CN105372138A - Method and device for long-service life fatigue testing of guitar chords and keys - Google Patents
Method and device for long-service life fatigue testing of guitar chords and keys Download PDFInfo
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- CN105372138A CN105372138A CN201510705794.6A CN201510705794A CN105372138A CN 105372138 A CN105372138 A CN 105372138A CN 201510705794 A CN201510705794 A CN 201510705794A CN 105372138 A CN105372138 A CN 105372138A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a device for long-service life fatigue testing of guitar chords and keys. The device comprises a force application assembly, a driving mechanism, a force sensor and a control assembly, wherein the force application assembly at least is used for applying force to guitar chords and/or keys; the driving mechanism at least is used for driving the force application assembly to apply force to the guitar chords and/or keys; the force sensor at least is used for detecting force applied by the force application assembly; and the control assembly at least is used for controlling a working state of the driving mechanism according to signals fed back by the force sensor and the driving assembly. The invention further discloses a corresponding method for the long-service life fatigue testing of the guitar chords and keys. The device and method for the long-service life fatigue testing of the guitar chords and keys can be applied to press tests of pull tests of the guitar chords and key or chord grades and can well simulate actual working conditions of equivalent guitar chords and keys, and accurate testing of performances and fatigue lives of the guitar chords and keys is achieved.
Description
Technical field
The present invention be more particularly directed to a kind of guitar string bond distance life-span method for testing fatigue and device.
Background technology
Guitar is a kind of plucked instrument, in pop music, rock music, Blues, folk song, Flamenco, is often regarded as dominant musical instrument.Because guitar is mainly by string vibration sounding, therefore string product confrontation guitar tonequality has very important impact.At present, the string that folk rhyme guitar uses is all based on string wire substantially, and multiplex nylon on classical guitar.For making guitar keep good tone color, the behaviour in service of general reply string and serviceable life etc. test.
Unfortunately, so far also comparatively not effective guitar string key energy and fatigue lifetime checkout equipment and method.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of guitar string bond distance life-span method for testing fatigue and device, to overcome the deficiencies in the prior art.
For realizing aforementioned invention object, the technical solution used in the present invention comprises:
A kind of guitar string bond distance life-span method for testing fatigue, it comprises:
Force assembly is ordered about to guitar string and/or key force by the setting power spectral curve that control module provides with driving mechanism;
Detect the force size of force assembly with force snesor in real time, and obtained force signal is fed back to control module, and the position signalling of force assembly is fed back to control module by driving mechanism;
Control module exports force speed and force size control signal according to described force signal and described position signalling to driving mechanism;
Compose with the actual measurement power of data acquisition system force snesor, obtain actual measurement power spectral curve, if actual measurement power spectral curve does not meet testing requirements, then adjust described setting power spectral curve, until obtain the actual measurement power spectral curve met the demands.
Comparatively preferred, described driving mechanism comprises linear servo-actuator, and described linear servo-actuator is connected with driving power through motor driver, and described motor driver is connected with control module, and is provided with impulse meter in described motor driver.
Further, described method of testing also comprises: provide drive current with driving power to motor driver, and be modulated to PTC mode drive signal by motor driver, directly control DC servo motor with described PTC drive singal again, make DC servo motor produce power and be applied on guitar string and/or key by force assembly.
Further, described method of testing also comprises:
In the process that force assembly exerts a force to guitar string and/or key, pulse step signal is produced by the impulse meter in motor driver, and at least the impulse speed signal and position signalling that derive from described pulse step signal are fed back to control module, and to be exerted a force the force size of assembly by force snesor examinations, and the force signal detected by force snesor is fed back to control module;
Control module exports force speed and force size control signal according to described position signalling and force signal to driving mechanism respectively.
Further, described method of testing also comprises: in the process of force assembly to guitar string and/or key force, the position signalling that the initial position of each pulse of described force assembly is produced by described impulse meter and the force signal that described force snesor exports determine jointly.
