A goaf temperature monitoring device, method and readable storage medium

Abstract

The application discloses a goaf temperature monitoring device and method and a readable storage medium, belongs to the goaf temperature monitoring field, solves the problems of limited signal transmission distance, easy signal shielding and low signal conversion precision of the existing goaf temperature monitoring device, and adopts the technical scheme that a goaf temperature monitoring device comprises a sound collector and a drill hole arranged in a goaf, a hole protection steel pipe is arranged in the drill hole, a temperature monitoring device is arranged on the hole protection steel pipe, the sound collector is electrically connected to an upper computer, and a goaf temperature monitoring method is adopted to effectively avoid the risk of signal shielding of the steel pipe, ensure that the signal is not lost in the transmission process, improve the accuracy of the monitored temperature, the readable storage medium stores a computer program, and the computer program is executed to perform the goaf temperature monitoring method; and the application is applied to goaf temperature monitoring.

Description

TECHNICAL FIELD

[0001] The application provides a goaf temperature monitoring device, method and readable storage medium, and belongs to the technical field of goaf temperature monitoring and fire prevention and extinguishing. BACKGROUND

[0002] In the process of coal mining, the temperature monitoring of the goaf is an important link to ensure the safety production of the mine. Due to the complex underground environment of the coal mine, there are flammable and explosive substances such as gas and coal dust, and once a fire or spontaneous combustion accident occurs, the life safety of the miners and the production safety of the mine will be seriously threatened. Therefore, realizing the real-time monitoring and early warning of the temperature of the goaf has important significance for preventing and controlling the coal mine fire. The traditional goaf temperature monitoring method mostly uses wired sensors, but these sensors are arranged in the pipeline inside the hole protection steel pipe, which is easily damaged in a harsh environment, and the wiring is complex and the maintenance cost is high. When the fire area is found, the mud used for grouting and other fire prevention and extinguishing work in the pipeline inside the hole protection steel pipe is easy to damage the sensor line and cause the temperature change of the internal fire area of the goaf to be unable to be monitored in real time. In recent years, with the development of wireless sensor networks, the temperature monitoring system based on wireless transmission has gradually become a research hotspot. However, these systems still have some problems, such as limited signal transmission distance, signal shielding and low signal conversion accuracy. SUMMARY

[0003] In order to solve the technical problems of the limited signal transmission distance, the signal shielding and the low signal conversion accuracy of the existing goaf temperature monitoring device, the application provides a goaf temperature monitoring device, method and readable storage medium, and the purpose is to realize the real-time and accurate monitoring of the temperature change of the goaf by improving the hardware structure of the goaf temperature monitoring device or improving the combination connection of the hardware modules and / or circuits, so that the goaf temperature monitoring device is not easy to be damaged when the fire prevention and extinguishing work is carried out.

[0004] In order to solve the above technical problems, the technical scheme adopted by the application is as follows: a goaf temperature monitoring device, characterized in that it comprises a sound collector and a drill hole arranged in the goaf, a hole protection steel pipe is placed in the drill hole, a temperature monitoring component is arranged on the hole protection steel pipe, and the sound collector is electrically connected to an upper computer.

[0005] The temperature monitoring component comprises a thermocouple, a measurement end of the thermocouple is arranged on the inner wall of the hole protection steel pipe, a free end of the thermocouple is electrically connected to the non-inverting input end of a voltage amplifier, the output end of the voltage amplifier is electrically connected to the inverting input end of the voltage amplifier and an electromagnetic rotary drive device, the electromagnetic rotary drive device comprises an electric wheel, the electric wheel and the hole protection steel pipe cooperate with each other, and the sound collector is used to collect the sound signal output after the electric wheel and the hole protection steel pipe cooperate with each other.

[0006] Further, a protection resistor is connected in series between the free end of the thermocouple and the non-inverting input terminal of the voltage amplifier; and a downstream load resistor is connected in series between the output terminal of the voltage amplifier and the inverting input terminal of the voltage amplifier.

[0007] Further, the pipe wall of the casing steel pipe is provided with a sandwich layer, and the temperature monitoring component is fixedly connected in the sandwich layer of the casing steel pipe.

