CN103824554A - Electronic percussion instrument as well as non-contact-type sensor and signal detection method of electronic percussion instrument - Google Patents
Electronic percussion instrument as well as non-contact-type sensor and signal detection method of electronic percussion instrument Download PDFInfo
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- CN103824554A CN103824554A CN201410079110.1A CN201410079110A CN103824554A CN 103824554 A CN103824554 A CN 103824554A CN 201410079110 A CN201410079110 A CN 201410079110A CN 103824554 A CN103824554 A CN 103824554A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/0033—Recording/reproducing or transmission of music for electrophonic musical instruments
- G10H1/0041—Recording/reproducing or transmission of music for electrophonic musical instruments in coded form
- G10H1/0058—Transmission between separate instruments or between individual components of a musical system
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
- G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
- G10H1/043—Continuous modulation
- G10H1/045—Continuous modulation by electromechanical means
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H3/00—Instruments in which the tones are generated by electromechanical means
- G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
- G10H3/22—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using electromechanically actuated vibrators with pick-up means
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H2230/00—General physical, ergonomic or hardware implementation of electrophonic musical tools or instruments, e.g. shape or architecture
- G10H2230/005—Device type or category
- G10H2230/015—PDA [personal digital assistant] or palmtop computing devices used for musical purposes, e.g. portable music players, tablet computers, e-readers or smart phones in which mobile telephony functions need not be used
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
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- Electrophonic Musical Instruments (AREA)
Abstract
The invention discloses an electronic percussion instrument. The electronic percussion instrument comprises a grounded electric conduction percussion surface and a non-contact-type sensor, wherein the non-contact-type sensor comprises an oscillating circuit, an emitting end, a receiving end, a modulating circuit and an interface circuit; the oscillating circuit is used for generating an oscillating signal; the emitting end is used for emitting the oscillating signal and generating an alternating electric field, and the percussion surface is arranged in the alternating electric field so as to disturb the alternating electric field; the receiving end is used for coupling an alternating electric field so as to obtain a modulating signal; the modulating circuit is used for modulating the modulating signal from the receiving end; the interface circuit is used for outputting a demodulated signal. The sensor used by the invention is not required to be in contact with the percussion surface of the instrument without affecting the vibration performance of the instrument, and can improve the uniformity of vibration detection substantially. Because the percussion surface is adopted for achieving carrier modulation, the circuit structure of the sensor is simplified; the cost is reduced, and the anti-interference performance is improved; meanwhile, the invention also discloses a sensor and a signal detection method of the electronic percussion instrument.
Description
Technical field
The present invention relates to the technical field of electronic percussion instrument, relate more specifically to a kind of electronic percussion instrument and non-contacting sensor thereof and signal detecting method.
Background technology
Electronic percussion instrument, for example electronic drum, the mechanical signal that need to strike be produced by converter (sensor) be converted to electric signal but pick up into source of sound, and source of sound converts signal to required tone color, then becomes by audio amplifier or earphone the sound that people's ear can be heard.
Traditional electronic percussion instrument adopts following two kinds of modes to realize signal conversion conventionally: a kind of is to adopt the piezoelectric sensor that is core parts using piezoelectric ceramics as vibration detecting element, it is directly or indirectly contacted with the scope of attack of musical instrument, is sent to subsequent conditioning circuit processes to convert vibration signal to electric signal.Another kind is capacitance type sensor, it comprises two corresponding conductive electrodes, and wherein, a conductive electrode is installed on the back side of vibration plane (scope of attack), another conductive electrode is fixed on collets, and each conductive electrode is connected with respectively the wire of energising use.Two conductive electrodes energisings so that fill between the two with certain electric charge, when vibration plane vibrates because of strike, cause the variation of electric capacity, thereby utilize the variation of electric capacity to detect the vibration signal that vibration plane produces.
