DEVICE FOR INVESTIGATION OF PHYSICAL-MECHANICAL CHARACTERISTICS OF SOIL LAYER Russian patent published in 2009 - IPC G01N33/24 

FIELD: agriculture.

SUBSTANCE: invention pertains to tests during engineering investigations in agriculture and tractor industry, in particular to test devices for investigation of physical-mechanical characteristics of soil level of moderate width, predominantly of median and low density. Device contains a frame consisting of a steel plate and stands connected with the plate by four arms. There are two guiding lines secured with the plate from above, with a moving there on sliding block with a support plate, accepting vertical load of the body weight and connected with the stamp through the hollow extender and thrust bearer. Stamp in the bottom part bears grip hooks, arranged equally along the circumference in radial direction closer to the edge of the stamp of the length of not more than half its radius. Axis of the stamp going through the hollow extender in its upper part has a mobile splint joint with a drum axially rotating against the steel plate due to the loaded grip hooks. Plunger pin preventing the drum and stamp axis from rotation prior to the onset of the experiment is brought off from meshing with the plate by means of a synchronising device of a position of vertical and shear loads toward the stamp, consisting of a shock clamp with a hammer head, capable of acceleration at turning by means of intorted spring upon plug displacement by means of thread connected with the bearing plate of the sliding block. Sensors of vertical and angular displacement of the stamp consists of two stretched threads, one whereof is connected with the drum, the other - with the bearing plate, and optical-fiber elements with two rollers, with threads in the form of clasping flexible loop spanned there through.

EFFECT: ensures improving test efficiency and precision of measurements and widens informative value of received results.

2 dwg