Music tag interactive system and music tag interactive method

Abstract

The present invention relates to a music tag interactive system and a music tag interactive method. The music tag interactive system includes two transmission channels, one is a magnetic field transmission channel, which uses a magnetic field to identify an identification code and control a music tag, and the other is a light transmission channel, which uses light to transmit an analog sound signal to an interactive music tag reading device. The present invention achieves the purpose of full duplex by separating the sound channel from the communication channel.

Description

Technical Field

[0001] The present invention relates to a radio frequency application technology, and more specifically, the present invention relates to a music tag interactive system and a music tag interactive method. Background Art

[0002] Figure 1 The circuit diagram of the radio frequency identification tag circuit of the background art is shown. Figure 1 The coil Lr senses the external magnetic field and generates oscillations, which are then rectified by a bridge to provide power to the microprocessor 100. The microprocessor 100 loads a signal to the resonant circuit of the coil Lr and the capacitor Cr through the output interface Dout, and transmits data back to the reader through mutual inductance.

[0003] As costs decrease, more and more RFID (Radio Frequency Identification) technologies are being used in the consumer and toy fields. Considering the reader cost and mass production, 125KHz RFID technology is more common in the toy field. From the perspective of digital wireless transmission, in order to transmit voice data and to be able to operate multi-tags, the data rate must be fast to handle transmission errors, data loss, communication collisions and other issues.

[0004] According to the EM4100 / 4200 compatible specifications, the data rate is about 125KHz / 16=7.8125Kbps. Because the carrier frequency is low, the data rate is not easy to increase. It is not enough to transmit audio data at this speed. At the same time, when there are multiple RFID tags, communication collisions need to be handled, which will further reduce the effective data rate.

[0005] In the Taiwan Utility Model Patent No. M542893 of the same inventor in this case, a wireless music tag technology is disclosed. In this patent, the tag transmits the sound to the receiving end in a one-way manner by only transmitting analog sound waves, thereby solving the above-mentioned problem of insufficient rate and transmitting multiple sounds at the same time for mixing. However, the analog sound is continuously transmitted uninterruptedly, resulting in the user being unable to control the sound transmitted by the above-mentioned music tag.

[0006] Similarly, the applicant proposed an interactive music tag that can transmit simulated sound in patent proposal 108107753 "Music tag interactive system and music tag interactive method". This technology uses magnetic field as a channel to transmit sound and control commands. Since sound and control commands use the magnetic field as a channel at the same time, they cannot be carried out in parallel at the same time, and time-division multiplexing technology must be used. In further expanding applications, such as the simultaneous existence of multiple music tags, there is also a collision problem, which increases the communication occupancy time and further reduces the sound transmission time. Summary of the invention

[0007] One object of the present invention is to provide a music tag interactive system and a music tag interactive method, by adding an optical transmission channel to the music tag, the simulated sound is transmitted to the music tag reading end through the photoelectric effect. The control part and the music part are separated. In this way, the reading end can control the music tag end, such as play, pause, stop, continue playing, previous song or next song.

[0008] The present invention proposes a music tag interactive system, which includes an interactive music tag and an interactive music tag reading device. The interactive music tag includes an LC resonant circuit, a microprocessor and an optical output circuit. The LC resonant circuit includes a first end and a second end. The microprocessor is coupled to the first end and the second end of the LC resonant circuit. The optical output circuit is coupled to the microprocessor to output an analog optical signal. The interactive music tag reading device includes a coil, an optical receiving device and a control circuit. The coil is used to provide the interactive music tag with a wireless energy and read the signal transmitted by the interactive music tag. The optical receiving device receives the above-mentioned analog optical signal and converts it into an analog sound electrical signal. The control circuit is coupled to the coil and the optical receiving device to control the wireless energy sent by the coil. When the interactive music tag approaches the interactive music tag reading device, the LC resonant circuit receives the wireless energy sent by the interactive music tag reading device and starts the microprocessor. The microprocessor outputs an analog sound signal to the optical output circuit according to the stored sound data. The optical output circuit determines the strength of the analog optical signal according to the magnitude of the analog sound signal, and the optical output circuit determines the frequency of the analog optical signal according to the frequency of the analog sound signal. The interactive music tag reading device inserts a control signal into the wireless energy. The microprocessor receives the wireless energy from one of the first end or the second end of the resonant circuit, decodes the control signal, and controls an output state of the analog optical signal according to the control signal.

