A driving device and method for achieving constant amplitude operation of an electromagnetic vibrator

Abstract

This invention discloses a driving device and method for achieving constant amplitude operation of an electromagnetic vibrator, relating to the field of maintaining constant amplitude vibration in electromagnetic vibrators. The driving device includes an accelerometer, an acceleration detection board, a vibrator drive board, a host computer, and alarm lights. The driving device uses the accelerometer to collect vibration acceleration data from the electromagnetic vibrator, processes the vibration acceleration data using the acceleration detection board to obtain the amplitude value of the electromagnetic vibrator, detects abnormal amplitude values, and automatically adjusts the voltage and / or frequency of the periodic drive signal of the vibrator drive board to achieve constant amplitude operation of the electromagnetic vibrator. This invention's driving device maintains stable operation of the electromagnetic vibrator by automatically adjusting its vibration amplitude, which is beneficial for efficient operation, saves energy consumption, and extends the service life of the electromagnetic vibrator.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic vibrator amplitude constant vibration technology, and more particularly to a driving device and method for achieving constant amplitude operation of an electromagnetic vibrator. Background Technology

[0002] Electromagnetic vibrators are devices that can uniformly, continuously, and timely convey blocky, granular, and powdery materials to a receiving device. They are currently widely used in the color sorter industry and other related industries.

[0003] Electromagnetic vibrators utilize the principle of near resonance. During operation, the driving frequency is close to the mechanical frequency of the electromagnetic vibrator. Over long-term use, the electromagnetic vibrator is affected by factors such as weight and spring stiffness, which causes the spring to age. This leads to changes in the driving frequency and amplitude, resulting in a shift between the driving frequency and the resonant frequency. Consequently, the vibration amplitude of the electromagnetic vibrator changes, and these changes can be reflected in the acceleration data collected by the accelerometer.

[0004] Patent application number 201721796559.5 discloses an electromagnetic vibrator, including a sealing ring, a coil frame, and a base. The electromagnetic vibrator provides vibration driving force to a vibrating object. The coil frame is placed inside the cavity of the base. The tail end of the sealing ring is positioned between the base and the coil frame, and the head end of the sealing ring abuts against the vibrating object. Using the electromagnetic vibrator provided in this application, because one end of the sealing ring is positioned between the base and the coil frame, a more reliable seal is achieved, preventing problems such as poor sealing or even failure of the sealing ring due to improper control of the compression pressure. However, this electromagnetic vibrator has the problem of not being able to adjust for constant amplitude operation.

[0005] In reality, there is a need for a driving device and method to achieve constant amplitude operation of an electromagnetic vibrator, which can achieve constant amplitude operation of the electromagnetic vibrator by adjusting the driving signal. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to provide a driving device and method for achieving constant amplitude operation of an electromagnetic vibrator, which maintains constant amplitude operation of the electromagnetic vibrator by automatically adjusting the voltage and / or frequency of the driving signal.

[0007] The objective of this invention can be achieved through the following technical solution: a driving device for achieving constant amplitude operation of an electromagnetic vibrator, comprising:

[0008] An accelerometer is installed on the tank of the electromagnetic vibrator to collect vibration acceleration data of the electromagnetic vibrator.

[0009] An acceleration detection board is electrically connected to an acceleration sensor to collect, analyze, and process vibration acceleration data to obtain the amplitude value of the electromagnetic vibrator.

[0010] The vibrator drive board is electrically connected to the acceleration sensor and the host computer, providing periodic drive signals to the electromagnetic vibrator coil;

[0011] The host computer automatically adjusts the voltage and / or frequency of the periodic drive signal of the vibrator drive board based on the abnormal amplitude value of the electromagnetic vibrator, so as to achieve constant amplitude operation of the electromagnetic vibrator.

[0012] As a further aspect of the present invention, it also includes:

[0013] The alarm light provides an audible and visual alarm when the amplitude of the electromagnetic vibrator exceeds the threshold.

[0014] As a further embodiment of the present invention, the host computer includes:

[0015] A touch display for displaying the vibration waveform of an electromagnetic vibrator, and accepting manual touch intervention to adjust the periodic drive signal voltage and / or frequency.

