# US 12,008,883 B2 · Alarm-based prevention and control method, internet of things system, and medium for safety risk of smart gas

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- Number: US 12,008,883 B2
- Document ID: US12008883B2
- Status: Granted
- Kind: B2
- Application number: 18/465,127
- Filed: 2023-09-11
- Published: 2023-12-28
- Granted: 2024-06-11
- Earliest claimed: 2023-07-21
- Assignees: Chengdu Qinchuan Iot Technology Co., Ltd.
- Applicants: Chengdu Qinchuan Iot Technology Co., Ltd.
- Inventors: Zehua Shao; Yaqiang Quan; Yuefei Wu; Bin Liu
- Web page: https://patentgrep.com/patent/US12008883B2

## CPC

- G08B 21/12: responsive to undesired emission of substances, e.g. pollution alarms
- G08B 21/14: Toxic gas alarms (G08B21/16 takes precedence)
- F24F 11/30: for purposes related to the operation of the system, e.g. for safety or monitoring
- G08B 21/16: Combustible gas alarms
- G08B 21/24: Reminder alarms, e.g. anti-loss alarms
- G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)

## Abstract

The embodiments of the present disclosure provide an alarm-based prevention and control method and an Internet of Things (IoT) system for a safety risk of smart gas, including: obtaining gas monitoring data based on a data acquisition instruction, and determining whether a gas leakage occurs; in response to a determination that the gas leakage occurs, generating a control instruction based on a fan operation strategy to control operation of a fan, and obtaining the gas monitoring data under the fan operation strategy, the fan being configured to remove leaking gas and assist in determining a type of the gas leakage; and generating a notification instruction based on the gas monitoring data in conjunction with an operating strategy of an indicator light, and controlling the indicator light to issue an alarm notification based on the notification instruction.

## Claims

### Claim 1

An alarm-based prevention and control method for a safety risk of smart gas, performed by a smart gas safety management platform of an alarm-based prevention and control Internet of Things (IoT) system for a safety risk of smart gas, comprising:
obtaining gas monitoring data based on a data acquisition instruction, and determining whether a gas leakage occurs;
in response to a determination that the gas leakage occurs, generating a control instruction based on a fan operation strategy to control operation of a fan, and obtaining the gas monitoring data under the fan operation strategy, the fan being configured to remove leaking gas and assist in determining a type of the gas leakage; and
generating a notification instruction based on the gas monitoring data in conjunction with an operating strategy of an indicator light, and controlling the indicator light to issue an alarm notification based on the notification instruction; the type of the gas leakage including a continuous leakage and an occasional leakage; wherein the fan being configured to remove leaking gas and assist in determining a type of the gas leakage includes:
determining the type of the gas leakage by processing the fan operation strategy, an operating condition of the indicator light, and the gas monitoring data of at least one time point through a type determination model, the type determination model being a machine learning model, the type determination model including an extraction layer and a determination layer; the extraction layer being configured to determine gas concentration change characteristics by processing the gas monitoring data of the at least one time point, wherein the gas concentration change characteristics include a change rate of gas concentration and a change range of gas concentration; and the determination layer being configured to determine the type of the gas leakage by processing the fan operation strategy, the operating condition of the indicator light, and the gas concentration change characteristics; and
determining, based on the gas concentration, the gas concentration change characteristics, and historical gas leakage data, the operating strategy of the indicator light by a preset manner; the preset manner including a table looking up manner and a vector match manner; wherein the operating strategy of the indicator light includes a flicker frequency and a flicker state; wherein a gas concentration characteristics value is determined based on a weighted sum of an influence degree of the gas concentration on the flicker frequency and an influence degree of the gas concentration change characteristic on the flicker frequency; the flicker frequency is determined based on the gas concentration characteristics value; a confidence level of the flicker frequency is determined based on the fan operation strategy; and the flicker frequency is adjusted based on the confidence level.

