Calibration method between main controller and rotating shaft for pull-free microphone
The application is a divisional application of the invention patent application, namely 'a microphone without pulling'.
Application date of the original case: 2016-04-07.
Original application No.: 2016102092632.
the name of the original invention is: a microphone without pulling is disclosed.
Technical Field
A calibration method between a main controller and a rotating shaft for a microphone without pulling belongs to the field of music and music teaching.
Background
Singing is a very favorite entertainment item for many people. Singing, however, has many professions, including the use of microphones, which are not mastered by laypersons.
For example, in the wheat pulling skill, when a certain long tone is sung, the microphone is pulled to be gradually far away from the mouth, and a special music effect is obtained. Time, distance and microphone moving speed are very important skills, and a nonprofessional singer is difficult to master the microphone pulling skill. This may restrict the artistic effect of singing.
Disclosure of Invention
In order to solve the problem that a nonprofessional singer is difficult to master the microphone pulling skill to influence the singing effect, the invention designs the microphone without pulling the microphone, the microphone pulling effect can be realized without pulling the microphone, the microphone pulling effects with the same time, distance and moving speed are almost the same, and the artistic effect of singing is effectively improved.
The purpose of the invention is realized as follows:
a microphone without pulling comprises an acousto-optic modulator, a light intensity attenuation system, a photoelectric converter, a sound sensor and a main controller;
the acousto-optic modulator and the photoelectric converter are arranged on the same straight line, and the light intensity attenuation system is arranged between the acousto-optic modulator and the photoelectric converter;
the output end of the sound sensor is connected with the input end of the main controller, and the output end of the controller is connected with the light intensity attenuation system.
The light intensity attenuation system of the pull-free microphone comprises a rotating shaft and a plurality of attenuation pieces distributed on the rotating shaft, wherein the attenuation pieces are different in attenuation proportion; the main controller controls the rotation of the rotating shaft.
The pull-free microphone comprises a vacuum cavity, wherein the light intensity attenuation system, the photoelectric converter and the main controller are arranged in the vacuum cavity; the acousto-optic modulator and acoustic sensor are disposed at the boundary of the vacuum chamber.
The calibration method of the microphone without pulling, the main controller and the rotating shaft is as follows:
step a, establishing an empirical relation of sound intensity Q, frequency f and holding time t; wherein, the sound intensity Q is a dependent variable, and the frequency f and the holding time t are independent variables;
b, calibrating a functional relation of the sound intensity Q and the light intensity I;
step c, calibrating a functional relation between the light intensity I and the rotating shaft rotation angle α;
and d, establishing a functional relation of the frequency f, the maintaining time t and the rotation angle α, wherein the rotation angle α is a dependent variable, and the frequency f and the maintaining time t are independent variables.
The empirical relationship stated in step a is obtained by maintaining the average value of time t at a certain sound intensity Q and frequency f for a plurality of persons.
The implementation method of the wheat without wheat pulling comprises the following steps:
the sound-light modulator converts the sound signal into light signal, and the light signal is attenuated by the light intensity attenuation system and converted into electric signal by the photoelectric converter, meanwhile, the sound sensor collects the sound frequency information and sends the information to the main controller for processing, and the main controller adjusts the angle α of the rotating shaft according to the intensity Q of the sound with the frequency f and the maintaining time t.
Has the advantages that:
firstly, the acousto-optic modulator and the photoelectric converter are arranged on the same straight line, and the light intensity attenuation system is arranged between the acousto-optic modulator and the photoelectric converter; therefore, the output signal of the photoelectric converter can be changed by adjusting the attenuation proportion of the light intensity attenuation system while the sound output of the acousto-optic modulator is not changed, and the wheat pulling effect is realized;
the output end of the sound sensor is connected with the input end of the main controller, and the output end of the controller is connected with the light intensity attenuation system; by the design, the maintenance time of sound with a certain frequency can be detected by the sound sensor, and the attenuation proportion required by the wheat is further obtained;
above two technical scheme combine together, judge the frequency and the holding time that sound sensor gathered sound according to main control unit, adjust the decay proportion of light intensity decay system, and then change photoelectric converter output signal's intensity, realize drawing the wheat effect, effectively improve the artistic effect of singing.
