Fire early warning and monitoring method for exposed coal field

Abstract

The invention relates to a fire early warning and monitoring method for an exposed coal field. The fire early-warning monitoring method for the exposed coal field comprises the following steps: setting an early-warning generation mode and an early-warning monitoring mode; wherein the data of the early warning generation mode is obtained by a detection system; setting a standard group and a fire group in the early warning generation mode; comparing the smoke values of the actual measurement group and the standard group, and comparing the smoke values of the actual measurement group and the fire group; if the smoke value of the actual measurement group is greater than the standard group and smaller than the fire group, judging that the state is normal; if the smoke value of the actual measurement group is greater than the smoke value of the fire group, determining a fire state; after a numerical value obtained in the early warning monitoring mode is manually rechecked, data of the numerical value are respectively supplemented into a standard group and a fire group; the data of the standard group, the actual measurement group and the fire group are respectively obtained through the detection system. The fire early warning and monitoring method for the exposed coal field has the advantage that the fire of the coal field can be accurately pre-judged.

Description

Technical Field

[0001] The invention relates to the technical field of coal or gas outburst early warning monitoring, and in particular to a fire early warning monitoring method for an exposed coalfield. Background Art

[0002] The significance and importance of coalfield fire early warning are multifaceted and can be understood from the following perspectives:

[0003] 1) Safety significance: Coalfield fire area refers to the fire area in the coal mine that is not effectively controlled, which may cause safety accidents such as explosion and smoke diffusion. Therefore, early warning of coalfield fire can improve the safety of coal mines and protect the safety of workers and facilities.

[0004] 2) Environmental significance: Fires in coal mine fire areas will release a large amount of harmful gases and smoke, causing pollution to the atmosphere and groundwater resources. Fire area management can reduce the damage to the environment caused by coal mine fires, reduce the emission of smoke and harmful gases, and protect the ecological environment.

[0005] 3) Economic significance: The existence of coalfield fire areas will not only cause waste of coal mine resources, but also cause economic losses such as mine shutdown, equipment damage, and casualties. Through early warning and control of coalfield fire areas, normal production of coal mines can be restored, resource utilization can be improved, and the economic interests related to coal mines can be protected to the maximum extent.

[0006] 4) Social significance: Coal mine accidents can have a negative impact on social stability, causing casualties among workers, broken families and other adverse consequences. Early warning of coal mine fires can improve the production safety of coal miners.

[0007] Based on the above, effective early warning can know and see the corresponding response measures in advance, reduce the panic caused by uncertainty, and reduce economic losses. Based on this, it is necessary to give early warning for coalfield fires. The significance of disaster early warning technology: Disaster early warning technology can assess the possibility and harm of disasters based on the hidden dangers and precursor information obtained before the disaster occurs, and send alarm signals to relevant departments or personnel to remind them to take prevention and control measures in time to avoid the occurrence of disasters. Early warning can achieve early identification and source control of safety risks, and resolve disasters in the bud.

[0008] In the existing technology, the early warning of coalfield fires lacks a technical basis. It can only be obtained and understood after the fire occurs and can be identified by wide-area technology. Although the magnetic method of demarcating the range can make a certain degree of prediction, according to the results of actual application, its accuracy is not high enough. The demarcated range is quite different from the actual fire area. This is caused by the interference of underground non-uniform resistivity anomalies. Therefore, the existing technology cannot accurately predict coalfield fires. Summary of the invention

[0009] Based on this, the purpose of the present invention is to provide a fire early warning monitoring method for exposed coal fields, which has the advantage of being able to accurately predict coal field fires.

