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.

 

　　

　　陽極監測系統用于監測設置在金屬結構如管道系統1的陽極2的完整性。設置一個包括管道1和一個陽極2的信號電路Sn并且在中心站4尋找適當的信號。接收信號的中心站4依賴于觀察陽極2當時的完整性。如果陽極2缺失或沒有接收到預期的信號，即可檢測出故障在陽極2.陷波濾波器5被串聯插入各陽極2和管線1間。濾波器5提供了一個高阻抗，可以表示整個陰極保護系統但不干擾。