Automobile tire monitoring system and tire identification method
An automobile tire pressure monitoring system and tire identification method that includes a transmitting and detecting unit provided on each tire, as well as a receiving and display unit that includes a receiving unit, a main control unit and a display unit. A plug-in encoding memory is plugged into the receiving and display unit. One fixed ID code, which is the same as that for the encoding memory, is provided for each transmitting and detecting unit. When the power is on, the receiving and display unit reads the ID code in each plug-in encoding memory plugged into the socket of the display unit, and saves the information on the corresponding relationships between ID codes saved in memories and the tire identity. After receiving the signal from the transmission unit, the receiving and display unit reads the ID codes in it, and determines whether these codes are identical with those in the memories. If the signal is valid, the receiving and display unit compares the corresponding relationships, determines on which tire the detection unit is transmitting the signal, and displays the information about pressure and temperature in corresponding display areas.
1. An automobile tire monitoring method which comprises the following steps:
a) providing the automobile tire pressure monitoring system comprising: a plurality of transmitting and detecting units each separately provided on a different tire of a vehicle and a receiving and display unit; each transmitting and detecting unit including a sensor, a controlling and transmitting circuit and a transmitting antenna; and the receiving and display unit includes a receiving unit, a main control unit and a display unit, the receiving and display unit also comprises several plug-in code memories, each of the plug-in code memories has a fixed ID code, each transmitting and detecting unit has a fixed ID code which corresponds to the ID code fixed in one of said several plug-in memories:
b) starting and initializing the system;
c) reading in ID codes from the plug-in code memories; d) establishing and saving a corresponding relationship between the read in ID codes and tire identification;
e) receiving data from at least one of the transmitting and detecting units;
e) determining whether an ID code in received data corresponds to one of the read in ID codes;
f) if the ID code in the received date does not match one of the read in ID codes discard the received data and wait to receive more data from at least one of the transmitting and detecting units;
g) if the ID code in the received date does matches one of the read in ID codes, display information in the received data; and
h) continue monitoring tire pressure by repeating steps e) through h).
2. The monitoring method according to claim 1 , further comprising providing an alarm circuit and activating an alarm when sensed tire pressure is outside of a predetermined range.
3. The monitoring method according to claim 1 , wherein the data transmitted by the transmitting and detecting units is acquired by the sensors and magnified and converted by an A/D converter and encoded together with fixed ID code in the respective transmitting and detecting unit and then transmitted via an antenna after modulating and magnifying the transmission signal.