[0010] One aspect of the present invention provides a fire early warning monitoring method for an exposed coalfield, comprising:

[0011] Setting an early warning generation mode and an early warning monitoring mode; wherein the data of the early warning generation mode is obtained by the detection system;

[0012] In the early warning generation mode, a standard group and a fire group are set; the smoke values ​​of the measured group and the standard group are compared, and the smoke values ​​of the measured group and the fire group are compared; if the smoke value of the measured group is greater than that of the standard group and less than that of the fire group, it is judged to be a normal state; if the smoke value of the measured group is greater than that of the fire group, it is judged to be a fire state;

[0013] After the values ​​obtained in the early warning monitoring mode are manually reviewed, the data are added to the standard group and the fire group respectively;

[0014] The data of the standard group, the measured group and the fire group are respectively obtained through the detection system.

[0015] The fire early warning monitoring method for exposed coal fields described in the present invention has two associated modes, one of which is an early warning generation mode and the other is an early warning monitoring mode. The standard group and the fire group of the early warning generation mode are obtained by detection, and their values ​​are adjustable. They need to be added to the standard group and the fire group respectively according to the data of the early warning monitoring mode and after manual review, so that the accuracy of the data is greatly guaranteed, and the accuracy will not decrease with the passage of time. In the present invention, the smoke value is used as a control variable and obtained by a smoke sensor, which is conducive to timely discovery of hidden fire conditions. When the combustion is insufficient, when the fire is just started or even the high temperature is formed, the combustion is insufficient and smoke is generated, the fire condition cannot be easily observed from the surface at this time, but it can be judged from the smoke concentration value in the air. Even if the smoke concentration value is low and not easy to be observed, the signal can be quickly and keenly obtained by the smoke sensor, thereby providing an accurate judgment technical means. Compared with the prior art, the present invention not only has high detection accuracy, but also can continuously ensure the detection accuracy, and will not reduce the accuracy over time, thereby permanently ensuring the detection accuracy.

[0016] Further, the detection system includes a standard column and a plurality of detection columns;

[0017] The detection column includes an outer cylinder, an inner cylinder, a fixing ring, an outer circular flow guide tube, an inner circular flow guide tube, a smoke sensor, and a controller with a communication module;

[0018] The inner cylinder is sleeved in the outer cylinder, the fixing ring is sleeved on the inner cylinder and placed at the bottom of the inner cylinder, and the inner cylinder is fixedly connected to the outer cylinder through the fixing ring; a plurality of fixing rings are arranged in parallel;

[0019] The bottom end of the inner cylinder is flush with the bottom end of the outer cylinder; the top end of the inner cylinder is lower than the top end of the outer cylinder;

[0020] A plurality of the outer circular flow guide pipes are distributed in a circular array on the inner wall of the outer cylinder to form a layer of outer circular flow guide pipes, and multiple layers of outer circular flow guide pipes are formed in the outer cylinder;

[0021] A plurality of inner circular flow guide pipes are arranged in a circular array on the outer wall of the inner cylinder to form a layer of inner circular flow guide pipes, and multiple layers of inner circular flow guide pipes are formed outside the inner cylinder;

[0022] An air flow inlet is formed on the outer wall of the outer cylinder between the outer circular flow guide pipe at the bottom layer and the fixing ring;

[0023] The standard column includes the detection column and a plug; the plug is fixedly mounted on the bottom end of the inner cylinder;

[0024] The smoke sensor is mounted on the controller, and the controller is mounted in the outer cylinder.

[0025] Furthermore, the detection column further comprises a flow guide tube, which is arranged obliquely downward and fixedly connected to the air flow inlet;

[0026] The outer wall of the outer cylinder is formed with two air flow inlets, and the angle between the two air flow inlets is 90 degrees; the two air flow inlets are respectively installed with the guide pipes, and the angle between the two guide pipes is 90 degrees.

[0027] Furthermore, the detection column also includes a stabilizing rod, which is arranged transversely and has one end fixedly connected to the bottom of the outer cylinder;

[0028] The plurality of stabilizing rods are evenly distributed on the outer wall of the outer cylinder.

[0029] Furthermore, the length of each layer of the outer circular flow guide pipe is the same as the length of each layer of the inner circular flow guide pipe;

[0030] The lengths of the multiple layers of outer circular flow guide pipes increase from bottom to top, and the lengths of the multiple layers of inner circular flow guide pipes increase from bottom to top.