[0016] As a further embodiment of the present invention, the electromagnetic vibrator structure includes: a groove, a mounting plate, a spring, a cover plate, a casting, and a vibration assembly, wherein:

[0017] The groove and the mounting plate are fixed by bolts. One end of the spring is fixed to the mounting plate and the other end is fixed to the casting. A cavity is opened in the casting. A vibration component is installed in the cavity. The vibration component connects the casting and the mounting plate. The vibration generated by the vibration component drives the mounting plate and the groove to vibrate.

[0018] As a further embodiment of the present invention, the vibration assembly includes a front iron core, a rear iron core, and a coil, wherein:

[0019] The front iron core is fixed on the mounting plate, the rear iron core is mounted on the cover plate, the cover plate is fixed to the casting by bolts, the coil is placed in the cavity of the casting, the coil is hollow, and the front iron core and the rear iron core are placed inside, one end of the coil is inside the casting, and the other end abuts against the cover plate, and the coil is electrically connected to the vibrator drive plate.

[0020] A method for achieving constant amplitude operation of an electromagnetic vibrator using the aforementioned driving device, the method comprising:

[0021] S1. Install an acceleration sensor in the tank of the electromagnetic vibrator. The acceleration sensor collects the vibration acceleration data of the tank under working conditions.

[0022] S2. Send the vibration acceleration data to the acceleration detection board, analyze and process the vibration acceleration data using the acceleration detection board, and send it to the host computer.

[0023] S3. Based on the processed acceleration data, the host computer determines any abnormalities in the amplitude of the electromagnetic vibrator and automatically adjusts the voltage and / or frequency of the periodic drive signal to maintain a constant amplitude of the electromagnetic vibrator.

[0024] As a further embodiment of the present invention, the method further includes:

[0025] The host computer generates acceleration waveform data based on the processed acceleration data, displays the acceleration waveform on a touch screen, and allows manual intervention to adjust the voltage and / or frequency of the cycle drive signal based on the displayed acceleration waveform and alarm signal, so as to maintain the constant amplitude of the electromagnetic vibrator.

[0026] As a further embodiment of the present invention, in step S4, the operation of the electromagnetic vibrator with a constant amplitude is maintained by adjusting the voltage of the periodic drive signal, including when

[0027] Compare the acceleration value of the electromagnetic vibrator with the target value:

[0028] When the acceleration value is greater than the target value, the voltage of the periodic drive signal is reduced until the acceleration value equals the target value.

[0029] When the acceleration value is less than the target value, the voltage of the periodic drive signal is increased until the acceleration value equals the target value.

[0030] As a further embodiment of the present invention, step S4 involves maintaining the electromagnetic vibrator's amplitude constant by adjusting the frequency of the periodic drive signal, including comparing the drive frequency with the vibrator's resonant frequency.

[0031] When the driving frequency is greater than the resonant frequency, reduce the driving frequency until the acceleration value equals the target value.

[0032] When the driving frequency is lower than the resonant frequency, increase the driving frequency until the acceleration value equals the target value.

[0033] As a further embodiment of the present invention, step S4, which utilizes the frequency and voltage of the adjusted periodic drive signal to maintain the constant amplitude of the electromagnetic vibrator, includes:

[0034] Adjust the driving frequency to be close to the resonant frequency. When the acceleration value is less than the target value, increase the voltage of the periodic driving signal until the acceleration value equals the target value.

[0035] Adjust the driving frequency to be close to the resonant frequency. When the acceleration value is greater than the target value, reduce the voltage of the periodic driving signal until the acceleration value equals the target value.

[0036] The beneficial effects of this invention are:

[0037] 1. This invention installs an acceleration sensor in the tank of an electromagnetic vibrator. The acceleration sensor collects vibration acceleration data during the working state of the tank. The drive device analyzes and processes the vibration acceleration data. Based on the analysis and processing results, the vibration amplitude of the electromagnetic vibrator can be automatically adjusted to maintain stable operation of the electromagnetic vibrator. Using this device is beneficial to the efficient operation of the electromagnetic vibrator, and can save energy consumption and extend the service life of the electromagnetic vibrator.

