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Processing of Information Obtained From Passing Vehicles

Więcławski K., Gontarz S.

Machine Dynamics Research

2018

Vol. 42, No. 2

93--103

The article discusses the design project of a speed bump enabling the monitoring of the vehicle chassis. The proposed analysis of the chassis will serve the purpose of reducing the threats connected with undesirable interference with in the vehicle’s structure. Additionally, it can allow for identiﬁcation of foreign objects located under the vehicle, in order to prevent their uncontrolled transfer into or from the protected zone. The duralumin housing with cameras and sensors installed, as well as the matrix of magnetic sensors mounted on the speed bump, make it possible to identify characteristic magnetic anomalies, enabling the comparison of the "map" of the distribution of the magnetic levels of speciﬁc vehicle at points representing various time spans. At the same time, magnetic sensors are capable of detecting magnetic objects mounted under the vehicle. The article presents the results of the selection and optimization of individual elements of the monitoring system, and their real operation. The application in the Labview environment ensures the registration and analysis of signals appropriate for the system. The entire detection process can be observed on an ongoing basis on the computer screen, and recordings of various time lapses can be digitally compared by means of processing of the obtained images. The used functions minimize threats connected with unauthorized use of vehicles entering the protected zone where particular safety measures are applied.

Test signal generation for service diagnosis based on local structural properties

Ungermann M., Lunze J., Schwarzmann D.

International Journal of Applied Mathematics and Computer Science

2012

Vol. 22, no. 1

55-65

The paper presents a new approach to the generation of test signals used in service diagnosis. The tests make it possible to isolate faults, which are isolable only if the system is brought into specific operating points. The basis for the test signal selection is a structure graph that represents the couplings among the external and internal signals of the system and the fault signals. Graph-theoretic methods are used to identify edges that disappear under certain operating conditions and prevent a fault from changing the system behavior at this operating point. These operating conditions are identified by validuals, which are indicators obtained during the graph-theoretic analysis. The test generation method is illustrated by a process engineering example.