METHOD FOR DETERMINING ADHESION COEFFICIENT OF AIRFIELD COATING AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2015 - IPC G01N19/02 E01C23/07 

FIELD: measurement equipment.

SUBSTANCE: in the method for determining adhesion coefficient of airfield coating including measurement of the dynamic characteristics of the aircraft wheels during its movement over the airfield coating the master (front) and slave (rear) gear wheels, the slave (rear) wheel is formed by creation of the permanent dynamic braking of the gear wheel, the wheel without the dynamic braking is assumed as master wheel, at that the dynamic braking is formed using the brake system of the gear wheel, that can be disconnected during the aircraft run, speed of the master (front) and slave (rear) gear wheels is measured, relationship between difference of rotation of the master (front) and slave (rear) wheels and adhesion properties of the airfield coating is determined, and the adhesive properties of the airfield coating are determined as per the determined relationship after the aircraft run over it, and speed measurement of the master (front) and slave (rear) gear wheel. The device determining adhesive coefficient of the airfield coating contains front (master) 1 and rear (slave) 2 gear wheels of the aircraft, speed sensor 3 of the front (master) wheel, speed sensor 4 of the rear (slave) wheel, brake system 10 of the rear (slave) wheel, and estimation block 6 containing the first key 7, its input is connected with output of the speed sensor 3 of the front (master) wheel, and output - with input of right shift of shifting register 5, second key 8, its input is connected with output of the speed sensor 4 of the rear (slave) wheel, and output - with input of left shift of shifting register 5, third and large outputs of the shifting register 5 are connected with inputs of OR element 9, its output is output of the estimation block 6, control inputs of the first 7 and second 8 keys, and input of the brake system 10 of the rear (slave) wheel are connected with output of the load sensor.

EFFECT: method and device measuring of the adhesion coefficient directly on board the aircraft during its landing.

2 cl, 1 dwg