The Implementation of Instrumentation Systems of Fire Truck Simulator Based on PLC

2012 ◽  
Vol 571 ◽  
pp. 593-599
Author(s):  
Li Wen Wang ◽  
Xi Chen ◽  
Li Shan Jia
Keyword(s):  
Distributed Control ◽  
High Speed ◽  
High Reliability ◽  
Serial Communication ◽  
Advanced Technology ◽  
Stepper Motor ◽  
Programming Environment ◽  
Serial Port ◽  
Stepper Motor Control ◽  
Pulse Output

The structures of the instrumentation systems of the airport fire truck simulator uses a distributed control of the PC and PLC, combined with the advanced technology of the widespread use of the stepper motor control of the instrument. And combined stability, adaptability and strong anti-jamming capability of PLC and the stepper motor’s positioning accuracy, ease of control, and high reliability. It is used the unique high-speed pulse output function of PLC to realize the real time and accurate control of stepper motor. It is also use the serial port class SerialPort in VC + + 6.0 programming environment on Serial communication side. The experiment proved that the system design is reasonable, and the instrument can be a smooth, quiet and accurate operation.

Application of PLC Pulse Command in the Step Motor Position Control

2011 ◽  
Vol 130-134 ◽  
pp. 3954-3957
Author(s):  
Liu Wei
Keyword(s):  
Motor Control ◽  
High Speed ◽  
Position Control ◽  
Step Motor ◽  
Stepper Motor ◽  
Equipment Selection ◽  
Stepper Motor Control ◽  
Key Issues ◽  
Pulse Output

Mitsubishi FX2n series PLC's CPU module comes with high-speed pulse output channels. Using these channels, you can achieve position control of stepper motor. This article describes the use of high-speed pulse output instruction on the stepper motor control to achieve the design points. Contents include: key issues of PLC equipment selection, use of pulse command, and the stepper motor selection and setting.

Study and Realize of High-Speed Data Transmission System Based on MODEM

2012 ◽  
Vol 155-156 ◽  
pp. 77-81
Author(s):  
Jing Zhang ◽  
Wei Dong
Keyword(s):  
Data Transmission ◽  
High Speed ◽  
Serial Communication ◽  
Transmission System ◽  
Serial Port ◽  
System Configuration ◽  
High Speed Data ◽  
Data Transmission System ◽  
Speed Data Transmission

System uses micro-controller MSP430 as MCU of a whole system, using an embedded MODEM as a MODEM of data of system, MODEM connection with the microcontroller through the serial port, using another chip of microcontroller to implement a serial communication with PC interface in order to achieve the overall system configuration. The innovations of author: system uses the data achieved by MSP430F149 to transmission system,it has some versatility, it is through an embedded MODEM module connection with the UART of microcontroller for data transmission.

scholarly journals Research on Performance Test System of Space Harmonic Reducer in High Vacuum and Low Temperature Environment

Machines ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Jing Wang ◽  
Zhihua Wan ◽  
Zhurong Dong ◽  
Zhengguo Li
Keyword(s):  
Low Temperature ◽  
High Speed ◽  
Performance Test ◽  
High Reliability ◽  
High Vacuum ◽  
Test System ◽  
Low Noise ◽  
Speed Ratio ◽  
Space Harmonic ◽  
Temperature Environment

The harmonic reducer, with its advantages of high precision, low noise, light weight, and high speed ratio, has been widely used in aerospace solar wing deployment mechanisms, antenna pointing mechanisms, robot joints, and other precision transmission fields. Accurately predicting the performance of the harmonic reducer under various application conditions is of great significance to the high reliability and long life of the harmonic reducer. In this paper, a set of automatic harmonic reducer performance test systems is designed. By using the CANOpen bus interface to control the servo motor as the drive motor, through accurately controlling the motor speed and rotation angle, collecting the angle, torque, and current in real time, the life cycle test of space harmonic reducer was carried out in high vacuum and low temperature environment on the ground. Then, the collected data were automatically analyzed and calculated. The test data of the transmission accuracy, backlash, and transmission efficiency of the space harmonic reducer were obtained. It is proven by experiments that the performance data of the harmonic reducer in space work can be more accurately obtained by using the test system mentioned in this paper, which is convenient for further research on related lubricating materials.

