Temperature and humidity control system in a lunar base

In industrial production, temperature and humidity are common main manipulated parameters, especially in heat treatment industry, the temperature control is becoming more and more important. This paper from two aspects that hardware and software introduced single-chip microcomputer (SCM) C8051F intelligent temperature and humidity control system, and described schematic diagram of hardware and software. The design adds the integration of carbon dioxide concentration and light intensity detection and necessary communication function. It is a more humanized and more practical intelligent temperature and humidity measurement and control system.

Budidaya jamur kuping adalah salah satu sumber pangan yang baru. Budidaya ini memerlukan sistem pengendalian suhu dan kelembaban yang tepat untuk menghasilkan kualitas jamur kuping yang baik. Sekarang ini sudah banyak sistem pengendali suhu dan kelembaban untuk jamur baik secara manual ataupun otomatis, namun masih banyak kekurangannya seperti pemakaian alat yang mahal, kurang praktis perakitannya, dan pengoprasiannya tidak mudah. Penelitian ini bertujuan merancang dan membuat prototipe suatu sistem pengendali suhu dan kelembaban untuk budidaya jamur kuping yang lebih baik dari sistem-sistem pengendali yang sebelumnya. Metode penelitian ini dilakukan melalui 2 tahap utama yaitu perancangan konseptual dan perancangan alat dan sistem. Tahap perancangan konseptual meliputi identifikasi kebutuhan, perancangan sistem, dan pemilihan komponen. Tahap selanjutnya adalah penerapan alat dan sistem yang meliputi rangkaian mikrokontroler, sensor, alat pemanas, alat pendingin, perancangan sirkuit elektronik, hardware, pemrograman alat dan terakhir perakitan alat. Penelitian ini menghasilkan prototipe alat pengatur temperatur dan kelembaban dengan menggunakan mikrokontroler ATmega16, yang mampu meningkatkan kecepatan respon sistem pengendali temperatur pada budidaya jamur yang dilakukan secara otomatis, mudah dalam pengoperasian pengendali, praktis perakitannya, memiliki kemampu-rawatan yang mudah, dan memperbaiki realibilitas sistem terdahulu yang mana masih dilakukan secara manual. Alat pengatur temperatur dan kelembaban ini dapat membantu setiap petani jamur kuping baik yang sudah terlatih maupun belum. Hasil pemakaian alat ini dapat meningkatkan produktivitas hasil panen.

Intelligent temperature and humidity control system is widely adopted in many applications. However, in the greenhouse and storage facilities with large area, there is a conflict between cost and accuracy of temperature and humidity control. Therefore, this paper proposes a temperature and humidity detection module (THDM) suitable for storage applications. The THDM includes STM32 which is one popular single chip microcomputer, DH11 which is one kind of temperature and humidity sensor, ATGM332D module which supports the function of GPS and Beidou dual-mode positioning, and HC05 which is low-power Bluetooth communication module. The THDM not only transmits the temperature and humidity information, but also uploads the geographic location information. Therefore, the placement work is convenient, and the location of THDM can be freely configured according to the special needs and occasions. The maintenance work is also small. With the help of THDM, the intelligent temperature and humidity control system will be able to accurately obtain the temperature and humidity and other environmental information of the specific location, and make correct control decisions.

Crackers are one of the traditional foods in Indonesia which now has many home industries to produce it. There are 3 ways of drying, including traditional, modern, and hybrid. In the study of designing a temperature and humidity control system using the PID method on a trush burner cracker dryer, it was carried out in a modern way, with the materials needed for design, plastic waste, Arduino Uno, DHT11 sensor, oven, boiler, and pump. From the test results, the maximum water pipe testing was carried out at a temperature of 53 o C, the maximum drying room temperature was 45 o C, and the maximum boiler temperature was 56 o C. The function of the temperature and humidity control system on the trush burner type cracker dryer helps dry crackers practically in rainy season conditions

Oyster mushroom is one type of mushroom that is commonly consumed by Indonesian people which is relatively easy to cultivate. It can produce the optimum fruit body at temperatures below 30°C, the range of humidity is 60–90% with altitudes between 500–1000 meters above sea level. This paper describes on the development of the prototype of temperature and humidity control system in oyster mushroom cultivation using a fuzzy logic controller. The prototype comprises of DHT11 sensor for detecting temperature and humidity, Arduino microcontroller, mistmaker, and cooling fan. Fuzzy logic controller is installed in the Arduino microcontroller to generate an actuating signal for the mistmaker and cooling fan based on fuzzy inputs. The whole fuzzy system is designed using two inputs namely temperature and humidity with each input consist of three fuzzy sets with the triangular membership function. Meanwhile, the output variable is the speed of cooling fan with three fuzzy sets and triangular membership functions. A Mamdani inference system is adopted to achieve the control objective in the whole system. Based on the appropriate rule bases, fuzzy logic controllers are designed to produce the temperature and humidity setpoint around 27°C and 60–90 % respectively. Experimental results show the time response to achieve the setpoint span from 1 minute 27 seconds until 8 minutes 10 seconds.

