CN102693657A

CN102693657A - Automatic correcting device for piano-playing hand gestures

Info

Publication number: CN102693657A
Application number: CN2012101800058A
Authority: CN
Inventors: 唐敏
Original assignee: Dalian Vocational and Technical College
Current assignee: Dalian Vocational and Technical College
Priority date: 2012-06-04
Filing date: 2012-06-04
Publication date: 2012-09-26

Abstract

The invention discloses an automatic correcting device for piano-playing hand gestures, which is composed of a fixing part, a supporting part, a detection part, a judgment part and a prompting part, wherein the fixing part is an elastic band; the shape of the supporting part can ensure that the hand gesture of a player is kept in a half-round ball-holding shape; the detection part is a camera, and arranged in the middle of the bottom surface of the supporting part; the judgment part is a microprocessor circuit, and arranged in the supporting part; and the prompting part is a vibrating device. Compared with the prior art, the automatic correcting device disclosed by the invention has obvious advantages which are mainly shown as follows: through the fixation and testing of four key points, the device can automatically judge whether the hand gesture of a player is correct, and through a prompting method, urges the player to consciously correct the incorrect hand gesture, in such a way, the hand gesture control ability of the player can be improved, and the understanding of the player in correct hand gestures can be improved, therefore, by using the device, an effect of getting twofold results with half the effort can be achieved for beginners to master correct piano-playing hand gestures.

Description

Piano hand-type automatic straightening device

Technical field the present invention relates to a kind of device of the hand-type that can correct a mistake, especially a kind of piano hand-type automatic straightening device that can automatic straightening player hand-type.

It is one of basic training of piano playing that background technology is grasped correct hand-type, for the beginner, and small children especially; The exercise of hand-type control ability is a uninteresting process, overemphasizes hand-type and can cause children to be weary of experienced qin, if but the exercise of emphasical hand-type; Grasp correct hand-type, will certainly influence playing of piano in the future, existing piano hand-type correcting device is single; And all be plant equipment; Be installed on the piano through mechanical hook-up, restriction player's wrist height is to reach the purpose of correcting hand-type.This can be corrected to a certain extent year begins to learn the piano person forces down the problem of wrist, but for small children, can exist highly unadjustable; Problems such as excessive height; And the limited length of plant equipment can limit while playing, and at present; Still lack a kind of automatic player piano hand-type correcting device, be not easy to less child of age and when begining to learn piano playing, grasp correct hand-type.

Summary of the invention is in view of the problem of being deposited in the above-mentioned prior art, the object of the present invention is to provide a kind of device that can automatic straightening piano playing person hand-type, grasps the correct hand-type of playing piano with convenient young beginner.

The correct hand-type of playing piano requires as follows:

(1) hand form semicircular hold spherical;

(2) first, second joint and the metacarpal joint of finger should be given prominence to;

(3) wrist must not be lower than key or master-hand's palm.

Requirement according to above-mentioned three bases; The present invention is fixing 4 of player's hand-type key points mainly: first joint of finger, finger second joint, metacarpal joint and wrist, confirm with relation whether player's hand-type is correct according to the shape that four key points form.

To achieve these goals, the present invention is made up of fixed part, support portion, test section, judging part and prompting part, and described fixed part is an elastic webbing; It is spherical that described support portion shape can guarantee that player's hand-type remains on into holding of semicircle; First, second joint and the metacarpal joint that guarantee finger are outstanding; Guarantee that metacarpal joint is higher than first joint and the wrist of finger; Guarantee that the player points first joint, metacarpal joint and triangulo column of wrist formation, the plane that the second joint of assurance finger and first joint are constituted and the angle of vertical plane are about 15 degree, and crossing with the triangulo column of finger first joint, metacarpal joint and wrist formation; Described test section is a camera, is positioned at bottom surface, support portion midway; Described judging part is a microcontroller circuit, is positioned at the inside of support portion; Described prompting part is a vibrating device, and affixed with the support portion; The bottom surface level of prompting part and support portion.

During use, can fixed part be fixed on the metacarpal joint place of palm, so that place the centre of the palm of palm to locate the support portion; The support portion is used to keep the hemispheric hand-type of player; Test section detects player's wrist key point through the short distance distance measuring sensor; Judging part confirms according to the detected key view data of test section whether player's hand is higher than key; The prompting part points out the player to correct hand-type according to judgment result through the mode of vibration.

The present invention compared with prior art, advantage is conspicuous, mainly shows:

1, can judge automatically through the fixing and detection of 4 key points whether player's hand-type is correct; And through the prompting method supervise the incorrect hand-type of the conscious correction of player; Not only can improve player's hand-type control ability; Can also improve the understanding of player's correct hand-type, grasp correct piano playing hand-type, can reach the effect of getting twice the result with half the effort for the beginner.

2, simple in structure, be easy to produce, make things convenient for the beginner to break through to be difficult to grasp the difficulty of correct hand-type, have good market outlook.

Description of drawings Fig. 1 is an one-piece construction synoptic diagram of the present invention.

Fig. 2 correctly plays hand-type key point key diagram for the present invention.

Fig. 3 correctly plays the vertical view of hand-type for the present invention.

