CN118197267A - Double-beam laser drum with force control function - Google Patents
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- CN118197267A CN118197267A CN202410398365.8A CN202410398365A CN118197267A CN 118197267 A CN118197267 A CN 118197267A CN 202410398365 A CN202410398365 A CN 202410398365A CN 118197267 A CN118197267 A CN 118197267A
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- 230000009977 dual effect Effects 0.000 claims description 4
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- 238000009434 installation Methods 0.000 claims description 2
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Abstract
The invention discloses a double-beam laser drum with a force control function, which consists of a plurality of unit drums, a signal processing system and an electronic drum sound source unit, wherein each unit drum consists of two laser sensors and a corresponding drum ring structure, when two laser lines sent by the two laser sensors are intercepted by a drum stick or a palm in sequence, signals output by the two laser sensors generate a time interval proportional to the knocking force, the signal processing system outputs analog voltage signals with different magnitudes according to the size of the time interval, triggers the electronic drum sound source unit to send sounds with different volumes, realizes the function of controlling the sound size by the knocking force, and provides four force response modes with different characteristics according to the different signal processing methods so as to adapt to various use requirements, so that the performance characteristics of the laser drum are more perfect.
Description
Technical Field
The present disclosure relates to the technical field of laser sensors and electronic musical instruments, and in particular, to a dual-beam laser drum with a force control function.
Background
The electronic drum in modern musical instrument has dynamics control function, is controlled by the beating dynamics of musician and makes the size of sound, and the principle is that install microphones or piezoelectric ceramics piece etc. pickup on the pad of every analog drum or cymbal, when beating these pads, the pickup receives the vibration and produces the signal of telecommunication, and the size of signal amplitude is directly proportional with the dynamics of beating, and the electronic drum sound source can be according to the difference of signal amplitude, makes the sound that has the intensity to change. The laser drum is a pickup device using a laser sensor to replace an electronic drum, and triggers an electronic drum sound source machine to make sound in a mode of blocking a light beam of the laser sensor to generate an electric signal, and the patent 'electronic drum triggered by a photoelectric sensor' (patent number ZL 202222237016.7) is referred to. Because the laser sensor is switch-type, the trigger signal is only in 0 and 1 states, and has no amplitude change, the change of sound intensity can not be generated, namely the volume can not be controlled by the knocking force, the change of the expression capability and tone color is influenced, the effect lacks layering, and the laser drum is an obvious defect of the existing laser drum.
Disclosure of Invention
In order to solve the problem that the volume of an existing laser drum cannot be controlled by knocking force, the present disclosure provides a dual-beam laser drum with a force control function.
The dual-beam laser drum with the force control function comprises a plurality of unit drums, a signal processing system, a control program, a force control mode selection and control characteristic adjusting device, an electronic drum sound source machine and an appearance structure, and can emit sounds with different volumes according to different knocking forces.
The unit drums form a set of laser drums, and the number of the unit drums is determined according to the number of the required tone colors. Each unit drum consists of two laser sensors and a corresponding drum ring structure, wherein the laser sensors are reflection type transceiver integrated sensors, each laser sensor comprises two parts, namely laser transmitting and receiving parts, the laser transmitting and receiving parts are packaged in a shell, the transmitting end and the receiving end are in the same direction, and when the transmitted laser is blocked, the laser can be reflected to the receiving end to trigger the laser sensors to output level signals.
The drum ring structure of the unit drum is divided into an opening type drum ring structure and a closing type drum ring structure, and the installation mode and the playing mode of the laser sensor are different:
the unit drum of open-type drum circle, two laser sensor install at open-type drum circle' S same one end, transversely place from top to bottom side by side, and the horizontal direction sends two parallel laser lines that the interval is S, seals the opening part to the form performance that the stick was strikeed, blocks two laser lines in proper order when the stick runs through drum circle opening part and beats, triggers two laser sensor output signals, and the time interval of two signals is the t (see fig. 2).
The unit drum of the closed drum ring, two laser sensors are vertically installed below the middle of the drum ring side by side, two parallel laser lines with different sensing distances are emitted upwards, the sensing distance difference is S, the unit drum is played in the form of palm beating, when the palm beats down on the drum ring, the two laser sensors are triggered successively, and the time interval of output signals of the two laser sensors is t (see fig. 3).
Beating speed of drum stick or palmIs proportional to the knocking force and is used for expressing force information.
The output ends of the two laser sensors of the unit drum are connected with the two input ends of the signal processing system by signal wires, and the knocking speed V is converted into an analog voltage signal V required by the electronic drum in the signal processing system.
In order to match the dynamics response characteristics with the performance habits of different musicians and adapt to the performance effect requirements of different scenes, the output signal V and the knocking speed V have no only simple linear relation, and the following four conversion methods are needed to obtain dynamics response modes meeting different requirements:
(1) Linear mode: the output signal V has a linear relation between amplitude and force variation V, is the simplest conventional mode, has uniform response and is close to the sounding principle of the traditional musical instrument and the electronic musical instrument. The conversion formula is as follows:
（1）
where the coefficient a 1 determines the slope of the curve, which can change the force sensitivity.
