| 摘要 |
A data collection method for continuous physical quantities such as temperature and pressure, comprising: inputting a voltage signal, u, representing a continuous physical quantity; acquiring through an analog sampling channel (1) a sampling signal, uk, of an analog voltage, the sampling frequency being f?h; digital low-pass filtering uk (6) to acquire a voltage signal (uk) that has undergone low-pass filtering; re-sampling (uk) to acquire a re-sampling signal, uj, re-sampling frequency, f?y, being the same as the sampling frequency required by the application end, and the sampling frequency, f?h, is M times the re-sampling frequency, f?y; storing and outputting the re-sampling signal, uj, to the application end. Provided is a corresponding device. The present invention lowers the cost of analog sampling channels. uj, replacing uj, can be directly applied to industrial automation. In particular, the outputted uj no longer contains a transient value, and can satisfy the input quantity requirements of steady-state models, and can inhibit random interference and enhance measurement precision. |
