Driving device and method for achieving constant-amplitude operation of electromagnetic vibrator

Abstract

The invention discloses a driving device and method for achieving constant-amplitude operation of an electromagnetic vibrator, and relates to the technical field of keeping constant-amplitude vibration of the electromagnetic vibrator, and the driving device comprises an acceleration sensor, an acceleration detection plate, a vibrator driving plate, an upper computer, an alarm lamp and the like. The driving device collects vibration acceleration data of the electromagnetic vibrator through an acceleration sensor, processes the vibration acceleration data through an acceleration detection plate, obtains the amplitude value of the electromagnetic vibrator, obtains the abnormal condition of the amplitude value of the electromagnetic vibrator, and automatically adjusts the voltage and / or frequency of a periodic driving signal of a vibrator driving plate. And constant-amplitude operation of the electromagnetic vibrator is realized. According to the driving device, the vibration amplitude of the electromagnetic vibrator is automatically adjusted, stable operation of the electromagnetic vibrator is kept, efficient operation of the electromagnetic vibrator is facilitated, meanwhile, energy consumption of the electromagnetic vibrator is reduced, and the service life of the electromagnetic vibrator is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of maintaining constant amplitude vibration of an electromagnetic vibrator, and in particular to a driving device and method for achieving constant amplitude operation of an electromagnetic vibrator. Background Art

[0002] Electromagnetic vibrator is a device that can transport bulk, granular and powdered materials to the receiving device evenly, continuously and on time. It is currently widely used in the color sorter industry and other related industries.

[0003] The electromagnetic vibrator uses the principle of near resonance. The driving frequency is close to the mechanical frequency of the electromagnetic vibrator when it is working. After long-term use, the electromagnetic vibrator is affected by weight, shrapnel stiffness, etc., which causes aging of the shrapnel, changes in its driving frequency and amplitude, and causes the driving frequency and resonance frequency to shift, causing the vibration amplitude of the electromagnetic vibrator to change. These changes can be reflected in the acceleration data collected by the acceleration sensor.

[0004] Patent document with application number 201721796559.5 discloses an electromagnetic vibrator, including a sealing ring, a coil skeleton, and a base. The electromagnetic vibrator is used to provide a vibration driving force for a vibrating object. The coil skeleton is placed in the cavity of the base, the tail section of the sealing ring is arranged between the base and the coil skeleton, and the head section of the sealing ring is against the vibrating object. Using the electromagnetic vibrator provided by this application, since one end of the sealing ring is arranged between the base and the coil skeleton, a more reliable seal is achieved, which can prevent the sealing ring from having a poor sealing effect or even failing due to improper control of the extrusion force. However, the electromagnetic vibrator of its solution has the problem of being unable to adjust the amplitude constant operation.

[0005] In reality, a driving device and method for achieving constant amplitude operation of an electromagnetic vibrator is needed, and the constant amplitude operation of the electromagnetic vibrator can be achieved by adjusting the driving signal. Summary of the invention

[0006] In view of the above-mentioned problems, the object of the present invention is to provide a driving device and method for achieving constant amplitude operation of an electromagnetic vibrator, by automatically adjusting the voltage and / or frequency of the driving signal to maintain constant amplitude operation of the electromagnetic vibrator.

[0007] The object of the present invention can be achieved by the following technical solution: A driving device for realizing constant amplitude operation of an electromagnetic vibrator, comprising:

[0008] An acceleration sensor is installed on the slot of the electromagnetic vibrator to collect vibration acceleration data of the electromagnetic vibrator;

[0009] The acceleration detection board is electrically connected to the acceleration sensor, collects and analyzes the vibration acceleration data, and obtains the amplitude value of the electromagnetic vibrator;

[0010] A vibrator driving board is electrically connected to the acceleration sensor and the host computer to provide a periodic driving signal for the electromagnetic vibrator coil;

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

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

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

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

[0015] A touch display, wherein the touch display is used to display the vibration waveform of the electromagnetic vibrator and accept the adjustment of the voltage and / or frequency of the periodic driving signal by manual touch intervention.

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

[0017] The trough body and the mounting plate are fixed by bolts, one end of the spring is fixed on the mounting plate, and the other end is fixed on the casting, a cavity is opened in the casting, a vibration component is arranged in the cavity, the vibration component connects the casting and the mounting plate, and the vibration generated by the vibration component drives the mounting plate and the trough body to vibrate.

