KR102022986B1 - A Method For high speed scanning with Fire Detecter - Google Patents

Abstract

A method for scanning a state of a fire detector at high speed according to the present invention comprises the following steps of: allowing a first control unit of a fire detector to analyze a variation range by comparing a measured analog data value and an analog data value transmitted last; setting a type part of a transmission packet as ′00′ and omitting an analog data value of a data part to transmit the same if the variation range is less than or equal to a preset value; setting the type part of the transmission packet as ′01′ and transmitting only a lower one byte of the analog data value to the data part if the variation range exceeds the preset value and is within the lower one byte of three-byte data forming the analog data value; setting the type part of the transmission packet as ′10′ and transmitting only data having a lower two-byte length of the analog data value to the data part if the variation range is within the lower two bytes while exceeding the lower one byte of the three-byte data forming the analog data value; and setting the type part of the transmission packet as ′11′ and transmitting data having a three-byte length which is an entire analog data value to the data part if the variation range exceeds a lower two-byte range of the three-byte data forming the analog data value. According to the present invention, when a plurality of fire detectors are connected to one communications line, a response speed can be increased, and the number of connected terminals can be expanded.

Description

{A Method For High Speed Scanning With Fire Detecter}

The present invention relates to a method of scanning a state of a fire detector at a high speed, and more particularly, to transmit and receive data on a state of a fire detector connected by a power line communication method in which power supply and data transmission and reception are simultaneously performed through a 2-wire line. The present invention relates to a fast scan method that can be performed at high speed.

The fire detection system for detecting and alarming a fire occurrence in a building, etc. uses a heat or smoke detection fire detector to detect a fire and sends an alarm signal to a fire receiver to generate a fire alarm. The fire receiver is a device equipped with an input / output device for interlocking alarm or fire extinguishing systems such as smoke / temperature fire detectors and alarm bells installed for fire monitoring and alarm of buildings. In the case of a large-scale building such as an apartment, it is difficult to connect all the terminals directly to the main body of the fire receiver because the number of terminals such as a fire detector to be connected to the input / output terminals of the fire receiver is too large, or the distance between the fire receiver and the terminal is too far. There are often situations where direct connections are difficult. In such a case, a repeater called a repeater or repeater may be installed for each zone and connected to terminals such as a fire detector to receive the input / output data of the corresponding terminals by serial communication or the like so that the repeater can transmit and receive to the fire receiver. . In this way, when the terminal and the relay device such as the fire detector are connected by the communication method, to solve the economic problem of installing the power line and the communication line separately, or to use the old contact type fire detector line, the two-wire type It should be possible to simultaneously supply power and transmit / receive data from the relay to the terminal using a track. In this case, the relay device supplies power to a plurality of detectors through a transmission signal. When too many fire detectors are connected, the communication between the terminal and the relay device such as the fire detector is inoperable due to an increase in the power load. Can be.

In addition, in order to collect data from a plurality of fire detectors through one communication line, a polling method of sequentially checking the status of connected devices such as a fire detector is used. In case of long connection or long transmission packet such as analog data, the time required for response will be longer for a fire detector using a low speed communication speed. The problem may arise.

On the other hand, during the installation of electrical facilities of general buildings, firstly, I / O terminal devices such as fire detectors and relay devices are installed for each zone, and fire receivers are installed at the final stage of the electrical construction of buildings. Existing relay device has only data relay function, so it is not possible to check the status of terminal such as fire detector in relay device. Accordingly, only after the final stage of the construction was completed, the fire receiver was able to check the normal installation of fire detectors and alarm devices in each zone. In this case, if there is a problem in the installation state of the terminal, it is often not easy to modify due to the problem such as reconstruction of the completed part. Therefore, it is necessary to check the installation state of the terminal such as a fire detector during construction by using a relay device. There is a need to do it.

Republic of Korea Patent Publication No. 10-062197 (2006.07.10.)

