CN102189979A - System and method for integrating tire pressure monitoring and remote key-free access - Google Patents

Abstract

A system and a method for integrating tire pressure monitoring and remote keyless entry are applied to a vehicle and a vehicle key remote controller, and the vehicle key remote controller transmits a signal with a preset carrier frequency. When the vehicle is in a locked state, an integrated controller in the vehicle detects an unlocking signal from a vehicle key remote controller; if the identity authentication code from the unlocking signal of the vehicle key remote controller is confirmed, the tire information request signal is transmitted to the tire pressure sensing module. The tire pressure sensing module sends the tire information signal at least containing the tire pressure data within a preset time limit, and the tire information signal is transmitted by the preset carrier frequency, thereby achieving the advantages of hardware sharing and meeting the safety specification.

Description

System and method for integrating tire pressure monitoring and remote keyless entry

technical field

The invention relates to a method for monitoring tire pressure, in particular to a method for integrating tire pressure monitoring and keyless entry.

Background technique

When the tire pressure (hereinafter referred to as tire pressure) is abnormal, it will not only reduce the life of the tire and increase the fuel consumption of the vehicle, but also affect the braking performance of the vehicle or increase the chance of a flat tire. Therefore, in order to ensure driving safety, the Tire Pressure Monitoring System (TPMS) is gradually being applied to effectively inform the user of the tire pressure. A general tire pressure monitoring system includes a tire pressure sensing unit and a radio frequency transceiver (collectively referred to as a tire pressure sensing module) installed on the tire, as well as a radio frequency transceiver and a display placed in the car. After the tire pressure sensing unit measures the tire pressure data, the tire pressure data is transmitted to the wireless receiver placed in the car through the wireless (such as radio frequency) transceiver at the tire part, and the measured tire pressure is displayed on the vehicle display data.

Keyless Entry System (Keyless Entry System) is currently widely used in cars to replace traditional physical keys. The keyless entry system can be divided into two forms: Remote Keyless Entry (RKE for short) and Passive Keyless Entry (PKE for short). The RKE system requires the user to press the button on the remote control of the RKE car key to unlock the car. The PKE system does not require the user to press the button of the PKE car key remote control. As long as the PKE car key remote control is close to the vehicle, the door will automatically unlock. In the above two keyless entry systems, the car key remote controller has a wireless transmitter, and a corresponding wireless receiver is also installed in the car.

The tire pressure monitoring system and the keyless entry system mentioned above are independent operating systems in the prior art, and do not interact with each other or share parts. That is to say, there must be a set of wireless receiver and related components in the car for the tire pressure monitoring system, and another set of wireless receiver and related components for the keyless entry system. However, the tire pressure monitoring system and the RKE keyless entry system use the same frequency for data transmission. Therefore, using separate wireless transceivers and related components will result in duplication of hardware and waste of cost.

Furthermore, the tire pressure sensing module of the general tire pressure sensing system is located in the tire, so most of them are powered by the battery. The tire information signal transmission cycle of the tire pressure sensing module, that is, two tires The interval between information signal transmissions should not be too short to avoid power loss, so the user generally cannot know the tire pressure data immediately. However, in order to provide higher safety standards, it is preferable that the tire pressure sensing module can provide tire pressure data immediately when the user needs to use the car, so as to improve the safety effect.

Contents of the invention

An object of the present invention is to provide a system and method for integrating tire pressure monitoring and remote keyless entry that can provide tire pressure data in real time.

Another object of the present invention is to provide a system and method for integrating tire pressure monitoring and remote keyless entry, which can take into account both real-time tire pressure data and power saving.

To achieve the above objectives of the present invention, the present invention provides an integrated tire pressure monitoring and remote keyless system comprising an integrated controller and at least one tire pressure sensing module. The integrated controller is located in the vehicle and includes a central control unit and a central wireless transceiver unit. The tire pressure sensing module is located in the vehicle tire and includes a tire pressure processing unit, a tire pressure wireless transceiver unit and a tire pressure sensing unit, wherein the tire pressure processing unit is electrically connected to the tire pressure wireless transceiver unit and the tire pressure sensing unit, and the tire wireless transceiver unit operates with the signal of the predetermined carrier frequency. The integrated controller sends a tire information request signal to the tire pressure sensing module after receiving the unlocking signal from the car key remote control and confirming the identity authentication code of the unlocking signal, and the tire pressure sensing module A tire information signal including at least tire pressure data is sent within a predetermined period.

