CN110944085B - Method for generating music by shaking smart phone - Google Patents
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- CN110944085B CN110944085B CN201911099612.XA CN201911099612A CN110944085B CN 110944085 B CN110944085 B CN 110944085B CN 201911099612 A CN201911099612 A CN 201911099612A CN 110944085 B CN110944085 B CN 110944085B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72409—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
- H04M1/72412—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories using two-way short-range wireless interfaces
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72442—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality for playing music files
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Abstract
The invention discloses a method for generating music by shaking a smart phone, which comprises the following steps: selecting a sensor corresponding to shaking induction in the smart phone; developing an application of the smart phone, constructing a sensor management object and a sensing monitoring management object in the smart phone by installing an APP, obtaining original sensing data by accessing the sensor and classifying the data according to spatial parameters for processing; defining actions and scales, respectively associating the processed data with the actions of shaking the smart phone, respectively mapping the data to each scale, and creating a sound pool and an audio playing object; and playing a musical scale sound corresponding to one action according to the detected shaking action of the smart phone. By applying the technical scheme of the invention, the sensor of the smart phone is utilized, the APP which is simply developed is used for reading the data sensed by the sensor and converting the data into the corresponding musical scale sounding, so that the sensing and controlling capability of music can be stimulated when a user waves the smart phone, the interest is increased, and the creation fun is obtained.
Description
Technical Field
The invention relates to a body feeling interaction technology in application development of a smart phone, in particular to a method for generating music by shaking the smart phone.
Background
The earliest step of motion sensing interaction technology into the public field of vision is that Wii Remote launched in the 2007 year of nintendo and Kinect launched in the 2010 year of microsoft, a new playing method of a motion sensing game (exgerplay) appears along with the two commercial products, and a very good mouth tablet and sales are obtained, so that most of the electronic game players can finally tell that a game handle is held in the front of a screen to stay in the playing period of 'passionate surge' game. Among the commercial products based on the somatosensory interaction technology, microsoft Kinect has been widely applied in the fields of medical treatment, body building, retail industry, education and training, scientific research and the like due to its excellent performance (simultaneous tracking of multiple persons, face tracking, multi-language voice recognition and the like) and strong technical support provided by microsoft (open Windows platform SDK, special development version Kinect).
The existing smart phone is often equipped with a plurality of sensors, such as an air pressure measurement sensor, a gyroscope, a light ray sensor, an infrared remote controller, a GPS/A-GPS, a Beidou, a Hall sensor, a distance sensor, an acceleration sensor and the like, wherein the functions of the sensors are different, and part of the sensors are closely related to the short-distance spatial motion of the smart phone.
Disclosure of Invention
The invention aims to solve the technical problem of stimulating interest in music while playing the mobility of children, provides a method for generating music by shaking a smart phone, and expands the somatosensory interaction application function of the smart phone.
In order to achieve the purpose, the invention specifically adopts the technical scheme that: a method for generating music by shaking a smart phone is characterized by comprising the following steps:
the method comprises the following steps: selecting a sensor corresponding to shaking induction in the smart phone;
step two: developing an application of the smart phone, constructing a sensor management object and a sensing monitoring management object in the smart phone by installing an APP, and accessing a sensor by calling two objects, acquiring original sensing data and classifying the data according to spatial parameters by a processor of the smart phone;
step three: defining actions and scales, respectively associating the processed data with the actions of shaking the smart phone, respectively mapping the actions to the scales, and creating a sound pool and an audio playing object;
step four: the method comprises the steps of presetting a lock for sending sensor data and a first threshold value for switching states in an APP, and playing a scale sound corresponding to an action according to the states of shaking actions and the lock of the smart phone obtained through detection.
Further, the first step also comprises selecting the type of the smart phone and the application development environment corresponding to the operating system of the smart phone.
Further, the sensor selected in the step one is at least an acceleration sensor or a gyroscope.
Further, the selected sensor is an acceleration sensor, the raw sensing data obtained in the second step contains a gravity component, and the data processing further comprises a low-pass filter for eliminating the gravity component.