Fig. 4 correctly plays hand-type key point graph of a relation for the present invention.

Fig. 5 is a microprocessor software processing flow chart of the present invention.

Embodiment: in piano hand-type automatic straightening device synoptic diagram shown in Figure 1, comprise fixed part 1, support portion 2, test section 3, judging part 4 and prompting part 5, described fixed part is an elastic webbing; It is spherical that described support portion shape can guarantee that player's hand-type remains on into holding of semicircle; The first joint A, second joint B and the metacarpal joint C that guarantee finger are outstanding; Guarantee that metacarpal joint is higher than first joint and the wrist D of finger; Guarantee that the player points first joint, metacarpal joint and wrist and constitutes a triangulo column; The plane that the second joint of assurance finger and first joint are constituted and the angle of vertical plane are about 15 degree, and crossing with the triangulo column of finger first joint, metacarpal joint and wrist formation; Described test section is a camera, is positioned at bottom surface, support portion midway; Described judging part is a microcontroller circuit, is positioned at the inside of support portion; Described prompting part is a vibrating device, and affixed with the support portion, the bottom surface level of prompting part and support portion.

From Fig. 2, can analyze; Second joint of finger is higher than first joint and the wrist of finger; Wrist is higher than key, and in order to prevent the phenomenon that folding refers in the process of playing, to occur, the plane that first joint of finger and second joint constitute and the angle of vertical plane are about 15 degree; Wherein, the second joint of not considering to point and the relation of metacarpal joint because in the process of playing, require height to raise one's hand thrum when playing, and the second joint of finger will be higher than metacarpal joint; The second joint of relevant finger only considers whether be about 15 degree with the plane of first joint formation and the angle of vertical plane.

From Fig. 3, can analyze: first joint of four fingers is on a curve, and the second joint of finger is on a curve, and the metacarpal joint of palm is on a curve.

According to above-mentioned analysis; Can draw in conjunction with Fig. 4; Correct player's hand-type should be: the player points first joint, metacarpal joint and wrist and constitutes a triangulo column; Plane that the second joint of finger and first joint constitute and triangulo column intersect, and the angle of plane that constitutes and vertical plane is about 15 degree.

During use, can fixed part be mounted on the metacarpal joint place, test section can obtain the image of fingerboard, and the main composition of entire image is the slit between key and the key, the key color is a white, and slit between two keys is a black; The microcontroller circuit of judging part is used for judging whether player's wrist is higher than fingerboard: at first be partitioned into key from image, obtain the key profile, measure the width of key.If width is greater than preset threshold then think that player's wrist is lower than key, the Vib. of prompting part is started working, and reminds the player to adjust hand-type.

Embodiment 1: combine Fig. 5 to describe, for example, the user has worn piano hand-type automatic straightening device, but the phenomenon that wrist is lower than key occurs;

In step S1, the camera of test section obtains the key image.

In step S2, judging part at first splits key according to feature of image.The characteristics of key image: gray-scale value is a key near the large area region of white, and the gray-scale value in the slit between key and the key is a black, key to the area grayscale value at piano edge near black, the clear-cut of fingerboard and one-tenth rectangle.

In step S3, the key profile information that obtains among the step S2 is preserved and is calculated the width of key.Said here width is not the key developed width, but through the key width that camera obtains, is the key width with respect to camera, therefore is called the key relative width here.For key, camera is movable, is the activity direction that can reflect player's wrist.When player's wrist moves to key, even when being lower than key, the relative width of key will increase; When player's wrist does not move to key, the basic maintenance when parallel with key,, the relative width of key will be constant.

In step S4, key relative width that calculates gained among the step S3 and setting threshold are compared, judge whether greater than setting threshold.When the player correctly plays, wrist should with the basic keeping parallelism of fingerboard, this moment, the key relative width that obtains was exactly a preset threshold.When player's wrist moves to key, even when being lower than key, the relative width of key will increase, will be greater than setting threshold.

In step S5,, the low excessively mistake of wrist occurs and play hand-type because the relative width of in step S4, judging key explains that greater than setting threshold player's wrist moves to key.

In step S6, cross when low and need wrist be raised playing wrist through the vibration prompt player.

Claims

1. a piano hand-type automatic straightening device is made up of fixed part, support portion, test section, judging part and prompting part, and it is characterized in that: described fixed part is an elastic webbing; It is spherical that described support portion shape can guarantee that player's hand-type remains on into holding of semicircle; First, second joint and the metacarpal joint that guarantee finger are outstanding; Guarantee that metacarpal joint is higher than first joint and the wrist of finger; Guarantee that the player points first joint, metacarpal joint and wrist constitutes a triangulo column, guarantee that second joint and first joint of finger constituted the angle of plane and vertical plane be about 15 degree, and the triangulo column that constitutes with finger first joint, metacarpal joint and wrist is crossing; Described test section is a camera, is positioned at bottom surface, support portion midway; Described judging part is a microcontroller circuit, is positioned at the inside of support portion; Described prompting part is a vibrating device, and affixed with the support portion.

2. a kind of piano hand-type automatic straightening device according to claim 1 is characterized in that: the bottom surface level of prompting part and support portion.