But all there is following shortcoming in above-mentioned two kinds of sensors: 1. inconvenience is installed; 2. interference free performance is poor; 3. just can measure because sensor all needs the vibration plane that touches directly or indirectly musical instrument, and contact will inevitably affect the vibration performance of musical instrument, the homogeneity of feel and vibration detection is hit in impact.
Given this, be necessary to provide a kind of electronic percussion instrument addressing the aforementioned drawbacks and non-contacting sensor and signal detecting method.
Summary of the invention
A technical matters to be solved by this invention is to provide a kind of convenient installation, the good non-contacting sensor of interference free performance, this non-contacting sensor converts electric signal to for the vibration signal that being tested surface is produced, and its input realizing has good homogeneity.
Another technical matters to be solved by this invention is to provide a kind of electronic percussion instrument with non-contacting sensor, and the input that this electronic percussion instrument is realized has good homogeneity.
Another technical matters to be solved by this invention is to provide a kind of signal detecting method of electronic percussion instrument, and the input that this signal detecting method is realized has good homogeneity.
In order to address the above problem, the invention provides a kind of non-contacting sensor, it comprises: an oscillatory circuit, for generation of an oscillator signal; One transmitting terminal, produces an alternating electric field for launching described oscillator signal, and described being tested surface is placed in described alternating electric field described alternating electric field is carried out to disturbance; One receiving end, it obtains a modulation signal for being coupled described alternating electric field; One demodulator circuit, the modulation signal for demodulation from described receiving end; And an interface circuit, for exporting the signal after demodulator circuit demodulation.
Preferably, described oscillatory circuit, demodulator circuit and interface circuit are all arranged on a circuit board, on described circuit board, protrude out two-plate, and described in two, pole plate forms respectively described transmitting terminal and receiving end.
Preferably, described in two, pole plate is parallel to each other and its centre distance is 1mm-100mm.
In order to address the above problem, the present invention also provides a kind of electronic percussion instrument, it comprises the conduction scope of attack and a non-contacting sensor of a ground connection, described non-contacting sensor is positioned at the below of the described conduction scope of attack to convert the conduction vibration signal that the scope of attack was produced to electric signal, described non-contacting sensor includes: an oscillatory circuit, for generation of an oscillator signal; One transmitting terminal, produces an alternating electric field for launching described oscillator signal, and the described conduction scope of attack is placed in described alternating electric field described alternating electric field is carried out to disturbance; One receiving end, obtains a modulation signal for being coupled described alternating electric field; One demodulator circuit, the modulation signal for demodulation from described receiving end; And an interface circuit, for exporting the signal after demodulator circuit demodulation.
Preferably, described conduction scope of attack support exhibition is on a shell, and described shell is external conductive casing or the shell with conductive shielding layer, and described non-contacting sensor is placed in described shell.
Preferably, described oscillatory circuit, demodulator circuit and interface circuit are all arranged on a circuit board, on described circuit board, protrude out two-plate, and described in two, pole plate forms respectively described transmitting terminal and receiving end.
Preferably, described in two, pole plate is parallel to each other and its centre distance is 1mm-100mm.
Preferably, the amplitude of described modulation signal is proportional to the distance between the described conduction scope of attack and described non-contacting sensor.
In order to address the above problem, the present invention also provides a kind of signal detecting method of electronic percussion instrument, and described electronic percussion instrument comprises the conduction scope of attack of a ground connection, and described signal detecting method comprises the following steps: (a), an oscillator signal is provided; (b), adopt one transmitting bring in transmitting described oscillator signal to produce an alternating electric field, the described conduction scope of attack is arranged in this alternating electric field; (c), by the described conduction scope of attack, described alternating electric field is carried out to disturbance; (d), adopt a reception to bring in the described alternating electric field of coupling and obtain a modulation signal; And (e), adopt a demodulator circuit described modulation signal is carried out to demodulation.
Preferably, in described step (a), the oscillator signal providing is sine wave signal, triangular signal or the square-wave signal that frequency is greater than 2KHz.
