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丁欣-超短波报警器设计
中文摘要
超短波(ultra-short wave)亦称甚高频(VHF)波、米波(波长范围为1米至10米),频率从30兆赫至300M赫的无线电波,传插频带宽,短距离传播依靠电磁的辐射特性,用于电视广播和无线话筒传送音频信号,采用锐方向性的天线可补偿传输过程的衰减ltra-Short Wave, also known as Very High Frequency (VHF) wave o UHF (wavelength range 1-10 m), is radio wave of frequency from 30 MHz to 300M Hz, which has a wide communication bandwidth, and a short-range communication depends on characteristics of electromagnetic radiation. It’s used for television broadcasting and transmission of audio signals of wireless microphones, with sharp directional transmission antenna, which compensates the attenuation.
The Ultra-Short Wave Alarm is formed by two parts, a transmitter and a receiver. The transmitter produces a harmonic oscillation and an FM oscillation. And the circuit of the receiver is basically used for receiving the signals sent by the FM transmitter. It contains a complementary audio oscillator formed by six ignore gates. There’s only one integrated module in this circuit, the six-ignore-gate integrated module CD4069, which consists of six COS / MOS inverting circuit, mainly used for general-purpose inverter.
When the signals from the transmitter is received, the low-frequency oscillator and the complementary oscillator stop working, the speaker does not sound. Once the signals from the transmitter can not be received, the low-frequency oscillator starts to work, and the circuit of the complementary oscillator controlled by the 1 Hz positive impulse, which is output inversely by the ignore gates, makes a hasty alarm of beep… beep…, until the object returns to the range of control, when the alarm stops.
Keywords: Ultra-Short Wave; Receiver; Transmitter; Oscillator; Alarm
目录
第一章 概述 5
1.1 设计背景及意义 5
1.2 设计任务及要求 5
1.3 设计方案比较 6
1.4 超短波报警器的工作原理 6
第二章 单元电路设计 7
2.1多谐振荡器电路设计 7
2.2超再生接收电路设计 9
2.3放大电路设计 11
2.4低频振荡电路设计 12
2.5互补音频振荡器电路设计 14
第三章 整体硬件电路设计 16
3.1 发射机系统设计 16
3.2 接收机系统设计 16
3.3 元器件的选用 17
3.3.1 电阻器 17
3.3.2 电容器 17
3.3.3 电感器 18
3.3.4 二极管 18
3.3.5三极管 19
第四章 应用软件简介 20
4.1 Protel99SE的系统组成 20
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