CN204390723U - Based on piano key state-detection and the indicating device of light-inductive technology - Google Patents
Based on piano key state-detection and the indicating device of light-inductive technology Download PDFInfo
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- CN204390723U CN204390723U CN201420654631.0U CN201420654631U CN204390723U CN 204390723 U CN204390723 U CN 204390723U CN 201420654631 U CN201420654631 U CN 201420654631U CN 204390723 U CN204390723 U CN 204390723U
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Abstract
A kind of piano key state-detection based on light-inductive technology and indicating device, this device to piano without the need to repacking, do not contact key, directly be suspended in the top of piano key, utilize the light source of space outerpace just can be quick, convenient, accurately to carry out piano key state-detection and instruction; This device profile is the detection box that a bottom adopts the strip of convex-concave structure design, inner by photo sensor device, information process analysis circuit, and dual-colored LED pilot lamp forms; The detection box of bottom convex-concave particular design is closely pressed close to be suspended on above key by support, photo sensor device to unclamp at key key and the space detected bottom box and presses Light intensity and measure, testing circuit amplifies the light intensity signal detected, AD conversion and threshold values compare, and the result compared is uploaded to upper computer software and carry out application process; The signal that dual-colored LED pilot lamp on testing circuit receives upper computer software transmission carries out lighting of lamp and extinguishes process.
Description
Technical field
The utility model relates to a kind of piano key state-detection based on light-inductive technology and indicating device, belongs to Piano Teaching electronic assistance aids field.
Background technology
Current piano key state-detection has multiple detection patent and technology at home and abroad, as foreign patent US2004/003708A1 describe be a kind of employing to key surface emitting infrared light and by reflect or direct projection principle carries out the device of key state-detection; Domestic patent CN201946292U describes a kind of infrared tube that adopts and carries out the device of key state-detection by reflection to red light principle; Domestic patent CN203839026U describes a kind of device carrying out key state-detection based on magnetosensitive principle of induction.There is following shortcoming in above-mentioned patent pick-up unit: adopt infrared external reflection principle to there is diffuse reflection phenomenon due to infrared, in the detection occasion of super close distance, limited efficiency is even invalid, and piano key state-detection just belongs to the detection of super close distance; And adopt magnetosensitive principle of induction to need magnetic source is installed separately on key, need extra installation, the inconvenience of carrying movement can be caused.Simultaneously above-mentioned detection device due to detection means more, individual devices costly, causes the overall expenses of whole pick-up unit higher.
Summary of the invention
In order to solve the problem of said apparatus, the utility model provides a kind of simpler, more economical piano key state-detection and indicating device, this device to piano without the need to repacking, do not contact key, do not need, bottom pick-up unit, light source is installed, the top being directly suspended in piano key just can be quick, convenient, accurately to carry out piano key state-detection and instruction, and the signal data detected is uploaded to upper process.
The principle that the utility model solution key state detection technical matters is taked with scheme is: pick-up unit is designed to the strip box consistent with piano key length, cartridge bottom adopts concave-convex design, closely to press close to suspension with the piano black and white bond energy of convex-concave; Circuit board inside box comprises 88 road detecting units, and every road unit is responsible for the detection of a key.The photo sensor device of high sensitivity is installed, for detecting the change of the space light intensity between box and key bottom detecting unit.When key be do not press time, because key and detecting unit parallelly closely to press close to, it is approximate " unglazed " state that photo sensor device detects; When key is pressed, between key and detecting unit, space becomes large, external light source is dispersed and is reflexed in detection space, now photo sensor device detects " having light " state, the data sensed are carried out amplifier, AD conversion through detection cell circuit and are compared by photo sensor device, the data compared are sent to host computer, thus judges that key is pressed or non-down state.
Adopt and technique scheme, its principal feature is:
(1) whole pick-up unit profile is long consistent with piano key, the long strip type box of wide 20mm, high 30mm, and two ends are directly suspended on above piano key by support, do not need to fix, and person easy to use carries movement;
(2) comprise 88 tunnel detection cell circuit inside box, every road unit is responsible for the state-detection of a key;
(3) cartridge bottom is designed to concavo-convex structure according to the key type (white key or black key) detected, when object makes whole box be suspended in above piano, detect bottom box and coincide with the black and white bond energy close parallel of piano convex-concave, be consistent small space length;
(4) a high sensitive photo sensor device is installed, for detecting the light intensity in space between detecting unit and key bottom the detecting unit of every road;
(5) in the side of every road detecting unit near the person of playing the musical instrument, the light source fluorescent tube of a luminescence is downwards installed, is for detecting unit provides metastable detection light source at present, avoids the interference being subject to testing environment luminance brightness;
(6) data of the testing circuit on detecting unit to light-inductive device induction light intensity are amplified, AD conversion and threshold value compare, and the result compared is uploaded to upper computer software process.