The present invention minimizes the problems caused by voltage drop that may occur when a plurality of terminals are connected when using a power supply and communication at the same time by using a two-wire power line to solve the above problems in one communication line Provides a fire detector that can expand the number of fire detectors that can be connected.

The present invention provides a method of scanning the state of a fire detector at high speed in order to increase the response speed when a plurality of analog fire detectors are connected through one communication line.

In order to solve the above problems, a method of scanning a state of a fire detector according to the present invention at high speed may include analyzing a variation range by comparing a measured analog data value and a last transmitted analog data value. When the fluctuation range is less than or equal to a preset setting value, setting the type part of the transmission packet to '00' and omitting the analog data value of the data part to transmit; and, the fluctuation range exceeds the preset setting value and the analog data value If the lower 1 byte of the three-byte data constituting the set to the type of the transmission packet '01' and transmitting only the lower one byte of the analog data value to the data portion; 3 bytes of the fluctuation range constitutes the analog data value Transmission packet when the lower 1 byte is exceeded within the lower 2 bytes of data Setting the type part to '10' and transmitting only the data of the lower two bytes of the analog data value to the data part; if the variation range exceeds the lower two byte range among the three byte data constituting the analog data value, And setting the type part to '11' and transmitting data having a length of 3 bytes, which is the entire analog data value, to the data part.

In addition, the fire detector is a fire sensor for sensing a temperature or humidity analog data value; and a bridge diode (D1 ~ D4) is connected to the two-wire line and the power supply for rectifying the data signal transmitted from the relay device to the DC power supply A power supply unit connected to the power communication module and supplied with rectified DC power to convert power into a power required for a fire detector; and a transmission packet connected to the power communication module and converting a transmission packet of a fire detector into a transmission signal for relaying A transmitter for transmitting data to a device; and a receiver for receiving data of a data signal transmitted from a relay device; and a timer set when a set time elapses; and a fire sensor unit, a power communication module, a power unit, a transmitter, a receiver, and a timer. And a first controller, wherein the first controller is configured to switch the fire detector into a sleep mode for a set time. It shall be.

If the receiver address of the data received from the receiver does not match its address, the first controller switches the fire detector into a sleep mode after operating the timer, and sets the fire detector in the active mode when the timer is set after the set time has elapsed. It is characterized by reducing the power load of the power communication line by switching to.

When a plurality of analog detectors are connected to one communication line through the high-speed scan method of the fire detector of the present invention, it is possible to increase the response speed and expand the number of connected terminals.

In the case of using the power supply and communication at the same time using the two-wire line through the fire detector of the present invention, a fire detector that can be connected to one communication line by minimizing a problem due to voltage drop that may occur when a plurality of terminals are connected. You can expand the number of installations.

1 is a view for explaining the overall configuration of a fire detection system including a fire detector according to the present invention.
2 is a view for explaining a power communication module of the fire detector according to the present invention.
3 is a view for explaining a data signal waveform of the half-duplex communication method used in the fire detection system according to the present invention.
4 is a view illustrating a variable length transmission packet of a fire detector according to the present invention.
5 is a flowchart illustrating a fast scan function of a fire detector according to the present invention.
6 is a flowchart illustrating a self-diagnosis function of the relay apparatus according to the present invention.
7 is a view for explaining an example of the display unit showing a self-diagnosis result of the relay apparatus according to the present invention.

Specific structural or functional descriptions of the embodiments according to the inventive concept disclosed herein are provided for the purpose of describing the embodiments according to the inventive concept only. It may be implemented in various forms and is not limited to the embodiments described herein.

Embodiments according to the inventive concept may be variously modified and have various forms, so embodiments are illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to specific embodiments, and includes modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

Terms such as first or second may be used to describe various components, but the components should not be limited by the terms. The terms are only for the purpose of distinguishing one component from another component, for example, without departing from the scope of the rights according to the inventive concept, the first component may be called a second component, Similarly, the second component may also be referred to as the first component.

