TWI485078B - Tire pressure monitoring system - Google Patents

Description

Tire pressure monitoring system

The present invention relates to an automobile tire pressure monitoring system (TPMS system), and more particularly to a TPMS system suitable for trucks that frequently change trailers.

The tire pressure monitoring system has entered the field of cars, and the technology is more mature. However, it is used less in the truck field because the truck trailers are frequently replaced, sometimes even changed several times a day, which leads to monitoring in the truck system. Objects - tires are frequently replaced, making tire monitoring difficult.

In this case, most of the current practice is to install a receiver to monitor the trailer tire on the trailer, the front mounted receiver to monitor the front tire, the two receivers are connected by wire, and the data is transmitted by wire. The data is transmitted to the display of the front of the car. When the truck is replacing the trailer, replace the wiring harness between the two.

Although this method can solve the problem caused by the replacement of the trailer, the obvious drawback of this method is that a large number of wire harnesses need to be arranged on the vehicle, and the installation is rather troublesome. Moreover, after the replacement of the trailer, professional human operation is required to make the system update to identify the monitored transmitter. This method is not only expensive to install, but also low in maintenance efficiency.

In order to solve the above problem, U.S. Patent Publication No. US 2006/0279416 A1 proposes a tire pressure monitoring system that monitors a tire of a trailer portion in a combination of a transponder 21 and an ID reader 13. The code reader 13 is mounted to the rear of the vehicle head, and the transponder 21 is mounted on the trailer. The receiver of the front end transmits the information control transponder 21 through the code reader 13, and the transponder 21 transmits the data to the code reader 13, and the code reader 13 feeds back the relayed data to the receiver. This solves the problem of the connection line between the front and the trailer. But this approach still has the following disadvantages:

1. The system is more complicated. The front part of the car needs to install the code reader and the trailer information receiving circuit, and the lead wire needs to be connected to the tail of the vehicle head. Therefore, the amount of the wiring harness installed in the front part is not significantly reduced;

2. After each replacement of the trailer, you need to start the reader and read the tire ID information of the trailer part.

The technical problem to be solved by the present invention is to provide a more simplified and flexible tire pressure monitoring system.

The technical solution adopted by the present invention to solve the above technical problem is to provide a tire pressure monitoring system suitable for a vehicle having a first component and a replaceable second component, the tire pressure monitoring system including a register, a repeater, and receiver. The registrar is configured to wirelessly transmit a registration code corresponding to the automobile; the repeater is disposed on the second component, and is configured to forward the second tire information sent by the tire pressure transmitter of each tire on the second component, when the When the repeater receives the registration code, the tire information is attached to the registration code and then forwarded. The receiver is disposed on the first component for receiving the second tire information, wherein when the registration code included in the second tire information is consistent with the registration code of the car saved by the receiver, the receiver The second tire information is processed as tire information on the second part of the car.

In an embodiment of the invention, the first component is a front end of a car, and the second component is a trailer of an automobile.

In an embodiment of the invention, the registrar is disposed on the first component and periodically sends the registration code. In another embodiment of the invention, the registrar can be a standalone device.

In an embodiment of the invention, the second tire information sent by the tire pressure transmitter includes: tire identification information and tire pressure, wherein the tire identification information corresponds to the identification information of the tire pressure transmitter on the second component.

In an embodiment of the invention, the repeater includes: a reading unit for reading tire identification information of each tire on the second component, wherein each tire identification information is stored in an ID inserted into the reading unit a code information memory; a controller for processing forwarding of the tire information, wherein the controller is in the tire identification information in the second tire information sent by the tire pressure transmitter and the tire identification in the reading unit The second tire information is processed when the information is consistent.

In an embodiment, the repeater may further include: a standard air pressure setting circuit for providing an interface for setting a standard air pressure value of each tire.

In an embodiment of the invention, the receiver includes updating the tire identification information based on the received second tire information.

