TW201414624A - Wireless tire-pressure detection system and its positioning method - Google Patents

Abstract

The present invention is related to a wireless tire-pressure detection system and its positioning method, which is mainly to respectively dispose a signal generator and a wireless tire-pressure detector connected to the signal generator. Each signal generator respectively generates the mutually different first-directional or second- directional signal along with the tire operation, and transmits to a receiver through the wireless tire-pressure detector. The built-in positioning judgment procedure of the receiver categorizes the first-directional or second- directional signal into a first-directional or second-directional group, and separately judges whether each wireless tire-pressure detector is to be located at the left of right side according to the first-directional or second-directional group. The present invention has the advantage of simplicity in the structure and judgment way to make it easy for the receiver of the wireless tire-pressure detection system to judge the position of each wireless tire-pressure detector.

Description

Wireless tire pressure detecting system and positioning method thereof

The invention relates to a wireless tire pressure detecting system, in particular to a wireless tire pressure detecting system which uses a direction signal generated by a physical device to determine the position of a tire represented by the signal.

In order to enable the driving of the vehicle to instantly grasp the condition of the tires of the vehicle, and avoid the problem of driving safety caused by sudden tire blowout due to excessive tire pressure or insufficient tire pressure, most of the new vehicles that are currently shipped in the EU, Japan and the United States are required. It is equipped with a tire pressure detecting system, which is provided with a tire pressure detector in each of the four tires of the vehicle, and each tire pressure detector continuously detects the air pressure in the corresponding tire for a certain period of time or Temperature, and the wireless signal transmits the detection result to the tire pressure detection system installed in the vehicle. The tire pressure detection system receives the wireless signals transmitted by the tire pressure detectors to identify the air pressure of each tire or Whether the temperature is normal or not, if the result sensed by any of the tire pressure detectors is abnormal, the tire pressure detecting system generates an alarm signal or a display unit notifies the driving of the vehicle.

In order to distinguish the tire pressure detectors from the left front, left rear, right front or right rear tires of the vehicle, the tire pressure detection system can correctly display the detection results of the corresponding tires. The existing common technology is A tire pressure detector is shipped from the factory with a set of non-repeating codes (ID) built in, and the position of each tire pressure detector installed in the vehicle must be installed according to the position specified by the tire pressure detection system. The detection result of the correct position, for example, the tire pressure detection system is equipped with four tire pressure detectors, and the codes are respectively 123456789A, 123456789B, 123456789C and 123456789D, and the tire pressure detection system encodes the aforementioned codes to the left front, left rear, right front and right rear positions respectively. When installing the tire pressure detector, the operator needs to install according to the position corresponding to each code. In order to make the tire pressure detection system obtain the correct detection results of each position, and when each tire pressure detector transmits the signal with the tire pressure detection result, it will transmit its built-in code for tire pressure detection. The measurement system identifies the signals transmitted by each of the tire pressure detectors.

However, when changing the tire pressure detector, the code of the old tire pressure detector must be parsed first, and the code is written into the new tire pressure detector to correspond to the code set by the tire pressure detection system. The location, the copying code and the writing of the code to the new tire pressure detector must be performed by a specific professional appliance or computer equipment, and will be performed by the operator who implements the tire pressure changer. The threshold of professional technology and equipment is forced to force the vehicle user who wants to change the tire pressure detector to return to the original vehicle for the tire pressure detector code copying and setting, which will not only cost more replacement procedures and time. Cost, therefore, how to determine the location of the installation without the need for the original tire pressure detector code has become a problem that must be solved.

For example, the "Determination of wheel sensor position using a wireless solution" is mainly used to determine the position of the tire pressure detector by using the biaxial acceleration detection and the signal amount thereof. The two-axis acceleration detection system respectively detects a first acceleration along a first axial direction and a second acceleration along a second axial direction, and determines a rotation direction of the tire according to the accelerations; the position information is known; The signals received from the respective tire pressure detectors are separately determined to determine the position of each of the tire pressure detectors.

