WO2015192325A1

WO2015192325A1 - Detection device and detection method for electronic drum

Info

Publication number: WO2015192325A1
Application number: PCT/CN2014/080119
Authority: WO
Inventors: 赵哲
Original assignee: 赵哲
Priority date: 2014-06-17
Filing date: 2014-06-17
Publication date: 2015-12-23

Abstract

A detection device and detection method for an electronic drum, the device comprising: a casing, a signal amplification circuit (2) disposed in the casing, a sampling detection circuit (3), a band-pass filter amplifier (4), a waveshaping circuit (5), an MCU (8), a drive circuit (9), a power source (6), detection light transmitting and receiving devices disposed on the casing, and a detection signal output device disposed on or in the casing; the power source (6) is respectively connected to the above circuits and devices to supply power; the sampling detection circuit (3) extracts an envelope signal from an amplitude-modulated wave; the included angle of the optical paths of the detection light transmitting and receiving devices is between 0° and 50°; the detection light receiving device (1), the signal amplification circuit (2), the sampling detection circuit (3), the band-pass filter amplifier (4), the waveshaping circuit (5), the MCU (8), the drive circuit (9) and the detection light transmitting device (10) are sequentially connected; the MCU (8) is connected to the sampling detection circuit (3) and the detection signal output device. The method comprises: conducting detection light transmission and receiving on a vibrating drum head; conducting amplification, detection, filtering and waveshaping on the detection light; and detecting the amplitude of the waveshaped signal, and outputting the vibration information. The detection device avoids false detection, and detection is free from the interference of environmental vibration, and is accurate and convenient.

Description

Electronic drum detecting device and electronic drum detecting method

Technical field

The present invention relates to a detecting device for electronic drum vibration, and to a method for detecting vibration of an electronic drum using the device.

Background technique

The conventional electronic drum detecting method is carried out using a conventional electronic drum detecting device. The conventional electronic drum detecting device includes a piezoelectric buzzer and a detecting circuit connected to the piezoelectric buzzer. When detecting, the piezoelectric buzzer is brought into contact with the electronic drum drum. When the electronic drum is struck, the piezoelectric buzzer passes. The vibrating drum skin picks up its vibration audio signal, and the vibration audio signal is amplified by the detecting circuit to detect the amplitude of the drum skin.

The above conventional electronic drum detecting device and electronic drum detecting method have the following drawbacks:

Since the drum drum is usually disposed on the same drum frame on the electronic drum structure, when the vibration state of the electronic drum is detected by the existing electronic drum detecting device, the piezoelectric buzzer of the electronic drum detecting device must be in contact with the electron. Drums, when tapping one of the drums of a plurality of electronic drums, the vibration transmits the weak vibrations to the other drums through the drum frame; since the piezoelectric buzzer is a passive component, its sensitivity is very high. High and unadjustable, when weak vibrations are transmitted through the drum frame to the unshocked drum skin, the piezoelectric buzzer will detect the vibration of the drum skin with which it is etched, thereby causing the drum skin to be struck. Detecting the signal, resulting in a false invention

One of the technical problems to be solved by the present invention is to provide an electronic drum detecting device which overcomes the drawback that the prior art electronic drum detecting device cannot recognize the weak vibration caused by non-knocking and causes false detection.

A second technical problem to be solved by the present invention is to provide an electronic drum detecting method which overcomes the defect that the existing electronic drum detecting method cannot recognize the weak vibration caused by non-knocking due to the existing electronic drum detecting method.