Further, the selected sensor is an acceleration sensor, the data processed in the third step respectively correspond to three spatial axes and two directions of each axis, an axis multiplexing is defined by setting a second threshold value of the acceleration, the action of shaking the smart phone is judged by comparing the maximum absolute value and the direction of the three axial linear accelerations, and a scale is correspondingly matched.
Furthermore, in the fourth step, when the acceleration reaches the phonic value, the data is sent and the corresponding scale is played, when the acceleration reaches the phonic value and the data is sent, the data sending is suspended by the locking position, and when the acceleration is reduced to the first threshold value, the data sending is allowed by the locking position.
Further, the user holds or ties the smart phone on the wrist strap, and swings the arm to drive the smart phone to shake and sound, so as to form music.
Further, the single-row acceleration sensor is worn on shoes and socks or tied to the ankle, a data transmission channel is established with the smart phone through Bluetooth, and the single-row acceleration sensor is cooperatively sensed with the acceleration sensor in the smart phone corresponding to the arrangement of the expansion step two and the expansion step three of the single-row acceleration sensor; after a user holds or ties the smart phone on the wrist strap, the user dance the arm to drive the smart phone to rock and sound to be connected into music.
Further, the selected sensor is a gyroscope, angle change and actions of shaking the smart phone are established through the second step and the third step and are mapped to each scale respectively; the user binds the smart phone to the waist, and drives the smart phone to shake and sound through bending and twisting in all directions to be connected into music.
Furthermore, a single-column acceleration sensor is worn on the foot, a single-column gyroscope is arranged on the waist, data transmission channels are established with the smart phone through Bluetooth, and the single-column acceleration sensor or the single-column gyroscope is correspondingly added to expand the steps II and III so as to be cooperatively sensed with the acceleration sensor in the smart phone; after a user holds or ties the smart phone on the wrist strap, the user can drive the smart phone to shake and sound through the action combination of dance, foot dance, waist straightening and hip twisting to connect the smart phone with music.
The technical solution of the invention has the following remarkable technical effects: the method fully utilizes the sensor of the smart phone or expands the sensing hardware through the Bluetooth matching, reads the data sensed by the sensor through the simply developed APP and converts the data into the corresponding scale sounding, thereby being beneficial to stimulating the sensing and controlling ability of music when the user waves the smart phone, promoting interest and obtaining creation fun.
Drawings
Fig. 1 is a schematic diagram of a space coordinate system centered on a smart phone in the method of the present invention.
Fig. 2 is a schematic view of the scale distribution corresponding to the triaxial shaking motion of the present invention, which is exemplified by an acceleration sensor.
Fig. 3 is a schematic diagram of a functional flow of a smartphone APP in the method of the present invention.
FIG. 4 is a schematic diagram of data communication for developing applications in the method of the present invention.
Fig. 5 is a schematic diagram illustrating a pairing of a numbered musical notation and a shaking motion of a smart phone in an application example of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
According to a combination innovation principle, the invention provides a method for generating music by shaking a smart phone by combining the same sense of identity interaction of the smart phone. Different from the common gesture recognition technology based on shot image processing, the gesture recognition is realized based on the data acquisition and processing of the sensor carried by the smart phone. The limb activities of the holder of the smart phone are integrated, different directions of shaking are sensed and mapped into different scales, and corresponding scale sounds are played; the composition may be rocked based on the song profile as shown in fig. 5.
From the technical overview, the implementation process of the innovative method comprises the following steps. The method comprises the following steps: selecting a sensor corresponding to shaking induction in the smart phone; step two: developing an application of the smart phone, constructing a sensor management object and a sensing monitoring management object in the smart phone by installing an APP, and accessing a sensor by calling two objects, acquiring original sensing data and classifying the data according to spatial parameters by a processor of the smart phone; step three: defining actions and scales, respectively associating the processed data with the actions of shaking the smart phone, respectively mapping the actions to the scales, and creating a sound pool and an audio playing object; step four: the method comprises the steps of presetting a lock for sending sensor data and a first threshold value for switching states in an APP, and playing a scale sound corresponding to an action according to the states of shaking actions and the lock of the smart phone obtained through detection.
