The method and implementation of automatic, fuzzy surface temperature control for laser processing

2018 ◽  
Author(s):  
Grzegorz Witkowski ◽  
Leszek Płonecki ◽  
Krystian Mulczyk ◽  
Piotr Kurp
Keyword(s):  
Surface Temperature ◽  
Temperature Control ◽  
Laser Processing

scholarly journals A climatic thermostat making Earth habitable

2005 ◽  
Vol 4 (1) ◽  
pp. 3-7 ◽  
Author(s):  
Peter D. Ditlevsen
Keyword(s):  
Surface Temperature ◽  
Temperature Control ◽  
Black Body ◽  
Black Body Radiation ◽  
Cold Climate ◽  
Snowball Earth ◽  
Greenhouse Warming ◽  
Radiative Balance ◽  
The Mean ◽  
Warm State

The mean surface temperature on Earth and other planets with atmospheres is determined by the radiative balance between the non-reflected incoming solar radiation and the outgoing long-wave black-body radiation from the atmosphere. The surface temperature is higher than the black-body temperature due to the greenhouse warming. Balancing the ice-albedo cooling and the greenhouse warming gives rise to two stable climate states. A cold climate state with a completely ice-covered planet, called Snowball Earth, and a warm state similar to our present climate where greenhouse warming prevents the total glaciation. The warm state has dominated Earth in most of its geological history despite a 30% fainter young Sun. The warming could have been controlled by a greenhouse thermostat operating by the temperature control of the weathering process depleting CO2 from the atmosphere. This temperature control has permitted life to evolve as early as the end of the heavy bombardment 4 billion years ago.

Development of Semiconductor Direct Output Laser Processing System and Research of Temperature Control Strategy

Applied laser ◽  
2015 ◽  
Vol 35 (1) ◽  
pp. 115-123
Author(s):  
徐元飞 Xu Yuanfei ◽  
胡晓冬 Hu Xiaodong ◽  
姚建华 Yao Jianhua ◽  
Volodymyr Kovalenko Volodymyr Kovalenko
Keyword(s):  
Temperature Control ◽  
Control Strategy ◽  
Laser Processing ◽  
Processing System ◽  
Output Laser

INFLUENCE OF DEPOSITION AND FOULING ON WALL TEMPERATURE DISTRIBUTION IN CONVECTIVE PATH

2020 ◽  
pp. 1-21
Author(s):  
Deli Li ◽  
Enlu Wang ◽  
Jinda Mao ◽  
Wei Wu ◽  
Yiyang Wang
Keyword(s):  
Temperature Distribution ◽  
Surface Temperature ◽  
Temperature Control ◽  
Theoretical Calculations ◽  
Influence Factors ◽  
Control Technology ◽  
Tube Surface ◽  
Gas Temperature ◽  
Surface Distribution ◽  
Super Heater

Abstract To develop a method of controlling the deposit tube surface temperature, the rules of deposition and fouling on the fireside, and the influence factors of the surface distribution were determined through experiments and theoretical calculations. The surface temperature distribution of a clean tube was compared with that of a deposit tube. Through theoretical calculations, the influence factors of the deposit tube surface temperature were evaluated. Based on the investigation, surface temperature control technology applicable to a super-heater was proposed and the feasibility of this heater was determined. A bimodal distribution was obtained when the temperature distribution of the deposit tube was plotted as a function of the angle, whereas a unimodal distribution was obtained for the clean tube. The results revealed that the heat exchange tube surface temperature is most effectively controlled by controlling the flue gas temperature. Prior to the development of higher performance materials (compared with conventional materials), surface temperature control technology can be used to ensure that the super-heater surface temperature lies below the allowable temperature of existing super-heater materials.

