Start-stop time monitoring device of vibration equipment and working method

Abstract

The invention provides a starting and stopping time monitoring device of vibration equipment and a working method. The starting and stopping time monitoring device comprises a protective shell, a shell body of the protective shell is provided with an antenna interface, an upper cover is provided with a power switch interface and a core circuit board, and a lower cover is provided with a battery and a vibration energy collector; at the moment when the vibration device is started or stopped, the MCU in the core circuit board is triggered and awakened from a low-power-consumption mode, and the date and time when vibration is started or stopped, the vibration frequency, the vibration amplitude and the like are sent to the cloud platform end through the wireless communication module. Operation and maintenance personnel can obtain the operation state information of the vibration equipment in real time through a remote monitoring means, meanwhile, the vibration energy collector can convert vibration mechanical energy generated in the operation process of the vibration equipment into electric energy, then the lithium battery is charged, the service life of the lithium battery is prolonged, a self-checking mechanism is further integrated, and the safety of the lithium battery is improved. The states of the to-be-monitored equipment and the monitoring device are monitored at the same time.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration equipment and relates to a start-stop time monitoring device and a working method for vibration equipment. Background Art

[0002] The startup and shutdown of equipment are often accompanied by significant mechanical stress, electrical shock, and temperature fluctuations. These transient changes are a high-risk period for equipment failure. Therefore, we need to pay special attention to the changes in equipment status during startup and shutdown to promptly detect and diagnose potential failures and take appropriate preventive measures to prevent the failure from escalating or causing more serious consequences.

[0003] For vibration equipment, a highly effective method currently used in the industry is to use an MCU to continuously monitor its output voltage or acceleration signal. When the equipment is at the moment of starting or stopping, its output voltage or acceleration signal often shows obvious fluctuations or mutations, which can be used to determine the start and stop time of the equipment. However, continuous monitoring solutions bring additional cost and power consumption issues. The device power supply unit faces the difficulties of regular battery replacement and complex and costly manual operation and maintenance. In addition, the functional application of traditional monitoring devices is limited to observing and recording the status of the monitored equipment, but it does not fully consider the potential functional defects or potential faults of the monitoring device itself.

[0004] The above problems exist in the existing technology. For example, patent CN201922166172.7 invented an Internet of Things monitoring terminal with power-on and power-off reminder function. The invention realizes real-time device power-on and power-off information by detecting whether the output voltage of the main power module is zero. However, in actual applications, there are some devices whose power supply voltage cannot be directly used to drive the various components in the monitoring system. Patent CN202310186074.8 invented a device start-up and shutdown monitoring method and system. The invention collects the vibration intensity of the device in real time and compares it with the vibration intensity of the device during historical shutdown. According to the comparison results, the start-up and shutdown status of the device at the current moment is determined. Both of the above patents use real-time continuous monitoring technology, but this causes the problem of high power consumption. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention provides a start-stop time monitoring device and a working method for vibration equipment, which has first-class ultra-low power consumption capability and realizes wireless long-term online monitoring of vibration equipment.

[0006] The present invention is achieved through the following technical solutions: A start-stop time monitoring device for a vibration device, comprising a control circuit board, a battery, and a vibration energy harvester; The control circuit board includes a voltage doubler rectifier circuit, a charging circuit, a signal conditioning circuit, an edge detection circuit, an acquisition module, an MCU, an acceleration sensor and a wireless communication module; The output end of the vibration energy harvester is connected to the input end of the voltage doubler rectifier circuit, and the output end of the voltage doubler rectifier circuit is connected to the battery through the charging circuit; the battery and the MCU provide power; The two output ends of the voltage doubler rectifier circuit are connected to the MCU through a signal conditioning circuit and an edge detection circuit; The three output ends of the voltage doubler rectifier circuit are connected to the MCU through the acquisition module; The acceleration sensor is connected to the MCU, and the wireless communication module is connected to the MCU; The MCU is connected to the cloud platform via a wireless communication module.

[0007] Preferably, it also includes a protective shell, an upper cover and a lower cover, the control circuit board, the battery and the vibration energy harvester are all arranged inside the protective shell, the battery and the vibration energy harvester are installed on the lower cover, the upper cover is arranged on the top of the protective shell, and the lower cover is installed on the bottom of the protective shell, and the protective shell, the upper cover and the lower cover are fixedly connected by bolts.

[0008] Preferably, a magnetic base is provided at the bottom of the lower cover, and the magnetic base is connected to the lower cover; when in use, the magnetic base is firmly adsorbed on the vibration device.