Drawings
Fig. 1 is a schematic structural diagram of a microphone according to the present invention.
Fig. 2 is a schematic diagram of the structure of the light intensity attenuating system.
In the figure: 1 acousto-optic modulator, 2 light intensity attenuation system, 21 rotation axis, 22 attenuation piece, 3 photoelectric converter, 4 sound sensor, 5 main controller.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Detailed description of the preferred embodiment
Fig. 1 shows a schematic structural diagram of the pull-free microphone according to this embodiment. The microphone comprises an acoustic-optical modulator 1, a light intensity attenuation system 2, a photoelectric converter 3, a sound sensor 4 and a main controller 5;
the acousto-optic modulator 1 and the photoelectric converter 3 are arranged on the same straight line, and the light intensity attenuation system 2 is arranged between the acousto-optic modulator 1 and the photoelectric converter 3;
the output end of the sound sensor 4 is connected with the input end of the main controller 5, and the output end of the controller 5 is connected with the light intensity attenuation system 2.
Detailed description of the invention
The microphone of the present embodiment further defines, on the basis of the first specific embodiment, that the light intensity attenuation system 2 includes a rotating shaft 21 and a plurality of attenuation pieces 22 distributed on the rotating shaft 21 and having different attenuation ratios, as shown in fig. 2; the main controller 5 controls the rotation of the rotation shaft 21.
It should be noted that the attenuation sheet 22 in fig. 2 is a discrete gradual attenuation, and the more discrete values, the more phase difference, and the finer the change. Of course a continuously gradual decay may also be used.
Detailed description of the preferred embodiment
The microphone of this embodiment further includes, on the basis of the first embodiment or the second embodiment, a vacuum chamber, wherein the light intensity attenuation system 2, the photoelectric converter 3, and the main controller 5 are disposed in the vacuum chamber; the acousto-optic modulator 1 and the acoustic sensor 4 are arranged at the boundary of the vacuum chamber.
The structural design can avoid the interference of external sound, so that the tone quality is fuller and cleaner.
Detailed description of the invention
The microphone of this embodiment further defines the calibration method between the main controller 5 and the rotating shaft 21 based on the second embodiment as follows:
step a, establishing an empirical relation of sound intensity Q, frequency f and holding time t; wherein, the sound intensity Q is a dependent variable, and the frequency f and the holding time t are independent variables;
b, calibrating a functional relation of the sound intensity Q and the light intensity I;
step c, calibrating a functional relation between the light intensity I and the rotation angle α of the rotating shaft 21;
and d, establishing a functional relation of the frequency f, the maintaining time t and the rotation angle α, wherein the rotation angle α is a dependent variable, and the frequency f and the maintaining time t are independent variables.
Detailed description of the preferred embodiment
In the microphone according to the second embodiment, the empirical relationship in step a is further defined, and the average value of the time t at a certain sound intensity Q and frequency f obtained by a plurality of persons is maintained.
The design is beneficial to avoiding the phenomenon that the special unsatisfactory effect of the wheat pulling is caused by the subjective factor of a certain person.
Detailed description of the preferred embodiment
On the basis of the fourth specific embodiment or the fifth specific embodiment, the implementation method of the pull-free microphone of this embodiment is further defined as follows:
the acousto-optic modulator 1 converts the sound signal into an optical signal, and the optical signal is attenuated by the light intensity attenuation system 2 and then converted into an electric signal by the photoelectric converter 3, meanwhile, the sound sensor 4 collects the sound frequency information and sends the information to the main controller 5 for processing, and the main controller 5 adjusts the angle α of the rotating shaft 21 according to the intensity Q of the sound with the frequency f and the maintaining time t.