The Development of Operation Algorithm of Heat Detector with Variable Response Parameters

Kushnir, Andrii; Kopchak, Bohdan; Gavryliuk, Andrii

doi:10.1109/memstech49584.2020.9109436

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…The algorithm of operation of thermal fire detectors was proposed, which is based on measuring the minimum static temperature of the detector actuation, as well as the value of the temperature increase rate. That approach was verified in [10]. It should be noted that the general disadvantage of the cited works is that they do not consider the component of the triggering time of fire detectors, which is due to their dynamic properties.…”

Section: Literature Review and Problem Statementmentioning

confidence: 91%

Substantiating the pulse method for determining the time parameter of fire detectors with a thermoresistive sensing element

Abramov

Basmanov

Kozak

2021

EEJET

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This paper substantiates the pulse method for determining the time parameter for fire detectors with a thermoresistive sensing element ‒ the time constant. The method is based on using the Joule-Lenz effect, which manifests itself when an electric current pulse passes through the thermoresistive sensing element of fire detectors. Thermal processes in such a sensing element are described by a mathematical model that belongs to the class of equations of mathematical physics. The solution to the differential equation of this class was derived using the Hankel integral transformation and is represented as a series relative to the Bessel functions. The resulting solution is used to construct a mathematical model of a thermoresistive sensing element in the form of a transfer function, which takes the form of the transfer function of the inertial link. To trigger the thermoresistive sensing element of fire detectors, a single pulse of electric current in the shape of a rectangular triangle is used. The integral Laplace transformation was applied to mathematically describe the response of a thermoresistive sensing element to the thermal effect of such a test influence. To obtain information about the time parameter of fire detectors with a thermoresistive sensing element, the ratio of its output signals is used, which are measured in the a priori defined moments. A two-parametric expression was built to determine the time parameter of fire detectors; a verbal interpretation of the pulse method to determine it was provided. The implementation of this method ensures the invariance of the time parameter of fire detectors with a thermoresistive sensing element relative to the amplitude of a single pulse of an electric current, as well as relative to the parameter that is included in its transfer coefficient.

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Section: Literature Review and Problem Statementmentioning

confidence: 91%

Substantiating the pulse method for determining the time parameter of fire detectors with a thermoresistive sensing element

Abramov

Basmanov

Kozak

2021

EEJET

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“…The need to adjust the level of the threshold value of FD response at the software and hardware level was discussed in work [26]. It proposes an algorithm for the operation of HD, which changes the value of the minimal static response temperature and the rate of rise in the temperature at which it is enabled.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Operational algorithm for a heat detector used in motor vehicles

Kushnir¹,

Kopchak²,

Gavryliuk³

2021

EEJET

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In most cases, fixed temperature heat detectors are used to detect fire in vehicles. The response parameter of such detectors is constant. The time of fire detection by a fire detector, as well as the probability of its false operation, are affected by heat flux from an internal combustion engine. This paper reports the development and investigation of an operational algorithm of the fixed-dynamic heat detectors with variable response parameters. Depending on the temperature influence exerted by engine operation modes, a given algorithm automatically changes a value of the minimal static response temperature of a detector, as well as value of the rate of rise in the temperature of its response. The experimental results showed that in the initial period of engine operation, the temperature change rate in the engine compartment fluctuates and is the largest. It can exceed 290 °С/min. However, regardless of the type of vehicle and the type of engine, when the temperature reaches technological, the temperature change rate would vary within small limits, approximately 30÷50 °С/min. The study results from the Simulink software package (USA) in the MATLAB programming environment (USA) confirm the effectiveness of the programmed operational algorithm of a thermal fire detector. The developed algorithm of a fire detector's operation makes it possible to detect the fire at an early stage and reduce the cases of the device's false response. The fire detector responded to both the maximal and dynamic components. As regards the maximal component, the proposed detector is triggered about 2.3 times faster than the classic maximal thermal fire detector. Detection of fire at an early stage makes it possible to quickly use the fire extinguishing system

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Development of Heat Detector Based on Fuzzy Logic Using Arduino Board Microcontroller

Kushnir

Kopchak

Oksentyuk

2023

2023 17th International Conference on the Experience of Designing and Application of CAD Systems (CADSM)

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The Development of Operation Algorithm of Heat Detector with Variable Response Parameters

Cited by 4 publications

References 12 publications

Substantiating the pulse method for determining the time parameter of fire detectors with a thermoresistive sensing element

Substantiating the pulse method for determining the time parameter of fire detectors with a thermoresistive sensing element

Operational algorithm for a heat detector used in motor vehicles

Development of Heat Detector Based on Fuzzy Logic Using Arduino Board Microcontroller

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