A kind of guitar string bond distance life-span fatigue test device, it comprises driving mechanism, force assembly, force snesor and control module, described force assembly and driving mechanism are in transmission connection, described driving mechanism is connected with control module respectively with force snesor, when testing, described force assembly coordinates with guitar string, and described force snesor is connected with force assembly.
Among some more specifically preferred embodiment, described driving mechanism comprises linear servo-actuator, and described linear servo-actuator is connected with driving power through motor driver, and described motor driver is connected with control module.
Further, impulse meter is provided with in described motor driver.
Particularly preferred, described driving mechanism, motor driver, force snesor and control module are connected to form close loop control circuit.
Further, described force assembly comprises pressure string or pressure key test assembly, and described pressure string or pressure key test assembly comprise the simulation of pressure string and refer to, described pressure string is simulated the finger tip portion referred to and is provided with finger damping material.
Further, described force assembly comprises test assembly of manipulating the strings, described in test assembly of manipulating the strings comprise stirring the plectrum of guitar string.
Further, described control module comprises MCU or PLC, but is not limited thereto.
Further, described guitar string bond distance life-span fatigue test device also comprises support, and when testing, at least described driving mechanism, force assembly, force snesor and guitar are fixedly connected with described support.
Compared with prior art, beneficial effect of the present invention comprises: this guitar string bond distance's life-span method for testing fatigue and device can be applicable to the pressing test of moving with the hand test and key or string grade of guitar string, and can the actual condition of analog equivalent guitar string key well, realize the performance to guitar string key and the accurate test of fatigue lifetime.
Hereafter do more detailed explanation explanation by technical scheme of the present invention.But, should be appreciated that within the scope of the present invention, above-mentioned each technical characteristic of the present invention and can combining mutually between specifically described each technical characteristic in below (eg embodiment), thus form new or preferred technical scheme.As space is limited, tiredly no longer one by one to state at this.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of guitar string bond distance life-span fatigue test device among one embodiment of this invention;
Fig. 2 is the frame diagram of a kind of guitar string bond distance life-span fatigue test device among one embodiment of this invention;
Fig. 3 is a kind of structural representation of pressing string or pressure key test assembly among one embodiment of the invention;
Fig. 4 is the structural representation of a kind of test assembly of manipulating the strings among one embodiment of the invention;
Description of reference numerals: mounting bracket 1, linear servo-actuator 2, guitar 3, force snesor 4, mounting plane 5, force assembly 6, the simulation of pressure string refer to 61, finger damping material 62, plectrum 63.
Embodiment
As previously mentioned, in view of many deficiencies of prior art, inventor, through long-term and deep research and a large amount of practice, is proposed technical scheme of the present invention, is referred to hereafter.
A kind of guitar string bond distance life-span fatigue test device that the present invention relates to comprises driving mechanism, force assembly, force snesor and control module, described force assembly and driving mechanism are in transmission connection, described driving mechanism is connected with control module respectively with force snesor, when testing, described force assembly coordinates with guitar string, and described force snesor is connected with force assembly.
Refer to Fig. 1-Fig. 2, among some more specifically preferred embodiment, described driving mechanism comprises linear servo-actuator 2, and described linear servo-actuator 2 is connected with driving power through motor driver, and described motor driver is connected with control module.Further, impulse meter is provided with in described motor driver.
Further, described control module comprises MCU or PLC, but is not limited thereto.
Further, described guitar string bond distance life-span fatigue test device also comprises mounting bracket 1, and when testing, at least described driving mechanism, force assembly, force snesor 4 and guitar 3 are fixedly connected with described mounting bracket 1.
Particularly preferred, refer to Fig. 2, described driving mechanism, motor driver, force snesor and control module are connected to form close loop control circuit.
Further, described force assembly 6 comprises pressure string or presses key test assembly and/or test assembly of manipulating the strings.
