Adjustable excitation control system

Abstract

The utility model discloses an adjustable excitation control system, which comprises a singlechip, an upper computer, an excitation power supply, a driving module, a vibration table and a sensor, the sensor is fixed on the vibration table, the output end of the sensor is electrically connected with the input end of the upper computer, the output end of the upper computer is electrically connected with the first input end of the single-chip microcomputer and the input end of the driving module, and the first output end of the single-chip microcomputer is electrically connected with the first input end of the excitation power source. The output end of the excitation power supply and the output end of the driving module are electrically connected with the vibration table; the single chip microcomputer controls the excitation power supply to output variable excitation voltage so as to change the vibration condition of the vibration table; the sensor detects the changed acceleration of the vibration table in the vibration process and sends a changed acceleration signal to the upper computer; and the upper computer controls the driving module to output correspondingly changed moving coil voltage according to the changed acceleration signal, so that the acceleration of the vibration table is kept unchanged. By using the device, the adjusting precision of the moving coil voltage is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration tables, in particular to an adjustable excitation control system. Background Art

[0002] The vibration table is an environment that simulates the various forces encountered by the product during transportation and use. It is used to determine whether the simulated product has the ability to withstand environmental vibration. It is suitable for various industries such as electronics, electromechanics, and transportation vehicles.

[0003] Existing vibration tables are divided into permanent magnet type and excitation type. In the excitation type vibration table, the current of the excitation coil determines the magnetic field strength. Usually, the structure of the coil cannot be changed after winding, that is, the coil resistance remains unchanged, making the excitation voltage of the vibration table unadjustable. However, for occasions where the acceleration accuracy of the vibration table is relatively high, the excitation voltage needs to be adjusted to improve the accuracy of adjusting the moving coil in the vibration table. Utility Model Content

[0004] The utility model provides an adjustable excitation control system, which realizes the adjustment of the excitation voltage through closed-loop control, thereby improving the adjustment accuracy of the moving coil voltage, and has a simple structure and low cost.

[0005] The utility model provides an adjustable excitation control system, including a single chip microcomputer, a host computer, an excitation power supply, a drive module, a vibration table and a sensor;

[0006] The sensor is fixed on the vibration table, the output end of the sensor is electrically connected to the input end of the host computer, the output end of the host computer is electrically connected to the first input end of the single-chip microcomputer and the input end of the driving module respectively, the first output end of the single-chip microcomputer is electrically connected to the first input end of the excitation power supply, and the output end of the excitation power supply and the output end of the driving module are both electrically connected to the vibration table;

[0007] The excitation power supply generates an excitation voltage to the vibration table; the driving module generates a dynamic coil voltage to the vibration table; the vibration table receives the excitation voltage and the dynamic coil voltage, and vibrates according to the excitation voltage and the dynamic coil voltage;

[0008] The single chip microcomputer controls the excitation power supply to output a variable excitation voltage to change the vibration of the vibration table; the sensor detects the changing acceleration during the vibration of the vibration table and sends the changing acceleration signal to the host computer; the host computer controls the drive module to output the corresponding changing dynamic coil voltage according to the changing acceleration signal to keep the acceleration of the vibration table unchanged.

[0009] Optionally, the control system further includes a monitoring module;

[0010] The first input end of the monitoring module is electrically connected between the excitation power supply and the vibration table, the second input end of the monitoring module is electrically connected between the driving module and the vibration table, and the output end of the monitoring module is electrically connected to the second input end of the single chip microcomputer;

[0011] The monitoring module monitors the excitation voltage and the moving coil voltage, and sends the excitation voltage and the moving coil voltage to the single chip microcomputer.

[0012] Optionally, the single chip microcomputer includes a display unit; the display unit displays the excitation voltage and the moving coil voltage.

[0013] Optionally, the single chip microcomputer further includes a voltage regulating unit; the voltage regulating unit adjusts the excitation voltage and the moving coil voltage according to the voltage displayed by the display unit so as to keep the acceleration of the vibration table constant.

[0014] Optionally, the host computer also controls the single-chip microcomputer so that the single-chip microcomputer controls the excitation power supply to output a variable excitation voltage.

[0015] Optionally, the control system further includes a power amplifier module;

[0016] The power amplifier module is electrically connected between the driving module and the vibration table. The power amplifier module amplifies the dynamic coil voltage output by the driving module and sends the amplified dynamic coil voltage to the vibration table.

