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Wireless vehicle monitoring system
| Details |
Inventors: Zhou, Joe Huayue;
Assignee:
Primary Examiner: Trieu; Van
Assistant Examiner:
Attorney, Agent or Firm:
A wireless vehicle safety monitoring system, including a portable monitor unit and a plurality of sensor modules that can monitor vehicle tire pressure, detect presence of object and its distance behind the vehicle, and monitor the security of the vehicle. The sensor modules communicate by encoded RF wireless transmission with the monitor unit, which will display the individual tire pressure on it's LCD panel while the vehicle is moving, and also display any detected object range information during the vehicle reverse motion. When one or more monitoring situations arise (bad tire pressure, object detection, or vehicle security violation), the monitor unit will issue warnings to alert the vehicle owner. The wireless pressure sensor module is miniaturized for easy mounting on the tire valve stem with minimal obstruction. The wireless ultrasonic object detection sensor module is mounted on the rear license plate holder. The small monitor unit can be dashboard-mounted or placed on any viewable location in the vehicle, or carried by the user. The system's unique power-conservation technology enables the monitor unit to operate on a single 1.5V AA battery for over six months, and for the sensor modules to operate close to 18 months without needing to change batteries. |
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DETAILED DESCRIPTION A main object of the present invention is to provide a wireless vehicular safety monitoring system, which can monitor tire pressure, detect objects behind the vehicle, and remotely notify vehicle security violations.
Another object of the invention is to provide a small battery-operated monitor unit, which can display individual tire pressure and detected-object range, and which can be carried by the vehicle owner for learning about car alarm activation from as far as 1000 feet away.
Another object of the invention is to provide a power-conservation method and apparatus, which allow the monitor unit to use minimal power when the vehicle is turned off.
When a car is operating, its battery voltage is higher than when the engine is turned off.
This system used a battery-voltage sensor module to detect the vehicle engine on/off status, and then transmit the status via RF signal to the monitor unit.
Therefore, in engine-off time, the monitor unit can go to sleep and only wake up 10 milliseconds for every 2 seconds to detect any new engine-on message or alarm trigger message.
This power-saving method enables the monitor unit to operate on a single 1.
5V AA size battery for over six months.
Another object of the invention is to provide another power-conservation method and apparatus, which allow the tire pressure sensor module to stop consuming power when the vehicle is stationary.
The tire pressure sensor module used omni-directional mercury roll motion switch for controlling its battery power supply, which will be turned on only while the vehicle is moving.
This power-saving method enables the sensor module to operate on one set of button battery for over 18 months.
Another object of the invention is a method for constructing miniature sensor modules by first laying out print circuit and mounting components on a flexible rectangular sheet.
Then the circuit sheet is vertically mounted on the base print circuit board for circularly surrounding the protruding pressure sensor, so that optimal utilization of space inside the module housing can be realized
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