Design Of Temperature Control System Research Articles

Design of a Multi-Channel PID Temperature Control System Based on PLC and Internet of Things (IOT)

Design of a Multi-Channel PID Temperature Control System Based on PLC and Internet of Things (IOT)

Design of Temperature Monitoring and Control System in Smart Hen Coop Based on Internet of Things

Every temperature error detected by the system would be notified to users by the Blynk application, and the system would attempt to stabilize the temperature in hen coop with a lamp and fan. Notification from the Blynk application is set to stop until the temperature returns to an ideal. The Blynk application is equipped with a reset button to reset the chicken age counter. This system used temperature and humidity sensors DHT22 to sense the temperature, which the data from the sensor output read by Arduino Uno. The data that Arduino Uno reads is sent to NodeMCU. Afterward, NodeMCU sent the data to the Blynk server; therefore, the Blynk application displayed the temperature and humidity data on the Blynk dashboard. This system is expected to facilitate users/breeders in monitoring the temperature in the hen coop. Therefore, users/breeders do not need to worry about chickens dying due to heat or cold stress. The waterfall method is used in this design of the system. This system was tested in a 70 x 70 x 130 cm sized hen coop and entirely tested the system each minute for 35 minutes.

A design of a household output water temperature control system based on the PID controller and feedforward control

Household bathroom products are facing the problems of input water temperature fluctuation and effluent temperature control delay, which brings trouble to consumers. This essay will propose a solution that controls the water temperature at the effluent end by adding a water tank and an electrical heater. The author establishes a mathematical model of the water tank and calculates the transfer functions of different parts of the control system. He also chooses a PID controller as the core of the closed-loop system. A feedforward control system is built into the design to reduce the effect of the disturbance. Simulink software is used to conduct the simulation experiment. The result of the simulation shows that the change in heat provided by the heater has the ability to control the temperature of the output water. Additionally, the feedforward control system can reduce the influence of the input water temperature effectively.

High-precision temperature control system design for laser diode

High-precision temperature control system design for laser diode

Phenomenological-based semi-physical model characterizing the central metabolic response of Escherichia coli to changes in batch culture temperature

This work presents a phenomenological-based semi-physical model characterizing the E. coli response to environmental temperature changes in batch cultures. The proposed model is based on a general description of the mass balance of the central metabolism and an energy balance that focuses on key parameters. This model can represent changes in specific growth rate and alteration to the mass flows of the central metabolism. Moreover, the model can make predictions regarding microorganism growth, respiratory rate, glucose consumption, acetate accumulation, and heat exchange between E. coli and its environment at several different temperatures. The fit and validation of the model was assessed against published data obtained under aerobic growth conditions in agitated tank bioreactor cultures. Our assessment of this model indicates that mass and energy balances can predict global changes in E. coli metabolism that are associated with different temperature conditions and differences in heat flow between bacteria and the environment. This model can be used to correlate environmental conditions with experimental bioreactor parameters and simulate microorganismal response during the design of temperature control systems for bioreactors and can even be used as a base model to represent heat-inducible E. coli strains used in recombinant protein production.

Design and Realization of Temperature and Speed Control System of Meyer Rod Coating Based on Arduino for Silver Nanowires Thin Film Applications

The design and implementation of an Arduino-based temperature and speed control system for Meyer rod coating have been successfully accomplished. The tool is capable of automatically regulating the temperature and speed of the plate and Meyer rod. The components utilized in manufacturing the coating tool include Arduino Uno, stepper motor, thermocouple sensor, heating plate, relay, stepper motor driver (TB6560), and thermocouple sensor supported by the MAX-6675 module. The motivation behind developing this tool stems from the inconsistency in temperature and speed during manual Meyer rod coatings, where substrate transfer to the heater is done manually. Therefore, the purpose of this tool is to make the rod's pressure and speed stable, and the substrate does not need to move. The results of this study are that the stepper motor achieved a remarkable speed accuracy of 99%, and the thermocouple sensor exhibited an accuracy of 88.43%. Further, the time required for the heater to reach 100 °C was 09.45 minutes.

Design of monitoring system for controlling the Temperature of chicken coops based on Internet of Things by utilizing Thingspeak

Broiler chickens are cattle whose growth is affected by ambient temperature. Inappropriate chicken cage temperatures can affect productivity and cause death in broiler chicken, so setting the cage temperature should be done. The design of this automatic temperature control system used the ESP32 microcontroller as the primary controller, the DHT22 as the enclosure temperature sensor and the ThingSpeak as remote monitoring. The microcontroller shall order if the measured temperature is above the set temperature limit and shall order the LED to light red, if the measured temperature is below the specified temperature limit to light blue, but due to the limitations of the author's LED material uses yellow. The results of the study showed that this automatic chicken coop temperature setting tool can work well to automatically regulate the chicken coop temperature and that the data on the results of this study would be entered into ThingSpeak and printed on the LCD.

