Signal base line processing equipment and processing method
A baseline processing and signal technology, applied in the direction of measuring devices, signal transmission systems, electrical signal transmission systems, etc., can solve the problems of pulling down pulses, affecting accurate identification of pulse peaks, affecting baseline identification, etc., achieving good versatility and easy debugging , the effect of high computing efficiency
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Embodiment 1
[0051] Please refer to FIG. 5 , the baseline processing device includes an A / D sampling unit, a baseline extraction unit, a phase compensation unit, a first subtractor, a second subtractor and a comparator. The A / D sampling unit is used to sample the counting signal to obtain sampled data; the baseline extraction unit inputs the sampled data, and is used to sort the N sampled data according to the size according to the sampling order, and output the N sampled data less than or equal to Any sampling data A of the intermediate value, wherein the distribution width of the N sampling data in the digital counting signal is much larger than the single pulse width in the digital counting signal, smaller than the width of the baseline drift, and larger than the width of the distribution within the distribution width 2 times the sum of all pulse widths; the phase compensation unit is used to input sample data and output sample data B in the order of first-in-first-out, the width of the ...
Embodiment 2
[0066] Please refer to FIG. 14 , the baseline processing device includes an A / D sampling unit, a baseline extraction unit, a phase compensation unit, a history record FIFO, a first subtractor, a second subtractor, a comparator and an output FIFO. The history record FIFO width is N, and its function is to store the data that needs to be discarded. When the sampling data of N points is input and the baseline extraction unit calculates the baseline of the N / 2 point by the median filter method, the A / D sampling unit will Output the data of the N+1th point to the baseline extraction unit, the phase compensation unit and the history record FIFO, and output the first sampling data C in the digital counting signal in the history record FIFO to the baseline extraction unit, and the baseline extraction unit receives the history record After the first sampling data C output by the FIFO, the same sampling data as the first sampling data C is deleted, so that the sampling data will not be i...
Embodiment 3
[0069] Please refer to FIG. 15 , this embodiment is a more preferred embodiment based on Embodiments 1 and 2, and the baseline extraction unit includes a processor and a memory. The processor is used to receive N sample data, and use the value of the data in the N sample data to be sorted as a storage space address in the memory, and use the number of data with the same value as the storage value of the address corresponding to the storage space, and set The sampling data to be sorted is stored in the storage space, and the processor is used to accumulate the stored value of the storage space from the lowest address to the high address direction, and determine that the accumulated value is equal to the current accumulated value of (1 / 2N-P) Addresses N1 and P can be selected as integers greater than or equal to 0 and less than 1 / 2N according to the characteristics of the signal, but they cannot be changed during the entire process. The sampling data A is equal to the current acc...
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