[0009] Preferably, fixed strips are provided at both ends of the magnetic base, and fixed connection between the lower cover and the magnetic base is achieved through the fixed strips.

[0010] Preferably, the protective shell is provided with an antenna interface for installing an antenna, and the antenna is connected to the wireless communication module in the control circuit board.

[0011] Preferably, a power switch interface is provided on the upper cover for installing a power switch, and the power switch is connected to the lithium battery.

[0012] A method for operating a start-stop time monitoring device for a vibration device, comprising: When the vibration device starts, mechanical vibration is generated. The vibration energy harvester converts the vibration mechanical energy into electrical energy and outputs it in the form of alternating current. It is then converted into direct current through a voltage doubling rectifier module. The direct current is adjusted to an appropriate voltage level through a signal conditioning circuit. The edge detection circuit triggers and outputs a pulse signal to wake up the MCU from low-power mode. In the working state, the MCU collects the output voltage of the vibration energy harvester and the raw data of the acceleration sensor, and performs fast Fourier transform analysis on the raw data of the acceleration sensor. Combined with the output voltage of the vibration energy harvester, the MCU determines the current working state of the vibration device, and then sends the data and the date and time when the vibration device is started to the cloud platform through the wireless communication module. After the transmission is completed, the entire start-stop time monitoring device enters the low-power standby mode again. When the vibration equipment stops, the vibration energy harvester stops outputting AC power, the output voltage of the voltage-doubling rectifier circuit drops to zero, the output of the signal conditioning circuit also returns to zero, the edge detection circuit triggers and outputs a pulse signal, and after waking up the MCU again, the collected data and the date and time when the vibration stops are sent to the cloud platform through the wireless communication module. After the transmission is completed, the entire start-stop time monitoring device enters the low-power standby mode again.

[0013] Preferably, when the vibration device is in a normal operating mode, the acceleration measurement value output by the acceleration sensor and the output voltage value of the vibration energy harvester are both maintained at a non-zero level; When the vibration equipment enters the shutdown state, the acceleration measurement value output by the acceleration sensor and the output voltage value of the vibration energy harvester will return to zero.

[0014] Preferably, the electric energy generated by the vibration energy harvester is used to charge the battery through a charging circuit.

[0015] Preferably, the MCU also integrates a real-time clock wake-up function, which triggers the self-test mechanism of the start and stop time monitoring device at a preset time interval. The preset time interval is set to the hour or half hour, so that the start and stop time monitoring device of the vibration equipment works in the hour mode and the half hour mode.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The object of the present invention is to provide a start-stop time monitoring device for a vibration device, which uses a vibration energy harvester as a sensor element for detecting the vibration state. The element can be reused as an energy-taking element and used as an energy acquisition device powered by a battery. Through the cooperation of the output circuit, a pulse signal is output only at the start-stop moment of the vibration device. The signal can trigger the MCU on the control circuit board to wake up from the low-power standby mode, and the date and time when the vibration starts or stops, as well as the vibration frequency, amplitude, etc., are sent to the cloud platform through the wireless communication module; at the same time, the MCU also integrates a real-time clock wake-up function, which triggers the system self-test mechanism at preset time intervals to ensure that the entire system can operate continuously and stably. Under the condition that the acceleration environment of the vibration device is as low as 0.02g, the start-stop time monitoring device of the vibration device of the present invention can still maintain a stable monitoring working state without manual intervention and maintenance. The present invention activates the working state only when the vibration device starts and stops and executes the self-test program, and automatically switches to the deep low-power standby mode during the rest of the time, showing excellent ultra-low energy consumption management capabilities.

[0017] Furthermore, this invention utilizes a wireless gateway and cloud platform to visualize all vibration device data in real time. Data can also be uploaded to the customer's private cloud or server via the MQTT protocol. While traditional monitoring devices are limited to observing the status of the device under test, this device incorporates a self-checking mechanism, enabling simultaneous monitoring of both the device under test and the monitoring device itself.

[0018] Furthermore, in the prior art, in order to achieve a low-power design, sensors on the market generally use real-time clock modules for timed data collection. However, once the timing setting is determined at the factory or during initial configuration, it is difficult to flexibly adjust it on site, thereby limiting the system's ability to respond immediately to sudden failures or abnormal situations. The present invention integrates cloud platform remote control technology to achieve a dynamic adjustment function for the time interval for uploading self-test data, allowing operation and maintenance personnel to remotely modify the timing time interval of the monitoring device through the cloud platform without direct contact with the physical equipment. This mechanism greatly enhances the flexibility and response speed of the system, especially when an abnormal situation occurs in the equipment, the data collection frequency can be quickly adjusted to monitor the equipment status more intensively and to detect and locate problems in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a start-stop time monitoring device for vibration equipment of the present invention. Figure 2 This is a schematic diagram of the control circuit board of the present invention. In the figure: protective shell 1, upper cover 2, lower cover 3, fixed pressure strip 4, magnetic base 5, antenna interface 6, power switch interface 7, control circuit board 8, battery 9, vibration energy harvester 10. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain the present invention rather than to limit it.