[0031] Furthermore, the controller is installed on the inner wall of the outer cylinder and is located between the outer circular flow guide pipe of the highest layer and the outer circular flow guide pipe of the adjacent layer.

[0032] Further, the smoke value is obtained by detecting the smoke sensor on the column and the measured group is obtained;

[0033] The smoke value is obtained through the smoke sensor on the standard column, and a standard group under the standard state and a fire group under the fire state are obtained respectively.

[0034] Furthermore, in the early warning monitoring mode, horizontal data comparison and vertical data comparison are performed respectively;

[0035] The horizontal data comparison comprises the steps of:

[0036] First, the measured group data obtained from the plurality of detection columns are compared one by one to find the measured group value of the detection column with the highest value;

[0037] Secondly, taking the detection column with the highest value as the center of the circle, analyze the value change trend of the detection columns around it to determine whether the measured values ​​around it show a downward trend one by one; if so, an alarm prompt is issued; if not, a normal state prompt is issued;

[0038] The longitudinal data comparison includes:

[0039] The measured values ​​of a single detection column within a fixed time interval are counted and the average value is obtained as the longitudinal comparison number of the single detection column. The continuous longitudinal comparison numbers of the single detection column are continuously compared and the continuous longitudinal comparison numbers are compared with the standard group and the fire group respectively.

[0040] If the longitudinal comparison number is between the standard group and the fire group, the longitudinal comparison number is recorded and saved; the longitudinal comparison number is recorded multiple times continuously to obtain a longitudinal comparison array;

[0041] According to the longitudinal comparison array, a curve is drawn with time as the horizontal axis and multiple consecutive longitudinal comparison numbers at the time of fire, and any value in the middle that is smaller than the fire group is set as the critical point;

[0042] Compare the latest measured group data of any detection column with its most recently recorded measured group data. If it increases and is less than the critical point value, it indicates a normal state; if it increases and is greater than the critical point value, it is judged as a fire warning.

[0043] Furthermore, after the longitudinal data comparison, if the conclusion is a fire warning, the actual measurement groups of multiple detection columns closest to the detection column are judged one by one, and if at least one conclusion is a fire warning, a fire prompt is issued;

[0044] If there is no conclusion of fire warning, a misjudgment risk reminder will be issued.

[0045] Further, the critical points are adjusted, and the standard group and the fire group are updated.

[0046] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A front view of an exemplary detection column of the present invention;

[0048] Figure 2 is a schematic diagram of a three-dimensional structure of an exemplary detection column of the present invention;

[0049] Figure 3 A schematic diagram of the three-dimensional structure of an exemplary detection column of the present invention from another viewing angle;

[0050] Figure 4 A top view of an exemplary detection column of the present invention;

[0051] Figure 5 is a cross-sectional view of an exemplary detection column of the present invention;

[0052] Figure 6 A cross-sectional view of an exemplary standard column of the present invention;

[0053] Figure 7 A cross-sectional view of an exemplary detection column of the present invention (with a schematic diagram of the position of the controller);

[0054] Figure 8 Schematic diagram of the distribution state of detection columns and standard columns of an exemplary detection system of the present invention. DETAILED DESCRIPTION

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0056] An exemplary method for early warning and monitoring of fire in an exposed coalfield according to the present invention comprises:

[0057] Setting an early warning generation mode and an early warning monitoring mode; wherein the data of the early warning generation mode is obtained by the detection system;

[0058] In the early warning generation mode, a standard group and a fire group are set; the smoke values ​​of the measured group and the standard group are compared, and the smoke values ​​of the measured group and the fire group are compared; if the smoke value of the measured group is greater than that of the standard group and less than that of the fire group, it is judged to be a normal state; if the smoke value of the measured group is greater than that of the fire group, it is judged to be a fire state;

[0059] After the values ​​obtained in the early warning monitoring mode are manually reviewed, the data are added to the standard group and the fire group respectively;

[0060] The data of the standard group, the measured group and the fire group are respectively obtained through the detection system.

