摘要
这篇论文建议高带宽上的设计和研究线性频率打扫基于目前广泛地被使用的相互的电感联合的原则在高温度涉及无线被动压力传感器的读出单位模块的信号来源。操作原则线性基于直接数字的频率合成(DDS ) 打扫频率来源技术被介绍，并且顺序的控制过程在我们的系统要求了的硬件电路和逻辑的实现方法被认识到利用这种技术。通过在步价值的不同条件下面的实验，联系的 sweep 范围和其它在联合传感器的相互的电感的读出系统期间设计指示物，对回声频率信息的抽取方法的影响，抽取精确性，和其它被分析并且学习。线性频率的设计扫信号来源在 1 MHz100 MHz 的 sweep 宽度以内为 0.116 Hz 与 6 kHz， 1 kHz 的最小的步值，和频率的精确的回声频率变化分辨率被认识到。由于综合商业芯片的使用，线性扫频率来源为更高的应用程序值模块化的读出单位在尺寸，高工作频率，高分辨率和低步值被使小。
This paper proposes the design and research on the high bandwidth linear frequency sweep signal source involved in the readout unit module of the wireless passive pressure sensor in high temperature based on the principle of mutual inductance coupling which is applied widely at present. The operating principle of the linear sweep frequency source based on the direct digital frequency synthesis （DDS） technology is introduced, and the implementation method of the hardware circuit and logic sequential control process required in our system has been realized utilizing this technology. Through the experiments under different conditions of the step value, the sweep range and other related design indicators, the influence on the extraction method of resonance frequency information, extraction accuracy, and others during the readout system of the mutual inductance coupling sensor are analyzed and studied. The design of the linear frequency sweep signal source is realized with a resonance frequency change resolution of 6 kHz, a minimum step value of 1 kHz, and a precision of frequency for 0.116 Hz within the sweep width of 1 MHz - 100MHz. Due to the use of the integrated commercial chip, the linear sweep frequency source is made small in size, high working frequency, high resolution and low step values for the readout unit modularized of a higher application value.
