Self-powered ball mill health monitoring device based on rotating heavy hammer

Abstract

The invention discloses a self-powered ball mill health monitoring device based on a rotary heavy hammer, which comprises an energy acquisition device, a voltage stabilization charging module, an energy storage module, a signal acquisition module, an stm32 main control module, a wireless sending module, a wireless receiving module and a computer, a power generator assembled in the energy collection device can continuously provide electric energy for the energy storage module, the energy storage module is connected with the signal collection module, the stm32 main control module and the wireless sending module, and the self-powered energy collection device has the beneficial effects that self power supply can be achieved without depending on external devices; electric energy can be generated as long as the cylinder wall of the ball mill rotates without depending on other external environments; the stm32 main control module adopted by the invention has abundant expansibility and sufficient space to customize monitoring parameters and facilitate future equipment upgrading.

Description

Technical Field

[0001] The invention relates to a ball mill health monitoring device, in particular to a self-powered ball mill health monitoring device based on a rotating weight. Background Art

[0002] During the operation of the ball mill, parameters such as the rotation speed of the ball mill affect the grinding efficiency of the ball mill. By monitoring the load of the ball mill, we can understand the operation of the ball mill so as to adjust the relevant operating parameters, improve the grinding efficiency of the ball mill, and prevent bulging and empty smashing. At the same time, we can diagnose the health status of the ball mill, detect the wear of components such as the ball mill liner and the cracks in the ball mill cylinder. Once the corresponding indicators are abnormal, the ball mill system must be inspected and maintained accordingly.

[0003] At present, among the ball mill health monitoring methods, the use of drum wall vibration to detect the state of the ball mill is the most commonly used single-source detection method today. Compared with other single-source monitoring signals, vibration signals have the characteristics of low interference, easy detection and strong generalization ability of related models. At present, the accuracy of the prediction results of the ball mill state has been improved to 95%-98%, which has broad application prospects. However, for the detection device fixed on the rotating drum wall of the ball mill, continuous power supply is a difficult problem to solve. At present, there are methods such as battery power supply, brush power supply, and electromagnetic induction power supply. Battery power supply must be shut down and replaced when the battery is exhausted, which cannot meet the needs of long-term continuous production. Brush power supply has higher installation requirements and a power supply mechanism must be configured on the ground. Electromagnetic induction also requires a corresponding power supply mechanism to be configured on the ground. Although the latter two power supply methods can realize the long-term operation of the detection device, they still require the cooperation of corresponding power supply devices, have high requirements for site and installation, and have a complex structure. It is impossible to achieve complete self-power supply, which is very inconvenient.

[0004] Therefore, how to achieve continuous power supply, get rid of dependence on external power sources, and thus achieve self-power supply has become an issue worthy of study. Summary of the invention

[0005] The present invention provides a self-powered ball mill health monitoring device based on a rotating weight, which converts kinetic energy into electrical energy through the rotation of the ball mill barrel wall, thereby meeting the demand for stable and continuous power supply of the health monitoring device.

[0006] The self-powered ball mill health monitoring device based on a rotating weight provided by the present invention comprises an energy collection device, a voltage-stabilizing charging module, an energy storage module, a signal collection module, an STM32 main control module, a wireless transmission module, a wireless receiving module and a computer, wherein the energy collection device is connected to the energy storage module through the voltage-stabilizing charging module, the generator assembled in the energy collection device can continuously provide electric energy to the energy storage module, the energy storage module is respectively connected to the signal collection module, the STM32 main control module and the wireless transmission module, the energy storage module provides power for the signal collection module, the STM32 main control module and the wireless transmission module, the signal collection module, the STM32 main control module and the wireless transmission module are connected in sequence, the signal collection module can transmit the collected data to the wireless transmission module in real time through the STM32 main control module, the wireless transmission module and the wireless receiving module are connected through wireless communication, the wireless transmission module can transmit the received data to the wireless receiving module in real time, the wireless receiving module and the computer are connected in sequence, and the wireless receiving module can transmit the received data to the computer in real time for calculation and processing.

