WO2021136450A1

WO2021136450A1 - Leakage traceability method and apparatus for indoor volatile substance

Info

Publication number: WO2021136450A1
Application number: PCT/CN2020/141788
Authority: WO
Inventors: 周成龙; 陈涛; 陈雷; 袁宏永; 苏国锋
Original assignee: 北京辰安科技股份有限公司; 清华大学; 北京维禹特科技发展有限公司
Priority date: 2019-12-31
Filing date: 2020-12-30
Publication date: 2021-07-08
Also published as: CN111157680B; CN111157680A

Abstract

A leakage traceability method and apparatus for an indoor volatile substance. The method comprises: acquiring volatile substance information at each indoor monitoring point, the volatile substance information comprising concentration information of at least one component of the volatile substance at each collection time point (S101); for each monitoring point, determining a concentration increase time period of the at least one component according to the volatile substance information of the monitoring point, the concentration increase time period being a time period that meets a preset increase condition (S102); for each component in the at least one component, according to the concentration increase time period of each component at each monitoring point, determining a time vector sequence and amplitude vector sequence corresponding to the component, wherein the time vector sequence is a sequence obtained by sorting in ascending order the monitoring points according to a starting time point of the concentration increase time period, and the amplitude vector sequence is a sequence obtained by sorting in descending order the monitoring points according to the concentration information in the concentration increase time period (S103); and according to the time vector sequence and amplitude vector sequence corresponding to the components, determining whether a component has leaked, and a leakage point and leakage time point of the component (S104).

Description

Leakage traceability method and device of indoor volatile substances

Cross-references to related applications

This disclosure requires that Beijing Chenan Technology Co., Ltd., Tsinghua University, Beijing Weiyute Technology Development Co., Ltd. submitted on December 31, 2019, with the title of “Indoor Volatile Substance Leakage Traceability Method and Device”, China Priority of patent application number "201911421482.7".

Technical field

The present disclosure relates to the field of data processing technology, and in particular to a method and device for leaking and tracing indoor volatile substances.

Background technique

At present, the leak detection method for indoor volatile substances is to use the leak detection and repair technology (Leak Detection And Repair, LDAR) proposed by the U.S. Environmental Protection Agency to detect and obtain leak points. The above method has the following two shortcomings: one is that it is difficult to find leakage problems in time by adopting a regular detection method; the other is that it is necessary to manually carry a detection instrument to inspect potential leaks, which has high labor costs and poor detection efficiency.

Summary of the invention

The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

To this end, the first purpose of the present disclosure is to propose a method for tracing indoor volatile substances leakage, which is used to solve the problems of difficulty in detecting leakage in time, high labor cost, and poor detection efficiency in the prior art.

The second purpose of the present disclosure is to provide a leak source tracing device for indoor volatile substances.

The third purpose of the present disclosure is to propose an electronic device.

The fourth objective of the present disclosure is to provide a computer-readable storage medium.

In order to achieve the above objectives, the first aspect of the present disclosure provides a method for tracing indoor volatile substances leakage, including: obtaining volatile substance information at various indoor monitoring points, and the volatile substance information includes: The concentration information of at least one component at each collection time point; for each monitoring point, the concentration increase time period of the at least one component is determined according to the volatile substance information of the monitoring point; the concentration increase time period is The time period that meets the preset rising condition; for each component in the at least one component, the time vector sequence and amplitude vector corresponding to each component are determined according to the concentration rising time period of the component at each monitoring point Sequence; the time vector sequence is a sequence obtained by sorting the monitoring points in ascending order according to the starting time point of the concentration increase time period; the amplitude vector sequence is the detection of each detection point according to the concentration information in the concentration increase time period Point sequence obtained by sorting in descending order; according to the time vector sequence and amplitude vector sequence corresponding to the component, it is determined whether the component has leakage and the leakage point and the leakage time point of the component.

In the indoor volatile substance leakage traceability method of the embodiment of the present disclosure, the volatile substance information of each monitoring point in the room is obtained. The volatile substance information includes: the concentration information of at least one component of the volatile substance at each collection time point; According to the volatile substance information of the monitoring points, determine the concentration increase time period of at least one component; the concentration increase time period is the time period that meets the preset increase condition; for each component in at least one component, Determine the time vector sequence and amplitude vector sequence corresponding to each component according to the concentration increase time period of each component at each monitoring point; the time vector sequence is to sort the monitoring points in ascending order according to the starting time point of the concentration increase time period The obtained sequence; the amplitude vector sequence is the sequence obtained by sorting the detection points in descending order according to the concentration information in the time period of concentration increase; according to the time vector sequence and amplitude vector sequence corresponding to the component, determine whether the component has leakage and the component The leakage point and time point of the leakage can be avoided, so as to avoid manual participation, reduce labor costs, and can detect and trace the source of the leakage problem in time, and improve the detection efficiency.

In order to achieve the above objective, an embodiment of the second aspect of the present disclosure proposes an indoor volatile substance leakage traceability device, including: an acquisition module for acquiring volatile substance information at various indoor monitoring points, where the volatile substance information includes : The concentration information of at least one component of the volatile substance at each collection time point; the first determining module is configured to determine the concentration increase of the at least one component according to the volatile substance information of the monitoring point for each monitoring point High time period; the concentration increase time period is a time period that satisfies the preset increase condition; the second determination module is used for each component in the at least one component, according to the component at each monitoring point Concentration rise time period, determine the time vector sequence and amplitude vector sequence corresponding to each component; the time vector sequence is a sequence obtained by sorting each monitoring point in ascending order according to the starting time point of the concentration rise time period; The amplitude vector sequence is a sequence obtained by sorting the detection points in descending order according to the concentration information in the concentration increase time period; the third determining module is used to determine the time vector sequence and the amplitude vector sequence corresponding to the component Whether there is leakage of the component and the leakage point and time point of the component.

