Building public broadcasting system
A public broadcasting and building technology, applied in the direction of specific broadcasting applications, advanced technology, climate sustainability, etc., can solve problems such as the impact on people's daily life, increase casualties, reduce the chance of escape, etc., and achieve significant practical value, Easy-to-achieve, low-cost effects
Inactive Publication Date: 2016-06-22
SHANGHAI UNIV OF ENG SCI
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Problems solved by technology
But once the power amplifier fails, the entire public broadcasting system will not be able to operate normally, and it will not be able to broadcast information in time, which will affect people's daily life
Especially in special circumstances such as fires and earthquakes, if the broadcast cannot be broadcast immediately, it will reduce the chance of people escaping and increase casualties.
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[0014] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.
[0015] like figure 1 As shown, a building public address system provided by the present invention includes a loudspeaker 1 and an audio control system 2, and the audio control system 2 includes a memory 21, a first single-chip microcomputer 22, a first power amplifier 23, and a second power amplifier 24 , sine wave generator 25, transformer 26, digital signal processor 27 and second single-chip microcomputer 28, described first single-chip microcomputer 23 receives audio signal, and connects described memory 21, first power amplifier 23, second power amplifier 24 respectively and the second single-chip microcomputer 28; the sine wave generator 25, the first power amplifier 23, the transformer 26, the digital signal processor 27 and the second single-chip microcomputer 28 are connected in sequence; the first power amplifier 23 and the second power a...
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The invention discloses a building public broadcasting system. The system comprises a loudspeaker and an audio control system, the audio control system comprises a memory, a first single-chip microcomputer, a first power amplifier, a second power amplifier, a sine wave generator, a transformer, a digital signal processor, and a second single-chip microcomputer, the first single-chip microcomputer receives audio signals and is connected with the memory, the first power amplifier, the second power amplifier, and the second single-chip microcomputer, the sine wave generator, the first power amplifier, the transformer, the digital signal processor, and the second single-chip microcomputer are connected in sequence, and the first power amplifier and the second power amplifier are connected with the loudspeaker. According to the system, real-time detection of the power amplifier during operation can be realized, and the standby power amplifier can be automatically switched during faults of the power amplifier so that continuous and normal operation of the public broadcasting system can be guaranteed; besides, the system is advantaged by simple structure, low cost, and easy realization.
Description
technical field [0001] The invention relates to a building public broadcasting system. Background technique [0002] At present, the role of the public broadcasting system used in large buildings such as buildings is increasing day by day, and its core is reflected in the control of audio signals, mainly through the power amplifier to amplify the relatively weak signal input by the audio source equipment to generate a large enough current To push the speaker for sound playback. But once the power amplifier fails, the entire public broadcasting system will not be able to operate normally, and it will not be able to broadcast information in time, which will affect people's daily life. Especially in special circumstances such as fires and earthquakes, if broadcasting cannot be performed at the first time, the chances of people escaping will be reduced and casualties will be increased. Contents of the invention [0003] In view of the above-mentioned problems existing in the...
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IPC IPC(8): H04H20/61
CPCY02D30/70
Inventor 卓郑安陈丁卡洛斯王德寿
Owner SHANGHAI UNIV OF ENG SCI