[0009] According to the music tag interactive system described in the preferred embodiment of the present invention, the optical output circuit is an infrared light emitting diode. In a preferred embodiment, the output status includes play, stop, fast forward, fast rewind, pause, and double speed play. In a preferred embodiment, the optical receiving device is an infrared photodiode.

[0010] According to the music tag interactive system described in the preferred embodiment of the present invention, the LC resonant circuit includes an inductor and a capacitor. The first end of the inductor is coupled to the first end of the LC resonant circuit, and the second end of the inductor is coupled to the second end of the LC resonant circuit. The first end of the capacitor is coupled to the first end of the LC resonant circuit, and the second end of the capacitor is coupled to the second end of the LC resonant circuit.

[0011] The present invention further proposes a music tag interactive method, which is applicable to at least one interactive music tag and an interactive music tag reading device. The music tag interactive method includes: when the interactive music tag approaches the interactive music tag reading device: outputting a wireless energy to the interactive music tag to activate the interactive music tag; and outputting an analog optical signal to the optical receiving device of the interactive music tag reading device based on the stored sound data, so that the analog optical signal is converted into an analog sound electrical signal; when the interactive music tag reading device performs an output control on the interactive music tag, inserting a control signal into the wireless energy; and when the interactive music tag device receives the wireless energy through the LC resonant circuit of the interactive music tag: decoding the wireless energy to decode the control signal; and controlling an output state of the analog optical signal based on the control signal.

[0012] The spirit of the present invention is to add an optical channel transmission mechanism to the tag, through which analog sound signals are transmitted, while the tag identification and control signal parts are transmitted through the magnetic field channel, so the reading end can give instructions to the music tag, and the music tag can obtain the instructions through decoding to reflect them on the output analog music signal. Therefore, the operability of both the music tag reading device and the music tag can be achieved, and the interactivity of the two can be enhanced.

[0013] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A circuit diagram of a radio frequency identification tag circuit according to the background art is shown.

[0015] Figure 2 FIG. 4 is a circuit diagram of a music tag interactive system according to a preferred embodiment of the present invention.

[0016] Figure 3 FIG. 1 is a circuit diagram of an interactive music tag 20 of a music tag interactive system according to a preferred embodiment of the present invention.

[0017] Figure 4 A schematic diagram showing a music tag interactive system having multiple interactive music tags according to a preferred embodiment of the present invention is shown.

[0018] Figure 5 A schematic diagram showing a music tag interactive system having multiple interactive music tags according to a preferred embodiment of the present invention is shown.

[0019] Figure 6 FIG. 4 is a circuit diagram of a mixing circuit according to a preferred embodiment of the present invention.

[0020] Figure 7 FIG. 4 is a circuit diagram of a mixing circuit according to a preferred embodiment of the present invention.

[0021] Figure 8 FIG. 4 is a schematic diagram of a preferred embodiment of the present invention for performing multi-channel communication using optical channels.

[0022] Fig. 9 A flowchart of an interactive music tag reading device of a music tag interactive method according to a preferred embodiment of the present invention is shown.

[0023] Fig.10 A flowchart of an interactive music tag method of a preferred embodiment of the present invention is shown.

