potentiometer to form a simple voltage divider circuit, and generate different voltage signals by rotating the potentiometer to achieve continuous adjustment Knob. The device has the characteristics of portability, high efficiency, simple operation, large market potential, and broad development and application prospects.
本文针对某国产轿车客舱缝隙内夹带异物,导致客舱工作环境发生变化,导致车内行驶安全隐患和车辆性能下降的问题,研制了一种智能气动吸入装置。该装置由可移动的吸头、通用软管和异物收集器组成,由筒仓和负压发生器组成。控制系统采用单片机K66核心板作为中央计算环节,采用数字式气压传感器作为反馈信号机构,将吸气头内的气压信号转换为数字信号,并通过单片机的IIC传输到单片机;将PWM信号进行转换放大,驱动RS-540直流电机的电流,实现PID闭环控制,达到控制气压、稳定气压的效果;使用WH148单接电位器组成简单的分压电路,通过旋转电位器产生不同的电压信号,实现连续调节旋钮。该装置具有便携、高效、操作简单等特点,市场潜力大,发展应用前景广阔。
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引用次数: 0
Design and Manufacturing Technology of Planar Coil for Magnetic Recoil Generator 磁后坐力发电机平面线圈的设计与制造技术
Qiao Lu, Liming Li, Rui Zhang
In order to improve the productivity efficiency of the magnetic recoil generator, the coil part of the device is optimized, and the traditional winding coil is replaced by the planar coil. The planar coil adopts the way of laser precision cutting after layer plating metal film to form a split conductor structure, so as to reduce the energy loss caused by skin effect. In this paper, the influence of magnetron sputtering parameters on the tensile strength and deposition rate of metal film on planar coil substrate was studied experimentally. The specific process parameters were determined as follows: target substrate distance was set at 8cm, working vacuum was 1Pa, argon gas flow rate was 100sccm when copper and nichrome films were plated. The target power is set at 188W for copper coating and 156W for nichrome coating. The resistance of the planar coil obtained by metal film plating and laser precision cutting is tested, which meets the product requirements.
为了提高磁后坐力发电机的生产效率,对装置的线圈部分进行了优化,将传统的绕线线圈改为平面线圈。平面线圈采用层镀金属膜后激光精密切割的方式,形成分体导体结构,从而减少了集肤效应造成的能量损失。实验研究了磁控溅射参数对平面线圈衬底上金属薄膜的拉伸强度和沉积速率的影响。具体工艺参数确定为:镀铜镍铬膜时,目标衬底距离为8cm,工作真空度为1Pa,氩气流量为100sccm。铜涂层的目标功率为188W,镍铬涂层的目标功率为156W。对金属镀膜和激光精密切割得到的平面线圈的电阻进行了测试,符合产品要求。
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引用次数: 0
Underwater Acoustic Target Classification Based on LOFAR Spectrum and Convolutional Neural Network 基于LOFAR谱和卷积神经网络的水声目标分类
Xiaohan Yin, Xiaodong Sun, Peishun Liu, Liang Wang, Ruichun Tang
The underwater acoustic target classification task has always been an important research direction of acoustic recognition and classification. The acoustic classification models include traditional models such as Gaussian Mixture Model (GMM), and deep learning models such as Convolutional Neural Network (CNN) and Long and Short Time Memory Network (LSTM). This paper proposes a deep sound feature extraction network based on VGGNet. An underwater acoustic target classification framework based on LOFAR spectrum and CNN is proposed. Although ordinary CNN can also extract underwater acoustic features, too few or too many network layers will cause problems such as insufficient features or increased calculations. Therefore, we draw on the excellent structure of VGGNet in feature extraction and delete several layers for feature extraction and classification of underwater acoustic targets. The accuracy are 94%, 98% and 96% respectively in three real data sets of civil ships, and the accuracy were improved com-pared with the traditional methods.
