CN112254911B - Prestress controllable vibration excitation method and device - Google Patents
Prestress controllable vibration excitation method and device Download PDFInfo
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- CN112254911B CN112254911B CN202011093721.3A CN202011093721A CN112254911B CN 112254911 B CN112254911 B CN 112254911B CN 202011093721 A CN202011093721 A CN 202011093721A CN 112254911 B CN112254911 B CN 112254911B
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- 239000002184 metal Substances 0.000 claims description 60
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/08—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with magnetostriction
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
- H02N2/001—Driving devices, e.g. vibrators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
- H02N2/0075—Electrical details, e.g. drive or control circuits or methods
Abstract
The invention discloses a prestress controllable vibration excitation method and device, and belongs to the technical field of vibration measurement. The invention uses the mode of combining the piezoelectric stack with the T-shaped beam, the piezoelectric stack generates a prestress value through the lever principle, and the prestress value is accurately regulated and controlled in a closed-loop mode, so that the problems of loading and accurate control of prestress when the giant magnetostrictive rod generates vibration waveform excitation are solved; an alternating magnetic field and a direct current bias magnetic field are respectively applied to the giant magnetostrictive material rod in a double-layer coil mode, namely, the giant magnetostrictive rod accurately controlled by prestress generates sine waveform-changed vibration excitation with balanced load capacity and excellent waveform quality, a vibration table is pushed, and high-quality vibration waveforms with balanced load capacity are generated and used for providing vibration excitation under various environments. The invention can be used not only in air, but also for vibration excitation of underwater environment.
Description
Technical Field
The invention relates to a prestress controllable vibration excitation method and device, and belongs to the technical field of vibration measurement.
Background
The vibration exciting device is the core of vibration measurement calibration, various vibration table generation values are generally used, a plurality of theoretical and technical research results exist, most of the results are focused on the generation of vibration values in air, the vibration exciting device is difficult to generate in various liquids such as underwater and the like, particularly in conductive liquid, and one of the difficulties is mainly reflected in the realization of a vibration exciting source. It relates to a plurality of difficulties of how to realize insulation, sealing, safety protection, etc.
Since the vibration exciting device taking giant magnetostriction as the core appears, the vibration exciting device provides technical possibility for people to solve the problems and can adapt to special environments such as high pressure water. However, when the giant magnetostrictive material works, a good expansion and contraction balanced waveform can be generated only under a certain prestress condition, and the generation and the regulation of the prestress are difficult, so that the application of the giant magnetostrictive material in many occasions is limited.
Disclosure of Invention
The vibration exciting device aims at solving the problems that in a vibration exciting device taking giant magnetostrictive expansion as an exciting principle, a balanced load capacity and a high-quality vibration waveform can be obtained only by carrying out prestress loading on a giant magnetostrictive rod body exciter, and the prestress load changes infrequently in the vibration process and is difficult to accurately regulate and control. The invention discloses a vibration excitation method with controllable prestress and a device thereof, which aim to solve the technical problems that: a piezoelectric stack is combined with a T-shaped beam mode to apply prestress with controllable magnitude to a giant magnetostrictive material rod, an alternating magnetic field and a direct current bias magnetic field are respectively applied to the giant magnetostrictive material rod in a double-layer coil mode to drive the giant magnetostrictive material rod to generate telescopic motion, and therefore high-quality vibration waveforms with balanced load capacity are generated and used for providing vibration excitation under various environments.
The invention is realized by the following technical scheme.
The invention discloses a prestress controllable vibration excitation method, which is characterized in that a piezoelectric stack is combined with a T-shaped beam mode, prestress with controllable magnitude is applied to a giant magnetostrictive material rod through a lever principle, the prestress value is accurately regulated and controlled in a closed loop mode, an alternating magnetic field and a direct current bias magnetic field are respectively applied to the giant magnetostrictive material rod in a double-layer coil mode, the giant magnetostrictive material rod is driven to generate telescopic motion, and therefore high-quality vibration waveforms with balanced load capacity are generated and are used for providing vibration excitation in various environments.
