A thermal model for real-time temperature forecast of rolling linear guide considering loading working conditions

2020 ◽  
Vol 109 (7-8) ◽  
pp. 2249-2271
Author(s):  
Xiao-Yi Wang ◽  
Hu-Tian Feng ◽  
Chang-Guang Zhou ◽  
Kun-Qi Ye
Keyword(s):  
Real Time ◽  
Working Conditions ◽  
Thermal Model ◽  
Linear Guide ◽  
Temperature Forecast

Communication Genres for Dispersed Real-Time Collaboration (RTC)

2011 ◽  
pp. 114-135
Author(s):  
Frank Frößler
Keyword(s):  
Real Time ◽  
Working Conditions ◽  
Mediated Communication ◽  
Communicative Practices ◽  
University Professor ◽  
Communication Practices

In this paper, the author examines RTC and its implications on people’s lives. This paper analyzes the production and reproduction of presence and awareness through (RTC-mediated) communication genres. Specifically, the author argues that presence and awareness are two interrelated concepts. Four communication genres are presented, which people intentionally or unintentionally draw on in dispersed settings to create awareness. Furthermore, presence, understood as a person’s sensation of being perceived by others in whatever he or she is doing, is influenced by the information imparted through communication genres. The author argues that the sensation of presence shapes the characteristics of communication genres and that RTC technology modifies existing or enables new communicative practices. Consequently, emerging RTC technologies may affect the sensation of presence in dispersed settings. The line of argument is developed by presenting the working conditions and communication practices of a university professor, working on several projects with both dispersed and co-located colleagues.

scholarly journals Design and Analysis of Refined Inspection of Field Conditions of Oilfield Pumping Wells Based on Rotorcraft UAV Technology

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1504 ◽  
Author(s):  
Yu Zhou ◽  
Chunxue Wu ◽  
Qunhui Wu ◽  
Zelda Makati Eli ◽  
Naixue Xiong ◽  
...  
Keyword(s):  
Real Time ◽  
Working Conditions ◽  
Working Condition ◽  
Oil Well ◽  
Monitoring Method ◽  
The Real ◽  
Multi Target Tracking ◽  
Key Factor ◽  
Real Time Detection ◽  
Rotorcraft Uav

The traditional oil well monitoring method relies on manual acquisition and various high-precision sensors. Using the indicator diagram to judge the working condition of the well is not only difficult to establish but also consumes huge manpower and financial resources. This paper proposes the use of computer vision in the detection of working conditions in oil extraction. Combined with the advantages of an unmanned aerial vehicle (UAV), UAV aerial photography images are used to realize real-time detection of on-site working conditions by real-time tracking of the working status of the head working and other related parts of the pumping unit. Considering the real-time performance of working condition detection, this paper proposes a framework that combines You only look once version 3 (YOLOv3) and a sort algorithm to complete multi-target tracking in the form of tracking by detection. The quality of the target detection in the framework is the key factor affecting the tracking effect. The experimental results show that a good detector makes the tracking speed achieve the real-time effect and provides help for the real-time detection of the working condition, which has a strong practical application.

Pediatricians’ working conditions in German hospitals: a real-time task analysis

2009 ◽  
Vol 169 (5) ◽  
pp. 551-555 ◽  
Author(s):  
Stefanie Mache ◽  
Karin Vitzthum ◽  
Bianca Kusma ◽  
Albert Nienhaus ◽  
Burghard F. Klapp ◽  
...  
Keyword(s):  
Real Time ◽  
Working Conditions ◽  
Task Analysis ◽  
Time Task

A Real-Time Thermal Model for Monitoring of Power Semiconductor Devices

2015 ◽  
Vol 51 (4) ◽  
pp. 3361-3367 ◽  
Author(s):  
Tanya Kirilova Gachovska ◽  
Bo Tian ◽  
Jerry L. Hudgins ◽  
Wei Qiao ◽  
John F. Donlon
Keyword(s):  
Real Time ◽  
Thermal Model ◽  
Semiconductor Devices ◽  
Power Semiconductor ◽  
Power Semiconductor Devices

A Real-Time Thermal Model of a Permanent-Magnet Synchronous Motor

2010 ◽  
Vol 25 (2) ◽  
pp. 463-474 ◽  
Author(s):  
Georgios D. Demetriades ◽  
Hector Zelaya de la Parra ◽  
Erik Andersson ◽  
Hakan Olsson
Keyword(s):  
Permanent Magnet ◽  
Real Time ◽  
Thermal Model ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor

Experimental Investigation on the Minichannel Cold Plate for High Temperature Uniformity Based on a Compact Thermal Model

2013 ◽  
Author(s):  
Xiaobing Luo ◽  
Zhangming Mao
Keyword(s):  
High Temperature ◽  
Working Conditions ◽  
Thermal Model ◽  
Maximum Temperature ◽  
Large Temperature ◽  
Heat Sources ◽  
Cold Plate ◽  
Temperature Uniformity ◽  
Maximum Temperature Difference ◽  
Maximum Value