Compared with prior art, electronic percussion instrument provided by the present invention is realized the detection of musical instrument stroke signal by a non-contacting sensor, oscillatory circuit on sensor produces the oscillator signal of fixed frequency and brings in transmitting to produce alternating electric field by transmitting, the scope of attack of vibration exerts an influence to the distribution of electric field, receiving end obtains a modulation signal by coupling alternating electric field, this signal, by processing such as amplification, demodulation, can obtain the corresponding electric signal of vibration producing with the scope of attack.Above-mentioned carrier modulation mode can make a distinction useful signal and ground unrest from frequency spectrum, has greatly improved signal to noise ratio (S/N ratio), has good anti-interference.And because this non-contacting sensor is without contacting with the scope of attack of musical instrument, therefore can not affect the vibration performance of musical instrument self, can increase substantially the homogeneity of vibration detection.In addition, the present invention is realized by the scope of attack outside sensor due to carrier modulation is designed to, greatly simplified sensor circuit structure, reduce volume and reduce costs.Signal detecting method based on above-mentioned modulation and demodulation mode can high precision, anti-interference and realize at low cost the input of electronic percussion instrument.
By following description also by reference to the accompanying drawings, it is more clear that the present invention will become, and these accompanying drawings are used for explaining embodiments of the invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of electronic percussion instrument one embodiment of the present invention.
Fig. 2 is the structural representation of non-contacting sensor in electronic percussion instrument shown in Fig. 1.
Fig. 3 is the schematic block circuit diagram of electronic percussion instrument shown in Fig. 1.
Fig. 4 is the physical circuit block diagram of modulation circuit shown in Fig. 3.
Fig. 5 is the process flow diagram of signal detecting method one embodiment of electronic percussion instrument of the present invention.
The oscillogram producing after the carrier modulation of the conduction scope of attack during the signal detecting method that Fig. 6 a is electronic percussion instrument of the present invention detects.
Fig. 6 b is the oscillogram after signal demodulation shown in Fig. 6 a.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in embodiment is clearly and completely described, in accompanying drawing, similarly assembly label represents similar assembly.Obviously, below be only the present invention part embodiment by the embodiment of description, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 has shown an embodiment of electronic percussion instrument provided by the present invention, describes below with the electronic drum 10 shown in Fig. 1.With reference to Fig. 1, described electronic drum 10 comprises shell 110, the scope of attack 120 and non-contacting sensor 130.In certain embodiments, the described scope of attack 120 is fixed by web member 140 and is supportted and open up on shell 110, on the described scope of attack 120, be equipped with conductive mesh shape material and form the conduction scope of attack 120 and carry out ground connection, this conduction scope of attack 120 has certain dielectric property, and it exists can affect space electric field distribution.Preferably, described shell 110 adopts conductive material or makes and form a shielding cavity 150 with the compound substance of conductive shielding layer, and described non-contacting sensor 130 is placed in this shielding cavity 150 and converts electric signal to the vibration signal that the conduction scope of attack 120 is produced.Because whole inside cavity shields, in sensor 130 courses of work, can improve widely the signal to noise ratio (S/N ratio) of input and reduce musical instrument interference to external world.
With reference to Fig. 2 and Fig. 3, non-contacting sensor 130 of the present invention comprises a circuit board 130a, is provided with oscillatory circuit 131, transmitting terminal 132, receiving end 133, demodulator circuit 134 and interface circuit 135 on described circuit board.
In certain embodiments, described oscillatory circuit 131 is LC oscillatory circuit, and it is for generation of an oscillator signal.Described oscillatory circuit 131 is connected to apply oscillator signal to transmitting terminal 132 with described transmitting terminal 132.