The invention discloses a prestress controllable vibration excitation device which mainly comprises a first support body, a second support body, a third support body, a giant magnetostrictive material rod, a first excitation coil, a second excitation coil, a first metal gasket, a second metal gasket, a third metal gasket, a load sensor, a vibration table top, an elastic beam, a flexible supporting rod, a piezoelectric stack, a first power amplifier, a second power amplifier, a third power amplifier, a first direct current signal source, a second direct current signal source, a sinusoidal signal generator, a low-pass filter, a dynamometer and an electronic computer.
The first supporting body is used for fixedly supporting the elastic beam; the second support body is used for fixedly supporting the piezoelectric stack; the third support body is used for fixedly supporting the giant magnetostrictive material rod.
The piezoelectric stack drives the flexible supporting rod through the second metal gasket by means of self expansion and contraction, so that the acting force on the elastic beam is regulated and controlled, and the prestress of the giant magnetostrictive material rod is controlled through the vibration table board, the load sensor and the first metal gasket.
The first metal gasket transmits the prestress transmitted by the load sensor to the giant magnetostrictive material rod in a balanced manner.
The second metal gasket and the third metal gasket play a role in protecting the piezoelectric stack and prevent the ceramic of the piezoelectric stack from being cracked.
The load sensor is used for measuring the prestress of the giant magnetostrictive material rod so as to facilitate quantitative closed-loop control; the low-pass filter is used for filtering alternating current components in signals obtained by the load sensor, only keeping direct current components and measuring prestress; the dynamometer is used for measuring prestress; the electronic computer is used for obtaining the prestress value and regulating and controlling the output value of the second direct current signal source according to the prestress value, so that the prestress value obtained by the measurement of the dynamometer is kept at a set target value; the third power amplifier is used for power driving of the piezoelectric stack to generate the set prestress.
The first direct current signal source is used for generating a required direct current signal; the first power amplifier is used for amplifying power of a signal generated by the first direct current signal source so as to effectively drive the second excitation coil and generate a direct current bias magnetic field required by the giant magnetostrictive material rod.
The sinusoidal signal generator is used for generating a required sinusoidal signal; the second power amplifier is used for amplifying the power of the signal generated by the sinusoidal signal generator so as to effectively drive the first magnet exciting coil to generate a required sinusoidal exciting magnetic field, thereby driving the telescopic motion of the giant magnetostrictive material rod to generate vibration excitation on the vibration table surface through the transmission of the first metal gasket and the load sensor.
Preferably, the sinusoidal signal generator is replaced by an arbitrary wave generator to generate square wave, triangular wave, step wave and other non-sinusoidal signal waveforms, so as to obtain a vibration exciting device with corresponding waveforms.
Preferably, the first support body, the second support body, the third support body, the giant magnetostrictive material rod, the first excitation coil, the second excitation coil, the first metal gasket, the second metal gasket, the third metal gasket, the load sensor, the vibration table, the elastic beam, the flexible support rod and the piezoelectric stack are placed into water after being insulated and sealed, so that the underwater dynamic strain excitation device is obtained.
The invention discloses an assembly and working method of a prestress controllable vibration exciting device, which comprises the following steps:
and the elastic beam and the vibration table top are fixedly installed together through threaded connection and are fixed on the first support body.
Mounting and fastening the second metal gasket, the third metal gasket and the piezoelectric stack on a second support body through the third metal gasket; meanwhile, the flexible support rod is flexibly connected with the elastic beam.
Installing and fastening a giant magnetostrictive material rod sleeved with the first excitation coil and the second excitation coil on a third support body; and is connected with the elastic beam sequentially through the first metal gasket, the load sensor and the vibration table board. And wired as shown.
Setting a prestress value through an electronic computer, regulating and controlling a direct current value output by a second direct current signal source, applying the prestress value to the piezoelectric stack through a third power amplifier, controlling the piezoelectric stack to stretch and contract to generate prestress, wherein the prestress is supported by a second support body and a third metal gasket and is applied to the giant magnetostrictive material rod through a second metal gasket, a flexible supporting rod, an elastic beam, a vibration table, a load sensor and a first metal gasket; and simultaneously, a prestress signal is obtained by measurement of the load sensor, the prestress signal is filtered by a low-pass filter, enters the dynamometer to obtain a measured value and is read by the electronic computer, the electronic computer compares the difference between the read prestress value measurement result and a target set value, and then readjusts the direct current value output by the second direct current signal source until the difference between the two is smaller than the appointed range, so that the prestress control iteration process is completed.
