| 摘要 |
A device for measurement of soil hardness comprises a body with base, reversing electric motor with reducer, threaded beam, slider, tensiometric sensor, rod, plunger, ruler with notches, optoelectronic couple, electronic indication block, at that the rod with the plunger is equipped with ruler with notches arranged uniformly in whole length of the ruler, along those optoelectronic couple moves, this performs function of switch on for setting a signal from tensiometric sensor to electronic indication block and then to permanent memory at each given level of topsoil. |
