Detection device for safety valve assembly
A technology of safety valves and detection devices, which is applied in the direction of measuring devices, testing of mechanical components, testing of machine/structural components, etc., can solve the problems of complex structure, low precision, large volume, etc., and achieve good versatility and low processing cost , the effect of simple structure
Inactive Publication Date: 2011-09-07
NORTHWESTERN POLYTECHNICAL UNIV
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[0004] In order to overcome the disadvantages of low precision, large volume, large power consumption or complex structure and high cost of the existing technology, the present invention provides a detection device based on an electromechanical intelligent control system. The device is simple in structure, smart and low in cost, and can accurately measure The control pressure, stroke and working temperature of the valve, and the real-time measured data can be displayed through the liquid crystal, the valve control pressure and stroke curve can be drawn, and the test report can be finally generated
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0021] figure 1 It is a functional block diagram of the present invention. The safety valve assembly detection device includes a safety valve detection unit, a sensor group, a data acquisition and conditioning module, a control unit, a liquid crystal display module, a self-test and self-calibration module, a watchdog module, a data transmission module, and an acousto-optic prompt module. The present invention uses a precise sensor group to detect the safety valve, then inputs the measured weak signal into the data conditioning acquisition module, performs pre-filtering, isolation, amplification, anti-aliasing filtering and analog-to-digital conversion on the signal into a digital voltage signal, Input to the control module; in the control module, the corresponding working threshold is preset for the safety valve, and the digital voltage signal from the...
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The invention discloses a detection device for a safety valve assembly, wherein a translational platform and two angular brackets are distributed on a stander; a displacement sensor and a force sensor are fixed on the translational platform through the angular brackets; the pressure for opening a valve is detected by the force sensor through a linear bearing; the displacement sensor is connected to an adjustable bolt so as to detect the stroke of the opened valve; the output of the displacement sensor and the force sensor is input to a control module through a data conditioning and acquisition module, and displayed through a liquid crystal display (LCD) module; the data is transmitted to a host computer through a data transmission module; a self-detection and self-calibration module is controlled to automatically detect by the control module; and the control module can be normally operated again by a watchdog module when the operation of the control module is out of control. The detection device for the safety valve assembly has a simple structure, good universality, a low manufacture cost, is easy to manufacture and assemble, is compact, lightweight and portable in size; in addition, the detection device is movable.
Description
technical field [0001] The invention relates to a detection device for a safety valve assembly, in particular to the detection of a safety valve of an aircraft fuel servo system. Background technique [0002] The safety valve assembly is a safety device to prevent system damage caused by excessive pressure difference (positive or negative pressure) inside and outside the fluid system. It is an important part of the aircraft engine, with many types and large quantities, and it is also one of the most important repair accessories. In China, there are too many incidents caused by the failure of the safety valve, which poses a serious threat to the aviation safety of our country. [0003] Through the investigation of many domestic aircraft manufacturers, it is found that the detection of safety valves mostly adopts detection devices based on hydraulic systems, such as traditional hydraulic detection devices and detection devices based on complex hydraulic systems. The traditio...
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IPC IPC(8): G01M13/00
Inventor 李洲洋雷少坤容建刚谷文韬
Owner NORTHWESTERN POLYTECHNICAL UNIV