The first direct current signal source outputs a direct current signal, the direct current signal is transmitted to the first power amplifier for power amplification, and then the second excitation coil is driven to generate a direct current bias magnetic field required by the giant magnetostrictive material rod.
The sine signal generator outputs a sine signal; the vibration excitation waveform is transmitted to a second power amplifier for power amplification, then the first excitation coil is driven to generate a required sinusoidal excitation magnetic field, the giant magnetostrictive material rod is driven to generate telescopic motion, and a high-quality vibration excitation waveform with balanced load capacity is generated on the vibration table top through the transmission of the first metal gasket and the load sensor and is used for providing vibration excitation under various environments.
Has the advantages that:
1. the invention discloses a prestress controllable vibration excitation method and device, which use the working mode of a piezoelectric stack combined with a giant magnetostrictive rod, generate a prestress value by the piezoelectric stack through a lever principle, and accurately regulate and control the prestress value in a closed-loop mode, thereby solving the problems of prestress loading and accurate control when the giant magnetostrictive rod generates vibration waveform excitation.
2. The invention discloses a prestress controllable vibration excitation method and device, which respectively apply an alternating magnetic field and a direct current bias magnetic field to a giant magnetostrictive material rod in a double-layer coil mode, namely, the giant magnetostrictive rod accurately controlled by prestress generates sine waveform-changed vibration excitation with balanced load capacity and excellent waveform quality, and pushes a vibration table to generate high-quality vibration waveforms with balanced load capacity for providing vibration excitation under various environments.
3. The invention discloses a vibration excitation method and device with controllable prestress, which can be used in air and can also be used for vibration excitation of underwater environment.
Drawings
Fig. 1 is a schematic structural diagram of a vibration excitation device with controllable prestress, which is disclosed by the invention.
Wherein: 1-a first support body, 2-a second support body, 3-a third support body, 4-a giant magnetostrictive material rod, 5-a first magnet exciting coil, 6-a second magnet exciting coil, 7-a first metal gasket, 8-a load sensor, 9-a vibration table top, 10-an elastic beam, 11-a flexible supporting rod, 12-a second metal gasket, 13-a piezoelectric stack, 14-a third metal gasket, 15-a first power amplifier, 16-a first direct current signal source, 17-a second power amplifier, 18-a sine signal generator, 19-a low-pass filter, 20-a dynamometer, 21-an electronic computer, 22-a second direct current signal source and 23-a third power amplifier.
Detailed Description
To better illustrate the objects and advantages of the present invention, the following further description is made with reference to the accompanying drawings and examples.
Example 1:
as shown in fig. 1, the vibration excitation device with controllable prestress disclosed in this embodiment is composed of a first support 1, a second support 2, a third support 3, a giant magnetostrictive material rod 4, a first excitation coil 5, a second excitation coil 6, a first metal gasket 7, a second metal gasket 12, a third metal gasket 14, a load sensor 8, a vibration table 9, an elastic beam 10, a flexible support rod 11, a piezoelectric stack 13, a first power amplifier 15, a second power amplifier 17, a third power amplifier 23, a first dc signal source 16, a second dc signal source 22, a sinusoidal signal generator 18, a low-pass filter 19, a force measuring instrument 20, and an electronic computer 21, as shown in fig. 1.
The first supporting body 1 is used for fixedly supporting the elastic beam 10; the second support body 2 is used for fixedly supporting the piezoelectric stack 13; the third support body 3 is used for fixedly supporting the giant magnetostrictive material rod 4.
The piezoelectric stack 13 drives the flexible support rod 11 through the second metal gasket 12 by means of self expansion and contraction, so that the acting force on the elastic beam 10 is regulated and controlled, and the prestress of the giant magnetostrictive material rod 4 is controlled through the vibration table 9, the load sensor 8 and the first metal gasket 7.
The first metal shim 7 uniformly transfers the prestress transferred from the load cell 8 to the giant magnetostrictive material rod 4.
The second metal pad 12 and the third metal pad 14 protect the piezoelectric stack 13 and prevent the ceramic of the piezoelectric stack 13 from cracking.
