Abstract
The object of research is a laser rangefinder with a wireless sensor network interface protocol ZigBee, which in this study is proposed for the function of measuring the distance between objects. The main spheres of application are spheres where reliable information about the location of objects relative to each other is required. To increase the reliability, it is proposed to combine the possibility of measuring the distance between objects of sensor networks and data obtained from a laser rangefinder. These two methods are combined in one device. One of the most problematic places is the error of the measuring equipment. Also, for the objects described above, various obstacles are typical, like mechanical (trees, hills, lowlands), and radio interference. In the course of the research, the method of increasing the accuracy of measuring the distance of wireless sensor networks was used. To do this, they are combined with laser rangefinders, which are part of computerized distance measuring systems built on the basis of a combination of measurement methods of a different nature. Site localization studies were carried out for the average deviation value when ranking in 1 m (20 measurements), as well as on the progressive function of the required number of transactions. To calibrate the measured measurements, a minimum period of two-sided pass was calculated for the average value, when the receivers are in close proximity to one another (0.01 m). This average value on was calculated from each ranking measurements before converting to an immediate distance value. The results confirm an improvement in the efficiency of the ranking by averaging a plurality of samples to an error value of 6.0 m. The accuracy of the method was constant throughout the test propagation range (within a radius of 250 m).
Highlights
Inaccurate positioning of the object included in the wireless sensor networks leads to the generation of false information in a computerized system for measuring the distance between objects
One of the weaknesses of computerized systems for measuring mechanical quantities is jamming situation, which leads to a high probability of errors in measuring distance
The weak side of research is that there will be additional costs for the modernization of sensor devices related to the replacement of microcontrollers and/or their reprogramming for the method proposed in the work
Summary
Inaccurate positioning of the object included in the wireless sensor networks leads to the generation of false information in a computerized system for measuring the distance between objects. Such shortcoming, in turn, can lead, for example, to the untimely detection of a source of ignition. One of the weaknesses of computerized systems for measuring mechanical quantities is jamming situation, which leads to a high probability of errors in measuring distance. It is important to study new methods for measuring distance Those that combine measuring instruments that have different nature, and the comparison of the results of their measurement significantly reduces the probability of error
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