水声目标分类任务一直是水声识别与分类的重要研究方向。声学分类模型包括高斯混合模型(GMM)等传统模型和卷积神经网络(CNN)、长短时记忆网络(LSTM)等深度学习模型。本文提出了一种基于VGGNet的深度声音特征提取网络。提出了一种基于LOFAR频谱和CNN的水声目标分类框架。虽然普通的CNN也可以提取水声特征,但网络层过少或过多都会导致特征不足或计算量增加等问题。因此,我们利用VGGNet在特征提取方面的优良结构,删除若干层进行水声目标的特征提取和分类。在3个民用船舶真实数据集上,准确率分别达到94%、98%和96%,与传统方法相比,准确率有了提高。
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引用次数: 7
Analysis of Visual Distribution Optimization of Power Grid Based on Data Mining 基于数据挖掘的电网分布可视化优化分析
Chengsi Wang
The continuous development of intelligent distribution technology in China has driven the vigorous construction of smart grid. Different data information systems play a vital role in the application of the distribution network, so the data scale of distribution network is expanding, and the complexity of data information is increasing. In order to accurately dig out the hidden laws from the operation and maintenance process of the smart grid, and ensure the stable operation of the smart grid, this study uses data mining related technologies to conduct an in-depth analysis of the visual power distribution technology of the grid. The results show that when the previous item is an uncertain situation such as unplanned power outages or faulty power outages, the data mining results of the latter item include light and no-load distribution transformers, heavy and planned power outages, which are caused by poor maintenance work, so more visual power distribution technology should be used. This study provides a certain reference for the optimization of power grid visualization distribution technology.
中国智能配电技术的不断发展,带动了智能电网的蓬勃建设。不同的数据信息系统在配电网的应用中起着至关重要的作用,因此配电网的数据规模不断扩大,数据信息的复杂性日益增加。为了准确挖掘智能电网运维过程中的隐藏规律,保证智能电网的稳定运行,本研究利用数据挖掘相关技术,对电网可视化配电技术进行深入分析。结果表明,当前一项是意外停电或故障停电等不确定情况时,后一项的数据挖掘结果包括轻、空载配电变压器、重、计划停电,这些都是由于维护工作不佳造成的,因此应更多地采用可视化配电技术。本研究为电网可视化配电技术的优化提供了一定的参考。
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引用次数: 0
Real-time Safety Helmet Detection System based on Improved SSD 基于改进SSD的安全帽实时检测系统
B. Dai, Yuhu Nie, WenpengCui Cui, Rui Liu, Zhe Zheng
The detection of the safety helmet is difficulties due to the ariable ighting, weather changes and complex background. We proposed a deep learning detection method to detect safety helmet to solve the problems of low accuracy and poor robustness of traditional detection methods. This method is based on the SSD (Single Shot MultiBox Detector) object detection and improved the network. First, we used the fusion of multi-layer to consideration of shallow low sematic information and deep semantic information, which improves the sensitivity of the network to small target detection. Second, we proposed lightweight network structure of compresses the network, reducing the amount of parameters and calculations of the model. Third, we made safety helmet datasets to train and test the improved network model, and the model is compared with the original SSD. The results show that the detection accuracy of the model is 86.75%, which is similar to SSD, but the detection speed has been improved significantly, which is 295% higher than SSD, up to 83 frame/s. Experiments show that the improved network model can significantly improve the detection speed while ensuring the detection accuracy and meet the real-time detection requirements.
由于光照多变、天气变化和背景复杂,安全帽的检测存在困难。针对传统检测方法准确率低、鲁棒性差的问题,提出了一种深度学习检测安全帽的方法。该方法是在SSD (Single Shot MultiBox Detector)目标检测的基础上对网络进行改进的。首先,利用多层融合的方法兼顾了浅层低语义信息和深层语义信息,提高了网络对小目标检测的灵敏度;其次,我们提出了压缩网络的轻量级网络结构,减少了模型的参数和计算量。第三,制作安全帽数据集对改进后的网络模型进行训练和测试,并与原SSD进行比较。结果表明,该模型的检测准确率为86.75%,与SSD相似,但检测速度有了明显提高,比SSD提高了295%,达到83帧/秒。实验表明,改进后的网络模型能够在保证检测精度的同时显著提高检测速度,满足实时性检测要求。
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引用次数: 9
Study on Prediction Model of Magnetic Field Intensity of Submarine Power Cable Based on LSTM 基于LSTM的海底电力电缆磁场强度预测模型研究
Jianping Wu, Xi Yang, Huan Wang, Jianping Chen, Quanzhong Zhao, B. Xiao
After the submarine power cables are laid, the parameters such as distance between cables and surface of the sea (H), distance between two submarine power cables placed in parallel (d) are constant. It is difficult to study the magnetic field intensity distribution of submarine power cable under different H and d, because the submarine cable can't be placed randomly. In order to solve this problem, firstly the influence of different groups of H and d on the distribution of submarine cable magnetic field intensity is studied, and the magnetic field intensity of submarine cable generated by different groups of H and d are used as training samples and testing samples. Then the training samples are used to construct the submarine power cable magnetic field prediction model based on Long Short Term Memory (LSTM) neural network, and the submarine power cable magnetic field is predicted with the testing samples as the input. Finally, the simulation results show that there is good prediction ability of LSTM prediction model for submarine cable magnetic field data.