[0018] As a further solution 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 casting cavity, the coil is hollow, and the front iron core and the rear iron core are placed therein, one end of the coil is in the casting, and the other end is against the cover plate, and the coil is electrically connected to the vibrator driving plate.

[0020] A method for realizing constant amplitude operation of an electromagnetic vibrator using the above-mentioned driving device, the method comprising:

[0021] S1. Install an acceleration sensor in the tank body of the electromagnetic vibrator, and the acceleration sensor collects vibration acceleration data of the tank body in a working state;

[0022] S2, sending the vibration acceleration data to the acceleration detection board, using the acceleration detection board to analyze and process the vibration acceleration data, and sending it to the host computer;

[0023] S3. The host computer determines the abnormality of the amplitude of the electromagnetic vibrator based on the processed acceleration data, and automatically adjusts the voltage and / or frequency of the periodic drive signal to keep the amplitude of the electromagnetic vibrator constant.

[0024] As a further aspect of the present invention, the method further comprises:

[0025] The host computer generates acceleration waveform data based on the processed acceleration data, displays the acceleration waveform by touching the touch display, and adjusts the voltage and / or frequency of the periodic drive signal through manual touch intervention based on the displayed acceleration waveform and alarm signal to keep the electromagnetic vibrator running with a constant amplitude.

[0026] As a further solution of the present invention, the voltage of the periodic driving signal is adjusted in S4 to maintain the electromagnetic vibrator with a constant amplitude, 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 is equal to 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 is equal to the target value.

[0030] As a further solution of the present invention, the operation of maintaining the electromagnetic vibrator with a constant amplitude by adjusting the frequency of the periodic driving signal in S4 includes comparing the driving frequency with the resonant frequency of the vibrator:

[0031] When the driving frequency is greater than the resonance frequency, the driving frequency is lowered until the acceleration value is equal to the target value;

[0032] When the driving frequency is less than the resonance frequency, the driving frequency is increased until the acceleration value is equal to the target value.

[0033] As a further solution of the present invention, the operation of maintaining the electromagnetic vibrator with a constant amplitude by adjusting the frequency and voltage of the periodic driving signal in S4 includes:

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

[0035] The driving frequency is adjusted to be close to the resonance frequency. When the acceleration value is greater than the target value, the voltage of the periodic driving signal is lowered until the acceleration value is equal to the target value.

[0036] Beneficial effects of the present invention:

[0037] 1. The present invention installs an acceleration sensor on the slot body of the electromagnetic vibrator. The acceleration sensor collects vibration acceleration data of the slot body in a working state. The driving device analyzes and processes the vibration acceleration data. According to the analysis and processing results, the vibration amplitude of the electromagnetic vibrator can be automatically adjusted to maintain the stable operation of the electromagnetic vibrator. The use of this device is conducive to the efficient operation of the electromagnetic vibrator, and can also save the energy consumption of the electromagnetic vibrator and extend the service life of the electromagnetic vibrator.

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

[0039] 3. The present invention uses an alarm light and a touch display to promptly issue an over-threshold alarm when the electromagnetic vibrator is running, and manually intervenes by touch to keep the electromagnetic vibrator running with a constant amplitude, further improving the safety and reliability of the electromagnetic vibrator's operation. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0042] Figure 3 It is a structural schematic diagram of the acceleration detection board of the present invention;

[0043] Figure 4 The figure is a flow chart of 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 iron core; 162, rear iron core; 163, coil;

[0045] 200, driving device; 210, acceleration sensor; 220, acceleration detection board; 230, vibrator driving board; 240, host computer; 241, touch display; 250, warning light; 260, housing. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

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

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

[0049] The electromagnetic vibrator 100 is a device that can evenly, continuously and timely deliver bulk, granular and powdery materials to a receiving device, and 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 body 110, a mounting plate 120, a spring 130, a cover plate 140, a casting 150, a vibration assembly 160, and the like.

[0051] Among them, the trough body 110 and the mounting plate 120 are fixed by bolts, one end of the spring piece 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, and a vibration component 160 is arranged 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 trough body 110 to vibrate.

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

[0053] The coil 163 is electrically connected to the vibrator driving board 230, and is controlled by a periodic driving signal emitted by the vibrator driving board 230. When the power is on, the coil 163 generates a magnetic field, and the iron core is displaced under the action of the magnetic field, pulling the spring 130 to deform, thereby moving the slot body 110. When the power is off, the magnetic field force disappears, the spring 130 recovers, and the slot body 110 moves in the opposite direction, completing a periodic motion. Continuous drive allows the vibrator to work.

