WO2007003074A1 - A wireless outdoor sound equipment - Google Patents

A wireless outdoor sound equipment Download PDF

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Publication number
WO2007003074A1
WO2007003074A1 PCT/CN2005/001109 CN2005001109W WO2007003074A1 WO 2007003074 A1 WO2007003074 A1 WO 2007003074A1 CN 2005001109 W CN2005001109 W CN 2005001109W WO 2007003074 A1 WO2007003074 A1 WO 2007003074A1
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WO
WIPO (PCT)
Prior art keywords
wireless
frequency
amplifier
audio
wireless receiver
Prior art date
Application number
PCT/CN2005/001109
Other languages
French (fr)
Chinese (zh)
Inventor
Shuzhe Fang
Original Assignee
Shuzhe Fang
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shuzhe Fang filed Critical Shuzhe Fang
Publication of WO2007003074A1 publication Critical patent/WO2007003074A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones

Definitions

  • the present invention relates to an audio device, and more particularly to a wireless outdoor audio device.
  • Background Art A conventional outdoor sound is an audio frequency of an indoor amplifier ⁇ passing through a step-up transformer 2, and a connection line is transmitted to the outside, and is connected to the horn 4 through an audio step-down transformer 3 to emit a sound.
  • the drawback is that the connection line is complicated and the installation work is large.
  • SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless outdoor audio device that is easy to install, reliable in operation, and capable of obtaining a variety of signals.
  • the invention relates to a wireless outdoor audio device, which is composed of a wireless transmitter and a wireless receiver;
  • the wireless transmitter is composed of a volume control circuit, a frequency generator, a high frequency amplifier and a band pass filter, the volume
  • the control circuit adds the volume to the frequency generator, and the frequency generator modulates the signal and sends it to the high-frequency amplifier for amplification.
  • the band-pass filter fixes the signal amplified by the high-frequency amplifier and transmits it through the antenna.
  • the wireless receiver includes an input loop, a difference frequency amplifier, an audio amplifier, a solar battery, and a horn.
  • the input loop selects a frequency and sends the selected frequency signal to a difference frequency amplifier, and the difference frequency amplifier changes the high frequency.
  • the intermediate frequency is converted into an audio signal, which is amplified by the audio amplifier and output from the rab eight, and the solar cell supplies power to the circuit.
  • An audio signal input interface is provided on the wireless transmitter.
  • An MP3 interface, a MIC jack, and a radio are provided on the wireless transmitter.
  • the wireless receiver is also connected in series with the battery.
  • the wireless receiver further includes a subwoofer with a low frequency filter serially connected to the input end of the subwoofer audio amplifier, filtering the middle and high frequency of the audio to only reproduce the low frequency portion and being amplified by the audio amplifier. After output from the woofer.
  • the wireless transmitter and the wireless receiver of the present invention adopt a wireless electrical connection manner, and simultaneously use a solar battery and a storage battery on the wireless receiver, and provide a stable working power supply of the wireless receiver by the solar battery and the storage battery.
  • the outdoor audio can be reliably operated without any connection (power cord or audio cable), which greatly facilitates the user's use and installation, and expands its use range; and can add different inputs as needed.
  • Ports such as MIC, MP3, etc. are more convenient to use, and the special ultra-low speaker can be added to enhance the sound effect, and multi-partition can also be used for partition broadcasting.
  • the outdoor sound can be installed in outdoor decorations such as stone carvings or in various corners of the courtyard, so that it has various beautiful shapes.
  • FIG. 1 is a schematic view of a conventional outdoor acoustic structure
  • Figure 2 is a circuit diagram of a wireless receiver of the present invention
  • FIG. 3 is a circuit diagram of an embodiment of a wireless transmitter of the present invention.
  • FIG. 4 is a circuit diagram of two embodiments of a wireless transmitter of the present invention.
  • Figure 5 is a circuit diagram of a third embodiment of the wireless transmitter of the present invention.
  • Figure 6 is a circuit diagram of a fourth embodiment of the wireless transmitter of the present invention.
  • FIG 12 is a circuit diagram of a wireless receiver of the present invention having enhanced bass sound quality.
  • the present invention has five ways to transmit audio signal converted radio waves to the outdoor wireless receiver 2 through the wireless transmitter 1, and the outdoor wireless receiver 2 converts the radio signals into audio signals, by: it: p eight sounds.