In certain embodiments, on circuit board 130a, protrude out two pole plates of rectangular schistose texture roughly, on two-plate, be coated with metal level and form respectively described transmitting terminal 132 and receiving end 133.Described in two, pole plate is parallel to each other and a certain distance in space between the two.Particularly, the span of the centre distance D1 of two-plate is 1mm-100mm.In this preferred embodiment, this centre distance D1 value 30mm has good stiffness of coupling to guarantee transmitting terminal 132 and receiving end 133.As depicted in figs. 1 and 2, described transmitting terminal 132 produces an alternating electric field E for launching oscillator signal below the conduction scope of attack 120.Be subject to external force and produce when vibration at the conduction scope of attack 120, its vibration signal producing (being also the amplitude that the scope of attack produces) will produce disturbance to alternating electric field E.Described receiving end 133 is subject to the alternating electric field E after disturbance to produce a modulation signal through amplitude modulation(PAM) by coupling, and wherein, the amplitude of modulation signal is proportional to the distance B 2 between the scope of attack 120 and sensor 130.In the time that the scope of attack 120 moves down, the value of D2 diminishes, and signal amplitude diminishes; In the time that the scope of attack 120 moves up, it is large that the value of D2 becomes, and it is large that signal amplitude becomes.
Described demodulator circuit 134 is the modulation signal from described receiving end 133 for demodulation.In certain embodiments, described demodulator circuit 134 comprises a low noise pre-amplification circuit 134a, a narrow band filter 134b, a detecting circuit 134c and a low-frequency amplifier circuit 134d.Wherein, described low noise pre-amplification circuit 134a also introduces noise still less as far as possible for the modulation signal from receiving end 133 is amplified; Described narrow band filter 134b is for the noise beyond the carrier wave frequency range of decaying to improve the signal to noise ratio (S/N ratio) of signal, and described detecting circuit 134c is for extracting the envelope signal of modulation signal, and it can be realized by diode or triode; Described low-frequency amplifier circuit 134d is for amplifying envelope signal (vibration signal producing corresponding to the conduction scope of attack 120).
Described interface circuit 135 comprises that a power interface, ground interface and output interface are to be respectively used to connecting power supply, to carry out ground connection and the signal of output after demodulator circuit 134 demodulation.In certain embodiments, the mode that this interface circuit 135 can USB interface is connected with external circuit.
Meanwhile, the present invention also provides a kind of signal detecting method of electronic percussion instrument, and the specific implementation of the method is described as an example of above-mentioned electronic percussion instrument example below.With reference to Fig. 5, the detection method of some embodiment comprises the following steps:
First, provide an oscillator signal (step S1), this oscillator signal is provided by the oscillatory circuit 131 on sensor 130.The oscillator signal that some embodiment provides can proportion be greater than the waveform signals such as the sine wave signal, triangular wave, square wave of 2KHz to be realized, for cost-saving and raising antijamming capability, it is the sine wave signal of 1.78MHz that some embodiment preferentially selects frequency.Select this high-frequency oscillator signal to be conducive to from frequency spectrum, useful signal and ground unrest be made a distinction, greatly improve signal to noise ratio (S/N ratio).
Adopt a transmitting terminal 132 to launch described oscillator signal to produce an alternating electric field E(step S2), wherein, transmitting terminal 132 is realized by the transmitting pole plate of sensor 130, and oscillator signal launches to produce alternating electric field E by transmitting pole plate.
By the conduction scope of attack 120, described alternating electric field E is carried out to disturbance (step S3).Because the conduction scope of attack 120 exists certain dielectric property, there is the distribution that can affect space electric field in it.In the time that the scope of attack 120 vibrates, distance between itself and sensor 130 can change, thereby the alternating electric field E at place is produced to disturbance, this perturbation process has finally realized the amplitude modulation(PAM) to carrier signal (oscillator signal), as shown in Figure 6 a, the vibration signal that wherein curve C 1 produces for the scope of attack, C2 is the carrier signal after ovennodulation.
