Most of the daily life of urban residents will be dependent on the basis of a number of public facilities, such as garbage collection, schools and public transportation, and so on. These services provide the basis of the relevant government departments and companies must invest enough vehicles. If the school bus driver in the morning, there have been found in the vehicle tire leak, then it is likely that he will not be able to start on time delivery of the day-to-day work. For refuse collection and parcel couriers, the same situation there.
Five years ago, Michelin North America opened a branch system, through the system, the car automatically detects the tire air pressure. This eTire air pressure and asset monitoring system used passive RFID tags and labels associated with the pressure and temperature sensors. These sensors installed in the tire wall, can be installed in a garage near the entry, on the ground near the antenna to read, but also by the maintenance staff hand-held reader for reading.
eTire II system is characterized by: RFID tags of light equivalent to the size of shirt buttons, the sensor module in the vehicle at high speed and stable operation when there is no cause for tire imbalance.
Maintain air pressure in the wheel of a suitable vehicle to ensure not only the extent of the normal traffic, but also to save fuel, because inflatable wheel is low, vehicles consume more fuel.
ETire the first system in 2002, provided by TI, the system including the use of TI's proprietary air interface protocol passive, low-frequency RFID tags. Label itself has been integrated into the capacitive MEMS (Micro Electro-Mechanical Systems, MEMS), as a means of pressure and temperature sensors. This relatively bulky labels, the size of a credit equivalent to 5-6 Zhang stacked together. As the labels are pasted on the wall in the tires, Michelin is therefore recommended the vehicle speed is less than 50 meters in the United Kingdom / hour. When driving over the speed limit, the sensor module might not function properly, its weight can also lead to uneven tire rotation.
Michelin is now using a second-generation eTire system eTire II, the label Dimension only equivalent to the size of shirt buttons, sensing module in the high-speed vehicle operation will not be under any tire imbalance. Second-generation eTire sensing module integrates temperature and pressure sensors, but also an ultra-high frequency, in line with ISO 18000-6b standard RFID inlays.
Like the first generation of sensing module, the second generation of sensing modules are attached to the tires on the wall. Once the device was powerful paste agent attached to the tire, it can not be removed or re-used for another tire on. In addition to the pressure on the track, the track temperature is also very important. Through the removal of the pressure caused by cold air to reduce the volume of traffic management can be more accurate pressure data, tire more quickly identify the minor cracks.
Other tire pressure monitoring system is usually applied to the edge of the tire, but it will lead to the edge of the tire overheating and affect the accuracy of the reading.
ETire the use of modules also own vehicles equipped with a UHF tags, placed in the rear bumper of the vehicle, the vehicle identification as a logo. The sensor module ID, ID tags and trucks, corresponding to each other. Each ID label tires, tires with the corresponding position, Ruzuo front wheel and so on.
Every day, read by the reader module eTire data, and data transfer to a running software on the Internet BibTrack. With this software, managers can be the vehicle for a number of vehicles parking and terminal monitor the leakage often find the tires.
The new sensor module price has not been determined, is the first generation module sales price is $ 25 each.
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