[0007] The energy collection device is fixed on the barrel wall of the ball mill through a bracket. The energy collection device includes a weight, a speed-increasing gearbox and a generator. The speed-increasing gearbox and the generator are coaxially connected and then pivoted on the bracket. The weight is pivoted on the output shaft of the speed-increasing gearbox. The weight can rotate synchronously with the rotation of the barrel wall of the ball mill and drive the input shaft of the speed-increasing gearbox to rotate. The output shaft of the speed-increasing gearbox drives the generator to generate electricity. The generator is connected to the energy storage module through a voltage-stabilizing charging module. The generator can continuously provide electrical energy to the energy storage module.

[0008] The voltage-stabilizing charging module consists of a voltage-stabilizing circuit and a voltage and current detection circuit. The energy collection device, the voltage-stabilizing circuit, the voltage and current detection circuit and the energy storage module are connected in sequence. The voltage and current monitoring circuit is also connected to the stm32 main control module.

[0009] The energy storage module consists of a lithium battery, a power detection circuit and a charge and discharge circuit. The lithium battery, the power detection circuit and the charge and discharge circuit are connected in sequence. The charge and discharge circuit is connected to the voltage stabilizing charging module, the stm32 main control module, the signal acquisition module and the wireless transmission module respectively.

[0010] The signal acquisition module is equipped with a vibration sensor and a noise sensor, which can collect vibration and noise during the rotation of the ball mill.

[0011] The wireless receiving module and the computer are respectively connected to a ground power supply, and the ground power supply provides power to the wireless receiving module and the computer.

[0012] The above-mentioned energy storage module, signal acquisition module, stm32 main control module, wireless transmission module, ground power supply, wireless receiving module, computer, voltage stabilizing charging module, speed increasing gearbox and generator are selected and assembled according to the model of the ball mill and the specific grinding requirements. Therefore, the specific models and specifications are not described in detail.

[0013] The working principle of the present invention is as follows:

[0014] The energy collection device in the self-powered ball mill health monitoring device based on rotating weight provided by the present invention is fixed on the barrel wall of the ball mill through a bracket. Due to the effect of gravity, the weight on the energy collection device can rotate synchronously with the barrel wall of the ball mill, and drive the input shaft of the speed-increasing gearbox to rotate. The output shaft of the speed-increasing gearbox drives the generator to generate electricity. The generator can continuously charge the energy storage module through the voltage-stabilizing charging module; the energy storage module can ensure that when the ball mill stops running or the running speed cannot meet the power supply demand, it can still provide sufficient electric energy for the equipment, so that the health monitoring device can operate stably. In addition, the voltage and current detection circuit in the voltage-stabilizing charging module and the power detection circuit in the energy storage module can allow the voltage, current and power signals to be regularly obtained through the stm32 main control module to check the current power status of the system;

[0015] The signal acquisition module is directly powered by the energy storage module. The signal acquisition module is equipped with a vibration sensor and a noise sensor, which can collect the vibration state of the ball mill barrel wall and the noise signal generated by the ball mill in real time. The signal acquisition module can obtain the data signal required to detect the operating state of the ball mill; the stm32 main control module is directly powered by the energy storage module. The stm32 main control module can amplify, filter and perform ADC operations on the signals collected by the vibration sensor and the noise sensor, and finally forward the preliminarily processed signals to the wireless transmission module;

[0016] The wireless transmission module is directly powered by the energy storage module. The wireless transmission module receives the digital signal from the stm32 main control module and sends the signal to the wireless receiving module on the ground by the Bluetooth protocol.

[0017] The wireless receiving module is directly powered by the ground power supply, and the wireless receiving module receives the signal sent by the wireless transmitting module, thereby achieving the purpose of wireless signal transmission;

[0018] The computer receives the signal transmitted by the wireless receiving module, processes the signal through computer software, diagnoses the load and health status of the ball mill, and thus achieves the purpose of monitoring the operating status of the ball mill.

[0019] Beneficial effects of the present invention:

[0020] The self-powered ball mill health monitoring device based on a rotating weight provided by the present invention can convert the rotation of the ball mill barrel wall into the rotation of the weight. The rotation of the weight is increased in speed by a speed-increasing gearbox to drive a generator to generate electricity, thereby continuously supplying power to the health monitoring device. The present invention can achieve self-power supply without relying on external devices. As long as the barrel wall of the ball mill rotates, the present invention can generate electrical energy without relying on other external environments. The stm32 main control module used in the present invention has rich expansibility and sufficient space to customize monitoring parameters and facilitate future equipment upgrades. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall structural block diagram of the ball mill health monitoring device described in the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of the energy harvesting device described in the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of the voltage-stabilizing charging module described in the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of the energy storage module described in the present invention.

