KR20160060946A - Wireless network fire sensing system and method thereof - Google Patents
Wireless network fire sensing system and method thereof Download PDFInfo
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- KR20160060946A KR20160060946A KR1020140163187A KR20140163187A KR20160060946A KR 20160060946 A KR20160060946 A KR 20160060946A KR 1020140163187 A KR1020140163187 A KR 1020140163187A KR 20140163187 A KR20140163187 A KR 20140163187A KR 20160060946 A KR20160060946 A KR 20160060946A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/005—Fire alarms; Alarms responsive to explosion for forest fires, e.g. detecting fires spread over a large or outdoors area
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
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- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A wireless network fire detection system and method of operation thereof are disclosed. A method of operating a wireless network fire detection system including a master device and at least one slave device according to an embodiment of the present invention includes the steps of (a) receiving, at the slave device, a reference packet every predetermined reference packet arrival time from the master device (B) transmitting, in the slave device, a monitoring packet (TXS) synchronized based on the reference packet (RXM) and in a set time slot interval (a1); (c) Operating in a sleep mode until the reference packet arrival time (TM) elapses after transmitting the monitoring packet (TXs) to the master device; and (d) operating in a sleep mode from the slave device Determining whether a fire has occurred based on the monitoring packet RXs, and operating in a sleep mode when receiving the monitoring packet . Wherein the reference packet arrival time is set in the next reference packet in the master device by setting the variation information of the reference packet arrival time detected based on the reception result of the monitoring packet in the next reference packet.
Description
The present invention relates to a fire detection system, and more particularly, to a fire detection system using wireless networking.
A smoke detector or a heat detector may be mounted on the ceiling of a room, and a wired fire detector may be used to operate the smoke detector or the heat detector to sound a fire alarm. The slave devices such as the detectors and the master device which receives the detection result from the slave device and judges whether or not a fire is generated and generates an alarm is connected by wire, so that a wire ratio is considerably required depending on the distance. Also, since the DC current supply and signal transmission must be performed simultaneously between the slave device and the master device, thick copper lines must be used, and these leads must be routed to the ceiling and the like, which increases the installation cost.
On the other hand, in the case of using a wireless network fire detection system consisting of a slave device operating by using its own battery and a master device transmitting and receiving signals wirelessly from the slave device, the A / S cost is increased can do.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless network fire detection system and a method thereof for reducing battery power consumption and communication efficiency using an ultra low power wireless communication algorithm.
According to another aspect of the present invention, there is provided a method of operating a wireless network fire detection system including a master device and at least one slave device, the method comprising the steps of: (a) Receiving a reference packet for each reference packet arrival time, (b) synchronizing based on the reference packet in the slave device, and transmitting a monitoring packet in a set time slot interval, (c) Operating in a sleep mode until the reference packet arrival time (TM) elapses after the transmission of the monitoring packet to the master device; and (d) in the master device, based on the monitoring packet received from the slave device Determines whether or not a fire has occurred, and when the reception of the monitoring packet is completed, The method comprising the steps of:
The reference packet arrival time is set in the next reference packet by the master device, and the variation information of the reference packet arrival time detected based on the reception result of the monitoring packet.
According to another aspect of the present invention, there is provided a master device in a wireless network fire detection system, comprising: an RF transceiver for transmitting and receiving a reference packet and a monitoring packet including at least one slave device and time slot section information; A timer for generating a timer interrupt every time a reference packet arrival time (TM) elapses from a time point at which the reference packet is transmitted; a monitoring packet receiving unit for receiving a monitoring packet from the slave device in the time slot period, The MCU operates in a sleep mode when reception is completed, and when the time interruption occurs, it switches from the sleep mode to the active mode and transmits a next reference packet.
The MCU reflects the fluctuation information of the reference packet arrival time detected based on the reception result of the monitoring packet in the next reference packet.