Adopt a receiving end 133 described alternating electric field E that is coupled, thereby obtain a modulation signal (step S4).Receiving end 133 is realized by the reception pole plate of sensor 130, because alternating electric field E has been subject to the disturbance of the conduction scope of attack 120, receiving end 133 is coupled in alternating electric field E can obtain a modulation signal, the amplitude of the modulation signal that receiving end 133 obtains is proportional to the distance between the scope of attack 120 and sensor 130, also,, in the time that the scope of attack 120 moves down, signal amplitude diminishes, in the time that the scope of attack 120 moves up, it is large that signal amplitude becomes.
Adopt a demodulator circuit 134 to carry out demodulation (step S5) to described modulation signal.Receiving end 133 sends to demodulator circuit 134 by received modulation signal and carries out signal processing.In this demodulator circuit 134, to be handled as follows modulation signal successively: carry out signal amplification and avoid as far as possible introducing noise, decay carrier wave frequency range noise in addition to improve the signal to noise ratio (S/N ratio) of signal, the envelope of extraction modulation signal, finally envelope signal is amplified.Through the processing of above-mentioned demodulator circuit 134, the vibration signal that the conduction scope of attack 120 produces will be converted into corresponding electric signal, as shown in the curve C 3 in Fig. 6 b.
As mentioned above, electronic percussion instrument provided by the present invention is realized the detection of musical instrument vibration signal by a non-contacting sensor, oscillatory circuit on sensor produces the oscillator signal of fixed frequency and brings in transmitting to produce alternating electric field by transmitting, the scope of attack of vibration exerts an influence to the distribution of electric field, receiving end obtains a modulation signal by coupling alternating electric field, this signal, by processing such as amplification, demodulation, can obtain the corresponding electric signal of vibration producing with the scope of attack.Above-mentioned carrier modulation mode can make a distinction useful signal and ground unrest from frequency spectrum, has greatly improved signal to noise ratio (S/N ratio), has good anti-interference.And because this non-contacting sensor is without contacting with the scope of attack of musical instrument, therefore can not affect the vibration performance of musical instrument self, can increase substantially the homogeneity of vibration detection.In addition, because non-contacting sensor of the present invention only designs oscillatory circuit, transmitting terminal, receiving end and demodulator circuit on a circuit board, carrier modulation is realized by the scope of attack outside sensor, simplified sensor circuit structure, reduce volume and reduce costs.Signal detecting method based on above-mentioned modulation and demodulation mode can high precision, anti-interference and realize at low cost the input of electronic percussion instrument.
In conjunction with most preferred embodiment, invention has been described above, but the present invention is not limited to the embodiment of above announcement, and should contain the various modifications of carrying out according to essence of the present invention, equivalent combinations.
Claims (10)
1. a non-contacting sensor, converts electric signal to for the vibration signal that being tested surface is produced, and it is characterized in that, described non-contacting sensor comprises:
One oscillatory circuit, for generation of an oscillator signal;
One transmitting terminal, produces an alternating electric field for launching described oscillator signal, and described being tested surface is placed in described alternating electric field described alternating electric field is carried out to disturbance;
One receiving end, obtains a modulation signal for being coupled described alternating electric field;
One demodulator circuit, the modulation signal for demodulation from described receiving end; And
One interface circuit, for exporting the signal after demodulator circuit demodulation.
2. non-contacting sensor as claimed in claim 1, it is characterized in that: described oscillatory circuit, demodulator circuit and interface circuit are all arranged on a circuit board, on described circuit board, protrude out two-plate, described in two, pole plate forms respectively described transmitting terminal and receiving end.
3. non-contacting sensor as claimed in claim 2, is characterized in that: described in two, pole plate is parallel to each other and its centre distance is 1mm-100mm.