### Claim 2 (depends on 1)

The method of claim 1, wherein the fan operation strategy is determined by a process including:
determining a leakage risk value based on gas equipment usage data; and
determining the fan operation strategy based on the leakage risk value, the fan operation strategy including at least one of an operating power, an operating duration, and a rotation direction of the fan.

### Claim 3 (depends on 1)

The method of claim 1, wherein the generating a notification instruction based on the gas monitoring data in conjunction with an operating strategy of an indicator light, and controlling the indicator light to issue an alarm notification based on the notification instruction includes:
sending a reminder message to a user terminal based on the flicker state and the flicker frequency of the indicator light, the reminder message including whether of the gas leakage occurs, and the gas concentration.

### Claim 4

An alarm-based prevention and control Internet of Things (IoT) system for a safety risk of smart gas, wherein the IoT system includes a smart gas user platform, a smart gas service platform, a smart gas safety management platform, a smart gas indoor equipment sensor network platform, and a smart gas indoor equipment object platform, wherein
the smart gas user platform includes a plurality of smart gas user sub-platforms;
the smart gas service platform includes a plurality of smart gas service sub-platforms;
the smart gas safety management platform includes a plurality of smart gas indoor safety management sub-platforms and a smart gas data center;
the smart gas indoor equipment sensor network platform is configured to interact with the smart gas data center and the smart gas indoor equipment object platform;
the smart gas indoor equipment object platform is configured to obtain gas monitoring data based on a data acquisition instruction;
the smart gas safety management platform is configured to obtain the gas monitoring data from the smart gas data center and determine whether a gas leakage occurs; in response to a determination that the gas leakage occurs, generate, based on a fan operation strategy, a control instruction to control operation of a fan, and obtain the gas monitoring data under different fan operation strategies, the fan being configured to remove leaking gas and assist in determining a type of the gas leakage; generate a notification instruction based on the gas monitoring data in conjunction with an operating strategy of an indicator light; and transmit the notification instruction to the smart gas service platform via the smart gas data center; the type of the gas leakage including a continuous leakage and an occasional leakage;
the smart gas safety management platform is further configured to determine the type of the gas leakage by processing the fan operation strategy, an operating condition of the indicator light, and the gas monitoring data of at least one time point through a type determination model, the type determination model being a machine learning model; wherein the type determination model includes an extraction layer and a determination layer; the extraction layer is configured to determine gas concentration change characteristics by processing the gas monitoring data of the at least one time point; the gas concentration change characteristics including a change rate of gas concentration and a change range of gas concentration; and the determination layer is configured to determine the type of the gas leakage by processing the fan operation strategy, the operating condition of the indicator light, and the gas concentration change characteristics;
the smart gas safety management platform is further configured to determine, based on the gas concentration, the gas concentration change characteristics, and historical gas leakage data, the operating strategy of the indicator light by a preset manner; the preset manner including a table looking up manner and a vector match manner; wherein the operating strategy of the indicator light includes a flicker state and a flicker frequency; the smart gas safety management platform is further configured to: obtain a gas concentration characteristics value based on a weighted sum of an influence degree of the gas concentration on the flicker frequency and an influence degree of the gas concentration change characteristic on the flicker frequency; determine the flicker frequency based on the gas concentration characteristics value; determine a confidence level of the flicker frequency based on the fan operation strategy; and adjust the flicker frequency based on the confidence level; and
the smart gas service platform is configured to upload the notification instruction to the smart gas user platform, and the smart gas user platform issues an alarm notification based on the notification instruction.

### Claim 5 (depends on 4)

The IoT system of claim 4, wherein the smart gas safety management platform is further configured to:
determine a leakage risk value based on gas equipment usage data; and
determine the fan operation strategy based on the leakage risk value, the fan operation strategy including at least one of an operating power, an operating duration, and a rotation direction of the fan.

### Claim 6 (depends on 4)

The IoT system of claim 4, wherein the smart gas safety management platform is further configured to:
send a reminder message to a user terminal based on the flicker state and the flicker frequency of the indicator light, the reminder message including whether the gas leakage occurs, and the gas concentration.