[0008] Further, an external power supply is connected in series between the positive power supply terminal of the voltage amplifier and the negative power supply terminal of the voltage amplifier.

[0009] Further, the thermocouple, the inverting input terminal of the voltage amplifier, the negative power supply terminal of the voltage amplifier and the electromagnetic rotary driving device are all electrically connected with a ground wire, and the ground wire is connected to the goaf.

[0010] Further, the model of the electromagnetic rotary driving device is YB T 4342-2013.

[0011] A goaf temperature monitoring method using the goaf temperature monitoring device.

[0012] A readable storage medium, wherein a computer program is stored on the readable storage medium, and the computer program is executed to perform the goaf temperature monitoring method.

[0013] The present application has the following beneficial effects compared with the prior art:

[0014] 1. The electromagnetic rotary driving device, the casing steel pipe and the sound collector are cooperated with each other to convert the temperature signal in the goaf into a sound frequency signal, and the temperature change in the goaf is reflected by the upper computer, so that the risk of signal shielding by the steel pipe is effectively avoided, the signal is not lost in the transmission process, and the accuracy of the monitored temperature is improved.

[0015] 2. The temperature monitoring component is fixed on the casing steel pipe, and the temperature monitoring component can directly enter the drill hole in the goaf with the casing steel pipe, so that the installation process is simplified, and the stability and durability of the temperature monitoring are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below with reference to the drawings:

[0017] Figure 1 The temperature monitoring device of the present application;

[0018] Figure 2 The relative position relationship between the temperature monitoring device of the present application and the goaf;

[0019] In the figure: 1 is a temperature monitoring component, 2 is a thermocouple, 3 is a cable, 4 is a voltage amplifier, 5 is an external power supply, 7 is an electromagnetic rotary drive device, 8 is a measuring end, 9 is a free end, 10 is a ground wire, 11 is a protection resistor, 12 is a same-phase input end, 13 is a downstream load resistor, 15 is an electric wheel, 16 is a hole-protecting steel pipe, 17 is a sound collector, and 18 is an upper computer. DETAILED DESCRIPTION

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate relative or positional relationships, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0021] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] As shown in Figures 1 to 2 The present application provides a goaf temperature monitoring device, which comprises a sound collector 17 and a drill hole opened in the goaf, and a hole-protecting steel pipe 16 is placed in the drill hole. The pipe wall of the hole-protecting steel pipe 16 is a sandwich structure, and a temperature monitoring component 1 is cast in the sandwich of the hole-protecting steel pipe 16, so that the temperature monitoring component 1 and the hole-protecting steel pipe 16 form an integrated structure. The temperature monitoring component 1 and the hole-protecting steel pipe 16 enter the goaf together, which not only simplifies the installation process, but also enables the temperature monitoring component 1 to stably and durably monitor the temperature change in the goaf.

[0023] The sound collector 17 is used for collecting the sound frequency signal generated after the temperature monitoring component 1 interacts with the casing pipe 16, and the sound collector 17 comprises an analog-digital conversion module and a noise reduction module, and can convert the sound frequency signal into an electric signal, the sound collector 17 is electrically connected with the upper computer 18, the electric signal is uploaded to the upper computer 18, and the temperature condition of the goaf is obtained after the upper computer 18 analyzes and processes. Compared with the traditional wireless sensor, the goaf temperature monitoring device can avoid that the transmission signal is shielded by the casing pipe, so that the monitoring error is reduced. The noise reduction module can eliminate interference noise. The analog-digital conversion module and the noise reduction module are conventional technical means in the field, and will not be repeated here.

[0024] The temperature monitoring component 1 comprises a thermocouple 2, which is used for monitoring the temperature signal of the goaf and converting the temperature signal into a first voltage signal, the measuring end 8 of the thermocouple 2 penetrates the pipe wall of the casing pipe 16 and extends into the borehole, the free end 9 of the thermocouple 2 is electrically connected to the non-inverting input end 12 of the voltage amplifier 4 through the cable 3, the protection resistor 11 is connected in series between the free end 9 of the thermocouple 2 and the non-inverting input end 12 of the voltage amplifier 4, and the thermocouple 2 is also electrically connected with the ground wire 10.

