超导量子干涉器是测量弱磁场的极灵敏的仪器,凡是这种磁场起重要作用的地方,尤其在医学、心理学、地球物理学和基本度量学方面,它正在获得广泛的应用,将来还可能用它来预报地震等。超导量子干涉器是约瑟夫逊效应的一种应用。这种效应出现在通常称为约瑟夫逊结的地方,约瑟夫逊结即超导电路中二元件之间的一种弱接点,它可由一个很薄的绝缘氧化层构成,或者干脆是因超导体表面稍有些粗糙而引起的接触不良。在维持超导电性的极冷的环境中(即 Superconducting quantum interference devices are very sensitive instruments for measuring weak magnetic fields. Where such magnetic fields play an important role, they are widely used, especially in medicine, psychology, geophysics and basic metrology. In the future, It may be used to predict earthquakes and so on. Superconducting quantum interference is an application of Josephson effect. This effect occurs at what is commonly referred to as the Josephson junction, a weak junction between two components in a Josephson junction, superconducting circuit, which can be made of a very thin insulating oxide layer, or simply because the surface of the superconductor Some rough and caused poor contact. In an extremely cold environment that maintains superconductivity (ie