[0054] When the electromagnetic vibrator 100 is working, it is affected by the weight and the stiffness of the spring 130 . The vibration amplitude and frequency of the electromagnetic vibrator 100 may change due to the aging of the spring 130 and the change of the material in the tank 110 . Therefore, when used for a long time, the amplitude of the electromagnetic vibrator 100 cannot be kept constant and needs to be adjusted.

[0055] The acceleration sensor 210 is installed on the tank body 110 of the electromagnetic vibrator 100 to collect vibration acceleration data of the tank body 110 in working state. When the electromagnetic vibrator 100 is working, the vibration direction, as shown in the figure, is the main direction of material advancement in the Y direction. The material advances by virtue of the vibration in the Z direction and the slight downward inclination of the hopper. Excessive vibration will cause the material to be discharged too quickly, resulting in low color sorting accuracy. Excessive vibration will affect the color sorting output; the vibration in the X direction will cause the material to move left and right.

[0056] In many tests and experiments, it was found that the vibration in the X and Y directions is not large, so the vibration parameters in the Z direction can be mainly detected. The parameters in the Z direction are the key parameters to measure whether the entire electromagnetic vibrator meets the standards.

[0057] In view of this feature, when the electromagnetic vibrator 100 is detected using the acceleration sensor 210, the acceleration sensor 210 can be installed on the XZ surface or YZ surface side panel of the slot body 110 to mainly collect the vibration amplitude changes generated by the slot body 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 acceleration sensors 210 may be used as a group, and the two acceleration sensors 210 may serve as backup for each other. When one of the acceleration sensors 210 fails to work, the other acceleration sensor 210 may operate normally according to the value used by the other acceleration sensor 210 .

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

[0060] The acceleration detection board 220 is installed in the housing 260 of the driving device 200 or on the 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, and the FPGA chip is connected to an IO interface, which is connected to the acceleration sensor 210 through the IO interface to obtain vibration acceleration data.

[0062] The acceleration sensor 210 needs to be configured before vibration data collection can be carried out. The signals that the acceleration sensor 210 needs to configure mainly include sampling clock, chip select and control signal; the sampling clock can be determined by the system clock of the driving device 200; the chip select signal determines whether the acceleration sensor 210 is working, and the control signal determines the working mode of the acceleration sensor 210. After the FPGA chip receives the start sampling command issued by the user, the chip select signal drops to a low level and is not set to a high level until the user stops sampling; the sampling clock follows the system clock setting; the control signal is determined according to the specifications of the acceleration sensor 210.

[0063] The DC-DC chip is mainly used to divide the connected V DC power supply to provide different working voltages. As shown in the figure, the power supply of the acceleration sensor 210 is obtained through the FPGA processing board. Only a smaller chip can be selected on the vibration acceleration sensor 210 to obtain the 3.3V power supply voltage required by all components of the sensor, without the need to lay out a large area of ​​DC-DC conversion circuits. The 2.5V voltage power supply of the JTAG interface VCCAUX is also obtained through the DC-DC chip. The FPGA chip core working voltage VCCINT uses 1.2V and also comes from the DC-DC chip. It is connected to the host computer 240 using the RS bus, and the data is exchanged through the host computer 240 touch display 241.

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

[0065] Communication can use RS bus, which is a half-duplex communication method. It is necessary to add a driver to assist the bus in transmitting data, thereby increasing data transmission efficiency. The driving circuit converts and drives the interface signal corresponding to RS, thereby realizing communication between the touch display 241 or the host computer 240 and the board. RJ is a communication interface, which uses an RJ connector and has good compatibility; the JTAG interface is used for FPGA chip debugging. Through the JTAG interface, the timing relationship of each signal in the FPGA chip can be continuously checked to determine whether the status of each signal meets the requirements, and continuously debug and improve the working status of the FPGA processing board.

[0066] The host computer 240 automatically controls the vibrator driving board 230 according to the abnormal situation of the amplitude value of the electromagnetic vibrator 100, and adjusts the provided periodic driving signal to achieve a 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. The touch display 241 can be used to manually touch and intervene in the voltage and / or frequency adjustment of the periodic drive signal.

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

[0069] like Figure 4 As shown, the present invention also discloses a method for realizing 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 on the slot body 110 of the electromagnetic vibrator 100. The acceleration sensor 210 collects vibration acceleration data of the slot body 110 in a working state.

