Laser harp device and control method thereof

Abstract

The invention relates to the technical field of laser harps, and discloses a laser harp device and a control method thereof, the laser harp device comprises a playing module, a control module, a sound production module and an infrared assembly, the playing module comprises a plurality of light-transmitting tubes, one end of each light-transmitting tube is provided with a light source generator, and the other end of each light-transmitting tube is provided with a photosensitive sensor; the control module is electrically connected with the photosensitive sensor and used for generating a control signal according to the action of the playing module; the sounding module is electrically connected with the control module and makes a sound according to a control signal of the control module; the infrared assemblies comprise an infrared generator and an infrared receiver which are arranged on the two sides of the playing module respectively, and the multiple sets of infrared assemblies are arranged in an array mode in the length direction of the light-transmitting tube. According to the invention, by establishing the mapping relation among the note types, the duration time and the sound production intensity, different notes can be selected in real time through multi-dimensional feedback, and meanwhile, the rhythm and the intensity of the sound can be changed, so that the real simulation of the hand feeling when the string instrument is played by a human hand is realized.

Description

Technical Field

[0001] The invention relates to the technical field of laser harp, and in particular to a laser harp device and a control method thereof. Background Art

[0002] The laser harp is an innovative musical instrument that uses a laser beam instead of traditional strings. When the performer plucks the laser beam with his hand, the corresponding tone is triggered, thereby achieving the performance of music. This instrument is usually composed of a laser transmitter, a photoelectric sensor, and a control module. The laser harp can not only achieve the performance of music, but also achieve more diverse music creation and performance by connecting to electronic devices. The production of the laser harp can be realized through single-chip microcomputers such as Arduino, using laser transmitters and photoelectric sensors to detect the disconnection and connection status of the laser beam, and then emit different tones. The development prospects of the laser harp are broad. With the advancement of laser technology, its performance will become more precise and flexible, providing more possibilities for music creation.

[0003] Some existing laser harp products use a method of directly emitting laser light through a laser transmitter. The laser beam passes through the air or through a light pipe filled with a particle solution to hit the photoresistor, and then controls the circuit to make a sound or not. The actual principle is that the laser head is always on, shining from one end of the string to the other end. There is a photoresistor at the other end. Between the light and no light, the circuit will collect high and low levels or voltage changes, and then control the audio generation circuit, making the speaker or buzzer make a pleasant sound.

[0004] For example, a Chinese invention patent application with publication number CN110570835A discloses a portable electronic laser piano that can be connected to an external intelligent terminal, including a laser head, a photosensitive sensor, acrylic keys, a control circuit and a software program. The laser emitted by the laser head irradiates the photosensitive sensor. By pressing the keys to block the light path, the level jump of the photosensitive sensor is realized, and the level signal is transmitted to the single-chip control circuit. The control circuit sends instructions according to the level signal to drive the speaker to sound by the music chip. At the same time, the instructions will also be converted into Bluetooth signals by the Bluetooth module and sent outward. The Bluetooth signal can be received by the intelligent terminal to realize the sound. The invention uses transparent keys to play laser beams, which has strong playability, beautiful and novel, and is light and portable. At the same time, the invention uses a single-chip microcomputer and software control to jointly realize digital sound simulation, which can realize information interconnection with intelligent terminals for teaching or entertainment purposes. It is creative, practical, interesting, and has a strong dynamic music demonstration effect.

[0005] Another example is a Chinese invention patent application with publication number CN117334172A, which discloses a visual laser harp and a control method thereof, wherein the laser harp comprises a laser head and a photosensitive sensor arranged relatively to each other, and further comprises a light-transmitting tube arranged between the laser head and the photosensitive sensor, wherein the light-transmitting tube contains a particle solution for generating the Tyndall effect with the laser. The invention enables the operator to easily see the light path, facilitates accurate playing, realizes visualization, is not limited by the performance venue, and improves the appreciation of the performance.

[0006] However, the existing laser harp still has some shortcomings. For example, the existing laser harp usually uses a single-chip microcomputer as the control system and is equipped with a buzzer or a speaker. It cannot restore or simulate the timbre of a real harp or other musical instruments. And there is no feedback on the strength of the note signal and the duration of the note, so it cannot be used as a musical instrument. Therefore, the application scenarios of the existing laser harp are relatively limited, and it is generally used as a children's toy.

