A low-power gas detector control system and method

Abstract

The present invention relates to the technical field of data testing and processing, and particularly to a low-power gas detector control system and method, which includes a number of gas detectors, a data acquisition module, a data processing module, and an operation matching module; the operation matching module determines the working characterization state of the corresponding gas detector and the working response state of the sensor group according to the characteristic time period of a single pipeline connection, determines the leakage tendency according to the real-time temperature data and real-time humidity data of a single pipeline connection to determine whether to analyze the flowing audio information, and determines whether to change the working characterization state of the corresponding gas detector according to the leakage tendency and the real-time audio amplitude. By comprehensively considering various data and realizing intelligent determination and response, the present invention not only improves the efficiency and accuracy of hazardous gas leakage monitoring, ensures the safe operation of the pipeline system, but also reduces the energy consumption of the gas detector through the complementary working mode between the gas detector and the sensor group.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing, and in particular, to a low-power gas detector control system. Background Art

[0002] A gas detector is an instrument for detecting various gas components and their concentrations in the environment, and is often used in the petrochemical industry to detect combustible gases and toxic gases in places such as refineries and chemical plants to prevent explosion and personnel poisoning accidents. Usually, gas detectors are installed around the refining unit and the leakage situation is monitored in real time. Once the gas concentration exceeds the safety threshold, an alarm will be issued to remind the staff to take measures.

[0003] Chinese Patent Publication No. CN220961460U discloses a low-power online gas detector, which includes a control main board, a gas sensor, and a power supply unit. The power supply unit is powered by a lithium thionyl chloride battery. The gas sensor is used to detect hydrogen sulfide, carbon monoxide, carbon dioxide, and oxygen. The control main board uses an STM32 ultra-low-power microcontroller as the processing center, which can support ultra-long standby and strict power consumption management. All circuits use low-power devices, and the alarm signal is output to a buzzer, a display screen, and a host computer, thereby realizing the function of low-power 24-hour continuous online gas monitoring. It can be seen that the utility model has the following problems:

[0004] It fails to determine the operating status of each gas detector according to historical leakage information, and also fails to timely detect gas leakage and adjust the status of the gas detector in the sleep state of the gas detector, thus causing the problem of high power consumption. Summary of the Invention

[0005] Therefore, the present invention provides a low-power gas detector control system to overcome the problems in the prior art that the operating status of each gas detector cannot be determined according to historical leakage information, and gas leakage cannot be detected and the status of the gas detector cannot be adjusted in time when the gas detector is in the sleep state, thus causing high power consumption.

[0006] To achieve the above object, the present invention provides a low-power gas detector control system, including:

[0007] A plurality of gas detectors for detecting the concentration of harmful gases at the joints of each pipeline in the harmful gas transportation pipeline network;

[0008] The data acquisition module is set at each pipeline connection of the hazardous gas transportation pipeline network, including an information storage unit for obtaining the historical leakage information of each pipeline connection, and several sensor groups for obtaining the temperature data, humidity data and flowing audio information of gas flow at each connection. The historical leakage information includes the historical leakage time point, historical temperature data, historical humidity data and historical flowing audio information;

[0009] The data processing module is connected to the data acquisition module, and is used for dividing a preset time period into several characteristic time periods according to the historical leakage information of a single pipeline connection, determining a temperature reference value and a humidity reference value according to the historical temperature data and historical humidity data of a single pipeline, constructing a time-domain audio waveform diagram according to the flowing audio information to determine the amplitude normal distribution diagram of the normal time period, and determining the audio amplitude reference range according to the amplitude normal distribution diagram;

[0010] Among them, the characteristic time periods include abnormal time periods and normal time periods;

[0011] The operation matching module is respectively connected to each of the gas detectors, the data acquisition module and the data processing module, and is used for determining the working characterization state of the gas detector and the working response state of the sensor group at the corresponding pipeline connection according to the characteristic time period of a single pipeline connection, determining the leakage tendency according to the real-time temperature data and real-time humidity data of a single pipeline connection to determine whether to analyze the flowing audio information, and determining whether to change the working characterization state of the corresponding gas detector according to the leakage tendency and the real-time audio amplitude.

[0012] As a preferred technical solution of the low-power gas detector control system, a sensor group is provided at each pipeline connection, and a single sensor group includes a temperature sensor, a humidity sensor and an audio sensor.

[0013] As a preferred technical solution of the low-power gas detector control system, the data processing module determines its abnormal time point according to the historical leakage time point of a single pipeline connection, determines the unit time period centered on the abnormal time point as the abnormal time period, and determines the absolute complement of the abnormal time period in the preset time period as the normal time period;

[0014] Among them, if the duration of a single normal time period is less than the preset value, the normal time period and the two adjacent abnormal time periods are merged into an abnormal time period.

[0015] As an optimal technical solution for the control system of a low-power gas detector, the data processing module determines the temperature average value and temperature standard deviation based on the historical temperature data corresponding to the normal time period to determine the temperature reference value, and determines the humidity average value and humidity standard deviation based on the historical humidity data corresponding to the normal time period to determine the humidity reference value;

[0016] Among them, the temperature reference value is the difference between the temperature average value and the temperature standard deviation, and the humidity reference value is the difference between the humidity average value and the humidity standard deviation.

[0017] As an optimal technical solution for the control system of a low-power gas detector, the data processing module determines the audio amplitude reference range according to the frequency range corresponding to the preset probability in the audio amplitude normal distribution diagram during the normal time period;

[0018] Among them, the abscissa of the audio amplitude normal distribution diagram is the audio signal intensity, and the ordinate of the audio amplitude normal distribution diagram is the probability.

