Portable electronic percussion instrument

Abstract

The utility model provides a portable electronic percussion instrument, including frame body, at least two percussion pad, strike sensor and crosstalk sensor. Percussion pad is connected with frame body through elastic fixed part, strike sensor is configured at the back of percussion pad, and crosstalk sensor and strike sensor are arranged on frame body. The high-precision determination of the knocking position and the strength is realized through the detection of the signal time difference or amplitude ratio of both, and the crosstalk interference between the percussion pads is effectively inhibited. The utility model is compact and portable, and is applicable to electronic music performance and teaching scene.

Description

Technical Field

[0001] This utility model relates to a portable electronic percussion instrument, belonging to the field of musical instrument technology, and particularly to an electronic percussion instrument with efficient strike detection and crosstalk suppression functions. Background Technology

[0002] Known portable electronic percussion instruments typically contain multiple pads mounted on the same frame. When a player strikes one pad, the resulting vibration is transmitted through the frame to the other pads, causing them to misfire.

[0003] A percussion pad typically includes a vibration sensor to detect whether it has been struck. This sensor is usually located in the center of the pad, which is much larger than the sensor itself. Therefore, when a performer strikes the center and perimeter of the pad with the same force, the signal in the center will be stronger than at the edges, resulting in an uneven volume. As described in patent document CN218333105U, a method to improve signal balance is to use a gradually increasing thickness on the striking surface, but this results in an unsightly appearance, with the center of the striking surface being thicker than the outer edge.

[0004] Furthermore, because portable electronic percussion instruments are equipped with multiple percussion pads, when one pad is struck, the vibration is transmitted to the other pads, resulting in crosstalk. As described in the patent document with publication number CN113053340A, pressure-sensitive sensors and piezoelectric sensors are used to check the position of the percussion pad being struck and to reduce crosstalk; however, pressure-sensitive sensors have the disadvantages of high cost and large signal drift. Utility Model Content

[0005] The purpose of this invention is to provide a portable electronic percussion instrument to solve the technical problem of crosstalk between percussion pads, thereby improving the detection accuracy of percussion signals.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A portable electronic percussion instrument, comprising: The frame consists of an upper shell and a lower shell; At least two impact pads are mounted on the frame; The upper shell is provided with mounting seats corresponding to the number of impact pads; A first sensor assembly is used to detect the vibration of the impact pad; One or more second sensor components are configured on the frame for detecting vibrations of the frame.

[0007] Preferably, each of the impact pads includes an impact pad support and an impact pad striking part, wherein the impact pad striking part is connected to the impact pad support.

[0008] Preferably, the support part of the striking pad is made of a material with a certain rigidity, and the striking part of the striking pad is integrally formed of an elastic material.

[0009] Preferably, the first sensor assembly is disposed on the back of the impact pad support and includes an impact vibration sensor. Preferably, the second sensor assembly includes a crosstalk vibration sensor.

[0010] Preferably, the impact pad includes an impact surface and a buffer portion, the buffer portion being located between the impact surface and the mounting base, and the impact surface being composed of a mesh breathable material.

[0011] Preferably, the system includes a signal processing module on the circuit board within the housing, used to analyze the ratio and / or difference between the measurement data of the first sensor assembly and the second sensor assembly over a certain period of time to determine whether the signal generated by the first sensor assembly is caused by the impact of the impact pad. This invention has the following beneficial effects: This invention uses two vibration sensors to effectively reduce crosstalk in an integrated electronic musical instrument with multiple percussion pads, improve the signal amplitude balance when the percussion pads are struck with the same force, and accurately determine the striking position of the percussion pads, thereby providing an electronic percussion instrument that simulates acoustic percussion instruments. Attached Figure Description

[0012] Figure 1 This is a perspective view of the entire machine in Example 1; Figure 2 This is a partial cross-sectional view of the impact pad in Example 1; Figure 3 Schematic diagram of other locations of the second sensor in Example 1; Figure 4 This is an exploded view of the impact pad in Example 1; Figure 5 This is a schematic diagram of the complete machine in Example 1; Figure 6 This is a partial cross-sectional view of embodiment 2 of the impact pad; Detailed Implementation

[0013] The present invention will be further described below with reference to specific embodiments. It should be noted that the present invention is not limited to the following embodiments, and all equivalent modifications or substitutions made within the scope of the ideas and claims proposed in this patent should be covered by the protection scope of this patent.