This paper studies an embedded monitoring system centered on ZigBee technology to realize real-time temperature and humidity monitoring, and to ensure low power consumption, high reliability, low cost, and collection of environmental information. The communication is designed using the star topology, and the whole network structure is composed of a master node and three sensor receiving nodes to realize the unlimited transmission of network data. The main control point is to determine the coordination of the scope of the ZigBee network configuration system. The ZigBee network can communicate with the host through the data port to realize the acceptance of temperature and humidity data and the sending of commands. Based on this research, this paper determines the impact of non-target parameters on the actual measurement data of the multipoint temperature and humidity sensor, and at the same time determines the key influencing factors. For HMP-45D multipoint temperature and humidity, an improved genetic algorithm (GA) combined with a support vector machine (SVM) is used to compensate humidity and temperature data, which is designed to affect the actual measurement error of the multipoint temperature and humidity sensor. This paper studies the silver forging process, compares the environmental factors of silver carving, further puts forward the control strategy of Hagoun product forging and carving environment control from the perspective of temperature and humidity, and designs the environmental temperature and humidity measurement and control system from the perspective of temperature and humidity control. The system design proposed in this paper is mainly to construct and apply the silverware forging and engraving environment temperature and humidity measurement and control system on the basis of integration and maintenance-free and verify the effectiveness and feasibility of the system in the protection of cultural relics.

Addressing the challenge of ensuring a comfortable indoor environment in both commercial and residential buildings through the use of heating, ventilation, and air conditioning (HVAC) systems is a critical issue. This challenge is intricately connected to the development of sophisticated multi-channel controllers to regulate temperature and humidity effectively. This academic discussion initially focuses on the development and examination of a complex, interactive, nonlinear mathematical model that encapsulates the ideal parameters for temperature and humidity to achieve the desired comfort levels. The paper then progresses to explore various methodologies in the design of temperature and humidity control systems. It delves into the traditional Proportional-Integral-Derivative (PID) controllers, a mainstay in the industry, and extends to more advanced iterations. These include the integration of PID controllers with distinct decoupled controllers and the innovative combination of PID controllers with self-adjusting parameters, which are informed by the principles of fuzzy logic. This combination is particularly significant for the processes of heating and humidification. Subsequently, the paper presents the results obtained from simulations conducted on a proposed fuzzy-PID controller using Matlab, a widely used computational tool. These simulations are crucial in evaluating the efficacy of the controller design. Additionally, the paper offers an analysis of experimental data collected over a six-month period. This data is instrumental in assessing the real-world performance of the proposed system, providing valuable insights into its practical applicability and effectiveness in managing indoor climate conditions. In summary, this comprehensive study not only lays the groundwork for an interactive model for climate control but also compares various controller designs, culminating in the proposal and evaluation of an advanced fuzzy-PID controller. This work stands as a significant contribution to the ongoing efforts to enhance indoor climate control in buildings.

Accordance with the high Precision control problem of constant temperature and humidity air-conditioning system of wine storage of large underground cellar and based on the cellar building construction features and the reasonable allocation of ducts and valves., this paper proposes the distributed intelligent temperature and humidity PLC control solution and designs a remote monitoring system and gives the test results. Actual operating results show that the use of distributed PLC control constant temperature and humidity control system with high efficiency, low energy consumption, remote operation of the file, and meet the environmental requirements of various types of wine storage.

Chicken farmers in Indonesia face significant challenges due to the tropical climate, which causes temperature and humidity fluctuations that can impact chicken health and productivity. This research aims to design and implement an automated temperature monitoring and control system for chicken coops to address these issues. The chicken coop comprises components such as a DHT11 sensor, an ATmega328, and a SIM900 module, which serves as a communication device when the coop’s conditions deviate from comfort parameters. The coop is also equipped with a heater, fan, and blower. The system is designed to activate the heater when the temperature drops below a minimum threshold and activate the cooler when the temperature exceeds a maximum threshold. Calibration of the DHT11 sensor yielded an accuracy of 99.89%, indicating that this system has strong potential for application in innovative broiler chicken farming systems. The implementation of this system marks the first step in innovation for chicken coop environmental automation systems, specifically affordable, microcontroller-based coops with real-time data. This technology is expected to help farmers effectively monitor coop conditions and increase poultry productivity.

