A vehicle includes a first detector configured to transmit and receive an ultrasonic signal to detect a presence or absence of an occupant inside the vehicle based on the ultrasonic signal; a second detector configured to detect an opening and closing state of a window including at least one of an upper window or a side window provided in the vehicle; and a controller configured to compare an intensity of the ultrasonic signal received by the first detector and a preset level to determine the presence of the occupant. The controller may be configured to change the preset level based on the opening and closing state detected by the second detector.

A vehicle theft-prevention apparatus can include a body, a computing device, sensors, and a speaker. The body can include a first and second portion and a light emitting portion. The first portion can move relative to the second portion. The second portion can include perforations to facilitate sound transmission from the speaker. The light emitting portion can be positioned between the first portion and the second portion. The light emitting portion can be configured to emit light based on a signal from the computing device. A lens can include a concentric structure protruding from the body. The lens can cover the sensor.

A vehicle theft-prevention apparatus can include a locking mechanism configured to engage to secure the vehicle theft-prevention apparatus into a vehicle and disengage to unsecure the vehicle theft-prevention apparatus from the vehicle. The vehicle theft-prevention apparatus can include a clutch mechanism configured to prevent the locking mechanism from further engaging based on a magnitude of force applied. The clutch mechanism can include a first portion configured to rotate about an axis and comprising at least one aperture, a second portion configured to rotate about the axis and comprising a track, and at least one article configured to pass through the at least one aperture and travel along the track.

A vehicle theft-prevention apparatus can a motor unit configured to rotate based on an electrical signal. A shaft of the motor unit can be coupled to a cam. The cam can move a connection plate between an engaged position and a disengaged position. When the connection plate is in the engaged position, a locking mechanism can move between a locked position and an unlocked position. When the connection plate is in the disengaged position, the locking mechanism can maintain a current position.

A vehicle theft-prevention apparatus can include a slip clutch mechanism, a locking mechanism, and a cylindrical body including a first portion and a second portion. The first portion can be configured to rotate about the second portion. The locking mechanism can be configured to engage based on rotation of the first portion relative to the second portion in a first direction, and disengage based on a rotation of the first portion relative to the second portion in a second direction. The slip clutch mechanism can be configured to prevent the locking mechanism from further engaging from rotation in the first direction relative to the second portion based on a magnitude of force applied.

A vehicle theft-prevention apparatus can include a slip clutch mechanism, a locking mechanism, and a cylindrical body including a first portion and a second portion. The first portion can be configured to rotate about the second portion. The locking mechanism can be configured to engage based on rotation of the first portion relative to the second portion in a first direction, and disengage based on a rotation of the first portion relative to the second portion in a second direction. The slip clutch mechanism can be configured to prevent the locking mechanism from further engaging from rotation in the first direction relative to the second portion based on a magnitude of force applied.

A vehicle theft-prevention apparatus can include a wireless transceiver, a plurality of sensors configured to sense measurements proximate to a vehicle, and at least one computing device coupled to the plurality of sensors and the wireless transceiver. The at least one computing device can be configured to read a plurality of measurements of the plurality of sensors and determine that at least one event has occurred based on the plurality of measurements. The at least one computing device can store data corresponding to the at least one event on a local storage coupled to the at least one computing device and can transmit, via the wireless transceiver, the data corresponding to the at least one event to a remote service.

A vehicle includes a first detector configured to transmit and receive an ultrasonic signal to detect a presence or absence of an occupant inside the vehicle based on the ultrasonic signal; a second detector configured to detect an opening and closing state of a window including at least one of an upper window or a side window provided in the vehicle; and a controller configured to compare an intensity of the ultrasonic signal received by the first detector and a preset level to determine the presence of the occupant. The controller may be configured to change the preset level based on the opening and closing state detected by the second detector.

A system, apparatus and method for secure vehicle sharing comprising a computerized client device in the form of a mountable vehicle license plate frame (SLPF) 117 enabled for wireless communication and connection to a wide area network 101 including a server 103. The SLPF 117 device has a processor with an instance of the software 105 executing from memory thereon, Global Positioning System (GPS) capability, power source, and a locking key compartment. The SLPF 117 device may be easily mounted, after market, to the vehicles of registered vehicle owners 107. The server may track time of use, vehicle mileage and vehicle location while the vehicle renter is operating the vehicle. Upon completion of vehicle use, the renter replaces the key or other item in the locking compartment, sends notification of completion of use to the server which then completes a financial transaction between the renter and owner.

A vehicle theft-prevention system can include a mobile application that can determine a location of the mobile device. One or more computing devices can be in communication with the mobile application via a network. The mobile application and the at least one computing device configured to determine that the location of the mobile device has moved outside of a geofence associated with a vehicle theft-prevention apparatus. The mobile application and the at least one computing device can cause the vehicle theft-prevention apparatus to change from an unarmed mode to an armed mode.