通信设备：RS232或磁盘的心跳机制。

Communication devices: RS232 or heartbeat over disk.

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结合心跳策略和灰色预测方法，设计了一种动态心跳机制，并给出了预测模型和实时预测策略；

Combining heartbeat strategy with grey prediction method, a dynamic heartbeat strategy was designed, and the prediction model was presented, as well as a real-time prediction strategy.

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作为额外的安全措施，在用具和探测器之间有心跳机制，如果由于任何原因禁用了探测器，就会通知管理员。

As an additional security measure, there is a heartbeat between the appliance and the probe that will alert the administrator if the probe is disabled for any reason.

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