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(jiān)測系統(tǒng)用于監(jiān)測設(shè)置在金屬結(jié)構(gòu)如管道系統(tǒng)1的陽極2的完整性。設(shè)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(dāng)?shù)男盘枴＝邮招盘柕闹行恼?依賴于觀察陽極2當(dāng)時的完整性。如果陽極2缺失或沒有接收到預(yù)期的信號，即可檢測出故障在陽極2.陷波濾波器5被串聯(lián)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(tǒng)但不干擾。