[0017] Optionally, the control system further includes a protection module;

[0018] The output end of the protection module is electrically connected to the third input end of the single-chip microcomputer, the second input end of the excitation power supply and the input end of the power amplifier module respectively. When the excitation voltage and the moving coil voltage received by the single-chip microcomputer are abnormal, the path between the protection module and the excitation power supply, and between the protection module and the power amplifier module are cut off.

[0019] Optionally, the control system further includes a rectifier and voltage reduction module;

[0020] The rectifier and step-down module is electrically connected between the mains power supply and the protection module, and converts and steps down the AC voltage generated by the mains power supply to provide a DC voltage to the protection module.

[0021] Optionally, the rectifier and buck module includes a voltage conversion unit and a buck unit; the voltage conversion unit is electrically connected to the buck unit, the input end of the voltage conversion unit is electrically connected to the output end of the mains power supply, and the output end of the buck unit is electrically connected to the input end of the protection module;

[0022] The voltage conversion unit converts the AC voltage into a DC voltage; the step-down unit converts the DC voltage into the working voltage of the protection module.

[0023] Optionally, the sensor includes an accelerometer.

[0024] The technical solution of the utility model controls the excitation power supply to output an adjustable excitation voltage through a single-chip microcomputer, so that the acceleration of the vibration table changes accordingly, and the sensor sends the changing acceleration signal to the host computer. After the host computer receives the changing acceleration signal, it controls the drive module to output the corresponding changing dynamic coil voltage to ensure that the acceleration of the vibration table remains constant. Using the above structure, the excitation voltage can be adjusted under the premise of ensuring that the acceleration of the vibration table remains unchanged, while increasing the output range of the drive module and improving the adjustable accuracy of the drive module.

[0025] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of the structure of an adjustable excitation control system provided by an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the structure of a second adjustable excitation control system provided by an embodiment of the utility model;

[0029] Figure 3 A schematic diagram of the structure of a third adjustable excitation control system provided by an embodiment of the utility model;

[0030] Figure 4 A schematic diagram of the structure of a fourth adjustable excitation control system provided by an embodiment of the utility model;

[0031] Figure 5 A schematic structural diagram of a fifth adjustable excitation control system provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model 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 utility model described herein can be implemented in an order other than those illustrated or described herein.

[0034] In one embodiment, Figure 1 A schematic diagram of the structure of an adjustable excitation control system provided by an embodiment of the utility model is shown as follows: Figure 1 As shown, the control system includes a single-chip computer 1, a host computer 2, an excitation power supply 3, a drive module 4, a vibration table 5 and a sensor 6; the sensor 6 is fixed on the vibration table 5, the output end of the sensor 6 is electrically connected to the input end of the host computer 2, the output end of the host computer 2 is electrically connected to the first input end of the single-chip computer 1 and the input end of the drive module 4 respectively, the first output end of the single-chip computer 1 is electrically connected to the first input end of the excitation power supply 3, the output end of the excitation power supply 3 and the output end of the drive module 4 are both electrically connected to the vibration table 5; the excitation power supply 3 generates an excitation voltage To the vibration table 5; the driving module 4 generates a dynamic coil voltage to the vibration table 5; the vibration table 5 receives the excitation voltage and the dynamic coil voltage, and vibrates according to the excitation voltage and the dynamic coil voltage; the single chip computer 1 controls the excitation power supply 3 to output a variable excitation voltage to change the vibration condition of the vibration table 5; the sensor 6 detects the changing acceleration of the vibration table 5 during the vibration process, and sends the changing acceleration signal to the host computer 2; the host computer 2 controls the driving module 4 to output the corresponding changing dynamic coil voltage according to the changing acceleration signal, so that the acceleration of the vibration table 5 remains unchanged.

[0035] Among them, the single-chip computer 1 is an integrated circuit chip of an embedded microcontroller. Exemplarily, the model of the single-chip computer 1 may include STM32F103RCT6. The host computer 2 may be a computer or other equipment that can directly issue an operation command. In this embodiment, the host computer 2 may receive the acceleration signal of the vibration table 5 detected by the sensor 6, and control the dynamic coil voltage output by the drive module 4 according to the acceleration signal. The excitation power supply 3 may output the excitation voltage to the vibration table 5, wherein the excitation voltage is a DC voltage. The drive module 4 may output the dynamic coil voltage to the vibration table 5, wherein the dynamic coil voltage is an AC voltage. The vibration table 5 is mainly used to simulate the vibration and influence experienced by the product during transportation, storage and use in the laboratory, so as to identify whether the product can tolerate environmental vibration. The sensor 6 is a device that can sense, measure and convert various signals such as physical quantities or chemical quantities, and can convert the detected signal into an electrical signal or a digital signal and send it to the host computer 2. In this embodiment, the sensor 6 may be an acceleration sensor, which is mainly used to detect the acceleration of the vibration table 5.

