Elevator car accidental movement alarm device

The utility model provides an alarm device for accidental movement of an elevator car, which comprises an elevator control cabinet, a signal acquisition unit and a measurement unit, the measuring unitis installed in an elevator car. The signal acquisition unit is arranged on a back plate of the elevator control cabinet; the measurement unit includes: a measurement unit; the system comprises an acceleration sensor, a first microprocessor and a first wireless communication module. The signal acquisition unit comprises: a signal processing unit; the system comprises a first microprocessor, a cardoor in-place switch, an elevator door lock loop detection circuit, a second microprocessor, an audible and visual alarm and a second wireless communication module. The car door in-place switch, theelevator door lock loop detection circuit, the audible and visual alarm and the second wireless communication module are all connected with the second microprocessor, the elevator door lock loop detection circuit is connected w