[0021] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention 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. All the results obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are not included in the description. Reference Figure 1 A start-stop time monitoring device for a vibration device includes a protective housing 1. The housing of the protective housing 1 is provided with an antenna interface 6. The upper cover 2 is provided with a power switch interface 7 and a control circuit board 8. A battery 9 and a vibration energy harvester 10 are mounted on the lower cover 3. By adopting a fixed pressure strip 4, a stable connection between the lower cover 3 and the magnetic base 5 can be achieved, thereby enabling the monitoring device to be directly and firmly adsorbed on the vibration device. The control circuit board 8, battery 9, and vibration energy harvester 10 are all arranged inside the protective housing 1. The battery 9 and vibration energy harvester 10 are mounted on the lower cover 3. The upper cover 2 is arranged on the top of the protective housing 1, and the lower cover 3 is mounted on the bottom of the protective housing 1. The protective housing 1, upper cover 2, and lower cover 3 are fixedly connected by bolts. The battery 9 is a lithium battery; the magnetic base is a permanent magnet or a constant magnet.

[0022] A magnetic base 5 is provided at the bottom of the lower cover 3 , and the magnetic base 5 is connected to the lower cover 3 ; when in use, the magnetic base 5 is firmly adsorbed on the vibration device.

[0023] The two ends of the magnetic base 5 are provided with fixing strips 4 , and the lower cover 3 and the magnetic base 5 are fixedly connected by the fixing strips 4 .

[0024] The start-stop time monitoring device for a vibration device is internally installed with a control circuit board 8, a battery 9, and a vibration energy harvester 10. The vibration energy harvester 10 is connected to the control circuit board 8 to convert vibration mechanical energy into electrical energy, which is used to wake up the MCU 86 in the control circuit board 8 from a low-power standby mode. In addition, it can also charge the lithium battery. The antenna interface 6 on the side of the shell of the protective shell 1 is used to install an antenna. The antenna is connected to the wireless communication module 88 in the control circuit board 8. The wireless communication module 88 can upload data to the cloud platform 11. The upper cover 2 is provided with a power switch interface 7 for installing a power switch. The power switch is connected to the lithium battery 9 and is responsible for regulating the on and off states of the entire system circuit.

[0025] Reference Figure 2 The control circuit board 8 includes a voltage-doubling rectifier circuit 81, a charging circuit 82, a signal conditioning circuit 83, an edge detection circuit 84, an acquisition module 85, an MCU86, an acceleration sensor 87, and a wireless communication module 88. The control circuit board 8 includes a voltage-doubling rectifier circuit 81, a charging circuit 82, a signal conditioning circuit 83, an edge detection circuit 84, an acquisition module 85, an MCU86, an acceleration sensor 87, and a wireless communication module 88. The output end of the vibration energy harvester 10 is connected to the input end of the voltage doubler rectifier circuit 81, and the output end of the voltage doubler rectifier circuit 81 is connected to the battery 9 through the charging circuit 82; the battery 9 and the MCU 86 provide power; The two output ends of the voltage doubler rectifier circuit 81 are connected to the MCU 86 through the signal conditioning circuit 83 and the edge detection circuit 84; The three outputs of the voltage doubler rectifier circuit 81 are connected to the MCU 86 via the acquisition module 85; The acceleration sensor 87 is connected to the MCU 86, and the wireless communication module 88 is connected to the MCU 86; The MCU86 is connected to the cloud platform via the wireless communication module 88.

[0026] The output of the vibration energy harvester 10, via the voltage-doubling rectifier circuit 81, is routed through a charging circuit 82 to charge the lithium battery 9. Another route is routed through a signal conditioning circuit 83 and an edge detection circuit 84 to wake up the MCU 86 on the control circuit board 8 from a low-power standby mode. The lithium battery 9 is connected to the MCU 86. When operating, the MCU 86 collects the output voltage of the vibration energy harvester 10 and the raw data from the accelerometer 87, and performs a fast Fourier transform analysis on the raw data in its internal processing unit. The processed vibration frequency, amplitude, and other parameters, along with the start or stop date and time, are transmitted to the cloud platform 11 via the wireless communication module 88.

