Wireless monitoring system and method for measuring temperature of mine belt in real time

Abstract

The invention provides a wireless monitoring system and method for measuring the temperature of a mine belt in real time, and the system comprises a plurality of intelligent wireless collection instruments which are located in a belt lane and above a belt, and every two adjacent intelligent wireless collection instruments are spaced by a certain distance; each belt local temperature monitoring module comprises heat conduction resin located in a belt rubber layer and a flexible temperature sensor located in a belt fabric layer, and the temperature of the surface layer of the belt is transmitted to the flexible temperature sensor through the heat conduction resin; the intelligent wireless acquisition instrument transmits the obtained local temperature signal of the belt to the belt protection device, and the belt protection device monitors the local temperature of the belt in real time according to the received temperature signal; and the belt early warning platform is used for displaying the belt temperature in real time, judging the grade and position of a belt fire disaster, sending out alarm information and controlling the start and stop of the belt protection device. According to the technical scheme, the problem that early warning cannot be carried out on the temperature of the mine belt in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of mine belt temperature monitoring, and in particular to a wireless monitoring system and method for real-time measurement of mine belt temperature. Background Art

[0002] 2 Coal production is mainly transported from the mine to the ground through the mine conveyor belt. The belt conveyor has the advantages of large transportation capacity, long transportation distance, and low electromechanical accident rate, so it has become one of the most important transportation equipment in the coal industry. The underground environment of coal mines is complex. When the conveyor belt is running abnormally due to insufficient tension, excessive load, or stuck rollers, it will cause the conveyor belt to slip with the roller or roller, causing friction on the contact surface; continuous friction will cause heat to accumulate on the contact surface, causing the conveyor belt to continue to heat up; when the temperature rises to a certain stage, the high-temperature conveyor belt molten particles or sparks will splash out, which may ignite combustibles such as floating coal near the conveyor belt; when the combustibles release enough heat, the conveyor belt will continue to heat up until it reaches the open flame stage, eventually causing a serious conveyor belt fire accident.

[0003] At present, my country's coal mines mainly use external temperature sensors, CO sensors, smoke sensors and other sensing technologies to achieve fire monitoring and early warning. However, due to the influence of installation location and measurement accuracy, external temperature sensors cannot achieve the purpose of early fire forecasting; CO concentration produced by conveyor belt oxidation does not change significantly in the early stage, and the oxidation of coal blocks during coal mining will also produce CO gas, which interferes with CO gas early warning of conveyor belt fire; smoke gas can only be detected when the conveyor belt fire develops to a certain scale, at which time the conveyor belt has reached a high temperature stage, so there is a lag in early warning.

[0004] Therefore, there is a need for a wireless monitoring system and method for real-time measurement of mine belt temperature that can provide early warning of mine belt temperature. Summary of the invention

[0005] The main purpose of the present invention is to provide a wireless monitoring system and method for measuring the temperature of a mine belt in real time, so as to solve the problem that the prior art cannot provide an early warning of the temperature of the mine belt.

[0006] To achieve the above object, the present invention provides a wireless monitoring system for real-time measurement of mine belt temperature, comprising:

[0007] Multiple intelligent wireless collectors are located in the belt lane and above the belt, with a certain distance between two adjacent intelligent wireless collectors;

[0008] Multiple belt local temperature monitoring modules, including: thermally conductive resin located in the belt rubber layer and a flexible temperature sensor located in the belt fabric layer. The belt surface temperature is transmitted to the flexible temperature sensor through the thermally conductive resin. The intelligent wireless collector collects the belt local temperature signal obtained by the belt local temperature monitoring module.

[0009] The belt protection device is installed on one side of the belt conveyor. The intelligent wireless collector transmits the local belt temperature signal to the belt protection device, and the belt protection device monitors the local belt temperature in real time according to the received temperature signal.

[0010] And the belt early warning platform can display the belt temperature in real time, judge the level and location of the belt fire, send out alarm information, and control the start and stop of the belt protection device.

[0011] Furthermore, the thermally conductive resin is an organic metal hybrid oligomeric resin formed by hybridizing different types of metal ions or metal particles with an oligomeric resin.

[0012] Furthermore, the belt includes: two belt rubber layers and a belt fabric layer located between the two belt rubber layers. After the thermal conductive resin is mixed with a part of the belt, the overall shape is funnel-shaped. The closer the thermal conductive resin is to the rubber layer, the larger the area is, and the closer it is to the fabric layer, the smaller the area is.

[0013] Furthermore, the flexible temperature sensor is fixed to the belt fabric layer by weaving and is in contact with the thermal conductive resin, and the smaller areas of the two funnel-shaped thermal conductive resins are in contact with one flexible temperature sensor.