(7) every road detecting unit is installed a dual-colored LED towards the front of the person of playing the musical instrument simultaneously and is referred to lamp, and detection cell circuit receives host computer and sends order and carry out lighting or extinguishing of pilot lamp, and double-colored is left hand or the right hand for mark.
The beneficial effects of the utility model are: this device adopts more simply more economical detection means, the action data that energy Real-time Collection is pressed to the person of playing the musical instrument each key or unclamped, and the smart electronics music score software uploaded on host computer carries out bullet puts accuracy and compare, thus music score software can be allowed automatically to give a mark to the accuracy of the person of playing the musical instrument and the prompting of bullet mistake, this device also can receive the instruction of host computer smart electronics music score software simultaneously, light the LED light on the detecting unit electronic music software play on the corresponding key of note, index is provided to help for the person of playing the musical instrument carries out button on piano.
Accompanying drawing explanation
Fig. 1 is pick-up unit profile and application scenarios simulation drawing.
Fig. 2 is pick-up unit concaveconvex structure design front section view.
Fig. 3 is the functional structure chart of pick-up unit.
Fig. 4 is detecting unit mechanical schematic diagram.
Fig. 5 is the response curve of pick-up unit photo sensor device when key state changes.
Embodiment
Fig. 1 illustrates between pick-up unit (1) and piano key (2) and host computer panel computer (3) in use scenes and relation, pick-up unit is suspended in the top of piano key by support, the bottom of pick-up unit adopts concavo-convex patten's design, thus can coincide mutually with the piano black and white bond energy of convex-concave and parallelly closely press close to suspension, the space between the key using pick-up unit and non-bullet to put as far as possible is in " unglazed " state.Pick-up unit and host computer carry out data transmission by wireless (4).
Fig. 2 illustrates the front section view of scale key (totally 7 white keys, a 5 black keys) scope in pick-up unit, and bottom of device is the design of convex-concave structure, C, D, E, F, G, A, B is position for installing white key detecting unit and width, C#, D#, F#, G#, A# are position for installing black key detecting unit and width, and whole bottom groove length is 8 ~ 10mm.
Fig. 3 illustrates the functional structure chart of pick-up unit, whole pick-up unit by with standard steel key (3) one to one black key detecting unit (2) or white key detecting unit (1) totally 88 detecting units form, wherein inverted concave is adopted to design bottom black key detecting unit, white key detecting unit adopts reversed convex type design, thus ensures that whole pick-up unit unanimously can closely press close to key suspension.
Fig. 4 illustrates the mechanical schematic diagram of single detecting unit, and detecting unit is by being detected key (1), pick-up unit box (2), and testing circuit plate (3), photo sensor device (4), stable detection is for light pipe (5), and LED light (6) forms.When key is in releasing orientation, because space between key and pick-up unit box is very tight, photo sensor device detects it is " unglazed " state; When key is in down state (1 '), space opening now between key and pick-up unit box leg-of-mutton angular region, from supplying the frequent diffusion of various light sources of light pipe and external environment condition or reflexing in this space, now photo sensor device detects " having light " state; The signal that photo sensor device detects amplifies by testing circuit, and AD conversion threshold value compare, and uploads in host computer and carries out application process.
Fig. 5 illustrate single detecting unit light-inductive device at key unclamping-press-testing circuit collects in release process again AD value change curve.In figure, t0 ~ t1 segment of curve is the luminosity AD value that key unclamps the light-inductive device do not pressed and measures, t1 ~ t2 segment of curve is the luminosity AD value that key light-inductive device when slowly pressing measures, and t2 ~ t3 segment of curve is the key luminosity AD value that light-inductive device measures when slowly unclamping.AD-H value is photaesthesia light device the highest AD threshold value when being pre-stored in that inside circuit board single-chip microcomputer, key unclamps, and AD-L scale mark is photaesthesia light device minimum AD threshold value when being pre-stored in that inside circuit board single-chip microcomputer, key is pressed completely.
Claims (4)
1. the piano key state-detection based on light-inductive technology and indicating device, profile is the detection box that a bottom adopts the strip of convex-concave structure design, detect in box and comprise 88 road detecting units, every road detecting unit is by photo sensor device, information process analysis circuit, stabilized light source supply pipe, dual-colored LED pilot lamp forms; It is characterized in that: the detection box of bottom convex-concave design is closely pressed close to be suspended on above key by support, detect photo sensor device bottom box to unclamp at key key and the space detected bottom box and measure with the change of pressing Light intensity, testing circuit amplifies the light intensity signal detected, AD conversion and threshold value compare, and the result compared is uploaded to upper computer software and carry out application process; The signal that dual-colored LED pilot lamp on testing circuit receives upper computer software transmission carries out lighting of lamp and extinguishes process.