In an embodiment of the invention, the receiver is further configured to receive first tire information sent by a tire pressure transmitter of each tire on the first component, where the received first tire information includes When the tire identification information is consistent with the tire identification information stored in the receiver, the receiver processes the first tire information as the tire information of the front part of the automobile.

In an embodiment of the present invention, the receiver may include: a reading unit for reading tire identification information of each tire on the first component, wherein each tire identification information is saved in the reading code The ID code information memory of the unit; and a standard air pressure setting circuit for providing an interface for setting a standard air pressure value of each tire on the first component.

The present invention has the following significant advantages as compared with the prior art by adopting the above technical solutions:

1. Using the registration code sender to perform automatic code matching, the monitoring process is completely automated, no human operation is required, the user does not need professional operation when using, and the manual error of code may be reduced, and the use is simpler and more convenient. Automation, so that the maintenance costs during the user's use are reduced, and the efficiency of vehicle use is improved.

2. Since the wireless connection method is adopted between the repeater and the receiver, the installation is greatly simplified, and a large number of wire harnesses are reduced, and the hardware cost and the installation labor cost are reduced.

Because many trucks have trailers and front-end replacement, the tires of the same system are not fixed, which means that the tires monitored by the system are not fixed. However, relatively speaking, the tires of the front part and the trailer are substantially unchanged. Therefore, according to an embodiment of the present invention, a tire pressure monitoring system (TPMS) is proposed, which is registered by wirelessly by setting a code register. The system automatically recognizes the replacement of the trailer and is easy to install and use.

1 is a schematic view showing the arrangement of a tire pressure monitoring system on an automobile according to an embodiment of the present invention. 2 shows a tire pressure monitoring system (TPMS) structure in accordance with an embodiment of the present invention. The tire pressure monitoring system is mounted on a vehicle 100 having a first component (such as the front portion 101) and a second component (such as the trailer portion 102). The tire pressure monitoring system includes a register 10, a tire pressure transmitter 20a of the trailer portion, a tire pressure transmitter 20b of the front portion, a repeater 30, and a receiver 40.

Each of the tire pressure transmitters 20a, 20b is mounted on each tire of the automobile one by one, and is responsible for monitoring the pressure of the tire (also having temperature), and sending it out periodically. When an alarm occurs, the data notification receiver 40 is immediately sent to give an alarm. . Here, the tire information transmitted by the tire pressure transmitter 20a is referred to as second tire information, and the tire information transmitted by the tire pressure transmitter 20b is referred to as first tire information. The first and second tire information may include tire pressure, tire identification (ID) information, wherein the tire ID information substantially corresponds to the ID of each pressure transmitter. The information transmitted by the tire pressure transmitter 20a of the trailer portion needs to be relayed by the repeater 30, and the tire pressure transmitter 20b of the front portion can be directly transmitted to the receiver 40. In the following description, the information transmission flow of the tire pressure transmitter 20a of the trailer portion will be emphasized.

In an embodiment, as shown in FIG. 3, the registrar 10 is mounted on the front of the vehicle. At 101, it has a fixed unique car registration code, and the registration code is sent periodically. The structure of the register 10 is as shown in FIG. 2, and includes a controller 11, a signal transmitting unit 12, and a battery power supply circuit 13. The register 10 is powered by a lithium battery. The transmission power of the registrar 10 is controlled in the design so that its coverage is near the receiving antenna 31 of the repeater 30 of the system to ensure that the repeater can reliably receive the registration code, while the repeaters of other vehicles cannot receive it. Go to the registration code. The Registrar 10 uses a large capacity battery to provide a working life of up to 10 years. In another embodiment, the registrar 10 can also send a registration code to the receiver 40 to provide registration. In yet another embodiment, the registrar 10 can also be a stand-alone handheld device that is sent by the operator to the repeater 30 when needed.

