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1984年7月,吉林地区煤田测井资料互检结果表明,大部分勘探队所测HGG曲线均在非线性区记录。霍林河区尤为严重,超出TYFZ-4型组合仪线性范围(一般为27万脉冲/分)8～9万脉冲/分。 这主要是使用的源强过大,使井下脉冲平均重复周期T变短,而计数率电路时间常数τ又大,不能满足T》3τ要的求,致使计数率电路产生非线性。如果减小源强,使井下脉冲平均重复周期增长,固然可以使HGG
In July 1984, coal logging data from each coalfield in Jilin Province showed that the HGG curves measured by most of the exploration teams were recorded in the nonlinear region. The Huolinhe area is particularly serious, exceeding the linear range of the TYFZ-4 combiner (typically 270,000 pulses / min) to 80,000 to 90,000 pulses per minute. This is mainly the use of the source intensity is too large, so that the average pulse repetition period T shortened, and the count rate circuit time constant τ is large, can not meet the requirements of T "3τ, resulting in count rate circuit nonlinear. If you reduce the source intensity, the average pulse repetition cycle growth, although it can make HGG