(2) Soft mode: the main range of the output signal V is concentrated in the area with smaller force value, the volume change is soft, and the effect is fine. The conversion formula is:
（2）
wherein the coefficient a 2 is more than or equal to 0, and the curvature of the curve can be changed.
(3) Intense mode: the force response is heavy and sensitive, the main range of the output signal V is concentrated in the area with larger force value, and the method is suitable for playing music with heavier force such as rock and roll. The conversion formula is:
（3）
wherein the coefficient a 3 is less than or equal to 0, The curvature of the curve can be changed. Coefficient/>The maximum input signal voltage V max defined by the electronic drum sound source machine.
(4) Fixed mode: the amplitude V of the output signal is fixed and unchanged, is irrelevant to the knocking force, and is used for occasions such as exercise, demonstration, interaction and the like. The conversion formula is:
（4）
Where a 4 is a constant, varying a 4 may vary the magnitude of the constant output signal voltage.
The output end of the signal processing system is connected with the input end of the electronic drum sound source machine by a signal wire, and the converted analog voltage signal V is transmitted to the electronic drum sound source machine to drive the electronic drum sound source machine to make sound.
The electronic drum sound source machine is a standard electronic product and can output sounds with different intensities according to the amplitude of an input analog voltage signal V.
Further, a dual-beam laser drum with a force control function is provided, and 1 mode change-over switch is arranged outside the signal processing system and used for selecting four force control modes.
Further, 4 characteristic adjusting knobs are arranged outside the signal processing system and used for adjusting parameters a 1～a4 in formulas (1) - (4) respectively.
When a plurality of unit drums are combined into a sleeve drum, a signal processing system and an electronic drum sound source machine are shared.
The beneficial effects are that: the dual-beam laser drum with the dynamics control function provided by the disclosure uses an electronic drum sound source machine as a sound source, is a high-quality professional hard sound source, and is completely different from a laser drum using MIDI sound sources and various synthetic sound sources; the processing method in the control program is designed according to the inherent characteristics of the electronic drum sound source machine, so that the laser drum is a real musical instrument which has the same effect as the electronic drum and can be played. The specific effects are as follows:
(1) The music playing machine has a dynamics control function, and can control the change of sound intensity and tone according to performance dynamics. The playing force of the musical instrument not only controls the volume, but also controls the change of the tone color, and the expression capability of the music can be fully exerted by controlling the volume by the force.
(2) The four dynamics response modes cover various performance requirements of the laser drum and can be flexibly selected according to different application scenes.
(3) Has the function of adjusting the force response characteristic, and is suitable for the force difference and performance habit of different people. Once the traditional musical instrument is manufactured, the dynamics response characteristics of the traditional musical instrument are determined, people are required to be familiar and mastered through long-term hard exercises, the characteristics of the musical instrument can adapt to the habit of people, the operation difficulty of the musical instrument is definitely reduced, and more people can play the musical instrument.
Drawings
Fig. 1 is a schematic block diagram of a dual beam laser drum with force control.
Fig. 2 is a schematic diagram of an open structure of a dual beam laser drum with force control.
Fig. 3 is a schematic diagram of a closed structure of a dual beam laser drum with force control.
Wherein 1 is a laser sensor, 2 is a laser sensor, 3 is a signal processing system, 4 is an electronic drum sound source machine, 5 is a laser line emitted by the laser sensor 1, 6 is a laser line emitted by the laser sensor 2, and 7 is a drum ring structure.
Detailed Description
Exemplary implementations of embodiments of the present disclosure will be described in detail below with reference to the drawings so that those skilled in the art can easily implement them. In addition, for the sake of clarity, portions irrelevant to description of the exemplary embodiments are omitted in the drawings.
In the presently disclosed embodiments, it is to be understood that the terms such as "comprises" or "comprising" and the like are intended to indicate the presence of features, numbers, steps, acts, components, portions, or combinations thereof disclosed in the present specification, and are not intended to exclude the possibility of one or more other features, numbers, steps, acts, components, portions, or combinations thereof being present or added.
Two embodiments of the present disclosure will be described in detail below with reference to fig. 1, 2, and 3.
Embodiment one: the unit drum of the open structure is played with a stick, see fig. 2.
Two reflective first laser sensors 1 and second laser sensors 2 are mounted at one end of an open-ended drum 7, emitting two parallel laser lines 5 and 6 with a laser line spacing S.
The two laser lines 5 and 6 are sequentially intercepted by knocking the drum stick from top to bottom through the opening of the drum ring 7, the first laser sensor 1 and the second laser sensor 2 are triggered to respectively output a signal and have a time interval of fatt, and the signals are respectively supplied to two input ends of the signal processing system 3 through the signal lines.