[0014] Furthermore, the flexible temperature sensor uses a flexible polymer film such as polyimide, polyvinylidene fluoride or polyetherimide as a substrate material.

[0015] Furthermore, each intelligent wireless collector is numbered, and every two intelligent wireless collectors are arranged at the same distance along the running direction of the belt conveyor, and the real-time temperature change of the belt is obtained by electromagnetic induction with the flexible temperature sensor.

[0016] Furthermore, the belt warning platform includes a temperature display, a belt warning model and an audible and visual alarm device. The temperature display displays the belt temperature in real time; the belt warning model provides graded warnings for belt fires; and the audible and visual alarm device generates audible and visual alarm signals based on signals sent by the belt warning model.

[0017] Furthermore, the belt protection device includes a water sprinkler control device and a shutdown control device.

[0018] Furthermore, the belt fire graded warning includes three levels: a blue alarm is issued when the temperature is 30-60℃, a yellow alarm is issued when the temperature is 60-120℃, and a red alarm is issued when the temperature is ≥120℃; when the temperature exceeds 60℃, a yellow alarm is issued and the sprinkler control is started, and when the temperature exceeds 120℃, a red alarm is issued and the belt operation is stopped, and a warning to evacuate personnel is issued.

[0019] The present invention also provides a wireless monitoring method for real-time measurement of mine belt temperature, which specifically includes the following steps:

[0020] a. The intelligent wireless collector generates electromagnetic coupling with the flexible temperature sensor every 30 seconds, collects the resonant frequency and converts it into a temperature signal to be transmitted to the belt protection device;

[0021] b. The belt protection device collects the temperatures of each belt local temperature monitoring module every 30 seconds to monitor the overall belt temperature in real time;

[0022] c. When an abnormal temperature point is found, the temperature abnormal range is determined by automatically identifying the number of the intelligent wireless collector of the abnormal belt temperature point, the belt fire location is sent through the belt early warning platform, and different prevention and control measures are immediately initiated according to the three levels of belt fire graded warning.

[0023] The present invention has the following beneficial effects:

[0024] The present invention uses a wireless monitoring system for measuring the temperature of the mine belt in real time to monitor the belt surface temperature in real time. The local belt surface temperature change can be transmitted to the flexible temperature sensor of the belt fabric layer through the thermal conductive resin of the belt rubber layer, and then the temperature signal of the flexible temperature sensor is read by the intelligent wireless collector with a unique number and transmitted to the early warning platform. The belt early warning platform analyzes the belt temperature information, issues different levels of early warnings and initiates different protection measures according to the belt early warning model. The present invention can monitor the overall belt surface temperature in real time, achieve early belt fire warning, and prevent further development of the fire. At the same time, the abnormal temperature range can be quickly determined through the marked intelligent wireless collector monitoring range, and corresponding control measures can be taken in time.

[0025] Therefore, compared with the prior art, the present invention can monitor the surface temperature of the belt in real time with high monitoring accuracy and few false alarms. When an abnormal temperature point occurs, an early warning can be quickly issued and the temperature abnormality range can be determined, and corresponding measures can be taken to prevent the development of belt fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0027] Figure 1 A partial structural diagram of a wireless monitoring system for real-time measurement of mine belt temperature according to the present invention is shown.

[0028] Figure 2 The structure diagram of the belt local temperature monitoring module located inside the belt is shown.

[0029] Figure 3 Shows Figure 2 Longitudinal section view of .

[0030] The figure numbers in the above drawings are:

[0031] 1. Belt; 2. Intelligent wireless data collector; 3. Belt protection device; 4. Belt rubber layer; 5. Belt fabric layer; 6. Thermal conductive resin; 7. Flexible temperature sensor. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1

[0034] like Figure 1 A wireless monitoring system for real-time measurement of mine belt temperature is shown, comprising:

[0035] Multiple intelligent wireless collectors are located in the belt lane and above the belt, with a certain distance between two adjacent intelligent wireless collectors;

[0036] Multiple belt local temperature monitoring modules, including: thermally conductive resin located in the belt rubber layer and a flexible temperature sensor located in the belt fabric layer. The belt surface temperature is transmitted to the flexible temperature sensor through the thermally conductive resin. The intelligent wireless collector collects the belt local temperature signal obtained by the belt local temperature monitoring module.

[0037] The belt protection device is installed on one side of the belt conveyor. The intelligent wireless collector transmits the local belt temperature signal to the belt protection device, and the belt protection device monitors the local belt temperature in real time according to the received temperature signal.