A compact thermal model for multiple heat sources mounted on minichannel cold plate to achieve high temperature uniformity was presented in the authors’ previous work. In this paper, based on this compact thermal model, a fractal tree-like minichannel cold plate was designed and fabricated to obtain high temperature uniformity, and its thermal performance was tested under different working conditions by experiments. The comparison reveals that the measured temperatures are close to the ones predicted by the compact thermal model. The cold plate designed based on the compact thermal model can help multiple heat sources achieve high temperature uniformity, and the maximum temperature difference among the heat sources is 1.3 °C. Moreover, a straight minichannel cold plate was designed and tested under the same conditions. The measured results show that there exists relatively large temperature gap among the heat sources, and the maximum value is 6.7°C, which is much higher than 1.3 °C in the fractal tree-like minichannel. Therefore, the fractal tree-like microchannel or minichannel cold plate has an advantage over the straight one in obtaining temperature uniformity for multiple heat sources.

Design on Monitored Control System of Vessel Dynamic Cyclone Oily Water Separator

2012 ◽  
Vol 614-615 ◽  
pp. 608-612
Author(s):  
Wei Ren ◽  
Qiang Ma ◽  
Jing Lv
Keyword(s):  
Control System ◽  
Data Acquisition ◽  
Real Time ◽  
Working Conditions ◽  
Labview Software ◽  
Water Separator ◽  
Data Acquisition Card ◽  
Oily Water ◽  
Design Idea ◽  
Monitored Control System

The design idea of monitored control subsystem of vessel dynamic cyclone oily water separator is based on LabVIEW software platform, adopted DataSocket technology, by using DAQcard-A-16E-4E data acquisition card to realize real-time monitoring. This paper introduced the components of the monitored control system, analyzed its working conditions. According to the experimental operating records on some real ships, the application results and characteristics are summarized.

Discussion on Development and Application of Remove Automatic Metering Technology of Oil Well

2013 ◽  
Vol 457-458 ◽  
pp. 1538-1541
Author(s):  
Li Na Wang ◽  
Jin Liang ◽  
Sheng Li Zhang ◽  
Li Ya Wang
Keyword(s):  
Real Time ◽  
Working Conditions ◽  
Oil Well ◽  
Collection Process ◽  
Well Yield ◽  
Management Problems ◽  
Diagnosis Method ◽  
Further Development ◽  
Working Efficiency

The conventional dynamometer diagram diagnosis method of rod pumped well has the function to calculate the well yield based on the downhole dynagraph. In recent years, it can substitute for the traditional separator metering mode technically through further development and support to measure the oil well in an automatic and remote manner, analyze the working conditions and alarm in a real time manner, thus simplifying the collection process and improving the metering accuracy and working efficiency. In this paper, the technical and management problems in development and application of automatic metering technology of rod pumped well dynamometer diagram in Huabei Oilfield are discussed and solutions are proposed in order to guide the wide application of such technology in Huabei Oilfield.

scholarly journals Inverse Thermal Identification of a Thermally Instrumented Induction Machine Using a Lumped-Parameter Thermal Model

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 37 ◽  
Author(s):  
Pieter Nguyen Phuc ◽  
Hendrik Vansompel ◽  
Dimitar Bozalakov ◽  
Kurt Stockman ◽  
Guillaume Crevecoeur
Keyword(s):  
Motor Control ◽  
Real Time ◽  
Induction Motor ◽  
Condition Monitoring ◽  
Thermal Model ◽  
Computation Time ◽  
Absolute Error ◽  
Thermal Parameter ◽  
Maximum Absolute Error ◽  
Lumped Parameter

Accurate temperature estimation inside an electrical motor is key for condition monitoring, fault detection, and enhanced end-of-life duration. Additionally, thermal information can benefit motor control to improve operational performance. Lumped-parameter thermal networks (LPTNs) for electrical machines are both flexible and cost-effective in computation time, which makes them attractive for use in real-time condition monitoring and integration in motor control. However, the accuracy of these thermal networks heavily depends on the accuracy of its system parameters, some of which are difficult to calculate analytically or even empirically and need to be determined experimentally. In this paper, a methodology for the thermal condition monitoring of long-duration transient and steady-state temperatures in an induction motor is presented. To achieve this goal, a computationally efficient second-order LPTN for a 5.5 kW squirrel-cage induction motor is proposed to apprehend the dominant heat paths. A fully thermally instrumented induction motor has been prepared to collect spatial and temporal temperature information. Using the experimental stator and rotor temperature data collected at different motor operating speeds and torques, the key thermal parameter values in the LPTN are identified by means of an inverse methodology that aligns the simulated temperatures of the stator windings and rotor with the corresponding measured temperatures. Validation results show that the absolute average thermal modelling error does not exceed 1.45 °C with maximum absolute error of 2.10 °C when the motor operates at fixed speed and torque. During intermittent motor-loading operation, a mean (maximum) stator temperature error of 0.38 °C (0.92 °C) was achieved and mean (maximum) rotor errors of 2.11 °C (3.40 °C). These results show the validity of the proposed thermal model but also its ability to predict in real time the temperature variations in stator and rotor for condition monitoring and motor control.

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