[0014] Example 1, as referenced Figures 1 to 5Embodiment 1 provides a portable electronic percussion instrument, including a frame 1 and at least two percussion pads 2. The frame 1 is formed by sealing an upper shell 11 and a lower shell 12 using conventional assembly methods (such as snap-fit ​​connections, screw fixation, etc.), and forms an internal cavity for accommodating electronic components. The upper surface of the upper shell 11 has protruding mounting seats 111 corresponding to the number of percussion pads 2. The mounting seats 111 are arranged in a matrix and are spaced apart from each other. This spacing design can effectively reduce the transmission of vibrations between adjacent percussion pads 2 during striking. It also includes a first sensor assembly 3 for detecting the vibration of the percussion pads 2; and one or more second sensor assemblies 4 (crosstalk sensors) disposed on the frame 1 for detecting the vibration of the frame 1.

[0015] The striking pad 2 has a two-layer structure, consisting of a lower striking pad support 21 and an upper striking pad 22, which are connected together. The striking pad support 21 is made of a rigid material, such as iron, steel, or hard plastic, and its function is to provide a stable support frame for the striking pad 2, preventing structural deformation caused by long-term striking. The striking pad 22 is integrally molded from an elastic material (such as rubber or silicone), and has a striking pad fixing part 221 and a striking pad buffer part 222 on its back side facing the striking pad support 21. The striking pad fixing part 221 is a cylindrical protrusion that corresponds one-to-one with the mounting holes 112 on the upper shell 11. Because the striking pad fixing part 221 is elastic, it can be pressed by external force during installation to cause elastic deformation, thereby embedding it into the mounting holes 112. After the elasticity is restored, the striking pad 2 is firmly fixed to the surface of the upper shell 11, effectively limiting the lateral movement of the striking pad 2 during striking. The impact pad buffer 222 consists of multiple spaced flanges, the top of which abuts against the upper surface of the mounting base 111. When an impact pad 2 is struck, the impact pad buffer 222 absorbs part of the vibration energy through elastic deformation, thereby reducing false triggering caused by vibration crosstalk between adjacent impact pads 2.

[0016] The first sensor assembly 3 is disposed on the back of the impact pad support 21, and includes an impact vibration buffer pad 32 made of sponge or silicone and an impact vibration sensor 31. The impact vibration buffer pad 32 is attached to the back of the impact pad support 21, and the impact vibration sensor 31 is fixed to the side of the impact vibration buffer pad 32 away from the main body 21 by adhesive or clips. This design utilizes the softness of the impact vibration buffer pad 32 to reduce rigid impact during striking, protecting the impact vibration sensor 31 from damage; furthermore, the elastic isolation effect of the impact vibration buffer pad 32 further weakens crosstalk vibrations generated when adjacent impact pads strike each other.

[0017] The second sensor assembly 4 is mounted on the mounting base 111, positioned vertically opposite the first sensor assembly 3 corresponding to the impact pad 2. The structure of the second sensor assembly 4 is basically the same as that of the first sensor assembly 3, including a crosstalk vibration buffer pad 42 and a crosstalk vibration sensor 41. Its function is to collect the vibration signals transmitted when adjacent impact pads are struck, for subsequent crosstalk signal determination. (Reference) Figure 3 This is a schematic diagram of other positions of the second sensor in Embodiment 1, that is, the second sensor component 4 and the first sensor component 3 are configured in a non-relative manner.

[0018] The frame 1 contains a circuit board (not shown), on which a signal processing module and a comparison module are integrated. The signal processing module is electrically connected to the impact vibration sensor 31 and the crosstalk vibration sensor 41, respectively, and is used to collect the vibration signals of the impact vibration sensor 31 and the crosstalk vibration sensor 41. The comparison module is electrically connected to the signal processing module and is configured to calculate the difference or ratio between the vibration signal amplitude of the impact vibration sensor 31 and the vibration signal amplitude of the crosstalk vibration sensor 41 within the same time period, and output the comparison result to the signal processing module. The signal processing module generates a valid output based on the comparison result.

[0019] Example 2, Reference Figure 6 The main difference between this embodiment and Embodiment 1 lies in the structural design of the impact pad 2; the configuration principles of the remaining frame 1 and sensors are the same. The impact pad 2 consists of a surface impact surface 5 and a middle buffer layer 6. The buffer layer 6 is located between the impact surface 5 and the mounting base 111. The impact surface 5 is composed of a mesh breathable material.