Another example is the "Determination of wheel sensor position using shock sensors and a wireless solution", which mainly uses the leading lag relationship of the signal of the vibration sensor to judge the tire pressure detection. The position of the detector is generated by the first vibration sensor and the second vibration sensor generates a second dynamic signal, and the leading lag relationship between the first and second dynamic signals can determine that the tire pressure detector is located on the left or the right side. Location information.

In the case of the US Patent No. 7423532, "Determination of wheel sensor position using a single radio frequency detector in an automotive remote tire monitor system", The following steps determine the position of the tire pressure detector, record the number of comparison messages, the strength of the evaluation signal, the corresponding code after the comparison of the count, the judgment of the acceleration value and the leading lag relationship of the acceleration detection signal, wherein the step of comparing the number of messages is compared with the majority of the tires. The number of messages of the pressure detector to determine the relative left and right and front and rear position of the tire pressure detector; the evaluation signal strength step is based on the received signal strength to determine the front and rear and left and right position information; the comparison of the corresponding coding steps after the comparison The number of messages, the selection of at least one tag has a greater than the detected transmission amount, and then stops receiving data to obtain the label of each tire pressure detector; the acceleration value judging step is to detect the radio frequency transmission and the tire data according to the evaluation Acceleration signal; the acceleration detection signal RF transmission lag relationship before detecting the tire information signals according to the evaluation of the acceleration lead lag, but may determine the location of the tire pressure detector.

As can be seen from the above, the existing tire pressure detection system wants to detect each tire separately. The actual position of the pressure detector is calculated for various signals. The tire pressure detection system must be combined with a high-order arithmetic processor and a relative calculation program to determine the position of the tire pressure detector. There are still complicated methods. Technical problems, and will inevitably lead to the problem of expensive manufacturing tire pressure detectors.

As mentioned above, the existing tire pressure detecting system wants to separately detect the position of each tire pressure detector, and needs to perform operation comparison on various signals, so that the tire pressure detecting system must be matched with a high-order arithmetic processor and relative The complicated operation program can judge the position of the tire pressure detector, so that it has complicated technical problems, which causes the tire pressure detector to have a high manufacturing cost. Therefore, the main purpose of the present invention is to provide a tire positioning function. The wireless tire pressure detecting system and the positioning method thereof, by detecting the wireless tire pressure detectors in the tires to send different direction signals, determining the direction signals to identify the tires and the wireless tire pressure detectors thereof The position allows the wireless tire pressure monitoring system to easily determine the position of the tire represented by the direction signal when receiving the direction signal of the wireless tire pressure detector, and solves the existing technical problems of the tire pressure detection system with complicated methods and high manufacturing cost. The problem.

The main technical means adopted to achieve the foregoing objectives is to locate the aforementioned wireless tire pressure detecting system, including the following steps: Receiving signal: receiving, by a receiver, a plurality of tire pressure detecting signals generated by a wireless tire pressure detector disposed in a tire of the vehicle, the tire pressure detecting message including the first signal generated by the centrifugal generator of the signal generator Direction signal or direction information of the second direction signal.

Judging the signal content: judging the received tire pressure detection message represents the first The direction information of the direction signal or the second direction signal; the content of the classification signal: if it represents the first direction signal, it is classified into the first direction group, and if it represents the second direction signal, it is classified as the second direction group; : Judging whether the first direction group or the second direction group belongs to the left tire or the right tire of the vehicle; positioning: confirm that the tire pressure detection message received by the receiver is from the left tire or the right tire.

According to the positioning method of the wireless tire pressure detecting system, the present invention can provide a wireless tire pressure detecting system with a tire positioning function, comprising: a plurality of signal generators, which are respectively disposed in each tire of the vehicle and are subjected to the tire Rotating centrifugal force respectively generates different first direction signals or second direction signals; a plurality of wireless tire pressure detectors are respectively electrically connected to different signal generators, and will represent first direction signals or second direction signals The direction information is transmitted to the outside along with the tire pressure detection message; a receiver receives the tire pressure detection information of the wireless tire pressure detector, and the receiver has a positioning judgment program built therein, and the positioning judgment program is It is determined that each tire pressure detection message represents the left or right tire of the vehicle.