  • the five ways are as follows:
  • the first method (as shown in FIG. )) is to transmit an audio signal F such as a CD or a DVD to the outdoor wireless receiver 2 through the wireless transmitter 1, and activate the sound of the single program, and can connect one or several outdoor sounds at the same time.
  • the circuit uses the circuit structure shown in Figure 3.
  • the second mode (shown in Figure 8) is a wireless transmitter 1B that adds a radio function A/FM to the original, which allows the present invention to choose between audio and radio.
  • the circuit is constructed using the circuit shown in Figure 4.
  • the third and fourth modes are based on the first two methods.
  • the connector and the MC socket that can directly insert the MP3 player into the 1C of the wireless transmitter are added.
  • the transmitter 1 can simultaneously select audio signals, A/FM radio, MP3 playback, and MIC talk.
  • the circuit uses the circuit structure shown in FIG.
  • the five methods are based on the above different audio input methods.
  • the wireless transmitter 1D can be divided into several transmission frequencies, or simultaneously transmitted separately, so that the wireless receivers 2 in different zones simultaneously Or the audio signal transmitted by the wireless transmitter 1 is played separately, and the effect of simultaneous or partition playback has been achieved.
  • the circuit uses the circuit structure shown in Figure 6.
  • the present invention designs the following circuit structure. As shown in Figs. 2 and 3, the present invention is a wireless outdoor audio device which is composed of a wireless transmitter 1 and a wireless receiver 2.
  • the wireless transmitter 1 is composed of a volume control circuit 11, a frequency generator 12, a high frequency amplifier 13, a band pass filter 14, and an antenna 15.
  • the volume control circuit 11 adds the volume to the frequency generator 12, and the frequency generator 12 modulates the signal and sends it to the high frequency amplifier 13 for amplification.
  • the bandpass filter 14 amplifies the signal amplified by the high frequency amplifier 13.
  • the frequency is fixed and transmitted through the antenna 15.
  • the wireless transmitter 1 further has an audio signal interface AUX, a radio interface AM FM, an MP3 interface, and a MIC jack.
  • the frequency generator 12 includes an audio oscillator G and an amplifier A1, which can use a 2SC9D18 chip.
  • the high frequency amplifier 13 includes an amplifier A2 which can employ an SH10 chip.
  • the wireless receiver 2 includes an input circuit 21, a difference frequency amplifier 22, an audio amplifier 23, a solar battery 24, a battery 25, and a horn 26.
  • the input circuit 21 selects a frequency and selects The subsequent frequency signal is sent to the difference frequency amplifier 22, and the difference frequency amplifier 22 changes the high frequency to the intermediate frequency, and then changes the intermediate frequency to an audio signal, which is amplified by the audio amplifier 23 and output from the speaker 26.
  • the solar battery 24 and the battery 25 are used to supply power to the circuit.
  • the input loop 21 and the difference frequency amplifier 22 include an operational amplifier IC1, which can be a CX1191S chip.
  • the audio amplifier 23 includes an operational amplifier IC2, which can be a TDA2822 chip.
  • the wireless receiver 2 can have multiple parts and can be installed in different places, such as stone carvings, pavilions, and the like.
  • the wireless receiver 3 can be specially designed as a receiver for ultra-low speakers.
  • the wireless receiver 3 includes an input circuit 31, a difference frequency amplifier 32, a low frequency filter 33, an audio amplifier 34, a solar battery 35, a battery 36, and a woofer 37.
  • the frequency is selected and the selected frequency signal is sent to the difference frequency amplifier 32.
  • the difference frequency amplifier 32 changes the high frequency to an intermediate frequency, and then changes the intermediate frequency to an audio signal.
  • the low frequency filter 33 is serially connected to the audio amplifier 34.
  • the input terminal is filtered by the low frequency filter 33 and amplified by the audio amplifier 34, and the middle and high frequency of the audio is filtered out to reproduce only the low frequency portion and output from the woofer 36.
  • a solar battery 35 and a battery 36 are used to supply power to the circuit.
  • the input circuit 31 and the difference frequency amplifier 32 include an operational amplifier IC1, which can be a CX1191S chip.
  • the audio amplifier 34 includes an operational amplifier IC2, the operational amplifier IC2 can employ a TDA2822 chip, and the low frequency filter 33 can employ an LC filter.
  • the use of this wireless receiver can better reflect the bass sound quality and increase the overall system sound playback.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Circuits Of Receivers In General (AREA)
  • Transmitters (AREA)