The signal processing system 3 is a circuit module containing a single chip microcomputer, converts the time interval t of two input signals into a knocking speed V through the operation of an internal control program, and then converts the knocking speed V into an analog voltage signal V with variable amplitude, and four conversion methods are used for converting the analog voltage signal V into four dynamics control modes with different response characteristics for selection.
The analog voltage signal V which is converted by the signal processing system 3 and output is transmitted to the electronic drum sound source machine 4 through a signal wire, and the electronic drum sound source machine 4 emits sound with corresponding intensity according to the amplitude of the input analog voltage signal V, so that the function of controlling the sound size by using knocking force is realized.
A four-gear physical switch is arranged outside the signal processing system 3 to select different force modes; four potentiometers and knobs are provided to respectively adjust the characteristic parameters a 1～a4 in each mode.
When a plurality of unit drums are combined into a sleeve drum, the signal processing system 3 and the electronic drum sound source device 4 are shared.
Embodiment two: the unit drum of the closed structure is played by the palm, see fig. 3.
The two reflective first laser sensors 1 and the second laser sensors 2 are arranged below the middle of the closed drum ring 7, two parallel laser lines 5 and 6 are emitted upwards, the sensing distance of the two laser sensors is adjusted, the sensing distances of the two laser lines 5 and 6 are different, and the height difference is S.
When the palm is used for beating downwards from the drum 7, two laser lines 5 and 6 are touched successively, so that the first laser sensor 1 and the second laser sensor 2 respectively output a signal and have a time interval of fatt, and the signals are respectively supplied to two input ends of the signal processing system 3 through data lines.
The subsequent processing process is the same as that of the first embodiment, and the volume is controlled by the knocking force.
In both embodiments, the first laser sensor 1 and the second laser sensor 2 are of the BX-662 type.
The signal processing system 3 adopts a Pro MINI ATMEGA P type modular development board, and comprises a ATMEL ATMEGA328P-AU singlechip, and has multiple input and output interfaces and multiple control functions.
The model of the electronic drum sound source machine 4 is Roland TD-27.
Claims (2)
1. A double-beam laser drum with dynamics control function, its characterized in that: a dual-beam laser drum with a force control function consists of a plurality of unit drums, a signal processing system and an electronic drum sound source machine;
Each unit drum consists of two reflective laser sensors and a corresponding drum ring structure, the output ends of the two laser sensors of the unit drum are connected with the input end of a signal processing system through signal wires, and the output end of the signal processing system is connected with the input end of an electronic drum sound source machine through signal wires;
the reflection type laser sensor is a receiving and transmitting integrated device and comprises a laser transmitting part and a laser receiving part, the laser transmitting part and the laser receiving part are packaged in a shell, and a transmitting end and a receiving end are arranged in the same direction;
the drum ring structure of the unit drum is divided into an opening type structure and a closing type structure, and the installation mode and the playing mode of the laser sensor with the two structures are different;
The unit drum of the open-type drum ring is provided with two laser sensors which are arranged at the same end of the open-type drum ring, are transversely placed side by side up and down, emit two parallel laser lines with the interval S in the horizontal direction, play the unit drum in a drum stick knocking mode, intercept the two laser lines in sequence when the drum stick is knocked through the opening of the drum ring, trigger the two laser sensors to output signals, and the time interval of the two signals is t;
The unit drum of the closed drum ring is characterized in that two laser sensors are vertically arranged below the middle of the drum ring side by side, two parallel laser lines with different sensing distances are emitted upwards, the sensing distance difference is S, the unit drum is played in a palm beating mode, when the palm beats downwards on the drum ring, the two laser sensors are triggered successively, and the time interval of output signals of the two laser sensors is t;
the signal processing system converts the knocking speed v=S/-t obtained by the time interval t into analog voltage signals V with different amplitudes, and drives the electronic drum sound source machine to emit sounds with different volumes;
The control program converts the knocking speed V into analog voltage signals V with different amplitudes, four conversion methods are provided, and four dynamics control modes with different response characteristics are obtained, wherein the dynamics control modes are respectively as follows:
(1) Linear mode: the response is uniform, and the conversion formula is that ；
(2) Soft mode: the volume change is soft and fine, and the conversion formula is that；
(3) Intense mode: the force response is heavy and sensitive, and the conversion formula is as follows:；
(4) Fixed mode: the amplitude V of the output signal is fixed and unchanged, and the conversion formula is that 。
2. A dual beam laser drum with force control according to the previous claim, characterized in that the signal processing system is externally provided with an operable change-over switch and an adjusting knob for the switching of the various force modes and the adjustment of the various response characteristics according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410398365.8A CN118197267A (en) | 2024-04-03 | 2024-04-03 | Double-beam laser drum with force control function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410398365.8A CN118197267A (en) | 2024-04-03 | 2024-04-03 | Double-beam laser drum with force control function |
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| CN118197267A true CN118197267A (en) | 2024-06-14 |
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| CN202410398365.8A Pending CN118197267A (en) | 2024-04-03 | 2024-04-03 | Double-beam laser drum with force control function |
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