The Design of the NC Teaching Plotter Based on Single Chip Microcomputer

2014 ◽  
Vol 909 ◽  
pp. 342-345
Author(s):  
Xin Juan Shang
Keyword(s):  
Motor Control ◽  
Teaching Practice ◽  
Nc Machining ◽  
Numerical Control ◽  
Stepper Motor ◽  
Single Chip ◽  
Single Chip Microcomputer ◽  
Nc Program ◽  
Practice Teaching ◽  
Stepper Motor Control

The NC Teaching Plotter is designed for the practice teaching needs of NC machining, In order to improve current existing practice teaching environment of "many student, less equipment". It explains the NC concept with concise way and demonstrates NC thought by the intuitive operation.In this paper, the design of NC teaching plotter makes interpolation motion between pen and table based on NC program in accordance with the requirement made by user, to draw the graphics by moving the magnet control brush painting through the single chip digital control and the two stepper motor control X, Y two axes feed. The NC teaching plotter which demonstrates more clearly and directly the numerical control idea has high practical value for teaching practice.

scholarly journals Broadband Wireless Channel in Composite High-Speed Railway Scenario: Measurements, Simulation, and Analysis

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Jianwen Ding ◽  
Lei Zhang ◽  
Jingya Yang ◽  
Bin Sun ◽  
Jiying Huang
Keyword(s):  
Ray Tracing ◽  
Communication Systems ◽  
High Speed ◽  
Channel Model ◽  
High Reliability ◽  
Rapid Development ◽  
Path Loss ◽  
Wireless Channel ◽  
Delay Spread ◽  
High Speed Railway

The rapid development of high-speed railway (HSR) and train-ground communications with high reliability, safety, and capacity promotes the evolution of railway dedicated mobile communication systems from Global System for Mobile Communications-Railway (GSM-R) to Long Term Evolution-Railway (LTE-R). The main challenges for LTE-R network planning are the rapidly time-varying channel and high mobility, because HSR lines consist of a variety of complex terrains, especially the composite scenarios where tunnels, cuttings, and viaducts are connected together within a short distance. Existing researches mainly focus on the path loss and delay spread for the individual HSR scenarios. In this paper, the broadband measurements are performed using a channel sounder at 950 MHz and 2150 MHz in a typical HSR composite scenario. Based on the measurements, the pivotal characteristics are analyzed for path loss exponent, power delay profile, and tap delay line model. Then, the deterministic channel model in which the 3D ray-tracing algorithm is applied in the composite scenario is presented and validated by the measurement data. Based on the ray-tracing simulations, statistical analysis of channel characteristics in delay and Doppler domain is carried out for the HSR composite scenario. The research results can be useful for radio interface design and optimization of LTE-R system.

Aluminum Reflow Sputtering

MRS Bulletin ◽  
1995 ◽  
Vol 20 (11) ◽  
pp. 53-56 ◽  
Author(s):  
Kuniko Kikuta
Keyword(s):  
Integrated Circuit ◽  
High Speed ◽  
Lower Cost ◽  
High Reliability ◽  
Device Fabrication ◽  
Damascene Process ◽  
Aspect Ratios ◽  
Multi Level ◽  
Poor Adhesion ◽  
Lower Resistivity

The scaling of integrated-circuit device dimensions in the horizontal direction has caused an increase in aspect ratios of contact holes and vias without a corresponding scaledown in vertical dimensions. Conventional sputtering has become unreliable for handling higher aspect-ratio via/contact holes because of its poor step coverage. Several studies have attempted to overcome this problem by using W-CVD and reflow technology. The W-CVD is used for practical device fabrications. However, this technique has several problems such as poor adhesion to SiO2, poor W surface morphology, greater resistivity than Al, and the need of an etch-back process.Al reflow technology using a conventional DC magnetron sputtering system can simplify device-fabrication processes and achieve high reliability without Al/W interfaces. In particular, the Al reflow technology is profitable for multi-level interconnections in combination with a damascene process by using Al chemical mechanical polishing (CMP). These interconnections are necessary for miniaturized and high-speed devices because they provide lower resistivity than W and simplify fabrication processes, resulting in lower cost.This article describes recent Al reflow sputtering technologies as well as application of via and interconnect metallization.

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