Referring to FIGS. 2 and 4, the repeater 30 includes a central controller 32, a transmitter signal receiving unit 33, a registrar signal receiving unit 34, a signal transmitting unit 35, a power supply circuit 36, a standard air pressure setting circuit 37, and a reading code. Circuit 38 and other circuits. The repeater 30 is mounted on the trailer 102, and is connected to the normal fire line power of the trailer portion, and is responsible for forwarding the second tire information transmitted by the tire pressure transmitter 20a of each tire on the trailer 102. After the repeater 30 needs to be registered by the register 10 Only work properly. Specifically, the repeater 30 receives the registration code information sent by the registrar 10 through the registrar signal receiving unit 34, and after the registration is successful, the repeater 30 monitors the second tire information (for example, the tire ID, The tire position, the tire standard air pressure value, the tire pressure, the temperature, and the like, and the registration code information are transmitted to the receiver 40 through the signal transmitting unit 35. The transmission process is roughly as follows: the repeater 30 receives the tire information from the tire pressure transmitter 20a through the transmitter signal receiving unit 33. The reading unit 38 of the repeater 30 reads the tire ID information of each tire of the trailer portion. In one embodiment, the tire ID information corresponding to each transmitter 20a may be stored in a corresponding ID code information memory (such as an IC card mode), and inserted into the reading unit 38 for reading after the transmitter is installed. Code unit read. The reading unit 38 can be configured in a combination of hardware and/or software. After the repeater 30 receives the second tire information, the central controller 32 extracts the tire ID information therein and compares the tire ID information read by the self-reading unit 38, and then remains and waits for the signal transmitting unit 35 to send to the receiving. The device 40 discards if it is inconsistent and does not process it.

Preferably, the repeater 30 has a function of setting a standard air pressure value. The standard air pressure setting circuit 37 is used to provide an interface for setting the standard air pressure values of the respective tires. The tire pressure standard value is set by: when the tire needs to set the standard air pressure value (such as the first installation of the transmitter and the replacement of the transmitter, etc.), first recharge the tire pressure to the standard air pressure, and long press the setting button of the repeater 30 In 5 seconds, the repeater can be placed in the standard air pressure setting mode. At this time, the tire pressure is charged to the standard tire pressure, and then the frame received by the repeater is based on a certain algorithm (eg, average). The standard pressure for each trailer tire is derived.

In actual operation, after the repeater 30 is activated, the information such as the tire ID information and the set standard air pressure value in each ID code information memory is read. Then, the repeater 30 waits for receiving the registration code, enters the normal monitoring mode after receiving the registration code, and immediately sends all the monitored second tire information, and the registered tire code is attached to the monitored tire information. Thereafter, each time the second tire information monitored is received, it is immediately forwarded once.

Referring to FIGS. 2 and 5, the receiver 40 is mounted on the vehicle head 101, and includes a central controller 41, a power supply circuit 42, a transmitter signal receiving unit 43, a repeater signal receiving unit 44, a reading unit 45, and a display unit. 46. A standard air pressure setting circuit 47, an antenna 48, and the like.

The ID code information memory (not shown) corresponding to the head portion transmitter 20b can be mounted on the reading unit 45 in the receiver 40 to directly monitor the tire pressure transmitter 20b of the front portion. Specifically, the receiver 40 receives the first tire information from the tire pressure transmitter 20b through the transmitter signal receiving unit 43. After the receiver 40 receives the first tire information, the central controller 41 extracts the tire ID information and compares the tire ID information read by the self-reading unit 45, and the same remains and is treated as the front tire information. Then discard it and not process it.

A standard air pressure setting circuit 47 similar to the repeater 30 is also provided in the receiver 40 for setting the standard tire pressure of each tire of the head portion.

The receiver 40 may contain a registration code that is consistent with the registrar 10 as a discriminating indicator that identifies the signal transmitted by the repeater. The registration code may be preset in the receiver or may be obtained by registering with the registrar 10. The registrar 10 may be fixed to a certain part of the front of the vehicle or may be a separate handheld device.

