Full text: Papers for the international symposium Commission VI

the fact, that for two years all prototypes of 
cranes have been examined by photogrammetric methods 
and at the present moment the measurements are carried 
out by the Photogrametric Laboratory of the Enterprise 
of Geodesy. The guickness and simultaneity registra 
tion of entire process and the possibility of 
determination of the numerical model with an arbitra 
rily large number points and arbitrary location of 
points are the main advantage of photogrammetry rela 
tive to other methods. 
2*5* The measurement of technical and natural processes 
This category of applications is characterized by 
dynamical registration of phenomena. The qualitive and 
guantitative information about the processes serves on 
the one hand the cognitive purpose on the other provides 
the prognosis of natural processes. The applications of 
this type may be divided into two groups. The first is 
represented by the measurement of speedy processes. The 
classical examples are the photogrammetric measurement of 
the displacements and strains of an aluminium circular 
membrane in the process of explosive forming /8/ and the 
determination of the process of shooting off of stones 
in a stonepit. The explosive duration was about 3 x 10"”^ 
sec, the displacement rate 20 m/sec and the strain rate 
about 100 sec .The accuracy of the measurement of the 
change in the shape of a circular membrane during the 
process of explosive forming in relation to the theoretical 
shape is ca - 0.3 mm. The result allowed to formulate the 
theoretical description of the process. 
The utilization of photogrammetry in the measurement • 
of the process of shooting off stones in a stonepit 
X^ermits to establish the limits of the danger - zone 
with the accuracy of several dozen cm. The photographs 
were obtained by two film cameras and the location of 
the stones was imaged on the consecutive frames of 
the film. In result of the measurement the vectors of
	        
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