Design and Implement of Intelligent Monitoring System Driven by Ultrasonic Motor

2013 ◽  
Vol 765-767 ◽  
pp. 2199-2202
Author(s):  
Hao Yin ◽  
Hua Feng Li
Keyword(s):  
Tracking System ◽  
Response Speed ◽  
Video Camera ◽  
Fast Response ◽  
Ultrasonic Motor ◽  
Quick Response ◽  
Tracking Accuracy ◽  
Intelligent Monitoring ◽  
Ultrasonic Motors ◽  
And Control

A visual tracking system based on ultrasonic motors is designed in view of shortcoming of traditional video surveillance system, which has a large volume, complicated structure. The pan-tilt can rotate in horizontal and vertical directions by using two ultrasonic motors served as the driving units. The image from video camera is processed and the target is identified and real-time tracked by rotating the pan-tilt which is controlled by ultrasonic motor. Compared with electromagnetic motor, the ultrasonic motor has advantages of high torque at low speed, quick response, high precision and self-locked, which makes the structure simpler and control more convenient. Experimental results show that the system can be stably tracking the selected target with fast response speed and relatively high tracking accuracy.

scholarly journals Modeling and analysis of responsive space launch system based on timed colored Petri NeT

2022 ◽  
Vol 355 ◽  
pp. 02014
Author(s):  
Qian Zhang ◽  
Xinhong Li
Keyword(s):  
Response Speed ◽  
Fast Response ◽  
Demand Model ◽  
Modeling And Analysis ◽  
Cpn Tools ◽  
Space Launch ◽  
Level Model ◽  
Basic Characteristics ◽  
And Control ◽  
Measurement And Control

Responsive space launch is currently developing rapidly and has application cases in many fields, with advantages such as fast response speed and flexible networking. Aiming at the efficiency evaluation of responsive space launch system, this article first summarizes the typical process of fast space launch, and then gives a hierarchical model of a space fast launch system based on timed colored Petri nets, including top-level model, demand model, command decision model, launch Model, measurement and control model, and finally use CPN Tools to simulate and verify the model, analyze the basic characteristics of the model and the performance of the system, and provide data support and theoretical basis for the optimization of the fast space launch system.

The Design of Servo System for Azimuth of Directional Antenna Based on PMSM

2013 ◽  
Vol 748 ◽  
pp. 723-726
Author(s):  
Han Zhong Liu ◽  
Mao Fa Hua ◽  
Tao Zhao ◽  
Fu Lin Teng
Keyword(s):  
Tracking System ◽  
Servo System ◽  
High Gain ◽  
Open Loop ◽  
Directional Antenna ◽  
Tracking Accuracy ◽  
Dynamic Regulation ◽  
And Control ◽  
Measurement And Control ◽  
Very High

directional antenna is widely used in the measurement and control for Short range UAV because of its high gain in the range of beam angle, the speed of UAV is very fast, so the requirements for speed and acceleration of directional antenna is very high, step motors are usually in the traditional directional antenna systems, which works in the open loop and has low positioning accuracy, slow speed response and dynamic regulation, In order to meet the requirements of the directional antenna servo system, the design of servo control system for Azimuth of directional antenna based on PMSM and CAN bus communication is introduced in this paper . The test results indicate that the dynamic response of antenna servo system is very quick and tracking accuracy is very high. which can be well applied in the target tracking system.

Modeling and control of a 2-degree-of-freedom gyro-stabilized platform driven by ultrasonic motors

2018 ◽  
Vol 29 (11) ◽  
pp. 2324-2332 ◽  
Author(s):  
Song Pan ◽  
Yipeng Wu ◽  
Jianhui Zhang ◽  
Shengqiang Zhou ◽  
Hua Zhu
Keyword(s):  
Control System ◽  
Dynamic Response ◽  
Ultrasonic Motor ◽  
Degree Of Freedom ◽  
Modeling And Control ◽  
Ultrasonic Motors ◽  
Motor Controller ◽  
Stabilized Platform ◽  
Differential Control ◽  
And Control

This article specially designed and demonstrated a new ultrasonic motor and its control system based on the dynamic model of the 2-degree-of-freedom gyro-stabilized platform. The factors such as mechanical resonance, torque and moment inertia coupling, and nonlinearity of the driver were also taken into account during the optimization of the robust proportional–integral–differential control system. Finally, the controller was implemented by an ultrasonic motor and an embedded microcontroller. Experimental results showed that, comparing with the traditional electromagnetic motor controller, the proposed ultrasonic motor controller had the better control performances in dynamic response, static accuracy, isolation, and so on. A practical prototype of the gyro-stabilized platform with stronger robustness was also developed at the same time.

