CN205920631U - Piano performance action detection circuitry of self -adaptation installation - Google Patents
Piano performance action detection circuitry of self -adaptation installation Download PDFInfo
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- CN205920631U CN205920631U CN201620161407.7U CN201620161407U CN205920631U CN 205920631 U CN205920631 U CN 205920631U CN 201620161407 U CN201620161407 U CN 201620161407U CN 205920631 U CN205920631 U CN 205920631U
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Abstract
The utility model discloses a piano performance action detection circuitry of self -adaptation installation, include the detection signal collector spare with musical instrument frame and key relatively fixed, signal collector spare is correlation formula and reflective infrared photoelectric device. The white key adopts reflective infrared photoelectric device, and the black key adopts the infrared photoelectric device of correlation formula. When white key was pressed, because white key and photoelectric device's distance changes, the infrared light signal of telecommunication power that photoelectric device received changed, carried CPU with this simulation that changes electricity signal transfer for the board and carried out subsequent processing, when the black key was pressed, the correlation formula infrared light signal of telecommunication changed, conveyed a board year CPU with the analog signal who changes and carried out subsequent processing. Key state information after the board carries the CPU processing sends the host computer to through wireless bluetooth and carries out further processing. The utility model discloses sensitive, accurate, the digitization of being convenient for as a result of reflection, it is with low costs, be convenient for promote on a large scale, and the utility model discloses a device communication is reliable, and the circuit consumption is little.
Description
Technical field
This utility model is related to music teaching equipment technical field, the piano performance that more particularly to a kind of self adaptation is installed
Motion detector circuit.
Background technology
Use the signal packaging being positioned over the correlation Photoelectric infrared switch form below key in the world at present
Put.The light shielding device that signal acquisition device is light emitting devices, light receiving element is connected with key.Described photoemissive device
The light shielding device being synchronized with the movement is disposed with key and light receiving element between.When playing piano, light emitting devices, light connect
Receive device and light shielding device and will produce break-make because of keyboard relative to the motion of qin frame, the photosignal that result light emitting devices sends or
Received or be blocked by photoelectric receiving device, the various keyboard action parameter such as state, duration will be played and switch to corresponding pulse
Digital signal, so that subsequent conditioning circuit and software processing, and testing result is exported.
Inventor's discovery when carrying out the present invention, the device of prior art has the disadvantage in that one is to install complexity, to peace
Dress required precision is very high, needs professional person to spend a lot of time installation and debugging, is unfavorable for promoting；Two is to destroy piano integrity,
Because below fingerboard to be arranged on, punch cabling and screw fixation etc. are needed on piano.
Content of the invention
(1) technical problem to be solved
The technical problems to be solved in the utility model is the piano performance motion detector circuit providing a kind of self adaptation to install,
To overcome prior art to install defect that is complicated, destroying piano integrity.
(2) technical scheme
In order to solve above-mentioned technical problem, this utility model provides the piano performance motion detection electricity that a kind of self adaptation is installed
Road, described circuit includes black key to penetrating testing circuit, white key reflection testing circuit, control circuit and power circuit；Described black key
To penetrate testing circuit and white key reflection testing circuit is connected with described control circuit respectively, described power circuit be described black key pair
Penetrate testing circuit, white key reflection testing circuit and control circuit to power；
Described black key is relatively fixed with qin frame and key to penetrating testing circuit, right with what black key matched including 35 groups
Penetrate formula infrared electro device, for gathering the status information of black key, and the status information of described black key is passed through red
Outer photosignal exports described control circuit；
Described white key reflection testing circuit is relatively fixed with qin frame and key, anti-with what white key matched including 49
Penetrate formula infrared electro device, for gathering the status information of white key, and the status information of described white key is passed through red
Outer photosignal exports described control circuit；
Described control circuit, according to the change of the infrared electro signal receiving, judges the action of key.
Wherein, the infrared light supply of described correlation infrared electro device and infrared light receiver are respectively fixedly disposed at black
On the opto-electronic sensor support of key both sides, described reflective infrared photoelectric device is fixedly installed on the photoelectricity above white key
On sensor stand；Described correlation infrared electro device and reflective infrared photoelectric device not with the action of key and action.
Wherein, to four groups of small character 35 of one group of big word are black with piano respectively for described 35 groups of correlation infrared electro devices
Color key corresponds；One group of big word is white to 49 of four groups of small character with piano respectively for described 49 reflective infrared photoelectric devices
Color key corresponds.
Wherein, described control circuit adopts stm8 single-chip microcomputer.
Wherein, described black key is directly accessed to the infrared electro signal penetrating testing circuit and white key reflection testing circuit output
Described stm8 single-chip microcomputer.
