贴膜式Ni-Cr换能元设计及性能研究
基金项目:
国家技术基础项目（JZX7J202311BZ003000）
Design and Performance Study of Film-applied Ni-Cr Transducer Elements
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摘要:通过热压工艺将5 μm的Ni-Cr薄膜附着在聚酰亚胺薄膜上制备了贴膜式Ni-Cr薄膜，采用激光刻蚀加工工艺制备了贴膜式Ni-Cr换能元电桥，仿真优化设计了蝶形、S形换能元电桥，并开展了2种形状电桥的贴膜式Ni-Cr换能元的伏安特性、最大不熔断电流、50 ms脉冲恒流电爆特性以及发火特性试验研究。研究结果表明：桥区长度为3 mm的换能元电桥在1 A 5 min恒流激励后桥区温度最低；贴膜式Ni-Cr换能元在33 μF电容放电时，随着充电电压的升高断桥时间缩短，蝶形和S形未发生断桥的电压分别为16，20 V；蝶形和S形换能元在5 min恒流脉冲输入下的最大不熔断电流分别为1.3，1.2 A；在50 ms脉冲恒流电爆时，随着施加电流幅度的不断增加，其工作电压也不断增高，其断桥时间越来越短，S形换能元和蝶形换能元分别在2.4，2.3 A时电桥未发生爆炸；33 μF、28 V电容放电下贴膜式Ni-Cr换能元可以点燃斯蒂芬酸铅，并正常发火。
Abstract:Through the hot pressing process, the 5 μm Ni-Cr film was attached to the polyimide film to prepare a Ni-Cr film, the film-applied Ni-Cr transducer bridge was prepared using laser etching process, the dimensions of butterfly bridge area and S-shaped bridge area were optimized by simulation, and the tests of volt-ampere characteristics, the maximum non-fusing current, 50 ms pulse constant current explosion characteristics and the ignition characteristics of the film-applied Ni-Cr transducer elements with two shapes of bridge area were conducted. The results show that : the temperature of transducer element bridge under 1 A 5 min constant current excitation is the lowest; Under 33 μF capacitor discharge, with the increase of charge voltage, the bridge break time decreases, the non-break voltage for butterfly and S-shaped bridge is 16 V and 20 V, respectively; Under 5 min constant current pulse input, the maximum non-fusing current of butterfly and S-shaped transducer element is 1.3 A and 1.2 A, respectively; In the 50 ms impulse constant current electric explosion test, with the amplitude of the applied current increase , the operating voltage also increases, and the bridge break time is shortened, the S-shaped transducer and the butterfly transducer do not explode at 2.4 A and 2.3 A, respectively; The film applied Ni-Cr transducer can ignite the lead styphnate, and can fire normally under 33 μF, 28 V capicitor discharge.
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