Referring to FIG. 6, when the receiver 40 receives the tire information including the registration code sent by the repeater 30 via the repeater signal receiving unit 44 (step 201), the registration code is extracted (step 202), and The registration code saved by itself is compared (step 203). If it is consistent, it indicates that the tire information is the information of the currently-mounted trailer, and the trailer tire information monitored by the repeater is recorded, and the repeater 30 transmits the information. The tire temperature/pressure information (step 204), for example, is transmitted to the display unit 46 for display to enable monitoring of the vehicle tire. If the registration codes of the two are inconsistent, it is considered that the tire information of the trailer currently being hung is discarded.

When the trailer is replaced, there is no need to replace the trailer repeater 30 and the tire pressure transmitter 20a, and the system automatically completes the tire ID information update by the second tire information including the registration code sent by the repeater, and monitors according to the newly combined system. .

In summary, the embodiment of the present invention proposes a solution for frequently changing a trailer truck tire pressure monitoring system, which can automatically recognize the tire pressure transmitter identity replacement brought by the replacement of the trailer, and automatically adjust the system so that the system can automatically Monitor new tire pressure transmitters. Compared with the solution currently used, the solution proposed by the present invention has the following advantages:

1. Using the registration code sender to perform automatic code matching, the monitoring process is completely automated, no human operation is required, the user does not need professional operation when using, and the manual error of code may be reduced, and the use is simpler and more convenient. Automation, so that the maintenance costs during the user's use are reduced, and the efficiency of vehicle use is improved.

2. Since the wireless connection method is adopted between the repeater and the receiver, the installation is greatly simplified, and a large number of wire harnesses are reduced, and the hardware cost and the installation labor cost are reduced.

10. . . Registrar

11. . . Controller

12. . . Signal transmitting unit

13. . . Battery powered circuit

20a. . . Tire pressure transmitter

20b. . . Tire pressure transmitter

30. . . Repeater

32. . . Central controller

33. . . Transmitter signal receiving unit

34. . . Registrar signal receiving unit

35. . . Signal transmitting unit

36. . . Power supply circuit

37. . . Standard air pressure setting circuit

38. . . Reading unit

40. . . receiver

41. . . Central controller

42. . . Power supply circuit

43. . . Transmitter signal receiving unit

44. . . Repeater signal receiving unit

45. . . Reading unit

46. . . Display unit

47. . . Standard air pressure setting circuit

48. . . antenna

100. . . car

101. . . Front

102. . . trailer

The above described objects, features, and advantages of the present invention will become more apparent from the aspects of the invention.

1 is a schematic view showing the arrangement of a tire pressure monitoring system on an automobile according to an embodiment of the present invention.

Fig. 2 shows the structure of a tire pressure monitoring system according to an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a registrar according to an embodiment of the present invention.

FIG. 4 is a block diagram showing the structure of a repeater according to an embodiment of the present invention.

FIG. 5 is a block diagram showing the structure of a receiver according to an embodiment of the present invention.

FIG. 6 is a flow chart showing the operation of the receiver receiving repeater information according to an embodiment of the present invention.

10. . . Registrar

20a, 20b. . . Tire pressure transmitter

30. . . Repeater

31. . . Receive antenna

40. . . receiver

48. . . antenna

100. . . car

101. . . Front

102. . . trailer

Claims (14)

