非对称基准物与被测物差压检漏系统试验研究

文章分析了环境温度变化对差压检漏系统的影响。通过建立差压检漏系统试验平台，研究了非对称基准物和被测物差压检漏系统零漂试验和被测物接标准漏孔试验。试验结果表明:对非对称基准物与低漏率的被测物产生的差压在滞后温度补偿后进行最小二乘拟合可以消除环境温度变化产生的干扰，同时线性补偿的效果更好，误差更小；不同容积的基准物对相同漏率的被测物差压曲线在温度补偿前没有线性，但温度补偿后都能获得明显的线性；滞后温度补偿与即时温度补偿获得的线性基本相同，但滞后温度补偿比即时温度补偿产生的标准差更小，误差更小；多点平均温度补偿比单点温度补偿的效果更好，误差更小。

Experimental study on differential pressure leak detection system with non-symmetrical reference container and test container

The effect of ambient temperature change upon differntial pressure leak detection system is investigated.The non-symmetrieal reference container and test container are used in differential pressure leak detection system.The results show that the temperature-induced differential pressure for non-symmetrieal reference container and test container with standard leakage can be eliminated by least squares fitting method after a lagged temperature colnpensation Moreover,linear compensation is shown to be better for redueing errors.The differential pressure curves with uni-leak test container against multi-size references exhibit obvious linearity only after the temperature compensation.Lagged temperature compensation shows the same linearity as the instant-temperaturecompensation,yet with reduced standard deviation and less error Average temperature compensation is better than single-point temperature compensation with respect to error