Goaf temperature monitoring device and method and readable storage medium

Abstract

The invention discloses a goaf temperature monitoring device and method and a readable storage medium, and belongs to the field of goaf temperature monitoring. The problems that the signal transmission distance of an existing goaf temperature monitoring device is limited, signals are prone to being shielded, and the signal conversion precision is not high are solved. According to the technical scheme, the goaf temperature monitoring device comprises a sound collector and a drill hole formed in a goaf, a hole protection steel pipe is placed in the drill hole, a temperature monitoring device is arranged on the hole protection steel pipe, the sound collector is electrically connected with an upper computer, and the upper computer is electrically connected with the sound collector. According to the goaf temperature monitoring method, the goaf temperature monitoring device is adopted, the risk that a steel pipe shields signals is effectively avoided, it is ensured that the signals are not lost in the transmission process, and the accuracy of monitored temperature is improved; the goaf temperature monitoring method is executed when a computer program is operated; the method is applied to goaf temperature monitoring.

Description

Technical Field

[0001] The present invention provides a goaf temperature monitoring device, method and readable storage medium, belonging to the technical field of goaf temperature monitoring and fire prevention and extinguishing. Background Art

[0002] During the coal mining process, the temperature monitoring of the goaf is an important link to ensure the safe production of the mine. Due to the complex underground environment of coal mines, there are flammable and explosive substances such as gas and coal dust. Once a fire or spontaneous combustion accident occurs, it will seriously threaten the lives of miners and the production safety of the mine. Therefore, realizing the real-time monitoring and early warning of the goaf temperature is of great significance for preventing and controlling coal mine fires. Most of the traditional goaf temperature monitoring methods use wired sensors, but these sensors are arranged inside the pipeline of the hole protection steel pipe, which are easily damaged in a harsh environment, and the wiring is complex and the maintenance cost is high. When it is found that there is a fire area and fire prevention and extinguishing work such as grouting is carried out through the inside of the pipeline, the slurry is easy to damage the sensor line, resulting in the inability to monitor the temperature change of the fire area inside the goaf in real time. In recent years, with the development of wireless sensor networks, temperature monitoring systems based on wireless transmission have gradually become a research hotspot. However, these systems still have some problems, such as limited signal transmission distance, easy signal shielding and low signal conversion accuracy. Summary of the Invention

[0003] In order to solve the technical problems of the limited signal transmission distance, easy signal shielding and low signal conversion accuracy of the existing goaf temperature monitoring device, the present invention provides a goaf temperature monitoring device, method and readable storage medium, aiming 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 combined connection of the hardware modules and / or circuits, and ensuring that the goaf temperature monitoring device is not easily damaged during the fire prevention and extinguishing work.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a goaf temperature monitoring device, characterized in that it includes a sound collector and a borehole arranged in the goaf, a hole protection steel pipe is placed in the borehole, a temperature monitoring component is arranged on the hole protection steel pipe, and the sound collector is electrically connected to the upper computer; The temperature monitoring component includes a thermocouple, the measuring end of the thermocouple is arranged on the inner wall of the hole protection steel pipe, and the free end of the thermocouple is electrically connected to the non-inverting input end of the voltage amplifier; the output end of the voltage amplifier is electrically connected to the inverting input end of the voltage amplifier and an electromagnetic rotation driving device, the electromagnetic rotation driving device includes an electric wheel, the electric wheel and the hole protection steel pipe cooperate with each other, and the sound collector is used for collecting the sound signal output after the electric wheel and the hole protection steel pipe cooperate with each other.

[0005] 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; a downstream load resistor is connected in series between the output terminal and the inverting input terminal of the voltage amplifier.

[0006] Further, a sandwich layer is provided on the pipe wall of the hole protecting steel pipe, and the temperature monitoring component is fixedly connected inside the sandwich layer of the hole protecting steel pipe.

[0007] Further, an external power supply is connected in series between the positive power supply terminal and the negative power supply terminal of the voltage amplifier.

[0008] Further, the thermocouple, the inverting input terminal of the voltage amplifier, the negative power supply terminal of the voltage amplifier, and the electromagnetic rotation driving device are all electrically connected to a ground wire, and the ground wire is connected to the gob area.

[0009] Further, the model of the electromagnetic rotation driving device is YB T 4342-2013.

[0010] A gob area temperature monitoring method uses the above-mentioned gob area temperature monitoring device.

[0011] A readable storage medium stores a computer program thereon, and when the computer program is run, it executes the above-mentioned gob area temperature monitoring method.