Clinical Effect of Intelligent Temperature Control System in Preventing Skin Burns Caused by Tumor Hyperthermia

2020 ◽  
Vol 10 (5) ◽  
pp. 1249-1256
Author(s):  
Rongjun Tang ◽  
Qingqing Yu ◽  
Ke Zhang ◽  
Qinghua Deng ◽  
Shenglin Ma ◽  
...  
Keyword(s):  
Control System ◽  
Treatment Group ◽  
Surface Temperature ◽  
Temperature Control ◽  
Clinical Effect ◽  
High Surface ◽  
Cooling Water ◽  
Temperature Control System ◽  
Control Group ◽  
Tumor Hyperthermia

Objective: To investigate the clinical effect of skin’s surface temperature using intelligent temperature control system of deep tumor hyperthermia for patients with thorax and abdomen cancer. Methods: Patients with thorax and abdomen cancer were selected to perform the in-house developed intelligent surface temperature control system for hyperthermia, and this method was compared to the conventional manipulating of cooling water bag replacement. Results: The first cooling cycle was started at 24 minute and 22 minute respectively after the beginning of hyperthermia in patients with thorax and abdomen cancer for the treatment group performed intelligent surface temperature control system. The average cycle cooling number was 2.5 for this treatment group. The control group started to replace the water bag with patients reminding at 33 minute and 34 minute respectively. The average replacements number was 3.6 for the control group. The monitoring highest surface temperature at first started cooling circulatory system and cooling water bag replacement were 38.5°, 39.1°, respectively, abdomen cancer were 38.8°, 40.1°, respectively. There were 1 case and 4 cases occurring above II empyrosis between treatment and control group respectively, and 0 case and 3 cases were observed in abdomen cancer. Conclusion: Using intelligent surface temperature control system of deep tumor hyperthermia for the thorax and abdomen cancer could monitor and cooling down the high surface temperature earlier compared with conventional cooling water replacement.

Temperature Control during Mixing of Rubber Compounds

1955 ◽  
Vol 28 (4) ◽  
pp. 1157-1165
Author(s):  
Frank L. Roth ◽  
George E. Decker ◽  
Robert D. Stiehler
Keyword(s):  
Heat Transfer ◽  
Surface Temperature ◽  
Temperature Control ◽  
Practical Method ◽  
Manual Control ◽  
National Bureau ◽  
Heat Transfer Characteristics ◽  
Considerable Time ◽  
Automatic Temperature Control ◽  
Rubber Compounds

Abstract A study was made of the effect of the surface temperature of the rolls of a 6 × 12-inch laboratory mill on the properties of GR-S compounds and means of controlling this temperature. It was found that the properties of the GR-S compound depend on the surface temperature of the mixing rolls. No practical method of controlling the temperature of conventional rolls was found because of the slow rate of heat transfer. Therefore three types of special rolls, including one designed at the National Bureau of Standards, were investigated. The heat transfer characteristics of the NBS rolls permitted automatic control of their temperatures to within 7° F during mixing of natural rubber and several synthetic elastomers, with only one controller being used. A mill with the special NBS rolls has been in operation for about a year, and has resulted in a marked improvement in the control of mixing of rubber compounds. The automatic temperature control has been much more convenient than manual control, and has saved considerable time, since the rolls do not have to be warmed by milling scrap rubber.

Dynamic Mold Temperature Control Using Gas-Assisted Heating and Its Effect on the Molding Replication Qualities of Micro Channels

2008 ◽  
Author(s):  
Shia-Chung Chen ◽  
Yaw-Jen Chang ◽  
Jen-An Chang ◽  
Hsin-Shu Peng ◽  
Ying-Chieh Wang
Keyword(s):  
Injection Molding ◽  
Surface Temperature ◽  
Temperature Control ◽  
Heating System ◽  
Mold Temperature ◽  
Mold Surface ◽  
Water Heating ◽  
Molded Part ◽  
Micro Channels ◽  
Gas Heating

Dynamic mold surface temperature control (DMTC) has the advantage of improving molded part qualities without significant increases in cycle time. A gas-assisted heating system combined with water cooling was developed to achieve DMTC for injection molding. With gas-assisted heating, it takes 2s for the mold surface temperature to vary from 60 °C to 120 °C whereas it requires 186s using water heating. Further, it takes 21s and 84s for the mold surface to cool to 60 °C under gas heating and water heating, respectively. The gas-assisted heating system also shows excellent efficiency for micro injection molding of biochips to achieve high replication accuracy of the micro channels.

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