The indoor volatile substance leakage traceability device of the embodiment of the present disclosure obtains the volatile substance information of each monitoring point in the room. The volatile substance information includes: the concentration information of at least one component of the volatile substance at each collection time point; According to the volatile substance information of the monitoring points, determine the concentration increase time period of at least one component; the concentration increase time period is the time period that meets the preset increase condition; for each component in at least one component, Determine the time vector sequence and amplitude vector sequence corresponding to each component according to the concentration increase time period of each component at each monitoring point; the time vector sequence is to sort the monitoring points in ascending order according to the starting time point of the concentration increase time period The obtained sequence; the amplitude vector sequence is the sequence obtained by sorting the detection points in descending order according to the concentration information in the time period of concentration increase; according to the time vector sequence and amplitude vector sequence corresponding to the component, determine whether the component has leakage and the component The leakage point and time point of the leakage can be avoided, so as to avoid manual participation, reduce labor costs, and can detect and trace the source of the leakage problem in time, and improve the detection efficiency.

To achieve the above objective, an embodiment of the third aspect of the present disclosure proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the program, To achieve the above-mentioned indoor volatile substance leakage traceability method.

In order to achieve the above objective, an embodiment of the fourth aspect of the present disclosure proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the indoor volatile substance leakage traceability method as described above is realized.

The additional aspects and advantages of the present disclosure will be partially given in the following description, and some will become obvious from the following description, or be understood through the practice of the present disclosure.

Description of the drawings

The above and/or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic flowchart of a method for tracing the source of leakage of indoor volatile substances according to an embodiment of the present disclosure;

Figure 2 is a schematic diagram of a concentration curve corresponding to at least one component;

Figure 3 is a schematic diagram of the comparison between the concentration curve after noise reduction and moving average filtering processing and the concentration curve before processing;

Figure 4 is a schematic diagram of the comparison between the concentration curve of the isomers before the merging and the concentration curve of the isomers after the merging;

Figure 5 is a schematic diagram of the time period of concentration increase;

FIG. 6 is a schematic flowchart of another method for tracing the source of leakage of indoor volatile substances provided by an embodiment of the present disclosure;

FIG. 7 is a schematic flow chart of another leak traceability method for indoor volatile substances provided by an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of an indoor volatile substance leakage traceability device provided by an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of an electronic device provided by an embodiment of the disclosure.

Detailed ways

The embodiments of the present disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present disclosure, but should not be construed as limiting the present disclosure.

The method and device for tracing indoor volatile substances leakage in the embodiments of the present disclosure will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic flow chart of a method for tracing the source of leakage of indoor volatile substances provided by an embodiment of the present disclosure. As shown in Figure 1, it mainly includes the following steps:

S101. Obtain volatile substance information at each monitoring point in the room, where the volatile substance information includes: concentration information of at least one component of the volatile substance at each collection time point.

The indoor volatile substance leakage traceability method provided in the present disclosure is executed by an indoor volatile substance leakage traceability device. The indoor volatile substance leakage traceability device may specifically be a hardware device or software installed in the hardware device. Among them, the hardware device may be, for example, a terminal device, a server, and the like.

In the present disclosure, indoor areas where volatile substances are likely to leak, such as a pump room in a chemical park. Among them, the components of volatile substances are, for example, benzene, toluene, carbon five or pentane and the like.

In this disclosure, the volatile substance information of each monitoring point is collected by a mass spectrometer. In the case of volatile substance information collected by the mass spectrometer, due to the measurement problems of the mass spectrometer itself and the characteristics of indoor leakage, the volatile substance concentration information measured in the pump room and other indoor spaces will show discrete points, oscillations, and the same differentiation. Problems such as incorrect separation of the structure. Therefore, the process of performing step 101 by the indoor volatile substance leakage traceability device may specifically be to obtain the volatile substance information collected by the mass spectrometer at each monitoring point in the room; according to the concentration of at least one component of the volatile substance at each collection time point Information, generate a concentration curve corresponding to at least one component; perform noise reduction, moving average filtering, and isomer merging on the concentration curve corresponding to at least one component to obtain volatile substance information at each monitoring point. Wherein, the schematic diagram of the concentration curve corresponding to at least one component may be as shown in FIG. 2.

In this disclosure, the concentration curve is also referred to as a concentration signal. Among them, the noise reduction is the signal average noise reduction of the concentration signal. For example, for a segment of mass spectrometer concentration signal I, its average value is

The standard deviation is σ, and the noise reduction benchmark is set to S _{dn to} determine whether the concentration value at each moment is within

If it exceeds this range, set the point to the corresponding evaluation standard range threshold. The original value V of each point of the concentration signal I is Vdn obtained after noise reduction processing.

In the present disclosure, the moving average filter can be regarded as the average value of the value of the variable in the past period of time. Compared with the direct assignment of the variable, the value obtained by the moving average is smoother on the image, and the jitter is less. A certain abnormal value makes the moving average fluctuate greatly. It has a good inhibitory effect on periodic interference, has high smoothness, and is suitable for high-frequency oscillation systems. As shown in FIG. 3, it is a schematic diagram of the comparison between the concentration curve after the noise reduction and the moving average filtering process and the concentration curve before the process. Among them, the curve with large fluctuation is the concentration curve before treatment, and the curve with small fluctuation is the concentration curve after treatment.