In order to achieve the above-mentioned purpose of the present invention, the present invention also provides a method for integrating tire pressure monitoring and remote keyless system including:

(a) When the vehicle is locked, detect the unlocking signal from the remote control of the vehicle key;

(b) If the identity authentication code from the unlocking signal of the remote control of the car key is confirmed, the tire information request signal is sent to the tire pressure sensing module; and

(c) The tire pressure sensing module sends a tire information signal within a predetermined period, the tire information signal is transmitted at the predetermined carrier frequency and at least includes tire pressure data.

By virtue of the above-mentioned system and method, the present invention only needs one radio frequency transceiver unit in the car to correspond to the tire pressure monitoring system and the keyless entry system, thus greatly saving the manufacturing cost. The tire pressure sensing module will transmit tire pressure data within a certain period of time (for example, within 6 seconds) after unlocking to meet higher safety requirements.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

FIG. 1 is a schematic diagram illustrating the application of the integrated tire pressure monitoring and vehicle remote unlocking system of the present invention;

2 is a block diagram illustrating the integrated tire pressure monitoring and vehicle remote unlocking system of the present invention;

FIG. 3 is a flowchart illustrating the operation of the integrated tire pressure monitoring and vehicle remote unlocking system of the present invention;

FIG. 4 is a diagram illustrating a cycle of transmitting tire information signals.

Among them, reference signs

10 integrated controller

100 central control unit 110 central wireless transceiver unit

110a central wireless receiving unit 110b central wireless transmitting unit

120 antenna

20 tire pressure sensing module

200 tire pressure processing unit 210 tire pressure wireless transceiver unit

210a tire pressure wireless receiving unit 210b tire pressure wireless transmitting unit

220 tire pressure sensing unit 230 power supply

30 car key remote control

300 remote control control unit 310 remote wireless transmitter unit

Steps S100-S140

Detailed ways

Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

Please refer to FIG. 1 , which is a schematic view illustrating the application of the integrated tire pressure monitoring and vehicle remote unlocking system of the present invention. The integrated tire pressure monitoring and vehicle remote unlocking system of the present invention is applied to a vehicle, and includes an integrated controller 10 and at least one tire pressure sensing module 20 (4 in the figure) located in the vehicle. The vehicle has a matching car key remote controller 30 , and the integrated controller 10 , tire pressure sensing module 20 and car key remote controller 30 can communicate with each other in a wireless manner. In more detail, the integrated controller 10, the tire pressure sensing module 20 and the car key remote controller 30 communicate with each other by a wireless signal of a predetermined high-frequency carrier frequency. The high-frequency carrier frequency can be, for example, 433.92 MHz or 315MHz, but other ranges of frequencies are also possible.

Please refer to FIG. 2 , which is a block diagram illustrating the integrated tire pressure monitoring and vehicle remote unlocking system of the present invention. The integrated controller 10 includes a central control unit 100, a central wireless receiving unit 110a, a central wireless transmitting unit 110b and an antenna 120; 100 are electrically connected and can be integrated into a central wireless transceiver unit 110 . The central wireless transceiver unit 110 can receive the unlock/lock command signal from the car key remote controller 30 through the antenna 120 , and achieve two-way communication with the tire pressure sensing module 20 through wireless signals. The central control unit 100 can interpret the unlock/lock command signal from the car key remote controller 30 and send out the command signal to control the tire pressure sensing module 20 after programming. The car key remote control 30 has a remote control unit 300 , a remote control wireless transmitting unit 310 , an antenna (not shown) and a plurality of buttons (not shown). The user can transmit a wireless command signal to control the unlocking/locking of the car door by pressing the button on the car key remote controller 30, and the unlocking/locking command signal has an ID code. After the central control unit 100 receives the unlock/lock command signal via the antenna 120 and the central wireless transceiver unit 110, if it confirms that the ID code in the command matches the built-in ID code of the vehicle, it will control the door lock (not icon) to unlock and lock the doors.