[0036] Specifically, when the vibration test is performed on the vibration table 5, the excitation power supply 3 will output the excitation voltage to the excitation coil of the vibration table 5 in the power supply state, and the driving module 4 can output the dynamic coil voltage to the dynamic coil of the vibration table 5. After the vibration table 5 receives the excitation voltage and the dynamic coil voltage, it will vibrate according to the excitation voltage and the dynamic coil voltage to generate a certain magnitude of acceleration. The sensor 6 located on the vibration table 5 can detect the acceleration of the vibration table 5 and send the acceleration signal to the host computer 2. In addition, the first output terminal of the single-chip microcomputer 1 is electrically connected to the first input terminal of the excitation power supply 3, so the single-chip microcomputer 1 can control the excitation voltage output by the excitation power supply 3 to change, for example, the excitation voltage can be reduced. When the excitation voltage changes, the changed excitation voltage is sent to the excitation coil of the vibration table 5, which will change the vibration of the vibration table 5, thereby changing the acceleration of the vibration table 5 detected by the sensor 6 during vibration. The changed acceleration signal will be sent to the host computer 2. After receiving the changed acceleration signal, the host computer 2 will control the drive module 4 to output the corresponding changed dynamic coil voltage to ensure that the acceleration of the vibration table 5 remains unchanged. If the acceleration signal decreases, the dynamic coil voltage output by the drive module 4 is increased, thereby ensuring that the total voltage finally input to the vibration table 5 remains unchanged, so that the vibration table 5 always vibrates at a constant acceleration. The excitation voltage can be adjusted while ensuring that the acceleration of the vibration table 5 remains unchanged. At the same time, when the dynamic coil voltage increases, it indicates that the output range of the driving module 4 increases. For example, when the excitation voltage is not adjusted, the dynamic coil voltage output by the driving module 4 is 30VRMS. After the excitation voltage is reduced, the dynamic coil voltage needs to be increased. At this time, the output dynamic coil voltage can be 60VRMS, thereby improving the adjustable accuracy of the driving module 4.

[0037] The technical solution of the embodiment of the utility model is to control the excitation power supply to output an adjustable excitation voltage through a single chip microcomputer, so that the acceleration of the vibration table changes accordingly, and the sensor sends the changing acceleration signal to the host computer. After the host computer receives the changing acceleration signal, it will control the drive module to output the corresponding changing dynamic coil voltage to ensure that the acceleration of the vibration table is constant. Using the above structure, the excitation voltage can be adjusted under the premise of ensuring that the acceleration of the vibration table remains unchanged, while increasing the output range of the drive module and improving the adjustable accuracy of the drive module.

[0038] In an optional embodiment, continue to refer to Figure 1 The host computer 2 also controls the single chip microcomputer 1 so that the single chip microcomputer 1 controls the excitation power supply 3 to output a variable excitation voltage.

[0039] In another alternative embodiment, Figure 2 The schematic diagram of the structure of the second adjustable excitation control system provided by the embodiment of the utility model is shown in FIG. Figure 2 As shown, the control system also includes a monitoring module 7; the first input end of the monitoring module 7 is electrically connected between the excitation power supply 3 and the vibration table 5, the second input end of the monitoring module 7 is electrically connected between the driving module 4 and the vibration table 5, and the output end of the monitoring module 7 is electrically connected to the second input end of the single-chip microcomputer 1; the monitoring module 7 monitors the excitation voltage and the moving coil voltage, and sends the excitation voltage and the moving coil voltage to the single-chip microcomputer 1.

[0040] Optional, continue to refer to Figure 2 The single chip microcomputer includes a display unit 11; the display unit 11 displays the excitation voltage and the moving coil voltage.

[0041] Optional, continue to refer to Figure 2 The single chip microcomputer further includes a voltage regulating unit 12; the voltage regulating unit 12 adjusts the excitation voltage and the moving coil voltage according to the voltage displayed by the display unit 11, so as to keep the acceleration of the vibration table 5 unchanged.

[0042] The monitoring module 7 is used to monitor the excitation voltage output by the excitation power supply 3 and the dynamic coil voltage output by the driving module 4, and send the monitored excitation voltage and dynamic coil voltage to the single chip computer 1. The display unit 11 is used to display the excitation voltage and the dynamic coil voltage. The voltage regulating unit 12 is used to adjust the excitation voltage and the dynamic coil voltage to increase or decrease the excitation voltage and the dynamic coil voltage. The voltage regulating unit 12 can be adjusted in a manner including but not limited to adjustment by buttons or knobs.