In this disclosure, it is difficult for the mass spectrometer to accurately separate isomers such as n/isopentane (C5H12), n/isohexane (C6H14), and n/isoheptane (C7H16), which is reflected in the concentration signal It is the mutation point where the group of isomers exist in the same time, but the sum of the two components has no mutation. This separation error causes great interference to the signal processing. In response to this problem, the present disclosure combines the concentration signals of the isomers to eliminate the interference caused by the separation error of the group of isomers. As shown in Figure 4, it is a schematic diagram of the comparison of the concentration curve of the isomers before the merging and the concentration curve of the isomers after the merging. Among them, the curve at the top of FIG. 4 is the concentration curve after the isomers are combined; the two curves at the bottom of FIG. 4 are the concentration curves before the isomers are combined.

S102. For each monitoring point, determine the concentration increase time period of at least one component according to the volatile substance information of the monitoring point; the concentration increase time period is a time period that meets a preset increase condition.

In the present disclosure, the preset increase condition may be that the number of time points in which the concentration information continuously rises is greater than or equal to the first number threshold, and the number of time points in which the concentration information continues to fall is less than or equal to the second number threshold, and the increment of the concentration information is greater than The time period equal to the first incremental threshold. Wherein, the first number threshold is greater than the second number threshold.

In the present disclosure, after the leakage starts, the concentration information of the adjacent monitoring points gradually rises, and the rising process is a continuous oscillating rise. Therefore, when determining the time period for the concentration increase, it is necessary to clarify the number and size of the time points of the continuous increase and to be fault-tolerant for the falling phase of the shock. For example, use

Represents the concentration information of component n at the i-th monitoring point at time m,

Indicates a period of time during which the concentration of component n at the i-th monitoring point increases at time m. Default condition is increased, the rise time points from the number of consecutive S _n is larger than the initial time point T _S, T to an end time point of the delta is greater than the density information is equal to _e S _A, and wherein the number of consecutive points fall time is less than S The time period of _m. Wherein, T _s represents the initial rise time period; T _e represents a rise time period end point; S _n represents a first threshold number; S _m represents a second threshold number; S _a represents a first increment threshold.

Correspondingly, in the present disclosure, the process of performing step 102 for the leakage traceability of indoor volatile substances may specifically be: for each component of each monitoring point, obtaining the concentration information of the component at any two adjacent collection time points; adjacent; The collection time points include: the first collection time point and the second collection time point, the first collection time point is less than the second collection time point; the difference between the concentration information at the second collection time point and the concentration information at the first collection time point When it is greater than 0, the second collection time point is marked incrementally; when the difference between the concentration information at the second collection time point and the concentration information at the first collection time point is less than or equal to 0, the second collection time point is decremented Mark, generate the mark sequence corresponding to the component; judge whether there is a continuous first number of incremental marks in the incremental mark sequence; when there is a continuous first number of incremental marks in the incremental mark sequence, the first number will be consecutive The time point of the first increment mark in the threshold increment mark is determined as the start time point of the concentration increase time period; after the start time point in the increment mark sequence is judged, whether there is a continuous second number of thresholds Decrement mark; when there is a continuous second number threshold decrement mark after the start time point in the increment mark sequence, the time point of the last decrement mark in the second consecutive second number threshold decrement mark is determined as the concentration The end time point of the rising time period; it is judged whether the concentration information increment of the concentration rising time period determined according to the start time point and the end time point is greater than or equal to the first increment threshold; when the start time point and the end time point are based on When the concentration information increase in the determined concentration increase time period is greater than or equal to the first increase threshold, the determined concentration increase time period is taken as the concentration increase time period of the component. Wherein, the schematic diagram of the concentration increase time period may be as shown in FIG. 5, for example.

In addition, if there is no decrement mark of the second consecutive number threshold until the end of the increment mark sequence, the time point of the last mark at the end of the increment mark sequence is determined as the end time point.

In the present disclosure, not every component has a time period for increasing the concentration. When according to the volatile substance information of the monitoring point, the time period for the concentration increase of a certain component is not determined, it is determined that the component has not leaked, and there is no need to trace the source.

S103. For each component in at least one component, determine the time vector sequence and the amplitude vector sequence corresponding to each component according to the concentration increase time period of the component at each monitoring point; the time vector sequence is according to the concentration increase time period The sequence is obtained by sorting each monitoring point in ascending order at the starting time point; the amplitude vector sequence is a sequence obtained by sorting each detection point in descending order according to the concentration information in the concentration increase time period.

In the present disclosure, the process of executing step 103 by the indoor volatile substance leakage traceability device can be specifically referred to FIG. 6, including the following steps:

S1031. Perform clustering on the rising time period of each component of each monitoring point in combination with the preset clustering algorithm and the starting time point to obtain multiple clusters; the number of clusters is each in the volatile substance information of each monitoring point The number of time periods during which the maximum concentration of the ingredient is increased.

Among them, the preset clustering algorithm may be, for example, the K-means algorithm.

S1032, in each cluster, for each component of each monitoring point, the earliest concentration increase time period at the initial time point is selected as the concentration increase time period of the component at the monitoring point.