The tire pressure sensing module 20 includes a tire pressure processing unit 200, a tire pressure wireless receiving unit 210a, a tire pressure wireless transmitting unit 210b and a tire pressure antenna (not shown), wherein the tire pressure wireless receiving unit 210a and the tire pressure The wireless transmitting unit 210 b can transmit signals wirelessly with the central wireless transmitting unit 110 b and the central wireless receiving unit 110 a of the integrated controller 10 , and can be integrated into a tire pressure wireless transceiver unit 210 . The tire pressure sensing module 20 additionally includes a tire pressure sensing unit 220 and a power supply (such as a battery) 230, wherein the power supply 230 supplies power to other components in the tire pressure sensing module 20; The unit 220 is electrically connected to the tire pressure processing unit 200 to transmit the measured tire pressure data to the tire pressure processing unit 200 . The tire pressure processing unit 200 can process the measurement data of the tire pressure sensing unit 220 and convert it into a signal suitable for transmission by the tire pressure wireless transceiver unit 210 . In addition, the tire pressure processing unit 200 can receive control commands from the central control unit 100 (received via the tire pressure wireless transceiver unit 210 ) to control the tire information signal transmission cycle (details will be described later). In addition, the tire pressure sensing module 20 may further include other sensing units, such as a temperature sensing unit (not shown) or a power sensing unit (not shown), to sense the temperature inside the tire and the battery power.

The tire pressure sensing module 20 transmits tire information signals to the integrated controller 10 with a longer standby period when the vehicle is not in use (for example, when the ignition is off), wherein the tire information signals include tire pressure, tire temperature and battery At least one of the power data. When the tire pressure sensing module 20 receives the tire information request signal sent by the integrated controller 10 , it will immediately send the tire information signal to the integrated controller 10 within a predetermined period (for example, 6 seconds). The tire information signal is transmitted on a high frequency carrier (eg 433.92MHz or 315MHz). According to a preferred example of the present invention, at this time, the tire information signal includes at least one tire pressure data. The tire pressure sensing module 20 transmits tire information signals to the integrated controller 10 in a short operation period when the vehicle is in use (for example, after ignition), wherein the tire information signals include tire pressure, tire temperature and battery power data at least one of the

Referring to FIG. 3 , it is a flowchart illustrating the operation of the integrated tire pressure monitoring and vehicle remote unlocking system of the present invention. At step S100, the vehicle is in a locked state. Then in step S102, the integrated controller 10 receives the unlocking command signal from the car key remote controller 30, and after judging that the identification code of the unlocking command signal matches (S110), an unlocking action is performed (S112) .

After the vehicle is unlocked, the integrated controller 10 will immediately send a tire information request signal to the tire pressure sensing module 20 to request the tire pressure sensing module 20 to transmit tire information immediately (S114), and the tire pressure sensor The measurement module 20 will transmit the tire information (the tire information includes at least one tire pressure data) to the integrated controller 10 as a tire information signal within a predetermined period (for example, 6 seconds), and store it in the vehicle's On the integrated controller 10. Then the integrated controller 10 will judge the engine ignition of the vehicle (S120), and the integrated controller 10 sends a cycle switching signal to the tire pressure sensing module 20 to switch the tire pressure sensing module 20 to send tire information The period of the signal (S122).

Referring to FIG. 4 , it is a schematic diagram illustrating a cycle of sending tire information signals. Before the engine is ignited, the tire pressure sensing module 20 sends tire information signals with a longer standby period (standby period) Ps. After the door is unlocked, the integrated controller 10 sends a tire information request signal to the tire pressure sensing module 20, and the tire pressure sensing module 20 immediately transmits a tire information signal including at least tire pressure data (see FIG. 4 The signal with a slash) is sent to the integrated controller 10 to immediately inform the integrated controller 10 of the tire pressure data. After the engine is turned on, the tire pressure sensing module 20 sends tire information signals with a short operation period (Operation period) Po, where Ps>Po. Therefore, after the vehicle is ignited and driven, the user can know the latest tire pressure data (sent at a period Po) in real time. When the vehicle is not running, the user can still know the updated tire pressure data (sent in a longer period Ps), and the battery power of the tire can be saved.

After the vehicle is ignited, if the integrated controller 10 determines that the engine of the vehicle is off (S130), the integrated controller 10 sends a cycle switching signal to the tire pressure sensing module 20 to switch the tire pressure sensing module 20 The cycle of transmitting the tire information signal (S132). More specifically, the tire pressure sensing module 20 switches the cycle of sending tire information signals to a longer standby cycle Ps to save power.