Using the wireless tire pressure detecting system composed of the foregoing components, the wireless tire pressure detecting devices are respectively electrically connected to different signal generators and are respectively disposed on the tires of the vehicle, and the signal generator on the same side of the vehicle is opposite to the vehicle. The signal generator on the side receives the centrifugal force of the tire rotation to generate different first direction signals and second direction signals respectively, and the wireless tire pressure detector will represent the direction information of the first direction signal or the second direction signal. Transmitted to the receiver, and then the receiver's positioning judgment program is based on the first direction signal or the second direction The first or second direction group obtained by the signal determines that each wireless tire pressure detector is located on the left or right side of the vehicle, and has the advantages of simple structure and judgment manner, so that the wireless tire pressure monitoring system receives the wireless tire pressure When the detectors are in the direction of the signal, it is easy to discriminate the position of the tire represented by the signal, and solve the inconvenience that the existing tire pressure detection system needs to compare the code to determine the position of the tire, and the technical threshold for comparing and comparing various signals. The problem of excessive manufacturing cost of the product.

For a first preferred embodiment of the present invention, please refer to FIG. 1 , which includes a plurality of signal generators 10 , a plurality of wireless tire pressure detectors 20 and a receiver 30 , and each wireless tire pressure detector 20 is respectively electrically connected to different signal generators 10, and is respectively disposed in each tire (not shown) of a vehicle, wherein: each signal generator 10 can generate a first direction signal or a tire respectively. Is a second direction signal different from the first direction signal. In the preferred embodiment, the signal generator 10 is a centrifugal force switch that generates the first difference according to the centrifugal force when the tire rotates. The direction signal or the second direction signal, the signal generator 10 includes a housing 11 and an action member 12, the housing 11 has opposite ends, which are respectively a first end 111 and a second end 112. 12 is located in the outer casing 11 and is movable between the first end 111 and the second end 112. When the actuating member 12 is subjected to centrifugal force, it will move relative to the first end 111 or the second end 112 of the outer casing 11 as the actuating member. When the 12 contacts or approaches the first end 111, the action member 12 will be the first The terminal 111 is electrically connected to generate a first direction signal, When the actuating member 12 is in contact with or close to the second end 112, the actuating member 12 is electrically connected to the second end 112 to generate a second direction signal. In this embodiment, the signal generator 10 is disposed on the left side wheel. The first end 111 is oriented toward the driving direction (above Figure 1), and the second end 112 is opposite to the driving direction (lower in Fig. 1), oppositely to the signal generator 10 of the right wheel, the second end 112 of which is oriented toward the driving The first end 111 of the direction is opposite to the driving direction; the electrical connection between the actuating member 12 and the first end 111 or the second end 112 may be electrical contact or electric induction; the first direction signal and the second direction signal may be It is a switch signal (ON-OFF) or a signal with a different value or code.

Each wireless tire pressure detector 20 receives the first direction signal or the second direction signal of the corresponding signal generator 10, and will represent the direction information of the first direction signal or the second direction signal, accompanied by the tire pressure. The detection message is transmitted to the external receiver 30, and the direction information may be one of the tire pressure detection messages transmitted by the tire pressure detector 20 to the receiver 30.

