System for monitoring the tire

• US 8,098,147 B2
• Filed: 06/09/2006
• Issued: 01/17/2012
• Est. Priority Date: 06/09/2005
• Status: Active Grant

• Current Assignee: Zhejiang Geely Holding Group Co., Ltd. (Shu Fu Li)
• Original Assignee: Zhejiang Geely Holding Group Co., Ltd. (Shu Fu Li)
• Inventors: Fu, Jianzhong
• Primary Examiner(s): Mullen, Thomas J
• Application Number:
  US11/919,590
• Publication Number:
  US 20090045930A1
• Time in Patent Office: 2,048 Days
• Field of Search: 340442-447
• US Class Current: 340/445
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60T 17/18 Safety devices; Monitoring

Abstract

This invention provides a tire monitoring system, comprising a remote tire monitoring unit installed in the tire, a central controller, a speech indicating unit and a brake deceleration mechanism; wherein the remote tire monitoring unit is used to monitor and sample the pressure and temperature within the tire, and generate the sampling data signals of tire conditions which are subsequently wirelessly transmitted to the central controller; the central controller wirelessly receives sampling data signals of tire conditions, and calculates received data signals so as to generate speech indicating command and/or brake deceleration command, and afterward conveys the speech indicating command to the speech indicating unit, while the brake deceleration command to the brake deceleration mechanism; a speech indication unit, provided to receive said speech indication command and output the speech indication information; and a brake deceleration mechanism, provided to receive said brake deceleration command and performs action of brake deceleration so as to provide effective security protection when quick deflation and tire burst suddenly occur in a short time.

Claims

1. A tire monitoring system comprises:

a remote tire monitoring unit provided within a tire;

a central controller;

a speech indicating unit; and

a brake deceleration mechanism;

wherein, said remote tire monitoring unit monitors and samples tire pressure at a sampling frequency of 5 Hz˜

20 Hz, and wirelessly transmits tire condition signals to said central controller;

said central controller wirelessly receives said tire condition signals, then processes said tire condition signals so as to generate a speech indicating command and/or a brake deceleration command, and subsequently transmits the speech indicating command to the speech indicating unit, and the brake deceleration command to the brake deceleration mechanism;

said speech indicating unit receives said speech indicating command and outputs speech indication information; and

said brake deceleration mechanism receives said brake deceleration command and performs a brake deceleration action.

2. The system according to claim 1, characterized in that said remote tire monitoring unit comprises:

a sensor used to monitor and sample tire conditions and output said tire condition signals;

a signal processing unit used to receive and process said tire condition signals and output packets of said tire condition signals;

a radio-frequency transmission unit used to transmit said packets of tire condition signals;

a timing wakeup circuit unit used to keep dormant the sensor, said signal processing unit and said radio-frequency unit during sampling intervals so as to reduce battery energy consumed by the remote tire monitoring unit.

3. The system according to claim 2, characterized in that the wakeup interval of said timing wakeup circuit unit is 50˜

200 ms.

4. The system according to claim 2, characterized in that the radio-frequency transmission unit transmits at a frequency of 315 MHz or 433 MHz or 866 MHz.

5. The system according to claim 2, characterized in that said sensor comprises a pressure sensor and/or a temperature sensor.

6. The system according to claim 1, characterized in that said central controller comprises:

a radio-frequency unit, used to receive said tire condition signals;

a signal processing control unit, used to process received tire condition signals to generate tire condition data values which are then compared with a range of preset tire condition threshold values, wherein if said tire condition data value is in said range of preset tire condition threshold values, the speech indicating command and/or brake deceleration command is transmitted by the signal processing control unit.

7. The system according to claim 6, characterized in that said tire condition signals comprise:

tire burst data;

air shortage data;

normal pressure data; and

overpressure data;

wherein said range of preset tire condition threshold values comprises;

a range of values indicating tire burst that is;

less than or equal to 30% of the normal pressure value of the tire;

a range of values indicating air shortage that is;

greater than 30% of the normal pressure value of the tire; and

less than 80% of the normal pressure value of the tire;

a range of values indicating normal pressure that is;

greater than 80% of the normal pressure value of the tire; and

less than 120% of the normal pressure value of the tire;

a range of values indicating overpressure that is;

greater than 120% of the normal pressure of the tire;

wherein

if the tire condition data values are in the range of >

30% of the normal pressure value of the tire, only the speech indicating command will be generated;

wherein after receiving said speech indicating command, the speech indicating unit outputs said speech indication information at a preset indicating frequency;

wherein if tire condition data values are in the range of <

30% of the normal pressure value of the tire, both a speech indicating command and a brake deceleration command will be generated.

8. The system according to claim 7, characterized in that if said signal processing control unit is provided with a tire condition data value that is greater than said range of values indicating tire burst, said signal processing control unit interrupts any previous brake deceleration commands.

9. The system according to claim 1, characterized in that said speech indicating unit comprises a speech synthesis circuit provided to receive the speech indicating command transmitted from said central controller, and then generate speech indication information with prerecorded and stored speech synthesis.