In this disclosure, assuming that the number of indoor potential leak points is x and the number of monitoring points is y, theoretically, after a leak occurs at a certain indoor location, all monitoring points will eventually respond to the leak. However, in some cases, only part of the indoor monitoring points have a significant response to leakage. Therefore, it is necessary to determine whether each component in each cluster meets the leak traceability condition. In order to determine whether the leak traceability condition is met, before step 1032, step 103 may also include the following steps: in each cluster, for each component, determine whether the component meets the leak traceability condition; the leak traceability condition is the concentration of the component in the cluster The number of monitoring points in the rising time period is greater than the third number threshold; the third number threshold is determined according to the number of potential leak points and the threshold of the number of leak traceability monitoring points; if the component meets the leak traceability condition, it is determined that the component needs to be leak traced and obtained The time vector sequence and amplitude vector sequence corresponding to the component; if the component does not meet the leakage traceability condition, it is determined that the leakage traceability operation is not required for the component, and the time vector sequence and amplitude vector sequence corresponding to the component are stopped.

S1033. In each cluster, for each component, sort the monitoring points according to the starting time point of the concentration increase period and the increase in concentration information to obtain the time vector sequence and the amplitude vector sequence corresponding to the component.

S104, according to the time vector sequence and the amplitude vector sequence corresponding to the component, determine whether the component has leakage and the leakage point and the leakage time point of the component.

FIG. 7 is a schematic flow chart of another method for tracing the source of leakage of indoor volatile substances provided by an embodiment of the present disclosure. As shown in FIG. 7, based on the embodiment shown in FIG. 1, step 104 may further include the following steps:

S1041. Acquire a leakage database. The leakage database includes: a time reference vector sequence and an amplitude reference vector sequence when each component leaks at each leak point.

In the present disclosure, because the indoor monitoring point is at a fixed location, multiple leaks at the same location show that the concentration data collected at the monitoring point have common characteristics. This common feature is specifically manifested in the time sequence and amplitude of the increase in the component concentration signal of the volatile substance at each monitoring point. If a common feature is obtained as a reference feature for comparison, then the features obtained after the information processing of the measured volatile substances can be compared with the reference features of each leakage situation, and the leakage situation that is the closest to the two has the greatest probability of leakage. Based on this logic, the present disclosure can perform three-dimensional modeling of the indoor pump room area, detailed description of the geometric structure where the leak is located; perform calculation grid division on the three-dimensional model; simulate the leakage of each leak point; The simulation results are processed to obtain the concentration signal curves of the volatile substances at each monitoring point under various leakage situations. In each curve, the time and amplitude of the concentration rise caused by the leakage are extracted, after sorting, the time reference vector sequence and the amplitude reference vector sequence of each monitoring point after the leak occurs are obtained, and stored in Leak in the database.

S1042, according to the time vector sequence and amplitude vector sequence corresponding to the component, and the time reference vector sequence and amplitude reference vector sequence of the component at each leakage point in the leakage database, determine the leakage probability of the component at each leakage point.

In the present disclosure, the process of performing step 1042 by the indoor volatile substance leakage traceability device may specifically be to determine the leakage point according to the time reference vector sequence of the leakage point and the time vector sequence of the composition for each leakage point of the composition in the leakage database The first leakage probability of the leakage point; the second leakage probability of the leakage point is determined according to the amplitude reference vector sequence of the leakage point and the amplitude vector sequence of the component; the weighted sum of the first leakage probability and the second leakage probability is performed to determine that the component is in The leak probability of the leak point. Among them, the calculation method of the first leakage probability and the second leakage probability is any one of the following methods, or a weighted sum of calculation results of multiple methods: Euclidean distance calculation, vector included angle cosine degree calculation.

For example, assume that the corresponding component is represented by a time sequence of vectors _{V 1 (v1, v2, ...} , vn), the leak in the component database at time i-th reference vector sequence with a leak _{V i (vi1, vi2, ...} vin ) Means that the calculation formula of the first leakage probability can be as shown in the following formulas (1) to (4).

Among them, p _di represents the Euclidean distance between the time reference vector sequence of the component at the ith leak point and the time vector sequence of the component; p _θi represents the time reference vector sequence of the component at the ith leak point and the time vector sequence of the component The calculated value of the cosine degree of the angle between the vectors. Perform a weighted summation or average of p _di and p _θi to obtain the first leakage probability. In addition, the calculation method of the second leakage probability can refer to the calculation method of the first leakage probability, replace the time vector sequence in the calculation method of the first leakage probability with the amplitude vector sequence, and replace the value in the calculation method of the first leakage probability. The time reference vector sequence is replaced with the amplitude reference vector sequence.

In the present disclosure, since the increase in concentration information of each monitoring point may be inconsistent at different stages of leakage, and the rising sequence is relatively fixed, a greater weight can be given to the first leakage probability, which is set to 0.7 by default.

S1043, according to the leakage probability of the component at each leakage point, determine whether the component has leakage and the leakage point of the component.

In the present disclosure, the process of performing step 1043 by the indoor volatile substance leakage traceability device may specifically be: sorting the leakage points according to the leakage probability of the components at each leakage point; the predetermined number of leakage points in the prior order When the leakage probability is greater than the preset probability threshold, it is determined that the component has a leakage, and the preset number of leakage points ranked first are determined as the leakage points of the component.

S1044. When a component has a leakage, determine the starting time point of the concentration increase period of the first monitoring point of the component in the corresponding time vector sequence as the leakage time point of the component.