[0020] The striking surface 5 is made of woven metal mesh or elastic fiber mesh, and its surface forms a regular grid pattern, which can provide the player with a striking feel that is closer to that of traditional percussion instruments.

[0021] The buffer section 6 is laid below the impact surface 5 and is made of high-density polyurethane foam, foamed sponge, etc. When the impact surface 5 is struck, the vibration is transmitted to the first sensor assembly 3 through the compression and rebound of the buffer section 6. The elastic characteristics of the buffer section 6 can not only optimize the vibration transmission efficiency, but also filter high-frequency noise, making the signal collected by the first sensor assembly 3 purer.

[0022] The first sensor assembly 3 is attached to the bottom surface of the buffer part 6 and is fixedly connected to the buffer part 6. Its other end is elastically connected to the mounting base 111 of the upper shell 11 through the impact vibration buffer pad 32, forming a multi-layer vibration transmission structure.

[0023] When a striking pad 2 is struck, the corresponding striking vibration sensor 31 will generate a strong signal due to direct vibration, while the adjacent crosstalk vibration sensor 41 will only generate a weak signal due to vibration crosstalk. By setting a preset threshold for the ratio of the two signal amplitudes, for example, 2:1 (the specific threshold can be determined by adjusting the sensor installation spacing and buffer structure parameters), when the ratio exceeds the threshold, it is determined to be a valid strike and triggers sound; otherwise, it is determined to be a crosstalk signal, and the system does not respond.

[0024] Because of the time difference in vibration transmission on the impact pad 2, the closer the impact point is to the edge of the impact pad, the shorter the time it takes for the vibration to reach the crosstalk vibration sensor 41 of the second sensor assembly 4 at the edge. By comparing the signal start-up time difference (or peak time difference) between the impact vibration sensor 31 and the crosstalk vibration sensor 41, the impact position can be accurately determined: the smaller the time difference, the closer the impact point is to the edge; the larger the time difference, the closer it is to the center.

[0025] By weighting the signals from the impact vibration sensor 31 and the crosstalk vibration sensor 41 (the weights are preset based on the sensor sensitivity and the distance of the installation position from the impact center), the influence of impact position differences on force detection can be eliminated. For example, the signal weight of the first sensor component is higher when the center is struck, and the signal weight of the second sensor component is appropriately increased when the edge is struck. Finally, the weighted sum is used to achieve a uniform output of impact force at different positions.

Claims

1. A portable electronic percussion instrument, characterized in that, include: The frame consists of an upper shell and a lower shell; At least two impact pads are mounted on the frame; The upper shell is provided with mounting seats corresponding to the number of impact pads; A first sensor assembly is used to detect the vibration of the impact pad; One or more second sensor components are configured on the frame for detecting vibrations of the frame.

2. The portable electronic percussion instrument according to claim 1, characterized in that, Each of the impact pads includes an impact pad support and an impact pad striking part, the impact pad striking part being connected to the impact pad support.

3. The portable electronic percussion instrument according to claim 2, characterized in that, The support part of the striking pad is made of a material with a certain rigidity, and the striking part of the striking pad is integrally formed of an elastic material.

4. The portable electronic percussion instrument according to claim 3, characterized in that, The first sensor assembly is disposed on the back of the impact pad support and includes an impact vibration sensor.

5. The portable electronic percussion instrument according to claim 4, characterized in that, The second sensor assembly includes a crosstalk vibration sensor.

6. The portable electronic percussion instrument of claim 5, wherein, The impact pad includes an impact surface and a buffer portion, the buffer portion being located between the impact surface and the mounting base, and the impact surface being composed of a mesh breathable material.

7. The portable electronic percussion instrument according to any one of claims 4-6, characterized in that, The circuit board within the frame integrates a signal processing module and a comparison module. The signal processing module is electrically connected to the impact vibration sensor and the crosstalk vibration sensor, respectively, and is used to collect the vibration signals from the impact vibration sensor and the crosstalk vibration sensor. The comparison module is electrically connected to the signal processing module and is configured to calculate the difference or ratio between the vibration signal amplitude of the impact vibration sensor and the vibration signal amplitude of the crosstalk vibration sensor within the same time period, and output the comparison result to the signal processing module. The signal processing module generates a valid output based on the comparison result.

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