Liquid Pressure Calibration Apparatus

A liquid pressure control method for a liquid pressure calibration apparatus, wherein the liquid pressure calibration apparatus comprises:

• a liquid pressure inlet port for introducing pressurized liquid;
• a liquid pressure output port for outputting pressurized liquid;
• a first liquid path having an input end and an output end, wherein the input end of the first liquid path is connected to the liquid pressure inlet port, and the output end of the first liquid path is connected to the liquid pressure outlet port;
• and
• a second liquid path having an input end and an output end and arranged in parallel with the first liquid path, wherein the input end of the second liquid path is connected to the liquid pressure inlet port, and the output end of the second liquid path is connected to the liquid pressure outlet port;
• wherein the method comprises:
• determining a target pressure that needs to be output;
• determining whether the target pressure value is greater than a pre-stored switching pressure;
• supplying pressure by the first liquid path if the target pressure value is greater than the pre-stored switching pressure;
• and
• supplying pressure by the second liquid path if the target pressure value is less than or equal to the pre-stored switching pressure.