Further, refer to Fig. 3, among some embodiments, described pressure string or pressure key test assembly comprise the simulation of pressure string and refer to 61, and described pressure string is simulated the finger tip portion referred to and is provided with finger damping material 62.
Further, refer to Fig. 4, among some embodiments, described in test assembly of manipulating the strings comprise stirring the plectrum 63 of guitar string.
Further, described pressure string or pressure key test assembly and manipulate the strings test assembly can synchro control also can asynchronous controlling.
As follows to press string to press the course of work of key test assembly to be described:
First produce certain voltage by driving power 1, the direct current supply motor driver 2 of such as 24V, is modulated to the signal of PTC (step-by-step counting control) pattern via motor driver 2;
The PTC drive singal being modulated generation by motor driver 2 is directly used in control DC servo motor 4, and by the stretching motion of DC servo motor 4 driving stem, the power of generation is applied on guitar string key by artificial hand's finger and damping material;
The power spectral curve that MCU or PLC 3 control required by spectrogram according to the test pressure preset exerts a force, and the pulse number applying power is controlled by MCU or PLC 3;
In the process of pressing guitar string key, produce pulse step signal by the impulse meter in motor driver 2, impulse speed signal and position signalling can be extracted from this signal, feed back to MCU or PLC 3, be used as the speeds control of force;
In the process of pressing guitar string key, detect that force signal feeds back to the control that MCU or PLC 3 are used as force size by force snesor 5;
In the process of pressing guitar string key, jointly determined the initial position of each pulse of force application apparatus by the position signalling extracted in motor driver 2 and the force signal detected by force snesor 5;
Via the actual measurement power spectrum of additional data acquisition system force snesor 5, obtain the controlling curve of expecting, when the power spectral curve of surveying does not meet testing requirements, by the program adjustment in adjustment MCU or PLC 3, until obtain the trial curve met the demands.
The present invention is according to associated mechanical electrical principle, applicable line servomotor and closed loop control method devise this guitar string bond distance life-span fatigue test device innovatively, it has feature easy to implement easy for installation, compared to traditional type rotary shaft motor, better can adjust and control force size and force speed.
Preferably, the present invention adopts synchronous detection pulse number signal and force signal, the common initial position determining force, has ensured the no periodic force error accumulation phenomenon that works long hours.
Present invention achieves the stable pressurized control of guitar string key fatigue life test, suit the actual condition during work of guitar string key, effectively demonstrate guitar string key fatigue lifetime under a certain pressure.
Be to be understood that; above-mentioned embodiment is only and technical conceive of the present invention and architectural feature is described; object is to allow the stakeholder being familiar with technique implement according to this; but above said content does not limit the scope of the invention; every any equivalence done according to Spirit Essence of the present invention changes or modifies, and all should fall within protection scope of the present invention.
Claims (10)
1. a guitar string bond distance life-span method for testing fatigue, is characterized in that comprising:
Force assembly is ordered about to guitar string and/or key force by the setting power spectral curve that control module provides with driving mechanism;
Detect the force size of force assembly with force snesor in real time, and obtained force signal is fed back to control module, and the position signalling of force assembly is fed back to control module by driving mechanism;
Control module exports force speed and force size control signal according to described force signal and described position signalling to driving mechanism;
Compose with the actual measurement power of data acquisition system force snesor, obtain actual measurement power spectral curve, if actual measurement power spectral curve does not meet testing requirements, then adjust described setting power spectral curve, until obtain the actual measurement power spectral curve met the demands.
2. guitar string bond distance life-span method for testing fatigue according to claim 1, it is characterized in that described driving mechanism comprises linear servo-actuator, described linear servo-actuator is connected with driving power through motor driver, described motor driver is connected with control module, and is provided with impulse meter in described motor driver.
3. guitar string bond distance life-span method for testing fatigue according to claim 2, characterized by further comprising: provide drive current with driving power to motor driver, and be modulated to PTC mode drive signal by motor driver, directly control DC servo motor with described PTC drive singal again, make DC servo motor produce power and be applied on guitar string and/or key by force assembly.