[0027] The wireless communication module 88 is optional and includes, but is not limited to, 4G Cat. 1 and LoRa. The cloud platform 11 is optional and includes, but is not limited to, mainstream cloud servers on the market, such as ONENET and Alibaba Cloud, or a customer's private cloud or server.

[0028] The working principle of the present invention is: A start-stop time monitoring device for a vibration device, which firmly connects a lower cover 3 to a magnetic base 5 by using a fixed pressure strip 4, thereby enabling the device to be directly and firmly adsorbed on the vibration device. When the vibration device starts, mechanical vibration is generated. The vibration energy harvester 10 converts the vibration mechanical energy into electrical energy and outputs it in the form of alternating current. It is then converted into direct current through a voltage doubling rectifier module 81. The direct current is adjusted to an appropriate voltage level via a signal conditioning circuit 83. Since the state transition from nothing to something of direct current is regarded as a rising edge of a signal, when this event occurs, the edge detection circuit 84 will trigger and output a pulse signal to wake up the MCU 86 from a low-power mode. The MCU 86 collects the output voltage of the vibration energy harvester 10 and the raw data of the acceleration sensor 87 in the working state, and performs fast Fourier transform analysis on the raw data of the acceleration sensor 87 in its internal processing unit. Combined with the output voltage of the vibration energy harvester 10, the MCU 86 can determine whether the current vibration device is in the start state or the stop state. Specifically, during the normal operating mode of the vibration device, the measured acceleration and the output voltage of the vibration energy harvester 10 remain at a non-zero level. Conversely, when the vibration device enters a shutdown state, both parameters return to zero. The processed vibration frequency, amplitude, and other parameters, along with the date and time when the vibration device was started, are then transmitted to the cloud platform 11 via the wireless communication module 88. Once this transmission is complete, the entire system enters a low-power standby mode again.

[0029] When the vibrating device stops, the vibration energy harvester 10 stops outputting AC power, causing the output voltage of the voltage-doubling rectifier circuit 81 to drop to zero. Accordingly, the output of the signal conditioning circuit 83 also returns to zero. Since the transition from DC power to DC power is considered a falling edge, when this event occurs, the edge detection circuit 84 triggers and outputs a pulse signal, waking up the MCU 86 again. The vibration frequency, amplitude, and other information, along with the date and time of vibration cessation, are then transmitted to the cloud platform 11 via the wireless communication module 88. The electrical energy generated by the vibration energy harvester 10 can also be used to charge the lithium battery 9 via the charging circuit 82, thereby extending the battery's service life.

[0030] At the same time, MCU86 also integrates a real-time clock wake-up function, which triggers the system self-test mechanism at a preset time interval. The preset time interval can be on the hour or half hour, so that the working mode of the start and stop time monitoring device of the vibration device is on the hour or half hour mode, that is, the system works once every hour or half hour. At the same time, for ease of use, the time interval can also be remotely modified through the cloud platform 11. When the wake-up cycle arrives, the MCU86 module is awakened by the RTC clock. MCU86 collects data from the acceleration sensor 87 and reads the output voltage value of the vibration energy harvester 10 through the acquisition module 85. Subsequently, MCU85 compares and analyzes these two sets of data to evaluate the operating status of the vibration device and monitor the working status of the start and stop time status indicator device of the vibration device. For example, in the normal operating mode of the vibration device, its acceleration measurement value and the voltage value output by the vibration energy harvester 10 both maintain a non-zero state. On the contrary, when the vibration device is in the shutdown state, these two parameters are both reset to zero. Furthermore, if the vibration device encounters a failure in the vibration energy harvester 10 during normal operation, the output voltage of the vibration energy harvester 10 will drop to zero, while the acceleration measurement value will remain non-zero. Conversely, if the acceleration sensor 87 fails, the acceleration measurement value will display zero, while the vibration energy harvester 10 will still be able to output a non-zero voltage value. This self-checking mechanism ensures the continuous and stable operation of the entire system.

[0031] Other embodiments should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A start-stop time monitoring device for a vibration device, characterized in that: It includes a control circuit board (8), a battery (9) and a vibration energy harvester (10); The control circuit board (8) includes a voltage doubling rectifier circuit (81), a charging circuit (82), a signal conditioning circuit (83), an edge detection circuit (84), an acquisition module (85), an MCU (86), an acceleration sensor (87), and a wireless communication module (88); The output end of the vibration energy harvester (10) is connected to the input end of the voltage-doubling rectifier circuit (81), and the output end of the voltage-doubling rectifier circuit (81) is connected to the battery (9) through the charging circuit (82); the battery (9) and the MCU (86) provide power; Two output ends of the voltage doubler rectifier circuit (81) are connected to the MCU (86) via a signal conditioning circuit (83) and an edge detection circuit (84); The three output ends of the voltage-doubling rectifier circuit (81) are connected to the MCU (86) via the acquisition module (85); The acceleration sensor (87) is connected to the MCU (86), and the wireless communication module (88) is connected to the MCU (86); The MCU (86) is connected to the cloud platform via a wireless communication module (88).