The load sensor 8 is used for measuring the prestress of the giant magnetostrictive material rod 4 so as to carry out quantitative closed-loop control; the low-pass filter 19 is used for filtering alternating current components in signals obtained by the load sensor 8, only keeping direct current components and measuring prestress; the load cell 20 is used to measure the prestress; the electronic computer 21 is used for obtaining the prestress value and regulating and controlling the output value of the second direct current signal source 22 according to the prestress value, so that the prestress value obtained by the measurement of the dynamometer 20 is kept at a set target value; the third power amplifier 23 is used for power-driving the piezoelectric stack 13 to generate a set prestress;
the first direct current signal source 16 is used for generating a required direct current signal; the first power amplifier 15 is used to power-amplify the signal generated by the first dc signal source 16 so as to effectively drive the second excitation coil 6 to generate the dc bias magnetic field required for the giant magnetostrictive material rod 4.
The sine signal generator 18 is used for generating a required sine signal; the second power amplifier 17 is used for power amplifying the signal generated by the sinusoidal signal generator 18 so as to effectively drive the first excitation coil 5 to generate the required sinusoidal excitation magnetic field, thereby driving the telescopic motion of the giant magnetostrictive material rod 4 to generate vibration excitation on the vibration table 9 through the transmission of the first metal gasket 7 and the load sensor 8.
The assembling and working method of the vibration exciting device with controllable prestress disclosed by the embodiment comprises the following steps:
the elastic beam 10 and the vibration table top 9 are fixedly installed together through threaded connection and fixed on the first support body 1;
the second metal gasket 12, the third metal gasket 14 and the piezoelectric stack 13 are fixedly mounted and fastened on the second support body 2 through the third metal gasket 14; meanwhile, the flexible support rod 11 is flexibly connected with the elastic beam 10;
installing and fastening a giant magnetostrictive material rod 4 sleeved with a first excitation coil 5 and a second excitation coil 6 on a third supporting body 3; and is connected with the elastic beam 10 through the first metal gasket 7, the load sensor 8 and the vibration table 9 in sequence. And wired as shown in fig. 1.
Setting a prestress value through an electronic computer 21, regulating and controlling a direct current value output by a second direct current signal source 22, applying the prestress value to the piezoelectric stack 13 through a third power amplifier 23, controlling the piezoelectric stack 13 to stretch and generate prestress, wherein the prestress is supported by a second support body 2 and a third metal gasket 14 and is applied to the giant magnetostrictive material rod 4 through a second metal gasket 12, a flexible support rod 11, an elastic beam 10, a vibration table top 9, a load sensor 8 and a first metal gasket 7; meanwhile, a prestress signal is obtained by measurement of the load sensor 8, the prestress signal enters the dynamometer 20 after being filtered by the low-pass filter 19 to obtain a measured value, then the measured value is read by the electronic computer 21, the electronic computer 21 compares the read prestress value measurement result with a target set value, then the direct current value output by the second direct current signal source 22 is readjusted until the difference between the two is smaller than a predetermined range, and then the prestress control iteration process is completed.
The first dc signal source 16 outputs a dc signal, which is transmitted to the first power amplifier 15 for power amplification, and then drives the second excitation coil 6 to generate a dc bias magnetic field required by the giant magnetostrictive material rod 4.
The sinusoidal signal generator 18 outputs a sinusoidal signal; the vibration excitation waveform is transmitted to a second power amplifier 17 for power amplification, then the first excitation coil 5 is driven to generate a required sinusoidal excitation magnetic field, the giant magnetostrictive material rod 4 is driven to generate telescopic motion, and the vibration excitation waveform is generated on the vibration table top 9 through the transmission of the first metal gasket 7 and the load sensor 8.
