Multi-parameter temperature measuring type electric fire monitoring system

Abstract

The invention discloses a multi-parameter temperature measuring type electric fire monitoring system comprising electric fire monitoring equipment, monitoring detectors and temperature sensors. The monitoring detectors receive temperature signals collected by the temperature sensors and process the signals. The electric fire monitoring equipment and the monitoring detectors carry out bidirectional communication. The electric fire monitoring equipment sends an inspection signal to the monitoring detector and receives response information of the monitoring detectors. The types of the temperature sensors can be any one or any combination of a point contact type, a line contact type and a non-contact type; and the temperature sensors can be arranged in an enclosed electrical system. According to the invention, the system is integrated with semiconductor, linear, and infrared temperature sensors and various temperature measuring ways with different mechanisms are realized. On the basis of the multi-parameter measuring way, early-stage electrical fire response capability and alarm accuracy of the temperature measuring type electric fire monitoring detector are improved substantially; the non-contact measuring and mounting ways are realized; and the high-interference can be avoided effectively.

Description

technical field [0001] The invention relates to an electrical fire monitoring system in the discipline of safety engineering, in particular to a multi-parameter temperature measuring electrical fire monitoring system. Background technique [0002] The electrical fire monitoring system belongs to the fire pre-alarm system and is one of many fire prevention methods. When electrical equipment has gradual electrical faults such as overcurrent and poor contact, the temperature of cable joints, terminal blocks and other parts will rise. When the temperature rises to a certain level, the surrounding combustible materials may be ignited, causing electrical fires. Installing an electrical fire monitoring system can effectively curb the occurrence of electrical fire accidents and ensure the safety of national property and people's lives and properties. Installing temperature-measuring electrical fire monitoring detectors in weak parts such as cable joints and terminal blocks can effe...

AI Technical Summary

Problems solved by technology

In the current engineering application of temperature-measuring electrical fire monitoring detectors, the commonly used temperature-measuring sensors are mainly semiconductor temperature sensors (thermistors) and linear temperature sensors. The main problems are as follows: First, the temperature-measuring sensor Low sensitivity, limited protection range

At present, the temperature sensors used in temperature-measuring electrical fire monitoring detectors mainly use semiconductor temperature sensors. In order to ensure the detection effect of the temperature-measuring sensor and realize early warning, the engineering installation usually adopts a contact arrangement, and the temperature-measuring sensor is fixed on the ground. Detect the surface of the object, which has a good protective effect on the medium and low voltage power distribution cabinets; but because the installation process is a wired connection, in the power distribution equipment and power distribution cabinets with many terminals, it cannot be laid in a large area due to the difficulty of wiring

However, local laying cannot realize comprehensive abnormal temperature monitoring, so it has certain limitations, which is not conducive to engineering maintenance and repair

At the same time, in the high-voltage cabinet, in addition to the above-mentioned problem that it cannot be laid in a large area, due to the high requirements for insulation, the use of temperature measuring sensors has also brought certain limitations.

Second, because most of the application places are high-voltage places, coupled with contact installation, the temperature sensor is susceptible to high-voltage interference, resulting in unstable work

The third is limited by the structure and detection mechanism. The temperature sensor is a single parameter measurement, and the protection range of a temperature sensor is limited, so the protection range of the temperature sensor is limited. For example, the semiconductor temperature sensor adopts point contact temperature measurement, and the wire The type temperature sensor adopts line contact temperature measurement. For the detection of multi-channel incoming and outgoing lines of the power distribution cabinet, it is necessary to use a temperature sensor protection method for one incoming or outgoing line. This method increases the cost of engineering equipment. , reducing the cost performance of engineering applications

Although this technology avoids the defect of single-parameter detection, its problem is that the system is complex and needs to solve the preprocessing of multi-channel signals, which will inevitably affect the response speed of the control system and the measurement accuracy will also be affected

Moreover, compared with smoke, humidity and other information, the detection of temperature has greater value for the prevention of electrical fires. Therefore, this technology that integrates multiple parameters such as smoke and humidity has the disadvantage of not being very practical.

[0006] To sum up, due to the existence of the above problems, the application scope of the temperature measuring electrical fire monitoring detector is greatly limited, and the early response ability of the electrical fire monitoring detector is affected.

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