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相关概念视频

Transformers with Off-Nominal Turns Ratios01:25

Transformers with Off-Nominal Turns Ratios

160
In scenarios involving parallel transformers with disparate ratings, developing per-unit models requires accommodating off-nominal turns ratios. This situation arises when the selected base voltages are not proportional to the transformer’s voltage ratings. Consider a transformer where the rated voltages are related by the term a. If the chosen voltage bases satisfy a relationship involving term b, term c is defined as the ratio of these bases. This ratio is then substituted into the...
160
Transformers in Distribution System01:27

Transformers in Distribution System

103
Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
103
Transformers01:26

Transformers

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A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or windings, wrapped around the same soft iron core. However, they are electrically insulated from each other.
The iron core has a substantial relative permeability. Therefore, the magnetic field lines generated due to the current in one winding are almost entirely confined within the core, such that the same magnetic flux permeates each turn of both...
1.1K
Instrument Transformers01:23

Instrument Transformers

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Instrument transformers, comprising voltage transformers (VTs) and current transformers (CTs), play crucial roles in power substations by providing isolated replicas of current or voltage for measurement and protection purposes. Voltage transformers reduce the primary voltage to levels suitable for relay operation and measurement, while current transformers scale down the primary current. The primary winding of a current transformer often consists of a single turn, achieved by threading the...
87

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自动路边摄像机校准与变压器.

Yong Li1, Zhiguo Zhao1, Yunli Chen1

  • 1The Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China.

Sensors (Basel, Switzerland)
|December 9, 2023
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种基于变压器的路边摄像头自我校准模型. 它通过整合场景和车辆特征来提高准确性和稳定性,同时考虑几何和语义信息.

关键词:
摄像机的校准 摄像机的校准变压器的变压器是一个变压器.消失点检测 消失点检测 消失点检测

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科学领域:

  • 计算机视觉 计算机视觉
  • 机器学习 机器学习

背景情况:

  • 现有的相机自我校准方法由于特征提取有限,因此难以处理各种场景.
  • 以前的方法通常集中在场景或车辆线索上,或者仅仅是几何或语义信息,阻碍了全面的分析.
  • 传统的消失点方法需要复杂的手动调整和额外的模型,增加错误的可能性.

研究的目的:

  • 开发一种创新的路边摄像机自我校准模型.
  • 在各种交通场景中提高适应性,特征提取和校准准确性.
  • 为了减少操作复杂性和相机自我校准中的潜在错误.

主要方法:

  • 提出了一种使用变压器架构的新型自我校准模型.
  • 在交通场景中同时学习场景和车辆特征.
  • 整合了几何和语义信息,用于全面的特征提取.

主要成果:

  • 拟议的模型显示了更高的校准准确性和稳定性.
  • 与现有方法相比,在真实世界和公共数据集上取得了更高的性能.
  • 成功克服了以往场景和车辆救援为中心的方法的局限性.

结论:

  • 基于变压器的模型为路边摄像机自我校准提供了更有效和更强大的解决方案.
  • 同时学习各种特征可以显著改善校准结果.
  • 该方法与传统的自我校准技术相比,具有显著的进步.