CN214933539U - Coal piling protection device based on sound and vibration combined monitoring - Google Patents
Coal piling protection device based on sound and vibration combined monitoring Download PDFInfo
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- CN214933539U CN214933539U CN202120976221.8U CN202120976221U CN214933539U CN 214933539 U CN214933539 U CN 214933539U CN 202120976221 U CN202120976221 U CN 202120976221U CN 214933539 U CN214933539 U CN 214933539U
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Abstract
The invention provides a coal piling protection device based on sound and vibration combined monitoring, which can monitor the collision sound and vibration of coal falling generated by a head part of a belt conveyor in the coal piling process in real time by collecting a sound sensor and a vibration sensor which are arranged on the head part of the belt conveyor, and rapidly control a programmable logic controller to cut off a power supply of a belt conveyor while monitoring the coal falling sound, thereby realizing coal piling protection. The invention can not be interfered by mine dust, moist and other severe environments, the combined monitoring mode of sound and vibration is stable and reliable, and the system can quickly realize coal piling monitoring in the early stage of coal piling accidents, thereby having the function of preventing accidents in advance. The device can be widely applied to the protection of coal piling accidents of the belt machine head under the coal mine.
Description
Technical Field
The invention relates to the field of signal processing, integrates the communication principle, signal acquisition, signal detection, analog circuit and other theories, and particularly relates to a sound and vibration combined monitoring device.
Background
The belt head is the part where a plurality of belt conveyors are mutually lapped on a coal mine transportation line, has the function of conveying the mined coal from one belt conveyor to another belt conveyor, and is also the part where coal piling accidents occur most easily. The coal piling is a phenomenon that coal conveyed by one belt conveyor is piled up at the head of the other belt conveyor due to abnormal operation of the lap joint part of the two belt conveyors, once a coal piling accident occurs, the coal mine is piled up at a high speed, if the belt conveyors cannot be stopped in time, the coal mine can submerge the machine head of the belt conveyor in a short period, if transmission mechanisms such as a motor reduction box are covered by the coal to be locked, the belt conveyors are overloaded, if the belt conveyors cannot be stopped in time, the transmission mechanisms such as the motor reduction box can be directly burnt, even the belt is torn, serious equipment damage accidents are caused, and the safety of underground personnel can be endangered.
At present, when coal piling accidents happen under a mine, coal piled in early stage can overflow from windows on two sides of a coal falling bucket due to the fact that coal mines are quickly piled on the head of a belt conveyor, obvious coal falling sound can be generated when the coal falls from a certain height in the process of overflowing the coal, operation and maintenance workers on site often judge whether the head of the belt conveyor piles according to whether abnormal coal falling sound is heard or not, inspection is conducted regularly, and once the coal piling signs are found, a belt conveyor system needs to be quickly closed to protect equipment.
The acoustic sensor is a sensor for converting vibration signals in air into electric signals, the vibration sensor is a sensor for converting vibration signals on the surface of a rigid object into electric signals, and the acoustic sensor and the vibration sensor both belong to passive working modes.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a coal piling protection device based on sound and vibration combined monitoring. According to the invention, by collecting the sound sensor and the vibration sensor which are arranged at the head of the belt conveyor on the coal mine transportation line, the collision sound and vibration of the coal falling generated in the coal piling process of the head of the belt conveyor can be monitored in real time, and the programmable logic controller is rapidly controlled to cut off the power supply of the belt conveyor while the coal falling sound is monitored, so that the coal piling protection is realized. The device can monitor the coal piling accident of the head of the belt conveyor from the dimension of sound, and quickly responds to and protects other mechanical and electronic equipment of the head of the belt conveyor when the coal piling accident occurs.
According to the invention, after the acoustic sensor and the vibration sensor are respectively arranged near the head of the belt conveyor under the mine, the coal falling sound of the head of the belt conveyor under the mine can be monitored in real time, and the belt conveyor is closed through the underground programmable logic controller in time after the coal falling sound is monitored, so that the damage to equipment caused by the accumulation of coal blocks at the head of the belt conveyor is prevented.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a coal piling protection device based on sound and vibration combined monitoring comprises a sound sensor (1), a vibration sensor (2), an acquisition processing board (3) and a mine special explosion-proof box (4), wherein the sound sensor (1) and the vibration sensor (2) are respectively connected with the acquisition processing board (3), the acquisition processing board (3) is arranged in the mine special explosion-proof box (4), the sound sensor (1) is directly connected with a box body of the mine special explosion-proof box (4) through a 4-core aerial plug, the vibration sensor (2) is directly connected with the box body of the mine special explosion-proof box (4) through the 4-core aerial plug, the acquisition processing board (3) is fixed in the mine special explosion-proof box (4) through a screw with the diameter of 3mm, 3 watertight wiring ports are reserved on one side of the box body of the mine special explosion-proof box (4) and respectively correspond to a power supply interface (5), a network communication interface (6) and a signal input and output interface (7) of equipment, the external equipment is respectively connected with the internal acquisition and processing plate (3) through 3 watertight interfaces.