2. The start-stop time monitoring device for a vibration device according to claim 1, characterized in that: The invention also includes a protective shell (1), an upper cover (2) and a lower cover (3); the control circuit board (8), the battery (9) and the vibration energy harvester (10) are all arranged inside the protective shell (1); the battery (9) and the vibration energy harvester (10) are mounted on the lower cover (3); the upper cover (2) is arranged on the top of the protective shell (1); the lower cover (3) is mounted on the bottom of the protective shell (1); and the protective shell (1), the upper cover (2) and the lower cover (3) are fixedly connected by bolts.

3. The start-stop time monitoring device for a vibration device according to claim 1, characterized in that: A magnetic base (5) is provided at the bottom of the lower cover (3), and the magnetic base (5) is connected to the lower cover (3); when in use, the magnetic base (5) is firmly adsorbed on the vibration device.

4. The start-stop time monitoring device for a vibration device according to claim 1, characterized in that: Fixed pressure strips (4) are provided at both ends of the magnetic base (5), and the fixed pressure strips (4) are used to achieve a fixed connection between the lower cover (3) and the magnetic base (5).

5. The start-stop time monitoring device for vibration equipment according to claim 1, characterized in that: The protective housing (1) is provided with an antenna interface (6) for installing an antenna, and the antenna is connected to the wireless communication module (88) in the control circuit board (8).

6. The start-stop time monitoring device for vibration equipment according to claim 1, characterized in that: The upper cover (2) is provided with a power switch interface (7) for installing a power switch, and the power switch is connected to the lithium battery (9).

7. A method for operating a start-stop time monitoring device for a vibration device according to any one of claims 1 to 6, characterized in that: include, When the vibration device is started, mechanical vibration is generated. The vibration energy harvester (10) converts the vibration mechanical energy into electrical energy and outputs it in the form of alternating current. The energy is then converted into direct current through a voltage doubling rectifier module (81). The direct current is adjusted to an appropriate voltage level through a signal conditioning circuit (83). The edge detection circuit (84) triggers and outputs a pulse signal to wake up the MCU (86) from the low power mode. The MCU (86) collects the output voltage of the vibration energy harvester (10) and the raw data of the acceleration sensor (87) in the working state, and performs fast Fourier transform analysis on the raw data of the acceleration sensor (87). Combined with the output voltage of the vibration energy harvester (10), the MCU (86) determines the current working state of the vibration device and then sends the data and the date and time when the vibration device is started to the cloud platform (11) through the wireless communication module (88). After the sending is completed, the entire start-stop time monitoring device enters the low power standby mode again. When the vibration device stops, the vibration energy harvester (10) stops outputting AC power, the output voltage of the voltage doubler rectifier circuit (81) drops to zero, the output of the signal conditioning circuit (83) also returns to zero, the edge detection circuit (84) triggers and outputs a pulse signal, wakes up the MCU (86) again, and sends the collected data and the date and time when the vibration stops to the cloud platform (11) through the wireless communication module (88). After the transmission is completed, the entire start-stop time monitoring device enters the low-power standby mode again.

8. The operating method of the start-stop time monitoring device of a vibration equipment according to claim 7, characterized in that: When the vibration device is in a normal operating mode, the acceleration measurement value output by the acceleration sensor (87) and the output voltage value of the vibration energy harvester (10) are both maintained at a non-zero level; When the vibration device enters the shutdown state, the acceleration measurement value output by the acceleration sensor (87) and the output voltage value of the vibration energy harvester (10) will return to zero.

9. The operating method of the start-stop time monitoring device of a vibration equipment according to claim 7, characterized in that: The electric energy generated by the vibration energy harvester (10) is used to charge the battery (9) via the charging circuit (82).

10. The operating method of the start-stop time monitoring device of a vibration equipment according to claim 7, characterized in that: The MCU (86) also integrates a real-time clock wake-up function, which triggers the self-check mechanism of the start-stop time monitoring device at a preset time interval. The preset time interval is set to the hour or half-hour, so that the start-stop time monitoring device of the vibration equipment operates in the hour mode and the half-hour mode.

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