Bubble monitoring device of hydraulic transmission pipeline
A monitoring device and hydraulic transmission technology, applied in measurement devices, re-radiation of sound waves, instruments, etc., can solve the problem that the air content of hydraulic transmission pipeline cannot be predicted in real time, and achieve the effect of good real-time performance, simple implementation and convenient monitoring.
Inactive Publication Date: 2013-02-13
BEIJING MECHANICAL EQUIP INST
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[0004] The purpose of the present invention is to provide a hydraulic transmission pipeline air bubble monitoring device to solve the problem that the air content in the hydraulic transmission pipeline cannot be predicted in real time
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[0019] A hydraulic transmission pipeline air bubble monitoring device, comprising: an insulating pipeline 1, a metal electrode 2, a signal processing circuit 3, and a data acquisition and processing module 4, and also includes: an image reconstruction computer 5, wherein the signal processing circuit 3 includes: a sinusoidal exciter 6. Transmission interface 8, first switch 7, operational amplifier 9, real part direction multiplier 10, imaginary part direction multiplier 12, real part direction low-pass filter 11, imaginary part direction low-pass filter 13, second switch 14. Control bus 16 and data bus 15; data acquisition and processing module 4, including: USB communicator 21, digital signal processor 18, complex programmable logic device 19, general array logic 20 and analog / digital converter 17.
[0020] The number of metal electrodes 2 and signal processing circuits 3 are both N, and each metal electrode 2 is installed on the outer wall of the insulating pipe 1 at equal i...
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The invention discloses a bubble monitoring device of a hydraulic transmission pipeline, comprising an insulation pipeline (1), metal electrodes (2), signal processing circuits (3), a data collecting and processing module (4) and an image reconstructing computer (5), wherein the signal processing circuits (3) and the data collecting and processing module (4) are connected through flat cables; the data collecting and processing module (4) and the image reconstructing computer (5) are connected through a USB (Universal Serial Bus) interface; the metal electrodes (2) are equidistantly arranged on the outer wall of the insulation pipeline (1) along the axial direction; and each metal electrode (2) is fixedly connected with the respective corresponding signal processing circuit (3). According to the invention, the calculation and the imaging of the capacitance of the measured medium in the pipeline are realized through phase-sensitive demodulation, so that the monitoring effect is realized. The device disclosed by the invention has the characteristics of low cost, excellent operability and high response speed at the same time and has the advantages of simpleness and firmness in structural design, good ageing resistance and capability of supporting long-time continuous use.
Description
technical field [0001] The invention relates to a monitoring device, in particular to a monitoring device for air bubbles in a hydraulic transmission pipeline. Background technique [0002] At least 75% of hydraulic system failures are caused by oil pollution, which seriously affects the stability of the hydraulic system. As a major source of oil pollution, excessive air content in the oil will cause the corresponding characteristics of the hydraulic system to deteriorate, the oil temperature will rise, cavitation will occur, and system vibration and noise will be caused, which will seriously affect the operation of the system. [0003] Traditional air bubble detection devices are mainly composed of insulating pipes, metal electrodes, signal processing circuits, and data acquisition and processing modules. Most of the measurement methods use laser Doppler technology, optical fiber technology, nuclear magnetic resonance technology, microwave technology, and ultrasonic technol...
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Inventor 胡源渊李建冬贾正伟吴庆勋李昕奇
Owner BEIJING MECHANICAL EQUIP INST