If the integrated controller 10 receives the lock command signal (S140) from the car key remote controller 30, this situation represents that the owner should leave the vehicle and the vehicle is no longer in the driving state, so the integrated controller 10 will Return its operating state to the initial locked state (step S100 ), and continue to wait for the unlock command signal from the car key remote controller 30 to be received.

To sum up, the system and method for integrating tire pressure monitoring and keyless entry of the present invention include the following features:

1. Only one set of wireless transceiver unit is needed in the car to correspond to the tire pressure monitoring system and the keyless entry system, so the manufacturing cost will be greatly saved.

2. After the keyless entry system operates to unlock the door lock, immediately transmit the tire information request signal to the tire pressure sensing module, and the tire pressure sensing module will transmit at least the tire pressure data within a predetermined period (for example, within 6 seconds) Tire information, so that users can know the tire pressure data in time before driving, to meet higher safety requirements.

3. Before the vehicle is ignited, the tire pressure sensing module sends out the tire information in a longer period, and after the vehicle is ignited, the tire pressure sensing module sends out the tire information in a shorter period to take into account safety and energy saving. Electricity.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (10)

1. A system integrating tire pressure monitoring and remote keyless entry, which is applied to a vehicle and a vehicle key remote, and the vehicle key remote transmits a signal of a predetermined carrier frequency; it is characterized in that the system includes: an integrated controller located within the vehicle and comprising a central control unit and a central wireless transceiver unit, wherein the central wireless transceiver unit is electrically connected to the central control unit; and At least one tire pressure sensing module is located in the vehicle tire and includes a tire pressure processing unit, a tire pressure wireless transceiver unit and a tire pressure sensing unit, wherein the tire pressure processing unit is electrically connected to the tire pressure wireless transceiver unit and the tire pressure sensing unit, and the tire pressure wireless transceiver unit operates at the predetermined carrier frequency; Wherein the integrated controller sends a tire information request signal to the tire pressure sensing module after receiving the unlock signal from the car key remote controller and confirming the identity authentication code of the unlock signal, and the tire pressure sensing module A tire information signal including at least tire pressure data is sent within a predetermined period. 2. The system integrating tire pressure monitoring and remote keyless entry according to claim 1, wherein the predetermined time limit is 6 seconds. 3. The system integrating tire pressure monitoring and remote keyless entry according to claim 1, characterized in that, before the vehicle engine is ignited, the tire pressure sensing module sends the tire information signal in a standby period, and in the After the vehicle engine is ignited, the tire pressure sensing module sends the tire information signal in an operation period, and the standby period is longer than the operation period. 4. The system integrating tire pressure monitoring and remote keyless entry according to claim 1, wherein the predetermined carrier frequency is 433.92MHz or 315MHz. 5. The system integrating tire pressure monitoring and remote keyless entry according to claim 1, wherein the tire pressure sensing module further comprises a battery. 6. A method for integrating tire pressure monitoring and remote keyless entry, applied to a vehicle and a vehicle key remote, the vehicle key remote transmits a signal of a predetermined carrier frequency, characterized in that the method includes: (a) When the vehicle is locked, detect the unlocking signal from the remote control of the vehicle key; (b) if confirming the identity authentication code from the unlocking signal of the car key remote controller, then sending a tire information request signal to a tire pressure sensing module; and (c) The tire pressure sensing module sends a tire information signal within a predetermined period, the tire information signal is transmitted at the predetermined carrier frequency and at least includes tire pressure data. 7. The method for integrating tire pressure monitoring and remote keyless entry according to claim 6, wherein the predetermined carrier frequency is 433.92MHz or 315MHz. 8. The method for integrating tire pressure monitoring and remote keyless entry according to claim 6, wherein the predetermined time limit is 6 seconds. 9. The method for integrating tire pressure monitoring and remote keyless entry according to claim 6, wherein before the vehicle engine is ignited, the tire pressure sensing module sends the tire information signal in a standby period, and in the After the vehicle engine is ignited, the tire pressure sensing module sends the tire information signal in an operation period, and the standby period is longer than the operation period. 10 . The method for integrating tire pressure monitoring and remote keyless entry according to claim 6 , wherein the tire pressure sensing module is a battery type tire pressure sensing module. 11 .

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