Design and development of laser temperature control system of LHAASO

The Large High Altitude Air Shower Observatory (LHAASO) is located in Haizi Mountain, Daocheng County, Sichuan Province, with an average altitude of 4410 m. The Wide Field of view Cherenkov Telescope Array (WFCTA) is one of its three observation arrays. Laser calibration system for WFCTA consists of 2 nitrogen lasers and 1 Nd:YAG laser system. During the operation of WFCTA, the outdoor temperature may dropped from 17 °C to about -30 °C, which will bring serious challenges to the operation of laser calibration system operating in the field. In order to ensure the stable working environment and remote operation of the laser, we have developed the LHAASO-WFCTA laser temperature control, remote control and data monitoring system. The fluctuation of temperature in the box is within 1 °C around the target. The laser temperature control system was officially put into operation in Sept. 2020. In this paper, the design scheme, fabrication scheme, comparison of heat dissipation coefficient and test of temperature control system are introduced. The working data shows that both nitrogen molecule lasers and Nd:YAG laser temperature control system can achieve stable and long-term operation in high-altitude extreme field.

Pet Temperature, Humidity, and Light Control System Design Based on Single Chip Microcomputer

It is a domestic demand nowadays that people have a pet, plants, and kids or elders at home that must look after on. Sometimes, it is hard to tell if they are living in an appropriate environment where they feel comfortable. That would be troublesome when people go to work or have a vacation, leaving them at home alone. Also, some of the aspects are subjective and difficult to quantify, especially humidity and temperature. In order to reflect the surrounding environment accurately and intuitively, a pet-sitter system is implemented. In this design, the use of high reliability of the Microprogrammed Control Unit (MCU) as the processing core, to improve the pet environment of temperature and humidity, and light to achieve the function of the sub-function design. The main functions of the design include the collection, display, automatic control, and adjustment of temperature and humidity illumination. For the selection of equipment, with the goal of running stability and cost performance, the corresponding equipment is selected, and the final realization of temperature, humidity, and light regulation.

Design and application of heating device and temperature control system for dialysis fluid bag in continuous renal replacement therapy

In the process of continuous renal replacement therapy (CRRT), various factors such as the temperature of replacement fluid, the flow of fluid and the circulation of blood in cardiopulmonary bypass, lead to the temperature of the blood injected back into the body is often lower than normal. It leads to the decrease of body temperature and the occurrence of hypothermia, which can be life-threatening in severe cases. In clinical practice, medical staff mostly reduces the occurrence of hypothermia in patients with CRRT by means of the heating device of the machine, the heating of the liquid temperature box for cardiopulmonary bypass, and the application of heating blankets, but the effect is not ideal. Therefore, medical staff of the department of critical care medicine of the Second Affiliated Hospital of Anhui Medical University designed a heating device and temperature control system for CRRT dialysis fluid bag, and obtained the National Invention Patent of China (ZL 2021 1 0334906.7). The device includes a heating and thermal insulation device and a temperature control system, wherein the heating and thermal insulation device is composed of the body of the heating dialysis fluid bag and the temperature control structure, which solves the problems of safe and efficient liquid heating and thermal insulation during the CRRT process. The temperature control system can display the dynamic state of the patient's body temperature, adjust the temperature of the dialysis fluid bag in time, and monitor the temperature of the blood transfusion in real time through the cooperation of the five modules of data collection, data handle, data analysis, regulation and display. This design is applied to CRRT, which can achieve precise control of body temperature of critically ill patients, and has certain clinical significance.

Design of Temperature Control System

Design of Temperature Control System

Thermodynamic model of HVAC under building exterior wall

In order to solve the problem under the exterior wall of a building, the author proposes a thermodynamic model for HVAC. Scientific and technological progress has promoted social development, under the new development situation, people have higher requirements for living environment. In architectural design, residential environment design is the key content, especially the design of indoor temperature control system. With the continuous promotion of the national sustainable development strategy, the current architectural design pays more at?tention the green design concept, and the HVAC design is the key design content in realizing the green architectural design. In order to make HVAC design more scientific and reasonable, the author studied the concept that HVAC design needs to follow from the perspective of green buildings, and analyzed the specific ap?plication methods of HVAC design technology. The experimental results indicate that the building envelope parameters have a great impact on the building thermodynamic performance, and the annual cooling and heating loads of buildings should be comprehensively considered, reasonably determine the building envelope parameters. The building load has a low support value, so only low quality energy can meet the building load demand, when selecting the HVAC system, consider the matching of energy quality, try to introduce low grade energy, and improve energy utilization efficiency.

Design of high-precision integrated temperature control system of spaceborne blackbody

Design of high-precision integrated temperature control system of spaceborne blackbody

High-Precision Semiconductor Laser Current Drive and Temperature Control System Design.

