Small integration ultrasonic device for measuring pressure outside pipe with small pipe diameter

Abstract

The invention relates to a small integration ultrasonic device for measuring pressure outside a pipe with a small pipe diameter. The device comprises a probe, an ultrasonic emitting circuit, a receiving circuit, a data acquisition circuit, a control and data processing unit and a special probe clamp. The probe clamp is provided with a matching circular hole for installation of the probe and a U-type groove fixed in the axis direction of the pipe and capable of achieving automatic centering, the radius of the probe clamp is the same as that of the to-be-detected pipe, and automatic centering of the probe clamp in the axis direction of the pipe is guaranteed through the U-type groove. According to the ultrasonic emitting circuit, a low resistor and a field effect tube with an ultra-high-speed voltage changing gradient are used as quick electronic switches. According to the data acquisition circuit, high-speed sampling and processing are achieved through a high-speed A/D chip, a micro controller and a hyper-synchronous FIFO chip, the micro controller is a main control chip, and special software achieving empirical mode decomposition and noise reduction, power management and multi-mode power control is solidified in the main control chip. Compared with the prior art, the device is small in size, convenient to install and use and few in safety hidden risks, power consumption of the data acquisition circuit is low, and echo signals are stable.

Description

technical field [0001] The invention belongs to the technical field of pressure measurement, and relates to an ultrasonic pressure measurement device outside a tube, in particular to a small-scale integrated small-diameter ultrasonic pressure measurement device outside a tube. Background technique [0002] In large-scale equipment such as lifting equipment, reloading and transportation equipment, and construction machinery, the hydraulic system is the core mechanism of transmission and control. As an important parameter of the hydraulic system, pressure is directly related to the operating status of the system. Therefore, detecting the pressure of the hydraulic system is an important topic. . Although there are many kinds of pressure gauges on the market, most of them are intrusive detection, which is inconvenient to operate. Ultrasonic pressure measurement outside the pipe has a broad application prospect in engineering hydraulic machinery due to its advantages of non-cont...

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Problems solved by technology

So far, after searching the literature, there is no ultrasonic external pressure measuring device with small size, lo

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