Experiment table for mass calibration of oil pressure sensor

Abstract

The invention relates to a calibration experiment table wherein the experiment table can be used for mass calibration of oil pressure sensors. The experiment table comprises a pressure generator, thermotanks, solenoid valve switches, an electric gas pressure regulating valve, to-be-calibrated pressure sensors and a computer system. The pressure generator is used as a pressure signal source and various pressures in automobile oil are simulated; different temperature conditions are obtained by controlling and adjusting the thermotanks; the electric gas pressure regulating valve is controlled to debug pressures with different numerical values on the different thermotank temperature conditions according to a certain proportion; the pressures are respectively input to all the to-be-calibrated pressure sensors so as to obtain pressures and corresponding temperatures, wherein the pressures and corresponding temperatures are output by the sensors; therefore, the whole calibration process of the sensors is completed. According to the invention, the experiment table has advantages of high integrated level, simple operation, easiness for control and low cost; and moreover, many sensors can be calibrated simultaneously; therefore, the provided experiment table is one that is suitable for mass calibration.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a batch calibration test bench for engine oil pressure sensors, which can easily and quickly calibrate a plurality of sensors at the same time. Background technique [0002] Pressure sensors play an extremely important role in the performance of the vehicle's control system, such as oil pressure sensors, intake manifold pressure sensors, automotive air suspension pressure sensors, etc. The long-term use of the car may cause its performance to decline. This requires good calibration techniques to calibrate the sensors in use frequently to determine whether the error of the pressure sensor used exceeds the standard. [0003] The calibration method of the general pressure sensor is to provide a series of standard pressure by the force gauge, add it to the sensor, and read the corresponding value by the standard meter according to the output type of the AD conversion circuit of the sensor, thu...

AI Technical Summary

Problems solved by technology

The calibration technology of general pressure sensors has the following problems: First, automotive sensors, especially engine oil pressure sensors, need to withstand a wide range of temperature and pressure changes during the use of automobiles, and the operating environment is relatively harsh, which often affects the sensor performance. Detection is very necessary, but the current calibration technology cannot evaluate the calibration quality, because the calibration process and parameter calculation are carried out separately, and the calibration quality can only be evaluated during the error analysis process of the calibration parameters, and the calibration means are complicated There is a lag

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