To solve the problem in which the output power and wavelength of semiconductor lasers in fiber optic sensing systems are easily affected by the drive current and temperature, a high-precision current drive and temperature control system was developed in this study. The embedded system was used to provide a stable drive current for the semiconductor laser through closed-loop negative feedback control; moreover, some measures, such as linear slow-start, current-limiting protection, and electrostatic protection, were adopted to ensure the stability and safety of the laser's operation. A mathematical model of the temperature control system was constructed using mechanism analysis, and model identification was completed using the M sequence and differential evolution (DE) algorithms. Finally, the control rules of the fuzzy proportional integral differentiation (PID) algorithm were optimized through system simulation to make it more suitable for the temperature control system designed in this research, and the accurate control of the working temperature of the semiconductor laser was realized. Experimental results showed that the system could achieve a linearly adjustable drive current in the range of 0-100 mA, with an output current accuracy of 0.01 mA and a temperature control accuracy of up to 0.005 °C.

Design of Energy-saving Temperature Control System for Data Center Based on Artificial Intelligence

Design of Energy-saving Temperature Control System for Data Center Based on Artificial Intelligence

Prediction of molten pool temperature and processing quality in laser metal deposition based on back propagation neural network algorithm

Stability of molten pool temperature directly affects the dimensional accuracy, metallurgical defects, solidification microstructure and mechanical properties of formed parts manufactured by laser metal deposition technology. Therefore, the optimization of the macroscopic morphology and microstructure of the formed parts through the stable control of the molten pool temperature has been intensively studied. In this study, three models, based on the back propagation neural network (BPNN), random forest (RF) algorithms and response surface methodology (RSM) approach, respectively, were used to establish prediction relationships between the deposition input parameters and processing status parameters, geometric morphology and mechanical property parameters. Then, the processing temperature and molten pool characteristics of thirty groups of 316L stainless steel single-track cladding layers were analyzed. The prediction results show that the average prediction error (APE) of the prediction of molten pool temperature, track width, track height and micro-hardness of the deposited layer based on BPNN model are 0.5%, 1.3%, 2.9% and 0.1%, respectively, which are better than the prediction results of RF and RSM models. Then, BPNN model was further used to predict the molten pool temperature and processing quality of the deposited layer under the combination of five new process parameters groups. Objective of this study was to lay the foundation for the subsequent design of the molten pool temperature control system to improve the morphology accuracy and mechanical properties of formed parts.

Optimization to Assist Design and Analysis of Temperature Control Strategies for Injection Molding-A Review.

Injection molding (IM) is the most widespread and economical way to obtain high-quality plastic components. The process depends, however, to a great extent, on the quality and efficiency of the injection molding tools. Given the nature of the IM process, the temperature control system (TCS), its design, and its efficiency are of utmost importance for achieving the highest possible quality of plastic parts in the shortest possible time. For that reason, the implementation of additive manufacturing (AM) in novel IM temperature control strategies has gained considerable interest in academia and industry over the years. Conformal cooling channels (CCCs) are TCSs that have already demonstrated great potential when compared to conventional gun-drilling systems. Nevertheless, despite the recent advances, the design of these systems is still an open field of study and requires additional research in both aspects deemed as critical: thermo-mechanical models and the application of optimization techniques. This review paper tackles all the relevant, available papers on this topic, highlighting thermo-mechanical models developed by TCS designers and the optimization techniques used. The articles were thoroughly analyzed, and key points on the design of new TCS and new opportunities were identified.

Design of Real-Time Temperature Monitoring and Control System for Multimodal Ablation

Design of Real-Time Temperature Monitoring and Control System for Multimodal Ablation

Design of spaceborne self-closed loop extensible temperature control system based on FPGA

Abstract The paper describes the design method and implementation of a self-closed loop extensible temperature control system for spaceborne based on FPGA. FPGA is used as the core of data processing System. Firstly using the high accuracy AD and analog switch for temperature data collection. The FPGA is to filter data by average calculation, voltage correction algorithm and PWM controlling temperature algorithm. Finally, after processing temperature control parameters, according to the corresponding channel relation it outputs temperature control parameters to the corresponding control output on NMOS. It can be uploaded temperature threshold parameters through SPI bus, and the corresponding relationship parameters between temperature control and temperature measurement can be modified, and it carry out the remote sensing function on the earth. The system can realize multi-system cascade temperature control through Rs422 bus. This process realizes a complete self-closed loop process, and finally achieves the system design goal.

Analysis and experimental research on high frequency magnetic properties of different magnetostrictive materials under variable temperature conditions

Magnetostrictive materials have excellent magneto-mechanical properties and are widely used in the field of energy conversion. Temperature has an important influence on the magnetic properties of them. Accurately studying the temperature dependence of magnetostrictive materials is a necessary prerequisite for the design of precision actuators. In this paper, we constructed a high-frequency magnetic property measurement system that can control the temperature. The magnetic characteristics of Terfenol-D, Fe-Ga and Fe-Co were measured at temperatures ranging from 10 °C to 80 °C, the frequencies from 1 kHz to 20 kHz and magnetic induction amplitudes from 0.01 T to 0.07 T. The temperature dependence of the three materials under different exciting conditions was comprehensively compared. The variation trends and temperature sensitivities of the coercivity, permeability, equivalent inductance, equivalent resistance and the magnetic energy losses are analyzed respectively. The results of this paper are oriented to practical engineering applications and can be used for high-frequency loss prediction and temperature control system design.