In the indoor volatile substance leakage traceability method of the embodiment of the present disclosure, the volatile substance information of each monitoring point in the room is obtained. The volatile substance information includes: the concentration information of at least one component of the volatile substance at each collection time point; According to the volatile substance information of the monitoring points, determine the concentration increase time period of at least one component; the concentration increase time period is the time period that meets the preset increase condition; for each component in at least one component, Determine the time vector sequence and amplitude vector sequence corresponding to each component according to the concentration increase time period of each component at each monitoring point; the time vector sequence is to sort the monitoring points in ascending order according to the starting time point of the concentration increase time period The obtained sequence; the amplitude vector sequence is the sequence obtained by sorting the detection points in descending order according to the concentration information in the time period of the concentration increase; the leakage database is obtained, and the leakage database includes: the time reference of each component when each leakage point leaks Vector sequence and amplitude reference vector sequence; according to the time vector sequence and amplitude vector sequence corresponding to the component, and the time reference vector sequence and amplitude reference vector sequence of the component at each leakage point in the leakage database, determine the component at each leakage point Leakage probability; according to the leakage probability of the component at each leakage point, determine whether there is leakage of the component and the leakage point of the component. When there is a leakage of the component, the concentration of the component at the first monitoring point in the corresponding time vector sequence is increased for the time period The starting time point of the component is determined as the leakage time point of the component, so that manual participation can be avoided, labor costs can be reduced, and leakage problems can be detected and traced in time to improve detection efficiency.

FIG. 8 is a schematic structural diagram of an indoor volatile substance leakage source tracing device provided by an embodiment of the disclosure. As shown in FIG. 8, it includes: an acquiring module 81, a first determining module 82, a second determining module 83 and a third determining module 84.

Wherein, the obtaining module 81 is configured to obtain volatile substance information at various monitoring points in the room, where the volatile substance information includes: concentration information of at least one component of the volatile substance at each collection time point;

The first determining module 82 is configured to determine, for each monitoring point, a time period for increasing the concentration of the at least one component according to the volatile substance information of the monitoring point; the time period for increasing the concentration is to satisfy a preset increase Time period of high conditions;

The second determining module 83 is configured to determine the time vector sequence and the amplitude vector sequence corresponding to each component according to the concentration increase time period of the component at each monitoring point for each component in the at least one component; The time vector sequence is a sequence obtained by sorting each monitoring point in ascending order according to the starting time point of the concentration increase time period; the amplitude vector sequence is a sequence of the detection points according to the concentration information in the concentration increase time period. The sequence obtained by sorting in descending order;

The third determining module 84 is configured to determine whether the component has leakage and the leakage point and the leakage time point of the component according to the time vector sequence and the amplitude vector sequence corresponding to the component.

On the basis of the foregoing embodiment, the preset rising condition is that the number of time points in which the concentration information continuously rises is greater than or equal to the first number threshold, and the number of time points in which the concentration information continuously falls is less than or equal to the second number threshold, and the concentration The time period in which the increment of information is greater than the first increment threshold.

On the basis of the foregoing embodiment, the first determining module 82 is specifically configured to obtain, for each component of each monitoring point, the concentration information of the component at any two adjacent collection time points; The collection time point includes: a first collection time point and a second collection time point, where the first collection time point is less than the second collection time point;

When the difference between the concentration information at the second collection time point and the concentration information at the first collection time point is greater than 0, the second collection time point is incrementally marked; at the second collection time point When the difference between the concentration information at the first collection time point and the concentration information at the first collection time point is less than or equal to 0, decrement marking is performed on the second collection time point to generate a marking sequence corresponding to the component;

Judging whether there are consecutive increment marks of a first number threshold in the increment mark sequence;

When there are consecutive increment marks of the first number threshold value in the incremental mark sequence, the time point of the first increment mark in the consecutive first number threshold increment marks is determined as the beginning of the concentration increase time period. Start time

Judging whether there is a continuous second number of threshold decrement markers after the start time point in the increment marker sequence;

When there is a continuous second number of threshold decrement markers after the starting time point in the incremental marker sequence, the time point of the last decrement marker in the second continuous number of threshold decrement markers is determined as the concentration The end time point of the rising time period;

Judging whether the increase in concentration information of the concentration increase time period determined according to the start time point and the end time point is greater than or equal to a first increase threshold;

When the increase in concentration information of the concentration increase time period determined according to the start time point and the end time point is greater than or equal to the first increase threshold, the determined concentration increase time period is used as the component Concentration rise time period.

On the basis of the above-mentioned embodiment, the second determining module 83 is specifically configured to perform clustering of the concentration increase time period of each component of each monitoring point in combination with the preset clustering algorithm and the starting time point to obtain multiple Clusters; the number of the clusters is the number of time periods during which the maximum concentration of each component in the volatile substance information of each monitoring point increases;

In each cluster, for each component of each monitoring point, the earliest concentration increase time period at the initial time point is selected as the concentration increase time period of the component at the monitoring point;

In each cluster, for each component, the monitoring points are sorted according to the starting time point of the concentration increase time period and the increase in concentration information to obtain the time vector sequence and the amplitude vector sequence corresponding to the component.

On the basis of the foregoing embodiment, the second determining module 83 is also specifically configured to determine whether the component satisfies the leak traceability condition for each component in each cluster; the leak traceability condition is: The number of monitoring points in the time period during which the concentration of the component is increased is greater than a third number threshold; the third number threshold is determined according to the number of potential leak points and the threshold value of the number of leak traceability monitoring points;

If the component satisfies the leak traceability condition, it is determined that a leak traceability operation is required for the component, and the time vector sequence and the amplitude vector sequence corresponding to the component are obtained;

If the component does not satisfy the leakage traceability condition, it is determined that the leakage traceability operation is not required for the component, and the acquisition of the time vector sequence and the amplitude vector sequence corresponding to the component is stopped.

