Schematic of soil freezing and thawing sensor [41].

• Main Authors: Chaoyi Zhang (11741983), Feng Chen (25347), Lei Sun (45752), Zhangchao Ma (11741986), Yan Yao (229656)
• Format: Still Image
• Language: unknown
• Published: 2021
• Subjects: Biophysics; Ecology; Environmental Sciences not elsewhere classified; Biological Sciences not elsewhere classified; Mathematical Sciences not elsewhere classified; Chemical Sciences not elsewhere classified; single spherical radius; original spatial three; heat flow motion; experiments also demonstrate; analysis results show; variable coordinate system; linked equations form; heat transport equation; numerical simulation results; numerical simulation algorithm; maximum relative error; mathematical model based; thaw soil sensor; studying seasonal freeze; permafrost moisture content; thaw soil; seasonal freeze; permafrost moisture; independent variable; coupled equation; basic equations; soil temperature; permafrost water; minimum error; homemade freeze; average error; xlink ">; points using; parallel hexahedron; model reduces; measured data; matching states; humidity values; greatly reduced; different times; permafrost
• Online Access: https://doi.org/10.1371/journal.pone.0258861.g006

H. Spacing of sensor probe (The shortest distance was 10cm) 1. Communication interface of power supply and RS485 2. SD card storage module 3. Sensor collecting mainboard 4. Bottomed cable connector 5. PVC support frame 6. Connecting cables 7. Temperature sensor board 8. Moisture and temperature mainboard connector 9. Copper detection probe 10.PVC tube.