[0024] Lr: Coil

[0025] 100: Microprocessor

[0026] Dout: output interface

[0027] Cr: Capacitance

[0028] 20: Interactive Music Tags

[0029] 21: Interactive music tag reading device

[0030] 211: Coil

[0031] 212: Optical receiving device

[0032] 213: Control circuit

[0033] 201: Resonance Coil

[0034] 202: Optical output circuit

[0035] 300: LC resonant circuit

[0036] 301: Microprocessor

[0037] 302: Resonant capacitor

[0038] AUDN: Music output interface of microprocessor 301

[0039] 215, OP1, OP2: Amplifier

[0040] 214: Sound playback device

[0041] 401~403: Interactive music tags

[0042] 404, 501~503: Infrared photodiode receiver

[0043] IR1~IR3: Analog optical signal

[0044] AUD1~AUD3: Analog sound signal

[0045] 60: Amplifier

[0046] R1~R6:resistance

[0047] C1: Capacitor

[0048] Q1, Q2: bipolar transistors

[0049] ACIN: Endpoints

[0050] S901-S906: Steps of an interactive music tag reading device of a music tag interactive method according to a preferred embodiment of the present invention

[0051] S1001-S1006: Steps of interactive music tags in a music tag interactive method of a preferred embodiment of the present invention DETAILED DESCRIPTION

[0052] Figure 2 The circuit diagram of the music tag interactive system of a preferred embodiment of the present invention is shown in FIG. Figure 2, this music tag interactive system includes an interactive music tag 20 and an interactive music tag reading device 21. The interactive music tag reading device 21 includes a coil 211, an optical receiving device 212 and a control circuit 213. The interactive music tag 20 has two channels for transmitting signals, namely a resonant coil 201 for transmitting magnetic field signals and an optical output circuit 202 for transmitting analog sound signals, wherein the optical output circuit 202 is preferably implemented by an infrared light emitting diode (IR LED). However, those with ordinary knowledge in the technical field should know that ordinary light emitting diodes can also be used as embodiments of the present invention. However, in this preferred embodiment, considering that infrared rays are invisible and will not interfere with ordinary users, the present invention is not limited to this. Similarly, in this embodiment, the optical receiving device 212 is preferably implemented by an infrared photodiode receiver (IR Photo-Diode). However, those with ordinary knowledge in the technical field should know that ordinary photodiode receivers can also be used as embodiments of the present invention. Therefore, the present invention is not limited to this.

[0053] Figure 3 FIG. 2 is a circuit diagram of an interactive music tag 20 of a music tag interactive system according to a preferred embodiment of the present invention. Figure 3 The interactive music tag 20 includes an LC resonant circuit 300, a microprocessor 301, and an optical output circuit 202. The LC resonant circuit 300 is composed of a resonant coil 201 and a resonant capacitor 302. The microprocessor 301 is coupled to both ends of the LC resonant circuit 300 to receive energy from the LC resonant circuit 300. The optical output circuit 202 is coupled to the microprocessor 301.

[0054] Please refer to Figure 2 as well as Figure 3, the coil 211 is used to provide wireless energy to the interactive music tag 20. When the interactive music tag 20 approaches the interactive music tag reading device 21, the LC resonant circuit 300 receives the wireless energy sent by the interactive music tag reading device and starts the microprocessor 301. After the microprocessor 301 is started, it starts to control the LC resonant circuit 300 and sends the tag identification code (RFID) through the magnetic field signal. After the interactive music tag reading device 21 receives the identification code (RFID) of the interactive music tag 20, it can start to insert a control signal into the wireless energy output by the coil 211 to request the interactive music tag 20 to output music. When the microprocessor 301 of the interactive music tag 20 decodes the control signal instruction from the wireless energy received through the LC resonant circuit 300, the microprocessor 301 outputs an analog sound signal to the optical output circuit (an infrared light emitting diode in this embodiment) 202 through the music output interface (AUDN) of the microprocessor 301 according to the sound data stored therein. The optical output circuit 202 determines the strength of the analog optical signal according to the size of the analog sound signal, and the optical output circuit 202 determines the frequency of the analog optical signal according to the frequency of the analog sound signal.

[0055] At this time, the interactive music tag reading device 21 receives the analog optical signal from the optical receiving device (in this embodiment, an infrared photodiode receiver) 212, and converts the analog optical signal into an analog sound electrical signal through the photoelectric effect. After amplification by the amplifier 215, the control circuit 213 plays the amplified analog sound electrical signal through the sound playing device 214.