[0025] Figure 5 It is a schematic flow chart of the self-powered ball mill health monitoring method based on rotating weight according to the present invention.

[0026] The annotations in the above figure are as follows:

[0027] 1. Energy collection device 2. Energy storage module 3. Signal acquisition module

[0028] 4. stm32 main control module 5. wireless transmission module 6. wireless receiving module 7. computer

[0029] 8. Voltage stabilizing charging module 9. Bracket 10. Ball mill barrel wall 11. Heavy hammer

[0030] 12. Speed ​​increasing gearbox 13. Generator 14. Ground power supply. DETAILED DESCRIPTION

[0031] like Figure 1As shown, the self-powered ball mill health monitoring device based on rotating weight provided by the present invention includes an energy collection device 1, an energy storage module 2, a signal collection module 3, an STM32 main control module 4, a wireless transmission module 5, a wireless receiving module 6 and a computer 7, wherein the energy collection device 1 is connected to the energy storage module 2 through a voltage stabilizing charging module 8, and the generator 13 assembled in the energy collection device 1 can continuously provide power to the energy storage module 2, the energy storage module 2 is respectively connected to the signal collection module 3, the STM32 main control module 4 and the wireless transmission module 5, and the energy storage module 2 is the signal collection module 3, the STM32 main control module 4 and the wireless transmission module 5. The line sending module 5 provides power, the signal acquisition module 3, the stm32 main control module 4 and the wireless sending module 5 are connected in sequence, the stm32 main control module 4 can transmit the data collected by the signal acquisition module 3 to the wireless sending module 5 in real time after processing, the wireless sending module 5 and the wireless receiving module 6 are connected through wireless communication, the wireless sending module 5 can transmit the received data to the wireless receiving module 6 in real time, the wireless receiving module 6 is connected to the computer 7, the wireless receiving module 6 can transmit the received data to the computer 7 in real time, and finally the monitoring software is used in the computer 7 to calculate and process the data.

[0032] like Figure 2 As shown, the energy harvesting device 1 is fixed on the barrel wall 10 of the ball mill through a bracket 9. The energy harvesting device 1 includes a weight 11, a speed increasing gear box 12 and a generator 13, wherein the speed increasing gear box 12 and the generator 13 are coaxially connected and then pivoted on the bracket 9, and the weight 11 is pivoted on the input shaft of the speed increasing gear box 12. The weight 11 can rotate synchronously with the rotation of the barrel wall 10 of the ball mill, and drive the input shaft of the speed increasing gear box 12 to rotate. The output shaft of the speed increasing gear box 12 drives the generator 13 to generate electricity. The generator 13 is connected to the energy storage module 2 through the voltage stabilizing charging module 8. The generator 13 can continuously provide electrical energy to the energy storage module 2. In addition, more sufficient electrical energy can be provided by installing multiple energy harvesting devices 1.

[0033] like Figure 3 As shown, the voltage-stabilizing charging module 8 is composed of a voltage-stabilizing circuit and a voltage and current detection circuit. The energy collection device 1, the voltage-stabilizing circuit, the voltage and current detection circuit and the energy storage module 2 are connected in sequence. The voltage and current detection circuit is connected to the stm32 main control module 4. The voltage-stabilizing circuit can keep the voltage stable and constant. The voltage and current detection circuit can detect the power status in the current system and transmit the voltage and current signals to the stm32 main control module 4.

[0034] like Figure 4As shown, the energy storage module 2 is composed of a lithium battery, a power detection circuit and a charge and discharge circuit. The lithium battery, the power detection circuit and the charge and discharge circuit are connected in sequence. The charge and discharge circuit is connected to the voltage stabilizing charging module 8, the stm32 main control module 4, the signal acquisition module 3 and the wireless transmission module 5 respectively. The lithium battery stores electrical energy, the power detection circuit detects the current power of the lithium battery, and transmits the power information to the stm32 main control module 4. The charge and discharge circuit can charge the lithium battery and supply power to the stm32 main control module 4, the signal acquisition module 3 and the wireless transmission module 5.