More specific examples are illustrated in conjunction with the figures and further detailed in sub-steps as follows.
The method further comprises the step of selecting the type of the smart phone and the application development environment corresponding to the operating system of the smart phone before the step one. For example, the Android Studio is used as a development environment for a smart phone corresponding to Android 9.0. Of course, the method can also be applied to smart phones that satisfy iOS under sufficient openness conditions. Meanwhile, in the first step, the sensor is at least an acceleration sensor or a gyroscope, sensing hardware with high precision and high speed reflecting the direction change of the smart phone is mainly considered, and a GPS/A-GPS, a Beidou or other light-sensitive sensors related to positioning are not considered. Acceleration sensors are preferred, and are sensors for measuring three-axis acceleration, as shown in fig. 1The acceleration is the instantaneous acceleration in each direction of the X, Y, Z axis according to Newton's second law. It should be noted that the three-axis acceleration measured by the sensor includes gravity acceleration, which is briefly stated that, when the mobile phone is placed on a horizontal desktop, the X, Y-axis acceleration is 0, and the Z-axis acceleration is about 9.8m2And/s is the local gravitational acceleration.
For developing the smart phone application in the second step, the first step needs to be focused on acquiring the sensor. In Android development, if a hardware sensor is to be accessed, a SensorManager object, i.e., a sensor manager, is first required. The object is obtained by using getSystemservice () and passing in the parameter SENSOR _ SERVICE. The code is as follows: MyManager = (SensorManager) getSystemService (SENSOR _ SERVICE).
With the administrator, it can be used to invoke various types of sensors that it wants to access. The desired sensor object is created by calling the method getDefaultSensor () of the SensorManager object, while passing the TYPE _ PROXIMITY constant indicating the sensor TYPE to the method, and so on as follows:
Mysensor1=MyManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE)；
Mysensor2=MyManager.getDefaultSensor(Sensor.TYPE_ACCELERATION)。
the listener is then registered, a SensorEventListener object is created in order to obtain the raw data collected by the sensors, and the sensormentlistener () method of the SensorManager object is used to connect to the listener, in which method the sensitivity of the sensors can be defined, the different sensitivities, the different reaction speeds, i.e. the different frequencies of reading data per second, generally the more accurate and the higher the power consumption, the fastest reading frequency is used, mainly considering that the swinging of the human arm may be fast, preventing no reaction, the code is as follows:
MyManger.registerListener(this,Mysensor1,SensorManager.SENSOR_DELAY_FASTEST)；
MyManger.registerListener(this,Mysensor2,SensorManager.SENSOR_DELAY_FASTEST)。
and then obtaining original data, wherein two methods are respectively an onsensorchanged (sensovevent event) and an onAccuracyChanged (Sensor, int accuracy) in the previously created senseverlistener object, and the former method and the latter method are used for high-precision data monitoring in the present embodiment. The SensorEvent object records the variation of the sensor data, and the raw data of the acceleration sensor is ternary, consisting of three float values, representing the relevant parameters on the X, Y and Z axes, respectively, stored in an array, accessed by the event.
And then, data processing is carried out, and because the data generated by the acceleration sensor contains the influence of the gravity acceleration, the invention only needs to collect the acceleration applied to the mobile phone by the human body, so that a low-pass filter is designed to eliminate the influence of the gravity acceleration. The low-pass filter is implemented as follows:
and T is the time constant of the filter and represents the time for the sensor to acquire once, T represents the frequency for the sensor to acquire data, and the filter coefficient alpha is obtained by T/(T + T).