According to another aspect of the present invention, there is provided a slave device in a wireless network fire detection system, comprising: a sensor module for monitoring occurrence of a fire; a base station for receiving a reference packet from a master device, An MCU for generating the monitoring packet based on sensing results of the sensor module, being synchronized with the reference packet and detecting the time slot period from the reference packet, an active mode A clock module for supplying a high frequency operation clock to the MCU, a sleep module for supplying a low frequency operation clock to the MCU, and a battery for supplying operation power to the MCU and the RF transceiver according to the operation clock.
When the transmission of the monitoring packet is completed, the MCU enters the sleep mode, and when the reference packet arrival time detected from the reference packet elapses, the MCU enters the active mode and controls to receive the next reference packet from the master device.
According to the wireless network fire detection system and method according to embodiments of the present invention, only the predicted packet arrival time between the slave device and the master device operates in the active mode, and operates in the sleep mode until the next packet arrives after receiving the packet Battery power consumption can be reduced, and accurate communication can be achieved.
1 is a conceptual diagram of a wireless network fire detection system according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram illustrating a tree network including the wireless network fire detection system of FIG. 1. FIG.
3 is a block diagram specifically showing the master device shown in FIG.
FIG. 4 is a block diagram specifically showing the slave device shown in FIG. 1. FIG.
5 is a block diagram showing another embodiment of the slave device of FIG.
6 is a timing diagram illustrating a packet transmission / reception operation between a master device and one slave device according to an embodiment of the present invention.
7 is a timing diagram illustrating a packet transmission / reception operation between a master device and a plurality of slave devices according to another embodiment of the present invention.
8 is a conceptual diagram illustrating a reference packet according to embodiments of the present invention.
9 is a flowchart illustrating an operation of a slave device according to an embodiment of the present invention.
10 is a flowchart illustrating an operation of a master device according to an embodiment of the present invention.
11 is a flowchart illustrating an operation of a master device according to another embodiment of the present invention.
It is to be understood that the specific structural or functional descriptions of embodiments of the present invention disclosed herein are only for the purpose of illustrating embodiments of the inventive concept, But may be embodied in many different forms and is not limited to the embodiments set forth herein.
Embodiments in accordance with the concepts of the present invention are capable of various modifications and may take various forms, so that the embodiments are illustrated in the drawings and described in detail herein. It should be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms disclosed, but includes all modifications, equivalents, or alternatives falling within the spirit and scope of the invention.
The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are intended to distinguish one element from another, for example, without departing from the scope of the invention in accordance with the concepts of the present invention, the first element may be termed the second element, The second component may also be referred to as a first component.
It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.
Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings.
1 is a conceptual diagram of a wireless network fire detection system according to an embodiment of the present invention.
Referring to FIG. 1, a wireless network
The
The
The
The
The
FIG. 2 is a conceptual diagram illustrating a tree network including the wireless network fire detection system of FIG. 1. FIG.
Referring to FIG. 2, the wireless network
The tree network fire detection system (2) includes an upper master device (30) and a plurality of star network systems (1).
Each of the slave devices can communicate only with the
When at least one of the
The lower master device 10-1 may be connected to another lower master device 1-k via a wireless network, and may exchange information from the
The plurality of lower master devices 10-1 to 10-M are connected to the
The
3 is a block diagram specifically showing the master device shown in FIG.
3, the
The
The
The
The
The
The
The
FIG. 4 is a block diagram specifically showing the slave device shown in FIG. 1. FIG.
4, the
For example, the sensor may include a smoke /
The slave MCU (201) controls the overall operation of the slave device (20). The
The
The timer 205 counts time in the
5 is a block diagram showing another embodiment of the slave device of FIG. For convenience of explanation, the sensor in the configuration of FIG. 4 will be described in more detail.
4 and 5, the sensor may include various kinds of sensors. For example, the smoke /
The heat sensing sensor 212 'measures the temperature of the ambient atmosphere in real time and notifies the control device 201'.
The control device 201 'interlocks the sensing result of the thermal sensor 212' and the IR light sensor 215 to determine whether a fire has occurred. More specifically, even if the controller 201 'determines that smoke has been generated from the IR light detector 215, it determines that the fire does not occur unless the measured temperature from the heat sensor 212' suddenly changes. As a result, an alarm error of the smoke /
6 is a timing diagram illustrating a packet transmission / reception operation between a master device and one slave device according to an embodiment of the present invention.
