Operating parameters in a hydraulic system, such as pressure, flow rate, and temperature, are non-electrical physical quantities. When measuring these parameters using general-purpose instruments via indirect methods, physical effects must first be utilized to convert these non-electrical quantities into electrical quantities. These quantities are then amplified, converted, and displayed. The measured parameter can then be represented and displayed as a converted electrical signal. This allows for the determination of whether the hydraulic system is faulty. However, this indirect measurement method requires various sensors, resulting in complex detection devices, large measurement errors, and a lack of intuitiveness, making it inconvenient for widespread field application.
By measuring the operating parameters at any desired point in the hydraulic system circuit and comparing them with the system's normal operating values, it is possible to determine whether the system's operating parameters are normal, whether a fault has occurred, and the location of the fault.