Firstly, solving triaxial acceleration generated under the influence of gravity, and carrying out low-pass filtering:
gravity[0] =α * gravity[0] + (1 - α) * event.values[0];
gravity[1] = α* gravity[1]+ (1 - α) * event.values[1];
gravity[2] = α * gravity[2] + (1 - α) * event.values[2]。
then, the gravity acceleration is deducted from the original data, and the three-axis linear acceleration can be obtained:
linear_acceleration[0] = event.values[0] - gravity[0];
linear_acceleration[1] = event.values[1] - gravity[1];
linear_acceleration[2] = event.values[2] - gravity[2]。
the three axes, i.e., X, Y, Z axes, have positive and negative scores, and positive represents a scale, negative represents a scale, three axes represent six scales, and the remaining two scales are shared by one of the axes, e.g., Y axis, and are distinguished by the magnitude of the acceleration value, and the threshold value is set to 19 in the embodiment. Comparing the three axial linear acceleration values obtained by the previous calculation, wherein the maximum absolute value is the axial direction of the shaking of the mobile phone, the positive value is positive, the negative value is negative, in the specific implementation, a Y axis is defined by setting a second threshold (19) of the acceleration, four scales are multiplexed and distributed, corresponding to real-time acceleration data values >19, 19> data values >0, 0> data values > -19, -19> data values, and the specific scale distribution is shown in the attached figure 2 under four conditions.
Creating a SoundPool example, specifying the capacity as 8, corresponding to 8 scales, the first seven being basic scales Do, Re, Mi, Fa, So, La and Si, the 8 th being accent Do, loading the sound type as streaming audio, and recording the audio resource name and ID by using Map. Writing a function InitMusic () to load audio resources into a sound pool, marking key values for each resource, ensuring and indicating the completion of loading by using a monitoring event and a prompt box in order to ensure that all musical scale audios are loaded, and then writing an audio playing function playMusic (int index, float speed), wherein parameters of the function playMusic (int index, float speed) represent the identification and playing speed of the musical scale audios, and the speed is set as a default value and can be adjusted through a UI (user interface).
The detailed process of the application development of the smart phone is familiar to developers in the industry, and the detailed process of each programming development link is not specifically developed any more due to the fact that the existing development environment is easy to realize. Through tests, the musical scale playing device can accurately play each musical scale and is natural and interesting.
To avoid the occurrence of a polyphonic condition. The 'polyphonic' processing is perfectly designed. Through debugging and analysis, the data can be allowed to be sent as long as the acceleration reaches 15, the sensor can detect the acceleration for a plurality of times per second, when the acceleration reaches the sounding value 15, the state lasts for a short time, then the acceleration is reduced below 15, and the requirement of sending the data is met in the time when the acceleration is high, so that the data is continuously sent to the audio module, and the sound connection occurs. By taking reference to 'PV operation' in the process management of the operating system, a 'lock' is set and represented by a Boolean type, the 'lock' value is True at the beginning, when the acceleration reaches 15 and data is sent to the audio module, the 'lock' is False, the data sending of the sensor module is suspended, and when the acceleration value is smaller than a first threshold value (the fixed value is 5 in the embodiment), the shaking is stopped, the 'lock' value is set to True again, the next shaking is waited, and therefore 'one wave of one sound' is realized. The specific inter-module communication and APP architecture can be seen in FIGS. 3 and 4.
Based on the implementation of the principle technology, the specific application example of the method of the invention shows that the mode of promoting the smart phone to shake has diversity, and the movable parts in the limbs are not limited to arms, and are suitable for all age groups and even partial disabled people, so the method has wide practicability.
In the most basic principle application, a user holds or ties the smart phone on a wrist strap, and swings an arm to drive the smart phone to shake for sounding to form music, so that the smart phone is particularly suitable for arousing interest of children who know the westernness in playing.
Under the condition that the four limbs have sufficient activity or only the lower limbs flexibly move, the single-row acceleration sensor can be worn on shoes and socks or tied to the ankle, a data transmission channel is established with the smart phone through Bluetooth, and the single-row acceleration sensor is enabled to cooperatively sense with the acceleration sensor in the smart phone in a manner of corresponding to the arrangement of the expansion step two and the expansion step three of the single-row acceleration sensor; after a user holds or ties the smart phone on the wrist strap, the user dance the arm to drive the smart phone to rock and sound to be connected into music.
Besides four limbs driving the smart phone to shake, the selected sensor can be a gyroscope, angle change is established by referring to the example of the acceleration sensor in the second step and the third step to be associated with the action of shaking the smart phone, and the action is mapped to each scale respectively. The user binds the smart phone to the waist, and drives the smart phone to shake and sound through bending and twisting in all directions to be connected into music.
