Distributed monitoring method

A distributed monitoring and controller technology, applied in the direction of program control, computer control, general control system, etc., can solve the problems of high energy consumption of the alarm probe system and unsuitable alarm probes, etc.

Active Publication Date: 2007-04-04
BEIJING SIEMENS CERBERUS ELECTRONICS
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Problems solved by technology

Therefore, the prior art alarm system using this type of communication protocol is not suitable for alarm probes with more loads, otherwise the problem of alarm delay will occur
[0005] On the other hand, even if many alarm probes in the prior art do not send an alarm signal to the central controller, they are always in an active state that can report to the controller at any time, so the energy consumption of the alarm probe and even the entire system is relatively high.

Method used

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[0055] Fig. 1 shows an example of a monitoring system applying the method of the present invention. The monitoring system shown in FIG. 1 has a controller and 255 field devices (numbers 1, 2, 3, . . . , 255), and all the field devices here are smoke detectors of a certain type. These field devices are connected in parallel with each other and form a loop with the controller. Typically, when there are no unusual events such as fireworks, the controller will access each field device individually. In each signal frame, the controller knows a certain parameter of a field device. If no abnormal event is detected by all the smoke detectors, usually after 255*n signal frames (n is the number of sub-addresses accessed in each field device, which can be flexibly adjusted according to the situation), the controller completes One tour of all parameters of all field devices. Then, start the next round of inspection.

[0056] In a certain signal frame, if a certain field device detects...

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Abstract

A monitor system which is available for safety secure, fire alarm, transformer substation or mobile communication station is composed be a controller and at least two devices in situ. The controller and the devices in situ are connected by a communication cable for data transmission like device address, sub-address, read-write mark, communication data between the controller and the devices, requirement from devices to controller. In case abnormal event occurs, the device in situ sends requirement to the controller.

Description

1. Technical field [0001] The invention relates to a method for monitoring the environment state; more specifically, it relates to a distributed monitoring method for monitoring the environment state. 2. Background technology [0002] One type of prior art smoke and fire alarm system includes a plurality of alarm detectors and a controller. The controller communicates with the field devices through a field bus. Usually, this kind of communication mainly adopts the following two types of communication protocols. [0003] The alarm signal of the first type of communication protocol is driven by the occurrence of an event such as pyrotechnics. Based on this type of protocol, when the system is working, both the controller and the alarm probe are usually active. Once one or some of the alarm probes perceive a smoke event, the alarm probes will send an alarm to the controller. The advantage of this type of communication protocol is that each alarm probe is independent and can...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B25/00G05B19/048G05B19/406
CPCH04L12/2602H04L41/0609H04L43/00H04L43/0817
Inventor 马丁·迈纳
Owner BEIJING SIEMENS CERBERUS ELECTRONICS
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