The receiving module of the TPMS system is mainly composed of an antenna, a radio frequency receiving circuit, a main control chip MCU, a keyboard, and a display. It is used to receive tire temperature and pressure data transmitted by each transmitting module, display the ID identification code and measurement data of each tire, and Sound and light alarm when abnormal conditions occur. Because the receiving module is installed in the car compartment, the requirements for various aspects of device selection are not high, and industrial grade is sufficient.
The RF receiving chip requires a high receiving sensitivity, and Maxim's MAXl473 chip is used here. MAXl473 is a fully integrated, low-power, CMOS superheterodyne receiver with an input signal range of 114-O dBm, image carrier suppression above 50 dB, used to receive amplitudes in the 300-450 MHz frequency range Keyed (ASK) data signals are ideal. This chip consumes less than 2.5μA in shutdown mode and 5.2 mA in receive mode, and can receive data rates up to 100 kbps. The 315 MHz RF receiving circuit implemented using MAXl473 chip is shown in the figure.
60V20Ah Lithium Ion Battery,Waterproof Battery Pack For Bicycle,60V 20Ah L-Ion Waterproof Battery,Rechargeable 60V Lifepo4 Lithium Battery
Jiangsu Zhitai New Energy Technology Co.,Ltd , https://www.zttall.com