When a component is said to be “connected” or “connected” to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in the middle. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between. Expressions that describe the relationship between components, such as “between” and “immediately between” or “neighboring to” and “directly neighboring”, 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. Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms “comprise” or “have” are intended to designate that the indicated feature, number, step, operation, component, part, or combination thereof exists, but one or more other features, numbers, steps It is to be understood that the present invention does not exclude, in advance, the possibility of the presence or the addition of an operation, a component, a part, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined herein. Do not.

Hereinafter, a fire detector and a self-diagnosis function / method and a high-speed scan function / method according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The fire detection system including the fire detector according to the present invention includes a fire detector 100 and a relay device 200 as shown in FIG.

The fire detector 100 may be a general heat detection or smoke detection fire detector, or may be an analog fire detector for sensing and measuring temperature or humidity. The relay device 200 is also referred to as a relay panel or a repeater and is generally installed between the fire monitor and the fire receiver to perform a function of transmitting a state such as a fire alarm of the fire detector to the fire receiver. Recently, the number of installation of the fire detector tends to gradually increase due to the enlargement of the building, and thus the role of the relay 200 is gradually advanced and smartized. Referring to FIG. 1, a plurality of fire detectors 100 may be connected to the relay device 200 through a two-wire line (power line), and the two-wire line supplies power to the fire detector 100 from the relay device 200. At the same time it serves as a communication line between the relay device 200 and the fire detector (100).

Referring to FIG. 2, the communication through the 2-wire line is performed in a half-duplex communication method. First, the signal transmitted from the relay 200 is transmitted at + 24V when the state of the transmission data bit Bit is '1' and is transmitted at a voltage of -24V when the transmission data bit is '0'. Therefore, the transmission signal is alternately switched between -24V and + 24V. This means that the fire detector 100 receives power regardless of whether the data signal is '0' or '1' through the bridge circuit of the power communication module 130. To do so. The 24V voltage value is just an example, and various voltages such as 12V and 48V may be the reference depending on the site situation.

Since a plurality of fire detectors 100 may be connected to the 2-wire line, the fire detectors 100 should have unique addresses (IDs). The relay device 200 may designate a fire detector 100 to respond by specifying an address in a packet header when sending a data signal. The transmission signal responsive from the fire detector 100 is transmitted in a state in which + voltage or − voltage is applied to the 2-wire line. This is because if there is no voltage, the fire detector 100 cannot receive power and thus cannot respond unless there is a battery of its own. Referring to FIG. 2, the transmission signal of the fire detector 100 is transmitted by applying a high-capacity load to the two-wire line in such a manner that the voltage of the line is changed little by little. The relay device 200 detects such a voltage change by the sensor communication unit 230 and receives a transmission signal from the fire detector 100. On the other hand, if the fire detector connected to the 2-wire line increases, the power load of the line increases. Increasing the power load on a line also increases the load of high-capacity loads that must be applied to the line when a specific fire detector is to transmit. Therefore, it is difficult to infinitely increase the high-capacity load to be applied at the time of transmission due to the characteristics of the fire detector to be implemented in a small size, and a solution for this is necessary, and in the present invention, the sleep mode and the active mode are used by using the timer 140. It was introduced.

1, the fire detector 100 according to the present invention is connected to a two-wire line; and a fire sensor unit 120 for detecting whether a fire occurs by heat or smoke detection or sensing temperature or humidity analog data values; A power communication module 130 for rectifying the data signal transmitted from the relay device 200 to DC power; and a DC power rectified by being connected to the power communication module 130 to supply power to the fire detector 100. A power supply unit 150 which converts and supplies the power supply unit 150 and a power supply unit 150 which is connected to the power communication module 130 and converts a transmission packet of the fire detector 100 into a transmission signal and transmits the transmission signal to the relay device 200; and 2 Receiving unit 170 is connected to any one of the wire line to receive the data of the data signal transmitted from the relay device 200; and a timer 140 is set when the set time elapses; and the fire sensor unit 120 and Power communication module 130 and The first controller 110 controls the power supply unit 150, the transmitter 160, the receiver 170, and the timer 140.