[0061] The fire early warning monitoring method for exposed coal fields described in the present invention has two associated modes, one of which is an early warning generation mode and the other is an early warning monitoring mode. The standard group and the fire group of the early warning generation mode are obtained by detection, and their values ​​are adjustable. They need to be added to the standard group and the fire group respectively according to the data of the early warning monitoring mode and after manual review, so that the accuracy of the data is greatly guaranteed, and the accuracy will not decrease with the passage of time. In the present invention, the smoke value is used as a control variable and obtained by a smoke sensor, which is conducive to timely discovery of hidden fire conditions. When the combustion is insufficient, when the fire is just started or even the high temperature is formed, the combustion is insufficient and smoke is generated, the fire condition cannot be easily observed from the surface at this time, but it can be judged from the smoke concentration value in the air. Even if the smoke concentration value is low and not easy to be observed, the signal can be quickly and keenly obtained by the smoke sensor, thereby providing an accurate judgment technical means. Compared with the prior art, the present invention not only has high detection accuracy, but also can continuously ensure the detection accuracy, and will not reduce the accuracy over time, thereby permanently ensuring the detection accuracy.

[0062] Among them, the early warning generation mode is used to determine the specific instantaneous state, the early warning monitoring mode is used to determine the state of a certain time period, and is used to determine the critical point, as well as to update the values ​​of the standard group and the fire group in long-term operation.

[0063] The scope of judgment in the early warning generation mode is larger and the judgment is relatively simple; the scope of judgment in the early warning monitoring mode is smaller and the judgment is more systematic.

[0064] See also Figure 1-Figure 7 , in some preferred embodiments, the detection system comprises a standard column A and a plurality of detection columns B;

[0065] The detection column B includes an outer cylinder 10, an inner cylinder 20, a fixing ring 50, an outer circular flow guide tube 30, an inner circular flow guide tube 40, a smoke sensor (not shown), and a controller with a communication module;

[0066] The inner cylinder 20 is sleeved in the outer cylinder 10, the fixing ring 50 is sleeved on the inner cylinder 20 and is placed at the bottom of the inner cylinder 20, and the inner cylinder 20 is fixedly connected to the outer cylinder 10 through the fixing ring 50; a plurality of fixing rings 50 are arranged in parallel;

[0067] The bottom end of the inner cylinder 20 is flush with the bottom end of the outer cylinder 10; the top end of the inner cylinder 20 is lower than the top end of the outer cylinder 10;

[0068] The plurality of outer circular flow guide pipes 30 are distributed in a circular array on the inner wall of the outer cylinder 10 to form a layer of outer circular flow guide pipes 30, and multiple layers of outer circular flow guide pipes 30 are formed in the outer cylinder 10;

[0069] A plurality of inner circular flow guide pipes 40 are arranged in a circular array on the outer wall of the inner cylinder 20 to form a layer of inner circular flow guide pipes 40, and multiple layers of inner circular flow guide pipes 40 are formed outside the inner cylinder 20;

[0070] An air flow inlet is formed on the outer wall of the outer cylinder 10 between the outer circular flow guide pipe 30 at the bottom layer and the fixing ring 50;

[0071] The standard column A includes the detection column and a plug 90; the plug 90 is fixedly mounted on the bottom end of the inner cylinder 20;

[0072] The smoke sensor is mounted on the controller, and the controller is mounted in the outer cylinder 10 .

[0073] As one of the main points that distinguish the present invention from the prior art, the detection system provided by the present invention has better coalfield smoke detection accuracy due to its unique structural design, so as to ensure the accuracy of detecting coalfield fire conditions.

