Theoretical and Experimental Studies on Piezoelectric Thermal Fire Annunciator
Abstract
The paper presents theoretical and experimental studies on testing the possibility of using piezoelectric converters as a signaling device in fire protection systems. The advantage of this process is the absence of the necessity to connect electrical lines, which in most cases they themselves cause fire.
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Introduction
The systems, designed for remote registration of occurrence moment of fire situation at oil and gas industry facilities, contain a primary converter (located directly at the facility), a communication channel and a signaling device installed in the control room.
Practice shows that, the reliability of such systems is mainly determined by the primary converter, so that their design is presented by very stringent requirements. Therefore, currently, several types of devices have been developed reacting either to an increase in the ambient temperature caused by it [1,2,3]. The converters used in practice are mainly fusible and ferromagnetic fuses and photoelectric signaling devices.
Conclusion
The analysis of the available experimental data allows us to conclude that the duration of depolarization does not exceed 10 c. Thus, taking into account the thermal inertia, the total time required for triggering the signaling system from the occurrence moment of a fire situation does not exceed (10 ÷ 15) s.