The first control unit 110 may change the fire detector 100 into a sleep mode for a set time.

The fire sensor unit 120 may be a heat storage or differential thermal sensor, and may be a photoelectric smoke detection sensor. In addition, the fire sensor unit 120 may be configured as a temperature sensor or a humidity sensor as an analog sensor. In this case, the output value may be an analog data value, and in general, the analog data value is 3 bytes long.

Referring to FIG. 3, the power communication module 130 includes a bridge diode D1 to D4 circuit. The bridge diode circuit is connected to the two-wire line to rectify the DC power from the data signal transmitted from the relay 200 to be used as the power inside the fire detector (100). Since the data signal transmitted from the relay device 200 is configured with + and − voltages, DC power may be supplied to the fire detector 100 regardless of the state (0 or 1) of the data bit. The anodes of diodes D1 and D4 of the bridge diode circuit are connected to ground, the cathode of D1 and the anode of D2 are connected to the receiver 170, and the cathodes of D2 and D3 are connected to the transmitter 160 and the power supply 150. .

The power supply unit 150 receives the rectified DC power connected to the power communication module 130 and converts the power into the power required for the fire detector 100. This is because the voltage driving various elements inside the fire detector 100 may be different from the voltage rectified from the two-wire line. The voltage supplied by the power supply unit 150 may be 3.3V for driving various elements inside the fire detector, but is not limited thereto.

The transmitter 160 is connected to the power communication module 130 and converts the transmission packet of the fire detector 100 into a transmission signal and transmits it to the relay device 200. The transmission packet may be configured as a variable length transmission packet as shown in FIG. The transmitter 160 of the fire detector 100 transmits a transmission signal to the relay device 200 by varying the voltage applied to the two-wire line by varying the load by applying a high capacity load to the two-wire line. To this end, the transmission unit 160 may be connected to the contacts (cathodes of D2 and D3) to which the power communication module 130 and the power supply unit 150 are connected.

The receiver 170 is connected to any one line of the two-wire line to receive data of a data signal transmitted from the relay device 200. More specifically, the bridge diode may be configured to detect a voltage change between the connection portion of the D1 cathode and the D2 anode and the ground, but is not limited thereto. The receiver 170 may be connected to the connection portion of the D4 cathode and the D3 anode, if necessary. It may also be configured to detect voltage variations between grounds.

The timer 140 may set an operation time. When the operation of the timer 140 starts, the timer 140 is set up after the set time has elapsed. The meaning of the set is a signal indicating that the set time has elapsed, and serves to inform the first controller 110 that the duration of the sleep mode, which will be described later, has ended.

The first control unit 110 controls the fire sensor unit 120, the power communication module 130, the power supply unit 150, the transmitter 160, the receiver 170 and the timer 140. The first controller 110 may control the fire sensor 120 to transmit the sensing result to the transmission packet and transmit the sensing result to the relay device 200 through the transmitter 160. The first control unit 110 analyzes the data signal from the relay device 200 received from the receiving unit 170 to determine whether it matches with its own address ID, and responds if it matches.

On the other hand, the recent increase in the size of the building has a tendency to increase the number of installation of the fire detector (100). When the fire detector 100 connected to the same two-wire line increases, this results in an increase in power load to be supplied by the relay device 200. Increasing the power load burdens the transmission unit 160 of the fire detector 100 to apply an increasingly high load to the two-wire line when trying to transmit data. As a result, the number of connectable fire detectors 100 is limited, and in the conventional fire detection system, up to 128 fire detectors 100 can be connected to one line.

However, the fire detector 100 of the present invention uses one timer 140 to control the operation state of the first control unit 110 in the sleep mode (Sleep Mode) and the active mode (Active Mode) by one line of the fire detection system The number of fire detectors 100 that can be connected to can dramatically increase.

