Water hammer pressure signal conditioning device suitable for LMS collection system

Abstract

The invention belongs to the technical field of liquid rocket engine tests, and particularly relates to a water hammer pressure signal conditioning device suitable for an LMS collection system. An existing water hammer pressure collection system is small in measurement channel capacity; the invention relates to the technical field of signal collection, in particular to a signal collection system,which solves the technical problems of low signal collection frequency, single system function and more occupied resources in the prior art, and comprises a mainframe box, a signal conditioner motherboard positioned in the mainframe box, a supply source and a supply source distribution circuit positioned on the signal conditioner motherboard, and n signal conditioning board cards inserted into thesignal conditioner motherboard. According to the device, multi-channel synchronous stable source supply and signal conditioning are carried out on the water hammer pressure sensor. In addition, the LMS collection system has a function of isolating different grounding signals, can effectively solve the problem of inter-signal interference caused by different signal grounding, and meets the requirement of the LMS collection system for water hammer pressure parameter measurement, thereby realizing the collection of water hammer pressure parameters by the LMS collection system.

Description

technical field [0001] The invention belongs to the technical field of liquid rocket engine tests, and in particular relates to a water hammer pressure signal conditioning device suitable for an LMS acquisition system. Background technique [0002] In the ground test of the liquid rocket engine, the water hammer pressure data is the main index to measure the instantaneous impact of the fluid on the pipelines and valves before the pump when the engine starts and shuts down, and reflects the impact of water hammer on the pipelines and valves before the pump on the test bench to a certain extent. At the same time, it provides an important reference for the material selection, welding process and strength design of key components such as the pump pipeline and valves. Accurate acquisition of water hammer pressure data is particularly important as the reliability requirements of liquid rocket engine ground tests are increasing day by day. As a transient signal, the water hammer p...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of the existing water hammer pressure acquisition system, such as small measurement channel capacity, low signal acquisition frequency, single system function, and large resource occupation, the present invention provides a water hammer pressure signal conditioning device, which is applied to LMS Acquisition system to realize the acquisition of water hammer pressure signals

Therefore, it is necessary to design a water hammer pressure signal conditioning device suitable for the LMS acquisition system, which not only has multi-channel synchronous and stable power supply and signal conditioning for the water hammer pressure sensor, but also has the isolation function between different grounding signals, which can effectively solve the problem. Interference between signals caused by different signal grounding to meet the requirements for accurate measurement of water hammer pressure parameters

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