[0019] As an optimal technical solution for the control system of a low-power gas detector, the operation matching module determines the working characterization state of the gas detector at the corresponding pipeline joint and the working response state of the sensor group according to the characteristic time period of a single pipeline joint, including,

[0020] If the characteristic time period is an abnormal time period, the gas detector at the corresponding pipeline joint is in the wake-up state and the working response state of the sensor group is to only collect temperature data, humidity data and flowing audio data;

[0021] If the characteristic time period is a normal time period, the gas detector at the corresponding pipeline joint is in the sleep state and the working response state of the sensor group is to collect temperature data, humidity data and flowing audio data, and control the data processing module to determine the temperature reference value and the humidity reference value;

[0022] Among them, the working characterization state includes the wake-up state and the sleep state.

[0023] As an optimal technical solution for the control system of a low-power gas detector, the operation matching module determines the leakage tendency of the corresponding pipeline joint based on the determination result that the gas detector at a single pipeline joint is in the sleep state, combined with the real-time temperature data and the real-time humidity data, including,

[0024] If the real-time temperature data is greater than or equal to the temperature reference value and the real-time humidity data is greater than or equal to the humidity reference value, it is determined that there is no leakage tendency at the corresponding pipeline joint;

[0025] If the real-time temperature data is less than the temperature reference value and the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage phenomenon at the corresponding pipeline joint and the corresponding gas detector is adjusted to the wake-up state.

[0026] As a preferred technical solution of the low-power gas detector control system, the operation matching module determines the leakage tendency of the pipeline connection according to the determination result that the gas detector at the single pipeline connection is in the sleep state, combined with the real-time temperature data and the real-time humidity data. It also includes,

[0027] If the real-time temperature data is less than the temperature reference value or the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage tendency at the corresponding pipeline connection and it is determined to analyze the flowing audio information.

[0028] As a preferred technical solution of the low-power gas detector control system, the operation matching module controls the data processing module to determine the audio amplitude reference range according to the judgment result of the existence of leakage tendency, and determines whether to change the working characterization state of the gas detector corresponding to the pipeline connection according to the real-time audio amplitude. Among them,

[0029] If the real-time audio amplitude is not within the audio amplitude reference range, it is determined that the gas detector corresponding to the pipeline connection is changed from the sleep state to the wake-up state;

[0030] If the real-time audio amplitude is within the audio amplitude reference range, it is determined not to change the working characterization state of the gas detector corresponding to the pipeline connection and keep it in the sleep state.

[0031] On the other hand, the present invention also provides a low-power gas detector control method, including,

[0032] Step S1, obtaining the historical leakage information of each pipeline connection, and determining the abnormal time point of the corresponding pipeline connection according to the historical leakage time point of each pipeline connection;

[0033] Step S2, determining the characteristic time period of the corresponding pipeline connection according to the abnormal time point;

[0034] Step S3, determining the working characterization state of the corresponding gas detector and the working response state of the corresponding sensor group according to the characteristic time period of each pipeline connection;

[0035] Step S4, determining the leakage tendency of the corresponding pipeline connection according to the determination result that the gas detector is in the sleep state, combined with the corresponding real-time temperature data and real-time humidity data, including,

[0036] If the real-time temperature data is greater than or equal to the temperature reference value and the real-time humidity data is greater than or equal to the humidity reference value, it is determined that there is no leakage at the corresponding pipeline connection;

[0037] If the real-time temperature data is less than the temperature reference value and the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage phenomenon at the corresponding pipeline connection and the corresponding gas detector is adjusted to the wake-up state;

[0038] If the real-time temperature data is less than the temperature reference value or the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage tendency at the corresponding pipeline connection and it is determined to analyze the flowing audio information;

[0039] Step S5, according to the judgment result of the leakage tendency, control the data processing module to determine the audio amplitude reference range, and determine whether to change the working characterization state of the gas detector corresponding to the pipeline connection according to the real-time audio amplitude, including,

[0040] If the real-time audio amplitude is not within the audio amplitude reference range, it is determined that the gas detector corresponding to the pipeline connection is changed from the sleep state to the wake state;

[0041] If the real-time audio amplitude is within the audio amplitude reference range, it is determined not to change the working characterization state of the gas detector corresponding to the pipeline connection and keep it in the sleep state.

[0042] Compared with the prior art, the beneficial effects of the present invention are:

[0043] The low-power gas detector control system provided by the present invention improves the monitoring accuracy, reduces the energy consumption of the gas detector through the complementary working mode between the gas detector and the sensor group, realizes highly customized monitoring and comprehensive data analysis, and is easy to expand and maintain each gas detector and each sensor in the system;

[0044] By combining historical leakage information, real-time temperature data, real-time humidity data and flowing audio information, the system of the present invention can more accurately judge the gas leakage risk at each pipeline connection of the hazardous gas transportation pipeline network, and according to the division of characteristic time periods and the determination of the audio amplitude reference range, the system can quickly and sensitively capture potential leakage events within each characteristic time period, thereby improving the accuracy and timeliness of early warning;

[0045] By intelligently adjusting the working characterization state of the gas detector and the working response state of the sensor group, the system of the present invention performs detailed monitoring only during necessary time periods, thereby reducing energy consumption while ensuring the monitoring effect. This dynamic adjustment strategy helps to extend the service life of the equipment and reduce energy consumption;