More specifically, the first control unit 110 switches the fire detector 100 to the sleep mode after operating the timer 140 when the receiver address of the data packet received from the receiving unit 170 does not match its own address. When the timer 140 is set after the set time elapses, the fire detector 100 is switched to the active mode. In the dormant mode, the fire detector 100 stops the operation of the fire sensor unit 120, the transmitter 160, the power supply unit 150, etc. so as not to put a power burden on the 2-wire line. That is, only the fire detector 100 having the same address becomes the active mode and the remaining fire detectors 100 become the dormant mode, so that all the fire detectors are active in transmitting the transmission signal to the relay device 200. Since the load having a much smaller capacity may be applied to the two-wire line than in the mode, it is effective in reducing the transmission burden of the small fire detector 100 and thus connecting more fire detectors 100 to the same line. To make it possible.

The setting time of the timer 140 may be a time range in which the other fire detector 100 may complete data transmission to the relay device 200. The transmission packet of the fire detector 100 may be composed of about 4 to 5 bytes long, which is 32 to 40 bits long. For example, if the transmission speed is 9600bps, the 1-bit transmission time is about 0.1 mS, so the setting time should be at least 4 mS. In addition, if the set time is too long, the time required to scan the entire fire detector 100 may be increased, so an appropriate time setting is necessary.

Referring back to FIG. 1, the relay device 200 includes a detector communication unit 230, a display unit 210, an input unit 220, and a second control unit 250. The relay device 200 may be connected to a plurality of fire detectors 100 on one line. One such line may be called a channel. One relay device 200 may be configured to include a plurality of channels. In addition, each channel may be configured to use various serial communication methods. For example, communication methods such as RS-232C, RS-485, RS-422, and Modbus may be used.

The detector communication unit 230 transmits data using a plurality of fire detectors 100 connected to a two-wire line and a power line communication method of a half-duplex communication method. The detector communication unit 230 supplies power to the fire detector 100 by continuously applying power to the 2-wire line even when receiving data. The fire detector 100 transmits a transmission signal to the relay device 200 in a manner of applying a high capacity load to the two-wire line. When a high capacity load is applied to the two-wire line, the fire detector 100 transmission signal of FIG. It causes a voltage fluctuation like a pattern. The sensor communication unit 230 detects the voltage variation of the two-wire line to receive data from the fire detector 100.

The receiver communication unit 240 of the relay device 200 is connected to a fire receiver (not shown) to transmit the state of the fire detectors 100 to the fire receiver (not shown), and receives a command from the fire receiver. Connection to the fire receiver may use a high speed communication network such as an Ethernet network or a mobile communication network.

The relay device 200 according to the present invention includes an input unit 220, a display unit 210, and a second control unit 250. For this reason, even if the fire receiver is not connected, the relay device 200 may directly check the states of terminals such as the fire receiver.

When the self-diagnosis execution is selected through the input unit 220, the second control unit 250 calls a plurality of fire detectors 100 connected to the two-wire line in turn and analyzes the response signals of the fire detectors 100 to analyze the plurality of fire signals. The state of the fire detector 100 may be displayed on the display 210. The input unit 220 and the display unit 210 may be implemented as separate devices such as a keyboard and a monitor, and may be implemented in a touch screen and included in one device as necessary.

4 shows a flowchart of a method of performing self-diagnosis. The self-diagnosis method includes selecting a self-diagnosis function and selecting a channel to perform self-diagnosis through the input unit 220 of the relay 200, and calling and receiving terminals sequentially connected to the selected channel. Analyzing the signal, the relay device 200 includes displaying the state of the terminal on the display unit 210 according to the analysis result. The state of the terminal may be a communication state with the terminal, the type and state value of the terminal, the presence or absence of a short circuit of the line, and the like. FIG. 7 is a diagram illustrating an example of displaying a result of self-diagnosis of one channel on the display 210.