[0056] The control signal output by the interactive music tag reading device 21 can not only control the interactive music tag 20 to output analog music of analog optical signals, but also control the output state of the analog optical signals of the interactive music tag 20, including play, stop, fast forward, fast rewind, pause, double speed play, etc. Since the playback control of the music is all performed on the tag, the interactive music tag reading device 21 does not need to convert the received analog music into digital and temporarily store it.

[0057] Although the above embodiment takes a single interactive music tag 20 as an example, a person having ordinary knowledge in the relevant technical field should know that the present case can still be applied to examples of multiple interactive music tags 20. Figure 4 A schematic diagram of a music tag interactive system having multiple interactive music tags according to a preferred embodiment of the present invention is shown. Figure 4In this embodiment, each interactive music tag 401-403 is represented by an infrared light emitting diode, and the interactive music tag reading device 21 is represented by an infrared photodiode receiver 404. The analog optical signals IR1-IR3 output by the interactive music tags 401-403 can be directly overlapped (mixed) on the light, so in this embodiment, the interactive music tag reading device 21 only needs one set of amplifiers to convert the analog optical signals IR1-IR3 output by the three interactive music tags 401-403 into analog sound signals without additional mixing.

[0058] In addition, although the interactive music tags 401-403 are represented by only one infrared light emitting diode, those skilled in the art can refer to Figure 2 , Figure 3 After the embodiments of the present invention, it should be known that the circuits and operations of the interactive music tags 401-403 can be Figure 2 as well as Figure 3 The present invention is not limited thereto.

[0059] Figure 5 A schematic diagram of a music tag interactive system having multiple interactive music tags according to a preferred embodiment of the present invention is shown. Figure 4 as well as Figure 5 , Figure 5 and Figure 4 The difference is that the interactive music tag reading device 21 includes three infrared photodiode receivers 501-503 corresponding to the three interactive music tags 401-403. Therefore, in this embodiment, the analog optical signals IR1-IR3 are converted into three analog sound signals AUD1-AUD3. Therefore, three amplifiers corresponding to the three infrared photodiode receivers 501-503 are required, and mixing is performed in the circuit. Mixing can use a common analog adding circuit, such as Figure 6 As shown, Figure 6 FIG. 1 is a circuit diagram of a mixing circuit according to a preferred embodiment of the present invention. Figure 6 This circuit is a three-way mixing circuit composed of an amplifier 60, resistors R1-R6 and capacitor C1.

[0060] Figure 7 FIG. 1 is a circuit diagram of a mixing circuit according to a preferred embodiment of the present invention. Figure 7 In this embodiment, two bipolar transistors Q1, Q2 and resistors R1-R6 are used to form amplifiers OP1 and OP2 to amplify the signals received by infrared photodiode receivers 701 and 702, respectively, and the output ends of the amplifiers OP1 and OP2 are coupled to the ACIN terminal. In this way, the sounds received by the infrared photodiode receivers 701 and 702 are mixed in the circuit.

[0061] It can be seen from the above embodiments that since the optical signals used in this case are all analog signals, the superposition of analog signals is much easier to process in circuits than digital signals. Figure 4 They usually share the same infrared photodiode receiver or photoelectric transistor, which is superimposed at the light end and then converted to photoelectricity. Figure 5 Generally, multiple infrared photodiode receivers or photoelectric transistors are used to perform photoelectric conversion first and then superimpose on the electrical signal. The superposition of electrical signals can be as follows Figure 6 or Figure 7 Generally implemented.

[0062] Figure 8 FIG. 1 is a schematic diagram of a preferred embodiment of the present invention for performing multi-channel communication using optical channels. Figure 8 As for the background technology, when using radio frequency identification tags (RFID), there is usually a need for multiple groups of tags to exist at the same time. In traditional radio frequency identification tag communication, since amplitude shift keying (ASK) is mostly used, when communication collides, an anti-collision response mechanism needs to be adopted, such as the ALOHA (Additive Link On-line HAwaii System) communication protocol. However, in the embodiment of this music tag, since a second communication channel "light" is introduced to transmit sound, in addition to the original magnetic field communication channel, a sound channel is also provided. And sound can be cut out of multiple channels for different tags to use by different frequencies. For example, sound occupies the frequency band below 16KHz, and communication uses the frequency band above 16KHz. The receiving end uses BPF to extract the frequency band of the required signal and then decodes it. Therefore, in addition to the original magnetic field frequency band that can broadcast (broadcast) common signals, each audio band can each transmit the unique signal of the tag, such as events (event), sound status (audio status), etc.