[0012] The beneficial effects of the present invention compared with the prior art are as follows: 1. Through the mutual cooperation of the electromagnetic rotation driving device, the hole protecting steel pipe, and the sound collector, the present invention converts the temperature signal in the gob area into a sound frequency signal, and reflects the temperature change situation in the gob area through the upper computer. Compared with the traditional gob area temperature monitoring device, the gob area temperature monitoring device of the present invention effectively avoids the risk of signal shielding by the steel pipe, ensures that the signal is not lost during transmission, and improves the accuracy of the monitored temperature. 2. The temperature monitoring component of the present invention is fixed on the hole protecting steel pipe, and the temperature monitoring component can directly enter the drill hole in the gob area along with the hole protecting steel pipe, simplifying the installation process and improving the stability and durability of temperature monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following further describes the present invention with reference to the drawings: Figure 1 is the temperature monitoring device of the present invention; Figure 2 is a schematic diagram of the relative position relationship between the temperature monitoring device of the present invention and the gob area; 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 rotation drive device, 8 is a measurement end, 9 is a free end, 10 is a ground wire, 11 is a protection resistor, 12 is a non-inverting input terminal, 13 is a downstream load resistor, 15 is an electric wheel, 16 is a steel pipe for protecting holes, 17 is a sound collector, and 18 is a host computer. Detailed implementation manners

[0014] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are relative orientation or positional relationships, 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 thus cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0015] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0016] As Figures 1 to 2 shown, the present invention provides a gob temperature monitoring device, including a sound collector 17 and a borehole opened in the gob. A steel pipe 16 for protecting holes is placed in the borehole. The pipe wall of the steel pipe 16 for protecting holes is a sandwich structure, and a temperature monitoring component 1 is poured in the sandwich of the steel pipe 16 for protecting holes, so that the temperature monitoring component 1 and the steel pipe 16 for protecting holes form an integral structure. The temperature monitoring component 1 and the steel pipe 16 for protecting holes enter the gob 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 gob.

[0017] The sound collector 17 is used to collect the sound frequency signal generated after the interaction between the temperature monitoring component 1 and the hole protection steel pipe 16. The sound collector 17 includes an analog-to-digital conversion module and a noise reduction module, which can convert the sound frequency signal into an electrical signal. The sound collector 17 is electrically connected to a host computer 18, and uploads the electrical signal to the host computer 18. After analysis and processing by the host computer 18, the temperature condition of the gob area is obtained. Compared with traditional wireless sensors, the gob area temperature monitoring device of the present invention can avoid the transmission signal being shielded by the steel pipe, thereby reducing the monitoring error. The noise reduction module can eliminate interference noise. The analog-to-digital conversion module and the noise reduction module are conventional technical means in the art and will not be elaborated here.

[0018] The temperature monitoring component 1 includes a thermocouple 2, which is used to monitor the temperature signal of the gob area and convert the temperature signal into a first voltage signal. The measuring end 8 of the thermocouple 2 passes through the pipe wall of the hole protection steel pipe 16 and extends into the drill hole. The free end 9 of the thermocouple 2 is electrically connected to the non-inverting input terminal 12 of the voltage amplifier 4 through a cable 3. A protection 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. The thermocouple 2 is also electrically connected to a ground wire 10.

[0019] Specifically, the gob area temperature difference that causes the thermocouple 2 to generate a voltage is: ΔT = T - T 0 ; In the formula, ΔT is the gob area temperature difference, T is the real-time temperature of the gob area, T 0 is the average temperature of the gob area without spontaneous combustion.

[0020] Calculate the first voltage signal according to the gob area temperature difference that causes the thermocouple 2 to generate a voltage V 1 : V 1 =k 1 •ΔT ; In the formula, V 1 is the first voltage signal, k 1 is the first proportional coefficient, ΔT is the gob area temperature difference.

[0021] The output terminal of the voltage amplifier 4 is electrically connected to the inverting input terminal of the voltage amplifier 4 and the voltage input terminal of the electromagnetic rotation drive device 7 through the cable 3. The electromagnetic rotation drive device 7 is electrically connected to the ground wire 10. 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, and the inverting input terminal of the voltage amplifier 4 is electrically connected to the ground wire 10. An external power supply 5 is connected in series between the positive power supply terminal and the negative power supply terminal of the voltage amplifier 4. The negative power supply terminal of the voltage amplifier 4 is electrically connected to the ground wire 10, and the ground wire 10 is connected to the goaf.

[0022] The electromagnetic rotation drive device 7 includes an electric wheel 15. The electric wheel and the hole protection steel pipe cooperate with each other. 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. 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 terminal of the electromagnetic rotation drive device 7 to drive the electric wheel 15 to rotate and vibrate.

[0023] Specifically, the expression for obtaining the second voltage signal from the first voltage signal is: V 2 =k 2 •V 1 =k 1 •k 2 •ΔT ; In the formula, V 2 is the second voltage signal, k 2 is the second proportionality coefficient, k 1 is the first proportionality coefficient, ΔT is the temperature difference in the goaf.