The acoustic sensor (1) is oval, and the shell is made of flame-retardant plastic.
The vibration sensor (2) is cylindrical, and the shell is made of 304 stainless steel.
The sound sensor (1) collects environmental sound, the vibration sensor (2) collects ground vibration signals, the collecting and processing plate (3) collects signals, and the signals are analyzed and controlled to give an alarm.
The mine special explosion-proof box (4) is used for installing and protecting the acquisition and processing board (3).
The power supply interface (5) provides direct current power supply.
The network communication interface (6) is an RJ45 Ethernet interface and is accessed to a network switch to communicate with external equipment.
The signal input and output interface (7) is used for controlling the programmable logic controller.
The invention has the beneficial effects that the device mainly comprises the sound sensor, the vibration sensor and the acquisition and calculation board card, can acquire the sound and vibration signals of the head of the belt conveyor in real time and detect the sound and vibration at the edge end, and when the equipment detects that the coal falling sound exists near the head of the belt conveyor, the equipment can immediately cut off the power supply of the belt conveyor through the mine programmable logic controller system to prevent the further deterioration of the coal piling accident. The device can not receive the interference of mine dust, adverse circumstances such as humidity, and the joint monitoring mode of sound and vibration is reliable and stable, and the system just can realize the monitoring of coal piling rapidly in the early stage that the coal piling accident takes place, has the effect of prevention accident in advance. The device can be widely applied to the protection of coal piling accidents of the belt machine head under the coal mine. The device has great significance for promoting the automatic upgrading and safe production of industrial production.
Drawings
FIG. 1 is a design diagram of a coal piling protection device for sound and vibration combined monitoring.
FIG. 2 is a topological diagram of the coal pile protection system of the present invention.
The system comprises a sound sensor 1, a vibration sensor 2, an acquisition and processing board 3, a mine special explosion-proof box 4, a power supply interface 5, a network communication interface 6 and a signal input and output interface 7.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The invention provides a coal piling protection device based on sound and vibration combined monitoring, which can be widely applied to the lap joint of a belt conveyor under a coal mine to realize the coal piling protection of the head of the belt conveyor.
A coal piling protection device based on sound and vibration combined monitoring is shown in figure 1 and comprises a sound sensor (1), a vibration sensor (2), an acquisition processing board (3) and a mine special explosion-proof box (4), wherein the sound sensor (1) and the vibration sensor (2) are respectively connected with the acquisition processing board (3), the acquisition processing board (3) is arranged in the mine special explosion-proof box (4), the sound sensor (1) is directly connected with a box body of the mine special explosion-proof box (4) through a 4-core aerial plug, the vibration sensor (2) is directly connected with the box body of the mine special explosion-proof box (4) through the 4-core aerial plug, the acquisition processing board (3) is fixed in the mine special explosion-proof box (4) through a screw with the diameter of 3mm, 3 watertight wiring ports are reserved on one side of the box body of the mine special explosion-proof box (4) and respectively correspond to a power supply interface (5), a network communication interface (6) and a signal input and output interface (7) of equipment, the external equipment is respectively connected with the internal acquisition processing board (3) through 3 watertight interfaces, when vibration and sound events of coal block falling are monitored, an alarm signal is sent through the network communication interface (6), and meanwhile, the programmable logic controller is controlled to cut off a power switch of the belt conveyor transportation system through the signal input and output interface (7), so that the belt conveyor transportation system is protected.
The sound sensor (1) is oval, and the shell is made of flame-retardant plastic.
The vibration sensor (2) is cylindrical, and the shell is made of 304 stainless steel.
The sound sensor (1) collects environmental sound, the vibration sensor (2) collects ground vibration signals, the collecting and processing plate (3) collects signals, and the signals are analyzed and controlled to give an alarm.
The mine special explosion-proof box (4) is used for installing and protecting the acquisition and processing board (3).
The power supply interface (5) provides direct current power supply.
The network communication interface (6) is an RJ45 Ethernet interface and is accessed to a network switch to communicate with external equipment.
The signal input and output interface (7) is used for controlling the programmable logic controller.
FIG. 2 is a topological diagram of the coal piling protection device, the sound sensor and the vibration sensor are connected with the collection processing unit of the collection processing board, the direct current power supply is connected with the collection processing board inside the explosion-proof box (4) through a power supply interface, the network switch is connected with the collection processing board inside the explosion-proof box through a device communication interface, the programmable logic controller is connected with the collection processing board inside the explosion-proof box through a signal input and output interface, meanwhile, the programmable logic controller is connected with the switch of the belt conveyor transportation system, and the collection control board realizes indirect control over the switch of the belt conveyor transportation system through the programmable logic controller.