The technical solution adopted by the present invention to solve one of the technical problems is: constructing an electronic drum detecting device, comprising: a housing, a signal amplifying circuit disposed in the housing, a sampling detection circuit, a band pass filter amplifier, a shaping circuit, an M: CU, a driving circuit and a power source, a detecting light emitting device and a detecting light receiving device disposed on the housing, a detection signal output device disposed on the housing or in the housing; the power source and the signal respectively Amplifying circuit, sampling detection circuit, band pass filter amplifier, shaping electric The circuit, the MCU, the driving circuit, the detecting light emitting device, the detecting light receiving device and the detecting signal output device are connected to the power supply;

The sampling detection circuit is a detection circuit capable of taking an envelope signal from the amplitude modulation wave;

The shaping circuit output waveform is a sharp wave;

The detection light emitting device and the detecting light receiving device have an optical path angle greater than or equal to 0° and less than or equal to 50°; the detecting light receiving device, the signal amplifying circuit, the sampling detecting circuit, the band pass filter amplifier, the shaping circuit, the MCU, and the driving circuit Detecting light emitting devices connected in sequence;

The MCU is connected to the sampling detection circuit, and drives the sampling detection circuit for detecting; the MCU is connected to the detection signal output device to output information about drum vibration; the MCU controls the driving circuit to drive the detection light emission device to emit detection Light.

In the electronic drum detecting device of the present invention, the sampling detection circuit includes an electronic analog switch 1, an electronic analog switch 2, an integrating capacitor 1, an integrating capacitor 2, and an operational amplifier, and the electronic analog switch 1 and the electronic analog switch 2 are respectively connected to the The positive and negative input terminals of the operational amplifier, one end of the integrating capacitor one is grounded, and the other end is connected to the connection end of the electronic analog switch and the operational amplifier, one end of the integrating capacitor two is grounded, and the other end is connected to the electronic analog switch 2 The connection end of the operational amplifier; the input end of the electronic analog switch 2 is the input end of the sampling detection circuit, and the output end of the operational amplifier is the output end of the sampling detection circuit.

In the electronic drum detecting device of the present invention, the sampling detection circuit includes a detection diode, a detection capacitor, and a detection resistor, and a positive electrode of the detection diode is connected in series at a first input end of the sampling detection circuit, and the detection capacitor and the detection resistor are respectively connected The negative end of the detection diode and the second input end of the sampling detection circuit, the two ends of the detection resistor are the output end of the sampling detection circuit.

In the electronic drum detecting device of the present invention, the detecting light emitting device and the detecting light receiving device are respectively an infrared light emitting device and an infrared light receiving device, or the detecting light emitting device and the detecting light receiving device are respectively ultraviolet light emitting devices. Device and ultraviolet light receiving device.

In the electronic drum detecting device of the present invention, the detection signal output means is a display or an audio transmission.

The technical solution adopted by the present invention to solve the second technical problem is to provide an electronic drum detecting method, which comprises the following steps: 51. Detecting light emitted from the detected position of the tympanic membrane to be tested, and receiving the detected reflection of the tympanic membrane

52. Perform signal amplification, sampling detection, filtering amplification, and shaping processing on the received detection light reflection signals in sequence;

53. Detecting an amplitude of the shaped signal;

54. Output drum skin vibration information.

In the electronic drum detecting method of the present invention, the detection light is infrared light or ultraviolet light.

The electronic drum detecting device and the electronic drum detecting method embodying the present invention have a beneficial effect compared with the prior art -

1. By adjusting the sensor sensitivity of the detection light receiving device of the electronic drum detecting device, it is possible to avoid picking up the weak vibration transmitted to the other drum skin through the drum frame, thereby avoiding other drum skins when a drum skin is struck on the drum frame. The faint vibration transmitted by the drum frame causes a false detection.

2. It is not subject to environmental vibration, and the drum detection is accurate and convenient.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing the structure of an embodiment of an electronic drum detecting device of the present invention.

Fig. 2 is a schematic diagram showing the detection of the electronic drum detecting device of the present invention.

Figure 3 is a circuit diagram of an embodiment of the sample detection circuit of Figure 1.

4 is a circuit diagram of another embodiment of the sample detection circuit of FIG. 1.