海底电力电缆敷设后,电缆与海面的距离(H)、两条平行敷设的海底电力电缆之间的距离(d)等参数是恒定的。由于海底电缆不能随机放置,因此研究不同H和d下海底电力电缆的磁场强度分布比较困难。为了解决这一问题,首先研究了不同H组和d组对海底电缆磁场强度分布的影响,并将不同H组和d组产生的海底电缆磁场强度作为训练样本和测试样本。然后利用训练样本构建基于长短期记忆(LSTM)神经网络的海底电力电缆磁场预测模型,以测试样本作为输入对海底电力电缆磁场进行预测。最后,仿真结果表明LSTM预测模型对海底电缆磁场数据具有较好的预测能力。
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引用次数: 1
Feature Point Matching Based on Four-point Order Consistency in the RGB-D SLAM System 基于四点顺序一致性的RGB-D SLAM系统特征点匹配
Xingwang Liu, Haijiang Zhu, Zhicheng Wang
Random sample consensus (RANSAC) method is often utilized in the RGB-D Simultaneous localization and mapping (SLAM) systems and it is time-consuming because of more repeated fitting the transformation matrix. This paper aims to find a feature point matching method that can reduce computation time in the RGB-D SLAM system. We explore an approach based on four-point order-preserving constraint to determine inliers between two adjacent images. Firstly, the four-point order-preserving constraint between two frames is established to find the good inliers. Then, the 3D points corresponding to the good inliers are obtained to compute the transformation matrix in SLAM system. Finally, the localization and mapping in SLAM system are implemented from transformation matrix and the Global Graph Optimization (g2o) framework. The results indicate that our method is faster and more accurate than the RANSAC algorithm. The less computational time is significant for the real-time SLAM system, and the proposed method is clearly helpful for that.
随机样本一致性(RANSAC)方法在RGB-D同步定位与映射(SLAM)系统中常用,但由于需要对变换矩阵进行多次拟合,耗时较长。本文旨在寻找一种能够减少RGB-D SLAM系统计算时间的特征点匹配方法。我们探索了一种基于四点保序约束的方法来确定两个相邻图像之间的内线。首先,建立两帧之间的四点保序约束,寻找良好的内层;然后,得到良好内层对应的三维点,计算SLAM系统中的变换矩阵。最后,利用变换矩阵和全局图优化(g20)框架实现了SLAM系统的定位和映射。结果表明,该方法比RANSAC算法更快、更准确。对于实时SLAM系统来说,计算时间的减少是非常重要的,而所提出的方法显然有助于实现这一目标。
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引用次数: 0
Research on Pollution Flashover Detection of Power Insulator Based on High Frequency Electromagnetic Wave 基于高频电磁波的电力绝缘子污闪检测研究
Qiu Xia, Chenyu He, Yifan Liu, Zihao Shi, Yu Chen
In power system accidents, power insulators account for a large proportion of pollution flashover accidents caused by pollution. Real-time detection of pollution flashovers is an important guarantee for reducing power system accidents. This paper proposes a principle of using partial discharge of polluted insulators to generate electromagnetic waves to achieve pollution flashover detection. According to the characteristics of electromagnetic waves, this method selects the corresponding frequency band antenna to receive and amplify electromagnetic wave signals, filter out signal interference, and perform data analysis and processing to detect pollution flashover. Experiments show that this method has high detection accuracy and strong anti-interference ability. It can judge the severity of pollution and the type of pollution in real time. It has strong practicability and is widely used.