Abstract

A wireless outdoor sound equipment consists of wireless sender and wireless receiver. The said wireless sender consists of volume control circuit, frequency generator, high frequency amplifier and band pass filter; the said wireless receiver includes import circuit, difference frequency amplifier, audio amplifier, solar battery and horn, the said solar battery provides power for circuit. Wireless electric connection mode is used between the wireless sender and wireless receiver, and the solar battery and accumulator are used in the receiver at the same time, the solar battery and accumulator provide stable working power supply to the wireless receiver without any line (powerline or sound line) enabling the sound outdoors to work reliablely, thereby bring great convenience to the use of user.

Description

无线室外音响设备 技术领域 本发明涉及一种音响设备， 特别是涉及一种无线室外音响设备。 背景技术 传统的室外音响是将室内放大器 Γ的音频电频通过升压变压器 2，连接线传至室外， 通过音响的降压变压器 3，连至喇叭 4，发出声音。 其缺陷是连接线路复杂且安装工程量大。 发明内容 本发明的目的在于提供一种使用安装方便、工作可靠、可获得多 种信号的无线室外音响设备。  TECHNICAL FIELD The present invention relates to an audio device, and more particularly to a wireless outdoor audio device. Background Art A conventional outdoor sound is an audio frequency of an indoor amplifier 通过 passing through a step-up transformer 2, and a connection line is transmitted to the outside, and is connected to the horn 4 through an audio step-down transformer 3 to emit a sound. The drawback is that the connection line is complicated and the installation work is large. SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless outdoor audio device that is easy to install, reliable in operation, and capable of obtaining a variety of signals.
为实现上述目的， 本发明的技术解决方案是：  To achieve the above object, the technical solution of the present invention is:
本发明是一种无线室外音响设备，它由无线发射器和无线接收机 组成； 所述的无线发射器由音量控制电路、 频率发生器、 高频放大器 和带通滤波器組成，所述的音量控制电路对音量予加重后送至频率发 生器，频率发生器对信号进行调制后送至高频放大器放大， 带通滤波 器对经高频放大器放大的信号进行频率固定，通过天线发射出去； 所 述的无线接收机包括输入回路、 差频放大器、音频放大器、 太阳能电 池和喇叭，所述的输入回路对频率进行选择并将选择后的频率信号送 至差频放大器，差频放大器将高频变为中频、再将中频变为音频信号， 经音频放大器放大后从喇 p八输出， 所述的太阳能电池为电路提供电 源。  The invention relates to a wireless outdoor audio device, which is composed of a wireless transmitter and a wireless receiver; the wireless transmitter is composed of a volume control circuit, a frequency generator, a high frequency amplifier and a band pass filter, the volume The control circuit adds the volume to the frequency generator, and the frequency generator modulates the signal and sends it to the high-frequency amplifier for amplification. The band-pass filter fixes the signal amplified by the high-frequency amplifier and transmits it through the antenna. The wireless receiver includes an input loop, a difference frequency amplifier, an audio amplifier, a solar battery, and a horn. The input loop selects a frequency and sends the selected frequency signal to a difference frequency amplifier, and the difference frequency amplifier changes the high frequency. For the intermediate frequency, the intermediate frequency is converted into an audio signal, which is amplified by the audio amplifier and output from the rab eight, and the solar cell supplies power to the circuit.
所述的无线接收机有多部。  There are a plurality of wireless receivers.
在所述的无线发射器上设有音频信号输入接口。  An audio signal input interface is provided on the wireless transmitter.