Wherein, also include indicating circuit, described indicating circuit is used for the action of button is indicated.
Wherein, using monochromatic led, described led is directly controlled described indicating circuit by the io pin of described stm8 single-chip microcomputer.
(3) beneficial effect
The piano performance motion detector circuit that self adaptation of the present utility model is installed possess piano key action in real time from
The basic function of dynamic detection, the problems such as solving piano study device and install inconvenient, reduces hardware cost, and easy to operate.
Assembly of the invention convenient, fast and accurate can realize the motion detection of piano key.Present invention reflection is sensitive, result is smart
Really, it is easy to digitized, low cost, circuit power consumption is little, be easy to promote on a large scale.
Brief description
Fig. 1 is a kind of structural representation of the piano performance motion detector circuit of self adaptation installation of this utility model embodiment
Figure；
Fig. 2 is the black key of this utility model embodiment to the circuit diagram penetrating testing circuit；
Fig. 3 is the circuit diagram of the white key reflection testing circuit of this utility model embodiment；
Fig. 4 is the circuit diagram of the control circuit of this utility model embodiment；
Fig. 5 is the circuit diagram of the indicating circuit of this utility model embodiment.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is used for this utility model is described, but is not limited to the scope of the present invention.
Structure such as Fig. 1 institute of the piano performance motion detector circuit that a kind of self adaptation of this utility model embodiment is installed
Show, described circuit includes black key to penetrating testing circuit, white key reflection testing circuit, control circuit and power circuit；Described black key
To penetrate testing circuit and white key reflection testing circuit is connected with described control circuit respectively, described power circuit be described black key pair
Penetrate testing circuit, white key reflection testing circuit and control circuit to power；
Described black key is relatively fixed with qin frame and key to penetrating testing circuit, right with what black key matched including 35 groups
Penetrate formula infrared electro device, for gathering the status information of black key, and the status information of described black key is passed through red
Outer photosignal exports described control circuit；
Described white key reflection testing circuit is relatively fixed with qin frame and key, anti-with what white key matched including 49
Penetrate formula infrared electro device, for gathering the status information of white key, and the status information of described white key is passed through red
Outer photosignal exports described control circuit；
Described control circuit, according to the change of the infrared electro signal receiving, judges the action of key.
The infrared light supply of described correlation infrared electro device and infrared light receiver are respectively fixedly disposed at black key
On the opto-electronic sensor support of both sides, described reflective infrared photoelectric device is fixedly installed on the photoelectric sensing above white key
On device support；Described correlation infrared electro device and reflective infrared photoelectric device not with the action of key and action, but light
Change in location with corresponding key is changed by the signal of telecommunication.Described 35 groups of correlation infrared electro devices big word one with piano respectively
35 black keys to four groups of small character for the group correspond；Described 49 reflective infrared photoelectric devices big word with piano respectively
One group of 49 white key to four groups of small character corresponds.This corresponding relation reflect the rhythm of action of key, speed of action with
And the information such as action dynamics.
In the present embodiment, black key to penetrate testing circuit as shown in Fig. 2 white key reflection testing circuit as shown in Figure 3.This enforcement
Example in black key to penetrate testing circuit and white key reflection testing circuit do not adopt operational amplifier chip lm324, simplify circuit,
Reduce power consumption.
Described control circuit, as shown in figure 4, adopting the stm8 single-chip microcomputer of high performance-price ratio, realizes infrared photoelectric digital signal
Obtain, process, the generation of key action data, described black key reflects the infrared of testing circuit output to penetrating testing circuit and white key
Photosignal is directly accessed described stm8 single-chip microcomputer.The manner of execution of described control circuit each key of real-time judge, and accordingly
Produce corresponding key action data stream in real time.
The piano performance motion detector circuit that described self adaptation is installed also includes indicating circuit, and it is right that described indicating circuit is used for
The action of button is indicated., using monochromatic led, described led is by described stm8 single-chip microcomputer for indicating circuit described in the present embodiment
Io pin directly control, its circuit is as shown in Figure 5.Prior art indicating circuit part adopts 2 display lamps, that is, red green double
Led, and be driven using tm1620 chip；The circuit of the present embodiment adopts 1 display lamp, i.e. monochromatic red led, type of drive
Eliminate tm1620 chip, reduce volume, reduce power consumption.