The receiver 30 receives the tire pressure detection information of each wireless tire pressure detector 20, and has a positioning determination program 31 built therein. The positioning determination program 31 will represent the first direction signal according to the received tire pressure detection message. Or the direction information of the second direction signal is classified into a first direction group or a second direction group, where the first direction group and the second direction group respectively represent different sides, that is, The signal generator 10 disposed on the same side of the vehicle and the signal generator 10 disposed on the opposite side of the vehicle are subjected to centrifugal force of the tire rotation to respectively generate different first direction signals and second direction signals, the first direction group or the first direction The two-direction group can be judged to be located on the left or right side of the vehicle according to the direction of the driving direction or the direction opposite to the driving direction, as shown in the figure. The first end 111 of the left signal generator 10 is oriented toward the driving direction (above in FIG. 1). When the vehicle is traveling forward, the actuating member 12 is affected by the centrifugal force of the tire to the first end 111, which generates the first direction. The signal is classified into a first direction group by the positioning determining program 31, and the receiver 30 sets the first direction group to represent that the tires of the signal generator 10 and the wireless tire pressure detector 20 are located in the vehicle. On the left side, the second end 112 of the signal generator 10 disposed on the right side is facing the driving direction. When the vehicle is traveling forward, the actuating member 12 is affected by the centrifugal force of the tire to the second end 112 to generate the second direction signal. And the positioning determining program 31 is classified into the second direction group, and the receiver 30 sets the second direction group to represent that the tires for mounting the signal generator 10 and the wireless tire pressure detector 20 are located on the right side of the vehicle. It can be determined that the tire pressure detection message represents the left or right tire of the vehicle.

Thereby, the receiver 30 receives the direction information of the first direction signal or the second direction signal transmitted by each wireless tire pressure detector 20, and can easily determine the position represented by the direction signals.

The second preferred embodiment of the present invention is used to illustrate that the signal generator 10 of the present invention can select different types or configurations of centrifugal force switches. Please refer to FIG. 2, which is substantially the same as the first preferred embodiment. Each of the signal generators 10 is provided with a connecting member 13 between the outer casing 11 and the actuating member 12. The actuating member 12 is connected to the outer casing 11 through the connecting member 13 so that the actuating member 12 is normally located at the first end 111. Between the second end 112, when the actuating member 12 is subjected to centrifugal force, it will move toward the first end 111 or the second end 112 of the outer casing 11. When the actuating member 12 contacts or approaches the first end 111, the actuating member 12 will still The first end 111 remains electrically connected to produce a first The direction signal, when the action member 12 contacts or approaches the second end 112, the action member 12 is electrically connected to the second end 112 to generate a second direction signal; the positioning determining program 31 of the receiver 30 represents the first direction according to the received direction. The signal or the direction information of the second direction signal may be classified into a first direction group or a second direction group to determine the location of the wireless tire pressure detector 20.

Referring to FIG. 3, it is a step of the positioning determining program 31 of the receiver 30: receiving a signal (101): receiving, by the receiver 30, a tire pressure detecting message generated by each wireless tire pressure detector 20, the tire pressure The detection message includes information indicating the direction of the first direction signal or the second direction signal generated by the signal generator 10 due to the centrifugal force of the tire rotation.

Judging the signal content: determining the direction information (103) representing the first direction signal (102) or the second direction signal in the received tire pressure detection message.

The content of the classified signal: if it represents the first direction signal, it is classified into the first direction group (104), and if it represents the second direction signal, it is classified into the second direction group (105).

Judging position: determining that the first direction group or the second direction group belongs to the left side tire (106) or the right side tire (107).

Positioning: Confirm that the tire pressure detection message received by the receiver 30 is from the left tire (108, 109) or the right tire (110, 111).

It can be seen that, by using the first or second direction signals generated by the signal generator 10, a corresponding first direction group or a second direction group can be obtained, by the first or second direction group. Comparing with the driving direction, each of the signal generators 10 and each of the wireless tire pressure detectors 20 are mounted on In the tire on the left or right side of the vehicle, the existing tire pressure detection system needs to compare the code to determine the inconvenience of the tire position, and the technical threshold for the comparison of various signals and the high production cost of the product, to achieve the wireless tire When the pressure monitoring system receives the direction signals forwarded by the wireless tire pressure detector 20, it is easy and simple to determine the tire position represented by the direction signal.

