US-12617245-B2 - Vehicle tire detection device

Abstract

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.

Inventors

• Jianer Zhang
• Zenan Hu
• Mingguang Yu

Assignees

• HAMATON AUTOMOTIVE TECHNOLOGY CO., LTD

Dates

Publication Date

20260505

Application Date

20230731

Priority Date

20221008

Claims (9)

1. 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. 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. 3 . The vehicle tire detection device according to claim 2 , wherein the battery is paralleled with a supercapacitor C 3 .
4. 4 . The vehicle tire detection device according to claim 1 , wherein the TPMS sensor is externally mounted and located at the valve stem.
5. 5 . The vehicle tire detection device according to claim 4 , wherein the TPMS is directly connected with the terminal antenna.
6. 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. 7 . The vehicle tire detection device according to claim 4 , wherein the TPMS is connected with the terminal antenna through an extension rod.
8. 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. 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.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a national stage of international PCT Application No. PCT/CN2023/110313 filed on Jul. 31, 2023, and claims a priority to a Chinese Patent Application with the corresponding application number being 202211228513.9 and the application date being Oct. 8, 2022, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present application relates to the field of tire detection, and in particular to a vehicle tire detection device. BACKGROUND As countries are gradually implementing TPMS (Tire Pressure Monitoring System) standards, the demand for products is on the rise. The mainstream technology for TPMS sensors currently used by vehicle manufacturers is based on ASK (Amplitude Shift Keying) or FSK (Frequency Shift Keying) modulation methods, and the battery specifications typically involve 2032, 2050, or 2450 lithium-manganese batteries, with a capacity of 200 mAh or more to meet the product lifespan requirements. This is because the emission cycle and emission current occupied by traditional FSK or ASK modulation determine the emission power consumption, which prevents the selection of smaller batteries in traditional technology and necessitates the use of larger batteries to obtain a larger battery capacity to meet lifespan requirements of the product. Based on tests and research of similar TPMS sensors in the market, regardless of whether the technology is ASK or FSK modulation, the current TPMS radio frequency data transmission rate is within 20 kbps, where the transmission rate with the highest market share being 9.6 kbps or 10 kbps. Calculated at a rate of 9.6 kbps, assuming that a frame of data is 10 bytes, a data preamble is added, a total length of emitting a frame of data is approximately 8.5 ms, with an FSK emission power of 8 dbm, the conversion current is about 8-10 mA, which means that the continuous current consumption during the 8.5 ms time of emitting the frame of data is approximately 8˜10 mA. Therefore, reducing the emission current consumption by shortening the time to emit a frame of data, and thereby reducing the power consumption during emission, is a good direction for technical breakthrough. Due to the main vehicle-mounted electronic radio frequency in the market being 433.92 MHz, in environments with concentrated vehicles such as parking lots, there are multiple 433.92 MHz carrier radio frequency signals intermittently existed in spaces, i.e., the existence of same-frequency interference. This is not beneficial for the anti-interference capability of related technologies (long emission cycles). For example, during the emission of a frame of signal, if a carrier signal with the same frequency is emitted from another vehicle, the same-frequency collision can cause data disorder, CRC (Cyclic Redundancy Check) verification errors at the receiving end, leading to failed data emission. Thus, reducing the transmission cycle also helps to improve penetration of signals. SUMMARY The purpose of the present application is to provide a vehicle tire detection device that balances data emission efficiency and receiving sensitivity. The disclosure is achieved through the following technical measures: a vehicle tire detection device that includes a TPMS (Tire Pressure Monitoring System) sensor using ASK/OOK/FSK (Amplitude Shift Keying/On-Off Keying/Frequency Shift Keying) transmission technology with a data transmission rate greater than 20 kbps. Considering that the data transmission rate of related TPMS sensors is within 20 kbps, with long radio frequency frame emission cycles and high emission power consumption; by adopting a TPMS sensor with a data transmission rate greater than 20 kbps in the present application, the aim is to reduce the radio frequency emission time of the detection device, reduce the emission power consumption, enhance the signal transmission penetration, and improve radio frequency anti-interference capability. In some embodiments, the device further includes an antenna matching network and a terminal antenna, where the TPMS sensor is connected with the terminal antenna through the antenna matching network; the terminal antenna is one of a valve stem, a metal base or a tire rim. Since the TPMS sensor used in this structure has increased the data transmission rate, and the bandwidth occupied by the data increases, which may result in a certain decrease in sensitivity at the receiving end. In this structure, using a valve stem or tire rim as the terminal antenna enhances a length and area of the antenna, resulting in better signal conversion efficiency compared to the built-in antenna of the sensor, and better transmission stability of the sensor on the vehicle; furthermore, the terminal antenna is on the outside of the tire body, which is beneficial for increasing the strength of the wireless signal. With the same emission power of the TPMS sensor, it is easier to achieve wireless communicat