Laser musical instrument based on vertical double-beam strength control

Abstract

The utility model discloses a laser musical instrument based on vertical double-beam intensity control, which comprises a plurality of laser sensors and an electronic organ, two laser sensors form a note trigger unit, the two laser sensors are vertically mounted and emit two parallel beams upwards, the sensing distances of the two laser sensors are set to be different, and the electronic organ is arranged on the electronic organ. During playing, two light rays emitted by the laser sensors are slapped by a palm at a certain speed, the two laser sensors are triggered in sequence, two level signals with time difference are output and connected to two contacts of a touch switch below keys of the electronic organ respectively, the electronic organ is triggered to make a sound, and the sound intensity is in direct proportion to the playing strength.

Description

Technical Field

[0001] The present invention relates to the technical field of laser pianos, and in particular to a laser piano based on vertical double-beam force control. Background Art

[0002] Laser piano is an electronic musical instrument that uses laser sensor as trigger device. By blocking or intercepting its laser beam, the laser sensor generates an electrical signal, which triggers the electronic sound source to produce music. Since the laser sensor used in laser piano is a switch type, the trigger signal is a level signal with only two states, 0 and 1, and there is no change in amplitude. It cannot provide force information, so there will be no change in sound intensity. In other words, the volume cannot be controlled by the playing force, which affects the expression ability and the change of timbre, and the effect lacks a sense of hierarchy. Summary of the invention

[0003] In order to enable the laser piano to have a force control function and to bring out a better performance effect, the present invention provides a laser piano based on vertical double-beam force control.

[0004] The present invention provides a laser piano based on vertical double-beam force control, which includes a plurality of laser sensors and an electronic piano. The speed of palm clapping light is used as force information, so that the volume of the laser piano changes with the playing force.

[0005] A group of two laser sensors constitutes a note triggering unit, and the number of the note triggering units is equal to the number of notes of the designed laser piano.

[0006] The two laser sensors of the note trigger unit are placed close together and vertically, and the two light beams emitted upward can be covered by the palm at the same time. The sensing distances of the two laser sensors are set to be different. When the palm is clapped downward, the light beams emitted by the two laser sensors are touched successively, so that the two laser sensors output two level signals with a time difference proportional to the clapping speed.

[0007] The two laser sensor output ends of a note trigger unit are respectively connected to the contacts of two touch switches of a key of the electronic keyboard, triggering the electronic keyboard to emit the sound of the note, and the size of the sound is controlled by the time difference between the two level signals.

[0008] The electronic piano refers to a hardware device such as an electronic piano, a digital music workstation, an electronic synthesizer, etc. with a double-contact force keyboard. There are two touch switches under each key of the keyboard. When the key is pressed, the contacts of the two touch switches contact one after another. The time difference between the contact of the two contacts is used to sense the playing force and control the output volume. The greater the playing force and the faster the speed, the smaller the time difference and the greater the output volume.

[0009] The two laser sensors are set with different sensing distances. Clap your palm downwards to trigger the two laser sensors one after another, and output two level signals to the two contacts of the electronic keyboard keys one after another. The effect is equivalent to pressing the keys to make the electronic keyboard make sounds. The time difference between the two level signals is equivalent to the time difference between the two contacts contacting one after another when pressing the keys, which is proportional to the playing strength, thus realizing the function of controlling the volume by strength.

[0010] Beneficial effects: The laser piano has a force control function, which can give full play to the musical expression ability and achieve better performance effects; the adopted technical solution does not change all the original functions of the electronic piano, and maintains the advancement of the professional sound source to the maximum extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure is a block diagram of the working principle of a laser piano based on vertical dual-beam force control.

[0012] Among them, 1 is the first laser sensor, 2 is the second laser sensor, 3 is the light emitted by laser sensor 1, 4 is the light emitted by laser sensor 2, 5 is an electronic keyboard, 6 is a key of the electronic keyboard, and K1 and K2 are two touch switches under the keys. DETAILED DESCRIPTION

[0013] The exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. In addition, for the sake of clarity, parts not related to the description of the exemplary embodiments are omitted in the accompanying drawings.

[0014] It should be noted that the attached figure only describes a trigger unit for one note, which is composed of two laser sensors. However, a laser piano usually needs to play multiple notes and has a certain range of sound. Therefore, in a specific implementation, the number of note trigger units is equal to the number of notes of the designed laser piano.

[0015] The following will be combined with the attached Figure 1 Embodiments of the present disclosure are described in detail.

[0016] The first laser sensor 1 and the second laser sensor 2 are reflective sensors, which are integrated transmitting and receiving devices. The transmitting end and the receiving end are in the same direction, forming a note triggering unit.

[0017] The first laser sensor 1 and the second laser sensor 2 are closely arranged side by side and installed vertically, and the two parallel light beams 3 and 4 emitted upward can be covered by the palm at the same time.

[0018] The sensing distance of the first laser sensor 1 is set to 28 cm, and the sensing distance of the second laser sensor 2 is set to 25 cm, and the distance L is 3 cm.

[0019] When playing the laser piano, the palm of the hand claps the two light rays downward at a certain speed. The first laser sensor 1 has a longer sensing distance and is triggered first, outputting a level signal to the contact switch K1 of the electronic piano key 6; then after passing a distance L of 3 cm, the second laser sensor 2 is triggered, outputting a level signal to the contact switch K2 of the electronic piano key 6. The whole process is equivalent to pressing the key 6 of a note on the electronic piano 5. The touch switches K1 and K2 below are connected successively, triggering the electronic piano 5 to emit the sound of the note represented by the key 6, and the intensity of this sound is proportional to the clapping speed, realizing the function of controlling the volume by the playing intensity.

[0020] The output ends of the first laser sensor 1 and the second laser sensor 2 are connected to the trigger ends (not the common ends) of the touch switch contacts K1 and K2 by wires to ensure that the level signal trigger is effective. The original keys can be retained and continue to be effective, making it a dual-purpose instrument of an ordinary electronic piano and a laser piano.

[0021] In the embodiment, the first laser sensor 1 and the second laser sensor 2 are BX-662 reflective laser sensors.

[0022] Model of electronic keyboard 5 is YAMAHA PSR-670 digital music workstation.

Claims

1. A laser piano based on vertical double-beam force control, characterized by: A laser piano based on vertical double-beam force control comprises a plurality of laser sensors and an electronic piano. The speed of palm clapping light is used as force information so that the volume of the laser piano changes with the playing force. A group of two laser sensors constitutes a note trigger unit, and the number of note trigger units is equal to the number of notes of the designed laser piano. The two laser sensors of the note trigger unit are arranged vertically side by side and close to each other. The two light beams emitted upward can be covered by the palm at the same time. The sensing distances of the two laser sensors are set to be different. When the palm is clapped downward, the light beams emitted by the two laser sensors are touched successively, so that the two laser sensors output two level signals with a time difference proportional to the clapping speed. The output ends of the two laser sensors of a note trigger unit are respectively connected to the contacts of two touch switches of a key of the electronic piano, so as to trigger the electronic piano to emit the sound of the note, and the size of the sound is controlled by the time difference between the two level signals.

2. A laser piano based on vertical double beam force control according to claim 1, characterized in that The electronic keyboard structure comprises an electronic keyboard with a double-contact force keyboard, a digital music workstation and an electronic synthesizer.

Images