[0035] The signal acquisition module 3 is equipped with a vibration sensor and a noise sensor, which can collect vibration and noise during the rotation of the ball mill.

[0036] The wireless receiving module 6 and the computer 7 are respectively connected to a ground power supply 14 , and the ground power supply 14 provides power to the wireless receiving module 6 and the computer 7 .

[0037] The weight 11 needs to be designed according to the power consumption of the specific monitoring system. The main design parameter is the torque that the weight 11 can generate under the action of gravity and centrifugal force. At the same time, according to the centrifugal force F = mω 2 r, when the energy harvesting device 1 is installed on the barrel wall 10 of the ball mill, the centrifugal force is the largest. When the ball mill speed is too high and the centrifugal force is too large, the weight 11 will swing with the barrel wall 10 of the ball mill as the reference system instead of rotating a full circle. Therefore, the centrifugal force F can be reduced by reducing r, that is, the energy harvesting module 1 is arranged at the end of the barrel wall 10 of the ball mill close to the center of rotation, thereby reducing the influence of the centrifugal force F on the rotation of the weight 11.

[0038] The selection of the speed increasing gearbox 12 and the generator 13 should be combined, and the selection of the gear ratio needs to balance two aspects: one is to be able to convert the slower movement of the weight 11 into the higher speed required by the generator 13; the other is to avoid excessively high gear ratios that make it difficult for the weight 11 to rotate, causing the device to shut down. The generator 13 is selected to be able to achieve the expected power at the rated speed. The main basis for the combination of the two is to be able to generate enough electrical energy.

[0039] The stm32 main control module 4 can use external circuits to amplify and filter the collected signals, and use the stm32 chip to perform analog-to-digital conversion on the amplified and filtered signals. Finally, the stm32 chip transmits the digital signal to the wireless sending module 5. In addition, the stm32 chip has rich interfaces and can be equipped with other sensors as needed, such as liner wear detection bolts, etc., to achieve more diversified ball mill status monitoring.

[0040] The above-mentioned energy storage module 2, signal acquisition module 3, stm32 main control module 4, wireless transmission module 5, ground power supply 14, wireless receiving module 6, computer 7, voltage stabilizing charging module 8, speed increasing gearbox 12 and generator 13 are selected and assembled according to the model of the ball mill and the specific grinding requirements. Therefore, the specific models and specifications are not repeated.

[0041] like Figure 5 As shown, Figure 5 The present application provides a flow chart of a self-powered ball mill health monitoring method based on a rotating weight, the method comprising the following steps:

[0042] When the ball mill barrel wall 10 rotates, S1 converts the rotational energy into electric energy that meets the requirements of the power consumption module through the energy collection device 1, the voltage stabilizing charging module 8 and the energy storage module 2 in sequence, so as to supply power to each power consumption module on the ball mill barrel wall 10.

[0043] S2 uses various sensors to detect the signals generated by the ball mill during operation, and transmits the analog signals to the wireless sending module 5 after amplification and filtering and ADC conversion through the stm32 main control module 4, and then sends them to the wireless receiving module 6 on the ground.

[0044] S3 After the wireless receiving module 6 on the ground receives the signal from the wireless transmitting module 5, the signal is transmitted to the computer 7, and finally the computer 7 analyzes and processes the wirelessly received signal.

[0045] The working principle of the present invention is as follows:

[0046] The energy collection device 1 in the self-powered ball mill health monitoring device based on rotating weight provided by the present invention is fixed on the barrel wall 10 of the ball mill through the bracket 9. Due to the effect of gravity, the weight 11 on the energy collection device 1 can rotate synchronously with the barrel wall 10 of the ball mill. The rotation of the weight 11 drives the generator 13 to generate electricity through the speed-increasing gear box 12. The generator 13 can continuously charge the energy storage module 2 through the voltage-stabilizing charging module 8; the energy storage module 2 can ensure that when the ball mill stops running or the running speed cannot meet the power supply demand, it can still provide sufficient power for the equipment, so that the health monitoring device can operate stably. In addition, the voltage and current detection circuit in the voltage-stabilizing charging module 8 and the power detection circuit in the energy storage module 2 can allow the voltage, current and power signals to be obtained periodically through the stm32 main control module 4 to check the current power status of the system;