在所述的无线发射器上设有 MP3接口、 MIC插口和收音机。 所迷的无线接收机还串接 ^蓄电池。  An MP3 interface, a MIC jack, and a radio are provided on the wireless transmitter. The wireless receiver is also connected in series with the battery.
所述的无线接收机中还包括带有低频滤波器的超重低音音箱，该 低频滤波器串接在超重低音音频放大器的输入端，将音频的中高频滤 掉只重现低频部分经音频放大器放大后从低音喇叭输出。  The wireless receiver further includes a subwoofer with a low frequency filter serially connected to the input end of the subwoofer audio amplifier, filtering the middle and high frequency of the audio to only reproduce the low frequency portion and being amplified by the audio amplifier. After output from the woofer.
采用上述方案后，本发明的无线发射器和无线接收机之间采用无 线的电连接方式， 并在无线接收机上同时使用太阳能电池和蓄电池， 由太阳能电池和蓄电池提供无线接收机稳定的工作电源，无需任何连 线（电源线或音响线）就能使户外音响可靠的工作， 大大方便了用户 的使用和安装，且扩大了其使用范围； 并可根据需要增加不同的输入 端口如 MIC、 MP3等使用更方便， 通过加装专用的超低音箱可提升 音响效果， 还可多分区使用进行分区广播。 After adopting the above solution, the wireless transmitter and the wireless receiver of the present invention adopt a wireless electrical connection manner, and simultaneously use a solar battery and a storage battery on the wireless receiver, and provide a stable working power supply of the wireless receiver by the solar battery and the storage battery. The outdoor audio can be reliably operated without any connection (power cord or audio cable), which greatly facilitates the user's use and installation, and expands its use range; and can add different inputs as needed. Ports such as MIC, MP3, etc. are more convenient to use, and the special ultra-low speaker can be added to enhance the sound effect, and multi-partition can also be used for partition broadcasting.
另， 该户外音响可安装在石雕等户外装饰物内或庭院的各个角 落， 使其具有各种美丽的造型。  In addition, the outdoor sound can be installed in outdoor decorations such as stone carvings or in various corners of the courtyard, so that it has various beautiful shapes.
下面结合附图和具体实施例对本发明作进一步的说明。 附图说明 图 1是习用室外音响结构示意图；  The invention will now be further described with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a conventional outdoor acoustic structure;
图 2是本发明的无线接收机电路图；  Figure 2 is a circuit diagram of a wireless receiver of the present invention;
图 3是本发明的无线发射器笫一种实施例的电路图；  3 is a circuit diagram of an embodiment of a wireless transmitter of the present invention;
图 4是本发明的无线发射器笫二种实施例的电路图；  4 is a circuit diagram of two embodiments of a wireless transmitter of the present invention;
图 5是本发明的无线发射器第三种实施例的电路图；  Figure 5 is a circuit diagram of a third embodiment of the wireless transmitter of the present invention;
图 6是本发明的无线发射器第四种实施例的电路图；  Figure 6 is a circuit diagram of a fourth embodiment of the wireless transmitter of the present invention;
图 7 -图 11是本发明五种实施方式的示意图；  7 to 11 are schematic views of five embodiments of the present invention;
图 12是本发明的无线接收机具有增强低音音质的电路图。 具体实施方式 本发明有五种方式通过无线发射器 1 将音频信号转换无线电波 传至室外的无线接收机 2上，室外无线接收机 2将无线电信号转换成 音频信号， 经： it :大从喇 p八发出声音。 这五种方式如下：  Figure 12 is a circuit diagram of a wireless receiver of the present invention having enhanced bass sound quality. DETAILED DESCRIPTION OF THE INVENTION The present invention has five ways to transmit audio signal converted radio waves to the outdoor wireless receiver 2 through the wireless transmitter 1, and the outdoor wireless receiver 2 converts the radio signals into audio signals, by: it: p eight sounds. The five ways are as follows:
第一种方式（如图 Ί所示 )是将 CD、 DVD等音频信号 F通过无 线发射器 1传至室外无线接收机 2， 启动音响的筒单方案， 可同时连 接 1个或数个室外音响。 其电路采用图 3所示的电路结构。  The first method (as shown in FIG. )) is to transmit an audio signal F such as a CD or a DVD to the outdoor wireless receiver 2 through the wireless transmitter 1, and activate the sound of the single program, and can connect one or several outdoor sounds at the same time. . The circuit uses the circuit structure shown in Figure 3.
第二种方式 （如图 8 所示）是在原有基础上增加了收音功能 A /FM的无线发射器 1B, 可使本发明在音频和收音之间选择。 其电 路采用图 4所示的电路结构。  The second mode (shown in Figure 8) is a wireless transmitter 1B that adds a radio function A/FM to the original, which allows the present invention to choose between audio and radio. The circuit is constructed using the circuit shown in Figure 4.
第三、 四种方式（如图 9、 图 10所示）是在前二种方式的基础 上增加了可直接将 MP3机插在本无线发射器上 1C的连接座和 MC 插口，这样本无线发射器 1就可同时选择音频信号、 A /FM收音机、 MP3播放、 MIC讲话。 其电路采用图 5所示的电路结构。  The third and fourth modes (as shown in Fig. 9 and Fig. 10) are based on the first two methods. The connector and the MC socket that can directly insert the MP3 player into the 1C of the wireless transmitter are added. The transmitter 1 can simultaneously select audio signals, A/FM radio, MP3 playback, and MIC talk. The circuit uses the circuit structure shown in FIG.
笫五种方式（如图 11所示）是在以上不同的音频输入方式的基 础上，可将无线发射器 1D分成若干的发射频率， 同时或者分开发射， 使处于不同分区的无线接收机 2同时或者单独播放无线发射器 1传出 的音频信号， 已达到同时或者分区播放的效果。 其电路采用图 6所示 的电路结构。  The five methods (as shown in Figure 11) are based on the above different audio input methods. The wireless transmitter 1D can be divided into several transmission frequencies, or simultaneously transmitted separately, so that the wireless receivers 2 in different zones simultaneously Or the audio signal transmitted by the wireless transmitter 1 is played separately, and the effect of simultaneous or partition playback has been achieved. The circuit uses the circuit structure shown in Figure 6.
为了实现上迷五种播放方式， 本发明设计以下电路结构。 如图 2、 图 3所示， 本发明是一种无线室外音响设备， 它由无线 发射器 1和无线接收机 2组成。 In order to realize the five playback modes, the present invention designs the following circuit structure. As shown in Figs. 2 and 3, the present invention is a wireless outdoor audio device which is composed of a wireless transmitter 1 and a wireless receiver 2.
如图 3所示， 所述的无线发射器 1由音量控制电路 11、 频率发 生器 12、 高频放大器 13、 带通滤波器 14和天线 15组成。 所述的音 量控制电路 11对音量予加重后送至频率发生器 12， 频率发生器 12 对信号进行调制后送至高频放大器 13放大，带通滤波器 14对经高频 放大器 13放大的信号进行频率固定， 通过天线 15发射出去。 所述的 无线发射器 1上还设有音频信号接口 AUX、 收音机接口 AM FM、 MP3接口、 MIC插口。所述的频率发生器 12包括音频振荡器 G和放 大器 A1, 该放大器 A1可釆用 2SC9D18芯片。 所述的高频放大器 13 包括放大器 A2, 该放大器 A2可采用 SH10芯片。  As shown in Fig. 3, the wireless transmitter 1 is composed of a volume control circuit 11, a frequency generator 12, a high frequency amplifier 13, a band pass filter 14, and an antenna 15. The volume control circuit 11 adds the volume to the frequency generator 12, and the frequency generator 12 modulates the signal and sends it to the high frequency amplifier 13 for amplification. The bandpass filter 14 amplifies the signal amplified by the high frequency amplifier 13. The frequency is fixed and transmitted through the antenna 15. The wireless transmitter 1 further has an audio signal interface AUX, a radio interface AM FM, an MP3 interface, and a MIC jack. The frequency generator 12 includes an audio oscillator G and an amplifier A1, which can use a 2SC9D18 chip. The high frequency amplifier 13 includes an amplifier A2 which can employ an SH10 chip.
