该项目利用MODEM的远程计算机数据交换技术 ,将微型冷库各目标位的温度模拟信号通过下位机A/D转换器转换为数据信号 ,远端微型冷库用户 (下位机 )以有线电话主叫网络中心上位机 ,上位机借助拨号上网原理 ,通过普通电话以通讯网读取数据信息 ,只需 5min的长途电话即可为各地任一用户设备进行远程开通、巡检、维护和升级等工作。 The project uses MODEM remote computer data exchange technology, the micro-cold storage of the target temperature analog signal through the next bit of A / D converter is converted to data signals, the remote mini-refrigerator users (lower computer) to the cable telephone network center PC, the host computer with dial-up Internet access through the ordinary telephone to read data communications network, just 5min long-distance calls for any user equipment for remote opening, inspection, maintenance and upgrades and so on.