[0007] SUMMARY OF THE INVENTION

[0008] The technical problem solved by the present invention is that the existing laser harp has a simple sounding mode and is relatively limited in application scenarios. It is generally used as a children's toy and cannot be used as a musical instrument.

[0009] The purpose of the present invention can be achieved through the following technical solutions:

[0010] A laser harp device, comprising:

[0011] A performance module, the performance module comprising a plurality of light-transmitting tubes, the light-transmitting tubes being filled with a particle solution, a light source generator being arranged at one end of the light-transmitting tubes, and a photosensitive sensor being arranged at the other end, the light source generator being used to form a light beam in the light-transmitting tubes toward the photosensitive sensor;

[0012] A control module, which is electrically connected to the photosensitive sensor and is used to generate a control signal according to the action of the performance module;

[0013] A sound-generating module, electrically connected to the control module, and emitting sound according to a control signal from the control module;

[0014] Infrared components, the infrared components include infrared generators and infrared receivers respectively arranged on both sides of the performance module, and multiple groups of infrared components are arranged in an array along the length direction of the light-transmitting tube;

[0015] The control module respectively establishes a mapping relationship between the light-transmitting tube and the note type, a mapping relationship between the blocking time of the light-transmitting tube beam and the sound duration, and a mapping relationship between the blocked position of the light-transmitting tube along the length direction and the sound intensity.

[0016] In one embodiment of the present invention, the light-transmitting tube comprises an upper light-transmitting tube and a lower light-transmitting tube arranged on the same straight line, and the upper light-transmitting tube and the lower light-transmitting tube are spaced apart to form a playing area.

[0017] In one solution of the present invention, the number of the light-transmitting tubes is seven, and mapping relationships are established with seven musical notes, 1do, 2re, 3mi, 4fa, 5so, 6la, and 7xi, respectively in the control module.

[0018] In one embodiment of the present invention, the light source generator includes a driver and a laser head, and the driver is electrically connected to the control module.

[0019] In one solution of the present invention: the sound module includes a digital power amplifier, a frequency divider and a speaker unit, the digital power amplifier is electrically connected to the control unit, and the frequency divider is electrically connected to the digital power amplifier and the speaker unit respectively.

[0020] In one solution of the present invention: the frequency divider includes a left channel frequency divider and a right channel frequency divider, and the speaker unit corresponding to each frequency divider includes a tweeter and a woofer.

[0021] In one solution of the present invention: a prism group is arranged on the light beam path of the light-transmitting tube, and the prism group is used to separate the light beam toward the imaging module.

[0022] In one embodiment of the present invention, the imaging module includes a beam expander lens, an aperture and a projection screen. The light beam separated by the prism group passes through the beam expander lens and the aperture and is projected onto the projection screen to form an enlarged circular light spot.

[0023] In one embodiment of the present invention, the control module further includes a touch screen as an interaction unit.

[0024] A control method for a laser harp device comprises the following steps:

[0025] Establish a mapping relationship between the beam position and the note type;

[0026] Establish a mapping relationship between the light beam blocking time and the sound emission duration;

[0027] Establishing a mapping relationship between the blocked position of the light-transmitting tube along the length direction and the sound intensity;

[0028] Get control mode data;

[0029] Obtaining the position data of the blocked light beam, the blocking time data of the light beam, and the blocking position data of the light beam along the length direction;

[0030] Processing the data based on the mapping relationship to form a control signal including the note type, sound duration and sound intensity;

[0031] The sound module is controlled to emit sound through the control signal.

[0032] In one embodiment of the present invention, the control modes include playing mode, performance mode, following mode and practice mode.

[0033] A laser harp device and a control method thereof according to the present invention have at least one of the following technical effects:

[0034] (1) By establishing a mapping relationship between note type, duration, and sound intensity, the present invention can select different notes in real time through multiple-dimensional feedback, while changing the beat and strength of the sound finally emitted by the device, thereby achieving a true simulation of the feel of a human hand playing a string instrument; the high-performance sound effect enables the present invention to be applied in more scenarios;

[0035] (2) The present invention adopts a high-performance ARM processor, matched with a digital power amplifier, a high-bass crossover and a high-bass speaker, which can better restore the timbre of the musical instrument itself; at the same time, the touch screen used as an interactive unit can simulate different string instruments, which can achieve a better interactive experience.