[0074] In the present invention, the outer circular flow guide tube 30 is connected and fixed to the outer cylinder 10, so the heat of the outer cylinder 10 is transferred to the outer circular flow guide tube 30, and the inner circular flow guide tube 40 is connected and fixed to the inner cylinder 20, so the heat of the inner cylinder 20 is transferred to the inner circular flow guide tube 40. It should be noted that in the present invention, there is a gap between the outer circular flow guide tube 30 and the inner circular flow guide tube 40, and the outer circular flow guide tube 30 is not in direct contact with the inner circular flow guide tube 40, so the heat will not be directly transferred from the outer circular flow guide tube 30 to the inner circular flow guide tube 40, and the heat will not be directly transferred from the inner circular flow guide tube 40 to the outer circular flow guide tube 30. Although in the embodiment shown in the drawings, the wall surfaces of the outer circular flow guide tube 30 and the inner circular flow guide tube 40 are close, it does not mean that they are in direct contact. At least, there is a slit between the outer circular flow guide tube 30 and the inner circular flow guide tube 40. As a result, there is a phenomenon of uneven heat distribution in the space between the outer cylinder 10 and the inner cylinder 20, which promotes air flow. Since the temperature of the inner cylinder 20 is higher and the temperature of the outer cylinder 10 is lower when the coal field is heated or on fire, the air temperature is higher near the wall of the inner cylinder 20 and lower near the wall of the outer cylinder 10. Therefore, the outer circular guide tube 30 and the inner circular guide tube 40 provided in the present invention play a role in promoting air flow.

[0075] In addition, in the present invention, since multiple layers of outer circular flow guide tubes 30 and multiple layers of inner circular flow guide tubes 40 are provided, and each layer of outer circular flow guide tubes 30 and the inner circular flow guide tubes 40 of the same layer have the same length and the same height position, an internal circulation space is formed between each two adjacent layers of outer circular flow guide tubes 30 and between the outer cylinder 10 and the inner cylinder 20. In the internal circulation space, due to the difference in wall temperature between the outer cylinder 10 and the inner cylinder 20, the air not only flows upward, but also has an internal circulation, so that the probability of the smoke sensor detecting the smoke signal in the air is increased, and the smoke in the air can be detected more accurately.

[0076] The difference between the standard column and the test column is that the standard column has an additional plug 90 compared to the test column, and the rest of the structure is the same as the test column. The plug 90 is used to block the rising air in the inner cylinder 20, and the plug 90 is located at the bottom of the inner cylinder 20, so that the hot air from the ground in the entire inner cylinder 20 is isolated. Therefore, the temperature of the outer cylinder 10 is consistent or close to that of the inner cylinder 20, and therefore, in the standard column, the internal circulation is weak or even negligible, and there is mainly rising hot air.

[0077] The significance of setting up standard columns and detection columns with different structures in this way is to set up a control structure to obtain smoke values ​​under different conditions, thereby making it easier to judge and thus improving the accuracy of detection.

[0078] In some preferred embodiments, the detection system further comprises a power supply, which is electrically connected to the controller and is used to provide electrical energy to the smoke sensor, the communication module and the controller respectively.

[0079] In some preferred embodiments, the power source is an external power cord that supplies power through a power grid.

[0080] In some preferred embodiments, the power source is a solar cell assembly, which supplies energy to a battery through a solar panel, and the battery is then used as a power supply element to provide electrical energy to the smoke sensor, the communication module, and the controller.

[0081] In some preferred embodiments, the outer circular flow guide tube 30 and the inner circular flow guide tube 40 have the same diameter. The same diameter here means that the outer diameter is the same, the inner diameter is the same, and the length of the outer circular flow guide tube 30 and the inner circular flow guide tube 40 located on the same layer is also the same.

[0082] In some preferred embodiments, the detection column further includes a flow guide tube 70, which is disposed obliquely downward and fixedly connected to the air flow inlet;

[0083] The outer wall of the outer cylinder 10 is formed with two air flow inlets, and the angle between the two air flow inlets is 90 degrees; the two air flow inlets are respectively installed with the guide pipes 70, and the angle between the two guide pipes 70 is 90 degrees.