[0063] Fig. 9 The flowchart of the interactive music tag reading device of the music tag interactive method according to a preferred embodiment of the present invention is shown. Fig. 9 , the music tag interaction method includes the following steps:

[0064] Step S901: Start.

[0065] Step S902: Output a wireless energy to the interactive music tag to activate the interactive music tag.

[0066] Step S903: Receive the radio frequency signal transmitted by the interactive music tag.

[0067] Step S904: Decode the radio frequency signal to obtain a tag identification code of the interactive music tag.

[0068] Step S905: Determine whether the user inputs an instruction. Generally speaking, there will be configured buttons on the interactive music tag reading device, such as a play button, a pause button, a fast forward button, a rewind button, a stop button, a double-speed play button, etc.

[0069] Step S906: Loading instruction codes into the wireless energy according to the input instructions.

[0070] Fig.10 The flowchart of the interactive music tag of the music tag interactive method of a preferred embodiment of the present invention is shown. Fig.10 , the music tag interaction method includes the following steps:

[0071] Step S1001: Start.

[0072] Step S1002: Receive wireless energy. The wireless energy is generally electromagnetic energy transmitted by an interactive music tag reading device.

[0073] Step S1003: Output an analog light signal to the interactive music tag reading device.

[0074] Step S1004: Determine whether there is a control signal in the wireless energy. If no control signal is sent, continue to determine. If a control signal is sent, proceed to step S1005.

[0075] Step S1005: Decode the wireless energy to decode the control signal.

[0076] Step S1006: According to the control signal, control an output state of the analog optical signal. For example, instructions such as play, pause, fast forward, rewind, stop, double speed play, triple speed play, etc. For example, when a "pause" instruction is received, the output of the analog optical signal will be temporarily stopped; for another example, when a "double speed play" instruction is received, the analog optical signal will be output at twice the speed of the analog music. In this way, the radio frequency identification music tag can be controlled like controlling a tape. Since the output of the music tag is an analog signal, the receiving end does not need any temporary storage device to execute the above instructions. After completion, return to step S1004 for continuous judgment.

[0077] In summary, the spirit of the present invention is to add an optical channel transmission mechanism to the tag, and transmit analog sound signals through the optical channel, while the tag identification and control signal part is transmitted through the magnetic field channel. Therefore, the reading end can give instructions to the music tag, and the music tag can obtain the instructions through decoding to reflect on the output analog music signal. Therefore, the operability of both the music tag reading device and the music tag can be achieved, and the interactivity of the two is enhanced.

[0078] The specific embodiments proposed in the detailed description of the preferred embodiments are only used to facilitate the description of the technical content of the present invention, and are not intended to narrowly limit the present invention to the above embodiments. All changes and implementations made without exceeding the spirit of the present invention and the scope of the above claims are within the scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the above claims.

Claims

1. A music tag interactive system, comprising: An interactive music tag, comprising: an LC resonant circuit, a microprocessor and an optical output circuit, wherein the LC resonant circuit comprises a first end and a second end; The microprocessor is coupled to the first end and the second end of the LC resonant circuit; The optical output circuit is coupled to the microprocessor and is used to output an analog optical signal; and An interactive music tag reading device comprises: a coil, an optical receiving device and a control circuit, wherein the coil provides the interactive music tag with wireless energy and reads the magnetic field signal transmitted by the interactive music tag; The optical receiving device receives the analog optical signal and converts it into an analog sound electrical signal; and The control circuit is coupled to the coil and the optical receiving device to control the wireless energy sent by the coil; When the interactive music tag approaches the interactive music tag reading device, the LC resonant circuit receives the wireless energy sent by the interactive music tag reading device and activates the microprocessor. The microprocessor outputs an analog sound signal to the optical output circuit according to the stored sound data. The optical output circuit determines the strength of the analog optical signal according to the magnitude of the analog sound signal. Furthermore, the optical output circuit determines the frequency of the analog optical signal according to the frequency of the analog sound signal. The interactive music tag reading device inserts a control signal into the wireless energy, the microprocessor receives the wireless energy from one of the first end or the second end of the resonant circuit, decodes the control signal, and according to the control signal, the microprocessor controls an output state of the analog optical signal.