On the basis of the foregoing embodiment, the third determining module 84 is specifically configured to obtain a leakage database, the leakage database including: a time reference vector sequence and an amplitude reference vector sequence when each component leaks at each leak point;

According to the time vector sequence and amplitude vector sequence corresponding to the component, and the time reference vector sequence and amplitude reference vector sequence of the component at each leakage point in the leakage database, the leakage of the component at each leakage point is determined. Probability

According to the leakage probability of the component at each leakage point, determine whether the component has leakage and the leakage point of the component;

When there is leakage of the component, the starting time point of the concentration increase period of the first monitoring point of the component in the corresponding time vector sequence is determined as the leakage time point of the component.

On the basis of the foregoing embodiment, the third determining module 84 is specifically configured to, for each leakage point of the component in the leakage database, according to the time reference vector sequence of the leakage point and the time of the component A vector sequence to determine the first leakage probability of the leakage point;

Determine the second leakage probability of the leakage point according to the amplitude reference vector sequence of the leakage point and the amplitude vector sequence of the component;

A weighted summation is performed on the first leakage probability and the second leakage probability to determine the leakage probability of the component at the leakage point.

On the basis of the foregoing embodiment, the calculation method of the first leakage probability and the second leakage probability is any one of the following methods, or a weighted sum of the calculation results of multiple methods: Euclidean distance calculation, Calculation of cosine degree of vector included angle.

On the basis of the foregoing embodiment, the third determining module 84 is specifically configured to sort the leakage points according to the leakage probability of the components at each leakage point;

When the leakage probability of a predetermined number of leak points in the previous order is greater than a predetermined probability threshold, it is determined that the component has a leak, and the predetermined number of leak points in the previous order is determined as the leak point of the component.

On the basis of the foregoing embodiment, the volatile substance information of each monitoring point is collected by a mass spectrometer; correspondingly, the acquisition module 81 is specifically configured to obtain volatile substances collected by the mass spectrometer at each monitoring point in the room information;

Generating a concentration curve corresponding to the at least one component according to the concentration information of the at least one component of the volatile substance at each collection time point;

Noise reduction, moving average filtering, and isomer merging are performed on the concentration curve corresponding to the at least one component to obtain volatile substance information at each monitoring point.

It should be noted that, for the description of each module in the present disclosure, reference may be made to the method embodiments shown in FIG. 1 to FIG. 7, and detailed descriptions are omitted here.

Referring now to FIG. 9, it shows a schematic structural diagram of an electronic device 800 suitable for implementing embodiments of the present disclosure. The electronic devices in the embodiments of the present disclosure may include, but are not limited to, mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), vehicle-mounted terminals (e.g. Mobile terminals such as car navigation terminals) and fixed terminals such as digital TVs, desktop computers, etc. The electronic device shown in FIG. 9 is only an example, and should not bring any limitation to the function and scope of use of the embodiments of the present disclosure.

As shown in FIG. 9, the electronic device 800 may include a processing device (such as a central processing unit, a graphics processor, etc.) 801, which may be loaded into a random access device according to a program stored in a read-only memory (ROM) 802 or from a storage device 808. The program in the memory (RAM) 803 executes various appropriate actions and processing. In the RAM 803, various programs and data required for the operation of the electronic device 800 are also stored. The processing device 801, the ROM 802, and the RAM 803 are connected to each other through a bus 804. An input/output (I/O) interface 805 is also connected to the bus 804.

Generally, the following devices can be connected to the I/O interface 805: including input devices 806 such as touch screen, touch pad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, etc.; including, for example, liquid crystal display (LCD), speakers, vibration An output device 807 such as a device; a storage device 808 such as a tape, a hard disk, etc.; and a communication device 809. The communication device 809 may allow the electronic device 800 to perform wireless or wired communication with other devices to exchange data. Although FIG. 7 shows an electronic device 800 having various devices, it should be understood that it is not required to implement or have all the illustrated devices. It may be implemented alternatively or provided with more or fewer devices.

In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program may be downloaded and installed from the network through the communication device 809, or installed from the storage device 808, or installed from the ROM 802. When the computer program is executed by the processing device 801, the above-mentioned functions defined in the method of the embodiment of the present disclosure are executed.

It should be noted that the above-mentioned computer-readable medium in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or a combination of any of the above. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable removable Programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a program, and the program may be used by or in combination with an instruction execution system, apparatus, or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as a part of a carrier wave, and a computer-readable program code is carried therein. This propagated data signal can take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. The computer-readable signal medium may also be any computer-readable medium other than the computer-readable storage medium. The computer-readable signal medium may send, propagate, or transmit the program for use by or in combination with the instruction execution system, apparatus, or device . The program code contained on the computer-readable medium can be transmitted by any suitable medium, including but not limited to: wire, optical cable, RF (Radio Frequency), etc., or any suitable combination of the above.

The above-mentioned computer-readable medium may be included in the above-mentioned electronic device; or it may exist alone without being assembled into the electronic device.

The aforementioned computer-readable medium carries one or more programs, and when the aforementioned one or more programs are executed by the electronic device, the electronic device:

Acquiring volatile substance information at each monitoring point in the room, where the volatile substance information includes: concentration information of at least one component of the volatile substance at each collection time point;

For each monitoring point, determine the concentration increase time period of the at least one component according to the volatile substance information of the monitoring point; the concentration increase time period is a time period that meets a preset increase condition;

For each component of the at least one component, determine the time vector sequence and the amplitude vector sequence corresponding to each component according to the time period of the concentration increase of the component at each monitoring point; the time vector sequence is based on the concentration A sequence obtained by sorting each monitoring point in ascending order at the start time point of the rising time period; the amplitude vector sequence is a sequence obtained by sorting each detection point in descending order according to the concentration information in the concentration rising time period;

According to the time vector sequence and the amplitude vector sequence corresponding to the component, it is determined whether the component has leakage and the leakage point and the leakage time point of the component.