[0046] The present invention utilizes the operation matching module to conduct refined management and optimization of the working states of the gas detector and the sensor group within the characteristic time period at a single pipeline connection: By intelligently identifying the characteristic time period (abnormal or normal) at the pipeline connection, complementary and efficient management of the working states of the gas detector and the sensor group is achieved: The gas detector is awakened during the abnormal time period for real-time monitoring, while the sensor group is used to collect key temperature, humidity, and flow audio data to ensure that key information can be quickly captured when a potential leak occurs during the normal time period; during the normal time period, the gas detector enters the sleep state to reduce power consumption, and at this time, the sensor group undertakes the tasks of data collection and preliminary analysis, calculates the temperature reference value and the humidity reference value, and provides a basis for subsequent monitoring work; This complementary working mode not only effectively reduces the power consumption of the gas detector and extends the service life of the device, but also ensures the continuity and accuracy of the monitoring of harmful gas leaks;

[0047] The operation matching module of the present invention intelligently combines the sleep state of the gas detector, real-time temperature data, and real-time humidity data to achieve efficient and accurate determination of the tendency of harmful gas leaks: When both the real-time temperature and humidity data are not lower than their reference values, it can accurately determine that there is no leakage tendency at the pipeline connection, so as to maintain the sleep state of the gas detector to save power consumption; when both the real-time temperature and humidity data are lower than their reference values, the module can quickly identify potential leakage phenomena, immediately adjust the gas detector to the wake-up state for direct detection, and issue an alarm signal; This determination method not only improves the response speed and accuracy of the monitoring system, but also effectively reduces the risks of false alarms and missed alarms. At the same time, by promptly issuing an alarm signal and waking up the gas detector, the repair personnel can quickly understand the degree of leakage, so as to take measures for repair in a timely manner and avoid the further deterioration of the situation; This intelligent monitoring and determination method not only improves the efficiency of harmful gas leak monitoring, but also ensures the safe operation of the pipeline system;

[0048] By comprehensively considering various data and achieving intelligent determination and response, the operation matching module of the present invention not only improves the efficiency and accuracy of harmful gas leak monitoring, but also ensures the safe operation of the pipeline system, providing timely and accurate information support for the repair personnel. Description of the Drawings

[0049] Figure 1 It is a connection diagram of the low-power gas detector control system according to an embodiment of the present invention;

[0050] Figure 2 It is a working flow diagram of the operation matching module according to an embodiment of the present invention;

[0051] Figure 3 It is a step diagram of the method of the low-power gas detector control system according to an embodiment of the present invention. Detailed implementation manners

[0052] In order to make the objectives and advantages of the present invention clearer and more understandable, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0053] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0054] It should be noted that in the description of the present invention, the terms indicating the direction or positional relationship such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the direction or positional relationship shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0055] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0056] Please refer to Figure 1 as shown, which is the connection diagram of the low-power gas detector control system according to the embodiment of the present invention. The present invention provides a low-power gas detector control system, including:

[0057] A number of gas detectors for detecting the concentration of harmful gases at the joints of each pipeline in the harmful gas transportation pipeline network;

[0058] A data acquisition module, which is arranged at the joints of each pipeline in the harmful gas transportation pipeline network, includes an information storage unit for obtaining the historical leakage information of each pipeline joint, and a number of sensor groups for obtaining the temperature data, humidity data and flowing audio information of gas flow at each joint. The historical leakage information includes the historical leakage time point, historical temperature data, historical humidity data and historical flowing audio information;

[0059] A data processing module, which is connected to the data acquisition module, is used to divide a preset time period into several characteristic time periods according to the historical leakage information of a single pipeline connection, determine a temperature reference value and a humidity reference value according to the historical temperature data and historical humidity data of a single pipeline, construct a time-domain audio waveform diagram according to the flowing audio information to determine the amplitude normal distribution diagram of the normal time period, and determine the audio amplitude reference range according to the amplitude normal distribution diagram;

[0060] Among them, the characteristic time periods include abnormal time periods and normal time periods;

[0061] An operation matching module, which is respectively connected to each of the gas detectors, the data acquisition module and the data processing module, is used to determine the working characterization state of the gas detector at the corresponding pipeline connection and the working response state of the sensor group according to the characteristic time periods of a single pipeline connection, determine the leakage tendency according to the real-time temperature data and real-time humidity data of a single pipeline connection to determine whether to analyze the flowing audio information, and determine whether to change the working characterization state of the corresponding gas detector according to the leakage tendency and the real-time audio amplitude.

[0062] It can be understood that the low-power gas detector control system provided by the present invention re-determines the characteristic time periods every week and determines them jointly according to the historical leakage information of the past four weeks and the same week in the past two years; in one embodiment, when determining the characteristic time periods of the 21st week, it will be determined jointly according to the historical leakage information from the 17th week to the 20th week of this year, the historical leakage information of the 21st week of last year, and the historical leakage information of the 21st week of the year before last. All the historical leakage time points that existed in these weeks are determined as the abnormal time points of each day of this week; that is, after summarizing the historical leakage event points of these 6 weeks, they are all set as the abnormal time points within a day (00:00-24:00), then the abnormal time periods within a day are determined, then the normal time periods within a day are determined, and finally the working characterization states of the gas detectors are adjusted according to the same abnormal time periods and normal time periods for these 7 days.

[0063] In the implementation, the abnormal time points at each pipeline connection are determined only according to the historical leakage data of the corresponding six weeks at that pipeline connection to determine the normal time periods and abnormal time periods at that place; therefore, the working states of each pipeline connection may all be different.

