CN216957424U

CN216957424U - Digital harmonica

Info

Publication number: CN216957424U
Application number: CN202220064254.XU
Authority: CN
Inventors: 赵平; 宋建平; 陈国斌; 杨宗华; 张维; 张鹏; 汤仁武
Original assignee: Ringway Tech Jiangsu Co ltd
Current assignee: Ringway Tech Jiangsu Co ltd
Priority date: 2021-03-16
Filing date: 2022-01-11
Publication date: 2022-07-12
Anticipated expiration: 2032-01-11
Also published as: CN217086123U; CN216957425U

Abstract

The utility model provides a digital harmonica which comprises a harmonica body, wherein a plurality of blowing ports are formed in the harmonica body, each blowing port is correspondingly provided with a blowing and sucking pressure sensor for sensing blowing and sucking pressure, and output signals of the blowing and sucking pressure sensors are serial digital signals. The utility model has reasonable structural design, the pressure transducer outputs serial digital signals, the digital signals have good stability and good anti-interference performance, and are easy to be received, processed and conducted, and the signal processing and the production debugging are more convenient and reliable.

Description

Digital harmonica

Technical Field

The utility model relates to the technical field of musical instruments, in particular to a digital harmonica.

Background

The traditional harmonica is a multi-reed small-sized playing instrument which makes metal reeds vibrate and sound by blowing or sucking air through a mouth. The traditional harmonica has small volume, long history and wide application. With technological advances, particularly with the gradual advances of sensors, digital technology and computing technology, traditional musical instruments are also gradually being electronized and digitalized. The traditional harmonica is also innovated to form an electronic harmonica. At present, the existing electronic harmonica adopts a blowing and sucking pressure sensor to obtain airflow and pressure change generated during playing. For example, in the existing digital harmonica DM48, the output signal of the blowing and sucking pressure sensor is an analog signal, and in actual use, the analog signal is easily interfered, the stability is poor, the signal processing and production debugging are complex, and an improvement space exists.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: in order to overcome the defects of the prior art, the utility model provides the digital harmonica which effectively improves the signal stability, is not easy to interfere with signals and is convenient and fast to process the signals, produce and debug.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a digital harmonica, includes the musical instrument body, has a plurality of mouthpiece on the musical instrument body, every mouthpiece all corresponds the pressure transducer that blows of being equipped with perception pressure of blowing and sucking, pressure transducer output signal be serial digital signal.

In the scheme, the digital harmonica adopts the blowing and sucking pressure sensor with the output signal being the serial digital signal, the signal conditioning, debugging and AD conversion are completed in the blowing and sucking pressure sensor, the serial digital signal is output by the blowing and sucking pressure sensor and can be directly transmitted to a subsequent microprocessor for processing, the analog circuit and the AD conversion are not needed, the signal transmission is more stable and reliable, and the subsequent signal processing and the production debugging are convenient.

Further, the body is also provided with a microprocessor, a MIDI sound source chip and a power circuit, the microprocessor receives the serial digital signals output by the blowing and sucking pressure sensor and transmits the processed signals to the MIDI sound source chip, and the power circuit is respectively electrically connected with the blowing and sucking pressure sensor and the MIDI sound source chip and supplies power to the blowing and sucking pressure sensor and the MIDI sound source chip.

Furthermore, in order to provide effective external amplification and amplified sound production of the effective sound source of digital harmonica, the musical instrument body on be equipped with speaker and power amplifier circuit, power amplifier circuit receives and handles the audio signal of MIDI sound source chip output, the speaker then receives the audio signal after power amplifier circuit handles and outwards raises loudly.

Furthermore, a human-computer interface is arranged on the musical instrument body, the human-computer interface is in signal connection with the microprocessor, the MIDI sound source chip, the loudspeaker and the power amplifier circuit respectively, and the human-computer interface is electrically connected with the power circuit. Through the arrangement of a human-computer interface, a platform is provided for the human-computer interaction and the selection of the MIDI sound source of the digital harmonica.

Still further, the human-computer interface is provided with a plurality of signal interfaces, and the signal interfaces are MIDI interfaces or USB interfaces or wireless Bluetooth interfaces or wireless 2.4G audio interfaces. Through the arrangement of the signal interface, the digital harmonica can conveniently transmit and exchange MIDI information and audio signals with the outside.

The digital harmonica has the advantages that the structural design is reasonable, the blowing and sucking pressure sensor outputs serial digital signals, the digital signals are good in stability and good in anti-interference performance, the digital signals are easy to receive, process and conduct, and the signal processing and production debugging are convenient and reliable.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural diagram of the preferred embodiment of the present invention.

In the figure 1, a body 2, a mouthpiece 3, a blowing and sucking pressure sensor 4, a circuit board 5, a microprocessor 6, a MIDI sound source chip 7, a power circuit 8, a loudspeaker 9, a power amplifier circuit 10, a man-machine interface 11 and a signal interface.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention, and directions and references (e.g., upper, lower, left, right, etc.) may be used only to help the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

The digital harmonica shown in fig. 1 is the best embodiment of the utility model. The digital harmonica includes a body 1. The body 1 is also provided with a circuit board 4, and the circuit board 4 is integrated with a microprocessor 5, a MIDI sound source chip 6, a power circuit 7, a loudspeaker 8, a power amplifier circuit 9 and a man-machine interface 10. To facilitate integration of the signals of the various integrated components on the circuit board 4. The power circuit 7 is respectively electrically connected with the blowing and sucking pressure sensor 3, the microprocessor 5, the MIDI sound source chip 6, the loudspeaker 8 and the power amplifier circuit 9, and the man-machine interface 10 is used for supplying power for the power circuit.