[0038] 2. This invention proposes multiple adjustment schemes by adjusting the voltage and / or frequency of the periodic drive signal, which can flexibly adjust the vibration amplitude of the electromagnetic vibrator and maintain the stable operation of the electromagnetic vibrator.

[0039] 3. This invention, through the alarm light and touch display, can promptly issue an over-threshold alarm during the operation of the electromagnetic vibrator and allow for manual touch intervention to maintain the constant amplitude of the electromagnetic vibrator, further improving the safety and reliability of the electromagnetic vibrator's operation. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the connection structure between the driving device and the electromagnetic vibrator of the present invention;

[0041] Figure 2 This is a schematic diagram of the electromagnetic vibrator of the present invention;

[0042] Figure 3 This is a schematic diagram of the acceleration detection plate of the present invention;

[0043] Figure 4 This is a flowchart illustrating the method for achieving constant amplitude of an electromagnetic vibrator according to the present invention.

[0044] 100. Electromagnetic vibrator; 110. Tank; 120. Mounting plate; 130. Spring; 140. Cover plate; 150. Casting; 151. Cavity; 160. Vibration assembly; 161. Front core; 162. Rear core; 163. Coil;

[0045] 200. Drive unit; 210. Accelerometer sensor; 220. Accelerometer detection board; 230. Vibrator drive board; 240. Host computer; 241. Touch screen display; 250. Alarm light; 260. Housing. Detailed Implementation

[0046] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] like Figure 1 As shown, the present invention discloses a driving device for achieving constant amplitude operation of an electromagnetic vibrator, including: an acceleration sensor 210, an acceleration detection plate 220, a vibrator driving plate 230, and a host computer 240, etc.

[0048] The acceleration sensor 210 is installed on the tank 110 of the electromagnetic vibrator 100 to collect the vibration acceleration data of the electromagnetic vibrator 100.

[0049] The electromagnetic vibrator 100 is a device that can uniformly, continuously, and timely convey blocky, granular, and powdery materials to the receiving device. It is currently widely used in the color sorter industry and other related industries.

[0050] like Figure 2 As shown, the structure of the electromagnetic vibrator 100 includes a tank 110, a mounting plate 120, a spring 130, a cover plate 140, a casting 150, and a vibration assembly 160, etc.

[0051] The groove 110 is fixed to the mounting plate 120 by bolts. One end of the spring piece 130 is fixed to the mounting plate 120 and the other end is fixed to the casting 150. A cavity 151 is opened in the casting 150. A vibration component 160 is installed in the cavity 151. The vibration component 160 connects the casting 150 and the mounting plate 120. The vibration generated by the vibration component 160 drives the mounting plate 120 and the groove 110 to vibrate.

[0052] Specifically, such as Figure 2 As shown, the vibration assembly 160 includes a front iron core 161, a rear iron core 162, and a coil 163. The front iron core 161 is fixed on the mounting plate 120, and the rear iron core 162 is mounted on the cover plate 140. The cover plate 140 is fixed to the casting 150 by bolts. The coil 163 is placed inside the cavity 151 of the casting 150. The coil 163 is hollow and can accommodate the front iron core 161 and the rear iron core 162. One end of the coil 163 is inside the casting 150, and the other end rests against the cover plate 140.

[0053] The coil 163 is electrically connected to the vibrator drive plate 230. The coil 163 is controlled by the periodic drive signal emitted by the vibrator drive plate 230. When the power is on, the coil 163 generates a magnetic field. The iron core is displaced under the action of the magnetic field, which pulls the spring 130 to deform, thereby causing the groove 110 to move. When the power is off, the magnetic field force disappears, the spring 130 returns to its original state, and the groove 110 moves in the opposite direction, thus completing one cycle of motion. Continuous drive enables the vibrator to work.

[0054] When the electromagnetic vibrator 100 is working, the electromagnetic vibrator 100 is affected by its weight and the stiffness of the spring 130. Due to the aging of the spring 130 and changes in the material in the tank 110, the vibration amplitude and frequency of the electromagnetic vibrator 100 will change. Therefore, during long-term use, the amplitude of the electromagnetic vibrator 100 cannot operate at a constant value and needs to be adjusted.

