CN210692053U - Key action recognition device - Google Patents
Key action recognition device Download PDFInfo
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- CN210692053U CN210692053U CN201921098785.5U CN201921098785U CN210692053U CN 210692053 U CN210692053 U CN 210692053U CN 201921098785 U CN201921098785 U CN 201921098785U CN 210692053 U CN210692053 U CN 210692053U
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Abstract
The utility model relates to a monitoring technology field, concretely relates to key action recognition device. A key motion recognition device comprises a support, an image acquisition unit and a central processing unit; the upper part of the bracket is provided with a locking mechanism; the image acquisition unit is arranged on the bracket; the central processing unit is in communication connection with the image acquisition unit. The utility model discloses key action recognition device, support upper portion has increased locking device, and installation locking back device is more firm, improves the discernment precision.
Description
Technical Field
The utility model relates to a monitoring technology field, concretely relates to key action recognition device.
Background
A piano is a common musical instrument in a key type musical instrument. The general audience cannot evaluate the performance level of the key instruments such as the player piano without professional knowledge. In the individual practice process, it is difficult for the performer to improve his or her training level without knowing his or her point of error.
At present, some key monitoring devices appear in the market, and the devices can monitor the action of keys, and then a processing system is used for processing the acquired data information to fulfill the aim of monitoring the action of the keys.
Chinese patent with publication number CN 109460743a and patent number 2018219308802 all disclose a key action recognition system, set up this system in the piano cabinet, through the monitoring of camera to the hammer action, reuse central processing unit carries out the picture processing, indirectly obtain the action condition of key, the mode of installing the sensor on traditional key with directly carry out the monitoring to the piano key has been abandoned, make the structure more simple, it is more convenient to install, and simultaneously, monitoring stability also very improves, do benefit to player's daily exercise, correct the mistake. However, the key action recognition system is not provided with a locking device, and the device is not installed stably enough, so that the recognition accuracy is influenced.
SUMMERY OF THE UTILITY MODEL
For solving the problem that exists among the above-mentioned background art, the utility model provides a key action recognition device, the device are equipped with locking mechanism, make the device installation more firm, and the mounting means is more nimble, improves the discernment precision, reduces the installation degree of difficulty.
The utility model provides a technical scheme of above-mentioned problem is: a key action recognition device is characterized in that:
comprises a bracket, an image acquisition unit and a central processing unit; the upper part of the bracket is provided with a locking mechanism;
the image acquisition unit is arranged on the bracket; the central processing unit is in communication connection with the image acquisition unit.
Further, the locking mechanism comprises an adhesive tape, and the key motion recognition device is fixed on the top cover of the piano cabinet by adhering the adhesive tape.
Further, the locking mechanism comprises a sucker, and the key motion recognition device is sucked on the top cover of the piano cabinet through the sucker to be fixed.
Further, above-mentioned locking mechanism includes first magnet and iron sheet, first magnet sets up the upper portion at the support, the iron sheet is used for producing the suction with first magnet cooperation, the upper surface of iron sheet is equipped with pastes the adhesive tape.
Furthermore, the locking mechanism comprises a first magnet and a second magnet, the first magnet is arranged on the upper portion of the support, the second magnet is used for being matched with the first magnet to generate attraction, and a sticking adhesive tape is arranged on the upper surface of the second magnet.
Further, the above-described key motion recognition apparatus further includes an illumination device provided on the support, the illumination device being configured to illuminate the image pickup unit.
Further, the image acquisition unit is a camera.
Further, the central processing unit comprises a CPU module, a DSP module, a memory module, and a USB interface.
The utility model has the advantages that:
the utility model discloses key action recognition device, support upper portion has increased locking device, and installation locking back device is more firm, improves discernment precision, and the mounting means is also more nimble, and the installation degree of difficulty reduces.
Drawings
Fig. 1 is a first embodiment provided by the present invention;
FIG. 2 is a mounting diagram of the embodiment one mounted on a piano;
FIG. 3 is a left side view of FIG. 2;
fig. 4 is a second embodiment provided by the present invention;
FIG. 5 is a mounting diagram of the second embodiment on a piano;
fig. 6 is a third embodiment provided by the present invention;
FIG. 7 is a mounting diagram of the third embodiment on a piano;
fig. 8 is a schematic structural diagram of a central processing unit in the key motion recognition device of the present invention.
Wherein: 1. a support; 2. an image acquisition unit; 3. a central processing unit; 4. pasting an adhesive tape; 5. a suction cup; 6. a first magnet; 7. iron sheets; 9. an illumination device.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-3, a key motion recognition apparatus includes a support 1, an image acquisition unit 2, a central processing unit 3; the upper part of the bracket 1 is provided with a locking mechanism; the image acquisition unit 2 is arranged on the bracket 1; the central processing unit 3 is in communication connection with the image acquisition unit 2.