[0064] Specifically, a sensor group is provided at each pipeline connection, and a single sensor group includes a temperature sensor, a humidity sensor and an audio sensor.

[0065] In the implementation, the temperature sensor, the humidity sensor and the audio sensor are all existing sensors.

[0066] It is understandable that the low-power gas detector control system provided by the present invention improves the monitoring accuracy, reduces the energy consumption of the gas detector through the complementary working mode between the gas detector and the sensor group, realizes highly customized monitoring and comprehensive data analysis, and is easy to expand and maintain each gas detector and each sensor in the system: (1) By combining historical leakage information, real-time temperature data, real-time humidity data and flowing audio information, the system can more accurately judge the gas leakage risk at each pipeline connection of the hazardous gas transportation pipeline network, and according to the division of characteristic time periods and the determination of the audio amplitude reference range, the system can quickly and sensitively capture potential leakage events within each characteristic time period, thereby improving the accuracy and timeliness of early warning; (2) The system intelligently adjusts the working characterization state of the gas detector and the working response state of the sensor group, and only conducts detailed monitoring during necessary time periods, thereby reducing energy consumption while ensuring the monitoring effect. This dynamic adjustment strategy helps to extend the service life of the equipment and reduce energy consumption; (3) The characteristic time periods at each pipeline connection are determined according to the specific historical leakage data at that place, which means that the system can be personalized for the uniqueness of each connection. This highly customized monitoring scheme helps to improve the pertinence and efficiency of monitoring; (4) The system not only considers the recent historical leakage information but also combines the data of the same time period in previous years, so as to be able to more comprehensively evaluate the leakage risk. This comprehensive data analysis method helps to discover potential periodic leakage patterns and provides strong support for the formulation of preventive measures; (5) A sensor group is arranged at each pipeline connection for easy acquisition and replacement. At the same time, the modular design of the system makes it simple and convenient to add new monitoring points or update equipment, which helps to maintain the continuity and reliability of the system.

[0067] Specifically, the data processing module determines the abnormal time point according to the historical leakage time point of a single pipeline connection, determines the unit time period centered on the abnormal time point as the abnormal time period within a day, and determines the absolute complement of the abnormal time period within a preset duration (within a day) as the normal time period;

[0068] Among them, if the duration of a single normal time period is less than the preset value, the normal time period and the two adjacent abnormal time periods are merged into one abnormal time period.

[0069] In implementation, the unit time period is usually 15 min to 30 min. The longer the unit time period is, the longer the wake-up state retention time of the gas detector is, and the shorter the unit time period is, the shorter the wake-up state retention time of the gas detector is. Usually, the unit time is set to 15 min to reduce its power consumption. Among them, if a certain abnormal time point repeats more than twice, it indicates that the leakage probability at this time point is high, then the unit time period corresponding to this time point is increased, usually set to 30 min. The preset value is usually set to 5 min. If the interval time between two abnormal time periods is less than 5 min, they are combined into one abnormal time period to avoid damage to the instrument caused by the frequent state change of the gas detector and the sensor group.

[0070] It can be understood that determining the abnormal time period according to the historical leakage time point can accurately identify the time period when leakage may exist at the pipeline connection, which helps to reduce false alarms and missed alarms and improve the monitoring efficiency; by reasonably setting the unit time period and extending it when necessary (for repeated leakage time points), it is possible to effectively control the wake-up state retention time of the gas detector while ensuring the monitoring accuracy, thereby reducing its power consumption and extending the service life of the equipment.

[0071] In implementation, if the nth abnormal time point is 02:15, then the corresponding abnormal time period is 02:08 - 02:23.

[0072] In implementation, if there are multiple adjacent abnormal time periods corresponding to overlapping time points, these abnormal time periods are all merged into one; in one implementation, the 4 overlapping abnormal time periods are 05:05 - 05:20, 05:12 - 05:27, 05:14 - 05:29, and 05:20 - 05:35 respectively, then the merged abnormal time period is 05:05 - 05:35.

[0073] It can be understood that by merging adjacent abnormal time periods with an interval time less than the preset value and overlapping abnormal time periods, the frequent state switching of the gas detector and the sensor group can be reduced, thereby reducing the risk of equipment damage due to frequent operations.

[0074] Specifically, the data processing module determines the temperature average value and the temperature standard deviation according to the historical temperature data corresponding to the normal time period to determine the temperature reference value, and determines the humidity average value and the humidity standard deviation according to the historical humidity data corresponding to the normal time period to determine the humidity reference value;

[0075] Among them, the temperature reference value is the difference between the temperature average value and the temperature standard deviation, and the humidity reference value is the difference between the humidity average value and the humidity standard deviation.

[0076] In implementation, the temperature reference value for the 21st week is calculated based on all historical temperature data corresponding to the normal time period calculated for the 21st week of this year within the 17th week to the 20th week of this year, the 21st week of last year, and the 21st week of the year before last; the humidity reference value for the 21st week is calculated based on all historical humidity data corresponding to the normal time period calculated for the 21st week of this year within the 17th week to the 20th week of this year, the 21st week of last year, and the 21st week of the year before last.

[0077] It can be understood that by calculating the average value and standard deviation of historical temperature data and humidity data within the normal time period and determining the temperature reference value and humidity reference value accordingly, the actual situation of the environment at the pipe connection can be more accurately reflected, which helps to more accurately judge whether there are abnormal situations in subsequent monitoring; by considering historical data within multiple time periods to determine the temperature reference value and humidity reference value, the information value of historical data can be fully utilized and the reliability and stability of the monitoring results can be improved.