The terminal may be a fire detector 100 according to the present invention described above. 1, the fire detector 100 is connected to the two-wire line and the fire sensor unit 120 for detecting whether the fire occurs by heat or smoke detection or sensing the temperature or humidity analog data value; Power communication module 130 to rectify the data signal transmitted from the DC power supply; and DC power rectified in connection with the power communication module 130 is supplied to convert the power to the power required for the fire detector (100) A power supply unit 150; and a transmission unit 160 connected to the power communication module 130 and converting a transmission packet of the fire detector 100 into a transmission signal and transmitting the transmission signal to the relay device 200; A receiving unit 170 connected to one line to receive data of a data signal transmitted from the relay device 200; and a timer 140 set when a set time elapses; and a fire sensor unit 120 and a power communication module ( 130) and the power supply unit 150 and the song The first controller 110 controls the bride 160, the receiver 170, and the timer 140.

Referring to FIG. 3, the power communication module 130 includes a bridge diode D1 to D4 circuit. The bridge diode circuit is connected to the two-wire line to rectify the DC power from the data signal transmitted from the relay 200 to be used as the power inside the fire detector (100). Since the data signal transmitted from the relay device 200 is composed of + and − voltages, the DC power may be supplied to the fire detector 100 regardless of the state (0, 1) of the data. The anodes of diodes D1 and D4 are connected to ground, and the cathodes of D2 and D2 are connected to the transmitter 160 and the power supply 150.

The power supply unit 150 receives the rectified DC power connected to the power communication module 130 and converts the power into the power required for the fire detector 100. This is because the voltage driving the various elements inside the fire detector 100 may be different from the voltage rectified in the 2-wire line. The voltage supplied by the power supply unit 150 may be 3.3V, but is not limited thereto.

The transmitter 160 is connected to the power communication module 130 and converts the transmission packet of the fire detector 100 into a transmission signal and transmits it to the relay device 200. As described above, the transmission signal is transmitted to the relay device 200 by varying the load of the two-wire line and changing the voltage applied to the two-wire line. To this end, the transmission unit 160 may be connected to the contacts (cathodes of D2 and D2) to which the power communication module 130 and the power supply unit 150 are connected.

The receiver 170 is connected to any one line of the two-wire line to receive data of a data signal transmitted from the relay device 200. More specifically, the bridge diode may be configured to detect a voltage change between the connection portion of the D1 cathode and the D2 anode and the ground, but is not limited thereto. The receiver 170 may be connected to the connection portion of the D4 cathode and the D3 anode, if necessary. It may also be configured to detect voltage variations between grounds.

The timer 140 may set an operation time. When the operation of the timer 140 starts, the timer 140 is set up after the set time has elapsed. The meaning of the set is a signal indicating that the set time has elapsed, and serves to inform the first controller 110 that the duration of the sleep mode, which will be described later, has ended.

The first control unit 110 controls the fire sensor unit 120, the power communication module 130, the power supply unit 150, the transmitter 160, the receiver 170 and the timer 140. The first controller 110 may control the fire sensor 120 to transmit the sensing result to the transmission packet to the relay device 200 through the transmitter 160. The first control unit 110 analyzes the data signal from the relay device 200 received from the receiving unit 170 to determine whether its own address (ID) and respond.

More specifically, the first controller 110 operates the timer 140 when the receiver address of the data received from the receiver 170 does not match its address, and then switches the fire detector 100 to the sleep mode. When the timer 140 is set after the set time elapses, the fire detector 100 is switched to the active mode. In the dormant mode, the fire detector 100 stops the operation of the fire sensor unit 120, the transmitter 160, the power supply unit 150, etc. so as not to put a power burden on the 2-wire line. Since only the fire detector 100 having the same address becomes the active mode and the remaining fire detectors 100 are in the dormant mode, the corresponding fire detector 100 transmits a transmission signal to the relay device 200 to load a smaller high capacity load. Since it may be applied to a wire track, the transmission burden of the fire detector 100 can be reduced, and thus, more fire detectors 100 can be connected to the same track.

