توسعه، آزمون آزمایشگاهی و مزرعه‌ای یک حسگر بولینگ برای اندازه‌گیری تنش در خاک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه شهرکرد

2 دانشگاه صنعتی اصفهان

چکیده

در این مطالعه یک نمونه حسگر بولینگ استوانه­ای برای اندازه­گیری تنش در خاک تحت عبور تایر ساخته و آزمون شد. این حسگر متشکل از یک هد لاستیکی برای حس کردن تنش در خاک، لوله PVC برای انتقال فشار، حسگر دیجیتال فشار و یک سرنگ جهت اعمال فشار داخلی اولیه می­باشد. با آزمون آزمایشگاهی حسگر در مخزن تحت فشار هوا در چهار سطح ۲۵، ۵۰، ۷۵ وkPa  ۱۰۰ رابطه بین فشار هوای درون مخزن و فشار حسگر بولینگ مورد بررسی قرار گرفت که روابطی کاملاً خطی نشان داد. همچنین در چهار سطح فشار داخلی اولیه، اختلاف فشار حسگر بولینگ و فشار داخلی اولیه با فشار هوای داخل مخزن تناظر یک به یک با حدی (کمتر از 5%) از انحراف را نشان داد. آزمون مزرعه­ای سه حسگر بولینگ نصب شده در عمق­های 15، 30 وcm  45 تحت عبور تایر تراکتور و کمباین تغییرات تنش با عمق را به خوبی نشان داد. 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Development, Laboratory and Field Testings of a Bolling Probe for Measuring Stress in Soil

نویسندگان [English]

  • Mojtaba Naderi Beldaji 1
  • Ali Kazemzadeh 1
  • Abbas Hemmat 2
  • Sajjad Rostami 1
چکیده [English]

In this study, a cylindrical Bolling probe was developed and evaluated for measuring stress in soil under tire traffic. The probe consists of a silicon rubber head for sensing the soil stress, a PVC tube for transferring the liquid pressure, a digital pressure sensor and a syringe for filling the probe with water and adjusting the initial inclusion pressure. A tank with pressurized air was used for laboratory testing of the probe. The probe head was put into the tank and with sealing the slits, the probe was tested at four initial inclusion pressures of 25, 50, 75 and 100 kPa. The relationship between Bolling and air pressures was investigated. The results showed perfectly linear relationships between the air and Bolling pressures at different initial inclusion pressures. The difference between the Bolling pressure and initial inclusion pressure versus air pressure slightly (<5%) deviated from 1:1 line. Field testing of three Bolling probes at 15, 30 and 45 cm depth in wheeling experiments with tractor and combine harvester showed a satisfactory measurement of stress variations with depth.

کلیدواژه‌ها [English]

  • traffic
  • tire
  • Stress
  • Soil compaction
  • Bolling probe
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