Referring to
The
The
The
The
After receiving the monitoring packet, the
When the next reference packet arrival time TM elapses, the
7 is a timing diagram illustrating a packet transmission / reception operation between a master device and a plurality of slave devices according to another embodiment of the present invention. 6 for convenience of explanation, communication between the
Referring to FIG. 7, the
Each of the slave devices receives the reference packet (RX), sets the network ID, and transmits the monitoring packet in the corresponding time slot period (TX1 to TXN). The
The
Each of the
As a result, the
Since the
8 is a conceptual diagram illustrating a reference packet according to embodiments of the present invention.
6 to 8, the reference packet includes a preamble, a syncword, a variation (a) of reference packet arrival time, a time slot information, a payload and an error check code (ECC) The reference packet is implemented to ensure a sufficient data transmission rate.
The sync word is a slave device which is distinguished from a slave device that is dependent on the second master device 10-2_ and receives only a monitoring packet of a slave device whose sync word is the same For example, the sink word may be an identification number of 32 bits.
In the initial stage, the
The
The payload may include the result of sensing in the
The error check code (ECC) is a code for preventing an error that can occur when the monitoring packet is transmitted to the
9 is a flowchart illustrating an operation of a slave device according to an embodiment of the present invention.
Referring to FIGS. 6 and 9, the
The
The
The timer 205 generates a timer interrupt (S17) when the finely adjusted reference packet arrival time TM 'elapses (S16), and the
10 is a flowchart illustrating an operation of a master device according to an embodiment of the present invention.
6 and 10, the
The
When the
The
11 is a flowchart illustrating an operation of a master device according to another embodiment of the present invention.
Referring to FIG. 11, the
When receiving the monitoring packet RXs from the
If the
When the sink word reception counter is smaller than 2, that is, in the initial state, the
On the other hand, when the sink word reception counter is 2 or more (S44), the
The
The
The
That is, the
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.
1,2: Wireless network fire detection system
10: Master devices 20-1 to 20-N: Slave devices
30: super master device 41: Internet server
42: mobile device 50: remote central processing unit
101: master MCU 102: master RF transceiver
103: Clock module 104: Battery
105: timer 106: display device
107: buzzer 108: switch
201:
203: clock module 204: battery
205: Timer 211: Smoke / flame detection sensor
212, 212 ': heat sensor 213: gas leak sensor
214: Infrared LED 215: IR light detector
Claims (10)
(a) receiving, in the slave device, a reference packet (RXM) every predetermined reference packet arrival time (TM) from the master device;
(b) in the slave device, synchronizing based on the reference packet RXM and transmitting a monitoring packet TXS in a set time slot a1;
(c) operating the slave device in a sleep mode until the reference packet arrival time (TM) elapses after transmitting the monitoring packet (TXs) to the master device; And
(d) determining whether a fire has occurred on the basis of the monitoring packet (RXs) received from the slave device in the master device, and operating in a sleep mode when receiving the monitoring packet is completed,
The reference packet arrival time is
Wherein the master device sets the change information of the reference packet arrival time detected based on the reception result of the monitoring packet in the next reference packet.
Incrementing a sink word receive counter if the sync word of the monitoring packet is the same;
Comparing the time variation of the current timer, which is reset in proportion to the operating voltage reduction amount of the master device, to the previous timer time variation when the sink word reception counter is 2 or more; And
Setting the current timer time to a value obtained by subtracting the variation information based on the comparison result and the difference between the current timer time variation and the target time increment from the previous timer time variation to predict the next reference packet arrival time A method of operating a wireless network fire detection system.
