Nova Patents
EP2720002B1

Continuous physical quantity data collection method and device

Abstract

This record has no abstract on file.

EP2720002B1, drawing sheet 1
Sheet 1 of 32

Term

5.7 yearsleft in the term

Expires 11 June 2032.

  1. Priority
  2. Filed
  3. Granted
  4. Today
  5. Expires

11 claims: 2 independent, 9 dependent

  1. 1
    A method for acquiring continuous physical signals comprising:inputting a voltage signal u representing a continuous physical signal;obtaining a sampled signal u k by sampling the voltage signal u through an analog sampling channel (1), wherein the sampling frequency is f Δh ;obtaining a resample signal u j by resampling the sampled signal u k , wherein the resampling frequency f Δy is specified by its application;the method further comprising: performing digital low-pass filtering (6;7, 8) on the sampled signal u k to obtain ũ k before the resampling;resampling (5) the ũ k to obtain a resample signal ũ j ;and storing (2) resample signal ũ j and outputting (3) it to the application terminal, characterised in that said digital low-pass filtering is an averaging algorithm (7, 8) with variable structure that: judging u k is in the steady state or in the transient state then giving a sign F, if F=1, u k is in the transient state, and if F=0, u k is in the steady state;when F=0, obtaining an average value u k by using the sampled signal u k ;when F=1, the average value u k being an unreachable value of the sampled signal u k in practical application, resampling, obtain u j from u k , and eliminating the unreachable value in the u j as bad data after arriving at the application terminal;if F turns to 0 from 1, resetting the average value u k to zero and set k=1.
  2. 8
    A device for acquiring continuous physical signals comprising:an analog sampling channel (1), used for implementing analog sampling on the voltage signal u of the input continuous physical signal wherein the sampling frequency being f Δh , and outputting the sampled signal u k ;a resampling switch (5), used for resampling the sampled signal u k to obtain the resample signal u j and outputting the resample signal u j to a register (2);the register (2), used for storing the resample signal u j ;a bus (3), used for controlling the register (2) to output data u j to the bus (3) and outputting data u j via the bus (3) to the application terminal;and a timing controller (4), used for controlling analog sampling channel (1) and the resampling switch (5);and a digital low-pass filter (6), used for receiving the sampled signal u k from the analog sampling channel (1), implementing low-pass filtering on them and outputting the low-pass filtered signal ũ k ;the cutoff frequency fc of the digital low-pass filter (6) being smaller than 0.5 times of the resampling frequency f Δy , and the cutoff frequency fc of the analog low-pass filter in the analog sampling channel is smaller than 0.5 times of the sampling frequency f Δh . and characterized in that said digital low-pass filter (6) comprises an averaging unit (7) and a judging unit (8): said judging unit (8) inputs the sampled signal u k from the analog sampling channel (1), and obtains a sign F and output it to the averaging unit (7);when the sampled signal u k is in the steady state, F=0, otherwise when the sampled signal u k is in the transient state, F=1;said averaging unit (7) inputs the sampled signal u k from the analog sampling channel (1), and calculates the average value u k when F=0;assigns an unreachable value of the u k to the average value u k when F=1;and the unreachable value is eliminated as bad data after arriving at the application terminal;if F turns to 0 from 1, said average value u k is reset and let k=1.
Independent claims2