The specific implementation steps of the coal piling protection device based on the sound and vibration combined monitoring are as follows:
first, equipment installation and deployment
An acoustic sensor of the coal piling protection device is arranged in an area within 2m from a belt conveyor head, and a vibration sensor is arranged in a ground area within 1m of the radius beside the belt conveyor head.
Second, equipment power supply and communication
The coal piling protection device is powered, the system power supply is 12V direct current, and a network cable is connected to a system switch to realize the communication between the device and the outside.
Third, vibration detection
The device can directly start to work after power supply, firstly vibration detection can be carried out by taking 0.1 second as a period, the vibration caused by falling of the coal blocks is detected, the sampling frequency of the device is 20KHz, and the sampling digit is 24 digits.
Fourth, sound detection
The device also carries out sound detection when carrying out vibration detection, and the detection cycle is 1 second, and the detection environment has the sound that the coal cinder fell, and the sampling frequency of equipment is 20KHz, and the sampling number of bits is 24.
Fifthly, early warning and control protection of system
When the device continuously monitors vibration and sound events of coal block falling, the device can give an early warning within 1 second, sends an alarm signal through the network port, and simultaneously outputs an analog alarm signal to control the programmable logic controller to rapidly cut off a power switch of the belt conveyor transportation system, thereby realizing the protection of the belt conveyor transportation system.
Claims (8)
1. The utility model provides a coal piling protection device based on sound joint monitoring that shakes, includes acoustic sensor (1), vibration sensor (2), gathers processing board (3), mine special explosion-proof case (4), its characterized in that:
in the coal piling protection device based on the sound and vibration combined monitoring, the sound sensor (1) and the vibration sensor (2) are respectively connected with the acquisition and processing plate (3), the acquisition and processing plate (3) is arranged in the mine special explosion-proof box (4), wherein acoustic sensor (1) is inserted directly through 4 cores by plane and is connected with the box of the special explosion-proof case of mine (4), vibration sensor (2) are inserted directly through 4 cores by plane and are connected with the box of the special explosion-proof case of mine (4), gather and handle board (3) and pass through the screw fixation of 3mm diameter in the special explosion-proof case of mine (4) inside, 3 watertight wiring mouths are reserved to box one side of the special explosion-proof case of mine (4), correspond power supply interface (5) of equipment respectively, network communication interface (6) and signal input output interface (7), external equipment is connected with inside collection processing board (3) respectively through 3 watertight interfaces.
2. The coal piling protection device based on the sound and vibration combined monitoring is characterized in that:
the acoustic sensor (1) is oval, and the shell is made of flame-retardant plastic.
3. The coal piling protection device based on the sound and vibration combined monitoring is characterized in that:
the vibration sensor (2) is cylindrical, and the shell is made of 304 stainless steel.
4. The coal piling protection device based on the sound and vibration combined monitoring is characterized in that:
the sound sensor (1) collects environmental sound, the vibration sensor (2) collects ground vibration signals, the collecting and processing plate (3) collects signals, and the signals are analyzed and controlled to give an alarm.
5. The coal piling protection device based on the sound and vibration combined monitoring is characterized in that:
the mine special explosion-proof box (4) is used for installing and protecting the acquisition and processing board (3).
6. The coal piling protection device based on the sound and vibration combined monitoring is characterized in that:
the power supply interface (5) provides direct current power supply.
7. The coal piling protection device based on the sound and vibration combined monitoring is characterized in that:
the network communication interface (6) is an RJ45 Ethernet interface and is accessed to a network switch to communicate with external equipment.
8. The coal piling protection device based on the sound and vibration combined monitoring is characterized in that:
the signal input and output interface (7) is used for controlling the programmable logic controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120976221.8U CN214933539U (en) | 2021-05-08 | 2021-05-08 | Coal piling protection device based on sound and vibration combined monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120976221.8U CN214933539U (en) | 2021-05-08 | 2021-05-08 | Coal piling protection device based on sound and vibration combined monitoring |
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| Publication Number | Publication Date |
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| CN214933539U true CN214933539U (en) | 2021-11-30 |
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| CN202120976221.8U Expired - Fee Related CN214933539U (en) | 2021-05-08 | 2021-05-08 | Coal piling protection device based on sound and vibration combined monitoring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116679657A (en) * | 2023-08-01 | 2023-09-01 | 四川磊蒙机械设备有限公司 | Gravel aggregate intelligent monitoring control system |
-
2021
- 2021-05-08 CN CN202120976221.8U patent/CN214933539U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116679657A (en) * | 2023-08-01 | 2023-09-01 | 四川磊蒙机械设备有限公司 | Gravel aggregate intelligent monitoring control system |
| CN116679657B (en) * | 2023-08-01 | 2023-12-01 | 四川磊蒙机械设备有限公司 | Gravel aggregate intelligent monitoring control system |
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