External equivalent device used after electric bridge of countercurrent sensor breaks and equivalent regeneration method

The invention relates to the technical field of handling of breakage failures of a sensing electric bridge inside an insertion type countercurrent sensor and particularly discloses an external equivalent device used after an electric bridge of a countercurrent sensor breaks and an equivalent regeneration method. According to the external equivalent device used after the electric bridge of the countercurrent sensor breaks, the collector electrode of a triode in the device is connected with a node A through a resistor R5, and the base electrode of the triode is connected to a node A after being sequentially connected with a resistor R2 and a resistor R1 in series; the base electrode of the triode is also connected with a node E through a resistor R3; a circuit between the resistor R1 and the resistor R2 is directly connected with a node F through a circuit; the emitter electrode of the triode is directly connected with a node D; a circuit between the collector electrode of the triode and the resistor R5 is directly connected with a node B; a circuit between the collector electrode of the triode and the resistor R5 is connected with a node C through a resistor R6. According to the external equivalent device used after the electric bridge of a countercurrent sensor breaks and the equivalent regeneration method, the countercurrent sensor function can be regenerated equivalently outside a faulted sensor, continuous proceeding of a centrifugal cascading uranium enrichment is not interrupted, the countercurrent sensor function and electric signal output are recovered online, and the method is simple and easy to implement.