As an embodiment of the utility model discloses the preferred, locking mechanism is including pasting adhesive tape 4, key action recognition device fixes on the musical instrument case top cap through pasting the adhesive tape. The adhesive strip 4 may be one or more pieces.
In the present invention, preferably, a lighting device 9 is provided below the stand 1; the image capturing unit 2 can be manually slid on the stand 1 to adjust the position.
The image obtaining unit 2 is for obtaining the images of hammers including the template images after the completion of the initialization of the hammers, the action images of the hammers.
Preferably, in this embodiment, the image acquiring unit 2 is a camera. Preferably, in this embodiment, the number of the cameras is four or five (other numbers of cameras are also possible). A total of 88 hammers are provided inside the piano cabinet for each key. These 88 hammers are mainly divided into 3 regions or 4 regions according to different piano types. Each region contains a part of the hammer, with a relatively large interval between the region and the region, and a relatively small interval between the hammer and the region.
In the present embodiment, the lighting device 9 is preferably an LED lamp.
Preferably, in this embodiment, referring to fig. 8, the central processing unit 3 includes a CPU module, a DSP module, a memory module, and other required circuit modules; the CPU module is used for calibrating and identifying the image acquired by the image acquisition unit 2; in the calibration and identification processes, the DSP module is mainly responsible for encoding and decoding video streams, accelerating image algorithm processing and the like. The central processing unit 3 further comprises a USB interface, a power module, a Bluetooth module or a wifi module and other sensor modules.
The central processing unit 3 is configured to process the image acquired by the image acquiring unit 2, and the central processing unit 3 employs a machine vision algorithm library opencv, which includes but is not limited to the opencv library, and may also be other machine vision algorithm libraries, which specifically include: and (4) calibrating and identifying.
The calibration is that: the image after completion of hammer initialization is extracted and stored, and serves as a comparison template. The identification means that: the hammer action images are extracted, and the hammer action images are compared with the above-mentioned comparison template to acquire the detected action information of the hammers.
Preferably, in the present embodiment, the extracting of the image at hammer initialization is specifically: extracting the hammers in the image by using a 'rectangle detection method' or a 'projection method' and other algorithms, numbering the extracted hammers, performing de-duplication processing, storing the position information of each hammer in a video frame, and storing each hammer as a comparison template.
Preferably, in the present embodiment, the comparing the hammer action images with the above-described comparison template is specifically: and comparing the frame difference between the hammer in each frame of the hammer action image and the corresponding template, judging the hammer motion when the difference value is greater than a set threshold value, and indirectly judging that the key corresponding to the identification block is pressed down.
Referring to fig. 2-3, when the embodiment of the present invention is installed, the whole device is located in the piano cabinet, and the light emitted from the lighting device 9 provides conditions for the monitoring of the camera to the hammer. When a user plays a keyboard, the motion of the keys can drive the hammers in the box body to move, and the camera shoots and monitors the front and back movement of the hammers in the working process. The camera takes an initial, action image of the hammer. Taking a piano model as an example, the overall length of the hammer array is about 130cm, and the device preferably has 4 cameras, numbered 1, 2, 3, 4. The height of the cameras from the hammers is about 16cm, the coverage range of each camera is about 42cm, and the coverage ranges of the cameras are all crossed. The numbers of the extracted hammer templates are subjected to a deduplication process, and finally all the hammer numbers are 1 to 88. Each hammer holds corresponding video frame position information.
Preferably, in one possible implementation manner of the present embodiment, the central processing unit 3 is further configured to obtain, according to the detected motion information of the hammers and the pre-stored hammer contrast templates, key motion conditions performed by the player, which are specifically: and coding the key serial number, the pressing state, the pressing time and other information, and comparing the information with the pre-stored standard motion information of the identification block to obtain the key motion condition played by the player. The key action condition of the player can be obtained by the correct and wrong playing condition of the player, and can be embodied to each note.
Preferably, in one possible implementation manner of the present embodiment, the central processing unit 3 is further configured to output a key motion situation performed by the player. The method specifically comprises the following steps: the central processing unit 3 transmits the key motion situation played by the player to a receiving device, which is a hardware device such as an ipad, an iphone, or an android mobile phone and a system hardware platform such as linux, unix, windows, and the like. The receiving device can check the key actions played by the player and correct or wrong conditions and the like through the display.
Example 2
Referring to fig. 4 and 5, embodiment 2 differs from embodiment 1 in that: the locking mechanism comprises a suction cup 5.
