The components of the alarm system are fully enclosed within a portable housing and require no external power or data signal connections. A mobile transmitter generates a proximity signal indicating a given range from the vehicle. An audible alarm signal and a GPS location signal are generated in response to the output of one or more sensors indicating a particular occurrence, if a transmitter is outside of the given range, indicating that the driver has left the vehicle unattended and vulnerable to attack. When the vehicle is driven by an authorized driver having the transmitter, the received proximity signal indicates that the driver is within the given range, preventing the generation of the audible alarm resulting from sensors being triggered by shifting cargo in the cargo compartment resulting from vehicle movement and irregular road surface conditions during transit.

The components of the alarm system are fully enclosed within a portable housing and require no external power or data signal connections. An audible alarm signal is generated in response to the output to one or more sensors indicating a particular occurrence, if a proximity signal from a mobile transmitter located within a given range of the vehicle is not received, indicating that the driver has left the vehicle unattended and vulnerable to attack. When the vehicle is being driven by an authorized driver having the transmitter, the received proximity signal prevents the generation of the audible alarm resulting from sensor being triggered by vehicle movement during transit including irregular road surface conditions. A GPS unit transmits a signal indicating the state of the alarm and the location of the housing in response to the alarm signal.

Display units with vandalism deterrence are disclosed, along with related systems and methods. A display unit includes electronic display(s), shock sensor(s), and a controller which receives data from the shock sensor(s). Where the controller determines that the data received from the shock sensor(s) is outside of one or more predetermined parameters, the controller initiates a vandalism deterrence protocol for the display unit.

Display units with vandalism deterrence are disclosed, along with related systems and methods. A display unit includes electronic display(s), shock sensor(s), and a controller which receives data from the shock sensor(s). Where the controller determines that the data received from the shock sensor(s) is outside of one or more predetermined parameters, the controller initiates a vandalism detected signal, which may electronically and automatically cause changes to ongoing operations of some or all of the one or more electronic displays.

A smart alarm module equipped for a vehicle includes a microcontroller adapted to arm the smart alarm module in response to a remote controller, a tilt sensor coupled to the microcontroller, where the tilt sensor is applied to the vehicle to sense change of angle values of the vehicle, the tilt sensor is activated to trigger an alarm when the change of angle values exceeds a predetermined value. The tilt sensor includes a register A and a register B to respectively store initial angle values produced from the tilt sensor. A calculation of |A(n)B(n+1)| is performed to check whether the tilt sensor is triggered, if positive, sends out the alarm; otherwise, stores the updated angle data of the register B in the register A. A(n) represents angle value stored in the register A at previous time, and B(n+1) represents currently updated angle value stored in the register B.