DETERMINING THE STATE OF A GARAGE DOOR USING VEHICLE SENSORS
A garage door can be detected as being open by sensing various physical conditions the existence of which indicate the garage door as being open. When a door is determined to be open, a notification message is wirelessly transmitted to a predetermined entity or person notifying them that the door is open. Corrective action can then be taken to close the door to keep the vehicle and contents of the garage secure.
1 . A garage door position detector comprising:
a location determiner, configured to determine whether a vehicle is in a garage;
a vehicle-located sensor coupled to the location determiner and configured to detect a physical condition that indicates an open position of a garage door and to generate a signal representative of the garage door being open;
a wireless transmitter coupled to the vehicle-located sensor and configured to wirelessly transmit a message indicating the position of a garage door responsive to the signal from the sensor.
2 . The garage door position detector of claim 1 , wherein the wireless transmitter is a radio frequency transmitter.
3 . The garage door position detector of claim 2 , wherein the wireless transmitter is configured to transmit a predetermined data message.
4 . The garage door position detector of claim 3 , wherein the predetermined data message is an open garage door alarm message transmitted to a predetermined address.
5 . The garage door position detector of claim 1 , wherein the vehicle-located sensor is a camera.
6 . The garage door position detector of claim 1 , wherein the vehicle-located sensor is an ultrasonic transducer.
7 . The garage door position detector of claim 1 , wherein the vehicle-located sensor is a microphone.
8 . The garage door position detector of claim 1 , wherein the vehicle-located sensor is configured to detect an ambient light level.
9 . The garage door position detector of claim 1 , wherein the vehicle-located sensor is a laser detector.
10 . The garage door position detector of claim 1 , wherein the vehicle-located sensor is an RFID tag.
11 . The garage door position detector of claim 1 , wherein the wireless transmitter is a radio frequency transmitter and configured to transmit a door close message to a garage door opener, after a predetermined time has elapsed.
12 . A garage door position-sensing vehicle comprising:
a processor;
a non-transitory memory device coupled to the processor and configured to store program instructions for the processor;
a location determiner, coupled to the processor and configured to determine whether a vehicle is in a garage;
a sensor coupled to the processor and configured to generate an electrical signal representative of the garage door being open; and
a wireless transmitter coupled to the processor and configured to transmit an information-bearing message indicating the position of a garage door responsive to the signal from the sensor.
13 . The garage door position-sensing vehicle of claim 12 , wherein the wireless transmitter is a radio frequency transmitter.
14 . The garage door position-sensing vehicle of claim 13 , wherein the program instructions are configured to cause the radio frequency transmitter to transmit a garage door open warning message, responsive to the processor's receipt of a signal from sensor representative of the garage door being open.
15 . A method of detecting a garage door being open, the method comprising:
detecting whether a vehicle is in a garage having a garage door;
detecting a physical condition that indicates an open position of a garage door;
generating an information-bearing signal representative of the garage door being open; and
wirelessly transmitting a message, indicating that the garage door is open, responsive to the information bearing signal received from the sensor.
16 . The method of claim 15 , wherein detecting a physical condition comprises:
capturing a first image of the garage door closed;
capturing a second image after the first image has been captured;
comparing the first image to the second image and determining differences between them; and
determining the garage door to be open or closed based on the result of the comparing step.
17 . The method of claim 15 , wherein detecting a physical condition comprises:
measuring a distance between a first end of a vehicle and an object;
determining the garage door to be open if the measured distance exceeds a predetermined threshold distance.
18 . The method of claim 15 , wherein detecting a physical condition comprises:
measuring and recording a first ambient light level with the garage door closed;
measuring and recording a second ambient light level with the garage door open;
subsequently determining whether the garage door is open or closed by comparing the first and second ambient light levels to subsequently measured ambient light levels.
19 . The method of claim 15 , wherein detecting a physical condition comprises:
measuring and recording a first ambient noise level with the garage door closed;
measuring and recording a second ambient noise level with the garage door open;
subsequently determining whether the garage door is open or closed by comparing the first and second ambient noise levels to subsequently measured ambient noise levels.
20 . The method of claim 15 , wherein the garage door comprises an RFID tag and wherein detecting a physical condition comprises:
measuring and recording a first RFID tag signal strength level, obtained from an RFID tag sensor when the garage door is closed;
measuring and recording a second RFID tag signal strength level, obtained from the RFID tag sensor when the garage door is open; and
subsequently determining whether the garage door is open or closed by comparing a subsequently determined RFID tag signal strength to the first and second RFID tag signal strength levels.