Wall-mounted loud-speaking talkback terminal and loud-speaking talkback system

An intercom terminal and wall-mounted technology, which is applied in the amplification system, electrical components, etc., can solve the problems of sound interruption, prone to whistling, low signal-to-noise ratio of wireless amplification, and reduce the superposition of power supply and ground noise. The effect of reducing the mutual interference of audio sources and improving the signal-to-noise ratio

CN104869518AInactive Publication Date: 2015-08-26湖南康通电子股份有限公司
7 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-08-26
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The embodiment of the invention provides a wall-mounted loud-speaking talkback terminal and a loud-speaking talkback system. A hardware circuit board of the wall-mounted loud-speaking talkback terminal comprises a power supply board, an audio signal processing power amplifying board and a digital board, wherein the power supply board comprises two paths of isolated power supplies; the audio signal processing power amplifying board is connected with the power supply board through two paths of power supply input / output interfaces; and the digital board is used for supplying power to the audio signal power processing amplifying board through connection with the other path of power supply input / output interface on the audio signal processing power amplifying board, and is connected with the audio signal processing amplifying board through the audio signal input / output interface and a control configuration interface. According to the wall-mounted loud-speaking talkback terminal provided by the embodiment of the invention, power supply-ground partition is performed on each path of audio signal, so that mutual interference among different paths of sound sources and power supply-ground superposition can be reduced, and the signal to noise ratios of the audio signals are effectively increased.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The embodiment of the present invention relates to a sound reinforcement intercom technology, in particular to a wall-mounted sound reinforcement intercom terminal and a sound reinforcement intercom system. Background technique

[0002] Voice intercom is one of the necessary functions in enterprise security systems. With the continuous improvement of technology, voice intercom also plays an increasingly important role in the entire security system, and is widely used in education, electricity, banks, Chemical industry, metallurgy, wharf and other workplaces that need to amplify and call the walkie-talkie.

[0003] The wall-mounted amplified intercom terminal is the most commonly used amplified intercom terminal equipment in the education system (such as the application in the listening test), usually with network, local, wireless audio and other amplified and network intercom functions. At present, the wall-mounted PA intercom terminals mainly have th...

Examples

Embodiment 1

[0052] figure 1 A schematic structural diagram of the hardware circuit board of Embodiment 1 of the wall-mounted sound reinforcement intercom terminal provided by the embodiment of the present invention, as shown in figure 1 As shown, the hardware circuit board of the terminal includes: a power board 10, an audio signal processing power amplifier board 20 and a digital board 30, wherein:

[0053] The power supply board 10 includes two isolated power supplies, which are respectively used to supply power to the audio signal processing power amplifier board 20 and the digital board 30;

[0054] The audio signal processing power amplifier board 20 is connected to the power board 10 through two power supply input / output interfaces 100 and 200, and is used to receive an external audio signal and perform amplification and filtering processing on it. for supplying power to the audio signal processing power amplifier board;

[0055] The digital board is connected to the audio signal ...

Embodiment 2

[0058] figure 2 The schematic diagram of the hardware circuit board structure of the second embodiment of the wall-mounted sound amplifying intercom terminal provided by the embodiment of the present invention. On the basis of the first embodiment, the second embodiment further provides the detailed structure of each circuit board, as shown in figure 2 Shown:

[0059] The audio signal processing power amplifier board 20 includes:

[0060] The first power supply module 21 is connected to one of the power supplies 100 on the power supply board, and is used to directly supply power to the audio signal processing power amplifier board;

[0061] The second power supply module 22 is configured to supply power to the digital board by docking with the power module on the digital board;

[0062] An external audio signal receiver 23, configured to receive an external audio signal;

[0063] Audio signal amplification / filter 24, connected with the audio signal receiver 23, for amplif...

Embodiment 3

[0081] image 3 The structural diagram of the hardware circuit board of the first embodiment of the wall-mounted sound reinforcement intercom terminal provided by the embodiment of the present invention, the third embodiment is based on the second embodiment, and the audio signal processing power amplifier board is added with a rectifier amplifier, specifically as follows image 3 As shown, the audio signal processing power amplifier board 20 also includes:

[0082] The rectifying amplifier 240 is connected with the audio signal amplifier / filter 24, and is used to rectify and amplify the audio signal processed by the audio signal amplifier / filter 24, and then send it to the digital audio signal through the audio signal input / output interface 28. The board 30 enables the microcontroller 32 to detect the audio signal to decide whether to switch channels. For example, after the local and bluetooth signals are amplified and filtered, they are sent to the channel switching module ...