低待机功耗高效率银行用语音防盗报警器的研制

发布时间：2018-06-26 00:59

  本文选题：语音防盗报警器 + 防盗　； 参考：《延边大学》2017年硕士论文

【摘要】：银行防盗报警系统是银行安防系统中的重要组成部分,由报警信号检测部分,控制部分,报警信号的发出部分组成。本论文中主要研究报警器中控制部分和语音报警信号的发出部分,在分析了现有的各种用于银行和商业场所的防盗报警系统的主机原理与构造,以及电路系统设计之后,找出了不足之处,并提出了新的电路系统设计方法,设计了一种具有低待机功耗高效率的语音防盗报警器。首先,为了提高主机电源的转换效率,减小电源体积,降低整机的功耗,本学位论文基于反激式DC-DC开关电源变换器,分别设计了待机、报警两种工作模式的开关电源。基于TNY274设计的半波整流方式的低功耗待机电源,在待机状态时工作,以最大限度降低待机功耗。基于TOP223Y设计的恒压恒流型主电源,当作为报警模式的供电电源时,为负载提供恒定的输出电压;当作为蓄电池的充电器时,能提供恒定的输出电流。做到了主、副电源无压差自动切换,既保证了供电电压的稳定性,还优化了电路设计。其次,在功率放大部分,利用电流型PWM控制芯片KA3525设计输出电压可调的跟踪型动态直流电源,以及利用两个互补型三极管和运放LM324设计出的特殊线性功率驱动级,二者结合使用,组成工作电压可变的线性功率放大器,从而大大减小损耗,提高效率和短路时快速保护特性。最后,还设计了系统自检功能,包括语音芯片,功率放大器,充电电池的状态等。检测功率放大器的直流工作状态和交流工作状态时,为了防止扬声器发出很大的声音,用1OKHz以上的音频信号进行检测。本学位论文制作了语音防盗报警器的样机,并对其性能进行了测试与分析。实测数据表明,这种低待机功耗高效率的语音防盗报警器整体的待机功耗在0.1W以下,基于KA3525跟踪型动态直流电源的平均效率达到92%,工作电压改变的线性功率驱动级平均效率达到91%,工作电压可变的线性功率放大器的效率达到84%,整机效率达到72%,相对于普通的语音防盗报警器,大大降低了功耗,提高了效率和产品稳定性,减小了体积,节约成本。
[Abstract]:Bank security alarm system is an important part of bank security system, which is composed of alarm signal detection part, control part and alarm signal sending part. In this paper, the control part of the alarm and the sending out of the voice alarm signal are studied. After analyzing the principle and construction of various existing anti-theft alarm system used in banks and commercial places, and the design of the electric circuit system, the paper mainly studies the control part of the alarm device and the sending part of the voice alarm signal. A new design method of circuit system is proposed, and a kind of speech anti-theft alarm with low standby power and high efficiency is designed. Firstly, in order to improve the efficiency of power conversion, reduce the volume of power supply and reduce the power consumption of the whole machine, based on flyback DC-DC switching power converter, this thesis designs two kinds of switching power supply of standby mode and alarm mode respectively. The low power standby power supply based on TNY274 half-wave rectifier works in standby state to minimize standby power consumption. The constant voltage and constant current main power supply based on Top223Y provides constant output voltage for the load when it is used as a power supply in alarm mode and a constant output current when it is used as the charger of the battery. The main and secondary power supply is switched automatically without voltage difference, which not only ensures the stability of the supply voltage, but also optimizes the circuit design. Secondly, in the majority of the power amplifier, a tracking dynamic DC power supply with adjustable output voltage is designed by using the current-mode PWM control chip KA3525, and a special linear power driving stage is designed by using two complementary Triode and operational Amplifier LM324. A linear power amplifier with variable working voltage is made up of both of them, which greatly reduces the loss and improves the efficiency and the fast protection performance in short circuit. Finally, the system self-test function is designed, including voice chip, power amplifier, rechargeable battery state and so on. In order to prevent the loudspeaker from making a loud sound, the audio signal above 1OKHz is used to detect the DC and AC working state of the power amplifier. In this thesis, the prototype of speech alarm is made, and its performance is tested and analyzed. The measured data show that the overall standby power of this kind of low standby power and high efficiency speech alarm is less than 0.1 W. The average efficiency of the tracking dynamic DC power supply based on KA3525 is 92, the average efficiency of the linear power driving stage with the change of the working voltage is 91, the efficiency of the linear power amplifier with variable working voltage is 84 and the efficiency of the whole power amplifier is 72. In the ordinary voice alarm, It greatly reduces power consumption, improves efficiency and product stability, reduces volume and saves cost.
【学位授予单位】：延边大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP277
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本文编号：2068323