Sensor device and method for monitoring an occupancy state of a parking space of a parking facility, and parking facility

A sensor device, comprising:

• a parking space sensor, wherein an occupancy state of a parking space of a parking facility for motor vehicles is montirable by the parking space sensor;
• a first electrical energy store;
• a first electric circuit via which the parking space sensor and the first electrical energy store are connected and via which the parking space sensor is suppliable with electrical energy from the first electrical energy store;
• a detection device;
• and
• a second electric circuit via which a communication interface is suppliable with electrical energy from a second electrical energy store;
• wherein the sensor device is configured for responding to a detection by the detection device of an interruption of the first electric circuit by transmitting via the communication interface and over a communication network a signal indicating the interruption.

A method for monitoring an occupancy state of a parking space of a parking facility for motor vehicles by using the sensor device, the method comprising:

• monitoring, by a parking space sensor that is supplied with electrical energy from a first electrical energy store, an occupancy state of a parking space of a parking space of a parking facility for motor vehicles;
• a detection device detecting an interruption in a first electric circuit that connects the parking space sensor to the first electrical energy store;
• and
• responsive to the detection, transmitting via a communication interface and over a communication network a signal indicating the interruption, wherein the communication interface is supplied with electrical energy from a second energy store.

A parking facility for motor vehicles, the parking facility comprising:

• at least one parking space;
• and
• for each of one or more of the at least one parking space, a respective sensor device that includes:
• a parking space sensor by which an occupancy state of the respective parking space is detectable;
• a first electrical energy store;
• a first electric circuit via which the parking space sensor and the first electrical energy store are connected and via which the parking space sensor is suppliable with electrical energy from the first electrical energy store;
• a detection device;
• and
• a second electric circuit via which a communication interface is suppliable with electrical energy from a second electrical energy store;
• wherein the sensor device is configured for responding to a detection by the detection device of an interruption of the first electric circuit by transmitting via the communication interface and over a communication network a signal indicating the interruption.