There are some faults for the current ultrasonic pressure measurement system

such as large volume

high-energy consumption

inconvenience

and it can not measure the pressure of liquid in tubule.A minitype integrative equipment in ultrasonic pressure measurement outside tubule is presented.Low-consumption design of emitting circuit and high-speed data collection-storage circuit were used to decrease the energy consumption of system

and a new kind of clamp was designed to improve the stability of echo signal.Lithium batteries as the power

and denoising with empirical mode decomposition (EMD) were used to improve the quality of ecio signal.At last

the pressure measurement model was established to calculate the pressure of liquid in tubule.The liquid in multiple tubules in different size were measured to test the measurement precision of system

and experimental results show that the equipment shows advantage on small volume

low-energy consumption and convenience.When we measure the pressure of liquid in tubule with diameter 14mm

the maximal measurement error is less than 8%.