Preferably, the number of the suction cups 5 can be set according to actual conditions, and if the number of the suction cups is two, the suction cups 5 are respectively arranged on two sides. If the number of the suction cups is three, the suction cups 5 are respectively disposed at both sides and the middle of the supporter 1. The key action recognition device is sucked on the top cover of the piano cabinet through a sucker to be fixed.
Example 3
Referring to fig. 6 and 7, embodiment 3 differs from embodiment 1 in that: locking mechanism includes first magnet 6 and iron sheet 7, first magnet 6 is fixed on the upper portion of support 1, iron sheet 7 is used for producing suction with 6 cooperations of first magnet, the upper surface of iron sheet 7 is equipped with pastes adhesive tape 4, the iron sheet bonds in advance on the musical instrument case top cap through pasting adhesive tape 4, then fixes the device on the musical instrument case top cap through the magnetic attraction between first magnet 6 and the iron sheet.
Example 4
Example 4 differs from example 1 in that: locking mechanism includes first magnet 6 and second magnet, first magnet 6 sets up the upper portion at support 1, the second magnet is used for producing suction with first magnet 6 cooperation, the upper surface of second magnet is equipped with pastes adhesive tape 4. The second magnet is glued on the top cover of the piano cabinet in advance through the adhesive tape 4, and then the device is fixed on the top cover of the piano cabinet through the magnetic attraction between the first magnet 6 and the second magnet.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related system fields are included in the patent protection scope of the present invention.
Claims (9)
1. A key action recognition device, its characterized in that:
comprises a bracket (1), an image acquisition unit (2) and a central processing unit (3); the upper part of the bracket (1) is provided with a locking mechanism;
the image acquisition unit (2) is arranged on the bracket (1); the central processing unit (3) is in communication connection with the image acquisition unit (2); the central processing unit (3) is arranged on the bracket (1).
2. A key motion recognition apparatus according to claim 1, characterized in that: the locking mechanism comprises an adhesive tape (4).
3. A key motion recognition apparatus according to claim 1, characterized in that: the locking mechanism comprises a suction cup (5).
4. A key motion recognition apparatus according to claim 3, characterized in that: the number of the suckers (5) is at least three.
5. A key motion recognition apparatus according to claim 1, characterized in that: locking mechanism includes first magnet (6) and iron sheet (7), first magnet (6) set up the upper portion in support (1), iron sheet (7) are used for producing suction with first magnet (6) cooperation, the upper surface of iron sheet (7) is equipped with pastes adhesive tape (4).
6. A key motion recognition apparatus according to claim 1, characterized in that: locking mechanism includes first magnet (6) and second magnet, first magnet (6) set up the upper portion at support (1), the second magnet is used for producing suction with first magnet (6) cooperation, the upper surface of second magnet is equipped with pastes adhesive tape (4).
7. A key motion recognition apparatus according to any one of claims 1 to 6, wherein: the key motion recognition device further comprises an illumination device (9), wherein the illumination device (9) is arranged on the support (1), and the illumination device (9) is used for providing illumination for the image acquisition unit (2).
8. A key motion recognition apparatus according to claim 7, characterized in that: the image acquisition unit (2) is a camera.
9. A key motion recognition apparatus according to any one of claims 1 to 6, wherein: the central processing unit (3) comprises a CPU module, a DSP module, a memory module and a USB interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921098785.5U CN210692053U (en) | 2019-07-15 | 2019-07-15 | Key action recognition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921098785.5U CN210692053U (en) | 2019-07-15 | 2019-07-15 | Key action recognition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210692053U true CN210692053U (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921098785.5U Active CN210692053U (en) | 2019-07-15 | 2019-07-15 | Key action recognition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210692053U (en) |
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2019
- 2019-07-15 CN CN201921098785.5U patent/CN210692053U/en active Active
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20201208 Address after: No.116, chengjiazhuang, Fengming village, shangsong Township, Fufeng County, Baoji City, Shaanxi Province 722299 Patentee after: Cheng Yajun Address before: 100080 Beijing Haidian District Haidian Town West Street 72 No. 1 Building 2 Floor B40 Patentee before: BEIJING DUOMI DASHI TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210610 Address after: No.21b workshop, No.10 dongliushan street, Yingbin Road, Yanjiao Development Zone, Sanhe City, Langfang City, Hebei Province 065200 Patentee after: Sanhe Yihui Technology Co.,Ltd. Address before: No.116, chengjiazhuang, Fengming village, shangsong Township, Fufeng County, Baoji City, Shaanxi Province 722299 Patentee before: Cheng Yajun |
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| TR01 | Transfer of patent right |