Electrochemical NOx Sensors for Automotive Diesel Exhaust

2002 ◽  
Vol 756 ◽  
Author(s):  
Louis P. Martin ◽  
Ai-Q. Pham ◽  
Robert S. Glass
Keyword(s):  
High Sensitivity ◽  
Response Speed ◽  
Fast Response ◽  
Exhaust Gas ◽  
Oxides Of Nitrogen ◽  
Monitoring And Control ◽  
Stabilized Zirconia ◽  
Exact Role ◽  
And Control

ABSTRACTNew emissions regulations will increase the need for compact, inexpensive sensors for monitoring and control of automotive exhaust gas pollutants. Species of interest include hydrocarbons, carbon monoxide, and oxides of nitrogen (NOx). The current work is directed towards the development of fast, high sensitivity electrochemical NOx sensors for automotive diesel applications. We have investigated potentiometric NO sensors with good sensitivity and fast response when operated in 10% O2. The sensors consist of yttria-stabilized zirconia substrates attached with NiCr2O4 sensing electrodes and Pt reference electrodes. A composite NiCr2O4:Rh sensing electrode is shown to give significantly faster response than NiCr2O4 alone. The exact role of the Rh in enhancing the response speed is not clear at present. However, the Rh appears to accumulate at the contacts between the NiCr2O4 particles and may enhance the inter-particle electronic conduction. Ongoing testing of these sensors is being performed to elucidate the sensing mechanisms and to quantify cross sensitivity to, for example, NO2.

Adaptive Signal Analysis and Interpretation for Real-time Intelligent Patient Monitoring

1994 ◽  
Vol 33 (01) ◽  
pp. 60-63 ◽  
Author(s):  
E. J. Manders ◽  
D. P. Lindstrom ◽  
B. M. Dawant
Keyword(s):  
Computer Architecture ◽  
Real Time ◽  
Data Abstraction ◽  
Monitoring Strategy ◽  
Intelligent Monitoring ◽  
Patient Status ◽  
On Line ◽  
Main Components ◽  
And Control ◽  
Adaptive Signal

Abstract:On-line intelligent monitoring, diagnosis, and control of dynamic systems such as patients in intensive care units necessitates the context-dependent acquisition, processing, analysis, and interpretation of large amounts of possibly noisy and incomplete data. The dynamic nature of the process also requires a continuous evaluation and adaptation of the monitoring strategy to respond to changes both in the monitored patient and in the monitoring equipment. Moreover, real-time constraints may imply data losses, the importance of which has to be minimized. This paper presents a computer architecture designed to accomplish these tasks. Its main components are a model and a data abstraction module. The model provides the system with a monitoring context related to the patient status. The data abstraction module relies on that information to adapt the monitoring strategy and provide the model with the necessary information. This paper focuses on the data abstraction module and its interaction with the model.

scholarly journals Tin Disulfide-Coated Microfiber for Humidity Sensing with Fast Response and High Sensitivity

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 648
Author(s):  
Aijie Liang ◽  
Jingyuan Ming ◽  
Wenguo Zhu ◽  
Heyuan Guan ◽  
Xinyang Han ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
Small Diameter ◽  
High Sensitivity ◽  
Large Change ◽  
Small Variation ◽  
Response Speed ◽  
Fast Response ◽  
Tin Disulfide ◽  
Recovery Times ◽  
Response And Recovery

Breath monitoring is significant in assessing human body conditions, such as cardiac and pulmonary symptoms. Optical fiber-based sensors have attracted much attention since they are immune to electromagnetic radiation, thus are safe for patients. Here, a microfiber (MF) humidity sensor is fabricated by coating tin disulfide (SnS2) nanosheets onto the surface of MF. The small diameter (~8 μm) and the long length (~5 mm) of the MF promise strong interaction between guiding light and SnS2. Thus, a small variation in the relative humidity (RH) will lead to a large change in optical transmitted power. A high RH sensitivity of 0.57 dB/%RH is therefore achieved. The response and recovery times are estimated to be 0.08 and 0.28 s, respectively. The high sensitivity and fast response speed enable our SnS2-MF sensor to monitor human breath in real time.

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