[0025] Specifically, the goaf temperature difference for the thermocouple 2 to generate voltage is:

[0026] ΔT = T - T 0 ;

[0027] In the formula, ΔT is the goaf temperature difference, T is the real-time temperature of the goaf, T 0 is the average temperature of the goaf without spontaneous combustion.

[0028] The first voltage signal is calculated according to the goaf temperature difference for the thermocouple 2 to generate voltage V 1 :

[0029] V 1 =k 1 • ΔT ;

[0030] In the formula, V 1 is the first voltage signal, k 1 is the first proportional coefficient, ΔT is the goaf temperature difference.

[0031] The output end of the voltage amplifier 4 is electrically connected with the inverting input end of the voltage amplifier 4 and the voltage input end of the electromagnetic rotary driving device 7 through the cable 3, and the electromagnetic rotary driving device 7 is electrically connected with the ground wire 10. The downstream load resistor 13 is connected in series between the output end of the voltage amplifier 4 and the inverting input end of the voltage amplifier 4, and the inverting input end of the voltage amplifier 4 is electrically connected with the ground wire 10. The external power supply 5 is connected in series between the positive power supply end of the voltage amplifier 4 and the negative power supply end of the voltage amplifier 4, and the negative power supply end of the voltage amplifier 4 is electrically connected with the ground wire 10, and the ground wire 10 is connected to the goaf.

[0032] The electromagnetic rotary driving device 7 comprises an electric wheel 15, and the electric wheel and the hole-protecting steel pipe are matched with each other, and the sound collector is used to collect the sound signal output after the electric wheel and the hole-protecting steel pipe are matched with each other. Specifically, the voltage amplifier 4 amplifies the first voltage signal collected and output by the thermocouple 2 to obtain a second voltage signal, and the second voltage signal is output to the voltage input end of the electromagnetic rotary driving device 7 to drive the electric wheel 15 to rotate and vibrate.

[0033] Specifically, the expression of the second voltage signal obtained according to the first voltage signal is:

[0034] V 2 =k 2 •V 1 =k 1 •k 2 • ΔT ;

[0035] In the formula, V 2 is the second voltage signal, k 2 is the second proportional coefficient, k 1 is the first proportional coefficient, ΔT is the temperature difference of the goaf.

[0036] The second voltage signal is transmitted to the electric wheel 15 to control the rotation of the electric wheel 15, and the electric wheel 15 vibrates in the rotation process and collides with the hole-protecting steel pipe 16, so as to generate a sound frequency signal, thereby achieving the purpose of converting the temperature signal into the sound frequency signal. The sound frequency signal is transmitted out of the goaf by the hole-protecting steel pipe 16, and the sound collector 17 located outside the goaf captures the sound frequency signal and transmits it to the upper computer 18, thereby achieving the purpose of real-time monitoring of the temperature change of the goaf.

[0037] The rotation vibration frequency of the electric wheel 15 is proportional to the voltage for driving the rotation vibration of the electric wheel 15, and the expression of the rotation vibration frequency of the electric wheel 15 is:

[0038] f = k 3 •V 2 =k 1 •k 2 •k 3 • ΔT ;

[0039] In the formula, f is the rotation vibration frequency of the electric wheel 15, k 3 is the third proportional coefficient, V 2 is the second voltage signal, k 2 is the second proportional coefficient, k 1 is the first proportional coefficient, ΔT is the temperature difference of the goaf.

[0040] Preferably, the model of the electromagnetic rotary driving device 7 is YB T 4342-2013.

[0041] The application provides a goaf temperature monitoring method.

[0042] The application provides a readable storage medium, which has a computer program stored thereon, and the computer program is used to execute the goaf temperature monitoring method.

[0043] The application converts the temperature signal into a sound frequency signal, uses the sound frequency signal as a carrier to transmit data, avoids the hidden danger that the signal is shielded, reduces the monitoring error, and when the temperature of the goaf abnormally rises, the goaf temperature monitoring device can quickly respond, when the hole protection steel pipe 16 is used to inject grouting, water injection and the like into the goaf to prevent and extinguish fire, the temperature monitoring component 1 can be ensured to be not damaged, the temperature change of the goaf can be continuously monitored in real time, information can be transmitted to the upper computer 18, and the operator can realize real-time monitoring in the safety area.

