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Fire alarm control system and control method thereof

A fire alarm and control system technology, applied to alarms, instruments, etc., can solve the problems of large number of multi-wire transmission lines, high total failure rate, and long alarm time

Active Publication Date: 2014-01-22
ZHEJIANG EIT ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to solve the problems of large number of multi-wire transmission lines in the prior art, high total failure rate, and long alarm time. The present invention adopts a self-developed digital non-polar two In the bus mode, without increasing the baud rate, it only takes 8ms to judge an alarm address. Even if there are 255 detection points uploading fire alarm information in the same inspection cycle, the fire alarm information can be reported simultaneously within 2 seconds. Fire alarm control system and control method thereof with greatly improved fire alarm response time

Method used

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  • Fire alarm control system and control method thereof

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Embodiment 1

[0073] The structure of the fire alarm control system of the present invention is as follows: figure 1 shown, which includes:

[0074] a host unit, the host unit sends an address pulse signal and a command pulse signal, receives a feedback signal, processes the signal and controls each unit;

[0075] The battery unit is connected with the host unit to supply power to the system;

[0076] The direct control unit is connected to the host unit and the field device respectively, and directly controls the field device according to the instructions of the host unit;

[0077] It also includes a loop unit that adopts a two-bus mode, and the loop unit includes a switch circuit, a pulse modulation circuit, a return code current circuit, an analog-to-digital converter, and a field device; the loop unit first sends an address pulse signal to the field device, and the field According to the actual situation, the device feedbacks the signal through the return code current circuit in the l...

Embodiment 2

[0084] On the basis of the fire alarm control system described in Embodiment 1, the loop unit further includes a pulse shaping circuit, which is connected to the switching circuit and the pulse modulation circuit, and outputs the command pulse signal and the address pulse signal to the Field equipment, the pulse shaping circuit can avoid the influence of capacitive load on the circuit of the two-bus structure, thereby improving the anti-interference performance of data communication; it also includes a short-circuit detection circuit, which is connected with the high-level line of the two-bus and the model The digital converters are respectively connected to detect the electrical signals of the two buses and input to the analog-to-digital converter; the short-circuit detection circuit is provided with a short-circuit indicating device, which indicates when a short-circuit occurs, and can respond to faults in a timely manner. In order to quickly solve line problems and avoid mis...

Embodiment 3

[0086] On the basis of the fire alarm control system described in the above embodiments, the loop unit, the direct control unit, and the host unit are connected through the CAN bus; the CAN bus has strong real-time performance, long transmission distance, strong anti-electromagnetic interference capability, and low cost Low, strong error detection ability, can work in high noise interference environment; with priority and arbitration functions, the fire alarm control system can realize the networking of multiple fire alarm control systems through the multi-unit network unit.

[0087] It also includes a linkage unit, which is also connected to the CAN bus. The start-stop key in the linkage unit can be associated with any one or a group of bus field devices by definition to complete the start-stop control of the bus field device. Modular structure design, and the number of control points can be flexibly configured according to project needs. The operation is simple and the config...

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Abstract

The invention relates to a fire alarm control system and a control method thereof. The fire alarm control system comprises a host unit, a battery unit, a direct control unit and a loop unit adopting a two-bus mode, wherein the loop unit comprises a switching circuit, a pulse modulation circuit, a return code current circuit, an analog-to-digital converter and field equipment. With the adoption of the fire alarm control system and the control method thereof, the problems that numerous multi-wire transmission lines exist and have high total failure rate and longer alarm time in the prior art are solved; and a digitized and non-polarized two-bus mode which is developed independently and integrates power supply, communication, control and alarm, so that the judgment for an alarming address only requires 8 ms on the premise that the baud rate is not increased, fire alarm information can be reported simultaneously in 2 seconds even through 255 detection points upload fire alarm information in the same polling period, and accordingly, the response time of fire alarm is shortened greatly.

Description

technical field [0001] The invention relates to an alarm control system, in particular to a fire alarm control system and a control method thereof, belonging to the technical field of fire protection. Background technique [0002] Fire is one of the common disasters, which causes huge losses. If it can be detected in time and dealt with as early as possible, the losses can be greatly reduced. Therefore, fire detection devices and alarm devices are set up for areas with potential fire risks. In the early stage of a fire or when a fire may form, after a suspicious signal is detected by the fire detection device, the alarm device will give an alarm prompt so that relevant personnel can handle it in time. Minimize losses as much as possible. [0003] After setting up many fire detection and alarm devices on site, in order to facilitate management and control, all fire alarm devices are connected to the control system through data communication to form a fire alarm control syste...

Claims

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Application Information

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IPC IPC(8): G08B25/08
Inventor 陶章亮谢海彬吴金海聂河东林素欧胡中祥周铭
Owner ZHEJIANG EIT ELECTRON
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