[0078] Specifically, the data processing module determines the audio amplitude reference range according to the frequency range corresponding to the preset probability in the audio amplitude normal distribution diagram of the normal time period;

[0079] Among them, the audio amplitude is the amplitude of the audio signal / the audio amplitude, and the amplitude refers to the intensity of the audio signal; the abscissa of the audio amplitude normal distribution diagram is the audio signal intensity, and the ordinate of the audio amplitude normal distribution diagram is the probability.

[0080] In implementation, the larger the preset probability, the larger the audio amplitude reference range. If the preset probability is too small, the characteristics of the audio amplitude in the normal time period cannot be reflected. Therefore, the preset probability ≥ 90%, and preferably set to 95% to eliminate individual special audio amplitudes in the normal time period.

[0081] It can be understood that the data processing module can accurately determine the audio amplitude reference range based on the audio amplitude normal distribution diagram of the normal time period with a preset high probability (such as 95%), thereby significantly enhancing the ability to identify abnormal audio signals, reducing false alarms and missed alarms, improving the stability and reliability of the monitoring system, further optimizing the monitoring strategy, and at the same time improving the intelligent level of the data processing module to ensure the efficiency, accuracy and reliability of the leakage monitoring at the pipe connection.

[0082] Please refer to Figure 2 As shown, it is the working flowchart of the operation matching module in the embodiment of the present invention. Specifically, the operation matching module determines the working characterization state of the gas detector and the working response state of the sensor group corresponding to the pipe connection according to the characteristic time period of a single pipe connection, including,

[0083] If the characteristic time period is an abnormal time period, the gas detector at the corresponding pipeline connection is in the wake-up state, and the working response state of the sensor group is to only collect temperature data, humidity data, and flowing audio data;

[0084] If the characteristic time period is a normal time period, the gas detector at the corresponding pipeline connection is in the sleep state, and the working response state of the sensor group is to collect temperature data, humidity data, and flowing audio data, and control the data processing module to determine a temperature reference value and a humidity reference value;

[0085] Among them, the working characterization state includes the wake-up state and the sleep state.

[0086] In implementation, the working states of the gas detector and the sensor group are complementary. When the gas detector is working (wake-up state), the sensor group only collects the corresponding temperature data, humidity data, and flowing audio data, but does not analyze these data; when the gas detector is not working (sleep state), the sensor group needs to collect temperature data, humidity data, and flowing audio data, and also needs to analyze the temperature data and the read data, but still does not need to analyze the flowing audio data at this time; such a complementary working state can reduce the power consumption of the gas detector and ensure the monitoring of the leakage of harmful gases.

[0087] It can be understood that the operation matching module finely manages and optimizes the working states of the gas detector and the sensor group within the characteristic time period of a single pipeline connection: by intelligently identifying the characteristic time period (abnormal or normal) of the pipeline connection, the complementary and efficient management of the working states of the gas detector and the sensor group is realized: the gas detector is awakened in the abnormal time period for real-time monitoring, and the sensor group is used to collect key temperature, humidity, and flowing audio data to ensure that key information can be quickly captured when a potential leakage occurs in the normal time period; while in the normal time period, the gas detector enters the sleep state to reduce power consumption, and at this time the sensor group undertakes the tasks of data collection and preliminary analysis, calculates the temperature reference value and the humidity reference value, and provides a benchmark for subsequent monitoring work; this complementary working mode not only effectively reduces the power consumption of the gas detector and prolongs the service life of the equipment, but also ensures the continuity and accuracy of the monitoring of harmful gas leakage.

[0088] It can be understood that the harmful gases in the present invention include liquefied petroleum gas, hydrogen sulfide, liquid ammonia, and liquid nitrogen.

[0089] It can be understood that the main components of liquefied petroleum gas (LPG) are propane (C3H8) and butane (C4H 10) If liquefied petroleum gas leaks, it will quickly vaporize (the vaporization process is an endothermic process), which will lower the temperature of the surrounding environment; and LPG itself does not contain water vapor, and it will dilute the water vapor content in the surrounding air during the vaporization process to reduce the humidity; therefore, in practice, if liquefied petroleum gas leaks, the temperature and humidity of the surrounding area will both drop.

[0090] It can be understood that when hydrogen sulfide gas leaks from a high-pressure environment to a low-pressure environment, the gas will expand (similar to an adiabatic expansion process), and according to the Joule-Thomson effect, the gas will absorb the heat of the surrounding environment during the expansion process; therefore, when hydrogen sulfide continuously leaks, it will cause the temperature at the pipe connection to drop; hydrogen sulfide has strong water solubility and is easily soluble in water to form hydrosulfuric acid, so when hydrogen sulfide leaks, it will react with the water vapor in the air to dissolve and thus reduce the humidity at the pipe connection.

[0091] It can be understood that after liquid ammonia leaks, it will quickly vaporize (an endothermic process). According to the principle of heat of vaporization, liquid ammonia needs to absorb a large amount of heat to overcome the intermolecular force to complete the state transformation, and this heat is mainly obtained from the surrounding environment, so it will cause the temperature of the surrounding environment to drop; ammonia is an alkaline gas and will react with the water vapor in the air to form ammonia monohydrate, and this reaction will consume the water vapor in the surrounding environment to reduce the humidity.

