Method for removing baseline drift from pulse wave signal
A baseline drift and pulse wave technology, applied in catheters and other directions, can solve problems such as baseline drift and power frequency interference, and achieve the effect of small calculation amount, low hardware requirements and reliable results
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[0025] The present invention will be further described below in conjunction with embodiment.
[0026] The method for removing the pulse wave baseline drift disclosed in the present invention can also be used for any periodic physiological signal to remove the baseline drift, such as electrocardiographic signals. The specific implementation of the method will be explained below with reference to the accompanying drawings.
[0027] The invention mainly includes two links, suppressing power frequency interference and removing baseline drift. Suppress power frequency interference by using the sliding mean filter method; remove the baseline drift by spline interpolation fitting method to remove.
[0028] Suppressing power frequency interference specifically includes the following steps:
[0029] 1. Collect a piece of pulse wave data, the sampling rate is 250Hz, and the number of sampling points is 1000;
[0030] 2. Select the coordinates of five adjacent points, and sum the avera...
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