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Evolution technologies and increasing consumption constrain us to think of reducing resource consumption. This cannot be achieved except through improvements of existing systems and the invention of new systems. One of these systems is also the induction heating. This system has revolutionized heating systems. If until now was using a simple electrical resistance heating, the new systems use induced...
This paper is focused on the development of a wireless device used in diagnosis and monitoring of sensors networks from civil structures like hydro-energetic buildings. Those constructions are monitored with sensors and measurement systems spread over the entire construction's body. The measurement systems are connected through a RS485 network. The entire structure forms a data acquisition system...
This scientific paper reveals an intelligent system for data acquisition for dam monitoring and diagnose. This system is built around the RS485 communication standard and uses its own communication protocol [2]. The aim of the system is to monitor all signal levels inside the communication bus, respectively to detect the out of action data loggers. The diagnose test extracts the following functional...
This paper is related to PSpice modelling of resistive transducers used in dam's management. In the hydro-energetic buildings, but especially in dam's monitoring, the resistive transducers used for building management have a complex structure. These transducers have one or two physical parameters that affect their behavior. First of all, the temperature is the most common parameter, but, for example,...
This paper presents a data acquisition system used for AC/DC current monitoring. The developed system use the current transducer manufactured by LEM [3]. The output signal of the transducer is a voltage that is proportional to the current magnitude. To compute the current, the outputs signal is sampled with high frequency. The AC rms (root mean square) value is obtained by processing the sample values...
In the dams monitoring procedure there are several important aspects that must be taken into consideration when the specialists must give a detail report regarding the construction behavior during the operation. One of the above physical phenomena that must be followed is the inclination of the concrete blocks during the freezing / unfreezing intervals or maximal / minimal loads (from the lake's water...
This paper is focused on measurement of the resistive transducers used in dam's monitoring process. The hydro-energetic buildings, like dams are equipped with a large type of resistive transducer. Some of the sensors are placed inside during the dam construction, but, sensors are also mounted later on. The dams are monitored with a large type of resistive transducers. The first generations contain...
Level measurement is the most important process which has to be followed in the dam's sensorial management department. Thus, the evaluation of the water seepage through the dam walls is becoming a first order parameter to be followed for the dam security monitoring. The level is measured before the weir boxes - where the water is collected via the existing drillings, into the special built gutters...
The proposed system wants to efficiently substitute the existing level sensors mounted in the dam wells based by its low cost and better precision. The system is been designed around a special designed capacitive sensor composed of eight independent copper pour areas distributed in mirror on from each other. The unknown variables of the resulted mathematical equations are the capacitances and the...
This paper makes a thermal study of a portable temperature measurement device under the influence of environment temperature. The portable device is used to measure sensors placed inside and outside of a hydro-energetic building (dams), where the ambient temperature range is between - 20degCdivide35degC. The self-heating phenomenon of electronics components cumulated with the ambient temperature increases...
Data converters are essential parts that enable communication between the external analog world and the digital devices. They should not compromise precision even though the hardware in which they are implemented relies on semiconductor devices known for their poor accuracy. Experimentation is essential to become fully acquainted with the converters performances. Theory is generally unable to quantitatively...
This article wants to reveal a new method to measure and moderate a vibrating wire transducer. Combining a complex measuring procedure that includes data acquisition and a MatLab application, it is possible to calculate the transducer's impedance. Furthermore, using higher frequencies (as the resonance frequency), respectively lower frequencies signals, the technique above evaluates correctly some...
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