如图 2所示， 所述的无线接收机 2包括输入回路 21、 差频放大 器 22、 音频放大器 23、 太阳能电池 24、 蓄电池 25和喇叭 26, 所述 的输入回路 21对频率进行选择并将选择后的频率信号送至差频放大 器 22, 差频放大器 22将高频变为中频、 再将中频变为音频信号， 经 音频放大器 23放大后从喇叭 26输出。 在本无线接收机 2, 采用太阳 能电池 24和蓄电池 25为电路提供电源。 所述的输入回路 21和差频 放大器 22包括运算放大器 IC1, 该运算放大器 IC1可采用 CX1191S 芯片。 所述的音频放大器 23包括运算放大器 IC2, 该运算放大器 IC2 可采用 TDA2822芯片。 所述的无线接收机 2可有多部， 可安装在户 外不同的地方， 如石雕内、 亭子上等。  As shown in FIG. 2, the wireless receiver 2 includes an input circuit 21, a difference frequency amplifier 22, an audio amplifier 23, a solar battery 24, a battery 25, and a horn 26. The input circuit 21 selects a frequency and selects The subsequent frequency signal is sent to the difference frequency amplifier 22, and the difference frequency amplifier 22 changes the high frequency to the intermediate frequency, and then changes the intermediate frequency to an audio signal, which is amplified by the audio amplifier 23 and output from the speaker 26. In the present wireless receiver 2, the solar battery 24 and the battery 25 are used to supply power to the circuit. The input loop 21 and the difference frequency amplifier 22 include an operational amplifier IC1, which can be a CX1191S chip. The audio amplifier 23 includes an operational amplifier IC2, which can be a TDA2822 chip. The wireless receiver 2 can have multiple parts and can be installed in different places, such as stone carvings, pavilions, and the like.
另，在上述无线接收机可专门设计成为超低音箱的接收机。如图 12所示， 所述的无线接收机 3包括输入回路 31、 差频放大器 32、 低 频滤波器 33、 音频放大器 34、 太阳能电池 35、 蓄电池 36和低音喇 叭 37， 所迷的输入回路 31对频率进行选择并将选择后的频率信号送 至差频放大器 32, 差频放大器 32将高频变为中频、 再将中频变为音 频信号， 所述的低频滤波器 33串接在音频放大器 34的输入端， 经低 频滤波器 33滤波及音频放大器 34放大后，将音频的中高频滤掉只重 现低频部分从低音喇叭 36输出。 在本无线接收机 3中， 采用太阳能 电池 35和蓄电池 36为电路提供电源。 所迷的输入回路 31和差频放 大器 32包括运算放大器 IC1， 该运算放大器 IC1可采用 CX1191S芯 片。 所述的音频放大器 34 包括运算放大器 IC2, 该运算放大器 IC2 可采用 TDA2822芯片， 低频滤波器 33可采用 LC滤波器。 使用该无 线接收机可更好的体现低音音质， 增加整体系统音响的播放效果。  In addition, the above wireless receiver can be specially designed as a receiver for ultra-low speakers. As shown in FIG. 12, the wireless receiver 3 includes an input circuit 31, a difference frequency amplifier 32, a low frequency filter 33, an audio amplifier 34, a solar battery 35, a battery 36, and a woofer 37. The frequency is selected and the selected frequency signal is sent to the difference frequency amplifier 32. The difference frequency amplifier 32 changes the high frequency to an intermediate frequency, and then changes the intermediate frequency to an audio signal. The low frequency filter 33 is serially connected to the audio amplifier 34. The input terminal is filtered by the low frequency filter 33 and amplified by the audio amplifier 34, and the middle and high frequency of the audio is filtered out to reproduce only the low frequency portion and output from the woofer 36. In the present wireless receiver 3, a solar battery 35 and a battery 36 are used to supply power to the circuit. The input circuit 31 and the difference frequency amplifier 32 include an operational amplifier IC1, which can be a CX1191S chip. The audio amplifier 34 includes an operational amplifier IC2, the operational amplifier IC2 can employ a TDA2822 chip, and the low frequency filter 33 can employ an LC filter. The use of this wireless receiver can better reflect the bass sound quality and increase the overall system sound playback.

