Abstract:

In order to perform on-line coal element contents analysis based on NIPGA (Neutron Induced Prompt Gamma-ray Analysis), a program of C# for automatic control and parsing spectrum is compiled. FileSystemWatcher is used to watch whether a spectrum document is produced, whose data is read by StreamReader. Then the data is smoothed by a 5-point quadratic polynomial. The sum count of eleven channels is used for finding the peak position. The contents of carbon, hydrogen and oxygen in coal are computed by the linear regression equations. The program can compute the element contents and can control the hardware of the analyzer, such as neutron detector, Multi-channel pulse analyzer, gamma-ray detector and D-T neutron generator. On-line test results indicate that the equipment failure rate caused by the program is almost zero, and the time of parsing spectrum is less than 1 second which can meet the requirement of on-line coal element contents analysis.

Key words: neutron induced prompt gamma-ray analysis(NIPGA), coal, parsing spectrum, automatic control