基于STM32的农业智能烤烟房温湿度控制仪的设计

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.

Objective To investigate the clinical effectiveness of an intelligent shell temperature control system in deep tumor hyperthermia for controlling the temperature in the outer shell of chest and abdominal malignancies. Methods From 2015 to 2016, a randomized comparative study was carried out in the intelligent temperature control system (experimental group containing 37 patients with chest tumor and 26 patients with abdominal tumor) and conventional cooling by replacement of water bags (control group containing 37 patients with chest tumor and 25 patients with abdominal tumor) for chest and abdominal tumor hyperthermia. The effectiveness in controlling the outer shell temperature was compared between the two methods. Results In the experimental group, the first boot of the cooling system occurred at 24.1 and 21.8 minutes on average after the hyperthermia started and the average number of system boots was 2.5. In the control group, patients reminded to replace the water bag at 33.1 and 33.8 minutes on average after the hyperthermia started and the average number of replacements was 3.6. The highest outer shell temperature in patients with chest tumor and abdominal tumor averaged 38.5 and 39.1 ℃ at the first boot of the cooling system in the experimental group and 39.3 and 40.4 ℃ at the first replacement of the cooling water bag in the control group, respectively. The treatment with and without the intelligent temperature control system caused grade ≥Ⅱ empyrosis in 1 and 4 patients with chest tumor and in 0 and 3 patients with abdominal tumor, respectively. Conclusions In deep tumor hyperthermia, compared with the conventional cooling by replacement of water bags, the intelligent shell temperature control system can detect and cool the high-temperature zone in the outer shell at an earlier time, which effectively reduces the incidence of skin burn injury. Key words: Deep hyperthermia; Scalded skin; Temperature control

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.

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.

In order to derive the efficient utilization of low pressure compressed air fogging system, cooling efficiencies with control types were analyzed through cooling experiments in tomato greenhouses. The control types were set up with temperature control, humidity control, temperature and humidity control, and time control. It showed that the cooling effects were 0.7 to <TEX>$3.3^{\circ}C$</TEX> on average and maximum of 4.3 to <TEX>$7.0^{\circ}C$</TEX>, the humidification effects were 3.5 to 13.5 % on average and maximum of 14.3 to 24.4 %. Both the cooling and humidification effect were the highest in the time control method. The cooling efficiency of the air fogging system was not high with 8.3 to 27.3 % on average. However, the cooling efficiency of 24.6 to 27.3 % which appears from the time control is similar to the cooling efficiency of high pressure fogging system experimented in Japan. The air fogging system is operated by low pressure, but its efficiency is similar to high pressure. We think because it uses compressed air. From this point of view, we suggest that the air fogging system can get the cooling efficiency of similar levels to that of high pressure fogging system and it will have an advantage from clogging problem of nozzle etc.

In this study, the heat effectiveness and energy efficiency of the clove drying machine with control of temperature and relative air humidity were analysed. The data were carried out experimentally on a clove dryer machine that has 3 racks with staggered arrangement by varying the speed of the air flow into the drying chamber. The hot air produced from a heater and blown to the drying chamber used a fan with 3 various speed rate (1.9 m/s, 2.3 m/s, 2.8 m/s). The heat distribution on each rack was observed and analysed and compared with the energy requirements of the machine. The result showed that the heat flow on the rack evenly distributed. The fluid flow variation has the important effect. The heat will more effective with the lower air flow speed, which the higher heat transfer (q) to the clove from the heater depend on the air flow speed with the higher value 72.78 watt at the lowest positions rack with hot air speed 2.8 m/s. The energy efficiency of the machine was about 37 percent, with the highest value 39.27 percent at the air speed 2.3 m/s.

