Vehicle tire detection device
The present application discloses a vehicle tire detection device, including a TPMS (Tire Pressure Monitoring System) sensor, an antenna matching network, and a terminal antenna. The TPMS sensor uses ASK/OOK/FSK transmission technology with a data transmission rate greater than 20 kbps. The TPMS sensor is connected to the terminal antenna through the antenna matching network. The terminal antenna is one of a valve stem, a metal base, or a tire rim.
1 . 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 L 1 , an inductor L 2 , an inductor L 3 , and a capacitor C 1 and a capacitor C 2 ; a first end of the inductor L 1 is connected with a tire pressure system integrated chip of the TPMS sensor, a second end of the inductor L 1 is connected with a first end of the capacitor C 2 , a second end of the inductor L 2 , and a first end of the capacitor C 1 ; a first end of the inductor L 3 is connected with a second end of the capacitor C 1 and the terminal antenna; a second end of the capacitor C 2 is grounded, and a first end of the inductor L 2 is connected with a positive electrode of a power supply; and
the inductor L 1 and the capacitor C 2 are configured to form a first-order low-pass filter, and the capacitor C 1 and inductor L 3 are configured to form a high-pass filter network.
2 . The vehicle tire detection device according to claim 1 , wherein a battery of the TPMS sensor uses a button cell with a diameter of 16 mm and a thickness of 3.2 mm.
3 . The vehicle tire detection device according to claim 2 , wherein the battery is paralleled with a supercapacitor C 3 .
4 . The vehicle tire detection device according to claim 1 , wherein the TPMS sensor is externally mounted and located at the valve stem.
5 . The vehicle tire detection device according to claim 4 , wherein the TPMS is directly connected with the terminal antenna.
6 . The vehicle tire detection device according to claim 1 , wherein when the TPMS sensor uses NTM88 chip series, the data transmission rate of the TPMS sensor is greater than or equal to 38.4 kbps.
7 . The vehicle tire detection device according to claim 4 , wherein the TPMS is connected with the terminal antenna through an extension rod.
8 . The vehicle tire detection device according to claim 1 , wherein an inductance value range of the inductor L 3 ranges from 8.2 nH to 68 nH.
9 . The vehicle tire detection device according to claim 3 , wherein a capacity of the supercapacitor C 3 ranges from 10 uF to 100 uF.