2. the piano key state-detection based on light-inductive technology according to claim 1 and indicating device, is characterized in that: detect bottom box and adopt the fall concaveconvex structure design corresponding with the black and white key of convex-concave.
3. the piano key state-detection based on light-inductive technology according to claim 2 and indicating device, is characterized in that: bottom the detection box that each key is corresponding, install a photo sensor device, for detecting the state of this key.
4. the piano key state-detection based on light-inductive technology according to claim 1 and indicating device, is characterized in that: each detecting unit of one side detecting the person of playing the musical instrument faced by box installs a bi-colour LED; The instruction that dual-colored LED lamp receives host computer by control circuit is carried out lighting or extinguishing process, for pointing out the process that corresponding key needs bullet or puts of this lamp, and the left or right hand of different colours for pointing out correspondence to play the musical instrument of lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420654631.0U CN204390723U (en) | 2014-11-05 | 2014-11-05 | Based on piano key state-detection and the indicating device of light-inductive technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420654631.0U CN204390723U (en) | 2014-11-05 | 2014-11-05 | Based on piano key state-detection and the indicating device of light-inductive technology |
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| Publication Number | Publication Date |
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| CN204390723U true CN204390723U (en) | 2015-06-10 |
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| CN201420654631.0U Expired - Fee Related CN204390723U (en) | 2014-11-05 | 2014-11-05 | Based on piano key state-detection and the indicating device of light-inductive technology |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300251A (en) * | 2015-12-03 | 2016-02-03 | 广州珠江钢琴集团股份有限公司 | Piano key touch measuring block and piano key touch measuring method |
| CN105702120A (en) * | 2015-04-08 | 2016-06-22 | 易弹信息科技（上海）有限公司 | Piano sound collecting and broadcasting device and key calibration method |
| CN106952465A (en) * | 2017-03-15 | 2017-07-14 | 上海承歌网络科技有限公司 | A kind of piano key displacement detector |
| CN108053817A (en) * | 2017-10-27 | 2018-05-18 | 北京开心练教育科技有限公司 | A kind of keyboard instrument optical flame detector and signal output method |
| US10600399B2 (en) | 2016-01-15 | 2020-03-24 | Sunland Information Technology Co., Ltd. | Smart piano system |
| WO2023190197A1 (en) * | 2022-03-31 | 2023-10-05 | ソニーグループ株式会社 | Keyboard pushdown amount sensor device |
| JP7399250B1 (en) | 2022-12-05 | 2023-12-15 | わか子 飯塚 | Keyboard instrument practice aids |
-
2014
- 2014-11-05 CN CN201420654631.0U patent/CN204390723U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702120A (en) * | 2015-04-08 | 2016-06-22 | 易弹信息科技（上海）有限公司 | Piano sound collecting and broadcasting device and key calibration method |
| CN105300251A (en) * | 2015-12-03 | 2016-02-03 | 广州珠江钢琴集团股份有限公司 | Piano key touch measuring block and piano key touch measuring method |
| CN105300251B (en) * | 2015-12-03 | 2018-05-11 | 广州珠江钢琴集团股份有限公司 | The sub- sense of touch measuring block of piano key and the sub- sense of touch measuring method of piano key |
| US10600399B2 (en) | 2016-01-15 | 2020-03-24 | Sunland Information Technology Co., Ltd. | Smart piano system |
| US10636402B2 (en) | 2016-01-15 | 2020-04-28 | Sunland Information Technology Co., Ltd. | Systems and methods for automatic calibration of musical devices |
| US10950137B2 (en) | 2016-01-15 | 2021-03-16 | Sunland Information Technology Co., Ltd. | Smart piano system |
| US11328618B2 (en) | 2016-01-15 | 2022-05-10 | Sunland Information Technology Co., Ltd. | Systems and methods for calibrating a musical device |
| CN106952465A (en) * | 2017-03-15 | 2017-07-14 | 上海承歌网络科技有限公司 | A kind of piano key displacement detector |
| CN108053817A (en) * | 2017-10-27 | 2018-05-18 | 北京开心练教育科技有限公司 | A kind of keyboard instrument optical flame detector and signal output method |
| WO2023190197A1 (en) * | 2022-03-31 | 2023-10-05 | ソニーグループ株式会社 | Keyboard pushdown amount sensor device |
| JP7399250B1 (en) | 2022-12-05 | 2023-12-15 | わか子 飯塚 | Keyboard instrument practice aids |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Gan Maopeng Document name: Notification that Application Deemed not to be Proposed |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150610 Termination date: 20171105 |