A tire pressure monitoring system for a vehicle having a front end and a replaceable trailer, the tire pressure monitoring system comprising: a registrar, the registrar being a separate handheld device for wirelessly transmitting when operated by an operator Corresponding to the registration code of the car; the repeater is disposed on the trailer to forward the second tire information sent by the tire pressure transmitter of each tire on the trailer, when the repeater receives the registration code And the second tire information is attached to the registration code and then forwarded; and the receiver is disposed on the vehicle head for receiving the second tire information forwarded by the repeater, wherein the second tire information is included When the registration code is consistent with the registration code of the car saved by the receiver, the receiver processes the second tire information as tire information of the automobile trailer. The tire pressure monitoring system of claim 1, wherein the second tire information comprises: tire identification information and tire pressure, wherein the tire identification information corresponds to identification information of the tire pressure transmitter on the trailer. The tire pressure monitoring system of claim 2, wherein the repeater comprises: a reading unit for reading tire identification information of each tire on the trailer, wherein each tire identification information is saved in Inserting into the ID code information memory of the reading unit; the controller is configured to process the forwarding of the second tire information, wherein the controller is in the second tire information sent by the tire pressure transmitter The second tire information is processed when the tire identification information is consistent with the tire identification information read by the reading unit. The tire pressure monitoring system of claim 3, wherein the repeater further comprises: a standard air pressure setting circuit for providing an interface for setting a standard air pressure value of each tire on the trailer. The tire pressure monitoring system of claim 2, wherein the receiver updates the tire identification information based on the received second tire information. The tire pressure monitoring system of claim 1, wherein the receiver is further configured to receive first tire information sent by a tire pressure transmitter of each tire on the front, wherein the first tire received When the tire identification information included in the tire information is consistent with the tire identification information stored in the receiver, the receiver processes the first tire information as the tire information of the automobile front. The tire pressure monitoring system of claim 6, wherein the receiver comprises: a reading unit for reading tire identification information of each tire on the front head, wherein each tire identification information is saved in the insertion. To the ID code information memory of the reading unit; a standard air pressure setting circuit for providing an interface for setting a standard air pressure value of each tire on the vehicle head. A tire pressure monitoring system for a vehicle having a front end and a replaceable trailer, the tire pressure monitoring system comprising: a register, the registrar is disposed on the front of the vehicle for wirelessly transmitting a registration code corresponding to the automobile; and a repeater is disposed on the trailer for forwarding the tire pressure transmitter of each tire on the trailer The second tire information sent, when the repeater receives the registration code, the second tire information is appended to the registration code and then forwarded; and the receiver is disposed on the front of the vehicle for receiving the repeater Forwarding the second tire information, wherein when the registration code included in the second tire information is consistent with the registration code of the vehicle saved by the receiver, the receiver uses the second tire information as the tire of the trailer of the automobile Information processing. The tire pressure monitoring system of claim 8, wherein the second tire information comprises: tire identification information and tire pressure, wherein the tire identification information corresponds to identification information of the tire pressure transmitter on the trailer. The tire pressure monitoring system of claim 9, wherein the repeater comprises: a reading unit for reading tire identification information of each tire on the trailer, wherein each tire identification information is saved in Inserting into the ID code information memory of the reading unit; the controller is configured to process the forwarding of the second tire information, wherein the controller is in the tire of the second tire information sent by the tire pressure transmitter The second tire information is processed when the identification information is consistent with the tire identification information read by the reading unit. Tire pressure monitoring system as described in claim 10 The repeater further includes: a standard air pressure setting circuit for providing an interface for setting a standard air pressure value of each tire on the trailer. The tire pressure monitoring system of claim 9, wherein the receiver updates the tire identification information based on the received second tire information. The tire pressure monitoring system of claim 8, wherein the receiver is further configured to receive first tire information transmitted by a tire pressure transmitter of each tire on the vehicle head, wherein the first tire information received When the tire identification information included in the tire information is consistent with the tire identification information stored in the receiver, the receiver processes the first tire information as the tire information of the front of the automobile. The tire pressure monitoring system of claim 13, wherein the receiver comprises: a reading unit for reading tire identification information of each tire on the front head, wherein each tire identification information is saved in the insertion. To the ID code information memory of the reading unit; a standard air pressure setting circuit for providing an interface for setting a standard air pressure value of each tire on the vehicle head.