Fig. 5 is a flow chart showing an embodiment of the electronic drum detecting method of the present invention.

detailed description

The invention will now be further described with reference to the drawings and embodiments.

As shown in FIG. 1 to FIG. 4, the electronic drum detecting device of the present invention comprises a housing (not shown), a signal amplifying circuit 2 disposed in the housing, a sampling detecting circuit 3, a band pass filter amplifier 4, and shaping. The circuit 5, the MCU 8, the drive circuit 9 and the power source 6, the detecting light emitting device and the detecting light receiving device provided on the casing, and the detecting signal output device provided on the casing or in the casing. The power source 6 is respectively connected to the signal amplifying circuit 2, the sampling detecting circuit 3, the band pass filter amplifier 4, the shaping circuit 5, the MCU 8, the driving circuit 9, the detecting light emitting device, the detecting light receiving device, and the detecting signal output device Connect the power supply.

The detecting light receiving device, the signal amplifying circuit 2, the sampling detecting circuit 3, the band pass filter amplifier 4, the shaping circuit 5, the MCU 8, the driving circuit 9, and the detecting light emitting device are sequentially connected. The shaping circuit output waveform is a sharp wave.

The MCU 8 is connected to the sampling detection circuit 3, and drives the sampling detection circuit 3 for detection. The MCU 8 is connected to the detection signal output device to output information on the vibration of the drum skin. The MCU 8 controls the driving circuit 9 to drive the detecting light emitting device to emit the detecting light.

In this embodiment, the detecting light emitting device uses the infrared emitting device 10, and the detecting light receiving device uses the infrared receiving device 1, and the corresponding detecting light is infrared light. In other embodiments, the detecting light emitting device may adopt an ultraviolet emitting device, and the detecting light receiving device may adopt a UV receiving device, correspondingly in the embodiment, the detecting signal output device adopts the display 7, and outputs the detected data, The display 7 is disposed on the housing of the electronic drum detecting device for information such as color, graphics, and the like. In other embodiments, the detection signal output device may employ an audio output device (ie, a speaker and its audio output circuit) for outputting audio detection information, such as reading the drum skin detection amplitude, the drum skin with or without vibration signals, and the like. The speaker may be disposed in the housing of the electronic drum detecting device or may be disposed on the housing.

The sampling detection circuit 3 samples a detection circuit capable of taking an envelope signal from the amplitude modulation wave, including but not limited to the following sampling detection circuit:

As shown in FIG. 3, the sampling detection circuit 3 adopts the following structure: the sampling detection circuit includes an electronic analog switch 31, an electronic analog switch 34, an integrating capacitor 32, an integrating capacitor 35, and an operational amplifier 33, and an electronic analog switch 31 and an electronic analog switch 34, respectively. The positive and negative input terminals of the operational amplifier 33 are connected. One end of the integrating capacitor 32 is grounded, and the other end is connected to the connection end of the electronic analog switch 31 and the operational amplifier 33. One end of the integrating capacitor 35 is grounded, and the other end is connected to the electronic analog switch 34 and the operational amplifier. The connection end of 33. Electronic analog switch 31. The input end of the electronic analog switch 34 is the input end of the sampling detection circuit, and the output end of the operational amplifier 33 is the output end of the sampling detection circuit.

As shown in FIG. 4, the sampling detection circuit 3 adopts the following structure: the sampling detection circuit includes a detection diode 36, a detection capacitor 37, and a detection resistor 38. The anode of the detection diode 36 is connected in series at the first input end of the sampling detection circuit, and the detection capacitor 37 and The detection resistors 38 are respectively connected to the negative of the detection diode 36 Between the pole and the second input end of the sampling detection circuit, both ends of the detection resistor 38 are the output ends of the sampling detection circuit.

As shown in FIG. 2, the angle of the optical path of the detecting light emitting device and the detecting light receiving device is selected within a range of 0° or more and 50° or less. For example, an optical path between the detecting light emitting device and the detecting light receiving device may be selected. It is 5°, 10°, 15°, 20. , 25°, 30°, 35°, 40. , 45°, etc.

