Signal simulation circuit and signal simulation device for lubricating oil metal filing sensor

Abstract

The invention provides a signal simulation circuit, which comprises: a microcontroller used for receiving a signal simulation instruction, the signal simulation instruction being associated with the physical properties of metal chips; the digital-to-analog converter that is connected to the output end of the microcontroller; the first low-pass filter that is connected to the output end of the digital-to-analog converter; a first multiplier, wherein the first input end of the first multiplier is connected to the output end of the first low-pass filter, and the second input end of the first multiplier is connected to an excitation signal; the first driver that is connected to the output end of the first multiplier, and the output end of the first driver is connected to the first excitation coil; the second low-pass filter that is connected to the output end of the digital-to-analog converter; a second multiplier, wherein the first input end of the second multiplier is connected to the output end of the second low-pass filter, and the second input end of the second multiplier is connected to the excitation signal; and the second driver that is connected to the output end of the secondmultiplier, and the output end of the second driver is connected to the second excitation coil.

Description

technical field [0001] The invention mainly relates to the field of signal processing, in particular to a signal simulation circuit and a signal simulation device for a lubricating oil metal chip sensor. Background technique [0002] Electromagnetic induction lubricating oil metal chip sensor is widely used in the monitoring of metal wear particles in the lubricating oil of aeroengines, gas turbines and other power plants, and is an important part of the power plant health management system. Through online monitoring of the size, type, quantity and other information of metal wear particles in lubricating oil, early wear conditions can be diagnosed before major wear failures occur in power devices, and the time from failure symptoms to serious failures can be predicted. It is of great significance to estimate the life of components and reduce the accident rate. [0003] figure 1 The basic principle of the electromagnetic induction lubricant oil metal chip sensor 100 is show...

AI Technical Summary

Problems solved by technology

However, due to the small size of metal shavings (several microns to hundreds of microns), it is difficult to obtain test particles of standard sized metal shavings, and it is difficult to accurately control the speed of metal shavings passing through the sensor

In addition, the particles in the oil are easy to lose and get stuck, which leads to high cost and large floor space for the test equipment of the lubricating oil system

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