[0024] The second voltage signal is transmitted to the electric wheel 15 to control the rotation of the electric wheel 15. During the rotation of the electric wheel 15, it vibrates and collides with the hole protection steel pipe 16, thereby generating a sound frequency signal, achieving the purpose of converting the temperature signal into a sound frequency signal. The sound frequency signal is transmitted out of the goaf by the hole protection steel pipe 16. The sound collector 17 located outside the goaf captures the sound frequency signal and transmits it to the host computer 18, achieving the purpose of real-time monitoring of the temperature change in the goaf.

[0025] There is a proportional relationship between the rotation vibration frequency of the electric wheel 15 and the voltage driving the rotation vibration of the electric wheel 15. The expression for the rotation vibration frequency of the electric wheel 15 can be obtained as: f = k 3•V 2 =k 1 •k 2 •k 3 •ΔT ; In the formula, f is the rotational vibration frequency of the electric wheel 15, k 3 is the third proportionality coefficient, V 2 is the second voltage signal, k 2 is the second proportionality coefficient, k 1 is the first proportionality coefficient, ΔT is the temperature difference in the gob area.

[0026] Preferably, the model of the electromagnetic rotary drive device 7 is YB T 4342-2013.

[0027] A gob area temperature monitoring method provided by the present invention uses the above-mentioned gob area temperature monitoring device.

[0028] A readable storage medium provided by the present invention stores a computer program on the readable storage medium, and when the computer program is run, it executes the above-mentioned gob area temperature monitoring method.

[0029] By converting the temperature signal into a sound frequency signal and using the sound frequency signal as a carrier to transmit data, the present invention avoids the hidden danger of signal shielding and reduces the monitoring error compared with using traditional sensors for gob area temperature monitoring. When the temperature in the gob area rises abnormally, the gob area temperature monitoring device of the present invention can respond quickly. When grouting, injecting water, etc. into the gob area through the casing pipe 16 for fire prevention and extinguishing, it can continue to monitor the temperature change in the gob area in real time without damaging the temperature monitoring component 1, and transmit the information to the upper computer 18 to enable the operator to monitor in real time in the safe area.

[0030] The working principle of the present invention is as follows: When the temperature in the gob area rises abnormally, 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 outputs a second voltage signal. The second voltage signal drives the electric wheel 15 of the electromagnetic rotary drive device 7 to rotate. When the electric wheel 15 rotates, it collides with the inner wall of the casing pipe 16 to generate a sound frequency signal. The sound frequency signal is transmitted through the casing pipe 16 to the sound collector 17. The analog-to-digital conversion module in the sound collector 17 converts the sound frequency signal into an electrical signal and then uploads it to the upper computer 18, thereby realizing the conversion of the temperature signal into an electrical signal.

[0031] Regarding the specific structure of the present invention, it should be noted that the connection relationships between the various component modules adopted by the present invention are definite and achievable. Except for the special descriptions in the embodiments, the specific connection relationships can bring corresponding technical effects and, on the premise of not relying on the execution of corresponding software programs, solve the technical problems proposed by the present invention. The models of the components, modules, and specific components, the connection methods between them, and the conventional usage methods and predictable technical effects brought by the above technical features, except for the specific descriptions, all belong to the publicly disclosed content in patents, journal papers, technical manuals, technical dictionaries, and textbooks that those skilled in the art can obtain before the filing date, or belong to the prior art such as the conventional techniques and common general knowledge in the art, and do not need to be elaborated. This makes the technical solution provided in this case clear, complete, and achievable, and can reproduce or obtain the corresponding physical product according to this technical means.

[0032] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some 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 invention.

Claims

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

2. The gob temperature monitoring device according to claim 1, characterized in that, A protection resistor (11) is also 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, wherein The pipe wall of the hole protection steel pipe (16) is provided with a sandwich layer. The temperature monitoring component (1) is fixedly connected in the sandwich layer of the hole protection steel pipe (16).

4. The gob 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 and the negative power supply terminal of the voltage amplifier (4).

5. The gob 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 rotation driving device (7) are all electrically connected to a ground wire (10). The ground wire (10) is connected to the gob area.

6. The gob temperature monitoring device according to claim 1, characterized in that, The model of the electromagnetic rotation driving device (7) is YB T 4342-2013.

7. A goaf temperature monitoring method, characterized in that Adopt a gob area temperature monitoring device according to any one of claims 1-6.

8. A readable storage medium, characterized in that, A computer program is stored on the readable storage medium. When the computer program is run, it executes a gob area temperature monitoring method according to claim 7.

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