[0043] Specifically, in the process that the excitation power supply 3 outputs the excitation voltage to the vibration table 5, and the driving module 4 outputs the dynamic coil voltage to the vibration table 5, it is necessary to monitor the excitation voltage and the dynamic coil voltage in real time, so a monitoring module 7 is set to monitor the excitation voltage and the dynamic coil voltage, and send the monitored excitation voltage and the dynamic coil voltage to the single chip microcomputer 1, and the single chip microcomputer 1 will display the received excitation voltage and the dynamic coil voltage on the display unit 11 respectively, and adjust the excitation voltage and the dynamic coil voltage through the voltage adjustment unit 12 according to the voltage displayed by the display unit 11. In the adjustment process, the excitation voltage can be adjusted first, for example, the excitation voltage can be reduced, and at the same time, in order to ensure that the acceleration of the vibration table 5 remains unchanged, the dynamic coil voltage can be increased, so the dynamic coil voltage can be adjusted to be larger, thereby ensuring that the acceleration of the vibration table 5 remains unchanged, and at the same time, the adjustable accuracy of the dynamic coil voltage is improved.

[0044] In another alternative embodiment, Figure 3 The schematic diagram of the structure of the third adjustable excitation control system provided by the embodiment of the utility model is shown in FIG. Figure 3 As shown, the control system also includes a power amplifier module 8 ; the power amplifier module 8 is electrically connected between the driving module 4 and the vibration table 5 , the power amplifier module 8 amplifies the dynamic coil voltage output by the driving module 4 , and sends the amplified dynamic coil voltage to the vibration table 5 .

[0045] The power amplifier module 8 is used to amplify the dynamic coil voltage output by the driving module 4, and send the amplified dynamic coil voltage to the vibration table 5. In this embodiment, the dynamic coil voltage output by the upper computer 2 to control the driving module 4 is usually small, while the dynamic coil voltage required by the vibration table 5 is large, so it is necessary to set the power amplifier module 8 to amplify the dynamic coil voltage, such as amplifying the 1V dynamic coil voltage to 30V, and sending the 30V dynamic coil voltage to the vibrator 5 to provide a basis for the vibration of the vibration table 5.

[0046] In another alternative embodiment, Figure 4 The schematic diagram of the structure of the fourth adjustable excitation control system provided by the embodiment of the utility model is shown in FIG. Figure 4 As shown, the control system also includes a protection module 9; the output end of the protection module 9 is electrically connected to the third input end of the single-chip computer 1, the second input end of the excitation power supply 3 and the input end of the power amplifier module 8 respectively. When the excitation voltage and the moving coil voltage received by the single-chip computer 1 are abnormal, the path between the protection module 9 and the excitation power supply 3, and the path between the protection module 9 and the power amplifier module 8 are cut off.

[0047] Among them, the protection module 9 is used to protect the excitation power supply 3 and the power amplifier module 8. In this embodiment, the single chip computer 1 can receive the excitation voltage and the moving coil voltage monitored by the monitoring module 7. When the excitation voltage and the moving coil voltage are abnormal, it indicates that the control system may fail at this time, and the vibration table 5 cannot vibrate at a constant acceleration. Then, the single chip computer 1 will control the path between the protection module 9 and the excitation power supply 3, and the path between the protection module 9 and the power amplifier module 8 to be disconnected, so that the excitation power supply 3 and the power amplifier module 8 will not continue to output the excitation voltage and the moving coil voltage to the vibration table 5.

[0048] In another alternative embodiment, Figure 5 The schematic diagram of the structure of the fifth adjustable excitation control system provided by the embodiment of the utility model is shown in FIG. Figure 5 As shown, the control system also includes a rectifier and buck module 10 ; the rectifier and buck module 10 is electrically connected between the mains power supply 110 and the protection module 9 , converts and bucks the AC voltage generated by the mains power supply 110 to provide a DC voltage to the protection module 9 .

[0049] Optional, continue to refer to Figure 5 The rectifier and buck module 10 includes a voltage conversion unit 101 and a buck unit 102; the voltage conversion unit 101 is electrically connected to the buck unit 102, the input end of the voltage conversion unit 101 is electrically connected to the output end of the AC power supply 110, and the output end of the buck unit 102 is electrically connected to the input end of the protection module 9; the voltage conversion unit 101 converts the AC voltage into a DC voltage; the buck unit 102 converts the DC voltage into the working voltage of the protection module 9.