[0092] It can be understood that the boiling point of liquid nitrogen is very low. When liquid nitrogen leaks, it will quickly vaporize, change from liquid to gas and need to absorb a large amount of heat. The heat absorbed by the vaporization of liquid nitrogen comes from the surrounding environment, resulting in a sharp drop in the temperature of the surrounding environment; nitrogen itself is an inert gas and does not chemically react with water, but due to the sharp drop in temperature, the water vapor in the air will quickly condense into small water droplets or directly sublime into ice crystals (this is because the decrease in temperature greatly weakens the ability of air to hold water vapor, the saturated water vapor pressure decreases, resulting in the transformation of water vapor from gas state to liquid or solid state, thus reducing the humidity), and at the same time, the newly formed liquid water or ice crystals may adhere to the surface of surrounding objects, further reducing the water vapor content in the air.

[0093] Specifically, the operation matching module determines the leakage tendency of the pipe connection according to the determination result that the gas detector at a single pipe connection is in the sleep state, combined with the real-time temperature data and real-time humidity data, including,

[0094] If the real-time temperature data is greater than or equal to the temperature reference value and the real-time humidity data is greater than or equal to the humidity reference value, it is determined that there is no leakage tendency at the corresponding pipe connection; when both the real-time humidity data and the real-time temperature data are greater than or equal to their respective reference values, it can be directly judged that there is no leakage, so the sleep state of the gas detector is maintained, and the temperature data and humidity data are continuously monitored;

[0095] If the real-time temperature data is less than the temperature reference value and the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage at the corresponding pipe connection, and the corresponding gas detector is adjusted to the wake-up state; when both the real-time humidity data and the real-time temperature data are lower than their respective reference values, it can be directly judged that a leakage has occurred, so an alarm signal is sent and the gas detector is directly adjusted to the wake-up state for direct detection, so that the repair personnel can quickly understand the degree of leakage.

[0096] It can be understood that the operation matching module intelligently combines the sleep state of the gas detector, the real-time temperature data, and the real-time humidity data to achieve an efficient and accurate determination of the tendency of harmful gas leakage: when both the real-time temperature and humidity data are not lower than their reference values, it can be accurately judged that there is no leakage tendency at the pipe connection, so as to keep the gas detector in the sleep state to save power consumption; while when both the real-time temperature and humidity data are lower than their reference values, the module can quickly identify the potential leakage phenomenon, immediately adjust the gas detector to the wake-up state for direct detection, and send an alarm signal; this determination method not only improves the response speed and accuracy of the monitoring system, but also effectively reduces the risks of false alarms and missed alarms. At the same time, by sending an alarm signal in time and waking up the gas detector, the repair personnel can quickly understand the degree of leakage, so as to take measures for repair in time and avoid the further deterioration of the situation; this intelligent monitoring and determination method not only improves the efficiency of harmful gas leakage monitoring, but also ensures the safe operation of the pipeline system.

[0097] Specifically, the operation matching module determines the leakage tendency of the corresponding pipe connection according to the determination result that the gas detector at a single pipe connection is in the sleep state, in combination with the real-time temperature data and the real-time humidity data. It also includes,

[0098] If the real-time temperature data is less than the temperature reference value or the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage tendency at the corresponding pipe connection and it is determined to analyze the flowing audio information; when one of the real-time humidity data or the real-time temperature data is lower than its corresponding reference value, it is impossible to judge whether a leakage has really occurred, and it only indicates that there is a leakage tendency at this pipe connection. Therefore, it is necessary to analyze the flowing audio information to determine whether there is really a leakage phenomenon.

[0099] It can be understood that when the real-time temperature or humidity data is lower than its reference value, the operation matching module can quickly identify the potential leakage tendency and start the analysis of the flowing audio information to further confirm whether there is a leakage phenomenon.

[0100] It is understandable that when oil and gas start to leak initially, if the leakage opening is small, the sound generated by the fluid at the leakage point may be relatively weak; at this time, in the flowing audio data, the audio amplitude will show a small increase; this is because when oil and gas leak from a high-pressure environment to a low-pressure environment, certain turbulence and friction will be generated, thus emitting sounds, and these sounds will cause the amplitude of the audio signal to rise to a certain extent above the background noise. As the leakage opening expands or the leakage speed increases, for example, when a large amount of oil and gas leaks due to a pipeline rupture, the flow velocity and turbulence degree of the fluid will increase significantly. In this case, the audio amplitude will increase sharply because a larger flow rate and higher flow velocity will generate stronger vibrations and sounds. At this time, the sound generated by the oil and gas leakage may change from a slight "hissing" sound to a strong "whistling" or "roaring" sound, and its audio amplitude will be much higher than the normal level and may exhibit frequent peaks. Therefore, in implementation, when there is a leakage tendency, it is possible to determine whether there is a leakage through the audio amplitude.

[0101] Specifically, the operation matching module controls the data processing module to determine the audio amplitude reference range according to the judgment result of the leakage tendency, and determines whether to change the working characterization state of the gas detector corresponding to the pipeline connection according to the real-time audio amplitude, where

[0102] If the real-time audio amplitude is not within (exceeds) the audio amplitude reference range, it is determined to change the gas detector corresponding to the pipeline connection from the sleep state to the wake-up state; at this time, it indicates that the audio amplitude exceeds the normal standard, because gas leakage causes the audio amplitude to increase, so at this time, the gas detector needs to be adjusted to the wake-up state, and it also indicates that one of the humidity sensor or temperature sensor is not sensitive enough (in the leakage tendency, if the real-time humidity data is greater than or equal to the humidity reference value, the insensitive one is the humidity sensor, and in the leakage tendency, if the real-time temperature data is greater than or equal to the temperature reference value, the insensitive one is the temperature sensor). Therefore, it is necessary to repair the insensitive humidity sensor / temperature sensor, and at the same time, an alarm signal needs to be sent at the corresponding pipeline connection.

