# US 12,183,185 B2 · Fire alarm apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,185 B2 - Document ID: US12183185B2 - Status: Granted - Kind: B2 - Application number: 17/908,460 - Filed: 2021-03-04 - Published: 2023-10-26 - Granted: 2024-12-31 - Earliest claimed: 2020-03-05 - Assignees: ROZETATECH Co., Ltd. - Applicants: ROZETATECH Co., Ltd. - Inventors: Youngjin Cho - Web page: https://patentgrep.com/patent/US12183185B2 ## CPC - G08B 25/009: {Signalling of the alarm condition to a substation whose identity is signalled to a central station, e.g. relaying alarm signals in order to extend communication range} - G08B 17/00: Fire alarms; Alarms responsive to explosion - G08B 25/003: {Address allocation methods and details} - G08B 25/10: using wireless transmission systems {(G08B25/009 takes precedence)} - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS ## Abstract A fire alarm apparatus according to an embodiment of the present invention may include a plurality of sensing modules and a repeater. When receiving the fire alarm signal from each of the plurality of sensing modules, the repeater transmits a signal to each of the plurality of sensing modules after a first time elapses, the signal comprises an acknowledgment response to the fire alarm signal and a control signal for controlling each of the plurality of sensing modules, and the acknowledgment response and the control signal are transmitted integrally. ## Claims ### Claim 1 A fire alarm apparatus comprising: a plurality of sensing modules configured to generate a fire alarm signal by detecting fire occurrence with different address values and an amplified fire alarm signal from the fire alarm signal, and perform Radio Frequency (RF) communication with each other; and a repeater configured to perform RF communication with each of the plurality of sensing modules and receive the fire alarm signal from the plurality of sensing modules, wherein when receiving the fire alarm signal from each of the plurality of sensing modules, the repeater transmits a repeater signal to each of the plurality of sensing modules after a first time elapses, wherein the repeater signal comprises an acknowledgment response to the fire alarm signal and a control signal for controlling each of the plurality of sensing modules, wherein the acknowledgment response and the control signal are transmitted integrally in one data frame, and wherein the repeater receives the amplified fire alarm signal from the sensing modules, and when receiving the amplified fire alarm signal, the repeater transmits the repeater signal to each of the plurality of sensing modules after the first time elapses. ### Claim 2 (depends on 1) The fire alarm apparatus of claim 1, wherein the control signal initializes states of the plurality of sensing modules. ### Claim 3 (depends on 1) The fire alarm apparatus of claim 1, wherein a magnitude of the fire alarm signal is greater than a magnitude of the repeater signal. ### Claim 4 (depends on 1) The fire alarm apparatus of claim 1, wherein the first time is a short inter-frame space (SIFS). ### Claim 5 (depends on 1) The fire alarm apparatus of claim 1, wherein when the repeater signal is not received, each of the plurality of sensing modules retransmits the fire alarm signal to the repeater after a second time. ### Claim 6 (depends on 5) The fire alarm apparatus of claim 5, wherein the second time is 1 minute. ### Claim 7 (depends on 1) The fire alarm apparatus of claim 1, wherein when the repeater signal is received, each of the plurality of sensing modules stops transmitting the fire alarm signal. ### Claim 8 (depends on 1) The fire alarm apparatus of claim 1, further comprising a server communicating with the repeater. ### Claim 9 (depends on 8) The fire alarm apparatus of claim 8, wherein each of the plurality of sensing modules comprises: a sensor configured to generate the fire alarm signal when it is determined as a fire situation by detecting at least one of smoke, temperature, humidity, and gas; a sensing memory unit configured to store the address value; an amplification unit configured to amplify the fire alarm signal received from at least one of a plurality of adjacent sensing modules to generate the amplified fire alarm signal; and a sensing communication unit configured to receive the fire alarm signal or the amplified fire alarm signal, transmit the fire alarm signal or the amplified fire alarm signal to at least one of the plurality of adjacent sensing modules and the repeater, and receive the repeater signal. ### Claim 10 A fire alarm apparatus comprising: a plurality of sensing modules configured to generate a fire alarm signal by detecting fire occurrence with different address values and perform Radio Frequency (RF) communication with each other; a repeater configured to perform RF communication with each of the plurality of sensing modules and receive the fire alarm signal from the plurality of sensing modules, and a server communicating with the repeater, wherein when receiving the fire alarm signal from each of the plurality of sensing modules, the repeater transmits a repeater signal to each of the plurality of sensing modules after a first time elapses, wherein the repeater signal comprises an acknowledgment response to the fire alarm signal and a control signal for controlling each of the plurality of sensing modules, wherein the acknowledgment response and the control signal are transmitted integrally, wherein each of the plurality of sensing modules comprises: a sensor configured to generate the fire alarm signal when it is determined as a fire situation by detecting at least one of smoke, temperature, humidity, and gas; a sensing memory unit configured to store the address value; an amplification unit configured to amplify the fire alarm signal received from at least one of a plurality of adjacent sensing modules to generate an amplified fire alarm signal; and a sensing communication unit configured to receive the fire alarm signal or the amplified fire alarm signal, transmit the fire alarm signal or the amplified fire alarm signal to at least one of the plurality of adjacent sensing modules and the repeater, and receive the repeater signal; wherein the repeater receives the amplified fire alarm signal from the sensing modules, and when receiving the amplified fire alarm signal, the repeater transmits the repeater signal to each of the plurality of sensing modules after the first time elapses. ### Claim 11 (depends on 9) The fire alarm apparatus of claim 9, wherein the repeater comprises: an alarm unit including a speaker and configured to generate a warning alarm; a first communication unit configured to receive the fire alarm signal from each of the plurality of sensing modules and transmit the repeater signal to each of the plurality of sensing modules; a second communication unit configured to transmit the fire alarm signal to the server; a first power supply unit configured to receive a first power from the outside; a second power supply unit configured to supply a second power; a first button configured to initialize the repeater; a second button configured to stop the warning alarm; and a third button configured to transmit a preliminary fire alarm signal to the server. ### Claim 12 (depends on 11) The fire alarm apparatus of claim 11, wherein the server comprises: a memory in which information of parties corresponding to the address value is stored; a transmission unit configured to transmit a fire alarm message to the parties; and a reception unit configured to receive the fire alarm signal and the preliminary fire alarm signal from the repeater. ### Claim 13 (depends on 1) The fire alarm apparatus of claim 1, wherein the acknowledgment response and the control signal are provided in the same data frame. ### Claim 14 Method of operation of a fire alarm apparatus, the method comprising: a plurality of sensing modules generating a fire alarm signal by detecting fire occurrence with different address values and an amplified fire alarm signal from the fire alarm signal, and performing Radio Frequency (RF) communication with each other; and a repeater performing RF communication with each of the plurality of sensing modules and receiving the fire alarm signal from the plurality of sensing modules, the repeater transmitting a repeater signal to each of the plurality of sensing modules after a first time elapses, wherein the repeater signal comprises an acknowledgment response to the fire alarm signal and a control signal for controlling each of the plurality of sensing modules, wherein the acknowledgment response and the control signal are transmitted integrally in one data frame, and wherein the repeater receives the amplified fire alarm signal from the sensing modules, and when receiving the amplified fire alarm signal, the repeater transmits the repeater signal to each of the plurality of sensing modules after the first time elapses.