4. guitar string bond distance life-span method for testing fatigue according to claim 2, characterized by further comprising:
In the process that force assembly exerts a force to guitar string and/or key, pulse step signal is produced by the impulse meter in motor driver, and at least the impulse speed signal and position signalling that derive from described pulse step signal are fed back to control module, and to be exerted a force the force size of assembly by force snesor examinations, and the force signal detected by force snesor is fed back to control module;
Control module exports force speed and force size control signal according to described position signalling and force signal to driving mechanism respectively.
5. guitar string bond distance life-span method for testing fatigue according to claim 2, characterized by further comprising: in the process of force assembly to guitar string and/or key force, the position signalling that the initial position of each pulse of described force assembly is produced by described impulse meter and the force signal that described force snesor exports determine jointly.
6. a guitar string bond distance life-span fatigue test device, is characterized in that comprising:
Force assembly, at least in order to exert a force to guitar string and/or key;
Driving mechanism, at least in order to order about described force assembly to guitar string and/or key force;
Force snesor, at least in order to detect the force size of force assembly;
Control module, at least controls the duty of described driving mechanism in order to the signal according to described force snesor and described driving mechanism feedback.
7. guitar string bond distance life-span fatigue test device according to claim 6, it is characterized in that described driving mechanism comprises linear servo-actuator, described linear servo-actuator is connected with driving power through motor driver, described motor driver is connected with control module, and is provided with impulse meter in described motor driver.
8. the guitar string bond distance life-span fatigue test device according to claim 6 or 7, is characterized in that described driving mechanism, motor driver, force snesor and control module are connected to form close loop control circuit.
9. guitar string bond distance life-span fatigue test device according to claim 6, is characterized in that:
Described force assembly comprises pressure string or pressure key test assembly, and described pressure string or pressure key test assembly comprise the simulation of pressure string and refer to, described pressure string is simulated the finger tip portion referred to and is provided with finger damping material;
And/or described force assembly comprises test assembly of manipulating the strings, described in test assembly of manipulating the strings comprise stirring the plectrum of guitar string.
10. guitar string bond distance life-span fatigue test device according to claim 6, is characterized in that described control module comprises MCU or PLC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510705794.6A CN105372138B (en) | 2015-10-27 | 2015-10-27 | A kind of guitar string bond distance service life method for testing fatigue and device |
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| CN201510705794.6A CN105372138B (en) | 2015-10-27 | 2015-10-27 | A kind of guitar string bond distance service life method for testing fatigue and device |
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| CN105372138B CN105372138B (en) | 2018-08-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107068118A (en) * | 2017-04-28 | 2017-08-18 | 杨致俭 | A kind of control method of seven-stringed plucked instrument in some ways similar to the zither harmonic vibration apparatus for initializing |
| CN107123412A (en) * | 2017-04-28 | 2017-09-01 | 杨致俭 | A kind of seven-stringed plucked instrument in some ways similar to the zither harmonic vibration apparatus for initializing |
| CN112133262A (en) * | 2020-08-21 | 2020-12-25 | 广东工业大学 | Automatic playing device applied to plucked string instrument |
| CN113125336A (en) * | 2021-04-25 | 2021-07-16 | 赵岚 | Zither artificial nail testing device |
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Cited By (4)
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|---|---|---|---|---|
| CN107068118A (en) * | 2017-04-28 | 2017-08-18 | 杨致俭 | A kind of control method of seven-stringed plucked instrument in some ways similar to the zither harmonic vibration apparatus for initializing |
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| CN112133262A (en) * | 2020-08-21 | 2020-12-25 | 广东工业大学 | Automatic playing device applied to plucked string instrument |
| CN113125336A (en) * | 2021-04-25 | 2021-07-16 | 赵岚 | Zither artificial nail testing device |
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| CN105372138B (en) | 2018-08-10 |
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