[0036] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0038] Figure 1 It is a schematic diagram of the present invention as a whole;

[0039] Figure 2 It is a connection diagram of the sound module of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0043] See also Figure 1-2 The present invention provides a laser harp device, comprising:

[0044] A performance module, the performance module comprising a plurality of light-transmitting tubes, the light-transmitting tubes being filled with a solution for generating Tyndall effect particles so as to fully display the light path, a light source generator being arranged at one end of the light-transmitting tubes, and a photosensitive sensor being arranged at the other end, the light source generator being used to form a light beam in the light-transmitting tubes toward the photosensitive sensor;

[0045] The control module is electrically connected to the photosensitive sensor and is used to generate a control signal according to the action of the playing module. The photosensitive sensor converts the light signal into an electrical signal. The control module is responsible for collecting the electrical signal, so as to detect whether there is a playing situation (whether the light beam is blocked), and then control the sound module to make a sound based on this;

[0046] A sound-generating module, electrically connected to the control module, and emitting sound according to a control signal from the control module;

[0047] Infrared components, the infrared components include infrared generators and infrared receivers respectively arranged on both sides of the performance module, and multiple groups of infrared components are arranged in an array along the length direction of the light-transmitting tube;

[0048] The control module respectively establishes a mapping relationship between the light-transmitting tube and the note type, a mapping relationship between the blocking time of the light-transmitting tube beam and the sound duration, and a mapping relationship between the blocked position of the light-transmitting tube along the length direction and the sound intensity.

[0049] In one embodiment of the present invention, the light-transmitting tubes include an upper light-transmitting tube and a lower light-transmitting tube arranged on the same straight line, and the upper light-transmitting tube and the lower light-transmitting tube are arranged at intervals to form a playing area. The number of the light-transmitting tubes is seven, and mapping relationships are established with the seven musical notes 1do, 2re, 3mi, 4fa, 5so, 6la, and 7xi in the control module.

[0050] In one embodiment of the present invention, the light source generator includes a driver and a laser head, the driver is electrically connected to the control module, and the laser head can emit light beams of different colors. It can also emit light of different colors according to the instructions of the control module to achieve richer sound and light effects.

[0051] In one embodiment of the present invention, the sound module includes a digital power amplifier, a frequency divider and a speaker unit, the digital power amplifier is electrically connected to the control unit, and the frequency divider is electrically connected to the digital power amplifier and the speaker unit respectively. The frequency divider includes a left channel frequency divider and a right channel frequency divider, and the speaker units corresponding to each frequency divider include a tweeter and a woofer. The digital power amplifier is a power amplifier using digital signal processing technology. It converts the audio signal into a digital signal for processing and then converts it back to an analog signal output. It has the advantages of low distortion, low noise, and a large dynamic range. The digital power amplifier chip can be NTP8835, NTP8849 or NTP8918 of the Korean NF series.

[0052] In one embodiment of the present invention, a prism group is arranged on the light beam path of the light-transmitting tube, and the prism group is used to separate the light beam toward the imaging module. The imaging module includes a beam expander lens, an aperture and a projection screen. The light beam separated by the prism group passes through the beam expander lens and the aperture and is projected onto the projection screen to form an enlarged circular light spot.

[0053] In one embodiment of the present invention, the control module also includes a touch screen as an interactive unit, through which control instructions can be read and input, or used to display the control process of music performance, or to input and establish mapping relationships, adjust, manipulate and select control modes, etc.

[0054] The present invention also provides a control method for a laser harp device, comprising the following steps:

[0055] Establish a mapping relationship between the beam position and the note type;

[0056] Establish a mapping relationship between the light beam blocking time and the sound emission duration;

[0057] Establishing a mapping relationship between the blocked position of the light-transmitting tube along the length direction and the sound intensity;

[0058] Acquire control mode data; the control modes include playing mode, performance mode, following mode and practice mode.

[0059] Obtaining the position data of the blocked light beam, the blocking time data of the light beam, and the blocking position data of the light beam along the length direction;

[0060] Processing the data based on the mapping relationship to form a control signal including the note type, sound duration and sound intensity;

[0061] The sound module is controlled to emit sound through the control signal.

