Apparatus and method for controlling the frequency of vibration of a compacting machine.

摘要

An apparatus (400) and a method are provided for controlling the frequency of vibration of a compacting machine (100). The frequency control is carried out by the apparatus (400) which determines the actual time at which a ground contacting member (102) of the compacting machine (100) is at its true vertically lowest position. This is determined by measuring the time at which the vertical acceleration of the ground contacting member (102) has a maximum value during one rotation of an eccentrically mounted, vibration inducing mass (206). The time difference between the time at which the vibration inducing eccentric mass (206) is at a predetermined position and the time at which the acceleration of the ground contacting member (102) is at the maximum value is used to calculate a phase angle relationship ( phi ) between the ground contacting member (102) and the eccentrically attached member (206). This method of determining the phase angle relationship ( phi ) between the two members (102,206) provides an accurate parameter for controlling the frequency of vibration imparted to a compactible material (10) by the compacting machine (100). <IMAGE>