[0103] If the real-time audio amplitude is within the audio amplitude reference range, it is determined not to change the working characterization state of the gas detector corresponding to the pipeline connection and keep it in the sleep state; at this time, it indicates that the audio amplitude does not exceed the normal standard, so there is no gas leakage. Therefore, at this time, the gas detector is still kept in the sleep state, and it also indicates that one of the humidity sensor or temperature sensor has a problem (in the leakage tendency, if the real-time humidity data is less than the humidity reference value, the insensitive one is the humidity sensor, and in the leakage tendency, if the real-time temperature data is less than the temperature reference value, the insensitive one is the temperature sensor). Therefore, it is necessary to repair the corresponding humidity sensor / temperature sensor.

[0104] It is understandable that during the audio analysis stage, the change in audio amplitude is used to accurately judge the leakage situation. When the audio amplitude exceeds the normal range, the gas detector is immediately awakened for direct detection, and an alarm signal is issued at the same time, enabling the emergency repair personnel to quickly understand the degree of leakage and take measures. In addition, the operation matching module can also intelligently evaluate the sensitivity of the humidity sensor or temperature sensor according to the change in audio amplitude: when the audio amplitude exceeds the normal range while the temperature or humidity data does not reach the leakage standard, it can accurately identify the sensor that needs to be repaired and prompt for repair. This intelligent sensor evaluation and repair prompt not only improves the stability and reliability of the monitoring system but also reduces the risk of misjudgment caused by sensor failures.

[0105] Please refer to Figure 3 as shown, which is the step diagram of the low-power gas detector control system method of the embodiment of the present invention. The embodiment of the present invention also provides a low-power gas detector control system method, including,

[0106] Step S1, obtain the historical leakage information of each pipeline connection, and determine the abnormal time point of the corresponding pipeline connection according to the historical leakage time point of each pipeline connection;

[0107] Step S2, determine the characteristic time period of the corresponding pipeline connection according to the abnormal time point;

[0108] Step S3, determine the working characterization state of the corresponding gas detector and the working response state of the corresponding sensor group according to the characteristic time period of each pipeline connection;

[0109] Step S4, determine the leakage tendency of the corresponding pipeline connection according to the determination result that the gas detector is in the sleep state combined with the corresponding real-time temperature data and real-time humidity data, including,

[0110] If the real-time temperature data is greater than or equal to the temperature reference value and the real-time humidity data is greater than or equal to the humidity reference value, it is determined that there is no leakage at the corresponding pipeline connection;

[0111] If the real-time temperature data is less than the temperature reference value and the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage phenomenon at the corresponding pipeline connection and the corresponding gas detector is adjusted to the wake-up state;

[0112] If the real-time temperature data is less than the temperature reference value or the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage tendency at the corresponding pipeline connection and it is determined to analyze the flowing audio information;

[0113] Step S5, based on the determination result of the leakage tendency, control the data processing module to determine the audio amplitude reference range, and determine whether to change the working characterization state of the gas detector corresponding to the pipeline connection according to the real-time audio amplitude, including,

[0114] If the real-time audio amplitude is not within the audio amplitude reference range, it is determined to change the gas detector corresponding to the pipeline connection from the sleep state to the wake-up state;

[0115] If the real-time audio amplitude is within the audio amplitude reference range, it is determined not to change the working characterization state of the gas detector corresponding to the pipeline connection and keep it in the sleep state.

[0116] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or replacements to the relevant technical features, and the technical solutions after these changes or replacements will fall within the protection scope of the present invention.

[0117] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-power gas detector control system, characterized in that: include: A number of gas detectors for detecting the concentration of hazardous gases at the joints of the hazardous gas transportation pipeline network; A data acquisition module is provided at each pipeline connection of the hazardous gas transportation pipeline network, and includes an information storage unit for obtaining historical leakage information of each pipeline connection, and a plurality of sensor groups for obtaining temperature data, humidity data and flow audio information of gas flow at each connection, wherein the historical leakage information includes historical leakage time points, historical temperature data, historical humidity data and historical flow audio information; a data processing module connected to the data acquisition module, for dividing a preset time length into a plurality of characteristic time periods according to the historical leakage information at a single pipe connection, determining a temperature reference value and a humidity reference value according to the historical temperature data and the historical humidity data of the single pipe, constructing a time domain audio waveform diagram according to the flow audio information to determine a normal distribution diagram of the sound amplitude in a normal time period, and determining a reference range of the audio amplitude according to the normal distribution diagram of the sound amplitude; Wherein, the characteristic time period includes an abnormal time period and a normal time period; A matching module is run, which is respectively connected to each of the gas detectors, the data acquisition module and the data processing module, to determine the working characterization state of the gas detector at the corresponding pipeline connection and the working response state of the sensor group according to the characteristic time period at the single pipeline connection, to determine the leakage tendency according to the real-time temperature data and real-time humidity data at the single pipeline connection to determine whether to analyze the flow audio information, and to determine whether to change the working characterization state of the corresponding gas detector according to the leakage tendency and the real-time audio amplitude.