[0062] Working principle of the present invention:

[0063] The control module drives the laser driver to generate different laser beams through the colors planned by the user, thereby realizing interactive performances with music. The laser is at the top, emitting laser beams vertically downward, and the photoresistor receives the light signal at the bottom. When the user plays music, the finger moves between the two transparent tubes (the upper transparent tube and the lower transparent tube form a playing area), and the particle solution in the transparent tube makes the light path clearly visible, so that the performer can accurately control the position and intensity of the laser beam, realizing the visualization of the music performance, and adding a smoke generating device in the laser space. The smoke generating device can be a water mist generator or other smoke generators, and the smoke generating device can further enhance the display effect of the light path. At the same time, it can provide richer sound and light effects when used. When the performer's finger blocks the beam, the photoresistor cannot receive the laser signal, and the control module will feedback and send out the corresponding note. The combination of a laser and a photoresistor corresponds to a note, and seven laser beams of different colors (red, orange, yellow, green, cyan, blue, and purple) correspond to 7 notes of 1do, 2re, 3mi, 4fa, 5so, 6la, and 7xi. By establishing a mapping relationship between the blocking time of the beam and the length of the note, the sound of notes of different beats can be achieved, that is, the duration of the sound of the note can be controlled by obtaining the duration of the laser beam being blocked, so as to obtain a richer musical sound effect. At the same time, an infrared transmitter array is installed on the left side of the laser harp. The infrared transmitter is evenly arranged along the optical path direction of the laser on one side of the laser harp (the direction is up and down as an example) for transmitting infrared signals. An infrared receiver array is installed on the right side for receiving infrared signals, that is, the infrared signal is horizontally transmitted on the left side and received on the other side. According to the position of the infrared laser, a one-dimensional longitudinal coordinate is established (reflecting the longitudinal position of the finger in the laser beam. It can be understood that after the finger blocks the infrared signal at the corresponding position, the receiver cannot receive the signal, and the position of the finger in the up and down direction can be obtained), and a linear mapping relationship is established between the intensity of the note signal from 0 to the peak value and the coordinate. When the finger is at a certain position of a certain laser beam, the visible light signal is cut off and the infrared signal will also be cut off. At this time, its longitudinal coordinate information is returned and the corresponding note intensity is output. Therefore, we have comprehensively regulated the note type, note duration and note intensity respectively, and can achieve a musical effect close to reality. Since this performance technology is not limited by the performance venue, the audience can enjoy the combination of laser and music in different environments, which improves the viewing and diversity of the performance. At the same time, the photosensitive sensor can collect the time of finger triggering and leaving in real time, and the infrared receiver can collect the vertical height information of the finger in real time. The control module transmits this data to the internal real-time software synthesizer to optimize and adjust the timbre, and the left and right position of the finger (the type of laser beam blocked), the upper and lower position (the height of the blocked laser), and the duration (the duration of the blocking) are matched with the type of note, the intensity of the note and the beat of the note, and flexible coding is achieved.The invention not only adds a new form of expression to music performance, but also promotes the innovative application of laser technology in the field of sound. This new way of music performance perfectly combines laser technology with artistic expression, bringing a new audio-visual experience to the audience.

[0064] The present invention provides a variety of control methods. For example, in the playing mode, the type of notes can be modified through an interactive interface. By controlling the height of the fingers and the time of blocking the laser, the user can play different music. This operation mode gives the user direct control over the pitch and rhythm of the notes, allowing the user to create unique musical works according to his or her own creativity. This innovative interactive performance technology greatly enriches the expression of music and provides a more diverse and personalized performance experience. In the performance mode, follow-up mode and practice mode, the user is allowed to input currently popular or personally collected music scores to meet different usage requirements. The music scores input by the user will be analyzed to extract the type, intensity and duration of the notes, and then converted into laser control signals. These signals will be used to adjust the switching state of the laser group, and finally output a changing image display effect on the imaging unit.

[0065] The control module is equipped with a high-performance ARM processor, built-in real-time software synthesizer and control software, combined with a touch screen interactive unit, to achieve a realistic performance experience of restoring multiple musical instruments. The system not only has excellent real-time processing capabilities, but also provides a rich sound library and sound effect simulation functions, bringing delicate and moving music performance. At the same time, the touch screen design of the interactive unit makes the operation more intuitive and convenient, meeting the user's needs for playing multiple musical instruments. The interactive unit is equipped with a touch screen to achieve efficient human-computer interaction. Users can operate intuitively through the touch screen and enjoy the fun of music creation and performance. The touch screen interface design is friendly and intuitive, allowing users to easily navigate and control the various functions of the instrument simulator, and can restore the performance of multiple musical instruments, meeting the diverse needs of music lovers for music creation and performance.

[0066] The sound module consists of a digital power amplifier, a left channel crossover, a right channel crossover, a tweeter and a woofer. Through the carefully designed crossover, the treble and bass can be accurately distributed to the corresponding speaker units, ensuring the clarity and accuracy of the audio signal. Digital power amplifier technology can provide efficient audio amplification, so that music can be properly expressed in each frequency band, and users can enjoy a high-quality music experience.