[0071] By installing the acceleration sensor 210 in the slot body 110 of the electromagnetic vibrator 100 , the vibration amplitude change of the electromagnetic vibrator 100 can be collected, so that the abnormal vibration of the electromagnetic vibrator 100 can be discovered.

[0072] The electromagnetic vibrator 100 uses the principle of near resonance. The driving frequency during operation needs to be close to the mechanical frequency of the electromagnetic vibrator 100. After long-term use, the electromagnetic vibrator 100 is affected by the weight and the stiffness of the spring 130. Due to the aging of the spring 130 and the change of the material in the slot 110, the driving frequency will change, causing the driving frequency and the resonance frequency to shift, causing the vibration amplitude of the electromagnetic vibrator 100 to change. These changes can be reflected in 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] A data line is connected between the acceleration sensor 210 and the acceleration detection board 220 for transmitting data. After the acceleration detection board 220 obtains the data, it 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 the vibration drive board, and the vibration drive board is connected to provide a periodic drive signal to enable the coil 163 to generate a periodically changing magnetic field.

[0075] S3. The host computer 240 determines the abnormality of the amplitude of the electromagnetic vibrator based on the processed acceleration data, and automatically adjusts the voltage and / or frequency of the periodic drive signal to keep the electromagnetic vibrator 100 running with a constant amplitude.

[0076] The host computer 240 can determine the abnormal operation of the acceleration sensor 210 based on the acquired vibration acceleration data, and can automatically adjust the voltage and / or frequency of the periodic drive signal to keep the electromagnetic vibrator 100 running with a constant amplitude, specifically including:

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

[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 host computer 240 can control the output of the vibration drive board to lower the voltage of the periodic drive signal and reduce the vibration amplitude of the electromagnetic vibrator 100 until the acceleration value is equal to 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 is equal to the target value.

[0080] Furthermore, the frequency of the periodic driving signal output by the vibration driving plate may be controlled by the host computer 240 to maintain the electromagnetic vibrator 100 running with a constant amplitude.

[0081] When the electromagnetic vibrator 100 is working, the driving frequency must be close to the mechanical frequency of the electromagnetic vibrator 100, and the vibration amplitude is the largest. After long-term use, when the driving frequency and the resonance frequency shift, the driving frequency of the electromagnetic vibrator 100 is less than or greater than the resonance frequency point, and the amplitude will become smaller. The purpose of frequency conversion control is to make the driving frequency always close to the resonance frequency of the vibrator.

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

[0083] When the driving frequency is greater than the resonance frequency, the driving frequency is lowered until the acceleration value is equal to the target value; when the driving frequency is less than the resonance frequency, the driving frequency is increased until the acceleration value is equal to the target value.

[0084] Thereby, 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 driving signal.

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

[0087] Adjust the driving frequency 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 remains at the target value. Adjust the driving frequency 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 is equal to the target value.

[0088] Through the above-mentioned adjustment methods, the frequency and voltage of the periodic driving signal can be automatically adjusted by the host computer 240 so that the monitored acceleration value is equal to the target value, thereby keeping the vibration amplitude of the electromagnetic vibrator 100 constant.

[0089] Furthermore, when the vibration amplitude of the electromagnetic vibrator 100 collected by the acceleration sensor 210 is too large and exceeds the set threshold, the touch display 241 displays that the acceleration waveform shows obvious abnormality, and it can be judged that an abnormal situation has occurred during the operation of the electromagnetic vibrator 100, such as excessive load, jamming, etc. At this time, the alarm light 250 will emit an audible and visual alarm, and the person can intervene in the operation of the electromagnetic vibrator 100 through the touch display 241, manually adjust the frequency and voltage of the period drive signal, or shut down to troubleshoot, so as to keep the electromagnetic vibrator 100 running with a constant amplitude.

[0090] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0091] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A driving device for achieving constant amplitude operation of an electromagnetic vibrator, characterized in that: include: An acceleration sensor (210) is mounted on the slot (110) of the electromagnetic vibrator (100) to collect vibration acceleration data of the electromagnetic vibrator (100); The acceleration detection board (220) is electrically connected to the acceleration sensor (210), collects and analyzes vibration acceleration data, and obtains the amplitude value of the electromagnetic vibrator (100); A vibrator driving board (230) is electrically connected to the acceleration sensor (210) and the host computer (240) to provide a periodic driving signal for the coil (163) of the electromagnetic vibrator (100); The upper computer (240) automatically adjusts the voltage and / or frequency of the periodic drive signal of the vibrator driving plate (230) according to the abnormal situation of the amplitude value of the electromagnetic vibrator (100), so as to realize the operation of the electromagnetic vibrator (100) with constant amplitude.

