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电子电话机长途锁控制电路剖析(下)
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作者 幸坤涛 《家电检修技术》 2001年第10期35-36,31,共3页
二、电子锁控电路为了克服机械锁在人为打开机壳将锁开关用导线接通,即可打长途电话的弊病,可采用电子锁。一般人想打开电子锁控电路并非易事,需搞清钥匙的元件参数,提高了破锁的难度。图2为HA688(Ⅱ)P/TDL型电话机电子锁原理图,其中,LM... 二、电子锁控电路为了克服机械锁在人为打开机壳将锁开关用导线接通,即可打长途电话的弊病,可采用电子锁。一般人想打开电子锁控电路并非易事,需搞清钥匙的元件参数,提高了破锁的难度。图2为HA688(Ⅱ)P/TDL型电话机电子锁原理图,其中,LM339为四运算放大器,开锁工具是内部配置与R79、R80同阻值的插塞头,不同话机R79、R80的参数是不一致的,只有所配插塞头内阻R79′、R80′必须与R79、R80分别相等时才能打开锁“0”装置。 展开更多
关键词 电子话机 电子锁控电路 长途
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Fault diagnosis method for switch control circuit based on SVM-AdaBoost 被引量:5
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作者 WANG Deng-fei CHEN Guang-wu +1 位作者 XING Dong-feng LIANG Dou-dou 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2020年第3期251-257,共7页
In order to realize the fault diagnosis of the control circuit of all-electronic computer interlocking system(ACIS)for railway signals,taking a five-wire switch electronic control module as an research object,we propo... In order to realize the fault diagnosis of the control circuit of all-electronic computer interlocking system(ACIS)for railway signals,taking a five-wire switch electronic control module as an research object,we propose a method of selecting the sample set of the basic classifier by roulette method and realizing fault diagnosis by using SVM-AdaBoost.The experimental results show that the proportion of basic classifier samples affects classification accuracy,which reaches the highest when the proportion is 85%.When selecting the sample set of basic classifier by roulette method,the fault diagnosis accuracy is generally higher than that of the maximum weight priority method.When the optimal proportion 85%is taken,the accuracy is highest up to 96.3%.More importantly,this way can better adapt to the critical data and improve the anti-interference ability of the algorithm,and therefore it provides a basis for fault diagnosis of ACIS. 展开更多
关键词 all-electronic computer interlocking system(ACIS) switch control circuit support vector machine(SVM) ADABOOST fault diagnosis
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