Claims

权 利 要 求 Rights request
1、 一种无线室外音响设备， 其特征在于： 它由无线发射器和无 线接收机组成; 所述的无线发射器由音量控制电路、频率发生器、 高 频放大器和带通滤波器组成，所述的音量控制电路对音量预加重后送 至频率发生器， 频率发生器对信号进行调制后送至高频放大器放大， 带通滤波器对经高频放大器放大的信号进行频率固定，通过天线发射 出去； 所迷的无线接收机包括输入回路、 差频放大器、 音频放大器、 太阳能电池和喇叭，所述的输入回路对频率进行选择并将选择后的频 率信号送至差频放大器，差频放大器将高频变为中频、再将中频变为 音频信号，经音频放大器放大后从喇八输出， 所述的太阳能电池为电 路提供电源。 A wireless outdoor audio device, characterized in that: it is composed of a wireless transmitter and a wireless receiver; the wireless transmitter is composed of a volume control circuit, a frequency generator, a high frequency amplifier and a band pass filter. The volume control circuit pre-emphasizes the volume and sends it to the frequency generator. The frequency generator modulates the signal and sends it to the high-frequency amplifier for amplification. The band-pass filter fixes the signal amplified by the high-frequency amplifier and transmits it through the antenna. The wireless receiver includes an input loop, a difference frequency amplifier, an audio amplifier, a solar battery, and a horn. The input loop selects a frequency and sends the selected frequency signal to the difference frequency amplifier, and the difference frequency amplifier will The high frequency becomes the intermediate frequency, and then the intermediate frequency is changed into an audio signal, which is amplified by the audio amplifier and output from the rabba, and the solar cell supplies power to the circuit.
2、 根据权利要求 1所述的无线室外音响设备， 其特征在于： 所 述的无线接收机有多部。  2. The wireless outdoor audio equipment according to claim 1, wherein: said wireless receiver has a plurality of parts.
3、 根据权利要求 1所述的无线室外音响设备， 其特征在于： 在 所述的无线发射器上设有音频信号输入接口。  3. The wireless outdoor audio device according to claim 1, wherein: said wireless transmitter is provided with an audio signal input interface.
4、 根据权利要求 1所述的无线室外音响设备， 其特征在于： 在 所述的无线发射器上设有 MP3接口、 MC插口和收音机。  4. The wireless outdoor audio device according to claim 1, wherein: said wireless transmitter is provided with an MP3 interface, an MC jack, and a radio.
5、 根据权利要求 1所述的无线室外音响设备， 其特征在于： 所 迷的无线接收机还串接有蓄电池。  The wireless outdoor audio device according to claim 1, wherein the wireless receiver is further connected in series with a battery.
6、 根据权利要求 1所述的无线室外音响设备， 其特征在于： 所 迷的无线接收机中还包括带有低频滤波器的超重低音音箱 ,该低频滤 波器串接在超重低音音频放大器的输入端，将音频的中高频滤掉只重 现低频部分经音频放大器放大后从低音喇 p八输出。  6. The wireless outdoor audio device according to claim 1, wherein: the wireless receiver further comprises a subwoofer with a low frequency filter serially connected to the input of the subwoofer audio amplifier. At the end, the middle and high frequency of the audio is filtered out, and only the low frequency portion is reproduced by the audio amplifier, and then output from the bass pu p8.
PCT/CN2005/001109 2005-07-01 2005-07-25 A wireless outdoor sound equipment WO2007003074A1 (en)

Applications Claiming Priority (2)

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CNU2005200610884U CN2859976Y (en) 2005-07-01 2005-07-01 Wireless outdoor sonic equipment
CN200520061088.4 2005-07-01

Publications (1)

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WO2007003074A1 true WO2007003074A1 (en) 2007-01-11

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Cited By (1)

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CN101938684A (en) * 2010-09-17 2011-01-05 文创太阳能(福建)科技有限公司 Movable solar energy loudspeaker box

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Publication number Priority date Publication date Assignee Title
CN201210750Y (en) * 2008-05-12 2009-03-18 陈文良 Improved solar energy wireless sound system
CN102026076A (en) * 2009-09-11 2011-04-20 台湾驻极体电子股份有限公司 Solar electret transducer and low-energy consumption electret transducer

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CN2269025Y (en) * 1995-12-08 1997-11-26 陈杉员 Speaker without distribution wires
CN2372857Y (en) * 1999-04-07 2000-04-05 张少持 Wireless signal transmitting-receiving active loudspeaker box
CN1305272A (en) * 2001-03-02 2001-07-25 成都天奥实业有限公司 Wireless sound system

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN2269025Y (en) * 1995-12-08 1997-11-26 陈杉员 Speaker without distribution wires
CN2372857Y (en) * 1999-04-07 2000-04-05 张少持 Wireless signal transmitting-receiving active loudspeaker box
CN1305272A (en) * 2001-03-02 2001-07-25 成都天奥实业有限公司 Wireless sound system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101938684A (en) * 2010-09-17 2011-01-05 文创太阳能(福建)科技有限公司 Movable solar energy loudspeaker box

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