The computer program code used to perform the operations of the present disclosure may be written in one or more programming languages or a combination thereof. The above-mentioned programming languages include object-oriented programming languages—such as Java, Smalltalk, C++, and also conventional Procedural programming language-such as "C" language or similar programming language. The program code can be executed entirely on the user's computer, partly on the user's computer, executed as an independent software package, partly on the user's computer and partly executed on a remote computer, or entirely executed on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (for example, using an Internet service provider to pass Internet connection).

The present disclosure also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the above-mentioned indoor volatile substance leakage traceability method is realized.

The present disclosure also provides a computer program product, which when the instruction processor in the computer program product executes, realizes the above-mentioned indoor volatile substance leakage traceability method.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , Structures, materials, or characteristics are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

Any process or method description described in the flowchart or described in other ways herein can be understood as a module, segment or part of code that includes one or more executable instructions for implementing custom logic functions or steps of the process , And the scope of the embodiments of the present disclosure includes additional implementations, which may not be in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved, which should be As understood by those skilled in the art to which the embodiments of the present disclosure belong.

The logic and/or steps represented in the flowchart or described in other ways herein, for example, can be considered as a sequenced list of executable instructions for implementing logic functions, and can be embodied in any computer-readable medium, For use by instruction execution systems, devices, or equipment (such as computer-based systems, systems including processors, or other systems that can fetch and execute instructions from instruction execution systems, devices, or equipment), or combine these instruction execution systems, devices Or equipment. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, device, or device or in combination with these instruction execution systems, devices, or devices. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections (electronic devices) with one or more wiring, portable computer disk cases (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable and editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program can be printed, because it can be used, for example, by optically scanning the paper or other medium, followed by editing, interpretation, or other suitable media if necessary. The program is processed in a manner to obtain the program electronically, and then stored in the computer memory.

It should be understood that each part of the present disclosure can be implemented by hardware, software, firmware, or a combination thereof. In the foregoing embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if it is implemented by hardware as in another embodiment, it can be implemented by any one or a combination of the following technologies known in the art: Discrete logic gate circuits with logic functions for data signals Logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate array (PGA), field programmable gate array (FPGA), etc.

A person of ordinary skill in the art can understand that all or part of the steps carried in the method of the foregoing embodiments can be implemented by a program instructing relevant hardware to complete. The program can be stored in a computer-readable storage medium. When executed, it includes one of the steps of the method embodiment or a combination thereof.

In addition, the functional units in the various embodiments of the present disclosure may be integrated into one processing module, or each unit may exist alone physically, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

The aforementioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present disclosure. Those of ordinary skill in the art can comment on the foregoing within the scope of the present disclosure. The embodiment undergoes changes, modifications, substitutions, and modifications.

Claims

A method for tracing indoor volatile substances leakage, including:

Acquiring volatile substance information at each monitoring point in the room, where the volatile substance information includes: concentration information of at least one component of the volatile substance at each collection time point;

For each monitoring point, determine the concentration increase time period of the at least one component according to the volatile substance information of the monitoring point; the concentration increase time period is a time period that meets a preset increase condition;

For each component of the at least one component, determine the time vector sequence and the amplitude vector sequence corresponding to each component according to the time period of the concentration increase of the component at each monitoring point; the time vector sequence is based on the concentration A sequence obtained by sorting each monitoring point in ascending order at the start time point of the rising time period; the amplitude vector sequence is a sequence obtained by sorting each detection point in descending order according to the concentration information in the concentration rising time period;

According to the time vector sequence and the amplitude vector sequence corresponding to the component, it is determined whether the component has leakage and the leakage point and the leakage time point of the component.
The method according to claim 1, wherein the preset rising condition is that the number of time points in which the concentration information continuously rises is greater than or equal to a first number threshold, and the number of time points in which the concentration information continuously falls is less than or equal to the second number threshold, and The increment of the density information is greater than or equal to the time period of the first increment threshold.
The method according to claim 2, wherein for each monitoring point, determining a time period for increasing the concentration of the at least one component according to the volatile substance information of the monitoring point comprises:

For each component of each monitoring point, obtain the concentration information of the component at any two adjacent collection time points; the adjacent collection time points include: the first collection time point and the second collection time point, the The first collection time point is less than the second collection time point;

When the difference between the concentration information at the second collection time point and the concentration information at the first collection time point is greater than 0, the second collection time point is incrementally marked; at the second collection time point When the difference between the concentration information at the first collection time point and the concentration information at the first collection time point is less than or equal to 0, decrement marking is performed on the second collection time point to generate a marking sequence corresponding to the component;

Judging whether there are consecutive increment marks of a first number threshold in the increment mark sequence;

When there are consecutive increment marks of the first number threshold value in the incremental mark sequence, the time point of the first increment mark in the consecutive first number threshold increment marks is determined as the beginning of the concentration increase time period. Start time

Judging whether there is a continuous second number of threshold decrement markers after the start time point in the increment marker sequence;

When there is a continuous second number of threshold decrement markers after the starting time point in the incremental marker sequence, the time point of the last decrement marker in the second continuous number of threshold decrement markers is determined as the concentration The end time point of the rising time period;

Judging whether the increase in concentration information of the concentration increase time period determined according to the start time point and the end time point is greater than or equal to a first increase threshold;

