The use of temperature and humidity light three-parameter recorder is mainly used to determine the three important parameters in the environment, timely response is conducive to the rapid growth of plant growth needs to be adjusted, widely used in agricultural production. In addition, the instrument can also be applied to real-time evaluation of temperature and humidity comfort conditions on high-speed trains, providing reference for the comprehensive comfort evaluation of trains, for train designers to further optimize the train, and the temperature and humidity comfort in the greenhouse real-time adjustment.
When the temperature-humidity light three-parameter recorder system only reads and writes files, the reading speed reaches 6.74MB/s and the writing speed reaches 4MB/s, which fully meets the design requirements for data storage of the tester. At the same time, the SD card holder is soldered on the main board, and the SD card can be directly inserted and removed each time it is used, which is stable and reliable and very simple to use. In order to read the collected data in real time and prevent data discontinuity, the data collection thread has the highest priority.
The number of uncomfortable test samples measured by the temperature and humidity three-parameter recorder was 21, and the percentage in the entire data was 42.8%, while the proportion of uncomfortable matches was less than 50%. It can be seen that the temperature and humidity values ​​are at the level of 2 In the range of humidity. According to the comparison results, the temperature and humidity comfort test results fully meet the requirements. The data processing thread includes analysis and processing of temperature and humidity data and real-time storage of data. Because the temperature and humidity light three-parameter recorder is used in a high-speed motor vehicle, the electromagnetic interference is large. Therefore, the collected temperature and humidity data are first subjected to interference reduction pretreatment.
After the temperature and humidity light three-parameter recorder timer expires, the timer interrupt processing function will send an event signal to the data acquisition thread, the data acquisition thread reads the temperature and humidity sensor data through the I2C interface, and then stores the data in a certain order. In the buffer segment, until an entire buffer segment is filled, an event signal is sent to the data processing thread.
When the temperature-humidity light three-parameter recorder system only reads and writes files, the reading speed reaches 6.74MB/s and the writing speed reaches 4MB/s, which fully meets the design requirements for data storage of the tester. At the same time, the SD card holder is soldered on the main board, and the SD card can be directly inserted and removed each time it is used, which is stable and reliable and very simple to use. In order to read the collected data in real time and prevent data discontinuity, the data collection thread has the highest priority.
The number of uncomfortable test samples measured by the temperature and humidity three-parameter recorder was 21, and the percentage in the entire data was 42.8%, while the proportion of uncomfortable matches was less than 50%. It can be seen that the temperature and humidity values ​​are at the level of 2 In the range of humidity. According to the comparison results, the temperature and humidity comfort test results fully meet the requirements. The data processing thread includes analysis and processing of temperature and humidity data and real-time storage of data. Because the temperature and humidity light three-parameter recorder is used in a high-speed motor vehicle, the electromagnetic interference is large. Therefore, the collected temperature and humidity data are first subjected to interference reduction pretreatment.
After the temperature and humidity light three-parameter recorder timer expires, the timer interrupt processing function will send an event signal to the data acquisition thread, the data acquisition thread reads the temperature and humidity sensor data through the I2C interface, and then stores the data in a certain order. In the buffer segment, until an entire buffer segment is filled, an event signal is sent to the data processing thread.
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