<div class="htmlview paragraph">Unique challenges arise during the design of temperature and humidity control systems (THCS) for use in microgravity. The design of the Plant Research Unit’s (PRU) THCS builds on the experience gained during the Biomass Production System (BPS) project and extends the understanding of the critical design variables and necessary technical advancements to allow for longer on-orbit operation. Previous systems have been limited by loss of prime, clogging in the porous plates and component reliability. Design of THCSs for long-duration space flight experiments requires the mitigation of these issues as well as a complete understanding of the relevant design variables. In addition to the normal design variables (e.g. mass, power, volume), a complex and interdependent relationship exists between the THCS variables including operational temperature range, operational humidity range, required humidity condensation rate and system air flow.</div>

Microfluidic Lab on a Chip (LOC) devices are key enabling technologies for research and industry due to their compact size, which increases the number of integrated operations while decreasing reagent use. Common operations within these devices such as chemical and biological reactions, cell growth, or kinetic measurements often require temperature control. Commercial temperature controllers are constrained by cost, complexity, size, and especially versatility for use in a broad range of applications. Small companies and research groups need temperature control systems that are more accessible, which have a wide applicability. This work describes the fabrication and validation of an inexpensive, modular, compact, and user-friendly temperature control system that functions within a microscope. This system provides precise temperature acquisition and control during imaging of any arbitrary sample which complies with the size of a microscope slide. The system includes two parts. The first part is a compact and washable Device Holder that is fabricated from high-temperature resistant material and can fit securely inside a microscope stage. The second part is a robust Control Device that incorporates all the necessary components to program the temperature settings on the device and to output temperature data. The system can achieve heating and cooling times between 50 °C and 100 °C of 32 s and 101 s, respectively. A Bluetooth enabled smartphone application has been developed for real-time data visualization. The utility of the temperature control system was shown by monitoring rhodamine B fluorescence in a microfluidic device over a range of temperatures, and by performing a polymerase chain reaction (PCR) within a microscope. This temperature control system could potentially impact a broad scope of applications that require simultaneous imaging and temperature control.

Temperature and humidity are two highly coupled variables in a control system, which need to be decoupled for effective control. Moreover, the coupling problem may get more severe and the two control loops may produce a strong interference to each other that can cause system instability when the humidity is measured by dry-and-wet bulb method. In this study, a control method based on fuzzy-neural-network was studied for solving the coupling problem. The shape of membership function can be adjusted in time by using a wavelet basis as the fuzzy membership function. An effective real-time decoupling control system for temperature and humidity could be realized by neural network fuzzy inference. Decoupling control tests were conducted in a control room with 1.6 m × 1.0 m × 4.0 m. The results show that the performance of the control system on dynamic response speed, stability, and anti-jamming have been improved after decoupling.

In the clean air conditioning system, in order to ensure that the temperature and humidity in the room are within the allowable accuracy range, it is necessary to control the dew point temperature. However, due to the inconsistency of the temperature and humidity control systems, the delay and inertia time constant of each channel are very different, so the dew point temperature is difficult to control. In order to achieve accurate control, multiple valves are opened at the same time in the system, which leads to energy loss, and usually a single circuit works normally. But when multiple chains work at the same time, the system is not easy to be stable. Therefore, in order to ensure the long-term safe operation of multi-parameter control system, making full use of mature technology and single variable control experience is an effective method to manage multi-parameter system.

Aiming at the flue-curing barn status quo in Guizhou tobacco growing area, the experiment on rebuilding the traditional flue-curing barn into bulk curing barn was conducted. Maintaining the main structure and draft system of original down draught barn, two single phase axial flow fans, a set of automatic temperature and humidity control system were installed, the stove and flue area were enlarged, and a partition was erected. The rebuilt barn features forced hot air circulation and automatic temperature and humidity control, each barn can accomodate 2000-2300kg of green leaf, the loading density reaches 54.13-70.38kg/m3.

With the continuous increase of voltage class and the rapid development of electrical equipment, we need to design a new kind of intelligent high voltage and high value resistors standard metering device which can be used to a much larger range to complete daily verification work. Based on MSP430 single-chip microcomputer, this paper designed the temperature and humidity control module and the high voltage measurement module that the measuring range can be automatically switched. By using this standard device, the measurement of voltage and resistance can reach separately to 10 kV and 200GΩ. At last by measuring the voltages and resistances and testing the temperature and humidity control system, it has indicated that the high voltage and high value resistors standard metering device in this paper meets the requirements.