[0067] The prism group is uniquely designed to realize the free adjustment of the light beam, so that the laser can present a variety of patterns and different light and shadow effects. That is, the prism group includes multiple prisms, and a handle can be set on the prism, or the prism can be connected to a power source such as a motor. When in use, the angle of the prism can be rotated manually or driven by a power source, thereby changing the effect of the prism group on the light beam, and achieving the purpose of changing the pattern formed by the light beam irradiated on the imaging unit. Through clever angle and direction adjustment, users can obtain colorful and diverse light beam performances, adding a visual feast to specific occasions or activities. This innovative design makes the laser beam performance more vivid and varied, which can meet the user's diverse needs for visual effects and expand the practical application field of the device. After passing through the prism group, the laser beam is divided into two groups, one of which is irradiated to the surface of the photoresistor through the prism to trigger the note; the other is irradiated to the imaging unit through refraction. The imaging unit may include a beam expander lens, an aperture, a projection screen, etc., so that it finally presents an enlarged circular light spot. The laser beams of different wavelengths and intensities modulated by the music signal will finally present different color mixing effects through the imaging unit, increasing the fun and appreciation of the laser harp device.

[0068] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A laser harp device, characterized in that: include: A performance module, the performance module comprising a plurality of light-transmitting tubes, the light-transmitting tubes being filled with a particle solution, a light source generator being arranged at one end of the light-transmitting tubes, and a photosensitive sensor being arranged at the other end, the light source generator being used to form a light beam in the light-transmitting tubes toward the photosensitive sensor; A control module, which is electrically connected to the photosensitive sensor and is used to generate a control signal according to the action of the performance module; A sound-generating module, electrically connected to the control module, and emitting sound according to a control signal from the control module; Infrared components, the infrared components include infrared generators and infrared receivers respectively arranged on both sides of the performance module, and multiple groups of infrared components are arranged in an array along the length direction of the light-transmitting tube; The control module respectively establishes a mapping relationship between the light-transmitting tube and the note type, a mapping relationship between the blocking time of the light-transmitting tube beam and the sound duration, and a mapping relationship between the blocked position of the light-transmitting tube along the length direction and the sound intensity.

2. A laser harp device according to claim 1, characterized in that: The light-transmitting tube comprises an upper light-transmitting tube and a lower light-transmitting tube which are arranged on the same straight line, and the upper light-transmitting tube and the lower light-transmitting tube are arranged at intervals to form a playing area.

3. A laser harp device according to claim 2, characterized in that: There are seven light-transmitting tubes, and mapping relationships are established in the control module with seven musical notes 1do, 2re, 3mi, 4fa, 5so, 6la, and 7xi respectively.

4. A laser harp device according to claim 1, characterized in that: The light source generator comprises a driver and a laser head, and the driver is electrically connected to the control module.

5. A laser harp device according to claim 1, characterized in that: The sound module includes a digital power amplifier, a frequency divider and a speaker unit. The digital power amplifier is electrically connected to the control unit, and the frequency divider is electrically connected to the digital power amplifier and the speaker unit respectively.

6. A laser harp device according to claim 5, characterized in that: The frequency divider includes a left channel frequency divider and a right channel frequency divider, and the speaker unit corresponding to each frequency divider includes a tweeter and a woofer.

7. A laser harp device according to claim 1, characterized in that: A prism group is arranged on the light beam path of the light-transmitting tube, and the prism group is used to separate the light beam toward the imaging module.

8. A laser harp device according to claim 7, characterized in that: The imaging module includes a beam expander lens, an aperture and a projection screen.

9. A control method for a laser harp device, characterized in that: The steps include: Establish a mapping relationship between the beam position and the note type; Establish a mapping relationship between the light beam blocking time and the sound emission duration; Establishing a mapping relationship between the blocked position of the light-transmitting tube along the length direction and the sound intensity; Get control mode data; Obtaining the position data of the blocked light beam, the blocking time data of the light beam, and the blocking position data of the light beam along the length direction; Processing the data based on the mapping relationship to form a control signal including the note type, sound duration and sound intensity; The sound module is controlled to emit sound through the control signal.

10. The control method of a laser harp device according to claim 9, characterized in that: The control modes include playing mode, performance mode, following mode and practice mode.

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