2. The low-power gas detector control system according to claim 1 is characterized in that: A sensor group is arranged at each pipeline connection, and a single sensor group includes a temperature sensor, a humidity sensor and an audio sensor.

3. The low-power gas detector control system according to claim 1 is characterized in that: The data processing module determines the abnormal time point according to the historical leakage time point of a single pipeline connection, determines the unit time period centered on the abnormal time point as the abnormal time period, and determines the absolute complement of the abnormal time period within a preset time length as the normal time period; If the duration of a single normal time period is less than a preset value, the normal time period and two adjacent abnormal time periods are combined into one abnormal time period.

4. The low-power gas detector control system according to claim 1 is characterized in that: The data processing module determines the temperature average value and the temperature standard deviation according to the historical temperature data corresponding to the normal time period to determine the temperature reference value, and determines the humidity average value and the humidity standard deviation according to the historical humidity data corresponding to the normal time period to determine the humidity reference value; The temperature reference value is the difference between the temperature average and the temperature standard deviation, and the humidity reference value is the difference between the humidity average and the humidity standard deviation.

5. The low-power gas detector control system according to claim 1 is characterized in that: The data processing module determines the audio amplitude reference range according to the frequency range corresponding to the preset probability in the normal distribution diagram of the audio amplitude in the normal time period; The horizontal coordinate of the normal distribution diagram of the sound amplitude is the audio signal strength, and the vertical coordinate of the normal distribution diagram of the sound amplitude is the probability.

6. The low-power gas detector control system according to claim 1 is characterized in that: The operation matching module determines the working characterization state of the gas detector at the corresponding pipeline connection and the working response state of the sensor group according to the characteristic time period at the single pipeline connection, including: If the characteristic time period is an abnormal time period, the gas detector at the corresponding pipeline connection is in an awake state and the working response state of the sensor group is to collect only temperature data, humidity data and flow audio data; If the characteristic time period is a normal time period, the gas detector at the corresponding pipeline connection is in a dormant state and the working response state of the sensor group is to collect temperature data, humidity data and flow audio data, and control the data processing module to determine the temperature reference value and the humidity reference value; The working characteristic state includes a wake-up state and a sleep state.

7. The low-power gas detector control system according to claim 6 is characterized in that: The operation matching module determines the leakage tendency of the pipeline connection according to the determination result that the gas detector at the single pipeline connection is in the dormant state, combined with the real-time temperature data and the real-time humidity data, including: If the real-time temperature data is greater than or equal to the temperature reference value and the real-time humidity data is greater than or equal to the humidity reference value, it is determined that there is no leakage tendency at the corresponding pipeline connection; If the real-time temperature data is less than the temperature reference value and the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage at the corresponding pipeline connection and the corresponding gas detector is adjusted to the awakening state.

8. The low-power gas detector control system according to claim 7, characterized in that: The operation matching module determines the leakage tendency of the pipeline connection according to the determination result that the gas detector at the single pipeline connection is in the dormant state, combined with the real-time temperature data and the real-time humidity data, and also includes: If the real-time temperature data is less than the temperature reference value or the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage tendency at the corresponding pipeline connection and it is determined to analyze the flow audio information.

9. The low-power gas detector control system according to claim 8, characterized in that: The operation matching module controls the data processing module to determine the audio amplitude reference range according to the judgment result of the presence of leakage tendency, and determines whether to change the working characterization state of the gas detector corresponding to the pipeline connection according to the real-time audio amplitude, wherein: If the real-time audio amplitude is not within the audio amplitude reference range, it is determined that the gas detector corresponding to the pipeline connection is changed from a dormant state to an awakened state; If the real-time audio amplitude is within the audio amplitude reference range, it is determined that the working characteristic state of the gas detector corresponding to the pipeline connection is not changed so that it remains in a dormant state.

10. A low-power gas detector control system method applied to the low-power gas detector control system according to any one of claims 1 to 9, characterized in that: include, Step S1, obtaining historical leakage information of each pipeline connection, and determining the abnormal time point of the corresponding pipeline connection according to the historical leakage time point of each pipeline connection; Step S2, determining a characteristic time period corresponding to the pipeline connection point according to the abnormal time point; Step S3, determining the working characterization state of the corresponding gas detector and the working response state of the corresponding sensor group according to the characteristic time period at each pipeline connection; Step S4, determining the leakage tendency of the corresponding pipeline connection according to the determination result that the gas detector is in the dormant state in combination with the corresponding real-time temperature data and real-time humidity data, including: If the real-time temperature data is greater than or equal to the temperature reference value and the real-time humidity data is greater than or equal to the humidity reference value, it is determined that there is no leakage at the corresponding pipeline connection; If the real-time temperature data is less than the temperature reference value and the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage at the corresponding pipeline connection and the corresponding gas detector is adjusted to the awakening state; If the real-time temperature data is less than the temperature reference value or the real-time humidity data is less than the humidity reference value, it is determined that there is a leakage tendency at the corresponding pipeline connection and the flow audio information is analyzed; Step S5, controlling the data processing module to determine the audio amplitude reference range according to the judgment result of the presence of leakage tendency, and determining whether to change the working characterization state of the gas detector corresponding to the pipeline connection according to the real-time audio amplitude, including: If the real-time audio amplitude is not within the audio amplitude reference range, it is determined that the gas detector corresponding to the pipeline connection is changed from a dormant state to an awakened state; If the real-time audio amplitude is within the audio amplitude reference range, it is determined that the working characteristic state of the gas detector corresponding to the pipeline connection is not changed so that it remains in a dormant state.

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