2. The music tag interactive system according to claim 1, characterized in that: The optical output circuit is an infrared light emitting diode.

3. The music tag interactive system according to claim 1, characterized in that: The output status includes play, stop, fast forward, fast rewind, pause, and double speed play.

4. The music tag interactive system according to claim 1, characterized in that: The LC resonant circuit includes: an inductor, comprising a first end and a second end, wherein the first end of the inductor is coupled to the first end of the LC resonant circuit, and the second end of the inductor is coupled to the second end of the LC resonant circuit; and A capacitor includes a first end and a second end, wherein the first end of the capacitor is coupled to the first end of the LC resonant circuit, and the second end of the capacitor is coupled to the second end of the LC resonant circuit.

5. The music tag interactive system according to claim 1, characterized in that: The optical receiving device is an infrared photodiode.

6. The music tag interactive system according to claim 1, characterized in that: The music tag interactive system further includes a second interactive music tag, and the second interactive music tag includes: a second LC resonant circuit, comprising a first end and a second end; a second microprocessor coupled to the first end and the second end of the second LC resonant circuit; and a second optical output circuit, coupled to the second microprocessor, for outputting a second analog optical signal, When the second interactive music tag approaches the interactive music tag reading device, the second LC resonant circuit receives the wireless energy sent by the interactive music tag reading device and activates the second microprocessor. Afterwards, the second microprocessor outputs an analog sound signal to the second optical output circuit based on the stored sound data. The second optical output circuit determines the intensity of the second analog optical signal based on the size of the analog sound signal. Furthermore, the second optical output circuit determines the frequency of the second analog optical signal based on the frequency of the analog sound signal.

7. The music tag interactive system according to claim 6, characterized in that: The interactive music tag reading device further comprises: A second optical receiving device is used to receive the second analog optical signal.

8. The music tag interactive system according to claim 1, characterized in that: The optical receiving device is further used to output an optical data signal, wherein the interactive music tag reading device further comprises: a bandpass filter, coupled to the optical receiving device, for performing bandpass filtering; and A decoding device is coupled to the bandpass filter and is used for decoding the optical data signal.

9. The music tag interactive system according to claim 8, characterized in that: The data decoded from the optical data signal includes event data and voice status.

10. A music tag interactive method, applicable to at least one interactive music tag and an interactive music tag reading device, the music tag interactive method comprising: When the interactive music tag approaches the interactive music tag reading device: The interactive music tag reading device outputs a wireless energy to the interactive music tag to activate the interactive music tag; as well as The interactive music tag outputs an analog optical signal to the optical receiving device of the interactive music tag reading device according to the stored sound data, so that the analog optical signal is converted into an analog sound electrical signal; When the interactive music tag reading device performs an output control on the interactive music tag, a control signal is inserted into the wireless energy; as well as When the interactive music tag receives the wireless energy through the LC resonant circuit of the interactive music tag: Decoding the wireless energy to decode the control signal; According to the control signal, an output state of the analog optical signal is controlled.

11. The music tag interaction method according to claim 10, characterized in that: The output status includes play, stop, fast forward, fast rewind, pause, and double speed play.

12. The music tag interaction method according to claim 10, characterized in that: The LC resonant circuit includes: an inductor, comprising a first end and a second end, wherein the first end of the inductor is coupled to the first end of the LC resonant circuit, and the second end of the inductor is coupled to the second end of the LC resonant circuit; and A capacitor includes a first end and a second end, wherein the first end of the capacitor is coupled to the first end of the LC resonant circuit, and the second end of the capacitor is coupled to the second end of the LC resonant circuit.

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