[0055] An accelerometer 210 is installed on the tank 110 of the electromagnetic vibrator 100 to collect vibration acceleration data of the tank 110 during operation. When the electromagnetic vibrator 100 is working, the vibration direction is as shown in the figure. The Y direction is the main direction of material movement. The material moves forward due to vibration in the Z direction and the slight downward tilt of the hopper. Excessive vibration will cause the material to feed too quickly, resulting in low color sorting accuracy; insufficient vibration will affect the color sorting output. Vibration in the X direction will cause the material to move left and right.

[0056] Multiple tests and experiments revealed that the vibration amounts in the X and Y directions were not significant, so the vibration parameters in the Z direction were the primary focus of testing. The parameters in the Z direction serve as the key parameters for assessing whether the entire electromagnetic vibrator meets the standards.

[0057] In view of this feature, when using the accelerometer 210 to detect the electromagnetic vibrator 100, the accelerometer 210 can be installed on the XZ or YZ side plate of the tank 110. It mainly collects the vibration amplitude change generated by the tank 110 in the Z direction. The collected data can reflect the amplitude of the electromagnetic vibrator 100 during operation.

[0058] like Figure 1 As shown, two accelerometers 210 can be used as a group, with each accelerometer 210 serving as a backup for the other. When one accelerometer 210 fails to work, it can operate normally based on the value used by the other accelerometer 210.

[0059] Accelerometer 210 is electrically connected to acceleration detection board 220. Accelerometer 220 collects and analyzes vibration acceleration data to obtain the vibration amplitude value of electromagnetic vibrator 100.

[0060] The acceleration detection board 220 is installed inside the housing 260 of the drive unit 200 or on top of the housing 260. The acceleration detection board 220 adopts an FPGA processing board.

[0061] like Figure 3 As shown, the core of the FPGA processing board is an FPGA chip, which is connected to an I / O interface. The FPGA chip is connected to an accelerometer 210 through the I / O interface to obtain vibration acceleration data.

[0062] Accelerometer 210 needs to be configured to perform vibration data acquisition. The main configuration signals for accelerometer 210 are sampling clock, chip select, and control signal. The sampling clock can be determined by the system clock of drive device 200. The chip select signal determines whether accelerometer 210 works, and the control signal determines the working mode of accelerometer 210. After the FPGA chip receives the start sampling command from the user, the chip select signal drops to a low level and is set to a high level only when the user stops sampling. The sampling clock follows the system clock setting. The control signal is determined according to the specifications of accelerometer 210.

[0063] The DC-DC chip is mainly used to divide the connected DC power supply to provide different operating voltages. As shown in the figure, the power supply of the accelerometer 210 is obtained through the FPGA processing board. Only a small chip needs to be selected on the vibration accelerometer 210 to obtain the 3.3V power supply voltage required by all the components of the sensor, without the need for a large area of ​​DC-DC conversion circuit. The 2.5V power supply of the JTAG interface VCCAUX is also obtained through the DC-DC chip. The 1.2V operating voltage VCCINT of the FPGA chip core also comes from the DC-DC chip. It is connected to the host computer 240 through the RS bus, and the host computer 240 interacts with the touch display 241 to exchange data.

[0064] After the FPGA chip obtains the vibration acceleration data of the electromagnetic vibrator 100, it processes and analyzes the data and sends it to the host computer 240 to communicate with the host computer 240 to complete the data interaction.

[0065] Communication can be achieved using the RS bus, a half-duplex communication method. A driver is required to assist in data transmission, thereby increasing data transmission efficiency. The driver circuit converts the RS-corresponding interface signal to enable communication between the touchscreen display 241 or the host computer 240 and the board. The RJ connector is used for communication, offering good compatibility. The JTAG interface is used for FPGA chip debugging. Through the JTAG interface, the timing relationships of various signals in the FPGA chip can be continuously checked to determine if the status of each signal meets the requirements, thus continuously debugging and improving the FPGA processing board's operating status.