[0084] The air guide 70 is used to guide the external air to flow into the outer cylinder 10. The opening of the air guide 70 faces downward, so as to better obtain the air rising outside the outer cylinder 10.

[0085] like Figure 4 As shown, the angle between the two air guide tubes 70 is 90 degrees, so that external air can only enter from the two air guide tubes 70, and the angle between the two air guide tubes 70 is limited to 90 degrees, so that the air entering from the two air guide tubes 70 will not have a significant impact. If four air guide tubes 70 are provided, or the angle between the two air guide tubes 70 is 180 degrees, then the air entering the outer cylinder 10 through at least two air guide tubes 70 will have a certain impact, and the air intake in at least one direction will be hindered, which will affect the accuracy of the detection. In the scheme of the present invention, the angle between the two air guide tubes 70 is 90 degrees, so that the accuracy of the detection can be improved. It should be noted that the angle between the two air guide tubes 70 in the present invention is 90 degrees, which is based on the attached Figure 4 The arrangement state of the two guide pipes 70 is as shown in FIG. Figure 1-4 shown.

[0086] In some preferred embodiments, the detection column further includes a stabilizing rod 60, which is disposed transversely and has one end fixedly connected to the bottom of the outer cylinder 10;

[0087] The plurality of stabilizing rods 60 are evenly distributed on the outer wall of the outer cylinder 10 .

[0088] In the present invention, the bottom end of the detection column needs to be inserted into the coalfield, and the stabilizing rod 60 can be provided to better stably install the detection column in the coalfield.

[0089] In some preferred embodiments, the length of each layer of the outer circular flow guide tube 30 is the same as the length of each layer of the inner circular flow guide tube 40;

[0090] The lengths of the multiple layers of outer circular flow guide tubes 30 increase from bottom to top, and the lengths of the multiple layers of inner circular flow guide tubes 40 increase from bottom to top.

[0091] The length increases gradually, so that the amount of heat conduction can be gradually changed. Since the closer to the top of the outer cylinder 10, the lower the heat, and the closer to the bottom of the outer cylinder 10, the higher the heat, the longer the outer circular flow guide tube is, the more surface area it conducts heat, and the more heat it conducts, thereby better ensuring the consistency of the heat conducted at the top of the outer cylinder 10 and the heat conducted at the bottom of the outer cylinder 10. The same is true for the inner circular flow guide tube.

[0092] In some preferred embodiments, the controller is installed on the inner wall of the outer cylinder 10 and is located between the outer circular flow guide pipe 30 of the highest layer and the outer circular flow guide pipe 30 of the adjacent layer.

[0093] In the above-mentioned embodiments, the only difference between the detection column and the standard column is that the standard column has an additional plug 90, and the rest of the structures are the same. In other words, in each embodiment, the standard column in the embodiment has the same structure as the detection column in the embodiment, and has an additional plug 90.

[0094] The above embodiment is one of the important improvements of the present invention, which mainly describes a detection system used in the present invention to more accurately obtain smoke signals. In combination with the detection system, another improvement of the present invention is to improve the detection method, which also improves the accuracy of detection, as follows.

[0095] See also Figure 1-Figure 8 ,exist Figure 8 In the distribution state shown, the standard column A is located in the center, and the four detection columns B are evenly distributed around the standard column A.

[0096] In some preferred embodiments, smoke values ​​are obtained by a smoke sensor on a detection column, and a measured set is obtained;

[0097] The smoke value is obtained through the smoke sensor on the standard column A, and a standard group under the standard state and a fire group under the fire state are obtained respectively.