The setting time of the timer 140 may be a time range in which the other fire detector 100 may complete data transmission to the relay device 200.

Referring to FIG. 5, an example of a data format of a transmission packet transmitted from a fire detector 100 when the fire detector 100 is an analog fire detector 100 is shown.

The analog fire detector 100 includes an analog sensor for generating an analog data value by sensing temperature or humidity, and the transmission packet transmitted from the fire detector 100 includes an address portion, a type portion, a data portion, and a checksum portion. . In one exemplary embodiment of the present invention, an address portion of a transmission packet is 1 byte, a type portion is 2 bits, a data portion is a variable length of 0 to 3 bytes in length, and a checksum portion is designed to be 1 byte in length. However, the present invention is not limited thereto, and it is obvious that the present invention can be adapted to a specific situation. In particular, the 2-bit type part can be changed to a size of 1 byte or more if necessary when constructing a packet, and the address and data parts can also be changed to sizes of 1 byte or more and 3 bytes or more, respectively, as necessary.

In order to scan a plurality of fire detectors 100 at high speed, it is necessary to shorten the response time of each fire detector 100. Increasing the scan speed per channel of the fire detector 100 by 2 to 3 times is because it can be a very important performance factor due to the characteristics of the fire detector 100 operating at a low speed (9600bps) communication speed. Therefore, in order to shorten the response time of the fire detector 100, the length of the transmission packet should be shortened. In this case, a special method for shortening the length of the transmission packet is required. The characteristics of analog data, such as temperature or humidity data, have the property that the variation of data values is not fast over time. Analog data values are typically transmitted as three bytes of data. If the fluctuation range of the data value is insignificant, if the transmission packet is configured by reducing the three-byte data, the time required for the response can be shortened, and the more analog fire detectors 100 are connected, the effect will increase.

6 is a flowchart illustrating a method for scanning the state of the analog fire detector 100 at high speed. The fire detector 100 is the same as the above-described fire detector 100, so a description thereof will be omitted.

In the method for scanning the state of the fire detector 100 at high speed, the first control unit 110 of the fire detector 100 analyzes the variation range by comparing the measured analog data value and the last transmitted analog data value. If the fluctuation range is less than the preset setting value, set the type part of the sending packet to '00' and omit the analog data value of the data part to transmit. If the lower 1 byte of the 3-byte data is set, set the type part of the transmission packet to '01', and transmit only the lower 1 byte of the analog data value to the data part, and the lower range among the 3-byte data constituting the analog data value If it exceeds 1 byte and is within the lower 2 bytes, set the type of transmission packet to '10'. Transmitting only the lower 2 bytes of data among the analog data values in the data part.If the variation range exceeds the lower 2 bytes of the 3 byte data constituting the analog data value, set the type part of the transmission packet to '11'. And transmitting three bytes of data, which is an entire analog data value, to the unit. In this way, the transmission packet becomes a variable length transmission packet to prevent unnecessary data transmission.

More specifically, the first control unit 110 of the fire detector 100 of the present invention compares the current analog data value with the previous value to analyze the variation range and the data value if the variation range is less than or equal to a preset predetermined value. The time required for the response can be shortened by omitting the data portion in a transmission packet in which the content not to be transmitted is indicated in the type portion. This makes it possible to scan a plurality of fire detectors 100 at high speed by reducing the transmission time by not transmitting data when the change is small enough to be meaningless. Therefore, the predetermined predetermined value may be unchanged or a small value ranging from 4 to 5 bits may be set.

