Flow measurement device and method for self-feedback fault identification engine pulse working condition

Abstract

The invention provides a self-feedback fault identification engine pulse working condition flow measuring device and method. The device includes a detection unit and a function realization assistant unit; the detection unit includes a parameter detection module, a cylinder support component and a peripheral assembly; and the detection unit is connected to the function realization assistant unit. The parameter detection module is the core of the device, through the organic combination of the parameter detection module and other units, the high-precision measuring of propellant flow rates and the working state feedback and fault intelligent identification of flow measurement can be accomplished; and the parameter detection module includes an explosion-proof camera (2), a first pressure transducer (5), a force transducer (6), a first pressure meter (11), a temperature sensor (13), a liquid level sensor (17) and a propellant concentration sensor (27). The dual-mode measurement, mutual calibration and fault detection of the propellant flow rates can be performed by adopting a mass method and a volume method, so that the stability and reliability of propellant flow rate detection can beenhanced.

Description

technical field [0001] The invention relates to the fields of fault identification, sensor technology and measurement control, in particular to a flow measurement device and method for self-feedback fault identification of engine pulse working conditions. Background technique [0002] In the technical field of high-precision flow rate measurement of liquid rocket engines, the propellant flow rate directly reflects the performance parameters of the engine. Therefore, the propellant flow rate is an important detection index in the liquid rocket engine test process. At this stage, the propellant pulse flow rate of liquid rocket engines is widely measured by the volumetric tube method. The measurement accuracy is affected by the machining accuracy of the inner diameter of the volumetric tube. The volumetric tube is a slender cylindrical structure, and the high-precision machining of the inner diameter is relatively difficult. The density of the propellant is affected by external...

AI Technical Summary

Problems solved by technology

At this stage, the propellant pulse flow rate of liquid rocket engines is widely measured by the volumetric tube method. The measurement accuracy is affected by the machining accuracy of the inner diameter of the volumetric tube. The volumetric tube is a slender cylindrical structure, and the high-precision machining of the inner diameter is relatively difficult.

The density of the propellant is affected by external factors such as temperature and pressure, resulting in greater uncertainty in flow measurement

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