As a more advanced application example, for a user with strong music composing ability, the user can wear a single-row acceleration sensor on the foot, a single-row gyroscope is arranged on the waist, data transmission channels are established with the smart phone through Bluetooth, and the single-row acceleration sensor or the single-row gyroscope is correspondingly added to expand the steps II and III, so that the single-row acceleration sensor and the acceleration sensor in the smart phone cooperatively sense, and the range of the voice range is greatly expanded; after a user holds or ties the smart phone on the wrist strap, the user can drive the smart phone to shake and sound through the action combination of dance, foot dance, waist straightening and hip twisting to connect the smart phone with music.
In conclusion, the method for generating music by shaking the smart phone is described in detail in various aspects of technical principles, specific implementation methods and application cases, and the technical scheme of the invention has prominent substantive characteristics and remarkable progress: the method fully utilizes the sensor of the smart phone or expands the sensing hardware through the Bluetooth matching, reads the data sensed by the sensor through the simply developed APP and converts the data into the corresponding scale sounding, thereby being beneficial to stimulating the sensing and controlling ability of music when the user waves the smart phone, promoting interest and obtaining creation fun.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (4)
1. A method for generating music by shaking a smart phone is characterized by comprising the following steps:
the method comprises the following steps: selecting sensors corresponding to shake induction in the smart phone, wherein the selected sensors are an acceleration sensor and a gyroscope, holding or binding the smart phone to the waist in a hand, wearing the single-row acceleration sensor on shoes and socks or binding the single-row acceleration sensor to the ankle, or assembling the single-row gyroscope to the waist, and establishing a data transmission channel between the single-row gyroscope, the single-row acceleration sensor and the smart phone through Bluetooth;
step two: developing an application of a smart phone, constructing a sensor management object and a sensing monitoring management object in the smart phone by installing an APP, and acquiring original sensing data and classifying the data according to spatial parameters by calling two object access sensors, a single-row gyroscope and a single-row acceleration sensor to perform cooperative sensing by a processor of the smart phone;
step three: defining actions and scales, respectively corresponding the processed data to three spatial axes and two directions of each axis, defining one axis for multiplexing by setting a second threshold value of acceleration, judging the action of shaking the smart phone by comparing the maximum absolute value of three axial linear accelerations and the direction thereof, and correspondingly matching one scale; establishing angle change and association of actions of shaking the smart phone, mapping the actions to each scale respectively, and creating a sound pool and an audio playing object;
step four: the method comprises the steps that a first threshold value of lock and state switching of sensor data sending is preset in an APP, according to the detected states of shaking motion and lock of the smart phone, when acceleration reaches a sounding value, data can be sent and corresponding scales can be played, when the acceleration reaches the sounding value and the data are sent, data sending is suspended at a locking position, and when the acceleration falls to the first threshold value, data sending is allowed to be carried out at the locking position.
2. The method for producing music by shaking a smartphone according to claim 1, wherein: the method further comprises the step of selecting the type of the smart phone and the application development environment corresponding to the operating system of the smart phone before the step one.
3. The method for producing music by shaking a smartphone according to claim 1, wherein: the selected sensor is an acceleration sensor, the raw sensing data obtained in the step two comprises a gravity component, and the data processing further comprises a low-pass filter for eliminating the gravity component.
4. The method for producing music by shaking a smartphone according to claim 1, wherein: the user holds the smart phone by hand or ties the smart phone on the wrist strap, and swings the arm to drive the smart phone to shake and sound, so that the smart phone and the wrist strap are connected into music.
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| CN103885663A (en) * | 2014-03-14 | 2014-06-25 | 深圳市东方拓宇科技有限公司 | Music generating and playing method and corresponding terminal thereof |
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| CN103376918A (en) * | 2012-04-16 | 2013-10-30 | 联想(北京)有限公司 | Gravity sensing method and electronic equipment |
| CN103885663A (en) * | 2014-03-14 | 2014-06-25 | 深圳市东方拓宇科技有限公司 | Music generating and playing method and corresponding terminal thereof |
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