[0098] In some preferred embodiments, in the early warning monitoring mode, horizontal data comparison and vertical data comparison are performed respectively;

[0099] The horizontal data comparison comprises the steps of:

[0100] First, compare the measured group data obtained from the plurality of detection columns B one by one to find the measured group value of the detection column B with the highest value;

[0101] Secondly, taking the detection column with the highest value as the center of the circle, analyze the value change trend of the detection columns around it to determine whether the measured values ​​around it show a downward trend one by one; if so, an alarm prompt is issued; if not, a normal state prompt is issued;

[0102] The longitudinal data comparison includes:

[0103] The measured values ​​of a single detection column within a fixed time interval are counted and the average value is obtained as the longitudinal comparison number of the single detection column. The continuous longitudinal comparison numbers of the single detection column are continuously compared and the continuous longitudinal comparison numbers are compared with the standard group and the fire group respectively.

[0104] If the longitudinal comparison number is between the standard group and the fire group, the longitudinal comparison number is recorded and saved; the longitudinal comparison number is recorded multiple times continuously to obtain a longitudinal comparison array;

[0105] According to the longitudinal comparison array, a curve is drawn with time as the horizontal axis and multiple consecutive longitudinal comparison numbers at the time of fire, and any value in the middle that is smaller than the fire group is set as the critical point;

[0106] Compare the latest measured group data of any detection column with its most recently recorded measured group data. If it increases and is less than the critical point value, it indicates a normal state; if it increases and is greater than the critical point value, it is judged as a fire warning.

[0107] In some preferred embodiments, after longitudinal data comparison, if the conclusion is a fire warning, then the actual measurement groups of multiple detection columns closest to the detection column are judged one by one, and if at least one conclusion is a fire warning, a fire prompt is issued;

[0108] If there is no conclusion of fire warning, a misjudgment risk reminder will be issued.

[0109] In some preferred embodiments, the critical points are adjusted and the standard group and the fire group are updated.

[0110] Through the monitoring method in the above embodiment, by comparing the data, it is determined whether the critical point has been reached, thereby determining whether a fire has occurred; and by comparing the detection data with the curve, the change trend of the current data is determined to determine whether there is a risk of fire. Thus, it is possible to predict whether there is a problem of fire.

[0111] Therefore, in the above-mentioned embodiments of the present invention, the role of risk prediction can be achieved.

[0112] Compared with the prior art, the present invention can monitor more accurately and has a predictive function, with high detection precision and accuracy.

[0113] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A fire early warning monitoring method for exposed coal fields, characterized in that: include: Setting an early warning generation mode and an early warning monitoring mode; wherein the data of the early warning generation mode is obtained by the detection system; In the early warning generation mode, a standard group and a fire group are set; the smoke values ​​of the measured group and the standard group are compared, and the smoke values ​​of the measured group and the fire group are compared; if the smoke value of the measured group is greater than that of the standard group and less than that of the fire group, it is judged to be a normal state; if the smoke value of the measured group is greater than that of the fire group, it is judged to be a fire state; After the values ​​obtained in the early warning monitoring mode are manually reviewed, the data are added to the standard group and the fire group respectively; The data of the standard group, the measured group and the fire group are respectively obtained through the detection system.

2. The fire early warning monitoring method for exposed coalfield according to claim 1 is characterized in that: The detection system includes a standard column and a plurality of detection columns; The detection column includes an outer cylinder, an inner cylinder, a fixing ring, an outer circular flow guide tube, an inner circular flow guide tube, a smoke sensor, and a controller with a communication module; The inner cylinder is sleeved in the outer cylinder, the fixing ring is sleeved on the inner cylinder and placed at the bottom of the inner cylinder, and the inner cylinder is fixedly connected to the outer cylinder through the fixing ring; a plurality of fixing rings are arranged in parallel; The bottom end of the inner cylinder is flush with the bottom end of the outer cylinder; the top end of the inner cylinder is lower than the top end of the outer cylinder; A plurality of the outer circular flow guide pipes are distributed in a circular array on the inner wall of the outer cylinder to form a layer of outer circular flow guide pipes, and multiple layers of outer circular flow guide pipes are formed in the outer cylinder; A plurality of inner circular flow guide pipes are arranged in a circular array on the outer wall of the inner cylinder to form a layer of inner circular flow guide pipes, and multiple layers of inner circular flow guide pipes are formed outside the inner cylinder; An air flow inlet is formed on the outer wall of the outer cylinder between the outer circular flow guide pipe at the bottom layer and the fixing ring; The standard column includes the detection column and a plug; the plug is fixedly mounted on the bottom end of the inner cylinder; The smoke sensor is mounted on the controller, and the controller is mounted in the outer cylinder.