An RF transceiver for transmitting and receiving a reference packet and a monitoring packet including at least one slave device and time slot section information;
A timer for generating a timer interrupt every time the reference packet arrival time (TM) elapses from the transmission of the reference packet;
The monitoring packet is received from the slave device in the time slot period to determine whether or not a fire has occurred. When the reception of the monitoring packet is completed, the device operates in a sleep mode. When the time interrupt occurs, And an MCU for transmitting a reference packet,
The MCU
And reflects the fluctuation information of the reference packet arrival time detected based on the reception result of the monitoring packet in the next reference packet.
Transmits and receives information about another slave device belonging to the other master device from another master device,
And transmits and receives a system control signal and information on the slave device from an upper master device.
A time difference between the present timer time change amount and the target time increment and a difference between the current timer time change amount and the target time increment in the previous timer time change amount and the difference value between the current timer time change amount and the target time increment, And estimates the next reference packet arrival time by setting the value obtained by subtracting the variation information based on the comparison result.
Sets the change information to -1 if the current timer time change amount is larger than the previous timer time change amount, sets the change information to +1 if the current timer time change amount is smaller than the previous timer time change amount, And sets the variation information to zero.
A clock module for supplying an operation clock of a low frequency to the MCU in the sleep mode and an operation clock of a high frequency to the MCU in the active mode; And
And a battery for supplying operating power to the MCU and the RF transceiver, respectively, according to the operation clock.
Sensor module for monitoring fire occurrence;
An RF transceiver for receiving a reference packet from a master device and transmitting a monitoring packet in a time slot period according to the reference packet;
An MCU for generating the monitoring packet based on sensing results of the sensor module, being synchronized according to the reference packet and detecting the time slot period from the reference packet;
A clock module for supplying a high frequency operation clock to the MCU in an active mode and supplying a low frequency operation clock to the MCU in a sleep mode; And
And a battery for supplying operating power to the MCU and the RF transceiver according to the operation clock,
The MCU
Wherein when the transmission of the monitoring packet is completed, the master device enters the sleep mode, and when the reference packet arrival time detected from the reference packet elapses, enters the active mode and receives the next reference packet from the master device.
A preamble, a sync word of the master device, variation information of the reference packet with respect to a previous reference packet, a payload and an error check code,
The MCU
And switches to the active mode and opens a reception window for receiving the next reference packet in advance when the reference packet arrival time reflecting the variation information has elapsed.
A smoke detection sensor for detecting whether or not smoke is generated according to a change in infrared transmission characteristics between an infrared LED and a photodiode; And
And a heat sensing sensor for sensing whether the ambient air of the slave device has a sudden temperature change within a predetermined time,
The MCU
And generates a monitoring packet by determining that a fire has occurred when the smoke is detected together with the sudden temperature change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140163187A KR20160060946A (en) | 2014-11-21 | 2014-11-21 | Wireless network fire sensing system and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140163187A KR20160060946A (en) | 2014-11-21 | 2014-11-21 | Wireless network fire sensing system and method thereof |
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| Publication Number | Publication Date |
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| KR20160060946A true KR20160060946A (en) | 2016-05-31 |
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| KR1020140163187A KR20160060946A (en) | 2014-11-21 | 2014-11-21 | Wireless network fire sensing system and method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190045538A (en) * | 2017-10-24 | 2019-05-03 | (주)인텔리지오 | System for water quality measurement to manage water quality based on IT and transmission method thereof |
| KR102442259B1 (en) * | 2021-11-16 | 2022-09-14 | (주)유인프라웨이 | Fire detection method using iot time synchronization delay |
| KR102569503B1 (en) * | 2022-08-03 | 2023-08-23 | (주)위니텍 | Smart fire detection system and method therefor |
-
2014
- 2014-11-21 KR KR1020140163187A patent/KR20160060946A/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190045538A (en) * | 2017-10-24 | 2019-05-03 | (주)인텔리지오 | System for water quality measurement to manage water quality based on IT and transmission method thereof |
| KR102442259B1 (en) * | 2021-11-16 | 2022-09-14 | (주)유인프라웨이 | Fire detection method using iot time synchronization delay |
| KR102569503B1 (en) * | 2022-08-03 | 2023-08-23 | (주)위니텍 | Smart fire detection system and method therefor |
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