A control method and system for automatic calibration of converter AD

Abstract

The invention relates to the field of embedded power electronic control software, and discloses a control method and system for AD automatic calibration of converters. Stored in the AD parameter data buffer register; when all the AD parameters are obtained and stored, obtain the calibration instruction, and enter the AD calibration process according to the obtained calibration instruction; when entering the AD calibration process, read all the parameters to be calibrated in real time The actual analog quantity of the point and the corresponding AD conversion digital quantity are filtered and calculated by the first-order low-pass filtering algorithm to obtain a stable effective digital quantity; the actual simulation of all the points to be calibrated is performed by the unary linear regression algorithm Quantity and corresponding significant digits are calculated to obtain the AD calibration coefficient and AD calibration zero point; if the AD calibration coefficient meets the preset calibration coefficient error range, the calibration is successful, and the AD calibration coefficient and AD calibration zero point are stored.

Description

technical field [0001] The invention relates to the field of embedded power electronic control software, more specifically, it relates to a control method and system for automatic calibration of converter AD. Background technique [0002] At present, there are a lot of analog signals in electronic equipment in rail transit. These analog signals are closely related to vehicle operation and safety. Therefore, the accuracy and measurement accuracy of these signals must be guaranteed in the equipment production process. The AD analog calibration has always been a problem that needs attention in the design and production process. [0003] At present, there are many solutions to deal with analog precision, such as: [0004] 1. Ensure the consistency of electronic devices; improve the accuracy of analog quantities by screening electronic devices, such as controlling the accuracy of the sampling unit's sensors, sampling resistors, operational amplifiers, and AD acquisition modules....

AI Technical Summary

Problems solved by technology

However, this method greatly increases the difficulty and cost of procurement, which is not conducive to mass production of products.

[0005] 2. Each AD analog quantity is individually configured with a calculation coefficient; this method is mainly to manually calculate the proportional coefficient and temperature zero drift of each AD, and then change and store the parameters of each AD through software, which seriously affects production efficiency. Also not conducive to software version management

This processing method reduces the accuracy of the equipment, affects the effect of on-site use, and will cause false alarms and misoperations of the equipment or fail to achieve monitoring functions. In severe cases, safety accidents may occur

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