Pulsing signal recognition device and method

Abstract

This invention discloses an identifying device for pulse signals including a base line calculation module, a subtracter and a peak value identifying module, in which, said base line calculation module receives data of pulses during a discontinuous period to form a data array and compute base line value according to the data array, said subtracter receives pulse data and the base line value and detracts the base line value with the pulse data to get related pulse data to be output to the identifying module, which can identify data directly not necessary to store data based on the parallel process to digital logic circuit and carries out identification to input pulse signals according to the identifying rule and output peak values meeting the rule in all the pulses in a stipulated time period and gives the corresponding writing enable signals of the peak value data used in storing operation.

Description

【Technical field】 [0001] The invention relates to a particle measurement system, in particular to a pulse signal identification device and method used in the particle measurement system to identify particles according to the peak value of the pulse signal. 【Background technique】 [0002] In the particle measurement system, when the measured particle passes, the sensor will generate a corresponding analog pulse signal, which is amplified and filtered, and then converted into a digital pulse signal, called pulse data. Then the application analyzes the pulse data. First, a threshold is set for the pulse data. The signal below the threshold is discarded, and the pulse data above the threshold is stored. Then, the pulse data is extracted from the beginning, and analyzed and identified according to the predetermined judgment criteria. Identify all pulse peaks in the pulse data. Then according to the proportional relationship between the pulse peak value and the volume of the part...

AI Technical Summary

Problems solved by technology

① Signals that cannot adapt to baseline fluctuations

If the baseline fluctuates, it is possible to treat the floating baseline as a pulse, causing errors; on the other hand, the pulse is superimposed on the baseline, if the actual value of the pulse height does not change, but the baseline fluctuates, then the absolute value of the pulse height will also change

While the existing technology cannot adapt to this situation, it cannot extract the relative pulse height

The way to make up for this defect in the existing technology is usually to lower the threshold and store the baseline to participate in the analysis and identification, but the data volume of the baseline far exceeds the pulse, which makes the storage space increase sharply, and the time overhead for analysis and identification is also quite large. become too expensive to achieve

②It cannot adapt to high-speed pulse signals. When the sampling rate increases, the amount of data increases greatly, the requirements for storage space become large, and the processing time is also very large, and the real-time performance becomes poor.

Images