An anode monitoring system for monitoring the integrity of anodes 2 provided on a metallic structure such as a pipeline system 1. A signal circuit Sn including the pipeline 1 and one of the anodes 2 is set up and appropriate signals are looked for at a central station 4. Reception of the signal at the central station 4 is dependent on the integrity of the anode 2 under inspection at that time. If the anode 2 is missing or defective the expected signal is not received and thus the fault in the anode 2 can be detected. A notch filter 5 is inserted in series between each anode 2 and the pipeline 1. The filter 5 provides a high impedance which can be signalled across but does not interfere with the cathodic protection system.

 

　　

　　阳极监测系统用于监测设置在金属结构如管道系统1的阳极2的完整性。设置一个包括管道1和一个阳极2的信号电路Sn并且在中心站4寻找适当的信号。接收信号的中心站4依赖于观察阳极2当时的完整性。如果阳极2缺失或没有接收到预期的信号，即可检测出故障在阳极2.陷波滤波器5被串联插入各阳极2和管线1间。滤波器5提供了一个高阻抗，可以表示整个阴极保护系统但不干扰。