The significance for this paper is to realize digitized modulation and demodulation by means of the software. It is based on the audio-card of PC.

本文的意义在于采用软件方法实现了数字化调制与解调，它是基于PC机声卡来完成的。

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The function of the system is to acquire signal, communicate with PC, generate the frequency modulation signal, control detector's work mode.

系统具备对信号的采集、信号的实时处理、与PC机串口通信、产生变频调制信号及控制探测器主被动模式转换等功能。

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The hardware of this system includes pressure transducer board array, signal modulation circuit, signal capture board and PC.

系统硬件包括压力传感器平板阵、信号调理电路、信号采集板以及计算机系统。

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