A plurality of blowing openings 2 are distributed on the musical instrument body 1, and each blowing opening 2 is correspondingly provided with a blowing and sucking pressure sensor 3 for sensing blowing and sucking pressure. The output signal of the blowing and sucking pressure sensor 3 is a serial digital signal. That is, the blowing and sucking pressure is directly output as a serial digital signal after being processed by the blowing and sucking pressure sensor 3, and the serial digital signal can be easily received, processed and conducted compared with an analog signal provided by the original electronic harmonica. The traditional electronic harmonica adopts a sensor to output an analog signal, the anti-jamming capability of the analog signal is poor, and a subsequent circuit is required to perform signal conditioning, debugging and ad conversion so as to convert the analog signal into a digital signal for processing by a CPU. In this embodiment, the pressure transducer 3 outputting serial digital signals is adopted, signal conditioning, debugging and AD conversion are completed inside the pressure transducer 3, and the serial digital signals output by the transducer can be directly transmitted to a microprocessor for processing without passing through an analog circuit and AD conversion. In order to ensure good effects in digital harmonica applications, the serial digital signals need to comply with the SPI standard or the 12C standard. The blowing and sucking pressure sensor 33 can be selected from BMP280, BMP180, HP203N, XGZP6878 and SPL 06-001.

The model of the microprocessor 5 can be ATmega328P or other models of microprocessors 5. The microprocessor 5 receives and processes the signals provided by the blowing and sucking pressure sensor 3 and the man-machine interface 10, and starts information data of processing results to the man-machine interface 10, the MIDI sound source chip 6 and the signal interface 11 after processing the signals. The MIDI sound source chip 6 is a SAM series chip of Dream corporation, france, and SAM2695 may be used specifically, or other MIDI sound source chips 6 may be used. The power amplifier circuit 9 has a digital function, and the specific model is XPT 8871. The chip type number of the power supply circuit 7 is an optional RT9193 and is used for supplying power to all circuits of the digital harmonica.

The man-machine interface 10 is in signal connection with the microprocessor 5, the MIDI sound source chip 6, the loudspeaker 8 and the power amplifier circuit 9 respectively, and the man-machine interface 10 is electrically connected with the power circuit 7. The human-machine interface 10 may be implemented by a commercially available input display module having a keypad, a multidirectional joystick and a display screen. The human-machine interface 10 is used for inputting and displaying information data. The man-machine interface 10 is provided with a plurality of signal interfaces 11, and the signal interfaces 11 are MIDI interfaces or USB interfaces or wireless Bluetooth interfaces or wireless 2.4G audio interfaces and are used for transmitting and exchanging MIDI information and audio signals between the digital harmonica and the outside. Through the arrangement of the human-computer interface 10, an effective carrying platform and a control platform are provided for the human-computer interaction and the selection of the MIDI sound source of the digital harmonica.

When the digital harmonica is played, the blowing and sucking pressure sensor 3 senses gas at the blowing port 2 and converts the pressure signal into a serial digital signal, the serial digital signal output by the blowing and sucking pressure sensor 3 is transmitted to the microprocessor 5, and the microprocessor 5 receives the signal, processes the signal and transmits the signal to the MIDI sound source chip 6. The power amplifier circuit 9 receives and processes the audio signal output by the MIDI sound source chip 6 and amplifies the audio signal, and the speaker 8 receives the audio signal processed by the power amplifier circuit 9 and then outputs the audio signal to the outside.

In the digital harmonica designed in the way, the signal output adopts the blowing and sucking pressure sensor 33 to output serial digital signals. Compared with the analog signal used by the original electronic harmonica, the digital signal has good stability, good anti-interference performance and easy receiving, processing and conducting. The directly output digital signal is more convenient and faster to process, and the production and debugging of the digital harmonica are more convenient and reliable.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a digital harmonica, includes the musical instrument body (1), has a plurality of mouthpiece (2) on the musical instrument body (1), and every mouthpiece (2) all correspond and are equipped with pressure transducer (3) that the perception is equipped with perception pressure of blowing and suction, its characterized in that: and the output signal of the blowing and sucking pressure sensor (3) is a serial digital signal.

2. The digital harmonica of claim 1, wherein: the pressure sensor comprises a microprocessor (5), a MIDI sound source chip (6) and a power circuit (7), wherein the microprocessor (5) receives serial digital signals output by the pressure sensor (3) and transmits the signals to the MIDI sound source chip (6) after processing, and the power circuit (7) is respectively electrically connected with the pressure sensor (3) and the MIDI sound source chip (6) and supplies power to the pressure sensor and the MIDI sound source chip.

3. A digital harmonica as claimed in claim 1, wherein: the musical instrument body (1) on be equipped with speaker (8) and power amplifier circuit (9), the audio signal of MIDI sound source chip (6) output is received and is handled in power amplifier circuit (9), speaker (8) then outwards are raised loudly after receiving the audio signal after power amplifier circuit (9) handle.

4. A digital harmonica as claimed in claim 3, wherein: the instrument body (1) is provided with a human-computer interface (10), the human-computer interface (10) is in signal connection with the microprocessor (5), the MIDI sound source chip (6), the loudspeaker (8) and the power amplifier circuit (9) respectively, and the human-computer interface (10) is electrically connected with the power supply circuit (7).

5. The digital harmonica of claim 4, wherein: the man-machine interface (10) is provided with a plurality of signal interfaces (11), and the signal interfaces (11) are MIDI interfaces or USB interfaces or wireless Bluetooth interfaces or wireless 2.4G audio interfaces.