| 摘要 |
Provided is a method for acquiring continuous physical signal such as temperature, pressure and the like. The method comprises the following steps: inputting a voltage signal u representing continuous physical signal; obtaining a sampled signal u k of an analog voltage through an analog sampling channel (1), wherein the sampling frequency is f”h; performing digital low-pass filtering on the u k (6) to obtain a voltage signal u k subjected to low-pass filtering, and resampling the u k to obtain a resample signal u j , wherein the resampling frequency f”y is the same as the sampling frequency required by an application terminal and the sampling frequency f”h is M times of the resampling frequency f”y; and storing and outputting the resample signal u j to the application terminal. Provided also is a corresponding device. The cost of the analog sampling channel is lowered; the u j can be directly applied to industrial automation for substitution of the u j , especially output signals do not contain transient values, the requirements of a stable model on input quantity can be met, the random disturbance can be inhibited, and the measurement accuracy can be improved. |