[0066] Based on the abnormal amplitude value of the electromagnetic vibrator 100, the host computer 240 automatically controls the vibrator drive board 230 to adjust the provided periodic drive signal to achieve constant amplitude of the electromagnetic vibrator.

[0067] The touch display 241 displays the waveform data generated by the acceleration detection board 220. The touch display 241 is integrated with the host computer 240. The touch display 241 is connected to the host computer 240. Using the touch display 241, the voltage and / or frequency of the cycle drive signal can be manually adjusted by touch.

[0068] Furthermore, it also includes an alarm light 250, which is electrically connected to the host computer 240. It can provide audible and visual alarms when the amplitude value of the electromagnetic vibrator 100 exceeds the threshold. When the audible and visual alarm occurs, the voltage and / or frequency of the drive signal can be manually adjusted through the touch display 241 to adjust the amplitude of the electromagnetic vibrator and troubleshoot the fault.

[0069] like Figure 4 As shown, the present invention also discloses a method for achieving constant amplitude operation of an electromagnetic vibrator applied to the above-mentioned driving device, the method comprising:

[0070] S1. An acceleration sensor 210 is installed in the tank 110 of the electromagnetic vibrator 100. The acceleration sensor 210 collects the vibration acceleration data of the tank 110 under working conditions.

[0071] By installing an acceleration sensor 210 in the tank 110 of the electromagnetic vibrator 100, the vibration amplitude change of the electromagnetic vibrator 100 can be collected, thereby detecting abnormal vibration of the electromagnetic vibrator 100.

[0072] The electromagnetic vibrator 100 utilizes the near-resonance principle. During operation, the driving frequency must be close to the mechanical frequency of the electromagnetic vibrator 100. Over long-term use, the electromagnetic vibrator 100 is affected by its weight and the stiffness of the spring 130. Due to the aging of the spring 130 and changes in the material in the tank 110, its driving frequency will change, causing a deviation between the driving frequency and the resonant frequency. This results in changes in the vibration amplitude of the electromagnetic vibrator 100. These changes can be reflected by the vibration acceleration data collected by the acceleration sensor 210.

[0073] S2. Send the vibration acceleration data to the acceleration detection board 220, use the acceleration detection board 220 to analyze and process the vibration acceleration data, and send it to the host computer 240.

[0074] An accelerometer 210 and an acceleration detection board 220 are connected by a data line for data transmission. After acquiring the data, the acceleration detection board 220 integrates the data and transmits it to the host computer 240. The waveform of the acceleration change can be seen through the touch display 241 of the host computer 240. The host computer 240 is connected to a vibration drive board, which provides a periodic drive signal to make the coil 163 generate a periodically changing magnetic field.

[0075] S3. Based on the processed acceleration data, the host computer 240 determines the abnormal amplitude of the electromagnetic vibrator and automatically adjusts the voltage and / or frequency of the periodic drive signal to maintain the constant amplitude of the electromagnetic vibrator 100.

[0076] Based on the acquired vibration acceleration data, the host computer 240 can determine any abnormalities in the operation of the acceleration sensor 210 and automatically adjust the voltage and / or frequency of the periodic drive signal to maintain a constant amplitude of the electromagnetic vibrator 100. Specifically, this includes:

[0077] The host computer 240 compares the acceleration value of the electromagnetic vibrator 100 with the target value, which can be obtained by setting the target value.

[0078] When the acceleration value is greater than the target value, it can be considered that the vibration amplitude of the electromagnetic vibrator 100 is too large. The output of the vibration drive board can be controlled by the host computer 240 to reduce the voltage of the periodic drive signal and reduce the vibration amplitude of the electromagnetic vibrator 100 until the acceleration value equals the target value.

[0079] When the acceleration value is less than the target value, it can be considered that the vibration amplitude of the electromagnetic vibrator 100 is too small. The output of the vibration drive board can be controlled by the host computer 240 to increase the voltage of the periodic drive signal and increase the vibration amplitude of the electromagnetic vibrator 100 until the acceleration value equals the target value.