In use, adjusting the sensitivity of the detecting light receiving device sensor in the electronic drum detecting device can avoid picking up weak vibration transmitted to the other drum skin through the drum frame, thereby avoiding other drum skin when a drum skin is struck on the drum frame. A misdetection caused by weak vibration transmitted by the drum frame occurs.

As shown in FIG. 5, the electronic drum detecting method of the present invention comprises the following steps:

First, the detection position of the vibrating tympanic membrane (i.e., the drumhead) is emitted, and the detection light reflected by the tympanic membrane is received. The detection light is reflected by the vibrating tympanic membrane and then picks up the vibration signal of the tympanic membrane. The detection position is usually near the tension point of the drum.

Secondly, the received detection light reflection signal is sequentially subjected to signal amplification processing, sampling detection processing, filter amplification processing, and shaping processing to obtain an amplitude waveform of the vibration signal, and the waveform is usually a sharp wave.

Third, detecting the amplitude of the shaped signal.

Fourth, output drum skin vibration information.

The detection light of the method may be infrared rays or ultraviolet rays.

The method of outputting related information of the method can adopt the video signal output or the 3⁄4 audio signal output, and can achieve the object of the present invention.

Claims

What is claimed is: 1. An electronic drum detecting device, comprising: a housing, a signal amplifying circuit disposed in the housing, a sampling detection circuit, a band pass filter amplifier, a shaping circuit, an MCU, a driving circuit, and a power supply; a detecting light emitting device and a detecting light receiving device on the body, a detecting signal output device disposed on the casing or in the casing; the power source and the signal amplifying circuit, the sampling detecting circuit, the band pass filter amplifier, the shaping circuit, the MCU ―, the driving circuit, the detecting light emitting device, the detecting light receiving device and the detecting signal output device are connected to the power supply;

The shaping circuit output waveform is a sharp wave;

2. The electronic drum detecting device according to claim 1, wherein the sampling detection circuit comprises an electronic analog switch 1, an electronic analog switch 2, an integrating capacitor 1, an integrating capacitor 2, and an operational amplifier, the electronic analog switch The electronic analog switch 2 is respectively connected to the positive and negative input terminals of the operational amplifier, one end of the integrating capacitor one is grounded, and the other end is connected to the connection end of the electronic analog switch and the operational amplifier, one end of the integrating capacitor two is grounded, and the other end is The input end of the electronic analog switch 2 and the operational amplifier is connected; the input end of the electronic analog switch 2 is an input end of the sampling detection circuit, and the output end of the operational amplifier is an output end of the sampling detection circuit.

The electronic drum detecting device according to claim 1, wherein the sampling and detecting circuit comprises a detecting diode, a detecting capacitor and a detecting resistor, and a positive electrode of the detecting diode is connected in series at a first input end of the sampling detecting circuit, The detecting capacitor and the detecting electric power ffi are respectively connected between the negative pole of the detecting diode and the second input end of the sampling detecting circuit, and both ends of the detecting resistor are the output ends of the sampling detecting circuit.

4. The electronic drum detecting device according to claim 1, wherein said detecting light emission The device and the detecting light receiving device are respectively an infrared light emitting device and an infrared light receiving device, or the detecting light emitting device and the detecting light receiving device are respectively an ultraviolet light emitting device and an ultraviolet light receiving device.

The electronic drum detecting device according to any one of claims 1 to 4, wherein the detection signal output device is a display or an audio output device.

6. An electronic drum detecting method, comprising the steps of:

51. The detection position of the detected tympanic membrane of the vibration is emitted, and the detection light reflected by the tympanic membrane to be tested is received;

53. Detecting an amplitude of the shaped signal;

54. Output drum skin vibration information.

The electronic drum detecting method according to claim 6, wherein the detection light is infrared rays or ultraviolet rays.