目的 通过对比试验，明确简易型冲击记录仪（鲸货物保镖）相比精密型路谱仪（SAVER）在数据测量上的精度差异。方法 首先研究基于跌落冲击状态下包装件跌落高度的计算理论。其次制作试验包装件进行实验室自由跌落试验，利用鲸货物保镖与SAVER进行试验数据的测量。再次进行数据分析，获取鲸货物保镖加速度峰值与跌落高度的关系，以及对SAVER而言包装材料的恢复系数。最后进行实际运输试验，分别基于2种仪器数据进行跌落高度计算，进而分析简易型冲击记录仪数据测量精度的可靠性。结果 跌落高度分析表明，基于鲸货物保镖的跌落高度低于基于SAVER数据，处于数据分析的危险侧；鲸货物保镖数据出现“扎堆”现象，说明该仪器的采集精度欠佳。可靠性分析表明，2种仪器在累计概率90%以上的跌落高度几乎相同；2种设备所计算的跌落高度在大于20 cm时，其累计概率均接近100%。结论 虽然鲸货物保镖所测数据单一，数据精度较精密型仪器有差距，但其数据转换为跌落高度具有可靠性，可用于运输包装设计。

The work aims to clarify the precision difference between Cargo Bodyguard (a lite-performance shock recorder) and SAVER (a high-performance road spectrometer) on data measurement through comparative tests. Firstly, the calculation theories of the package drop height based on the drop shock state were studied. Secondly, a testing package was designed for the free fall tests in laboratory. The experimental data were measured by Cargo Bodyguard and SAVER, respectively. Thirdly, data analyses were conducted to determine the relationship between peak acceleration and drop height for Cargo Bodyguard and the restitution coefficient of packaging materials for SAVER. Finally, an actual transportation test was carried out. The drop heights were calculated respectively based on the two instruments and thus the reliability of the data measurement accuracy of the lite-performance shock recorder was analyzed. The drop height analysis indicated that, the drop heights based on Cargo Bodyguard were lower than those based on SAVER, and the former was in the dangerous zone of data analysis. Moreover, data of Cargo Bodyguard showed a “data-gather” issue that meant collecting precision of such instrument was not admirable. The reliability analysis showed that the two instruments had almost the same drop height when the cumulative probability was bigger than 90%. In addition, the cumulative probabilities were nearly 100% when the drop height calculated by two kinds of equipment was greater than 20 cm. Although the data measured by Cargo Bodyguard are monotonous and the data precision is different from the high-performance instruments, the drop height converted from Cargo Bodyguard is reliable, and can be used in the transportation packaging design.