The above detailed description is intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above detailed description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A vibration exciting apparatus having controllable prestress, characterized in that: the device mainly comprises a first support body (1), a second support body (2), a third support body (3), a giant magnetostrictive material rod (4), a first magnet exciting coil (5), a second magnet exciting coil (6), a first metal gasket (7), a second metal gasket (12), a third metal gasket (14), a load sensor (8), a vibration table top (9), an elastic beam (10), a flexible supporting rod (11), a piezoelectric stack (13), a first power amplifier (15), a second power amplifier (17), a third power amplifier (23), a first direct current signal source (16), a second direct current signal source (22), a sinusoidal signal generator (18), a low-pass filter (19), a dynamometer (20) and an electronic computer (21);
the first supporting body (1) is used for fixedly supporting the elastic beam (10); the second support body (2) is used for fixedly supporting the piezoelectric stack (13); the third support body (3) is used for fixedly supporting the giant magnetostrictive material rod (4);
the piezoelectric stack (13) drives the flexible supporting rod (11) through the second metal gasket (12) through self expansion and contraction, so that the acting force on the elastic beam (10) is regulated and controlled, and the prestress of the giant magnetostrictive material rod (4) is controlled through the vibration table top (9), the load sensor (8) and the first metal gasket (7);
the first metal gasket (7) transmits the prestress transmitted by the load sensor (8) to the giant magnetostrictive material rod (4) in a balanced manner;
the second metal gasket (12) and the third metal gasket (14) play a role in protecting the piezoelectric stack (13) and prevent the ceramic of the piezoelectric stack (13) from being cracked;
the load sensor (8) is used for measuring the prestress of the giant magnetostrictive material rod (4) so as to facilitate quantitative closed-loop control; the low-pass filter (19) is used for filtering alternating current components in signals obtained by the load sensor (8), only retaining direct current components and being used for measuring prestress; the force measuring instrument (20) is used for measuring prestress; the electronic computer (21) is used for obtaining the prestress value and regulating and controlling the output value of the second direct current signal source (22) according to the prestress value, so that the prestress value obtained by measurement of the dynamometer (20) is kept at a set target value; the third power amplifier (23) is used for power driving the piezoelectric stack (13) to generate a set prestress;
the first direct current signal source (16) is used for generating a required direct current signal; the first power amplifier (15) is used for amplifying the power of the signal generated by the first direct current signal source (16) so as to effectively drive the second excitation coil (6) and generate a direct current bias magnetic field required by the giant magnetostrictive material rod (4);
the sine signal generator (18) is used for generating a required sine signal; the second power amplifier (17) is used for amplifying the power of the signal generated by the sinusoidal signal generator (18) so as to effectively drive the first excitation coil (5) to generate a required sinusoidal excitation magnetic field, thereby driving the telescopic motion of the giant magnetostrictive material rod (4) to generate vibration excitation on the vibration table top (9) through the transmission of the first metal gasket (7) and the load sensor (8).
2. A vibration exciter with controllable prestress according to claim 1, wherein: the sine signal generator (18) is replaced by an arbitrary wave generator to generate square waves, triangular waves, step waves and other non-sine signal waveforms, so that the vibration exciting device with corresponding waveforms is obtained.
3. A vibration exciter with controllable prestress according to claim 1, wherein: the underwater dynamic strain excitation device is characterized in that a first support body (1), a second support body (2), a third support body (3), a giant magnetostrictive material rod (4), a first magnet exciting coil (5), a second magnet exciting coil (6), a first metal gasket (7), a second metal gasket (12), a third metal gasket (14), a load sensor (8), a vibration table board (9), an elastic beam (10), a flexible supporting rod (11) and a piezoelectric stack (13) are placed into water after being insulated and sealed, and therefore the underwater dynamic strain excitation device is obtained.
4. A vibration exciting device with controllable prestress according to claim 1, 2 or 3, wherein: the assembling and working method comprises the following steps of,
the elastic beam (10) and the vibration table top (9) are fixedly installed together through threaded connection and fixed on the first support body (1);
the second metal gasket (12), the third metal gasket (14) and the piezoelectric stack (13) are fixedly arranged on the second support body (2) through the third metal gasket (14); meanwhile, the flexible support rod (11) is flexibly connected with the elastic beam (10);
installing and fastening a giant magnetostrictive material rod (4) sleeved with a first excitation coil (5) and a second excitation coil (6) on a third support body (3); the vibration table is connected with the elastic beam (10) through a first metal gasket (7), a load sensor (8) and a vibration table top (9) in sequence; and wired as shown in fig. 1;
setting a prestress value through an electronic computer (21), regulating and controlling a direct current value output by a second direct current signal source (22), applying the prestress value to a piezoelectric stack (13) through a third power amplifier (23), controlling the piezoelectric stack (13) to stretch and generate prestress, wherein the prestress is supported by a second support body (2) and a third metal gasket (14) and is applied to a giant magnetostrictive material rod (4) through a second metal gasket (12), a flexible support rod (11), an elastic beam (10), a vibration table top (9), a load sensor (8) and a first metal gasket (7); meanwhile, a prestress signal is obtained by measurement of the load sensor (8), the prestress signal enters the dynamometer (20) to obtain a measured value after being filtered by the low-pass filter (19), then the measured value is read by the electronic computer (21), the electronic computer (21) compares the read prestress value measurement result with a target set value in a difference mode, then the direct current value output by the second direct current signal source (22) is readjusted until the difference between the two is smaller than a stipulated range, and then the prestress control iteration process is completed;
a first direct current signal source (16) outputs a direct current signal, the direct current signal is transmitted to a first power amplifier (15) for power amplification, then, a second excitation coil (6) is driven, and a direct current bias magnetic field required by the giant magnetostrictive material rod (4) is generated;
the sine signal generator (18) outputs a sine signal; the vibration excitation wave is transmitted to a second power amplifier (17) for power amplification, then, a first excitation coil (5) is driven to generate a required sinusoidal excitation magnetic field, a giant magnetostrictive material rod (4) is driven to generate telescopic motion, and a high-quality vibration excitation wave with balanced load capacity is generated on a vibration table top (9) through the transmission of a first metal gasket (7) and a load sensor (8) and is used for providing vibration excitation under various environments.
