DEVICE DETERMINING CURVATURE AND GRADIENTS OF SURFACE PROFILE OF ROADWAY COVERING IN TWO DIFFERENT DIRECTIONS, PREDOMINANTLY, IN DIRECTION OF AUTOMOBILE TRAVEL AND IN DIRECTION TRANSVERSE TO IT Russian patent published in 1998 - IPC

FIELD: determination of profile of roadway covering for road construction. SUBSTANCE: proposed device includes measurement- calculation complex, transducers of linear velocity of automobile travel, of covered distance, of time of travel, of angular velocity or course, aids determining automobile accelerations and power supply system. Aids determining accelerations are made in the form of two accelerometers positioned in two mutually perpendicular directions, sensitivity axis of one of them being located along direction of travel of automobile and sensitivity axis of the other one being arranged transverse to direction of travel of automobile, two adders installed across output of each accelerometers, two low-pass filters mounted across outputs of proper adders. Input of adder in circuit of accelerometer having longitudinal sensitivity axis is coupled through inverter and differentiator to transducers of linear velocity of travel of automobile, input of adder in circuit of accelerometer having sensitivity axis transverse to direction of travel of automobile is coupled to output of multiplier which input is connected to transducer of linear velocity of travel of automobile and to course differentiator or transducer of angular velocity of turn of automobile. Outputs of adders are coupled to low-pass filters. EFFECT: input of correction to process of determination of parameters of profile of roadway covering depending on change of length of circumference of automobile wheel due to change of its operational conditions in specified spell of time and distance covered. 3 cl, 1 dwg