3. The fire early warning monitoring method for exposed coalfield according to claim 2 is characterized in that: The detection column also includes a flow guide tube, which is arranged obliquely downward and fixedly connected to the air flow inlet; The outer wall of the outer cylinder is formed with two air flow inlets, and the angle between the two air flow inlets is 90 degrees; the two air flow inlets are respectively installed with the guide pipes, and the angle between the two guide pipes is 90 degrees.

4. The fire early warning monitoring method for exposed coalfield according to claim 2 is characterized in that: The detection column also includes a stabilizing rod, which is arranged transversely and has one end fixedly connected to the bottom of the outer cylinder; The plurality of stabilizing rods are evenly distributed on the outer wall of the outer cylinder.

5. The fire early warning monitoring method for exposed coalfield according to any one of claims 2 to 4, characterized in that: The length of the outer circular flow guide pipe of each layer is the same as the length of the inner circular flow guide pipe of each layer; The lengths of the multiple layers of outer circular flow guide pipes increase from bottom to top, and the lengths of the multiple layers of inner circular flow guide pipes increase from bottom to top.

6. The fire early warning monitoring method for exposed coalfield according to claim 5 is characterized in that: The controller is installed on the inner wall of the outer cylinder and is located between the outer circular flow guide pipe of the highest layer and the outer circular flow guide pipe of the adjacent layer.

7. The fire early warning monitoring method for exposed coalfield according to claim 6 is characterized in that: The smoke value is obtained by the smoke sensor on the detection column, and the actual measurement group is obtained; The smoke value is obtained through the smoke sensor on the standard column, and a standard group under the standard state and a fire group under the fire state are obtained respectively.

8. The fire early warning monitoring method for exposed coalfield according to claim 6 is characterized by: In the early warning monitoring mode, horizontal data comparison and vertical data comparison are performed respectively; The horizontal data comparison comprises the steps of: First, the measured group data obtained from the plurality of detection columns are compared one by one to find the measured group value of the detection column with the highest value; Second, taking the detection column with the highest value as the center of the circle, analyze the value change trend of the detection columns around it to determine whether the measured values ​​around it show a downward trend one by one; If so, an alarm is issued; If not, a normal status prompt is given; The longitudinal data comparison includes: The measured values ​​of a single detection column within a fixed time interval are counted and the average value is obtained as the longitudinal comparison number of the single detection column. The continuous longitudinal comparison numbers of the single detection column are continuously compared and the continuous longitudinal comparison numbers are compared with the standard group and the fire group respectively. If the longitudinal comparison number is between the standard group and the fire group, the longitudinal comparison number is recorded and saved; the longitudinal comparison number is recorded multiple times continuously to obtain a longitudinal comparison array; According to the longitudinal comparison array, a curve is drawn with time as the horizontal axis and multiple consecutive longitudinal comparison numbers at the time of fire, and any value in the middle that is smaller than the fire group is set as the critical point; Compare the latest measured group data of any detection column with its most recently recorded measured group data. If it increases and is less than the critical point value, it indicates a normal state; if it increases and is greater than the critical point value, it is judged as a fire warning.

9. The fire early warning monitoring method for exposed coalfield according to claim 8, characterized in that: After longitudinal data comparison, if the conclusion is a fire warning, the actual measurement groups of multiple test columns closest to the test column are judged one by one. If at least one conclusion is a fire warning, a fire prompt is issued; If there is no conclusion of fire warning, a misjudgment risk reminder will be issued.

10. The fire early warning monitoring method for exposed coalfield according to claim 8, characterized in that: Adjustments are made to critical points and the standard and fire groups are updated.

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