Also, if the current analog data value is compared with the previous value and only the lower 1 byte is transmitted within the lower 1 byte range, only the lower 1 byte data is sent to the transmission packet marked with Type. The time required for the response can be shortened. Similarly, if the variation range is the lower 2 byte range, only the lower 2 bytes of data can be transmitted in a transmission packet that indicates that only the lower 2 bytes are transmitted. When the fluctuation range is large or the whole analog data value needs to be sent, this information can be displayed in the type section, and then the entire data value of 3 bytes can be transmitted. The address (ID) of the transmission packet is displayed with the address of the corresponding terminal and may have a length of 1 byte in general, but may be configured to be larger than that depending on the number of connected terminals. The type part may be configured to have a size of 2 bits as a part for distinguishing the contents of the analog data value. It may have a separator of '00', '01', '10', and '11'. When the type part is '00', this may indicate that the subsequent data part is 0 bytes long. When the type part is '01', this may indicate that the subsequent data part is 1 byte long. If the type part is '10', this may indicate that the subsequent data part is 2 bytes long. In the case of the type portion '11', this may indicate that the subsequent data portion is 3 bytes. This eliminates the transmission of unchanged data, thereby reducing the time required for transmission so that a plurality of fire detectors 100 can be scanned at high speed.

As described above, a preferred embodiment of the fire detector, the self-diagnosis function, and the high-speed scan function according to the present invention have been described.

The described embodiments are to be understood in all respects as illustrative and not restrictive, the scope of the invention being indicated by the following claims rather than the foregoing description. And it is to be understood that all changes and modifications derived from the equivalent concept as well as the meaning and scope of the claims are included in the scope of the present invention.

100: fire detector
110: first control unit
120: fire sensor
130: power communication module
140: timer
150: power supply
160: transmitter
170: receiver
200: repeater
210: display unit
220: input unit
230: detector communication unit
240: receiver communication unit
250: second control unit

Claims (5)

In the method of scanning the state of the fire detector at high speed,
The first control unit of the fire detector compares the measured analog data value and the last transmitted analog data value to analyze the variation range;
Setting the type portion of the transmission packet to '00' and omitting analog data values of the data portion if the variation range is less than or equal to a preset value;
If the variation range exceeds the preset value and is within the lower 1 byte of the 3-byte data constituting the analog data value, set the type of the sending packet to '01' and send only the lower 1 byte of the analog data value to the data. step;,
If the fluctuation range exceeds the lower 1 byte of the 3-byte data constituting the analog data value and is within the lower 2 bytes, set the type part of the transmission packet to '10' and send only the lower 2 bytes of data among the analog data values The step of;
If the variation range exceeds the lower 2 byte range among the 3 byte data constituting the analog data value, setting the type portion of the transmission packet to '11' and transmitting the 3-byte length data of the entire analog data value to the data portion; ,
The fire detector is a fire sensor for sensing a temperature or humidity analog data value; And,
A power communication module composed of bridge diodes (D1 to D4) and connected with a 2-wire line to rectify the data signal transmitted from the relay device to a DC power source; and
A power supply unit connected to the power communication module to receive rectified DC power and convert the power into a power required for a fire detector;
A transmission unit connected to the power communication module and converting a transmission packet of a fire detector into a transmission signal and transmitting the transmission signal to a relay device;
Receiving unit for receiving data of the data signal transmitted from the relay device; And
A timer set when the set time elapses; and
A first control unit controlling a fire sensor unit, a power communication module, a power unit, a transmitter, a receiver, and a timer,
The first controller is a high-speed scan method of the state of the fire detector, characterized in that for switching the fire detector to the sleep mode for a set time.
delete The method according to claim 1,
If the receiver address of the data received from the receiver does not match its own address, the first controller switches the fire detector to the sleep mode after operating the timer, and sets the fire detector to the active mode when the timer is set after the set time has elapsed. A method of scanning the state of a fire detector at a high speed, characterized by reducing the power load on the power communication line by switching to.
The method according to claim 1,
And the receiving unit is configured to detect a voltage change between the connection portion of the D1 cathode and the D2 anode of the bridge diode and the ground, at a high speed.
The method according to claim 1,
And the transmitting unit transmits a transmission signal to the relay apparatus by varying the load of the two-wire line and changing the voltage applied to the two-wire line.

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