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计数电路
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  counting circuit
The results of this study indicate that in terms of efficiency, the Packard 2250Ca liquid scintillation spectrometer is sensitive to the scintillation cocktail employed for241Pu analysis, particularly when the burst counting circuit is enabled.
      
By the use of a photoelectric pickup and an electronic counting circuit, the instrument which has been described allows one to measure infrasonic damped oscillations with great accuracy.
      
A counting circuit, pulse/delay generator and waveform generator are used to synchronize the PIV system and the drop ejection process.
      
Changes were also made in the electronic counting circuit to enable a determination of ion intensities at high count rates.
      
Unlike encoders that require a counting circuit to track position, absolute encoders provide the correct data after a power-down event.
      


A way for getting the optimum heights of burst with doppler fuzes is givenin this paper, using computing circuit and the characteristics of doppler signalssuch as amptitude, doppler frequency and differentials of amplitude being obtainedwhen the fuze is going near to the ground. The amplitude differentials are pre-sented by using the counting circuit, and a way tor getting different correc-tions or burst heights for angles of projectile's striking is also given. The experi-ment results are shown in the paper....

A way for getting the optimum heights of burst with doppler fuzes is givenin this paper, using computing circuit and the characteristics of doppler signalssuch as amptitude, doppler frequency and differentials of amplitude being obtainedwhen the fuze is going near to the ground. The amplitude differentials are pre-sented by using the counting circuit, and a way tor getting different correc-tions or burst heights for angles of projectile's striking is also given. The experi-ment results are shown in the paper. The results of correction are proved to besatisfactory. This is a primary attempt at calcutating, integrating and numera-ting of the fuze circuits.

本文提出利用引信接近地面目标时多卜勒信号的特征量:幅度、多卜勒频率和幅值微分量经过计算电路取得最佳炸高的一种方案。并给出利用计数电路获得幅值增量和利用鉴频电路获得弹丸落角不同的炸高修正量的方法。文中给出了实验结果,证明修正效果良好。这也是对引信电路的计算化、集成化、数字化的一种初步尝试。

This paper analyzed the acoustic detection course and constructed the model for the detection, studied the factors that affect the detection probability by calculation via Monte Carlo method under different conditions. The solution shows that the sinking speed and the threshold value in the counter are the main influence while the others have a little influence.

该文对近炸引信采用声探测的过程进行了分析 ,建立了声探测的数学模型 ,采用蒙特卡罗法仿真计算了不同条件下深弹对目标的探测概率 ,以此研究影响声探测概率的因素。计算的结果表明 ,深弹的下沉速度和计数电路的预置值对探测概率有较大的影响 ,其他因素影响很小。

 
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