[0047] The signal acquisition module 3 is directly powered by the energy storage module 2. The signal acquisition module 3 is equipped with a vibration sensor and a noise sensor, which can collect the vibration state and noise of the ball mill barrel wall 10 in real time. The signal acquisition module 3 can obtain the data signal required to detect the operating state of the ball mill; the stm32 main control module 4 is directly powered by the energy storage module 2. The stm32 main control module 4 can amplify, filter and perform analog-to-digital conversion on the signals collected by the vibration sensor and the noise sensor, and finally forward the preliminarily processed signals to the wireless transmission module 5;

[0048] The wireless transmission module 5 is directly powered by the energy storage module 2. The wireless transmission module 5 receives the signal from the stm32 main control module 4 and sends the signal to the wireless receiving module 6 on the ground by Bluetooth communication;

[0049] The wireless receiving module 6 is directly powered by the ground power supply 14, and the wireless receiving module 6 receives the signal sent by the wireless sending module 5, thereby achieving the purpose of wireless signal transmission;

[0050] The computer 7 receives the signal processed by the wireless receiving module 6, and diagnoses the load and health status of the ball mill through the software algorithm inside the computer 7, so as to achieve the purpose of monitoring the operating status of the ball mill.

Claims

1. A self-powered ball mill health monitoring device based on a rotating weight, characterized in that: It includes an energy collection device, a voltage-stabilizing charging module, an energy storage module, a signal collection module, an STM32 main control module, a wireless transmission module, a wireless receiving module and a computer, wherein the energy collection device is connected to the energy storage module through the voltage-stabilizing charging module, the generator assembled in the energy collection device can continuously provide electric energy to the energy storage module, the energy storage module is respectively connected to the signal collection module, the STM32 main control module and the wireless transmission module, the energy storage module provides power for the signal collection module, the STM32 main control module and the wireless transmission module, the signal collection module, the STM32 main control module and the wireless transmission module are connected in sequence, the signal collection module can transmit the collected data to the wireless transmission module in real time through the STM32 main control module, the wireless transmission module and the wireless receiving module are connected through wireless communication, the wireless transmission module can transmit the received data to the wireless receiving module in real time, the wireless receiving module is connected to the computer, and the wireless receiving module can transmit the received data to the computer in real time for calculation and processing.

2. The self-powered ball mill health monitoring device based on a rotating weight according to claim 1 is characterized in that: The energy collection device is fixed on the barrel wall of the ball mill through a bracket. The energy collection device includes a weight, a speed-increasing gearbox and a generator. The speed-increasing gearbox and the generator are coaxially connected and then pivoted on the bracket. The weight is pivoted on the input shaft of the speed-increasing gearbox. The weight can rotate synchronously with the rotation of the barrel wall of the ball mill and drive the input shaft of the speed-increasing gearbox to rotate. The output shaft of the speed-increasing gearbox drives the generator to generate electricity. The generator is connected to the energy storage module through a voltage-stabilizing charging module, and the generator can continuously provide electrical energy to the energy storage module.

3. The self-powered ball mill health monitoring device based on a rotating weight according to claim 1, characterized in that: The voltage-stabilizing charging module is composed of a voltage-stabilizing circuit and a voltage and current detection circuit. The energy collection device, the voltage-stabilizing circuit, the voltage and current detection circuit and the energy storage module are connected in sequence, and the voltage and current monitoring circuit is also connected to the stm32 main control module.

4. The self-powered ball mill health monitoring device based on a rotating weight according to claim 1 is characterized in that: The energy storage module is composed of a lithium battery, a power detection circuit and a charge and discharge circuit, which are connected in sequence, and the charge and discharge circuit is connected to a voltage stabilizing charging module, an STM32 main control module, a signal acquisition module and a wireless transmission module respectively.

5. The self-powered ball mill health monitoring device based on a rotating weight according to claim 1 is characterized in that: The signal acquisition module is equipped with a vibration sensor and a noise sensor, which can collect vibration and noise during the rotation of the ball mill.

6. The self-powered ball mill health monitoring device based on a rotating weight according to claim 1, characterized in that: The wireless receiving module and the computer are respectively connected to a ground power supply, and the ground power supply provides power for the wireless receiving module and the computer.

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