When the increase in concentration information of the concentration increase time period determined according to the start time point and the end time point is greater than or equal to the first increase threshold, the determined concentration increase time period is used as the component Concentration rise time period.
The method according to claim 1, wherein for each component of the at least one component, the time vector sequence and amplitude corresponding to each component are determined according to the time period of the concentration increase of the component at each monitoring point Vector sequence, including:

The concentration of each component of each monitoring point is increased for the time period, combined with the preset clustering algorithm and the starting time point to cluster to obtain multiple clusters; the number of the clusters is each of the volatile substance information of each monitoring point The number of time periods when the maximum concentration of the ingredient is increased;

In each cluster, for each component of each monitoring point, the earliest concentration increase time period at the initial time point is selected as the concentration increase time period of the component at the monitoring point;

In each cluster, for each component, the monitoring points are sorted according to the starting time point of the concentration increase time period and the increase in concentration information to obtain the time vector sequence and the amplitude vector sequence corresponding to the component.
The method according to claim 4, wherein in each cluster, for each component of each monitoring point, the earliest concentration rise time period at the initial time point is selected as the concentration of the component at the monitoring point Before the increase period, it also includes:

In each cluster, for each component, determine whether the component meets the leak traceability condition; the leak traceability condition is that the number of monitoring points in the cluster during which the concentration of the component rises is greater than the third number threshold; The third number threshold is determined according to the number of potential leak points and the threshold value of the number of leak traceability monitoring points;

If the component satisfies the leak traceability condition, it is determined that a leak traceability operation is required for the component, and the time vector sequence and the amplitude vector sequence corresponding to the component are obtained;

If the component does not satisfy the leakage traceability condition, it is determined that the leakage traceability operation is not required for the component, and the acquisition of the time vector sequence and the amplitude vector sequence corresponding to the component is stopped.
The method according to claim 1, wherein the determining whether the component has leakage and the leakage point and the leakage time point of the component according to the time vector sequence and the amplitude vector sequence corresponding to the component comprises:

Acquire a leakage database, the leakage database including: time reference vector sequence and amplitude reference vector sequence when each component leaks at each leak point;

According to the time vector sequence and amplitude vector sequence corresponding to the component, and the time reference vector sequence and amplitude reference vector sequence of the component at each leakage point in the leakage database, the leakage of the component at each leakage point is determined. Probability

According to the leakage probability of the component at each leakage point, determine whether the component has leakage and the leakage point of the component;

When there is leakage of the component, the starting time point of the concentration increase period of the first monitoring point of the component in the corresponding time vector sequence is determined as the leakage time point of the component.
The method according to claim 6, wherein the time vector sequence and the amplitude vector sequence corresponding to the component are compared with the time reference vector sequence and the amplitude reference vector sequence of the component at each leak point in the leakage database , To determine the leakage probability of the component at each leakage point, including:

For each leakage point of the component in the leakage database, determine the first leakage probability of the leakage point according to the time reference vector sequence of the leakage point and the time vector sequence of the component;

Determine the second leakage probability of the leakage point according to the amplitude reference vector sequence of the leakage point and the amplitude vector sequence of the component;

A weighted summation is performed on the first leakage probability and the second leakage probability to determine the leakage probability of the component at the leakage point.
The method according to claim 7, wherein the calculation method of the first leakage probability and the second leakage probability is any one of the following methods, or a weighted sum of calculation results of multiple methods: Euclidean distance calculation , Vector angle cosine degree calculation.
The method according to claim 6, wherein the determining whether the component has leakage and the leakage point of the component according to the probability of the component leaking at each leakage point comprises:

Sorting the leakage points according to the leakage probability of the components at each leakage point;

When the leakage probability of a predetermined number of leak points in the previous order is greater than a predetermined probability threshold, it is determined that the component has a leak, and the predetermined number of leak points in the previous order is determined as the leak point of the component.
The method according to claim 1, wherein the volatile substance information of each monitoring point is collected by a mass spectrometer;

The obtaining of volatile substance information at each monitoring point in the room includes:

Obtain information on volatile substances collected by mass spectrometers at various monitoring points in the room;

Generating a concentration curve corresponding to the at least one component according to the concentration information of the at least one component of the volatile substance at each collection time point;

Noise reduction, moving average filtering, and isomer merging are performed on the concentration curve corresponding to the at least one component to obtain volatile substance information at each monitoring point.
A leakage source tracing device for indoor volatile substances, including:

The acquiring module is used to acquire volatile substance information at each monitoring point in the room, where the volatile substance information includes: concentration information of at least one component of the volatile substance at each collection time point;

The first determining module is configured to determine, for each monitoring point, a time period for the concentration increase of the at least one component according to the volatile substance information of the monitoring point; the concentration increase time period is to meet a preset increase The time period of the condition;

The second determining module is configured to determine the time vector sequence and the amplitude vector sequence corresponding to each component according to the concentration increase time period of the component at each monitoring point for each component in the at least one component; The time vector sequence is a sequence obtained by sorting the monitoring points in ascending order according to the starting time point of the concentration increase time period; the amplitude vector sequence is the descending order of each detection point according to the concentration information in the concentration increase time period The sequence obtained by sorting;

The third determining module is used to determine whether the component has leakage and the leakage point and the leakage time point of the component according to the time vector sequence and the amplitude vector sequence corresponding to the component.
An electronic device including:

A memory, a processor, and a computer program that is stored on the memory and can run on the processor, and when the processor executes the program, the indoor volatile substance leakage source method according to any one of claims 1-10 is realized .
A computer-readable storage medium with a computer program stored thereon, and when the program is executed by a processor, the indoor volatile substance leakage traceability method according to any one of claims 1-10 is realized.