10‧‧‧Signal Generator

11‧‧‧Shell

111‧‧‧ first end

112‧‧‧ second end

12‧‧‧Action parts

13‧‧‧Links

20‧‧‧Wireless tire pressure detector

30‧‧‧ Receiver

31‧‧‧ Positioning judgment procedure

Figure 1 is a schematic view showing the configuration of a first preferred embodiment of the present invention.

Figure 2 is a schematic view showing the configuration of a second preferred embodiment of the present invention.

Figure 3 is a flow chart showing the judgment of the receiver of the first preferred embodiment of the present invention.

10‧‧‧Signal Generator

20‧‧‧Wireless tire pressure detector

30‧‧‧ Receiver

31‧‧‧ Positioning judgment procedure

Claims (10)

A wireless tire pressure detecting system includes: a plurality of signal generators disposed in each tire of a vehicle, which are respectively subjected to centrifugal force of rotation of the tire to respectively generate different first direction signals or second direction signals; The wireless tire pressure detectors are respectively electrically connected to different signal generators, and will represent direction information of the first direction signal or the second direction signal, and transmit the tire pressure detection information to the outside; a receiver receives the The tire pressure detecting information of the wireless tire pressure detector has a positioning judgment program built in the receiver, and the positioning determining program determines that each tire pressure detecting message represents the left tire or the right tire of the vehicle. The wireless tire pressure detecting system of claim 1, wherein the signal generator has a first end and a second end, and the signal generator includes an action member that is affected by the centrifugal force of the tire rotation. A first direction signal or a second direction signal is generated to the first end or the second end. The wireless tire pressure detecting system of claim 2, wherein the signal generator comprises a connecting member, and the actuating member is connected to the outer casing of the signal generator through the connecting member, so that the actuating member is normally located at the first Between the end and the second end. The wireless tire pressure detecting system of claim 2 or 3, wherein the actuating member is electrically connected to the first end or the second end to generate a corresponding first direction signal or second direction signal, and the electrical connection may be The first direction signal and the second direction signal may be an ON-OFF signal or a signal having a different value or code. The signal generated by the wireless tire pressure detecting system described in claim 2 When the device is disposed on the left side of the wheel, the first end thereof is oriented toward the driving direction, and the signal generator is disposed on the right side of the wheel such that the first end thereof is opposite to the driving direction. According to the wireless tire pressure detecting system of claim 1 or 2, the positioning determining program classifies the direction information representing the first direction signal or the second direction signal into a first according to the received tire pressure detection message. a direction group or a second direction group, and set to determine whether the first direction group or the second direction group represents a left tire or a right tire of the vehicle. A positioning method for a wireless tire pressure detecting system includes the following steps: receiving a signal: receiving, by a receiver, a plurality of tire pressure detecting signals generated by a wireless tire pressure detector disposed in a tire of a vehicle, the tire pressure detecting The message includes information indicating the direction of the first direction signal or the second direction signal generated by the centrifugal force of the tire rotation; determining the content of the signal: determining the direction information of the first direction signal or the second direction signal in the received tire pressure detection message ; classification signal content: if the first direction signal is classified as the first direction group, if it represents the second direction signal, it is classified as the second direction group; judging position: judging the first direction group or the second The direction group belongs to the left or right tire of the vehicle; positioning: confirm that the received tire pressure detection message is from the left tire or the right tire. The positioning method of the wireless tire pressure detecting system according to claim 7, wherein the wireless tire pressure detecting device transmits direction information and a tire pressure detecting message representing the first direction signal or the second direction signal to the receiver. The positioning method of the wireless tire pressure detecting system according to claim 7, The first direction signal or the second direction signal is a centrifugal force that is rotated by the tire, and generates different direction information respectively. The positioning method of the wireless tire pressure detecting system according to any one of claims 7 to 9, wherein the positioning step is performed by a positioning determining program of the receiver to represent the direction of the first direction signal or the second direction signal. The information is classified into a first direction group or a second direction group, and is set to determine whether the first direction group or the second direction group represents a left tire or a right tire of the vehicle.