5. A prestress-controllable vibration exciting method using a prestress-controllable vibration exciting apparatus according to claim 1, characterized in that: the method is characterized in that a piezoelectric stack is combined with a T-shaped beam mode, prestress with controllable magnitude is applied to a giant magnetostrictive material rod through a lever principle, the prestress value is accurately regulated and controlled in a closed loop mode, an alternating magnetic field and a direct current bias magnetic field are respectively applied to the giant magnetostrictive material rod in a double-layer coil mode, the giant magnetostrictive material rod is driven to generate telescopic motion, and therefore high-quality vibration waveforms with balanced load capacity are generated and used for providing vibration excitation in various environments.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62292099A (en) * | 1986-06-02 | 1987-12-18 | レイセオン カンパニ− | Magnetostriction driving module |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4975643A (en) * | 1989-04-05 | 1990-12-04 | Fisher Controls International, Inc. | Measurement and control of magnetostrictive transducer motion using strain sensors |
| JPH0556934A (en) * | 1991-09-04 | 1993-03-09 | Nikon Corp | Probe for biodiagnosis using super-magnetostriction material |
| JP2000356505A (en) * | 1999-06-16 | 2000-12-26 | Toyota Central Res & Dev Lab Inc | Strain detecting element |
| CN100501360C (en) * | 2007-09-07 | 2009-06-17 | 河北工业大学 | Magnetostrictive stress sensor |
| DE102014103299B4 (en) * | 2014-03-12 | 2021-07-22 | Spektra Schwingungstechnik Und Akustik Gmbh Dresden | Vibration exciter with load compensation |
| CN104946880B (en) * | 2015-05-29 | 2017-09-19 | 北京交通大学长三角研究院 | The ultrasound-enhanced device of rareearth super magnetostrictive |
| CN207147899U (en) * | 2017-08-24 | 2018-03-27 | 吉林大学 | Multistage quiet Dynamic Coupling mechanical loading unit for high frequency fatigue test |
| CN108398099B (en) * | 2017-11-09 | 2020-03-20 | 中国航空工业集团公司北京长城计量测试技术研究所 | Correction method for single-point laser strain calibration error |
| CN109813950A (en) * | 2019-01-10 | 2019-05-28 | 太原理工大学 | A kind of fiber bragg grating current transformer based on giant magnetostrictive material |
| CN209910578U (en) * | 2019-05-06 | 2020-01-07 | 中国地震局地震研究所 | Ultra-wide band extensometer and calibration device |
| CN110542401B (en) * | 2019-10-08 | 2021-04-13 | 中国航空工业集团公司北京长城计量测试技术研究所 | Sinusoidal strain generating device based on double piezoelectric ceramic push-pull drive |
| CN111649660A (en) * | 2020-05-29 | 2020-09-11 | 天津大学 | Phase-locked amplification-based capacitive displacement measurement device and method |
-
2020
- 2020-10-14 CN CN202011093721.3A patent/CN112254911B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62292099A (en) * | 1986-06-02 | 1987-12-18 | レイセオン カンパニ− | Magnetostriction driving module |
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