在电力系统事故中,电力绝缘子在因污染引起的污闪事故中占很大比例。污染闪络的实时检测是减少电力系统事故的重要保证。提出了一种利用受污染绝缘子局部放电产生电磁波来实现污染闪络检测的原理。该方法根据电磁波的特点,选择相应频段的天线接收和放大电磁波信号,滤除信号干扰,并进行数据分析处理,检测污染闪络。实验表明,该方法检测精度高,抗干扰能力强。可以实时判断污染的严重程度和污染类型。实用性强,应用广泛。
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引用次数: 1
Tooth Point Cloud Segmentation of Dental Model Based on Region Growing 基于区域生长的牙齿模型牙点云分割
Jiawen He, Shigang Wang, Jian Li
Single tooth segmentation is an important technique for computer-assisted orthodontic restoration. Aiming at the problem of interdental region fusion in digital 3D dental model and the limitations of traditional tooth segmentation methods such as complex interactive operations and high manual interference, a tooth point cloud segmentation method based on region growing is proposed. First, the curvature information is used to identify and extract the Gum-tooth boundary feature area, and the points of the gum area and the tooth area are segmented by the region growing method. Then, the local distribution density is used to extract the interdental fusion region, and any point of each tooth is selected as the seed point for region growing. Finally, the point cloud segmentation result of each tooth is obtained. The experimental results show that the proposed algorithm can effectively reduce manual intervention and realize the point cloud segmentation of each tooth of the dental model more accurately.
单牙分割是计算机辅助正畸修复的重要技术。针对数字三维牙齿模型牙间区域融合问题和传统牙齿分割方法交互操作复杂、人工干扰大的局限性,提出了一种基于区域增长的牙齿点云分割方法。首先,利用曲率信息对牙龈-牙齿边界特征区域进行识别和提取,并采用区域生长法对牙龈区域和牙齿区域的点进行分割;然后,利用局部分布密度提取牙间融合区域,选择每颗牙齿的任意一点作为区域生长的种子点。最后,得到每颗牙齿的点云分割结果。实验结果表明,该算法可以有效减少人工干预,更准确地实现对牙齿模型每颗牙齿的点云分割。
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引用次数: 2
Design of Software and Hardware for Large Bridge Deformation Monitoring System 大型桥梁变形监测系统的软硬件设计
Qing An, Yanhua Chen, Shusen Wu
Aiming at the technical problems of realizing all-weather, full-automatic, high-precision and high-reliability on-line 3D deformation monitoring and early-warning of bridges, taking Wuhan Baishazhou Yangtze River Bridge as an example, a 3D deformation monitoring and early-warning system for bridges with real-time monitoring, intelligent alarm, advanced prediction and dynamic evaluation based on GNSS / GIS high-precision fusion positioning technology is developed. The experimental results show that the monitoring system can realize the functions of unmanned collection, fast and safe transmission, automatic solution processing and visual early warning of 3D deformation information of Baishazhou bridge, and achieve the deformation positioning accuracy of real-time centimeter level and afterwards millimeter level, which can provide decision support for bridge management.
针对实现桥梁全天候、全自动、高精度、高可靠性在线三维变形监测预警的技术问题,以武汉白沙洲长江大桥为例,开发了基于GNSS / GIS高精度融合定位技术的实时监测、智能报警、超前预测、动态评价的桥梁三维变形监测预警系统。实验结果表明,该监测系统能够实现白沙洲大桥三维变形信息的无人采集、快速安全传输、自动解处理和可视化预警功能,实现实时厘米级和事后毫米级的变形定位精度,可为桥梁管理提供决策支持。
{"title":"Design of Software and Hardware for Large Bridge Deformation Monitoring System","authors":"Qing An, Yanhua Chen, Shusen Wu","doi":"10.1145/3421766.3421831","DOIUrl":"https://doi.org/10.1145/3421766.3421831","url":null,"abstract":"Aiming at the technical problems of realizing all-weather, full-automatic, high-precision and high-reliability on-line 3D deformation monitoring and early-warning of bridges, taking Wuhan Baishazhou Yangtze River Bridge as an example, a 3D deformation monitoring and early-warning system for bridges with real-time monitoring, intelligent alarm, advanced prediction and dynamic evaluation based on GNSS / GIS high-precision fusion positioning technology is developed. The experimental results show that the monitoring system can realize the functions of unmanned collection, fast and safe transmission, automatic solution processing and visual early warning of 3D deformation information of Baishazhou bridge, and achieve the deformation positioning accuracy of real-time centimeter level and afterwards millimeter level, which can provide decision support for bridge management.","PeriodicalId":360184,"journal":{"name":"Proceedings of the 2nd International Conference on Artificial Intelligence and Advanced Manufacture","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129954322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Proceedings of the 2nd International Conference on Artificial Intelligence and Advanced Manufacture
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