The invention relates to the field of bolt detection, in particular to an automatic bolt looseness detection and
alarm device. The device main body comprises a power supply
assembly and a plurality of alarm assemblies, each alarm
assembly comprises an indicating lamp and a
buzzer alarm, the indicating lamps are used for detecting looseness of bolts and nuts, the
buzzer alarms are used for detecting breakage of the bolts, and the power supply
assembly comprises a solar panel. According to the invention, the
electromagnetic induction principle and the circuit on-off change are utilized to realize the automatic detection and alarm functions of the two key states of bolt loosening and fracture, and a reliable monitoring means is provided for guaranteeing the
safe operation of facilities and equipment. Different power supply connection
modes are designed for fixed parts made of different materials, higher universality and applicability are achieved, limitation of the material properties of the fixed parts is avoided, and the application range is wider. A power supply assembly composed of a solar panel, a charging controller and a storage battery is adopted,
clean energy solar energy is used for supplying power, and external power supplies such as an external mains supply are not needed.