[0080] Furthermore, the frequency of the periodic drive signal output by the vibration drive board can be controlled by the host computer 240 to maintain the constant amplitude of the electromagnetic vibrator 100.

[0081] When the electromagnetic vibrator 100 is working, the driving frequency needs to be close to the mechanical frequency of the electromagnetic vibrator 100 for the maximum vibration amplitude. With long-term use, when the driving frequency deviates from the resonant frequency, the amplitude will decrease whether the driving frequency of the electromagnetic vibrator 100 is less than or greater than the resonant frequency point. The purpose of frequency conversion control is to keep the driving frequency close to the resonant frequency of the vibrator.

[0082] Specifically, when the vibration amplitude of the electromagnetic vibrator 100 changes, the driving frequency can be compared with the resonant frequency of the vibrator.

[0083] When the driving frequency is greater than the resonant frequency, lower the driving frequency until the acceleration value equals the target value; when the driving frequency is less than the resonant frequency, raise the driving frequency until the acceleration value equals the target value.

[0084] This ensures that the driving frequency is always close to the resonant frequency of the vibrator, so that the vibration amplitude of the electromagnetic vibrator 100 remains stable and meets the requirements.

[0085] Furthermore, when the vibration amplitude of the electromagnetic vibrator 100 changes, the amplitude of the electromagnetic vibrator can be kept constant by adjusting the frequency and voltage of the periodic drive signal.

[0086] First, adjust the frequency of the periodic drive signal. By increasing or decreasing the frequency of the periodic drive signal, make the drive frequency close to the resonant frequency of the vibrator. If the vibration acceleration value is not equal to the target value at this time, the voltage of the periodic drive signal can be further adjusted to make the vibration acceleration value equal to the target value. Specifically, this includes:

[0087] Adjust the drive frequency to be close to the resonant frequency. When the acceleration value is less than the target value, increase the voltage of the periodic drive signal until the acceleration value is still the target value. Adjust the drive frequency to be close to the resonant frequency. When the acceleration value is greater than the target value, decrease the voltage of the periodic drive signal until the acceleration value is equal to the target value.

[0088] By using the above adjustment methods, the frequency and voltage of the periodic drive signal can be automatically adjusted by the host computer 240 to make the monitored acceleration value equal to the target value, thereby maintaining the constant vibration amplitude of the electromagnetic vibrator 100.

[0089] Furthermore, when the acceleration sensor 210 detects that the vibration amplitude of the electromagnetic vibrator 100 is too large and exceeds the set threshold, the touch screen display 241 will show an obvious abnormality in the acceleration waveform. This indicates that an abnormal situation has occurred during the operation of the electromagnetic vibrator 100, such as excessive load or machine jamming. At this time, the alarm light 250 will emit an audible and visual alarm. The operator can intervene in the operation of the electromagnetic vibrator 100 through the touch screen display 241, manually adjust the frequency and voltage of the drive signal, or shut down the machine to troubleshoot and maintain the constant amplitude of the electromagnetic vibrator 100.

[0090] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0091] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

Claims

1. A method for maintaining constant amplitude operation of an electromagnetic vibrator, characterized in that, The method includes: S1. An acceleration sensor (210) is installed in the tank (110) of the electromagnetic vibrator (100). The acceleration sensor (210) collects the vibration acceleration data of the tank (110) under working conditions. S2. Send the vibration acceleration data to the acceleration detection board (220), use the acceleration detection board (220) to analyze and process the vibration acceleration data, and send it to the host computer (240). S3. The host computer (240) judges the abnormality of the electromagnetic vibrator amplitude based on the processed acceleration data, and automatically adjusts the voltage and / or frequency of the periodic drive signal of the drive device to maintain the constant amplitude of the electromagnetic vibrator (100). The S3 method utilizes the frequency and voltage of the adjusted periodic drive signal to maintain the constant amplitude of the electromagnetic vibrator (100), including: Adjust the driving frequency to be close to the resonant frequency. When the acceleration value is less than the target value, increase the voltage of the periodic driving signal until the acceleration value equals the target value. Adjust the driving frequency to be close to the resonant frequency. When the acceleration value is greater than the target value, reduce the voltage of the periodic driving signal until the acceleration value equals the target value. The driving device includes: An accelerometer (210) is installed on the tank (110) of the electromagnetic vibrator (100) to collect vibration acceleration data of the electromagnetic vibrator (100); An acceleration detection plate (220) is electrically connected to an acceleration sensor (210) to collect and analyze vibration acceleration data and obtain the amplitude value of the electromagnetic vibrator (100); The vibrator drive board (230) is electrically connected to the acceleration sensor (210) and the host computer (240) to provide periodic drive signals to the coil (163) of the electromagnetic vibrator (100); The host computer (240) automatically adjusts the voltage and / or frequency of the periodic drive signal of the vibrator drive board (230) based on the abnormal amplitude value of the electromagnetic vibrator (100) to achieve constant amplitude operation of the electromagnetic vibrator (100).

