▎ 摘　　要

NOVELTY - The lock has a ball (6) whose lower part is fixed at a periphery part of a ball pressure sensor. A photoelectric sensor (7) is formed with a lock hole (1). A lock core is connected with the ball pressure sensor and the photoelectric sensor. A processor detects time sequence characteristic of a signal according to the pressure sensor and the photoelectric sensor. The pressure sensor detects a signal numerical value for judging whether illegal unlocking action is occurred. The processor is provided with a first detecting unit. The photoelectric sensor is provided with a second detecting unit. A cylinder (10) is provided with a graphene pressure sensor (12). USE - Graphene theft-proof night lock. ADVANTAGE - The lock easily realizes error detection process. DESCRIPTION OF DRAWING(S) - The drawing shows a front view of a graphene theft-proof night lock. Lock hole (1) Ball (6) Photoelectric sensor (7) Cylinder (10) Graphene pressure sensor (12)