Calibration method and device for lubricating oil pollution degree sensor

Abstract

The invention discloses a method and a device for calibrating a lubricating oil pollution degree sensor in the technical field of sensor calibration. The calibration method of the lubricating oil pollution degree sensor comprises the following steps: respectively calculating standard voltage thresholds of the lubricating oil pollution degree sensor to be calibrated in a first standard particle suspension and a second standard particle suspension, and recording the standard voltage thresholds as a first standard voltage threshold and a second standard voltage threshold; and calculating an average value of the first standard voltage threshold value and the second standard voltage threshold value, obtaining a calibrated voltage threshold value of the lubricating oil pollution degree sensor to be calibrated, and completing calibration of the lubricating oil pollution degree sensor. The calibration process does not depend on expert experience, the calibration efficiency is high, and automatic batch calibration can be achieved.

Description

technical field [0001] The invention belongs to the technical field of sensor calibration, and in particular relates to a calibration method and device for a lubricating oil pollution degree sensor. Background technique [0002] The working system of construction machinery is mainly based on the hydraulic system. The hydraulic system has particularly high requirements on the pollution degree of the lubricating oil. About 75% of the faults in the hydraulic system are caused by the oil pollution. Therefore, the pollution degree of the lubricating oil is monitored in real time. It is of great significance to avoid equipment failure and improve work efficiency. At present, the performance of pollution degree sensors provided by various manufacturers in the market varies, and the counting accuracy cannot meet the actual needs. Or due to long use time, aging of electronic components, wear and tear of optical components, etc., the accuracy is reduced. In the above cases, the poll...

AI Technical Summary

Problems solved by technology

At present, the performance of the pollution degree sensors provided by various manufacturers in the market is uneven, and the counting accuracy cannot meet the actual needs

Or due to long-term use, aging of electronic components, wear of optical components, etc., the accuracy will decrease

In the above cases, the pollution degree sensor needs to be calibrated before it can be used. The existing calibration methods mainly have the following problems: (1) By analyzing the indication error of the sensor to be tested, the pollution degree deviation and slope are used to correct the pollution to be measured For the data of the pollution degree sensor, it is necessary to ensure that the test flow rate of the oil circuit of the standard pollution degree sensor and the oil circuit of the pollution degree sensor to be tested is the same, and it is necessary to install flow meters, pumps and other devices; and to test the serialized standard particle suspension, The operation time is long and the cost is high; (2) when manual calibration is performed according to expert experience, a large number of actual measured values ​​and theoretical values ​​are required, and the accuracy after calibration is difficult to meet the requirements of use; (3) the existing calibration methods cannot Carry out high-volume sensor calibration with a low level of automation

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