System for monitoring the tire

• US 20090045930A1
• Filed: 06/09/2006
• Published: 02/19/2009
• Est. Priority Date: 06/09/2005
• Status: Active Grant

• Current Assignee: Zhejiang Geely Holding Group Co., Ltd.
• Original Assignee: Zhejiang Geely Holding Group Co., Ltd.
• Inventors: Fu, Jianzhong
• Granted Patent: US 8,098,147 B2
• Time in Patent Office: Days
• US Class Current: 340/447
• 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 order and/or brake deceleration order, and afterward conveys the speech indicating order to the speech indicating unit, while the brake deceleration order to the brake deceleration mechanism; a speech indication unit, provided to receive said speech indication order and output the speech indication information; and a brake deceleration mechanism, provided to receive said brake deceleration order 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 the sampling data packet signals to said central controller;

said central controller wirelessly receives said tire condition sampling data packet signals, then processes said data packet signals by decoding and calculating so as to generate speech indicating order and/or brake deceleration order, and subsequently transmits the speech indicating order to the speech indicating unit, while the brake deceleration order to the brake deceleration mechanism;

said speech indicating unit, used to receive said speech indicating order and output speech indication information;

said brake deceleration mechanism, used to receive said brake deceleration order and perform 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 sampling data signals;

a signal processing unit, used to receive and process said sampling data signal and output data packet signals of tire conditions;

a radio-frequency transmission unit, used to transmit said data packet signals of tire conditions,

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 adopted radio-frequency is 315 MHz or 433 MHz or 866 MHz or other microwave bands licensed for civilian use.

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 tire condition data packet signals;

a signal processing control unit, used to process received tire condition packet signals by decoding and calculating so as to generate tire condition data which are then compared with range of preset tire condition threshold value. If said tire condition data fall into a preset threshold value range of tire conditions, the speech indicating order and/or brake deceleration order will be output.

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

tire burst or quick deflation data;

serious air shortage data;

normal pressure data;

overpressure data.

Said preset threshold value range of tire conditions indicates;

Range of tire burst or quick deflation<

30% of the normal pressure value of a tire;

30% of the normal pressure value of a tire<

range of serious air shortage<

60% of the normal pressure value of a tire;

60% of the normal pressure value of a tire<

range of air shortage<

80% of the normal pressure value of a tire;

80% of the normal pressure value of a tire<

range of normal pressure<

120% of the normal pressure value of a tire,

range of overpressure>

120% of the normal pressure of a tire;

If tire condition sampling data fall into the range of “

>

30% of the normal pressure value of a tire”

, only the speech indicating order will be output. After receiving said speech indicating order, the speech indicating unit outputs the corresponding speech indicating information at a preset indicating frequency;

If tire condition sampling data fall into the range of “

<

30% of the normal pressure value of a tire”

, speech indicating order and brake deceleration order will be output.

8. The system according to claim 6, characterized in that said signal processing control unit is provided with a following function that brake deceleration order performs following the sampling data signals of burst tire pressure, that is, the interruption of sampling data of tire burst or quick deflation will bring the interruption of brake deceleration order.

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 order transmitted from said central controller, and then generate speech alerting indication with the prerecorded and stored speech synthesis.