数码管式闪光融合频率测试仪的试验验证  

Experimental validation of digit critical fuse frequency apparatus

作　　者：耿艳[1] 胡文东[1] 李晓京[1] 文治洪[1] 王涛[1] 韩文强[1] 

机构地区：[1]第四军医大学航空航天医学系,西安710032

出　　处：《中华航空航天医学杂志》2010年第2期103-106,共4页Chinese Journal of Aerospace Medicine

基　　金：国家自然科学基金委员会与中国民用航空总局联合资助项目〔60879007)

摘　　要：目的 通过对自行研制的数码管式闪光临界融合频率测试仪(digit critical fuse frequency apparatus,DCFFA)的测试结果进行分析,从而验证该仪器的适用性,为飞行疲劳的评价提供一种更客观、准确、可靠的方法.方法 本校21名男性学员自愿参加试验,用INCFF随机呈现数字'0'～'9',其闪烁频率随机为25～49 Hz内的奇数频率值,分别测量受试者的反应时间(reaction time,RT)和按键正确率,并根据正确率将受试者的测试频率值分为低于闪光临界融合频率(critical fuse frequency,CFF)组(正确率高于60%)、CFF组(正确率40%～60%)和高于CFF组(正确率低于40%),然后对3组的RT和正确率进行描述性统计分析、方差齐性检验和配对t检验.结果 用于受试者测试的频率值低于CFF值时,RT为(3.56±1.92)s;频率值接近于CFF时,RT为(4.23±2.11)s;频率值大于CFF时,RT为(2.99±1.91)s.频率值接近于CFF时的RT明显大于频率值高于CFF值时的RT,且差异有统计学意义(P＜0.01).结论 DCFFA能够较客观地测量出受试者的CFF,其结果准确可靠.Objective To validate the feasibility of the self developed digit critical fuse frequency apparatus (DCFFA) and suggest more objective, accurate and reliable measurement in fatigue evaluation. Methods Twenty-one male students were selected as subjects for the test where a 7-seg digit ('0' to '9') was randomly generated by DCFFA with odd frequency from 25-49 Hz. Subjects responded the digit by key pressing and the reaction time (RT) and accuracy of responding were recorded. Subject's critical fuse frequency (CFF) values were partitioned by accuracy (range from ＞60%, 40%-60% and ＜40%) as high CFF, CFF and low CFF group respectively. RT and accuracy were then analyzed by descriptive statistics, equality of variances and paired-sample t test. Results When the applied frequency was respectively lower or higher than CFF, the recorded RT was (3.56±1.92) sor (2.99±1.91) s. And when it was set around CFF, the RT [(4.23±2.11) s] was significantly higher than that in the frequency above CFF (P＜0.01). Conclusions The validation proved that DCFFA could objectively detect CFF with accurate and reliable measurement.

关 键 词：闪光融合 反应时间 研究 试验验证 

分 类 号：R686[医药卫生—骨科学]