[0038] And the belt early warning platform can display the belt temperature in real time, judge the level and location of the belt fire, send out alarm information, and control the start and stop of the belt protection device.

[0039] Specifically, the thermally conductive resin is an organic metal hybrid oligomeric resin formed by hybridizing different types of metal ions or metal particles with oligomeric resin. The metal ions or metal particles can increase the thermal conductivity of the resin, and the organic resin has good compatibility with rubber. During the production process of the belt, the organic metal hybrid oligomeric resin is mixed and injected into the rubber layer of the belt.

[0040] like Figure 1 As shown, the belt local temperature monitoring module is located inside the belt 1, the intelligent wireless collector 2 is set 3m above the belt conveyor in the belt lane, and one is set every 6m along the working direction of the belt conveyor, and the belt protection device 3 is set on one side of the belt conveyor. The intelligent wireless collector 2 generates electromagnetic coupling with the belt local temperature monitoring module every 30s to collect the resonant frequency in the circuit and convert it into a temperature signal. The intelligent wireless collector 2 transmits the obtained belt local temperature signal to the belt early warning platform and the belt protection device 3, and the belt early warning platform 3 monitors the belt local temperature in real time according to the received temperature signal.

[0041] Specifically, Figure 2 As shown, the belt includes: two belt rubber layers 4 and a belt fabric layer 5 located between the two belt rubber layers. After the thermal conductive resin 6 is mixed with a part of the belt, the overall shape is funnel-shaped. The closer the thermal conductive resin is to the rubber layer, the larger the area is, and the closer it is to the fabric layer, the smaller the area is. The funnel-shaped design can increase the monitoring area of ​​the belt surface temperature and improve the monitoring accuracy.

[0042] Specifically, Figure 3 As shown, the flexible temperature sensor is fixed to the belt fabric layer by weaving and is in contact with the thermal conductive resin, and the smaller areas of the two funnel-shaped thermal conductive resins are in contact with one flexible temperature sensor.

[0043] Specifically, the flexible temperature sensor uses a flexible polymer film such as polyimide, polyvinylidene fluoride or polyetherimide as the substrate material. The rise and fall of temperature will change the dielectric constant of the flexible substrate material and thus change the capacitance. Therefore, when the flexible temperature sensor 7 is electromagnetically coupled using the intelligent wireless collector 2, different resonant frequencies can be obtained through the capacitance of the flexible temperature sensor 7 at different temperatures. Figure 1As shown, the intelligent wireless collector 2 is set 3m above the belt conveyor, and one is set every 6m along the working direction of the belt conveyor, and is uniquely numbered. The monitoring range of the intelligent wireless collector 2 is 5m, and the entire belt 1 is within the monitoring range of the intelligent wireless collector 2. When the intelligent wireless collector 2 detects an abnormal temperature point, it transmits the signal to the belt early warning platform. The belt early warning platform determines the abnormal belt temperature position according to the number of the intelligent wireless collector 2. When the temperature exceeds 60°C, the belt early warning platform issues a yellow alarm and starts the sprinkler control device in the belt protection device 3 to cool down the abnormal belt temperature position, thereby realizing early warning and prevention of belt fires.

[0044] Specifically, each intelligent wireless collector is numbered, and every two intelligent wireless collectors are arranged at the same distance along the running direction of the belt conveyor, and the real-time temperature change of the belt is obtained by electromagnetic induction with the flexible temperature sensor.

[0045] Specifically, the belt warning platform includes a temperature display, a belt warning model and an audible and visual alarm device. The temperature display displays the belt temperature in real time; the belt warning model provides graded warnings for belt fires; and the audible and visual alarm device generates audible and visual alarm signals based on the signals sent by the belt warning model.

[0046] Specifically, the belt protection device includes a water sprinkler control device and a shutdown control device.

[0047] Specifically, the belt fire graded warning includes three levels: a blue alarm is issued when the temperature is 30-60℃, a yellow alarm is issued when the temperature is 60-120℃, and a red alarm is issued when the temperature is ≥120℃; when the temperature exceeds 60℃, a yellow alarm is issued and the sprinkler control is started, and when the temperature exceeds 120℃, a red alarm is issued and the belt operation is stopped, and a warning to evacuate personnel is issued.