Process of realizing of the present utility model is that key action exports analogue signal via infrared sensor, according to this signal
Change processor judges the action of key.In the present embodiment, when piano, when white key is pressed, due to white qin
Key is changed with the distance of photoelectric device, and the infrared electro signal strength that photoelectric device receives changes, and this is changed
Analog electrical signal sends onboard cpu to and carries out subsequent treatment.When black key is pressed, correlation infrared electro signal occurs
Change, the analogue signal of change is sent to onboard cpu and carries out subsequent treatment.Detailed process is as follows:
It is illustrated in figure 25 pairs of correlation infrared tubes, for detecting the action situation of black key.When black key is pressed, to penetrating
The receiving terminal output low level of formula infrared tube, on the contrary export high level when black key lifts, and the situation of change according to level is with regard to energy
Judge the action situation of this black key.When the detection of this black key is pressed, corresponding display lamp is driven by mcu and lights；When this
Corresponding display lamp when lifting of black key detection is controlled by mcu and extinguishes.
It is illustrated in figure 37 to reflective infrared tube, for detecting the action situation of white key.When white key is pressed, reflection
The voltage of the receiving terminal output of formula infrared tube can raise, otherwise when white key is lifted, voltage can reduce, according to the change feelings of voltage
Condition just can judge the action situation of this white key.When the detection of this white key is pressed, corresponding display lamp is driven bright by mcu
Rise；When the detection of this white key is lifted, corresponding display lamp is controlled by mcu and extinguishes.
The piano performance motion detector circuit that self adaptation of the present utility model is installed possess piano key action in real time from
The basic function of dynamic detection, the problems such as solving piano study device and install inconvenient, reduces hardware cost, and easy to operate.
Assembly of the invention convenient, fast and accurate can realize the motion detection of piano key.Present invention reflection is sensitive, result is smart
Really, it is easy to digitized, low cost, circuit power consumption is little, be easy to promote on a large scale.
The above is only preferred implementation of the present utility model it is noted that common skill for the art
For art personnel, on the premise of without departing from this utility model know-why, some improvement can also be made and replace, these change
Enter and replace also to should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of self adaptation is installed piano performance motion detector circuit is it is characterised in that described circuit includes black key to penetrating inspection
Slowdown monitoring circuit, white key reflection testing circuit, control circuit and power circuit；Described black key to penetrate testing circuit and white key reflection detection
Circuit is connected with described control circuit respectively, described power circuit be described black key to penetrate testing circuit, white key reflection detection electricity
Road and control circuit are powered；
Described black key is relatively fixed with qin frame and key to penetrating testing circuit, including 35 groups of correlations matching with black key
Infrared electro device, for gathering the status information of black key, and the status information of described black key is passed through infrared light
Electric signal output is to described control circuit；
Described white key reflection testing circuit is relatively fixed with qin frame and key, reflective with what white key matched including 49
Infrared electro device, for gathering the status information of white key, and the status information of described white key is passed through infrared light
Electric signal output is to described control circuit；
Described control circuit, according to the change of the infrared electro signal receiving, judges the action of key；
Described control circuit adopts stm8 single-chip microcomputer；
Described black key is directly accessed described stm8 to the infrared electro signal penetrating testing circuit and white key reflection testing circuit output
Single-chip microcomputer；
Also include indicating circuit, described indicating circuit is used for the action of button is indicated；
Described indicating circuit is directly controlled by the io pin of described stm8 single-chip microcomputer using monochromatic led, described led.
2. self adaptation according to claim 1 is installed piano performance motion detector circuit it is characterised in that described to penetrating
The infrared light supply of formula infrared electro device and infrared light receiver are respectively fixedly disposed at the photoelectric sensor of black key both sides
On support, described reflective infrared photoelectric device is fixedly installed on the opto-electronic sensor support above white key；Described right
Penetrate formula infrared electro device and reflective infrared photoelectric device not with the action of key and action.
3. self adaptation according to claim 2 is installed piano performance motion detector circuit is it is characterised in that described 35
One group of big word, 35 black keys to four groups of small character correspond group correlation infrared electro device with piano respectively；Described
One group of big word to 49 white keys of four groups of small character correspond with piano respectively for 49 reflective infrared photoelectric devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620161407.7U CN205920631U (en) | 2016-03-02 | 2016-03-02 | Piano performance action detection circuitry of self -adaptation installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620161407.7U CN205920631U (en) | 2016-03-02 | 2016-03-02 | Piano performance action detection circuitry of self -adaptation installation |
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| Publication Number | Publication Date |
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| CN205920631U true CN205920631U (en) | 2017-02-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679142A (en) * | 2016-03-02 | 2016-06-15 | 大连佳音科技有限公司 | Piano playing motion detection apparatus with adaptive installation characteristic |
-
2016
- 2016-03-02 CN CN201620161407.7U patent/CN205920631U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679142A (en) * | 2016-03-02 | 2016-06-15 | 大连佳音科技有限公司 | Piano playing motion detection apparatus with adaptive installation characteristic |
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