[0044] The working principle of the application is as follows:

[0045] When the temperature of the goaf abnormally rises, the thermocouple 2 of the temperature monitoring component 1 converts the collected abnormal temperature into a first voltage signal, the first voltage signal is amplified by the voltage amplifier 4 and then a second voltage signal is output, the second voltage signal drives the electric wheel 15 of the electromagnetic rotary driving device 7 to rotate, when the electric wheel 15 rotates, the pipe wall of the hole-protecting steel pipe 16 is collided to generate a sound frequency signal, the sound frequency signal is transmitted to the sound collector 17 through the hole-protecting steel pipe 16, the sound frequency signal is converted into an electric signal by the analog-digital conversion module in the sound collector 17 and then uploaded to the upper computer 18, so that the temperature signal is converted into an electric signal.

[0046] It should be noted that the connection relationship between the components and modules of the present application is determined and can be realized. Except for the special description in the examples, the specific connection relationship can bring corresponding technical effects, and based on the premise of not relying on the corresponding software program execution, the technical problems proposed by the present application are solved. The model of the components, modules, specific components, the connection mode between them, and the conventional use method and the expected technical effects brought by the above technical features, except for the specific description, belong to the public content disclosed in the patents, journal papers, technical manuals, technical dictionaries, textbooks, etc. before the application date, or belong to the existing technology of the conventional technology and common knowledge in the art, and do not need to be described. The technical solutions provided in the present application are clear, complete, and can be realized, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0047] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A temperature monitoring device for goaf areas, characterized in that, It includes a sound collector (17) and a borehole set in the goaf area. A protective steel pipe (16) is placed in the borehole. A temperature monitoring component (1) is set on the protective steel pipe (16). The sound collector (17) is electrically connected to the host computer (18). The temperature monitoring component (1) includes a thermocouple (2), the measuring end (8) of the thermocouple (2) is set on the inner wall of the protective steel pipe (16), and the free end (9) of the thermocouple (2) is electrically connected to the non-inverting input end (12) of the voltage amplifier (4); the output end of the voltage amplifier (4) is electrically connected to the inverting input end of the voltage amplifier (4) and the electromagnetic rotation drive device (7), the electromagnetic rotation drive device (7) includes an electric wheel (15), the electric wheel (15) and the protective steel pipe (16) cooperate with each other, and the sound collector (17) is used to collect the sound signal output after the electric wheel (15) and the protective steel pipe (16) cooperate with each other.

2. The goaf temperature monitoring device according to claim 1, characterized in that, A protective resistor (11) is connected in series between the free end (9) of the thermocouple (2) and the non-inverting input terminal (12) of the voltage amplifier (4); a downstream load resistor (13) is connected in series between the output terminal of the voltage amplifier (4) and the inverting input terminal of the voltage amplifier (4).

3. The goaf temperature monitoring device according to claim 1, characterized in that, The wall of the protective steel pipe (16) is provided with a sandwich layer, and the temperature monitoring component (1) is fixedly connected to the sandwich layer of the protective steel pipe (16).

4. The goaf temperature monitoring device according to claim 1, characterized in that, An external power supply (5) is connected in series between the positive power supply terminal of the voltage amplifier (4) and the negative power supply terminal of the voltage amplifier (4).

5. A goaf temperature monitoring device according to claim 1, characterized in that, The thermocouple (2), the inverting input terminal of the voltage amplifier (4), the negative power supply terminal of the voltage amplifier (4), and the electromagnetic rotary drive device (7) are all electrically connected to a ground wire (10), which is connected to the goaf area.

6. A goaf temperature monitoring device according to claim 1, characterized in that, The electromagnetic rotary drive device (7) is model YB T 4342-2013.

7. A method for monitoring temperature in a goaf, characterized in that, The goaf temperature monitoring device described in any one of claims 1-6 is adopted.

8. A readable storage medium, characterized in that, The readable storage medium stores a computer program, which, when executed, performs a goaf temperature monitoring method as described in claim 7.

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