[0048] Embodiment 2

[0049] The present invention also provides a wireless monitoring method for real-time measurement of mine belt temperature, which specifically includes the following steps:

[0050] a. The intelligent wireless collector generates electromagnetic coupling with the flexible temperature sensor every 30 seconds, collects the resonant frequency and converts it into a temperature signal to be transmitted to the belt protection device;

[0051] b. The belt protection device collects the temperatures of each belt local temperature monitoring module every 30 seconds to monitor the overall belt temperature in real time;

[0052] c. When an abnormal temperature point is found, the temperature abnormal range is determined by automatically identifying the number of the intelligent wireless collector of the abnormal belt temperature point, the belt fire location is sent through the belt early warning platform, and different prevention and control measures are immediately initiated according to the three levels of belt fire graded warning.

[0053] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A wireless monitoring system for real-time measurement of mine belt temperature, characterized in that: include: Multiple intelligent wireless collectors are located in the belt lane and above the belt, with a certain distance between two adjacent intelligent wireless collectors; Multiple belt local temperature monitoring modules, including: thermally conductive resin located in the belt rubber layer and a flexible temperature sensor located in the belt fabric layer. The belt surface temperature is transmitted to the flexible temperature sensor through the thermally conductive resin. The intelligent wireless collector collects the belt local temperature signal obtained by the belt local temperature monitoring module. The belt protection device is installed on one side of the belt conveyor. The intelligent wireless collector transmits the local belt temperature signal to the belt protection device, and the belt protection device monitors the local belt temperature in real time according to the received temperature signal. And the belt early warning platform can display the belt temperature in real time, judge the level and location of the belt fire, send out alarm information, and control the start and stop of the belt protection device.

2. A wireless monitoring system for real-time measurement of mine belt temperature according to claim 1, characterized in that: The thermally conductive resin is an organic metal hybrid oligomeric resin formed by hybridizing different types of metal ions or metal particles with an oligomeric resin.

3. A wireless monitoring system for real-time measurement of mine belt temperature according to claim 2, characterized in that the belt include: Two belt rubber layers and a belt fabric layer located between the two belt rubber layers. The overall shape of the thermal conductive resin after being mixed with a part of the belt is funnel-shaped. The closer the thermal conductive resin is to the rubber layer, the larger its area is, and the closer it is to the fabric layer, the smaller its area is.

4. A wireless monitoring system for real-time measurement of mine belt temperature according to claim 3, characterized in that: The flexible temperature sensor is fixed to the belt fabric layer by weaving and is in contact with the heat-conducting resin. The smaller areas of the two funnel-shaped heat-conducting resins are in contact with one flexible temperature sensor.

5. A wireless monitoring system for real-time measurement of mine belt temperature according to claim 4, characterized in that: The flexible temperature sensor uses a flexible polymer film such as polyimide, polyvinylidene fluoride or polyetherimide as a substrate material.

6. A wireless monitoring system for real-time measurement of mine belt temperature according to claim 5, characterized in that: Each intelligent wireless collector is numbered, and every two intelligent wireless collectors are set at the same distance along the running direction of the belt conveyor. The real-time temperature change of the belt is obtained through electromagnetic induction with the flexible temperature sensor.

7. A wireless monitoring system for real-time measurement of mine belt temperature according to claim 6, characterized in that: The belt warning platform includes a temperature display, a belt warning model and an audible and visual alarm device. The temperature display displays the belt temperature in real time; the belt warning model provides graded warnings for belt fires; and the audible and visual alarm device generates audible and visual alarm signals according to the signals sent by the belt warning model.

8. A wireless monitoring system for real-time measurement of mine belt temperature according to claim 7, characterized in that: The belt protection device includes a water sprinkling control device and a shutdown control device.

9. A wireless monitoring system for real-time measurement of mine belt temperature according to claim 8, characterized in that: The belt fire graded warning includes three levels: a blue alarm is issued when the temperature is 30-60℃, a yellow alarm is issued when the temperature is 60-120℃, and a red alarm is issued when the temperature is ≥120℃; when the temperature exceeds 60℃, a yellow alarm is issued and the sprinkler control is started, and when the temperature exceeds 120℃, a red alarm is issued and the belt operation is stopped, and a warning to evacuate personnel is issued.

10. A wireless monitoring method for real-time measurement of mine belt temperature, using the system described in any one of claims 1 to 9, specifically comprising the following steps: a. The intelligent wireless collector generates electromagnetic coupling with the flexible temperature sensor every 30 seconds, collects the resonant frequency and converts it into a temperature signal to be transmitted to the belt protection device; b. The belt protection device collects the temperatures of each belt local temperature monitoring module every 30 seconds to monitor the overall belt temperature in real time; c. When an abnormal temperature point is found, the temperature abnormal range is determined by automatically identifying the number of the intelligent wireless collector of the abnormal belt temperature point, the belt fire location is sent through the belt early warning platform, and different prevention and control measures are immediately initiated according to the three levels of belt fire graded warning.

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