[0050] Among them, the rectifier and step-down module 10 includes a voltage conversion unit 101 and a step-down unit 102. The voltage conversion unit 101 is used to convert the AC voltage of the mains power supply 110 into a DC voltage, and the step-down unit 102 is used to convert the DC voltage into the working voltage of the protection module 9 to provide the required working DC voltage to the protection module 9.

[0051] Specifically, the AC power supply 110 can provide voltage to the control system to enable the control system to work, but because the AC power supply 110 generates an AC voltage with a relatively large voltage, and the control system requires a DC voltage with a relatively small voltage, a voltage conversion unit 101 and a step-down unit 102 are set so that the voltage conversion unit 101 can convert the AC voltage generated by the AC power supply 110 into a DC voltage, and the DC voltage is converted into the working voltage of the protection module 9 through the step-down unit 102, thereby ensuring that the control system can work normally.

[0052] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0053] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An adjustable excitation control system, characterized in that: Including single chip microcomputer, host computer, excitation power supply, drive module, vibration table and sensor; The sensor is fixed on the vibration table, the output end of the sensor is electrically connected to the input end of the host computer, the output end of the host computer is electrically connected to the first input end of the single-chip microcomputer and the input end of the driving module respectively, the first output end of the single-chip microcomputer is electrically connected to the first input end of the excitation power supply, and the output end of the excitation power supply and the output end of the driving module are both electrically connected to the vibration table; The excitation power supply generates an excitation voltage to the vibration table; the driving module generates a dynamic coil voltage to the vibration table; the vibration table receives the excitation voltage and the dynamic coil voltage, and vibrates according to the excitation voltage and the dynamic coil voltage; The single chip microcomputer controls the excitation power supply to output the variable excitation voltage to change the vibration condition of the vibration table; the sensor detects the changing acceleration during the vibration of the vibration table and sends the changing acceleration signal to the host computer; the host computer controls the drive module to output the corresponding changing dynamic coil voltage according to the changing acceleration signal to keep the acceleration of the vibration table unchanged.

2. The control system according to claim 1, characterized in that: It also includes a monitoring module; The first input end of the monitoring module is electrically connected between the excitation power supply and the vibration table, the second input end of the monitoring module is electrically connected between the driving module and the vibration table, and the output end of the monitoring module is electrically connected to the second input end of the single-chip microcomputer; The monitoring module monitors the excitation voltage and the moving coil voltage, and sends the excitation voltage and the moving coil voltage to the single chip microcomputer.

3. The control system according to claim 2, characterized in that: The single chip microcomputer comprises a display unit; the display unit displays the excitation voltage and the moving coil voltage.

4. The control system according to claim 3, characterized in that: The single chip microcomputer further comprises a voltage regulating unit; the voltage regulating unit regulates the excitation voltage and the moving coil voltage according to the voltage displayed by the display unit so as to keep the acceleration of the vibration table unchanged.

5. The control system according to claim 1, characterized in that: The host computer also controls the single chip microcomputer so that the single chip microcomputer controls the excitation power supply to output the variable excitation voltage.

6. The control system according to claim 1, characterized in that: Also includes amplifier module; The power amplifier module is electrically connected between the driving module and the vibration table. The power amplifier module amplifies the dynamic coil voltage output by the driving module and sends the amplified dynamic coil voltage to the vibration table.

7. The control system according to claim 6, characterized in that: Also includes protection modules; The output end of the protection module is electrically connected to the third input end of the single-chip microcomputer, the second input end of the excitation power supply and the input end of the power amplifier module respectively. When the excitation voltage and the moving coil voltage received by the single-chip microcomputer are abnormal, the path between the protection module and the excitation power supply, and the path between the protection module and the power amplifier module are cut off.

8. The control system according to claim 7, characterized in that: It also includes a rectifier and step-down module; The rectifier and voltage-reducing module is electrically connected between the mains power supply and the protection module, and converts and reduces the AC voltage generated by the mains power supply to provide a DC voltage to the protection module.

9. The control system according to claim 8, characterized in that: The rectifier and buck module includes a voltage conversion unit and a buck unit; the voltage conversion unit is electrically connected to the buck unit, the input end of the voltage conversion unit is electrically connected to the output end of the mains power supply, and the output end of the buck unit is electrically connected to the input end of the protection module; The voltage conversion unit converts the AC voltage into the DC voltage; and the voltage reduction unit converts the DC voltage into the operating voltage of the protection module.

10. The control system according to claim 1, characterized in that: The sensor includes an acceleration sensor.

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