原位焊接型单次试开密码鉴别电路

In-situ Soldering Type Single-try Discriminator Circuit

针对目前微机电系统密码锁中鉴别器结构复杂、可靠性不高的问题,提出了原位焊接型单次试开密码鉴别电路。该电路由焊接型TMS-OFF开关按照每级"二选一"的逻辑级联构成,焊接型TMS-OFF开关与具有熔断特性的保险丝按照装定密码对应的电路关系进行连接,构成了原位焊接型单次试开固态密码锁。综合利用焊接型TMS-OFF开关中OFF态到ON态单向切换的不可逆特性、保险丝的熔断特性、与装定密码对应的电路连接关系,实现了单次试开的功能。应用实例表明:利用焊接型TMS-OFF开关,控制电流、电压、频率、脉冲幅值而使电动执行器工作,分别构成电流型、电压型、频率型、脉冲型的固态密码锁,具有结构简单、易于制作、安全性高的优点,可用于要害系统、设施等的安全与保安应用中。

Aiming at the problems that the structure of discriminator in the current micro-electromechanical system combination lock was complex and the reliability of electronic combination locks was poor,an in-situ soldering single-try discrimination circuit was proposed.The circuit was composed of soldering TMS-OFF switches according to alternative logic of each stage and cascaded.The soldering TMS-OFF switches were connected with the fuse that has a feature of fusing to form an in-situ soldering and single-try solid combination lock according to corresponding relationship between setting password and the circuit.We utilized unidirectional irreversible characteristic of the soldering TMS-OFF switches from OFF state to the ON state,fusing characteristic of the fuse and corresponding relationship between setting password and the circuit to achieve function of single-try.Examples showed that the electric actuator would work when the soldering type TMS-OFF switches controlled voltage,current,frequency,and pulse amplitude,which constituted the voltage type,current type,frequency type,and pulse-type combination lock with the advantages of simple structure,easy fabrication and high safety that could be used in security applications such as high consequence system and facilities respectively.