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Fire alarm controller loop unit and control method thereof

A fire alarm and controller technology, applied in fire alarms, alarms, instruments, etc., can solve the problems of large number, long alarm time, and high total failure rate, and achieve long transmission distance, high signal amplitude, and low failure rate. Effect

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

AI Technical Summary

Problems solved by technology

[0006] 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 The bus mode, without increasing the baud rate, realizes that even if there are as many as hundreds of detection points uploading fire alarm information in the same inspection cycle, it can also be reported at the same time within 2.1 seconds, which greatly improves Fire Alarm Response Time

Method used

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  • Fire alarm controller loop unit and control method thereof
  • Fire alarm controller loop unit and control method thereof
  • Fire alarm controller loop unit and control method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] The fire alarm controller circuit unit of the present invention is as figure 1 Shown include:

[0050] The central controller sends address pulse signals and command pulse signals, and receives feedback digital signals;

[0051] The switch circuit is connected to the pulse signal output pin of the central controller through a reverse circuit, and connected to the high-level line of the second bus, sends address pulse signals to the field devices on the second bus, and provides working power;

[0052] The pulse modulation circuit is connected with the command pulse signal output pin of the central controller through the reverse circuit, and connected with the high level line of the second bus, and sends the command pulse signal to the field devices on the second bus;

[0053] The return code current circuit includes a high-end current mapping circuit, a low-end sampling circuit and an amplifying circuit. The high-end current mapping circuit is connected to the high-leve...

Embodiment 2

[0057] On the basis of the fire alarm controller loop unit described in Embodiment 1, a pulse shaping circuit is also included, which is connected with the switch circuit and the pulse modulation circuit, and outputs the command pulse signal and the address pulse signal to the scene after shaping, so The above-mentioned pulse shaping circuit can avoid the influence of the capacitive load on the circuit of the two-bus structure, thereby improving the anti-interference performance of the data communication.

Embodiment 3

[0059] On the basis of the fire alarm controller loop unit described in the above embodiments, it also includes a short circuit detection circuit, which is connected to the high level line of the two buses and the analog-to-digital converter respectively, and detects the electrical signals of the two buses and input to the ADC.

[0060] The short-circuit detection circuit is provided with a short-circuit indicating device, which can indicate when a short-circuit occurs, and can respond to faults in a timely manner, so as to quickly solve circuit problems and avoid missing fire reports due to faults not being maintained in time.

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Abstract

The invention relates to a fire alarm controller loop unit and a control method thereof. The fire alarm controller loop unit is characterized in that a central controller is used for sending an address pulse signal and a command pulse signal and receiving a feedback digital signal; a switching circuit is used for sending an address pulse signal to field equipment on two buses, and providing a working power supply; a pulse modulation circuit is used for sending a command pulse signal to the field equipment on the two buses; a return code current circuit comprises a high-end current mapping circuit, a low-end sampling circuit and an amplifying circuit, and the high-end current mapping circuit is connected with the amplifying circuit after connected with the low-end sampling circuit; and the amplifying circuit is connected with the central controller through an analog-digital converter. According to the control method of the loop unit, on the premise that a baud rate is not increased, fire alarm information can be simultaneously reported in 2.1 seconds even though hundreds of detection points upload fire alarm information in the same polling period, so that the response time of fire alarm is shortened greatly.

Description

technical field [0001] The invention relates to an alarm controller, in particular to a fire alarm controller circuit unit and a control method thereof, belonging to the technical field of fire protection. Background technique [0002] The fire alarm controller is the heart of the automatic fire alarm system. It can supply power to the detectors and has the following functions: 1) It is used to receive fire signals and activate fire alarm devices. The device can also be used to indicate the location of the fire and record relevant information. 2) The fire alarm signal can be activated through the fire alarm sending device or the automatic fire extinguishing equipment and fire linkage control equipment can be activated through the automatic fire extinguishing control device. 3) Automatically monitor the correct operation of the system and give sound and light alarms for specific faults. [0003] In order to reduce false alarms, facilitate installation and debugging, reduce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/00G08B25/00
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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