2. A driving device for achieving constant amplitude operation of an electromagnetic vibrator according to claim 1, characterized in that: Also includes: The alarm light (250) is used to give an audible and visual alarm when the amplitude value of the electromagnetic vibrator (100) exceeds a threshold value.

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

4. A driving device for achieving constant amplitude operation of an electromagnetic vibrator according to claim 1, characterized in that: The electromagnetic vibrator (100) comprises: a tank body (110), a mounting plate (120), a spring sheet (130), a cover plate (140), a casting (150) and a vibration assembly (160), wherein: The trough body (110) and the mounting plate (120) are fixed by bolts; one end of the spring sheet (130) is fixed on the mounting plate (120) and the other end is fixedly mounted on the casting (150); a cavity (151) is provided in the casting (150); a vibration component (160) is arranged in the cavity (151); the vibration component (160) connects the casting (150) and the mounting plate (120); and the vibration generated by the vibration component (160) drives the mounting plate (120) and the trough body (110) to vibrate.

5. A driving device for achieving constant amplitude operation of an electromagnetic vibrator according to claim 4, characterized in that: The vibration component (160) comprises a front iron core (161), a rear iron core (162) and a coil (163), wherein: The front iron core (161) is fixed on the mounting plate (120), the rear iron 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 arranged in the cavity (151) of the casting (150), the coil (163) is hollow, and the front iron core (161) and the rear iron core (162) are placed therein, one end of the coil (163) is in the casting (150), and the other end is against the cover plate (140), and the coil (163) is electrically connected to the vibrator driving plate (230).

6. A method for realizing constant amplitude operation of an electromagnetic vibrator using the driving device (200) according to any one of claims 1 to 5, characterized in that: The method comprises: S1. An acceleration sensor (210) is installed on a tank body (110) of an electromagnetic vibrator (100), wherein the acceleration sensor (210) collects vibration acceleration data of the tank body (110) in a working state; S2, sending the vibration acceleration data to the acceleration detection board (220), using the acceleration detection board (220) to analyze and process the vibration acceleration data, and sending it to the host computer (240); S3. The host computer (240) determines the abnormality of the amplitude of the electromagnetic vibrator based on the processed acceleration data, and automatically adjusts the voltage and / or frequency of the periodic drive signal to keep the electromagnetic vibrator (100) running with a constant amplitude.

7. The method for achieving constant amplitude operation of an electromagnetic vibrator according to claim 6, characterized in that: The method further comprises: The host computer (240) generates acceleration waveform data based on the processed acceleration data, displays the acceleration waveform by touching the touch display (241), and adjusts the voltage and / or frequency of the periodic drive signal through manual touch intervention based on the displayed acceleration waveform and the alarm signal to keep the electromagnetic vibrator (100) running with a constant amplitude.

8. The method for achieving constant amplitude operation of an electromagnetic vibrator according to claim 6, characterized in that: In S4, the voltage of the periodic driving signal is adjusted to maintain the electromagnetic vibrator (100) running with a constant amplitude, including comparing the acceleration value of the electromagnetic vibrator (100) with a 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 is equal to 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 is equal to the target value.

9. The method for achieving constant amplitude operation of an electromagnetic vibrator according to claim 6, characterized in that: In S4, the frequency of the periodic driving signal is adjusted to maintain the electromagnetic vibrator (100) running with a constant amplitude, including comparing the driving frequency with the resonant frequency of the vibrator: When the driving frequency is greater than the resonance frequency, the driving frequency is lowered until the acceleration value is equal to the target value; When the driving frequency is less than the resonance frequency, the driving frequency is increased until the acceleration value is equal to the target value.

10. The method for achieving constant amplitude operation of an electromagnetic vibrator according to claim 6, characterized in that: The step S4 uses the frequency and voltage of the periodic driving signal to adjust to maintain the electromagnetic vibrator (100) with a constant amplitude, including: Adjust the driving frequency to be close to the resonance frequency. When the acceleration value is less than the target value, increase the voltage of the periodic driving signal until the acceleration value is equal to the target value. The driving frequency is adjusted to be close to the resonance frequency. When the acceleration value is greater than the target value, the voltage of the periodic driving signal is lowered until the acceleration value is equal to the target value.

Images