Although several new solutions for greenhouse heating and environmental control are being investigated all over the world; to reduce energy consumption and environmental impacts, to increase the efficiency of energy use for plant production in protected cultivation or to take advantage of the new renewable energy sources, in Portugal the great majority of producers still rely on more conventional heating systems for an economical year round production of vegetables and flowers.The objective of this work is to review some guidelines to help the grower when choosing the best heating solutions for different crops and cultivation systems.First, the level of heating required is defined and the correspondent heating power is analysed.Secondly, the main heating systems are mentioned including their components, characteristics, effects on greenhouse climate, soil and plant temperature.Relative costs of equipment and energy consumption are analyzed and some examples of practical solutions are presented from vegetable and flower production growers.Finally, several strategies to reduce the energy required for greenhouse heating are given and studied, including greenhouse structures, covering materials, thermal screens, air temperature and humidity control.

Aimed at the temperature and humidity nonlinear variation and coupling phenomena in tobacco bulk curing, an artificial intelligence based controller is proposed. The controller using a microcomputer and fuzzy decoupling control technique can meet the requirements of temperature and humidity variation, the coupling phenomena is prevented, thereby improved the quality of fluecured tobacco. The controller has built-in several specialist technology curves suitable for different characteristics tobacco leaves. The composition of the controller, principle of the intelligent control and the fuzzy controller design are presented in this paper. The control method can be applied to other temperature and humidity control field when it is changed in some sort, has popularization and application value.

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.

Optimal and near-optimal indoor temperature and humidity controls for direct load control and proactive building demand response towards smart grids

Due to the requirements of production process, the production area of cigarette factory is generally equipped with large process air conditioner to realize high-precision constant temperature and humidity control. Under the typical software and hardware configuration and classical PID control algorithm, the coupling phenomenon of temperature and humidity exists in humidification condition and cooling and dehumidification condition, resulting in the deterioration of the dynamic response performance of the system. In this paper, the decoupling controller of each link is designed, and a split compensation algorithm is further proposed to eliminate the adverse effects caused by coupling. Matlab simulation results show that the design can greatly improve the dynamic response performance of temperature and humidity control.

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.

Temperature control of electric heating furnaces, a common piece of equipment in industrial production, is essential for assuring product quality and enhancing production effectiveness. In order to better understand the similarities and differences in temperature management between various types of electric heating furnaces, this paper first discusses the fundamental concepts and classifications of electric heating furnaces. Following that, it systematically describes the applications of the various temperature control techniques now used for electric heating furnaces, such as PID control, fuzzy logic control, genetic algorithm control, and model predictive control. This paper further analyzes the difficulties in controlling the temperature of electric heating furnaces and identifies potential future development trends in light of the issues that currently used control methods must deal with in practical applications, such as insufficient control accuracy, slow response speed, and poor stability. Finally, it summarizes the information in the entire paper and considers the direction of temperature control research for electric heating furnaces. This research will focus on new control theories and algorithms, furnace body design optimization, control system integration, and intelligent adaptive temperature control. In order to advance the development and advancement of technology in this area, the goal of this article is to provide a thorough theoretical reference and practical advice for the temperature management of electric heating furnaces.

As the working medium of hydraulic system, the temperature of hydraulic oil has a great influence on working performance of the machine. Taking the sampling robot as the research object, while in order to monitor and adjust the hydraulic oil temperature and solve the difficulty problem of uneven temperature distribution in oil tank caused by heat transfer hysteresis of hydraulic oil, automatic control system of coal sampling robot hydraulic system oil temperature of STM32 mcu is presented. The system with DS18B20 temperature sensors, which can realize the temperature real-time measurement of hydraulic system and the automatic control of oil temperature in hydraulic system of the robot has the characteristics of multi point real time data acquisition, strong anti-interference ability, simple and practical. Based on BP neural network multiple nonlinear fitting characteristics of oil temperature prediction, control air cooler speed and reduce energy consumption. Introduces the working principle and design scheme of the automatic control system of coal sampling robot oil temperature in hydraulic system, and expounds the design and development process.

The essay first sets forth a general design scheme about software and hardware circuits of intelligent electronic meters based on GPRS, then separately designs energy measurement chips, GPRS communication modules, power units and a flow chart of partial main programs in the systematic design scheme.