Vehicle tire detection device

A vehicle tire detection device, comprising a TPMS (Tire Pressure Monitoring System) sensor with a data transmission rate greater than 20 kbps;

• an antenna matching network and a terminal antenna, wherein the TPMS sensor is connected with the terminal antenna through the antenna matching network;
• wherein the terminal antenna is one of a valve stem, a metal base or a tire rim;
• wherein the antenna matching network comprises an inductor L1, an inductor L2, an inductor L3, and a capacitor C1 and a capacitor C2;
• a first end of the inductor L1 is connected with a tire pressure system integrated chip of the TPMS sensor, a second end of the inductor L1 is connected with a first end of the capacitor C2, a second end of the inductor L2, and a first end of the capacitor C1;
• a first end of the inductor L3 is connected with a second end of the capacitor C1 and the terminal antenna;
• a second end of the capacitor C2 is grounded, and a first end of the inductor L2 is connected with a positive electrode of a power supply;
• and
• the inductor L1 and the capacitor C2 are configured to form a first-order low-pass filter, and the capacitor C1 and inductor L3 are configured to form a high-pass filter network.