4. an electronic percussion instrument, it is characterized in that: the conduction scope of attack and the non-contacting sensor that comprise a ground connection, described non-contacting sensor is positioned at the below of the described conduction scope of attack to convert the conduction vibration signal that the scope of attack was produced to electric signal, and described non-contacting sensor comprises:
One oscillatory circuit, for generation of an oscillator signal;
One transmitting terminal, produces an alternating electric field for launching described oscillator signal, and the described conduction scope of attack is placed in described alternating electric field and described alternating electric field is carried out to disturbance;
One receiving end, obtains a modulation signal for being coupled described alternating electric field;
One demodulator circuit, the modulation signal for demodulation from described receiving end; And
One interface circuit, for exporting the signal after demodulator circuit demodulation.
5. electronic percussion instrument as claimed in claim 4, is characterized in that: described conduction scope of attack support exhibition is on a shell, and described shell is external conductive casing or the shell with conductive shielding layer, and described non-contacting sensor is placed in described shell.
6. electronic percussion instrument as claimed in claim 4, is characterized in that: described oscillatory circuit, demodulator circuit and interface circuit are all arranged on a circuit board, on described circuit board, protrude out two-plate, and described in two, pole plate forms respectively described transmitting terminal and receiving end.
7. electronic percussion instrument as claimed in claim 6, is characterized in that: described in two, pole plate is parallel to each other and its centre distance is 1mm-100mm.
8. electronic percussion instrument as claimed in claim 4, is characterized in that: the amplitude of described modulation signal is proportional to the distance between the described conduction scope of attack and described non-contacting sensor.
9. a signal detecting method for electronic percussion instrument, described electronic percussion instrument comprises the conduction scope of attack of a ground connection, it is characterized in that, described signal detecting method comprises the following steps:
(a), provide an oscillator signal;
(b), adopt one transmitting bring in transmitting described oscillator signal to produce an alternating electric field, the described conduction scope of attack is arranged in this alternating electric field;
(c), by the described conduction scope of attack, described alternating electric field is carried out to disturbance;
(d), adopt a reception to bring in the described alternating electric field of coupling and obtain a modulation signal; And
(e), adopt a demodulator circuit to carry out demodulation to described modulation signal.
10. signal detecting method as claimed in claim 9, is characterized in that: in described step (a), the oscillator signal providing is sine wave signal, triangular signal or the square-wave signal that frequency is greater than 2KHz.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410079110.1A CN103824554A (en) | 2014-03-05 | 2014-03-05 | Electronic percussion instrument as well as non-contact-type sensor and signal detection method of electronic percussion instrument |
| PCT/CN2014/073374 WO2015131411A1 (en) | 2014-03-05 | 2014-03-13 | Electronic percussion instrument and contactless sensor thereof, and signal detection method |
| DE112014003706.0T DE112014003706B4 (en) | 2014-03-05 | 2014-03-13 | Electronic percussion instrument and associated non-contact sensor and associated method for signal detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410079110.1A CN103824554A (en) | 2014-03-05 | 2014-03-05 | Electronic percussion instrument as well as non-contact-type sensor and signal detection method of electronic percussion instrument |
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| CN103824554A true CN103824554A (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410079110.1A Pending CN103824554A (en) | 2014-03-05 | 2014-03-05 | Electronic percussion instrument as well as non-contact-type sensor and signal detection method of electronic percussion instrument |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103824554A (en) |
| DE (1) | DE112014003706B4 (en) |
| WO (1) | WO2015131411A1 (en) |
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| CN104019883A (en) * | 2014-06-18 | 2014-09-03 | 深圳市蔚科电子科技开发有限公司 | Electronic drum detection device and electronic drum detection method |
| WO2015192325A1 (en) * | 2014-06-17 | 2015-12-23 | 赵哲 | Detection device and detection method for electronic drum |
| CN108735191A (en) * | 2018-08-24 | 2018-11-02 | 张洋 | Contactless percussion instrument |
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| DE112014003706T5 (en) | 2016-05-12 |
| DE112014003706B4 (en) | 2018-10-25 |
| WO2015131411A1 (en) | 2015-09-11 |
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Application publication date: 20140528 |