2. The method for constant amplitude operation of an electromagnetic vibrator according to claim 1, characterized in that, The drive device further includes: An alarm light (250) is used to provide an audible and visual alarm when the amplitude value of the electromagnetic vibrator (100) exceeds the threshold.

3. The method for constant amplitude operation of an electromagnetic vibrator according to claim 2, characterized in that, The host computer (240) includes: A touch display (241) is used to display the vibration waveform of the electromagnetic vibrator (100) and to accept manual touch intervention to adjust the periodic drive signal voltage and / or frequency.

4. The method for constant amplitude operation of an electromagnetic vibrator according to claim 1, characterized in that, The electromagnetic vibrator (100) comprises: a tank (110), a mounting plate (120), a spring (130), a cover plate (140), a casting (150), and a vibration assembly (160), wherein: The groove (110) is fixed to the mounting plate (120) by bolts. One end of the spring (130) is fixed on the mounting plate (120) and the other end is fixed on the casting (150). A cavity (151) is opened in the casting (150). A vibration component (160) is provided in the cavity (151). The vibration component (160) connects the casting (150) and the mounting plate (120). The vibration generated by the vibration component (160) drives the mounting plate (120) and the groove (110) to vibrate.

5. The method for constant amplitude operation of an electromagnetic vibrator according to claim 4, characterized in that, The vibration assembly (160) includes a front iron core (161), a rear iron core (162), and a coil (163), wherein: The front core (161) is fixed on the mounting plate (120), the rear core (162) is mounted on the cover plate (140), the cover plate (140) is fixed on the casting (150) by bolts, the coil (163) is placed in the cavity (151) of the casting (150), the coil (163) is hollow, and the front core (161) and the rear core (162) are placed inside it. One end of the coil (163) is inside the casting (150), and the other end abuts against the cover plate (140). The coil (163) is electrically connected to the vibrator drive plate (230).

6. The method for constant amplitude operation of an electromagnetic vibrator according to claim 1, characterized in that, The method further includes: The host computer (240) generates acceleration waveform data based on the processed acceleration data and displays the acceleration waveform through a touch screen (241). Based on the displayed acceleration waveform and alarm signal, the host computer manually intervenes to adjust the voltage and / or frequency of the cycle drive signal to maintain the constant amplitude of the electromagnetic vibrator (100).

7. The method for constant amplitude operation of an electromagnetic vibrator according to claim 1, characterized in that, In S3, the voltage of the periodic drive signal is adjusted to maintain the constant amplitude of the electromagnetic vibrator (100), including comparing the acceleration value of the electromagnetic vibrator (100) with the target value: When the acceleration value is greater than the target value, the voltage of the periodic drive signal is reduced until the acceleration value equals the target value. When the acceleration value is less than the target value, the voltage of the periodic drive signal is increased until the acceleration value equals the target value.

8. The method for constant amplitude operation of an electromagnetic vibrator according to claim 1, characterized in that, In step S3, the frequency of the periodic drive signal is adjusted to maintain the constant amplitude of the electromagnetic vibrator (100), including comparing the drive frequency with the resonant frequency of the vibrator: When the driving frequency is greater than the resonant frequency, reduce the driving frequency until the acceleration value equals the target value. When the driving frequency is lower than the resonant frequency, increase the driving frequency until the acceleration value equals the target value.

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