Raspberry Pi based automatic temperature measurement and logging system for solar thermal purposes

For automatic temperature measuring and logging purposes in solar thermal experiments, a single board computer - Raspberry Pi based and sensor system is proposed. Different data sets are observed for sensors, thermometers, and thermocouples and they are compared. The consistency of the automated temperature measurement system is also verified.

A six level automatic soil temperature measuring system

An automatic soil temperature measuring equipment is developed using four terminal thermistors. The output voltages from the six levels, i.e., 10 cm above soil surface, soil surface and 10 cm, 20 cm, 30 cm and 60 cm below the soil surface, are amplified and their multiplexed output is recorded on a chart recorder. The equipment is tested in the field and continuous observations are taken during May 1991. Temperature profiles for different hours of the day are plotted and diurnal variations of all levels are also discussed. An attempt is made to evaluate the damping depth and thence the thermal conductivity and soil heat flux.

Operation analysis of C3-MR process cold box by grey system theory

In this paper, the problems of high refrigerant line differential pressure and uneven distribution of cold energy in cold box regulation under C3-MR process are studied. Five reasons are predicted by engineering performance. Using gas chromatography experiment and grey system pure mathematics analysis, it is determined that the main causes of the problem are unreasonable distribution ratio of each group of mixed refrigerants and disordered latent heat of vaporization of refrigerants. Furthermore, the grey system model is used to study: 1. grey relation analysis model shows that the correlation degree of T3 temperature measuring point is 0.8552, which is the only main factor. The abnormal working condition is determined by the project to be caused by incorrect proportion of N2 components. 2. According to GM(1,N) model, the driving term of T3 temperature measuring point is 3.8304, which needs to be supplemented with N2 component to eliminate the problem. 3. After adding N2 to 10% (mol component), abnormal working conditions disappeared. The GM(1,N) model is used again to verify that the difference of driving results is small, the average relative error is 24.91%, and the accuracy of the model is in compliance.

Identifying ecotourism attractions in Ubajara National Park (Ceará State) through remote sensing

Tourism is among activities growing faster worldwide. Although it is a major global economic driver, it also largely contributes to environmental impacts. Therefore, ecotourism arose as an alternative to enjoy natural beauty without severely damaging nature. The aim of the present study was to identify the ecotourism attractions of Ubajara National Park (Ceará State) through Remote Sensing. This method involved land cover mapping and land-surface temperature measuring in order to detect both ongoing and potential activities. Ecotourism allows tourists to be closer to nature and widen their perspective on it. Such benefits can be seized by Ubajara National Park visitors through ecological trails and visits to the local cave, so they can come to understand the importance of conservation for maintaining the natural beauty of the Park. Flora and temperature in the Park’s highland areas are different from those of its neighborhood; this difference creates a landscape different from that of most Ceará State regions, and it makes this park a suitable place for the development of birdwatching tourism.

Analysis of the Downhole Measurement System’s Pressure and Temperature Measuring Channel Calibration Errors

Various measurements in wells are quite challenging due to the specific measurement conditions. There are some additional requirements for measurement systems, in particular, space restrictions. Therefore, measuring several parameters with a single sensor is rather important. The paper discusses a measurement system that allows measuring temperature and pressure with a single sensor – an SOS-based strain gauge pressure transducer with a bridge or half-bridge circuit. In this case, pressure and temperature measuring channels are calibrated individually, which creates another error component. The numerical simulation of calibration described herein shows that regardless of the sensor circuit, the voltage uncertainty band of both measuring channels is characterized by a reduced error of 0.03 % with a confidence probability P = 0.9.

The DESIGN AND BUILD OF A ROCKET STATIC THRUST TEST BASED ON A RASPBERRY PI 4.0

A flying vehicle, or guided missile that gets a boost or a rapid reaction to the propellant material from the engine output is called a rocket. The Indonesian Army really needs measuring tools to determine the ability of a rocket to be made. Therefore, in this study the author will design a temperature measuring device, thrust, and temperature on a rocket with a rocket load of 1 ton. The research method used is pure experiment. This study aims to find data on temperature, thrust, and temperature on the rocket in order to find out the specifications needed so that the rocket can fly as desired. The resulting data will later be sent to the raspberry pi to be processed in order to get the results which will later be printed on paper that will be used for a research on making rockets to help the Indonesian Army in developing defense equipment in the rocket field.

Design and Implementation of Multiband Noncontact Temperature-Measuring Microwave Radiometer

In this paper, a multiband noncontact temperature-measuring microwave radiometer system is developed. The system can passively receive the microwave signal of the core temperature field of the human body without removing the clothes of the measured person. In order to accurately measure the actual temperature of multilayer tissue in human core temperature field, four frequency bands of 4–6 GHz, 8–12 GHz, 12–16 GHz, and 14–18 GHz were selected for multifrequency design according to the internal tissue depth model of human body and the relationship between skin depth and electromagnetic frequency. Used to measure the actual temperature of human epidermis, dermis, and subcutaneous tissue, a small and highly directional multiband angular horn antenna was designed for the radiometer front end. After the error analysis of the full-power microwave radiometer, a novel hardware architecture of the microwave interferometric temperature-measuring radiometer is proposed, and it is proven that the novel interferometric microwave radiometer has less error uncertainty through theoretical deduction. The experimental results show that the maximum detection sensitivity of the novel interferometric microwave temperature-measuring radiometer is 215 mV/dBm, and the temperature sensitivity is 0.047 K/mV. Compared with the scheme of the full-power radiometer, the detection sensitivity is increased 7.45-fold, and the temperature sensitivity is increased 13.89-fold.